JP2000325991A - Control device of biological water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently perform denitrification or dephosphorization while ensuring good water quality by appropriately regulating the flow rate of sewage flowing in an anaerobic tank or a oxygen-free tank other than operation quantities such as the aeration quantity to a biological reaction tank, the amt. of activated sludge stored in the biological reaction tank, the flow rate of activated sludge returned to the biological reaction tank or the like. SOLUTION: A control device is equipped with a nitrate nitrogen densitometer 43 for measuring the concn. of nitrate nitrogen in sewage in the mixed liquid in an oxygen-free tank 5, a setting device 31 for setting the target value of the concn. of nitrate nitrogen, a regulator 21 for outputting a signal setting the bypass inflow sewage amt. to the oxygen-free tank 5 to a predetermined value to an inflow-oxygen-free tank bypass inflow pump 12 corresponding to the difference between the measured value of the nitrate nitrogen densitometer 43 and the target value set to the setting device 31 and the inflow-oxygen-free tank bypass inflow pipe 12 provided in a piping (j) in order to regulate the bypass flow rate of sewage flowing in the oxygen-free tank 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a biological water for removing nitrogen in water to be treated by the biological action of nitrifying or denitrifying bacteria and phosphorus in the water to be treated by the biological action of phosphorus accumulating bacteria. The present invention relates to a control device for a processing device.

[0002]

2. Description of the Related Art As nitrogen and phosphorus contained in sewage continue to flow into lakes and marshes and strongly closed bays, their concentrations eventually become excessive, and harmful phytoplankton such as blue-green algae and red tide are generated. This is called the eutrophication phenomenon.
It has become a serious social problem.

"Water treatment engineering (edited by Tetsuo Ide, Technical Hall)"
Activated sludge method is a general method for treating municipal sewage and organic wastewater as described in US Pat. The activated sludge method oxidizes organic substances, which are the main pollutant components in sewage, by storing microorganisms having a purification function (activated sludge) in a biological reaction tank and aerating it while sufficiently mixing and contacting it with sewage. It is a method of decomposing. The mixed solution after the aeration treatment is separated in the sedimentation tank into supernatant water and activated sludge, which are sewage after activated sludge treatment, the supernatant water is discharged out of the system, and the concentrated activated sludge is returned to the biological reaction tank again. You.

[0004] The activated sludge method is a treatment method whose main purpose is to oxidatively decompose organic substances, and it is impossible to sufficiently remove nitrogen and phosphorus as it is. Therefore, a modified activated sludge method utilizing the function of certain microorganisms has been developed (Advanced Treatment Facility Design Manual (draft), Japan Sewer Association, 1994).

For example, there is a biological nitrogen phosphorus removal method called an anaerobic anoxic aerobic method. In this treatment method, phosphorus in sewage is removed using "phosphorus accumulating bacteria", and nitrogen in sewage is removed by combining the functions of "nitrifying bacteria" and "denitrifying bacteria".

[0006] When a phosphorus-accumulating bacterium is placed in a state free of oxidizing substances such as oxygen and nitrate nitrogen, so-called anaerobic state, the phosphorus-accumulating bacterium discharges phosphoric acid phosphorus from the body into a liquid phase. After this state is continued for a certain period of time, when the phosphorus-accumulating bacterium is placed in a state of oxygen, that is, an aerobic state, the phosphorus-accumulating bacterium ingests more phosphate phosphoric acid than released into the liquid phase. Therefore, the concentration of phosphoric acid in sewage can be reduced to below the initial concentration by utilizing the phosphorus accumulating bacteria, and finally it can be reduced to a concentration close to almost zero. It is generally known that as the amount of phosphorus discharged in an anaerobic state increases, the amount of phosphorus intake in an aerobic state increases.

On the other hand, nitrite bacterium (mainly Nitrosomonas), which is an autotrophic bacterium, oxidizes ammonia nitrogen by the reaction shown in the following formula (1) under aerobic conditions, and nitrifying bacterium (mainly, nitrotrophic bacterium) Nitorobacter) oxidizes nitrite nitrogen under aerobic conditions by the reaction shown in the following formula (2).

Embedded image Therefore, ammoniacal nitrogen is produced by the nitrifying bacteria nitrifying bacteria and nitrifying bacteria nitrifying bacteria by the nitrification reaction shown in the following formula (3), which is expressed by combining the above formulas (1) and (2). Oxidized to nitrate nitrogen.

Embedded image When the water to be treated treated with nitrifying bacteria is sent to a denitrification treatment tank under anoxic condition, the denitrifying bacteria, which are facultative anaerobic bacteria, perform nitrate respiration or nitrite respiration, and the following (4) From the formula (6), nitric nitrogen and nitrite nitrogen are reduced to nitrogen gas by the denitrification reaction shown in formula (6).

Embedded image Therefore, nitrogen contained in sewage can be removed by combining the functions of nitrifying bacteria and denitrifying bacteria. In addition, if nitrification is sufficiently achieved and denitrification corresponding to the nitrification is performed, the nitrogen removal amount increases.

FIG. 266 is a configuration diagram showing a biological water treatment apparatus of a first conventional example based on an anaerobic anoxic aerobic method. FIG. 267
FIG. 2 is a configuration diagram showing a biological water treatment apparatus of Conventional Example 2 by an anaerobic anoxic aerobic method. FIG. 268 is a configuration diagram showing a biological water treatment apparatus according to Conventional Example 3 using an anaerobic anoxic aerobic method. FIG. 269 is a configuration diagram showing a biological water treatment apparatus of Conventional Example 4 using an anaerobic anoxic aerobic method. FIG. 270 is a configuration diagram showing a biological water treatment apparatus of a conventional example 5 using an anaerobic anoxic aerobic method. FIG. 271 is a configuration diagram showing a biological water treatment apparatus of a conventional example 6 using an anaerobic anoxic aerobic method. FIG.
6 to 271, 1 is a first sedimentation tank for storing sewage, which is water to be treated, which flows in from outside the system; 2 is a biological reaction tank for storing a microorganism group (activated sludge) including phosphorus accumulating bacteria, nitrifying bacteria and denitrifying bacteria; Reference numeral 3 denotes a final sedimentation basin for separating the mixed solution flowing out of the biological reaction tank 2 into supernatant water, which is sewage after activated sludge treatment, and activated sludge.

In the biological reaction tank 2, 4 is an anaerobic tank in an anaerobic state for discharging phosphoric acid phosphorus from the phosphorus accumulating bacteria, and 5 is an anoxic state in order to perform a denitrification reaction by denitrifying bacteria. The oxygen tank 6 is an aerobic tank that is in an aerobic state to allow phosphorus accumulating bacteria to take in phosphoric acid phosphorus and to perform a nitrification reaction by nitrifying bacteria. Reference numeral 7 denotes an aerator for supplying air to the aerobic tank 6.

Further, a is a pipe connected to the first sedimentation basin 1 for flowing sewage flowing from outside the system into the first sedimentation basin 1, and b is a sewage flowing out of the first sedimentation basin 1 for the biological reaction tank 2.
A pipe connected to the first sedimentation basin 1 and the anaerobic tank 4 to flow into the sedimentation basin 3 and the aerobic tank 6 and the final sedimentation basin 3 for flowing the mixed solution flowing out of the biological reaction tank 2 into the final sedimentation basin 3. A pipe connected to the final sedimentation basin 3 for discharging the supernatant water separated in the final sedimentation basin 3 out of the system;
e is a pipe connected to the aerobic tank 6 and the anoxic tank 5 for circulating the mixed liquid in the aerobic tank 6 to the anoxic tank 5, and f is the activated sludge separated in the final sedimentation tank 3. A pipe connected to the bottom of the final sedimentation basin 3 for taking out from the sedimentation basin 3 is connected to the pipe f and the anaerobic tank 4 for returning the activated sludge taken out from the final sedimentation basin 3 to the biological reaction tank 2. Is a pipe connected to the pipe f for discharging an excess of the activated sludge taken out from the final sedimentation basin 3 to the outside of the system.

Reference numeral 8 denotes a circulation pump provided on a pipe e for adjusting the flow rate of the mixture circulating in the oxygen-free tank 5;
Reference numeral 9 denotes a return pump provided on the pipe g for adjusting the flow rate of the activated sludge returned to the biological reaction tank 2, and reference numeral 10 denotes a discharge pump provided on the pipe h for controlling the flow rate of the activated sludge discharged outside the system. It is a pump.

In FIGS. 266 and 271, i is a pipe connected to the pipe b and the oxygen-free tank 5 for bypassing a part of the sewage flowing out of the sedimentation tank 1 into the oxygen-free tank 5; Reference numeral 11 denotes a primary sink-oxygen-free tank bypass inflow pump provided in the pipe i for adjusting the flow rate of sewage flowing into the anoxic tank 5 by bypass. In addition, FIG.
9, in FIG. 270, j is a pipe connected to the pipe a and the anoxic tank 5 for bypassing a part of the sewage flowing from outside the system to the anoxic tank 5, and 12 is a bypass to the anoxic tank 5. This is an inflow-oxygen-free tank bypass inflow pump provided in the pipe j for adjusting the flow rate of inflow sewage. Also,
In FIG. 268, k is a pipe connected to the pipe a and the anaerobic tank 4 for partially flowing sewage flowing from outside the system into the anaerobic tank 4, and 13 is a flow rate of sewage flowing into the anaerobic tank 4 by bypass. The inflow provided in the pipe k to adjust the
Anaerobic tank bypass inflow pump. In FIGS. 269 and 271, reference numeral 14 denotes a first sedimentation basin inflow pump provided on the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation basin 1. In FIG. 270, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

Next, the operation will be described. The sewage that has flowed in from outside the system flows into the first sedimentation basin 1 via the pipe a and is stored in the first sedimentation basin 1. The sewage flowing out of the first sedimentation basin 1 flows into the biological reaction tank 2 via the pipe b. Biological reaction tank 2
The sewage that flows into the sludge mixes with the activated sludge. The mixed liquid of the sewage and the activated sludge has a small opening formed in the partition between the anaerobic tank 4 and the oxygen-free tank 5 and a small opening formed in the partition between the oxygen-free tank 5 and the aerobic tank 6. Through anaerobic tank 4, anoxic tank 5,
It moves in the order of the aerobic tank 6 and flows out of the biological reaction tank 2. Here, a part of the mixed liquid in the aerobic tank 6 is circulated to the oxygen-free tank 5 via the pipe e by the circulation pump 8. Biological reaction tank 2
Of the mixture flowing out of the tank flows into the final sedimentation basin 3 via the pipe c. The mixed solution flowing into the final sedimentation basin 3 is separated into supernatant water and activated sludge. The supernatant water is discharged out of the system through a pipe d, and the activated sludge is taken out of the final sedimentation basin 3 through a pipe f. The activated sludge taken out from the final sedimentation basin 3 is returned to the biological reaction tank 2 via the pipe g by the return pump 9, but the excess is discharged outside the system via the pipe h by the discharge pump 10.

During the operation described above, the phosphorus accumulating bacteria discharge phosphoric acid phosphorus in the anaerobic tank 4. When the phosphorus accumulating bacteria that have discharged the phosphoric acid phosphorus in the anaerobic tank 4 move to the aerobic tank 6, the phosphorus accumulating in the aerobic tank 6 in the aerobic state by the oxygen supplied from the aeration tank 7. The bacterium ingests more phosphoric acid phosphorus exhaled in the anaerobic tank 4. The mixed solution containing the phosphoric acid-accumulating bacteria ingesting the phosphoric acid phosphorus flows out of the biological reaction tank 2, and a part of the phosphoric acid accumulating bacteria ingesting the phosphoric acid phosphorus is discharged out of the system through the pipe h as excess activated sludge. Is done. Therefore, the phosphorus in the sewage is removed together with the excess activated sludge.

On the other hand, during the above-described operation, most of the nitrogen is contained in the sewage flowing from outside the system as ammoniacal nitrogen, so that a mixed solution of the sewage and the activated sludge is supplied to the aerobic tank 6.
Then, the nitrifying bacteria in the aerobic tank 6 oxidize the ammonia nitrogen to nitrate nitrogen and nitrite nitrogen. When a part of the mixture of the sewage treated with the nitrifying bacteria and the activated sludge is circulated to the anoxic tank 5 via the pipe e, the denitrifying bacteria in the anoxic tank 5 are subjected to nitrate respiration or nitrite respiration. To reduce nitrate nitrogen and nitrite nitrogen to nitrogen gas by a denitrification reaction. Therefore, nitrogen in the sewage is removed as nitrogen gas.

Note that organic substances are necessary for the denitrification reaction, but when the concentration of organic substances in the sewage is low, all the organic substances in the sewage flowing into the anaerobic tank 4 may be consumed in the anaerobic tank 4. In some cases, it is necessary to supply the amount of organic substances necessary for the denitrification reaction to the oxygen-free tank 5. Therefore, Conventional Example 1
In the apparatus (1), a part of the sewage flowing out of the sedimentation basin 1 is de-nitrified by bypass-inflow into the anoxic tank 5 through the pipe i while adjusting the flow rate by the initial sedimentation-anoxic tank bypass inflow pump 11. The amount of organic substances necessary for the reaction is supplied to the oxygen-free tank 5. Further, in the device of the conventional example 2, a part of the sewage having a higher organic substance concentration than the inflow from outside the system is introduced into the anoxic tank 5 via the pipe j while the flow rate is adjusted by the inflow-anoxic tank bypass inflow pump 12. By flowing in, the amount of organic substances necessary for the denitrification reaction is supplied to the oxygen-free tank 5.

Organic substances are also required for discharging phosphorus from phosphorus accumulating bacteria, and the amount of organic substances required for discharging phosphorus is determined by the anaerobic tank 4.
May need to be supplied. For this reason, in the device of the conventional example 3, a part of the sewage having a higher organic substance concentration than the inflow from outside the system is introduced into the anaerobic tank bypass inflow pump 13.
By flowing into the anaerobic tank 4 via the pipe k while adjusting the flow rate, the amount of organic substances necessary for discharging phosphorus is supplied to the anaerobic tank 4.

In some cases, it is necessary to supply both the amount of organic substances necessary for the denitrification reaction to the oxygen-free tank 5 and the amount of organic substances necessary for discharging phosphorus to the anaerobic tank 4.
For this reason, in the apparatus of the conventional example 4, a part of the sewage having a higher organic substance concentration than the inflow from outside the system is introduced into the anoxic tank 5 via the pipe j while adjusting the flow rate by the inflow-anoxic tank bypass inflow pump 12. By controlling the flow rate of sewage flowing into the first sedimentation basin 1 by the first sedimentation basin inflow pump 14 while supplying by-pass, the amount of organic substances necessary for the denitrification reaction is supplied to the oxygen-free tank 5 and the amount required for the phosphorus discharge is adjusted. Anaerobic tank 4
To supply. Further, in the device of the conventional example 5, a part of the sewage having a higher organic substance concentration than the inflow from the outside of the system is introduced into the anoxic tank 5 via the pipe j while the flow rate is adjusted by the inflow-anoxic tank bypass inflow pump 12. The amount of organic matter necessary for the denitrification reaction is supplied to the oxygen-free tank 5 by adjusting the flow rate of the sewage flowing into the biological water treatment apparatus with the inflow pump 15 and the amount of organic matter necessary for discharging phosphorus is adjusted. The amount is supplied to the anaerobic tank 4. In the device of the conventional example 6, a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 via the pipe i while the flow rate is adjusted by the initial sedimentation-anoxic tank bypass inflow pump 11. At the same time, the amount of organic matter necessary for the denitrification reaction is supplied to the oxygen-free tank 5 by adjusting the flow rate of the sewage flowing into the first sedimentation basin 1 with the first sedimentation basin inflow pump 14, and the amount of organic matter necessary for the phosphorus discharge is adjusted. Anaerobic tank 4
To supply.

[0019]

Since the conventional biological water treatment apparatus is configured as described above, the operation manager refers to the dissolved oxygen concentration of the sewage in the mixed solution in the biological reaction tank 2 and the like. Then, by controlling the amount of aeration to the biological reaction tank 2, the amount of activated sludge stored in the biological reaction tank 2, the flow rate of the activated sludge returned to the biological reaction tank 2, and the like, it is necessary to secure good treated water quality. However, if the flow rate and properties of the inflow sewage change significantly due to rainfall or the like, there is a problem that it is difficult to always maintain good water quality only by adjusting the operation amount.

The present invention has been made in order to solve the above-mentioned problems, and has been made in consideration of the amount of aeration to the biological reaction tank, the amount of activated sludge stored in the biological reaction tank, the flow rate of the activated sludge returned to the biological reaction tank, and the like. Biological water that can efficiently perform denitrification and phosphorus discharge and ensure good water quality by appropriately adjusting the flow rate of sewage flowing into an anaerobic tank or an anoxic tank other than the operation amount It is an object to obtain a control device for a processing device.

[0021]

A control device for a biological water treatment apparatus according to the present invention sets a denitrification amount detection means for detecting a denitrification amount and a target value of an output value of the denitrification amount detection means. A denitrification target value setting means, and a predetermined amount of the amount of water to be bypassed into the anoxic tank according to the difference between the output value of the denitrification amount detection means and the target value set in the denitrification target value setting means. Anoxic tank inflow water control signal output means for outputting a signal indicating that the inflow of the anoxic tank into the anoxic tank according to the output value of the anoxic tank inflow water control signal output means Adjusting means.

In the control device of the biological water treatment apparatus according to the present invention, the denitrification amount detecting means measures the nitrate nitrogen concentration of the water to be treated in the mixture in the oxygen-free tank. It is provided with.

In the control device of the biological water treatment apparatus according to the present invention, the denitrification amount detecting means includes an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of the water to be treated in the mixed solution in the oxygen-free tank. It consists of

In the control apparatus for a biological water treatment apparatus according to the present invention, the denitrification amount detecting means is configured to determine a nitrate nitrogen concentration of the water to be treated in the mixed solution in the oxygen-free tank and the concentration of the treated water after the activated sludge treatment. It is provided with a calculating means for calculating a difference from the nitrate nitrogen concentration of water.

[0025] In the control device for a biological water treatment apparatus according to the present invention, the arithmetic means includes a nitrate nitrogen concentration meter for measuring a nitrate nitrogen concentration of the water to be treated in the mixture in the oxygen-free tank; And a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the water to be treated after the sludge treatment.

[0026] In the control device for a biological water treatment apparatus according to the present invention, the denitrification amount detecting means includes an estimating means for estimating the nitrate nitrogen concentration of the water to be treated in the mixture in the anoxic tank. It consists of

[0027] The control device of the biological water treatment apparatus according to the present invention, wherein the estimating means includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the water to be treated in the mixed solution in the oxygen-free tank. It consists of

The control device of the biological water treatment apparatus according to the present invention includes an outflow nitrogen amount detecting means for detecting the amount of nitrogen flowing out of the system, and an oxygen-free tank according to an output value of the outflow nitrogen amount detecting means. An anoxic tank inflow water control signal output means for outputting a signal for setting a predetermined amount of bypass inflow water to be treated, and a bypass inflow to the anoxic tank according to an output value of the anoxic tank inflow water control signal output means. An oxygen-free tank inflow water amount adjusting means for adjusting the amount of treated water.

In the control device for a biological water treatment apparatus according to the present invention, the oxygen-free tank inflow water amount adjustment signal output means outputs the output value of the outflow nitrogen amount detection means and the target value of the output value of the outflow nitrogen amount detection means. And outputs a signal in accordance with the difference between the two.

In the control device for a biological water treatment apparatus according to the present invention, the nitrogen outflow detecting means includes a nitrogen concentration meter for measuring the nitrogen concentration of the water to be treated after the activated sludge treatment.

The control device of the biological water treatment apparatus according to the present invention includes an inflow nitrogen amount detection means for detecting an amount of nitrogen flowing from outside the system, and a control device for the oxygen-free tank according to an output value of the inflow nitrogen amount detection means. An anoxic tank inflow water control signal output means for outputting a signal for setting a predetermined amount of bypass inflow water to be treated, and a bypass inflow to the anoxic tank according to an output value of the anoxic tank inflow water control signal output means. An oxygen-free tank inflow water amount adjusting means for adjusting the amount of treated water.

In the control device for a biological water treatment apparatus according to the present invention, the oxygen-free tank inflow water amount adjustment signal output means outputs a signal in accordance with a difference between an output value of the inflow nitrogen amount detection means and a reference value. Is what you do.

In the control device for a biological water treatment apparatus according to the present invention, the inflow nitrogen amount detecting means includes a nitrogen concentration meter for measuring the nitrogen concentration of the water to be treated before the activated sludge treatment.

[0034] The control device of the biological water treatment apparatus according to the present invention comprises: a phosphorus discharge amount detecting means for detecting a phosphorus discharge amount;
A phosphorus discharge target value setting means for setting a target value of an output value of the phosphorus discharge amount detection means, and an anaerobic state corresponding to a difference between an output value of the phosphorus discharge amount detection means and a target value set in the phosphorus discharge target value setting means. An anaerobic tank inflow water control signal output means for outputting a signal for setting a predetermined amount of water to be treated by bypass inflow into the tank; and a bypass inflow to the anaerobic tank in accordance with an output value of the anaerobic tank inflow water control signal output means. An anaerobic tank inflow water amount adjusting means for adjusting the amount of water.

The control device for a biological water treatment apparatus according to the present invention comprises: a phosphorus discharge amount detecting means for detecting a phosphorus discharge amount;
Phosphorus discharge target value setting means for setting a target value of the output value of the phosphorus discharge amount detection means; and a difference between the output value of the phosphorus discharge amount detection means and the target value set in the phosphorus discharge amount target value setting means. Anoxic tank inflow water control signal output means for outputting a signal that sets the amount of water to be treated to be bypassed into the anoxic tank as a predetermined value, and to the anoxic tank according to the output value of the anoxic tank inflow water control signal output means And a means for adjusting the amount of inflow water in the anoxic tank that adjusts the amount of water to be treated by bypass inflow.

[0036] The control device for a biological water treatment apparatus according to the present invention includes a phosphorus discharge amount detecting means for detecting a phosphorus discharge amount,
A phosphorus discharge target value setting means for setting a target value of an output value of the phosphorus discharge amount detection means, and an anaerobic state corresponding to a difference between an output value of the phosphorus discharge amount detection means and a target value set in the phosphorus discharge target value setting means. An anaerobic tank inflow water control signal output means for outputting a signal that sets the inflow water to be treated into the tank to a predetermined value; and an inflow water to the first sedimentation basin according to the output value of the anaerobic tank inflow water control signal output means. And a means for adjusting the amount of inflowing water into the first settling basin.

The control device of the biological water treatment apparatus according to the present invention comprises: an oxygen-free tank inflow water adjustment signal output means for outputting a signal for setting the amount of water to be bypassed into the oxygen-free tank to a predetermined value; Phosphorus discharge amount detection means for detecting the discharge amount,
A phosphorus discharge target value setting means for setting a target value of an output value of the phosphorus discharge amount detection means, and an anaerobic state corresponding to a difference between an output value of the phosphorus discharge amount detection means and a target value set in the phosphorus discharge target value setting means. An anaerobic tank influent water control signal output means for outputting a signal that sets the amount of water to be treated into the tank to a predetermined value; an output value of the anaerobic tank inflow water control signal output means and an output of the anaerobic tank inflow water control signal output means A first settling tank inflow water control signal output means for outputting a signal for setting the amount of water to be treated into the first settling tank to a predetermined value in accordance with the value; The first settling tank is provided with a means for adjusting the amount of inflow water to be set into the settling tank.

[0038] In the control apparatus for a biological water treatment apparatus according to the present invention, the phosphorus discharge amount detecting means includes a phosphoric acid phosphorus concentration meter for measuring the concentration of the phosphoric acid in the water to be treated in the mixed solution in the anaerobic tank. It is provided.

In the control device for a biological water treatment apparatus according to the present invention, the phosphorus discharge amount detecting means includes an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of the water to be treated in the mixed solution in the anaerobic tank. It consists of

In the control apparatus for a biological water treatment apparatus according to the present invention, the phosphorus discharge amount detecting means includes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank. It consists of

In the control apparatus for a biological water treatment apparatus according to the present invention, the phosphorus discharge amount detecting means is configured to determine the concentration of the phosphoric acid phosphorus in the water to be treated in the mixture in the anaerobic tank and the water to be treated before the activated sludge treatment. Calculating means for calculating the difference between the phosphoric acid and the phosphoric acid concentration.

[0042] In the control device for a biological water treatment apparatus according to the present invention, the arithmetic means comprises: a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the water to be treated in the mixture in the anaerobic tank; A phosphoric acid phosphor concentration meter for measuring the phosphoric acid phosphorus concentration of the water to be treated before the treatment.

In the control apparatus for a biological water treatment apparatus according to the present invention, the phosphorus discharge amount detecting means includes an estimating means for estimating the concentration of the phosphoric acid phosphorus in the water to be treated in the mixed solution in the anaerobic tank. Things.

In the control device for a biological water treatment apparatus according to the present invention, the estimating means includes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the water to be treated in the mixed solution in the anaerobic tank. Things.

The control device of the biological water treatment apparatus according to the present invention comprises an outflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing out of the system, and an output to the anaerobic tank according to the output value of the outflowing phosphorus amount detecting means. An anaerobic tank inflow water control signal output means for outputting a signal that sets the bypass inflow water to a predetermined value, and a bypass inflow water to the anaerobic tank in accordance with an output value of the anaerobic tank inflow water control signal output means. And an anaerobic tank inflow water amount adjusting means.

The control device of the biological water treatment apparatus according to the present invention comprises: an outflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing out of the system; and an oxygen-free tank according to the output value of the outflowing phosphorus amount detecting means. An anoxic tank inflow water control signal output means for outputting a signal for setting a predetermined amount of bypass inflow water to be treated, and a bypass inflow to the anoxic tank according to an output value of the anoxic tank inflow water control signal output means. An oxygen-free tank inflow water amount adjusting means for adjusting the amount of treated water.

The control device of the biological water treatment apparatus according to the present invention comprises an outflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing out of the system, and an output from the outflowing phosphorus amount detecting means to the anaerobic tank. An anaerobic tank inflow water control signal output means for outputting a signal that sets the inflow water to be treated to a predetermined value, and the amount of inflow water to the first sedimentation basin is adjusted according to the output value of the anaerobic tank inflow water control signal output means. The first settling basin is provided with a means for adjusting the amount of inflow water.

The control device of the biological water treatment apparatus according to the present invention comprises: an oxygen-free tank inflow water adjustment signal output means for outputting a signal for setting a predetermined value for the amount of water to be bypassed into the anoxic tank; Outflow phosphorus amount detection means for detecting the amount of phosphorus flowing out, and anaerobic tank inflow water amount control for outputting a signal for setting the amount of water to be treated into the anaerobic tank to a predetermined value according to the output value of the outflow phosphorus amount detection means A signal for setting the amount of water to be treated into the first sedimentation basin to a predetermined value according to the output value of the signal output means and the output value of the oxygen-free tank inflow water control signal output means and the output value of the anaerobic tank inflow water control signal output means First sedimentation tank inflow water control signal output means, and first sedimentation tank inflow water amount adjustment means for adjusting the amount of water to be inflowed into the first sedimentation tank according to the output value of the first sedimentation tank inflow water control signal output means. Things.

In the control device for a biological water treatment apparatus according to the present invention, the anaerobic tank inflow water amount adjustment signal output means outputs the output value of the outflow phosphorus amount detection means and the target value of the output value of the outflow phosphorus amount detection means. A signal is output in accordance with the difference between.

In the control device for a biological water treatment apparatus according to the present invention, the oxygen-free tank inflow water amount adjustment signal output means outputs the output value of the outflow phosphorus amount detection means and the target value of the output value of the outflow phosphorus amount detection means. And outputs a signal in accordance with the difference between the two.

In the control device for a biological water treatment apparatus according to the present invention, the outflowing phosphorus amount detecting means includes a phosphorus concentration meter for measuring the phosphorus concentration of the water to be treated after the activated sludge treatment.

The control device of the biological water treatment apparatus according to the present invention includes an inflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing in from outside the system, and a control device for the anaerobic tank according to the output value of the inflowing phosphorus amount detecting means. An anaerobic tank inflow water control signal output means for outputting a signal that sets the bypass inflow water to a predetermined value, and a bypass inflow water to the anaerobic tank in accordance with an output value of the anaerobic tank inflow water control signal output means. And an anaerobic tank inflow water amount adjusting means.

The control apparatus for a biological water treatment apparatus according to the present invention includes an inflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing in from outside the system, and an oxygen-free tank according to an output value of the inflowing phosphorus amount detecting means. An anoxic tank inflow water control signal output means for outputting a signal for setting a predetermined amount of bypass inflow water to be treated, and a bypass inflow to the anoxic tank according to an output value of the anoxic tank inflow water control signal output means. An oxygen-free tank inflow water amount adjusting means for adjusting the amount of treated water.

The control device of the biological water treatment apparatus according to the present invention includes an inflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing in from outside the system, and an inflowing phosphorus amount to the anaerobic tank in accordance with an output value of the inflowing phosphorus amount detecting means. An anaerobic tank inflow water control signal output means for outputting a signal that sets the inflow water to be treated to a predetermined value, and the amount of inflow water to the first sedimentation basin is adjusted according to the output value of the anaerobic tank inflow water control signal output means. The first settling basin is provided with a means for adjusting the amount of inflow water.

The control device of the biological water treatment apparatus according to the present invention comprises: an oxygen-free tank inflow water adjustment signal output means for outputting a signal for setting the amount of water to be bypassed into the oxygen-free tank to be treated to a predetermined value; Inflow phosphorus amount detection means for detecting the amount of phosphorus flowing in from outside, and anaerobic tank inflow water amount adjustment for outputting a signal for setting the amount of water to be treated into the anaerobic tank to a predetermined value according to the output value of the inflow phosphorus amount detection means A signal for setting the amount of water to be treated into the first sedimentation basin to a predetermined value according to the output value of the signal output means and the output value of the oxygen-free tank inflow water control signal output means and the output value of the anaerobic tank inflow water control signal output means First sedimentation tank inflow water control signal output means, and first sedimentation tank inflow water amount adjustment means for adjusting the amount of water to be inflowed into the first sedimentation tank according to the output value of the first sedimentation tank inflow water control signal output means. Things.

In the control apparatus for a biological water treatment apparatus according to the present invention, the anaerobic tank inflow water amount adjustment signal output means outputs a signal according to a difference between an output value of the inflow phosphorus amount detection means and a reference value. Things.

In the control device for a biological water treatment apparatus according to the present invention, the oxygen-free tank inflow water amount adjustment signal output means outputs a signal in accordance with a difference between an output value of the inflow phosphorus amount detection means and a reference value. Is what you do.

In the control device of the biological water treatment apparatus according to the present invention, the inflowing phosphorus amount detecting means includes a phosphorus concentration meter for measuring the phosphorus concentration of the water to be treated before the activated sludge treatment.

The control device of the biological water treatment apparatus according to the present invention includes a correcting means for correcting an output value to the oxygen-free tank inflow water amount adjusting means according to the plant data.

The control device of the biological water treatment apparatus according to the present invention includes a correction means for correcting an output value to the anaerobic tank inflow water amount adjusting means according to the plant data.

[0061] The control device of the biological water treatment apparatus according to the present invention includes a correction means for correcting the output value to the first sedimentation tank inflow water amount adjusting means according to the plant data.

[0062]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 1 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and the flow rate of the sewage flowing into the anoxic tank by bypass. (Hereinafter referred to as the amount of wastewater flowing into the anoxic tank by bypass). In FIG. 1, 1 is a first sedimentation tank for storing sewage, which is water to be treated, flowing from outside the system, 2 is a biological reaction tank for storing microorganisms (activated sludge) containing phosphorus-accumulating bacteria, nitrifying bacteria and denitrifying bacteria, 3 is a biological reactor. This is a final sedimentation basin for separating the mixed solution flowing out of the biological reaction tank 2 into supernatant water and activated sludge, which are sewage after activated sludge treatment.

In the biological reaction tank 2, reference numeral 4 denotes an anaerobic tank which is in an anaerobic state for discharging phosphoric acid phosphorus from the phosphorus accumulating bacteria, and reference numeral 5 denotes an anoxic state in which denitrification is performed by denitrifying bacteria. The oxygen tank 6 is an aerobic tank that is in an aerobic state to allow phosphorus accumulating bacteria to take in phosphoric acid phosphorus and to perform a nitrification reaction by nitrifying bacteria. Reference numeral 7 denotes an aeration tank for supplying air to the aerobic tank 6.

Further, a is a pipe connected to the first sedimentation basin 1 for flowing sewage flowing from outside the system into the first sedimentation basin 1, and b is a sewage flowing out of the first sedimentation basin 1 for the biological reaction tank 2.
A pipe connected to the first sedimentation basin 1 and the anaerobic tank 4 to flow into the sedimentation basin 3 and the aerobic tank 6 and the final sedimentation basin 3 for flowing the mixed solution flowing out of the biological reaction tank 2 into the final sedimentation basin 3. A pipe connected to the final sedimentation basin 3 for discharging the supernatant water separated in the final sedimentation basin 3 out of the system;
e is a pipe connected to the aerobic tank 6 and the anoxic tank 5 for circulating the mixed liquid in the aerobic tank 6 to the anoxic tank 5, and f is the activated sludge separated in the final sedimentation tank 3. A pipe connected to the bottom of the final sedimentation basin 3 for taking out from the sedimentation basin 3 is connected to the pipe f and the anaerobic tank 4 for returning the activated sludge taken out from the final sedimentation basin 3 to the biological reaction tank 2. H, a pipe connected to a pipe f for discharging an excess of activated sludge taken out of the final sedimentation tank 3 to the outside of the system, and j: a part of an anaerobic tank for sewage flowing from outside the system. 5 is a pipe connected to the pipe a and the anoxic tank 5 to flow into the bypass 5.

Reference numeral 8 denotes a circulating pump provided in a pipe e for adjusting the flow rate of the mixed solution circulating in the oxygen-free tank 5,
Reference numeral 9 denotes a return pump provided on the pipe g for adjusting the flow rate of the activated sludge returned to the biological reaction tank 2, and reference numeral 10 denotes a discharge pump provided on the pipe h for controlling the flow rate of the activated sludge discharged outside the system. The pump 12 is an inlet provided in the pipe j for adjusting the flow rate of sewage flowing into the anoxic tank 5 by bypass.
An anoxic tank bypass inflow pump (anoxic tank inflow water amount adjusting means).

Reference numeral 43 denotes a nitrate nitrogen concentration meter (means for detecting the amount of denitrification) for measuring the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank 5. Reference numeral 31 denotes a target value of the nitrate nitrogen concentration. A setter (a denitrification target value setting means) 21 sets a bypass inflow sewage amount into the anoxic tank 5 according to a difference between a measured value of the nitrate nitrogen concentration meter 43 and a target value set in the setter 31. Inflow of a signal having a predetermined value-anoxic tank bypass inflow pump 12
(An anoxic tank inflow water amount adjustment signal output means). The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5. The controller 21 includes a nitrate nitrogen concentration meter 43 via a signal line 43a and a setting device 3 via a signal line 31a.
1 and an inflow-anoxic-tank bypass inflow pump 12 via a signal line 21a.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 determines the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to the following equation (1.1). Is output. _{Q ano = Q ano0 + K ano1} (C NO3_ano -C NO3_ano *) (1.1) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _ANO1: constant (> 0) C _{NO3_ano} ^* : Target value of nitrate nitrogen concentration of sewage in mixed solution in anoxic tank 5 C _{NO3_ano} : Measured value of nitrate nitrogen concentration of sewage in mixed solution in anoxic tank 5 Output of controller 21 is signal It is communicated to the inflow-anoxic tank bypass inflow pump 12 via line 21a.

From the above, the measured value of the nitrate nitrogen concentration C
If is greater than the target value C _{NO3_ano} ^* _{NO3_ano,} bypass inlet sewage quantity Q _ano to anoxic tank 5 is increased, organic feed to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value C _{NO3_ano} of the nitrate nitrogen concentration is smaller than the target value C _{NO3_ano} ^{*, the} amount Q _{ano of} sewage bypassed into the anoxic tank 5 decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. I do. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the first embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.

Embodiment 2 FIG. 2 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 2 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. In FIG. 2, i is a pipe connected to the pipe b and the anaerobic tank 5 so that a part of the sewage flowing out of the sedimentation tank 1 first flows into the anaerobic tank 5, and 11 is a bypass connected to the anaerobic tank 5. This is a primary sedimentation-anoxic tank bypass inflow pump (oxygen-free tank inflow water amount adjusting means) provided in the pipe i for adjusting the flow rate of sewage flowing into the tank.

Reference numeral 43 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank 5.
Is a setter for setting the target value of the nitrate nitrogen concentration, 21 is a bypass set to the anoxic tank 5 according to the difference between the measured value of the nitrate nitrogen concentration meter 43 and the target value set in the setter 31. This is a controller for outputting a signal for setting the water amount to a predetermined value to the initial sink-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5. The controller 21
The nitrate nitrogen concentration meter 43 is connected via a signal line 43a, the setting device 31 via a signal line 31a, and the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 21a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
To the initial sink-anoxic tank bypass inflow pump 11.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the second embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the substrate is adjusted, the same effect as in the first embodiment can be obtained. According to the second embodiment, a part of the sewage flowing out of the sedimentation basin 1 is first removed from the anaerobic tank 5.
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 3 FIG. 3 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 3 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above. In FIG. 3, reference numeral 53 denotes an oxidation-reduction potentiometer (meaning means for detecting the amount of denitrification) for measuring the oxidation-reduction potential of sewage in the mixed solution in the anoxic tank 5;
Reference numeral 32 denotes a setter for setting a target value of the oxidation-reduction potential (a denitrification target value setting means), and reference numeral 22 denotes anoxic oxygen according to the difference between the measured value of the oxidation-reduction potential meter 53 and the target value set in the setter 32. A controller (an anoxic tank inflow water amount adjustment signal output means) that outputs a signal that sets a predetermined value to the amount of bypass inflow sewage into the tank 5 to the inflow-anoxic tank bypass inflow pump 12. The oxidation-reduction potentiometer 53 is provided in the oxygen-free tank 5. The controller 22 includes an oxidation-reduction potentiometer 53 via a signal line 53a,
The setting device 32 is connected to the inflow-anoxic-tank bypass inflow pump 12 via the signal line 32a and the signal line 22a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured using an oxidation-reduction potentiometer 5.
3, and the measured value is sent to the controller 2 via the signal line 53a.
It is conveyed to 2. Further, the target value set in the setting device 32 is transmitted to the controller 22 via the signal line 32a. The controller 22 determines the bypass inflow sewage amount into the anoxic tank 5 according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value with a value obtained according to, for example, the following equation (2.1). Output a signal. Q _ano = Q _ano0 + K _ano2 (V _ano −V _ano ^* ) (2.1) where, Q _ano : the amount of sewage that flows into the anoxic tank 5 by bypass Q _ano0 : constant K _ano2 : constant (> 0) V _ano ^* : Target value of the oxidation-reduction potential of the sewage in the mixture in the anoxic tank 5 V _ano : Measured value of the oxidation-reduction potential of the sewage in the mixture in the anoxic tank 5 The output of the controller 22 is a signal line 22a. Through the inflow-anoxic-tank bypass inflow pump 12.

From the above, if the measured value V _ano of the oxidation-reduction potential is larger than the target value V _ano ^{*, the} amount of _waste water Q _ano flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 Increase. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, the measured value V of the oxidation-reduction potential
_{If ano} is smaller than the target value V _ano ^* , the bypass inflow sewage Q _ano into the anoxic tank 5 decreases, and the organic matter supply to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the third embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass 5 into the anoxic tank 5, the amount of nitrogen flowing out of the system can be reduced even if the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect that can be reliably reduced is obtained.

Embodiment 4 FIG. 4 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 4 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above. In FIG. 4, 53 is an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5, 32 is a setting device for setting a target value of the oxidation-reduction potential, and 22 is an oxidation-reduction potentiometer 53
Is output to the initial settling-anoxic-tank bypass inflow pump 11 in accordance with the difference between the measured value and the target value set in the setting device 32. It is a regulator. The oxidation-reduction potentiometer 53 is provided in the oxygen-free tank 5. The controller 22 includes an oxidation-reduction potentiometer 53 via a signal line 53a and a setting unit 3 via a signal line 32a.
2 and a signal line 22a and connected to the initial settling-anoxic tank bypass inflow pump 11. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured using an oxidation-reduction potentiometer 5.
3, and the measured value is sent to the controller 2 via the signal line 53a.
It is conveyed to 2. Further, the target value set in the setting device 32 is transmitted to the controller 22 via the signal line 32a. The controller 22 sets a signal that sets the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the oxidation-reduction potential and a predetermined target value, for example, according to the equation (2.1). Is output. The output of the controller 22 is transmitted to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 22a.

As described above, if the measured value of the oxidation-reduction potential is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the oxidation-reduction potential is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the fourth embodiment, the oxidation-reduction potential of the sewage in the mixed liquid in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the bypass 5, the same effect as in the third embodiment can be obtained. According to the fourth embodiment,
Since a part of the sewage flowing out of the first sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and the load of the initial sedimentation-anoxic tank bypass inflow pump 11 is reduced. Is obtained.

Embodiment 5 FIG. 5 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 5 of the present invention. In this embodiment, as a means for detecting the amount of denitrification, the difference between the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank and the concentration of nitrate nitrogen in the effluent that is sewage after activated sludge treatment is calculated. And a device configured to adjust the amount of sewage flowing into the anoxic tank by bypass. In FIG. 5, reference numeral 43 denotes a nitrate nitrogen concentration meter (denitrification amount detection means, which measures the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank 5).
Calculation means), 46 is a nitrate nitrogen concentration meter (denitrification amount detection means, calculation means) for measuring the nitrate nitrogen concentration of the discharge water, 81
Is a calculator for calculating the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank 5 and the concentration of nitrate nitrogen in the effluent (denitrification amount detection means, calculation means); A setting device (target for setting denitrification target value) for setting a target value of a difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent in the mixed solution in the tank;
Reference numeral 23 denotes an inflow-oxygen-free tank bypass inflow pump which receives a signal for setting the bypass inflow sewage amount to the anoxic tank 5 to a predetermined value in accordance with the difference between the calculated value of the calculator 81 and the target value set in the setting unit 33. 12 (an anoxic tank inflow water amount adjustment signal output means). The nitrate nitrogen concentration meter 43 is used in the oxygen-free tank 5
The nitrate nitrogen concentration meter 46 is provided in the pipe d. The calculator 81 is connected to the nitrate nitrogen concentration meter 43 via a signal line 43a and to the nitrate nitrogen concentration meter 46 via a signal line 46a. The controller 23 includes a signal line 81
The arithmetic unit 81 is connected to the setting unit 33 via the signal line 33a, and the inflow-anoxic-tank bypass inflow pump 12 via the signal line 23a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured by the nitrate nitrogen concentration meter 43, and the measured value is transmitted to the calculator 81 via the signal line 43a. The nitrate nitrogen concentration of the discharge water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the calculator 81 via the signal line 46a. The calculator 81 calculates the difference between the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the discharge water according to, for example, the following equation (3.1). D _{NO3_ano} = C _{NO3_out} -C _{NO3_ano} (3.1) where D _{NO3_ano is} the calculated value of the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixture in the anoxic tank 5. _{NO3_out} : Nitrate nitrogen concentration of _effluent C _{NO3_ano} : Nitrate nitrogen concentration of sewage in mixed solution in anoxic tank 5

The operation value of operation unit 81 is transmitted to controller 23 via signal line 81a. Further, the target value set in the setting device 33 is transmitted to the controller 23 via the signal line 33a. The controller 23 calculates the difference between the calculated value of the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank 5 and the concentration of nitrate nitrogen in the effluent, and a predetermined target value. For example, the amount of sewage flowing into the anoxic tank 5 by inflow into the anoxic tank 5 is described below (3.2)
A signal having a value obtained according to the equation is output. _{Q ano = Q ano0 + K ano3} (D NO3_ano -D NO3_ano *) (3.2) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano3: constant (<0) D _{NO3_ano} ^* : Target value of the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank 5 and the concentration of nitrate nitrogen in the effluent D _{NO3_ano} : nitrate nitrogen in the mixture in the anoxic tank 5 The calculated value of the difference between the concentration and the concentration of nitrate nitrogen in the effluent is output from the controller 23 to the inflow-anoxic-tank bypass inflow pump 12 via a signal line 23a.

From the above, if the calculated value D _{NO3_ano} of the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank 5 and the concentration of nitrate nitrogen in the _effluent is smaller than the target value D _{NO3_ano} ^* ,
The bypass inflow sewage _Qano to the anoxic tank 5 increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, the calculated value D _{NO3_ano} of the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank 5 and the concentration of nitrate nitrogen in the _effluent is the target value D.
Greater than _{NO3_ano} ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is reduced, organic feed to anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the fifth embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the discharge water in the mixed solution in the oxygen-free tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained.

Embodiment 6 FIG. 6 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 6 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to regulate the amount of sewage flowing into the bypass. In FIG. 6, reference numeral 43 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank 5; 46, a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the discharged water; Is a calculator for calculating the difference between the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank 5 and the concentration of nitrate nitrogen in the effluent of the effluent. A setting device 23 for setting a target value of the difference between the nitrogen concentration and the nitrate nitrogen concentration of the effluent, and an oxygen-free tank 5 according to the difference between the calculated value of the calculator 81 and the target value set in the setting device 33. This is a controller for outputting a signal for setting the amount of sewage flowing into the bypass to the predetermined value to the initial sink-anoxic tank bypass inflow pump 11.
The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5, and the nitrate nitrogen concentration meter 46 is provided in the pipe d. Arithmetic unit 8
1 is a nitrate nitrogen concentration meter 43 via a signal line 43a;
It is connected to a nitrate nitrogen concentration meter 46 via a signal line 46a. The controller 23 is connected to the arithmetic unit 8 via the signal line 81a.
1, the setting unit 33 via the signal line 33a, and the signal line 23
It is connected to the initial settling-oxygen-free tank bypass inflow pump 11 through a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured by the nitrate nitrogen concentration meter 43, and the measured value is transmitted to the calculator 81 via the signal line 43a. The nitrate nitrogen concentration of the discharge water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the calculator 81 via the signal line 46a. The calculator 81 calculates the difference between the nitrate nitrogen concentration of the mixture in the anoxic tank 5 and the nitrate nitrogen concentration of the discharge water according to, for example, equation (3.1).

The calculated value of the calculator 81 is transmitted to the controller 23 via the signal line 81a. Further, the target value set in the setting device 33 is transmitted to the controller 23 via the signal line 33a. The controller 23 calculates the difference between the calculated value of the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank 5 and the concentration of nitrate nitrogen in the effluent, and a predetermined target value. A signal is output to set the amount of sewage flowing into the anoxic tank 5 to a value obtained, for example, according to the equation (3.2). The output of the controller 23 is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via a signal line 23a.

As described above, if the calculated value of the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent in the mixture in the oxygen-free tank 5 is smaller than the target value, The amount of sewage flowing into the bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the calculated value of the difference between the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank 5 and the concentration of nitrate nitrogen in the effluent is larger than the target value, the flow into the anoxic tank 5 is reduced. The amount of water decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the sixth embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic substances supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. The effect is obtained. Further, according to the sixth embodiment, a part of the sewage flowing out of the sedimentation basin 1 first flows into the anaerobic tank 5 by bypass.
Low S component, initial settling-anoxic tank bypass inflow pump 1
1 can reduce the load.

Embodiment 7 FIG. FIG. 7 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 7 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. In FIG.
Reference numeral 43 denotes a nitrate nitrogen concentration meter (meaning means for denitrification amount and estimation means) for measuring the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank 5, and 31 denotes a setting for setting a target value of the nitrate nitrogen concentration. A storage circuit (storage means for denitrification amount detection means, estimation means) for storing data of the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank 5, and a storage circuit 71 for the nitrate nitrogen stored in the storage circuit 71 An arithmetic unit (denitrification amount detecting means, estimating means) 21 for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank 5 using the concentration data; The controller outputs to the inflow-anoxic-tank bypass inflow pump 12 a signal for setting the amount of sewage in the bypass-into the anoxic tank 5 to a predetermined value in accordance with the difference from the target value set in (1). The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5. The storage circuit 71 stores the nitrate nitrogen concentration meter 43 via the signal line 43a.
Is connected to The arithmetic unit 82 is connected to the storage circuit 71 via the signal line 71a. The controller 21 is connected to the arithmetic unit 82 via a signal line 82a, the setting unit 31 via a signal line 31a, and the inflow-anoxic-tank bypass inflow pump 12 via a signal line 21a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by the nitrate nitrogen concentration meter 43, and the measured value is transmitted to the storage circuit 71 via the signal line 43a. The arithmetic unit 82 estimates the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 at an arbitrary time using the nitrate nitrogen concentration data stored in the storage circuit 71. This can be easily performed using a statistical analysis method such as the least square method. Nitrate nitrogen concentration data required for analysis is transmitted from the storage circuit 71 via the signal line 71a. The estimated value of the arithmetic unit 82 is transmitted to the controller 21 via the signal line 82a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 obtains the amount of sewage flowing into the anoxic tank 5 by bypass according to a difference between the estimated value of the nitrate nitrogen concentration and a predetermined target value, for example, according to a formula similar to the formula (1.1). A signal having a value to be output is output. The output of the regulator 21 is transmitted to the inflow-anoxic-tank bypass inflow pump 12 via a signal line 21a.

As described above, when the estimated value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the estimated value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the seventh embodiment, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. According to the seventh embodiment, the nitrate nitrogen concentration in the sewage in the mixture in the anoxic tank 5 is estimated using the accumulated nitrate nitrogen concentration data. However, even when a long time is required, the effect of quickly adjusting the amount of organic substances supplied to the oxygen-free tank 5 can be obtained.

Embodiment 8 FIG. FIG. 8 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 8 of the present invention. The present embodiment is provided with a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the anoxic tank by bypass. The device is configured as follows. In FIG. 8, reference numeral 43 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank 5, 31 denotes a setting device for setting a target value of the nitrate nitrogen concentration, and 71 denotes anoxic nitrogen. A storage circuit 82 stores data of the concentration of nitrate nitrogen in the sewage in the mixed solution in the tank 5, and a storage circuit 82 uses the data of the concentration of nitrate nitrogen stored in the storage circuit 71 to store the data in the mixed solution in the anoxic tank 5. An arithmetic unit for estimating the concentration of nitrate nitrogen in the sewage, 21 sets a predetermined amount of sewage flowing into the anoxic tank 5 in accordance with a difference between the estimated value of the arithmetic unit 82 and the target value set in the setting unit 31. Is output to the initial settling-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5. The storage circuit 71 is connected to the nitrate nitrogen concentration meter 43 via the signal line 43a. The arithmetic unit 82
The memory circuit 71 is connected via a signal line 71a.
The controller 21 is connected to the computing unit 82 via a signal line 82a, the setting unit 31 via a signal line 31a, and the initial sink-anoxic tank bypass inflow pump 11 via a signal line 21a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by the nitrate nitrogen concentration meter 43, and the measured value is transmitted to the storage circuit 71 via the signal line 43a. The arithmetic unit 82 estimates the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 at an arbitrary time using the nitrate nitrogen concentration data stored in the storage circuit 71. This can be easily performed using a statistical analysis method such as the least square method. Nitrate nitrogen concentration data required for analysis is transmitted from the storage circuit 71 via the signal line 71a. The estimated value of the arithmetic unit 82 is transmitted to the controller 21 via the signal line 82a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 obtains the amount of sewage flowing into the anoxic tank 5 by bypass according to a difference between the estimated value of the nitrate nitrogen concentration and a predetermined target value, for example, according to a formula similar to the formula (1.1). A signal having a value to be output is output. The output of the controller 21 is transmitted to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 21a.

As described above, if the estimated value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the estimated value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the eighth embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, the same effect as in the seventh embodiment can be obtained. In addition, this Embodiment 8
According to the method, a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, so that the SS component in the bypass flow to the anaerobic tank 5 is small, and The effect of reducing the load on the pump 11 is obtained. According to the eighth embodiment, the nitrate nitrogen concentration in the sewage in the mixture in the anoxic tank 5 is estimated using the accumulated nitrate nitrogen concentration data. However, even when a long time is required, the effect of quickly adjusting the amount of organic substances supplied to the oxygen-free tank 5 can be obtained.

Embodiment 9 FIG. FIG. 9 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 9 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows. In FIG. 9, reference numeral 46 denotes a nitrate nitrogen concentration meter (denitrification amount detection means, nitrogen concentration meter) for measuring the nitrate nitrogen concentration of the effluent, reference numeral 34 denotes a setter for setting a target value of the nitrate nitrogen concentration, and reference numeral 24 denotes In accordance with the difference between the measured value of the nitrate nitrogen concentration meter 46 and the target value of the nitrate nitrogen concentration set in the setting device 34, a signal for setting the amount of sewage by-pass into the anoxic tank 5 to a predetermined value is supplied. It is a controller (anoxic tank inflow water amount adjustment signal output means) that outputs to the anoxic tank bypass inflow pump 12. The nitrate nitrogen concentration meter 46 is provided on the pipe d. The controller 24 includes a nitrate nitrogen concentration meter 46 via a signal line 46a and a signal line 34a.
Is connected to the inflow-anoxic-tank bypass flow pump 12 via the signal line 24a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 1, and thus detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the effluent is measured by a nitrate nitrogen concentration meter 46, and the measured value is transmitted to the controller 24 via a signal line 46a. Further, the target value set in the setting device 34 is transmitted to the controller 24 via the signal line 34a. The controller 24 determines the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to the following equation (4.1). Is output. _{Q ano = Q ano0 + K ano4} (C NO3_out -C NO3_out *) (4.1) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano4: constant (> 0) C _{NO3_out} ^* : Target value of the concentration of nitrate nitrogen in the _effluent C _{NO3_out} : Measured value of the concentration of nitrate nitrogen in the _effluent The output of the controller 24 is transmitted to the inflow-anoxic tank bypass inflow pump 12 via a signal line 24a.

From the above, the measured value of the nitrate nitrogen concentration C
If is greater than the target value C _{NO3_out} ^* _{NO3_out,} bypass inlet sewage quantity Q _ano to anoxic tank 5 is increased, organic feed to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value C _{NO3_out} of the nitrate nitrogen concentration is smaller than the target value C _{NO3_out} ^{*, the} amount Q _{ano of} sewage bypassed into the anoxic tank 5 decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. I do. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the ninth embodiment, the nitrate nitrogen concentration of the discharge water is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from the predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. .

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 10 FIG. FIG. 10 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 10 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
In FIG. 10, reference numeral 46 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent, reference numeral 34 denotes a setting device for setting a target value of the concentration of nitrate nitrogen, and reference numeral 24 denotes the measurement value of the nitrate nitrogen concentration meter 46. This is a controller which outputs a signal for setting the amount of sewage sewage into the anoxic tank 5 to a predetermined value in accordance with the difference from the target value set in the device 34 to the initial sink-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 46 is provided on the pipe d. The controller 24 is connected to the nitrate nitrogen concentration meter 46 via a signal line 46a, the setting device 34 via a signal line 34a, and the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 24a. I have. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the effluent is measured by a nitrate nitrogen concentration meter 46, and the measured value is transmitted to the controller 24 via a signal line 46a. Further, the target value set in the setting device 34 is transmitted to the controller 24 via the signal line 34a. The controller 24 adjusts the amount of sewage that flows into the anoxic tank 5 by bypass, for example, according to the difference between the measured value of the nitrate nitrogen concentration and the predetermined target value (4.
1) A signal having a value obtained according to the equation is output. The output of the controller 24 is transmitted to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 24a.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the tenth embodiment, the concentration of the nitrate nitrogen in the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of the organic substance supplied to the anoxic tank 5 is adjusted by adjusting, the same effect as in the ninth embodiment can be obtained. According to the tenth embodiment, a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass. The effect of reducing the load on the settling-anoxic tank bypass inflow pump 11 can be obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 11 FIG. FIG. 11 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 11 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
In FIG. 11, reference numeral 46 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent, and reference numeral 25 denotes a predetermined value of the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the measurement value of the nitrate nitrogen concentration meter 46. (An anoxic tank inflow water adjustment signal output means). The nitrate nitrogen concentration meter 46 is provided on the pipe d. The controller 25 is connected to the nitrate nitrogen concentration meter 46 via a signal line 46a and to the inflow-anoxic tank bypass inflow pump 12 via a signal line 25a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the effluent is measured by a nitrate nitrogen concentration meter 46, and the measured value is transmitted to the controller 25 via a signal line 46a. The controller 25 determines the amount of sewage that flows into the anoxic tank 5 by bypass, for example, according to the following formula (5.
1) A signal having a value obtained according to the equation is output. Q _ano = Q _ano0 + K _ano5 C _{NO3_out} (5.1) Here, Q _ano : The amount of sewage flowing into the anoxic tank 5 by bypass Q _ano0 : Constant K _ano5 : Constant (> 0) C _{NO3_out} : Nitrate of _effluent The measured value of the nitrogen concentration The output of the controller 25 is transmitted to the inflow-oxygen-free tank bypass inflow pump 12 via a signal line 25a.

From the above, the measured value of the nitrate nitrogen concentration C
_{NO3_out} depending on whether how large, the bypass inlet sewage quantity Q _ano to anoxic tank 5 increases or decreases, organic feed to the anoxic tank 5 increases or decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the eleventh embodiment, the concentration of nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 12 FIG. FIG. 12 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 12 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
In FIG. 12, reference numeral 46 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the discharge water, and reference numeral 25 denotes a predetermined value of the amount of sewage bypassed into the anoxic tank 5 according to the measurement value of the nitrate nitrogen concentration meter 46. Is output to the initial settling-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 46 is provided on the pipe d. The controller 25 includes a signal line 46a.
Is connected to the nitrate nitrogen concentration meter 46 via the signal line 25a and the primary sedimentation-anoxic tank bypass inflow pump 11 via the signal line 25a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the effluent is measured by a nitrate nitrogen concentration meter 46, and the measured value is transmitted to the controller 25 via a signal line 46a. The controller 25 outputs a signal that sets the bypass inflow sewage amount to the anoxic tank 5 to a value obtained, for example, according to the expression (5.1) according to the measured value of the nitrate nitrogen concentration. The output of the controller 25 is transmitted to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 25a.

As described above, depending on how large the measured value of the nitrate nitrogen concentration is, the amount of sewage flowing into the anoxic tank 5 by the bypass increases and decreases, and the amount of organic matter supplied to the anoxic tank 5 increases and decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the twelfth embodiment, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
The same effect as in the eleventh embodiment can be obtained. Further, according to the twelfth embodiment, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component in the bypass flow to the anoxic tank 5 is small. The effect of reducing the load on the settling-anoxic tank bypass inflow pump 11 can be obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 13 FIG. FIG. 13 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 13 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank that is sewage before activated sludge treatment as means for detecting the amount of nitrogen flowing from outside the system. The device is configured to regulate the amount of sewage flowing into the tank by bypass. In FIG. 13, reference numeral 61 denotes a total nitrogen concentration meter (inflow nitrogen detection means, nitrogen concentration meter) for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2, and reference numeral 36 denotes a target value of the total nitrogen concentration of the discharge water. The setting device 26 performs a flow of a signal for setting the amount of sewage bypassed into the anoxic tank 5 to a predetermined value according to the difference between the measured value of the total nitrogen concentration meter 61 and the target value set in the setting device 36. It is a controller (anoxic tank inflow water amount adjustment signal output means) that outputs to the anoxic tank bypass inflow pump 12. The total nitrogen concentration meter 61 is provided on the pipe b. The controller 26 is connected to the total nitrogen concentration meter 61 via a signal line 61a, the setting unit 36 via a signal line 36a, and the inflow-oxygen-free tank bypass inflow pump 12 via a signal line 26a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 1, and thus detailed description thereof will be omitted.

Next, the operation will be described. Biological reaction tank 2
Is measured by a total nitrogen concentration meter 61, and the measured value is transmitted to the controller 26 via a signal line 61a. Further, the target value set in the setting device 36 is transmitted to the controller 26 via a signal line 36a. Controller 2
Reference numeral 6 denotes a signal for setting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the total nitrogen concentration and a predetermined target value, for example, according to the following equation (6.1). Is output. Q _ano = Q _ano0 + K _ano6 (C _{TN_in} −C _{TN_out} ^* ) (6.1) Here, Q _ano : the amount of sewage flowing into the anoxic tank 5 by bypass Q _ano0 : constant K _ano6 : constant (> 0) C _{TN_out} ^* : Target value of the total nitrogen concentration of the _effluent C _{TN_in} : Measured value of the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 The output of the controller 26 flows in via a signal line 26a—the oxygen-free tank bypass inflow pump 12 Conveyed to.

As described above, depending on how much the measured value C _{TN_in} of the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is larger than the target value C _{TN_out} ^* of the total nitrogen concentration of the effluent, The bypass inflow sewage _Qano increases and decreases, and the organic matter supply to the anoxic tank 5 increases and decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the thirteenth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 14 FIG. FIG. 14 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 14 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. In FIG. 14, reference numeral 61 denotes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2;
Is a setting device for setting the target value of the total nitrogen concentration of the effluent, 26
A signal for setting a predetermined value for the amount of sewage flowing into the anoxic tank 5 according to the difference between the measured value of the total nitrogen concentration meter 61 and the target value set in the setting device 36 is initially settled-anoxic tank bypass. This is a controller for outputting to the inflow pump 11. Total nitrogen concentration meter 61
Is provided in the pipe b. The controller 26 includes a signal line 61
is connected to the total nitrogen concentration meter 61 via a, the setting device 36 via a signal line 36a, and the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 26a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Biological reaction tank 2
Is measured by a total nitrogen concentration meter 61, and the measured value is transmitted to the controller 26 via a signal line 61a. Further, the target value set in the setting device 36 is transmitted to the controller 26 via a signal line 36a. Controller 2
6 outputs a signal that sets the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the total nitrogen concentration and a predetermined target value, for example, according to equation (6.1). I do. The output of the controller 26 is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via a signal line 26a.

As described above, depending on how much the measured value of the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is larger than the target value of the total nitrogen concentration of the effluent, the amount of the sewage flowing into the anoxic tank 5 by the bypass is determined. The amount of organic matter supplied to the oxygen-free tank 5 increases or decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the fourteenth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
The same effect as in the thirteenth embodiment can be obtained. Further, according to the fourteenth embodiment, since a part of the sewage flowing out of the sedimentation basin 1 initially flows into the anoxic tank 5 by bypass, the SS component in the bypass flow to the anoxic tank 5 is small, and The effect of reducing the load of the sink-anoxic tank bypass inflow pump 11 can be obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured.

Embodiment 15 FIG. FIG. 15 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 15 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. In FIG. 15, reference numeral 61 denotes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2;
Is a controller that outputs a signal that sets the amount of sewage bypassed into the anoxic tank 5 to a predetermined value in accordance with the measurement value of the total nitrogen concentration meter 61 to the inflow-anoxic tank bypass inflow pump 12 (anoxic tank inflow amount) Adjustment signal output means). Total nitrogen concentration meter 61
Is provided in the pipe b. The controller 27 includes a signal line 61
The total nitrogen concentration meter 61 is connected to the inflow-oxygen-free tank bypass inflow pump 12 via the signal line 27a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Biological reaction tank 2
Is measured by a total nitrogen concentration meter 61, and the measured value is transmitted to the controller 27 via a signal line 61a. The controller 27 outputs a signal that sets the bypass inflow sewage amount to the anoxic tank 5 to a value obtained according to, for example, the following equation (7.1) according to the measured value of the total nitrogen concentration. Q _ano = Q _ano0 + K _ano7 C _{TN_in} (7.1) where, Q _ano : the amount of sewage flowing into the anoxic tank 5 by bypass Q _ano0 : constant K _ano7 : constant (> 0) C _{TN_in} : to the biological reaction tank 2 The measured value of the total nitrogen concentration of the incoming sewage is output to the inflow-oxygen-free tank bypass inflow pump 12 via a signal line 27a.

[0133] From the above, the measurement values C _{TN_in} total nitrogen concentration depending on how much larger, the bypass inlet sewage quantity Q _ano to anoxic tank 5 increases or decreases, organic feed to the anoxic tank 5 is increased or decreased . As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the fifteenth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. .

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured.

Embodiment 16 FIG. FIG. 16 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 16 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2 as means for detecting the amount of nitrogen flowing into the biological water treatment apparatus, and The device is configured to adjust the amount of sewage flowing into the bypass. In FIG. 16, reference numeral 61 denotes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2, and reference numeral 27 denotes a bypass inflow sewage amount to the anoxic tank 5 according to the measurement value of the total nitrogen concentration meter 61. This is a controller for outputting a signal having a predetermined value to the initial sink-anoxic tank bypass inflow pump 11. The total nitrogen concentration meter 61 is provided on the pipe d. The controller 27 is connected to the total nitrogen concentration meter 61 via a signal line 61a and to the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 27a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Biological reaction tank 2
Is measured by a total nitrogen concentration meter 61, and the measured value is transmitted to the controller 27 via a signal line 61a. The controller 27 determines, for example, (7.
1) A signal having a value obtained according to the equation is output. The output of the controller 27 is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via a signal line 27a.

As described above, depending on how large the measured value of the total nitrogen concentration is, the amount of sewage flowing into the anoxic tank 5 by the bypass increases and decreases, and the amount of organic matter supplied to the anoxic tank 5 increases and decreases.
As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the sixteenth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of the organic substance supplied to the anoxic tank 5 is adjusted by adjusting, the same effect as in the fifteenth embodiment can be obtained. Further, according to the sixteenth embodiment, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, the SS component in the bypass flow to the anaerobic tank 5 is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 17 FIG. FIG. 17 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 17 of the present invention. The present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and the flow rate of the sewage (hereinafter referred to as the by-pass flow into the anaerobic tank). , The amount of wastewater flowing into the anaerobic tank by bypass). In FIG. 17, k is a pipe connected to the pipe a and the anaerobic tank 4 for bypassing a part of the sewage flowing from outside the system into the anaerobic tank 4, and 13 is a flow rate of the sewage bypass flowing into the anaerobic tank 4. Is an inflow-anaerobic tank bypass inflow pump (anaerobic tank inflow water amount adjusting means) provided in the pipe k to adjust the pressure.

Further, reference numeral 142 denotes a phosphoric acid phosphorus concentration meter (phosphorus discharge amount detecting means) for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4, and 131 sets a target value of the concentration of phosphoric acid phosphorus. Setter (phosphor discharge target value setting means),
Reference numeral 121 denotes the measured value of the phosphoric acid phosphorus concentration meter 142 and the setting device 1
A controller (an anaerobic tank inflow water amount adjustment signal) that outputs to the inflow-anaerobic tank bypass inflow pump 13 a signal that sets the bypass inflow sewage amount to the anaerobic tank 4 to a predetermined value in accordance with the difference from the target value set in 31. Output means). Phosphoric acid concentration meter 1
Reference numeral 42 is provided in the anaerobic tank 4. The controller 121 is
A phosphoric acid phosphorus concentration meter 142 via a signal line 142a;
The setting device 131 and the signal line 121 are connected via the signal line 131a.
a is connected to the inflow-anaerobic tank bypass inflow pump 13 via a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the controller 121 via a signal line 142a. The target value set in the setting device 131 is transmitted to the controller 12 via the signal line 131a.
It is conveyed to 1. The controller 121 sets the bypass inflow sewage amount to the anaerobic tank 4 to a value obtained according to, for example, the following equation (8.1) according to a difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Output a signal. _{Q ana = Q ana0 + K ana1} (C PO4_ana -C PO4_ana *) (8.1) where, Q _ana: bypass inlet sewage quantity Q to the anaerobic tank ₄ ana0: constant K _ANA1: constant (<0) C _{PO4_ana} ^* ： Target value of phosphoric acid phosphorus concentration of sewage in mixed liquid in anaerobic tank 4 C _{PO4_ana} ： Measured value of phosphoric acid phosphorus concentration of sewage in mixed liquid in anaerobic tank 4 The output of controller 121 is signal line 121a. Through the inflow-anaerobic tank bypass inflow pump 13.

From the above, the measured value C of the phosphoric acid phosphorus concentration was obtained.
If _{PO4_ana} is smaller than the target value C _{PO4_ana} ^*, bypass inlet sewage quantity Q _ana to the anaerobic tank 4 increases, organic feed to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value C _{PO4_ana} phosphorus phosphorus acid concentration is greater than the target value C _{PO4_ana} ^*, bypass inlet sewage quantity Q _ana to the anaerobic tank 4 decreases,
The supply amount of the organic matter to the anaerobic tank 4 is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the seventeenth embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the anaerobic tank 4 is measured in accordance with a difference from a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 by adjusting the amount of sewage that flows into the anaerobic tank 4, the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus flowing out can be obtained.

Embodiment 18 FIG. FIG. 18 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 18 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anaerobic tank as a means for detecting the amount of phosphorus discharged, so as to adjust the amount of sewage bypassed into the anaerobic tank. This is a device configuration.
In FIG. 18, reference numeral 152 denotes an oxidation-reduction potentiometer (phosphorus discharge amount detecting means) for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, and 132 a setting device (phosphorus) for setting a target value of the oxidation-reduction potential. The discharge target value setting means) 122 receives a signal for setting the amount of sewage bypassed into the anaerobic tank 4 to a predetermined value according to the difference between the measurement value of the oxidation-reduction potentiometer 152 and the target value set in the setting device 132. Inflow-Anaerobic tank bypass inflow pump 1
3 (an anaerobic tank inflow water amount adjustment signal output means). The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The controller 122 is connected to the oxidation-reduction potentiometer 152 via the signal line 152a, the setting device 132 via the signal line 132a, and the inflow-anaerobic tank bypass inflow pump 13 via the signal line 122a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. The oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured using an oxidation-reduction potentiometer 15.
2, and the measured value is transmitted to the controller 122 via the signal line 152a. The target value set in the setting device 132 is transmitted to the controller 122 via the signal line 132a. The controller 122 sets the bypass inflow sewage amount to the anaerobic tank 4 to a value obtained, for example, according to the following equation (9.1) according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. Output a signal. Q _ana = Q _ana0 + K _ana2 (V _ana −V _ana ^* ) (9.1) Here, Q _ana : the amount of sewage flowing into the anaerobic tank 4 by bypass Q _ana0 : constant K _ana2 : constant (> 0) V _ana ^* : The target value of the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 _Vana : The measured value of the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 The output of the controller 122 is transmitted via a signal line 122a. Inflow-is transmitted to the anaerobic tank bypass inflow pump 13.

As described above, if the measured value V _ana of the oxidation-reduction potential is larger than the target value V _ana ^{*, the} amount of _waste water Q _ana flowing into the anaerobic tank 4 by bypass increases, and the amount of organic matter supplied to the anaerobic tank 4 increases. I do. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value V _ana of the oxidation-reduction potential is smaller than the target value V _ana ^{*, the} amount of _waste water Q _ana flowing into the anaerobic tank 4 by bypass decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the eighteenth embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidized water is supplied to the anaerobic tank 4 in accordance with a difference from a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 by adjusting the amount of sewage flowing into the bypass, the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system The effect of reliably reducing the amount of phosphorus to be obtained is obtained.

Embodiment 19 FIG. FIG. 19 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 19 of the present invention. This embodiment includes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount, and adjusts the amount of sewage flowing into the anaerobic tank by bypass. This is the configuration of the device. In FIG. 19, reference numeral 162 denotes a phosphorus content measuring device (phosphorus discharge amount detecting means) for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4, and 133 denotes a setting for setting a target value of the phosphorus content. (Phosphor discharge target value setting means), 123
The inflow-anaerobic-tank bypass inflow pump sends a signal that sets the bypass inflow into the anaerobic tank 4 to a predetermined value according to the difference between the measured value of the phosphorus content measuring device 162 and the target value set in the setting unit 133. 13 (an anaerobic tank inflow water amount adjustment signal output means). The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The controller 123 is connected to the signal line 16.
2a via a phosphorus content measuring device 162 and a signal line 133
a and the inflow-anaerobic tank bypass inflow pump 13 via a signal line 123a.
The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. The phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured by a phosphorus content measuring device 162, and the measured value is transmitted to the controller 123 via a signal line 162a. The target value set in the setting unit 133 is transmitted to the controller 123 via the signal line 133a.
Conveyed to. The controller 123 sets the bypass inflow sewage amount to the anaerobic tank 4 to a value obtained, for example, according to the following equation (10.1) according to the difference between the measured value of the phosphorus content and a predetermined target value. Output a signal. _{Q ana = Q ana0 + K ana3} (P acm_ana -P acm_ana *) (10.1) where, Q _ana: bypass inlet sewage quantity Q to the anaerobic tank ₄ ana0: constant _K ana3: constant _(<0) P acm_ana ^* : Target value of phosphorus content of phosphorus accumulating bacteria in mixed solution in anaerobic tank 4 _{Pacm_ana} : Measured value of phosphorus content of phosphorus accumulating bacteria in mixed solution in anaerobic tank 4 The output of controller 123 is a signal line. It is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via 123a.

From the above, the measured value of the phosphorus content _{Pacm_ana}
There is smaller than the target value _P acm_ana ^*, bypass inlet sewage quantity Q _ana to the anaerobic tank 4 increases, organic feed to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, the measured value P of the phosphorus content
If is greater than the target value _P acm_ana ^* acm_ana, bypass inlet sewage quantity Q _ana to the anaerobic tank 4 decreases, organic feed to the anaerobic tank 4 decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the nineteenth embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the anaerobic tank is determined according to the difference from a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 by adjusting the amount of sewage flowing into the bypass 4 and maintaining the discharge amount of phosphorus constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, The effect of reliably reducing the amount of phosphorus flowing out of the furnace is obtained.

Embodiment 20 FIG. FIG. 20 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 20 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus discharged. The apparatus is configured to regulate the amount of sewage flowing into the anaerobic tank by bypass. FIG.
, 142 is a phosphoric acid phosphorus concentration meter (phosphorous discharge amount detecting means, calculating means) for measuring the phosphoric acid phosphorus concentration in the mixed solution in the anaerobic tank 4, 141 is phosphorus of the sewage flowing into the biological reaction tank 2. A phosphoric acid phosphorus concentration meter (phosphor discharge amount detecting means, calculating means) 181 for measuring the acid phosphorus concentration, 181 is a phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and a phosphorus of the sewage flowing into the biological reaction tank 2. An arithmetic unit (phosphor discharge amount detection means, arithmetic means) 134 for calculating the difference between the acidic phosphorus concentration and the phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphorus in the sewage flowing into the biological reaction tank 2 are provided. Setter for setting the target value of the difference from the acid phosphorus concentration (phosphor discharge target value setting means), 1
Reference numeral 24 indicates to the inflow-anaerobic tank bypass inflow pump 13 a signal that sets the amount of sewage bypassed into the anaerobic tank 4 to a predetermined value according to the difference between the calculated value of the calculator 181 and the target value set in the setting unit 134. This is an output regulator (analysis tank inflow water amount adjustment signal output means). Phosphoric acid concentration meter 142 is used in anaerobic tank 4
The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The arithmetic unit 181 is connected to the phosphoric acid concentration meter 142 via a signal line 142a and to the phosphoric acid concentration meter 141 via a signal line 141a. The adjuster 124 includes an arithmetic unit 181 via a signal line 181a, a setting unit 134 via a signal line 134a, and a signal line 124a.
Is connected to the inflow-anaerobic tank bypass inflow pump 13. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the calculator 181 via the signal line 142a. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141.
And the measured value is calculated by the arithmetic unit 1 via the signal line 141a.
It is conveyed to 81. The arithmetic unit 181 is, for example, the following (1)
According to the formula 1.1), the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is calculated. D _{PO4_ana_in} = C _{PO4_ana} −C _{PO4_in} (11.1) where D _{PO4_ana_in is} the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2. C _{PO4_ana} : Phosphorus phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 C _{PO4_in} : Phosphorus phosphorus concentration of sewage flowing into the biological reaction tank 2

The operation value of the operation unit 181 is expressed by a signal line 181a.
To the regulator 124 via The setting device 13
The target value set to 4 is transmitted to the controller 124 via the signal line 134a. The controller 124 calculates the difference between the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2, and a predetermined target value. In accordance with the difference, a signal is output which sets the bypass inflow sewage amount to the anaerobic tank 4 to a value obtained according to, for example, the following equation (11.2). _{Q ana = Q ana0 + K ana4} (D PO4_ana_in -D PO4_ana_in *) (11.2) where, Q _ana: bypass inlet sewage quantity Q to the anaerobic tank ₄ ana0: constant _K ana4: constant (<0) D _{PO4_ana_in} ^* : Target value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 D _{PO4_ana_in} : phosphorus in the mixed solution in the anaerobic tank 4 The calculated value of the difference between the acid phosphorus concentration and the phosphorus acid phosphorus concentration of the sewage flowing into the biological reaction tank 2. The output of the controller 124 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via a signal line 124 a.

From the above, the sewage in the mixed solution in the anaerobic tank 4
Phosphorus acid phosphorus concentration and phosphorus in sewage flowing into biological reactor 2
Calculated value D of difference from acid phosphorus concentration_{PO4_ana_in}Is the target value D
_{PO4_an a_in} ^*If smaller, bypass to anaerobic tank 4
Inflow sewage Q_anaAnd the amount of organic matter supplied to the anaerobic tank 4
Increase. As a result, the phosphorus discharge increases and the amount of phosphorus removed
Increase. Conversely, phosphorus in the sewage in the mixed solution in the anaerobic tank 4
Acid phosphorus concentration and phosphorus acidity of sewage flowing into biological reaction tank 2
Calculated value D of difference from phosphorus concentration_{PO4_ana_in}Is the target value D
_{PO4_ana_in} ^*If larger, bypass to anaerobic tank 4
Inflow sewage Q_anaAnd the amount of organic matter supplied to the anaerobic tank 4
Decrease. As a result, the phosphorus discharge decreases and the phosphorus removal
Decrease.

As described above, according to the twentieth embodiment, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured. By adjusting the amount of organic matter supplied to the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the calculated value of the difference and a predetermined target value, the phosphorus discharge amount is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 21 FIG. FIG. 21 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 21 of the present invention. This embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the device is configured to adjust the amount of sewage that flows into the anaerobic tank by bypass. It is composed. FIG.
, 142 is a phosphoric acid phosphorus concentration meter (phosphorous discharge amount detecting means, estimating means) for measuring the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4, and 131 is a target value of the phosphoric acid phosphorus concentration. A setter 171 is a storage circuit (phosphorous discharge amount detecting means, estimating means) for accumulating data of the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4, and 182 is a phosphoric acid phosphorus stored in the storage circuit 171. A computing unit (phosphorus discharge amount detecting means, estimating means) for estimating the concentration of phosphoric acid in the sewage in the mixture in the anaerobic tank 4 using the concentration data (12)
1 is the estimated value of the phosphoric acid phosphorus concentration meter 142 and the setting device 131
The controller outputs to the inflow-anaerobic tank bypass inflow pump 13 a signal that sets the amount of sewage bypassed into the anaerobic tank 4 to a predetermined value in accordance with a difference from the target value set in the anaerobic tank 4. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The storage circuit 171 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a. The arithmetic unit 182 is connected to the storage circuit 171 via the signal line 171a. The controller 121 is connected to the arithmetic unit 182 via a signal line 182a.
, A setting unit 131 via a signal line 131a, and a signal line 1
It is connected to the inflow-anaerobic tank bypass inflow pump 13 via 21a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the storage circuit 171 via the signal line 142a. The arithmetic unit 182 estimates the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time by using the phosphoric acid phosphorus concentration data stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as the least square method. The data of the phosphoric acid concentration required for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the arithmetic unit 182 is transmitted to the controller 121 via the signal line 182a. Further, the target value set in the setting device 131 is transmitted to the controller 121 via the signal line 131a. Controller 1
Reference numeral 21 denotes the amount of sewage bypassed into the anaerobic tank 4 according to a difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, a value obtained according to a formula similar to the formula (8.1). Output a signal. The output of the controller 121 is the signal line 12
It is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via 1a.

As described above, if the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the anaerobic tank 4 by bypass increases, and the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases.
Conversely, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the anaerobic tank 4 by bypass decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, the phosphorus discharge is reduced, and the phosphorus removal amount is reduced.

As described above, according to the twenty-first embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphorus acid phosphorus concentration data is used. Estimating the concentration of phosphorous acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4 by bypass according to the difference between the estimated value and a predetermined target value. Since the amount of organic substances to be supplied is adjusted and the discharge amount of phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even if the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. According to the twenty-first embodiment,
Anaerobic tank 4 using accumulated phosphorus acid phosphorus concentration data
Since the phosphoric acid phosphorus concentration of the sewage in the mixed solution is estimated, the effect of quickly adjusting the amount of organic substances supplied to the anaerobic tank 4 can be obtained even when the analysis of the phosphoric acid phosphorus concentration requires time.

Embodiment 22 FIG. FIG. 22 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 22 of the present invention. This embodiment is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent as a means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage that flows into the anaerobic tank by bypass. It constitutes the device. In FIG. 22, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter (outflow phosphorus amount detecting means, phosphorus concentration meter) for measuring the concentration of phosphoric acid phosphorus in the effluent, 135 denotes a setter for setting a target value of the phosphoric acid phosphorus concentration, and 125 denotes a setter. Phosphoric acid concentration meter 146
A controller that outputs to the inflow-anaerobic tank bypass inflow pump 13 a signal that sets the bypass inflow sewage amount to the anaerobic tank 4 to a predetermined value in accordance with the difference between the measured value of and the target value set in the setter 135 ( Anaerobic tank inflow water amount adjustment signal output means). The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 125 includes a phosphoric acid phosphorus concentration meter 146 via a signal line 146a and a setting unit 135 via a signal line 135a.
And the inflow-anaerobic tank bypass inflow pump 13 via a signal line 125a. Other components are shown in Figure 1.
7 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The concentration of phosphoric acid in the effluent is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 125 via a signal line 146a. The target value set in the setting device 135 is as follows:
The signal is transmitted to the controller 125 via the signal line 135a. The controller 125 adjusts the amount of sewage that flows into the anaerobic tank 4 by a bypass according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to the following equation (12.1). Output a signal. _{Q ana = Q ana0 + K ana5} (C PO4_out -C PO4_out *) (12.1) where, Q _ana: bypass inlet sewage quantity Q to the anaerobic tank ₄ ana0: constant _K ana5: constant (> 0) C _{PO4_out} ^* : Target value of the concentration of phosphoric acid in the discharge water C _{PO4_out} : Measured value of the concentration of phosphoric acid in the discharge water The output of the controller 125 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via a signal line 125a.

From the above, the measured value C of the phosphoric acid phosphorus concentration
If is greater than the target value C _{PO4_out} ^* _{PO4_out,} bypass inlet sewage quantity Q _ana to the anaerobic tank 4 increases, organic feed to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value C _{PO4_out} phosphorus phosphorus acid concentration is less than the target value C _{PO4_out} ^*, bypass inlet sewage quantity Q _ana to the anaerobic tank 4 decreases,
The supply amount of the organic matter to the anaerobic tank 4 is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the twenty-second embodiment, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the anaerobic tank 4 is adjusted according to the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus, and the amount of phosphorus discharged from the system is kept constant. The effect that can be reduced is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 23 FIG. FIG. 23 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 23 of the present invention. This embodiment is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent as a means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage that flows into the anaerobic tank by bypass. It constitutes the device. In FIG. 23, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and 126 denotes a predetermined value of the amount of sewage flowing into the anaerobic tank 4 by bypass according to the measurement value of the phosphoric acid phosphorus concentration meter 146. This is a controller (anaerobic tank inflow water amount adjustment signal output means) for outputting a signal to the inflow-anaerobic tank bypass inflow pump 13. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 126 is connected to the signal line 14.
6a and the phosphoric acid phosphorus concentration meter 146 and the signal line 12
It is connected to the inflow-anaerobic tank bypass inflow pump 13 via 6a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. The concentration of phosphoric acid in the discharged water is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 126 via a signal line 146a. The controller 126 outputs a signal for setting the amount of sewage flowing into the anaerobic tank 4 by bypass in accordance with the measured value of the phosphoric acid phosphorus concentration, for example, according to the following equation (13.1). Q _ana = Q _ana0 + K _ana6 C _{PO4_out} (13.1) Here, Q _ana : the amount of sewage that flows into the anaerobic tank 4 by bypass Q _ana0 : constant K _ana6 : constant (> 0) C _{PO4_out} : phosphoric acid of discharge water The output of the controller 126 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via a signal line 126a.

From the above, the measured value C of the phosphoric acid phosphorus concentration was obtained.
_{PO4_out} depending on whether how large, the bypass inlet sewage quantity Q _ana to the anaerobic tank 4 increases or decreases, organic feed to the anaerobic tank 4 increases or decreases. As a result, the amount of phosphorus discharge increases and decreases,
Phosphorus removal increases or decreases.

As described above, according to the twenty-third embodiment, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage bypassed into the anaerobic tank 4 is adjusted according to the measured value. Since the amount of organic substances to be supplied to 4 is adjusted and the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. .

In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 24 FIG. FIG. 24 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 24 of the present invention. This embodiment includes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into a biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the amount of sewage flowing into the anaerobic tank by bypass. The apparatus is configured so as to adjust. In FIG. 24, reference numeral 141 denotes a phosphoric acid phosphorus concentration meter (inflow phosphorus amount detecting means, phosphorus concentration meter) for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2; A setter 127 for setting the value is a signal for setting the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value of the phosphoric acid phosphorus concentration meter 141 and the target value set in the setter 137. (Anaerobic tank inflow water amount adjustment signal output means). The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. The controller 127 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a, the setting device 137 via the signal line 137a, and the inflow-anaerobic tank bypass inflow pump 13 via the signal line 127a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. Biological reaction tank 2
Is measured by a phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to a controller 127 via a signal line 141a. The target value set in the setting device 137 is transmitted to the controller 12 via a signal line 137a.
It is conveyed to 7. The controller 127 adjusts the amount of sewage flowing into the anaerobic tank 4 by bypass, for example, in accordance with the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value as described in the following (14.1).
A signal having a value obtained according to the equation is output. _{Q ana = Q ana0 + K ana7} (C PO4_in -C PO4_out *) (14.1) where, Q _ana: bypass inlet sewage quantity Q to the anaerobic tank ₄ ana0: constant _K ana7: constant (> 0) C _{PO4_out} ^* : Target value of the concentration of phosphoric acid in the discharged water C _{PO4_in} : Measured value of the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 The output of the controller 127 is supplied via the signal line 127a. Conveyed to.

As described above, depending on how much the measured value C _{PO4_in of the} concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 is larger than the target value C _{PO4_out} ^{* of the} concentration of phosphoric acid phosphorus in the effluent, Of the bypass inflow sewage _Qana increases or decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases or decreases. as a result,
The phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to the twenty-fourth embodiment, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the difference between the concentration and the target value of the concentration of the phosphoric acid in the discharged water is determined. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 according to the
Since the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 25 FIG. FIG. 25 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 25 of the present invention. This embodiment includes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into a biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the amount of sewage flowing into the anaerobic tank by bypass. The apparatus is configured so as to adjust. In FIG. 25, 141 is a phosphoric acid phosphor concentration meter for measuring the phosphoric acid phosphor concentration of sewage flowing into the biological reaction tank 2, and 128 is a phosphoric acid phosphor concentration meter 1
An adjuster (anaerobic tank inflow water amount adjustment signal output means) that outputs a signal that sets the bypass inflow sewage amount to the anaerobic tank 4 to a predetermined value in accordance with the measurement value 41 to the inflow-anaerobic tank bypass inflow pump 13. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. The controller 128 is connected to the phosphoric acid phosphorus concentration meter 141 via a signal line 141a and to the inflow-anaerobic tank bypass inflow pump 13 via a signal line 128a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Next, the operation will be described. Biological reaction tank 2
Is measured by a phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to a controller 128 via a signal line 141a. The controller 128 outputs a signal that makes the amount of sewage bypassed into the anaerobic tank 4 a value obtained, for example, according to the following equation (15.1) according to the measured value of the phosphoric acid phosphorus concentration. Q _ana = Q _ana0 + K _ana8 C _{PO4_in} (15.1) Where, Q _ana : bypass sewage amount flowing into the anaerobic tank 4 Q _ana0 : constant K _ana8 : constant (> 0) C _{PO4_in} : flow into the biological reaction tank 2 The output of the controller 128 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via a signal line 128a.

As described above, the measured value C of the phosphoric acid phosphorus concentration
_{PO4_in} depending on whether how large, the bypass inlet sewage quantity Q _ana to the anaerobic tank 4 increases or decreases, organic feed to the anaerobic tank 4 increases or decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to the twenty-fifth embodiment, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage bypassed into the anaerobic tank 4 is determined in accordance with the measured value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably ensured. The effect that can be reduced is obtained.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 26 FIG. FIG. 26 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 26 of the present invention. This embodiment is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and adjusts the amount of sewage flowing into the anoxic tank by-pass. This is the configuration of the device. In FIG. 26, i is a pipe connected to the pipe b and the oxygen-free tank 5 for bypassing a part of the sewage flowing out of the sedimentation tank 1 into the oxygen-free tank 5, and 11 is a bypass connected to the oxygen-free tank 5. This is a primary sedimentation-anoxic tank bypass inflow pump provided in pipe i for adjusting the flow rate of sewage flowing in.

Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4.
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
Reference numeral 121 denotes the measured value of the phosphoric acid phosphorus concentration meter 142 and the setting device 1
A controller for outputting a signal for setting the amount of sewage bypassed into the anoxic tank 5 to a predetermined value in accordance with a difference from a target value set to 31 to the initial sink-anoxic tank bypass inflow pump 11.
The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The controller 121 includes a phosphoric acid phosphorus concentration meter 142 via a signal line 142a and the setting unit 1 via a signal line 131a.
31 and the primary sink-anoxic tank bypass inflow pump 11 via a signal line 121a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the controller 121 via a signal line 142a. The target value set in the setting device 131 is transmitted to the controller 12 via the signal line 131a.
It is conveyed to 1. The controller 121 determines the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, as described in (16.
1) A signal having a value obtained according to the equation is output. _{Q ano = Q ano0 + K ano8} (C PO4_ana -C PO4_ana *) (16.1) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano8: constant (> 0) C _{PO4_ana} ^* : Target value of phosphoric acid phosphorus concentration of sewage in mixed solution in anaerobic tank 4 C _{PO4_ana} : Measured value of phosphoric acid phosphorus concentration of sewage in mixed solution in anaerobic tank 4 The output of controller 121 is signal line 121a. To the initial sink-anoxic tank bypass inflow pump 11.

As described above, the measured value C of the phosphoric acid phosphorus concentration
If is greater than the target value C _{PO4_ana} ^* _{PO4_ana,} bypass inlet sewage quantity Q _ano to anoxic tank 5 is increased, organic feed to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value C _{PO4_ana} of the phosphoric acid phosphorus concentration is smaller than the target value C _{PO4_ana} ^{*, the} amount of wastewater Q _ano flowing into the anoxic tank 5 by bypass decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. I do. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the twenty-sixth embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxygen-free tank is determined according to a difference from a predetermined target value. Oxygen-free tank 5
Since the amount of organic matter supplied to the system is adjusted, the amount of organic matter necessary for discharging phosphorus can be supplied to the anaerobic tank 4 and the surplus organic matter can be supplied to the oxygen-free tank 5. Even when the concentration fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system and reducing the amount of nitrogen can be obtained.

Embodiment 27 FIG. FIG. 27 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 27 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as follows. In FIG. 27, reference numeral 152 denotes an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4;
Is a setter for setting a target value of the oxidation-reduction potential, and 122 is the amount of sewage that flows into the anoxic tank 5 in accordance with the difference between the measurement value of the oxidation-reduction potential meter 152 and the target value set in the setter 132. This is a controller that outputs a signal having a predetermined value to the initial settling-oxygen-free tank bypass inflow pump 11. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. Controller 122
Is connected to an oxidation-reduction potentiometer 152 via a signal line 152a,
The setting unit 132 and the signal line 122 are connected via the signal line 132a.
It is connected to the initial settling-oxygen-free tank bypass inflow pump 11 through a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. The oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured using an oxidation-reduction potentiometer 15.
2, and the measured value is transmitted to the controller 122 via the signal line 152a. The target value set in the setting device 132 is transmitted to the controller 122 via the signal line 132a. The controller 122 sets the bypass inflow sewage amount to the anoxic tank 5 to a value obtained according to, for example, the following equation (17.1) according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. And output a signal. Q _ano = Q _ano0 + K _ano9 (V _ana −V _ana ^* ) (17.1) Here, Q _ano : the amount of sewage flowing into the anaerobic tank 4 by bypass Q _ano0 : constant K _ano9 : constant (<0) V _ana ^* : The target value of the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 _Vana : The measured value of the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 The output of the controller 122 is transmitted via a signal line 122a. Initial sedimentation is transmitted to the anoxic tank bypass inflow pump 11.

As described above, if the measured value V _ana of the oxidation-reduction potential is smaller than the target value V _ana ^{*, the} amount of wastewater Q _ano flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 Increase. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, the measured value V of the oxidation-reduction potential
_{If ana} is larger than the target value _Vana ^* , the bypass inflow sewage _Qano to the anaerobic tank 5 decreases, and the amount of organic matter supplied to the anaerobic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the twenty-seventh embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxygen-reducing potential of the anaerobic tank 5 is determined according to a difference from a predetermined target value. By adjusting the amount of organic matter supplied to the oxygen-free tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5, excess organic matter is supplied to the anaerobic tank 5 while supplying the amount of organic matter necessary for discharging phosphorus to the anaerobic tank 4. Thus, even when the flow rate and concentration of sewage flowing from outside the system fluctuate, the amount of phosphorus flowing out of the system can be reliably reduced, and the amount of nitrogen can be reduced.

Embodiment 28 FIG. FIG. 28 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 28 of the present invention. This embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount, and measures the amount of sewage flowing into the anoxic tank by bypass. The device is configured to adjust. In FIG. 28, 162 is a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4, 133 is a setting device for setting a target value of the phosphorus content,
Reference numeral 23 denotes a measured value of the phosphorus content measuring device 162 and a setting device 133.
The controller outputs a signal to the initial sink-anoxic tank bypass inflow pump 11 that sets the amount of sewage bypassed into the anoxic tank 5 to a predetermined value in accordance with the difference from the target value set in (1). The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The controller 123 includes a phosphorus content measuring device 162 via a signal line 162a, a setting device 133 via a signal line 133a,
It is connected to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 123a. Other components are shown in FIG.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured by a phosphorus content measuring device 162, and the measured value is transmitted to the controller 123 via a signal line 162a. The target value set in the setting unit 133 is transmitted to the controller 123 via the signal line 133a.
Conveyed to. The controller 123 sets the bypass inflow sewage amount to the anaerobic tank 4 to a value obtained according to, for example, the following equation (18.1) according to the difference between the measured value of the phosphorus content and a predetermined target value. Output a signal. _{Q ano = Q ano0 + K ana10} (P acm_ana -P acm_ana *) (18.1) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano10: constant _(> 0) P acm_ana ^* : Target value of the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 _{Pacm_ana} : Measured value of the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 The output of the controller 123 is a signal. It is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via the line 123a.

From the above, the measured value of the phosphorus content _{Pacm_ana}
There is greater than the target value _P acm_ana ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is increased, organic feed to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if phosphorus content measured value P _{Acm_ana} is smaller target value _P acm_ana ^* than the bypass inlet sewage quantity Q _ano to anoxic tank 5 is reduced, organic feed to anoxic tank 5 is reduced . As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the twenty-eighth embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the oxygen content is determined based on the difference from a predetermined target value. Anoxic tank 5
Since the amount of organic matter supplied to the system is adjusted, the amount of organic matter necessary for discharging phosphorus can be supplied to the anaerobic tank 4 and the surplus organic matter can be supplied to the oxygen-free tank 5. Even when the concentration fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system and reducing the amount of nitrogen can be obtained.

Embodiment 29 FIG. FIG. 29 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 29 of the present invention. In the present embodiment, a device for calculating the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank is used as means for detecting the phosphorus discharge amount. The apparatus is configured to adjust the amount of sewage flowing into the anoxic tank by bypass. In FIG. 29, a phosphoric acid phosphorus concentration meter 142 measures the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4.
Reference numeral 1 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. Calculator for calculating the difference from the phosphoric acid phosphorus concentration of
Reference numeral 134 denotes a setter for setting a target value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2.
Is output to the initial sink-anoxic-tank bypass inflow pump 11 in accordance with the difference between the calculated value and the target value set in the setting unit 134. It is a regulator. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4, and the phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The arithmetic unit 181 is connected to the phosphoric acid concentration meter 142 via a signal line 142a and to the phosphoric acid concentration meter 141 via a signal line 141a. The controller 124 is connected to an arithmetic unit 181 via a signal line 181a,
The setting device 134 and the signal line 124 are connected via a signal line 134a.
It is connected to the initial settling-oxygen-free tank bypass inflow pump 11 through a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the calculator 181 via the signal line 142a. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141.
And the measured value is calculated by the arithmetic unit 1 via the signal line 141a.
It is conveyed to 81. The arithmetic unit 181 is, for example, the following (1)
According to the formula 9.1), the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is calculated. D _{PO4_ana_in} = C _{PO4_ana} −C _{PO4_in} (19.1) where D _{PO4_ana_in is} the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2. C _{PO4_ana} : Phosphorus phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 C _{PO4_in} : Phosphorus phosphorus concentration of sewage flowing into the biological reaction tank 2

The operation value of the operation unit 181 is expressed by a signal line 181a.
To the regulator 124 via The setting device 13
The target value set to 4 is transmitted to the controller 124 via the signal line 134a. The controller 124 calculates the difference between the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2, and a predetermined target value. In accordance with the difference, a signal is output to set the amount of sewage flowing into the anoxic tank 5 by bypass, for example, to a value obtained according to the following equation (19.2). _{Q ano = Q ano0 + K ano11} (D PO4_ana_in -D PO4_ana_in *) (19.2) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano11: constant (> 0) D _{PO4_ana_in} ^* : Target value of the difference between the phosphoric acid phosphorus concentration in the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration in the sewage flowing into the biological reaction tank 2 D _{PO4_ana_in} : sewage in the mixed solution in the anaerobic tank 4 The calculated value of the difference between the concentration of the phosphoric acid and the concentration of the phosphoric acid in the sewage flowing into the biological reaction tank 2. The output of the controller 124 is transmitted to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 124 a.

From the above, the sewage in the mixed solution in the anaerobic tank 4
Phosphorus acid phosphorus concentration and phosphorus in sewage flowing into biological reactor 2
Calculated value D of difference from acid phosphorus concentration_{PO4_ana_in}Is the target value D
_{PO4_an a_in} ^*If it is larger, the bypass to the anoxic tank 5
Inflow sewage Q_anoAnd the supply of organic matter to the anoxic tank 5
The salary increases. As a result, the denitrification reaction becomes active,
The element removal amount increases. Conversely, the lower part of the mixture in the anaerobic tank 4
Phosphoric acid phosphorus concentration of water and sewage flowing into biological reaction tank 2
Calculated value D of difference from phosphoric acid phosphorus concentration_{PO4_ana_in}Is the target value
D_{PO4_ana_in} ^*If it is smaller than
Pass Inflow Sewage Q _anoDecreases, and organic matter to the anoxic tank 5
The supply is reduced. As a result, the denitrification reaction becomes inactive.
And the amount of nitrogen removed decreases.

As described above, according to the twenty-ninth embodiment, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 were measured. Since the amount of organic substances supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the oxygen-free tank 5 in accordance with the difference between the calculated value of the difference and a predetermined target value, phosphorus is discharged. The surplus organic matter can be supplied to the anaerobic tank 5 while supplying the amount of organic matter necessary for
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced and the amount of nitrogen can be reduced.

Embodiment 30 FIG. FIG. 30 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 30 of the present invention. The present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of sewage in a mixed solution in an anaerobic tank as a means for detecting a phosphorus discharge amount, and a device for adjusting a bypass inflow sewage amount to an oxygen-free tank. It is what constituted. FIG.
At 0, 142 is a phosphoric phosphorus concentration meter for measuring the phosphoric phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4, 131
Is a setting device for setting a target value of phosphoric acid phosphorus concentration, 171
The storage circuit 182 stores the phosphoric acid phosphorus concentration data of the sewage in the mixed solution in the anaerobic tank 4. A calculator 121 for estimating the phosphoric acid phosphorus concentration of sewage is provided in accordance with the difference between the estimated value of the phosphoric acid phosphorus concentration meter 142 and the target value set in the setting device 131.
The signal that sets the bypass inflow sewage volume to the specified value to the initial value-
This is a controller for outputting to the anoxic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The storage circuit 171 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a. Arithmetic unit 18
2 is connected to the storage circuit 171 via the signal line 171a. The controller 121 includes an arithmetic unit 182 via a signal line 182a and a setting unit 131 via a signal line 131a.
Is connected to the initial settling-anaerobic tank bypass inflow pump 11 via a signal line 121a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. The phosphoric acid phosphorus concentration in the mixed solution in the anaerobic tank 4 was measured using a phosphoric acid phosphorus concentration meter 1
The measurement is performed at 42, and the measured value is transmitted to the storage circuit 171 via the signal line 142a. The arithmetic unit 182 includes the storage circuit 1
The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time is estimated by using the phosphoric acid phosphorus concentration data accumulated in 71. This can be easily performed using a statistical analysis method such as the least square method. The data of the phosphoric acid concentration required for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the arithmetic unit 182 is transmitted to the controller 121 via the signal line 182a. The target value set in the setting device 131 is the signal value of the signal line 131.
is transmitted to the controller 121 via a. Controller 121
Is the amount of sewage that flows into the anoxic tank 5 by bypass according to the difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, a value obtained according to a formula similar to the formula (16.1). Output a signal. The output of the controller 121 is the signal line 12
It is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via 1a.

As described above, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the thirtieth embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data is used. The anaerobic tank is estimated by estimating the concentration of the phosphoric acid in the sewage in the mixed solution in 4 and adjusting the amount of sewage flowing into the anaerobic tank 5 in accordance with the difference between the estimated value and a predetermined target value. Since the amount of organic matter to be supplied to the wastewater 5 is adjusted, the amount of organic matter necessary for discharging phosphorus can be supplied to the anaerobic tank 4 and the surplus organic matter can be supplied to the oxygen-free tank 5. Even if the concentration or the concentration fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system and reducing the amount of nitrogen can be obtained. Further, according to the thirtieth embodiment, the phosphoric acid phosphorus concentration in the sewage in the mixed solution in the anaerobic tank 4 is estimated using the accumulated phosphoric acid phosphorus concentration data. Even when a long time is required, the effect of quickly adjusting the amount of organic substances supplied to the oxygen-free tank 5 can be obtained.

Embodiment 31 FIG. FIG. 31 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 31 of the present invention. The present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank by-pass. The apparatus is configured as follows. In FIG. 31, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the discharged water, 135 denotes a setting device for setting a target value of the phosphoric acid phosphorus concentration, and 125 denotes the measured value of the phosphoric acid phosphorus concentration meter 146. This is a controller that outputs a signal for setting the amount of sewage by-pass into the anoxic tank 5 to a predetermined value in accordance with a difference from a target value set in the vessel 135 to the initial sink-anoxic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 125 includes a phosphoric acid phosphorus concentration meter 146 via a signal line 146a, a setting unit 135 via a signal line 135a, and a signal line 125a.
Is connected to the initial settling-oxygen-free tank bypass inflow pump 11 through the inlet. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. The concentration of phosphoric acid in the effluent is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 125 via a signal line 146a. The target value set in the setting device 135 is as follows:
The signal is transmitted to the controller 125 via the signal line 135a. The controller 125 determines the amount of sewage that flows into the anoxic tank 5 by bypass according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to the following equation (20.1). Is output. _{Q ano = Q ano0 + K ano12} (C PO4_out -C PO4_out *) (20.1) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano12: constant (<0) C _{PO4_out} ^* : Target value of the concentration of phosphoric acid in the _effluent C _{PO4_out} : Measured value of the concentration of phosphoric acid in the _effluent The output of the controller 125 is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via a signal line 125a. .

From the above, the measured value C of the phosphoric acid phosphorus concentration was obtained.
If _{PO4_out} is smaller than the target value C _{PO4_out} ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is increased, organic feed to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value C _{PO4_out} of the phosphoric acid phosphorus concentration is greater than the target value C _{PO4_out} ^{*, the} amount of wastewater Q _ano flowing into the anoxic tank 5 by bypass decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. I do. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases.

As described above, according to the thirty-first embodiment, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of the organic matter, the amount of organic matter necessary for discharging phosphorus can be supplied to the anaerobic tank 4 and the excess organic matter can be supplied to the oxygen-free tank 5. Even if the flow rate or concentration of sewage flowing in from the outside fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced and the amount of nitrogen can be reduced.

In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 32 FIG. FIG. 32 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 32 of the present invention. The present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank by-pass. The apparatus is configured as follows. In FIG. 32, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and 126 denotes a predetermined value of the amount of sewage flowing into the anoxic tank 5 by bypass according to the measurement value of the phosphoric acid phosphorus concentration meter 146. Is output to the initial settling-anoxic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 126 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a and the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 126a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. The concentration of phosphoric acid in the discharged water is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 126 via a signal line 146a. The controller 126 outputs a signal that sets the bypass inflow sewage amount to the anoxic tank 5 to a value obtained according to, for example, the following equation (21.1) according to the measured value of the phosphoric acid phosphorus concentration. Q _ano = Q _ano0 + K _ano13 C _{PO4_out} (21.1) where, Q _ano : the amount of sewage flowing into the anoxic tank 5 by bypass Q _ano0 : constant K _ano13 : constant (<0) C _{PO4_out} : phosphoric acid of the discharge water The output of the measured value of the phosphorus concentration controller 126 is transmitted to the primary sedimentation-anoxic tank bypass inflow pump 11 via a signal line 126a.

From the above, the measured value C of the phosphoric acid phosphorus concentration
_{PO4_out} depending on whether how large, the bypass inlet sewage quantity Q _ano to anoxic tank 5 increases or decreases, organic feed to the anoxic tank 5 increases or decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the thirty-second embodiment, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the surplus organic matter can be supplied to the oxygen-free tank 5 while supplying the amount of organic substance necessary for discharging phosphorus to the anaerobic tank 4.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced and the amount of nitrogen can be reduced.

In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the discharged water. Good.

Embodiment 33 FIG. FIG. 33 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 33 of the present invention. This embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into a biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to regulate the amount of water. In FIG. 33, 141 is a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2, 137 is a setting device for setting the target value of the phosphoric acid phosphorus concentration in the effluent, and 127 is a phosphoric acid concentration. A signal for setting a predetermined value for the amount of sewage by-passing into the anoxic tank 5 according to the difference between the measurement value of the phosphorus concentration meter 141 and the target value set in the setting unit 137 is initially settled-anoxic tank bypass inflow pump. 11 is a controller for outputting to 11. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. The controller 127 includes a phosphoric acid phosphorus concentration meter 141 via a signal line 141a, a setting unit 137 via a signal line 137a, and a signal line 127a.
Is connected to the initial settling-oxygen-free tank bypass inflow pump 11 through the inlet. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. Biological reaction tank 2
Is measured by a phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to a controller 127 via a signal line 141a. The target value set in the setting device 137 is transmitted to the controller 12 via a signal line 137a.
It is conveyed to 7. The controller 127 adjusts the amount of sewage that flows into the anoxic tank 5 by the following method, for example, as described in (22.
1) A signal having a value obtained according to the equation is output. _{Q ano = Q ano0 + K ano14} (C PO4_in -C PO4_out *) (22.1) where, Q _ano: bypass inlet sewage quantity Q _ANO0 to anoxic tank 5: Constant K _Ano14: constant (<0) C _{PO4_out} ^* : Target value of the concentration of phosphoric acid phosphorus in the _effluent C _{PO4_in} : Measured value of the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 It is transmitted to the inflow pump 11.

As described above, according to how much the measured value C _{PO4_in of the} concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 is larger than the target value C _{PO4_out} ^{* of the} concentration of phosphoric acid phosphorus in the effluent, The amount of wastewater _Qano flowing into the bypass increases and decreases, and the amount of organic matter supplied to the anoxic tank 5 increases and decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the thirty-third embodiment, the concentration of the phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the difference between the concentration of the phosphoric acid and the concentration of the phosphoric acid in the discharge water is determined. The amount of organic matter to be supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the above conditions. Thus, the amount of organic matter necessary for discharging phosphorus is supplied to the anaerobic tank 4 while remaining. Organic matter can be supplied to the oxygen-free tank 5, and even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced and the amount of nitrogen can be reduced. Is obtained.

[0219] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the total phosphorus concentration is measured. The device may be configured.

Embodiment 34 FIG. FIG. 34 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 34 of the present invention. This embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into a biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to regulate the amount of water. In FIG. 34, 141 is a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, and 128 is a bypass inflow to the anoxic tank 5 according to the measurement value of the phosphoric acid phosphorus concentration meter 141. This is a controller that outputs a signal for setting the amount of sewage to a predetermined value to the initial settling / anaerobic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. Controller 128
Is a phosphoric acid phosphorus concentration meter 141 via a signal line 141a.
Is connected to the initial settling-anoxic tank bypass inflow pump 11 via a signal line 128a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 26, and thus detailed description thereof will be omitted.

Next, the operation will be described. Biological reaction tank 2
Is measured by a phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to a controller 128 via a signal line 141a. The controller 128 outputs a signal for setting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the measured value of the phosphoric acid phosphorus concentration, for example, according to the following equation (23.1). Q _ano = Q _ano0 + K _ano15 C _{PO4_in} (23.1) Here, Q _ano : The amount of sewage flowing into the anoxic tank 5 by bypass Q _ano0 : Constant K _ano15 : Constant (<0) C _{PO4_in} : To the biological reaction tank 2 The measured value of the phosphoric acid phosphorus concentration of the inflowing sewage is transmitted to the primary sink-anoxic tank bypass inflow pump 11 via a signal line 128a.

From the above, the measured value C of the phosphoric acid phosphorus concentration
_{PO4_in} depending on whether how large, the bypass inlet sewage quantity Q _ano to anoxic tank 5 increases or decreases, organic feed to the anoxic tank 5 increases or decreases. As a result, the amount of nitrogen removed increases or decreases.

As described above, according to the thirty-fourth embodiment, the concentration of the phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the measured value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of organic matter, so that the amount of organic matter necessary for discharging phosphorus can be supplied to the anaerobic tank 4 and the surplus organic matter can be supplied to the oxygen-free tank 5. Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced and the amount of nitrogen can be reduced.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 35 FIG. FIG. 35 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 35 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and the flow rate of the sewage flowing into the sedimentation tank first. (Hereinafter referred to as the amount of sewage flowing into the sedimentation basin). In FIG. 35, reference numeral 14 denotes a first sedimentation tank inflow pump (first sedimentation tank inflow water amount adjusting means) provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage in the mixed solution in the anaerobic tank 4;
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
Reference numeral 121 denotes the measured value of the phosphoric acid phosphorus concentration meter 142 and the setting device 1
This is a controller for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the difference from the target value set to 31. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. Controller 121
Is connected to a phosphoric acid phosphorus concentration meter 142 via a signal line 142a.
, A setting unit 131 via a signal line 131a, and a signal line 1
It is connected to the first settling tank inflow pump 14 via 21a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the controller 121 via a signal line 142a. The target value set in the setting device 131 is the signal value of the signal line 131.
is transmitted to the controller 121 via a. Controller 121
Is a signal that sets the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to a formula similar to the formula (8.1). Is output. The output of the controller 121 is transmitted to the first settling tank inflow pump 14 via a signal line 121a.

As described above, if the measured value of the phosphoric acid / phosphorus concentration is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, so that it first flows out of the sedimentation basin 1 and flows into the anaerobic tank 4. The flow rate of sewage (hereinafter, referred to as the amount of sewage flowing into the anaerobic tank 4) increases, and the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The organic matter supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the thirty-fifth embodiment, the nitrate nitrogen concentration of the sewage in the mixed liquid in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Anoxic tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the thirty-fifth embodiment, the concentration of phosphorous acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 36 FIG. FIG. 36 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 36 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and measures the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 36, each component is the same as or similar to that shown in FIG. 3 and FIG.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (8.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the thirty-sixth embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass 5, the amount of nitrogen flowing out of the system is reduced even if the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect that can be reliably reduced is obtained. Furthermore, according to the thirty-sixth embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. Adjust the anaerobic tank 4
The amount of easily decomposable organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 37 FIG. FIG. 37 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 37 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and measures the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 37, each component is the same as or equivalent to that shown in FIG. 5 and FIG.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (8.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the thirty-seventh embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 37, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation tank 1 is determined according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus was kept constant, so that the flow rate and concentration of the sewage flowing from outside the system fluctuated. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 38 FIG. FIG. 38 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 38 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment includes a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 38, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 35 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (8.1) is first output to the settling tank inflow pump 14.

As described above, according to the thirty-eighth embodiment, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 38, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged was kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 39 FIG. FIG. 39 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 39 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and measures the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 39, each component is the same as or equivalent to that shown in FIG. 9 and FIG.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (8.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the thirty-ninth embodiment, the nitrate nitrogen concentration of the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from the predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the thirty-ninth embodiment, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the first settling tank 1 is set in accordance with a difference from a predetermined target value.
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the amount or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing out of the biological water treatment apparatus is detected by measuring the concentration of nitrate nitrogen in the effluent. The apparatus may be configured to measure the distance.

Embodiment 40 FIG. FIG. 40 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 40 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and measures the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 40, since each component is the same as or equivalent to that shown in FIG. 11 and FIG.
Detailed description is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (8.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fortieth embodiment, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 40, the anaerobic tank 4
The concentration of sewage in the mixed liquid in the sewage is measured, and the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 are adjusted according to a difference from a predetermined target value. In this way, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 41 FIG. FIG. 41 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 41 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and measures the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 41, each component is the same as or equivalent to that shown in FIG. 13 and FIG. 35 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (8.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the forty-first embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 41, the anaerobic tank 4
The concentration of sewage in the mixed liquid in the sewage is measured, and the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 are adjusted according to a difference from a predetermined target value. In this way, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the inflow water. Good.

Embodiment 42. FIG. 42 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 42 of the present invention. The present embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2 as means for detecting the amount of nitrogen flowing from outside the system. The device is configured to regulate the amount of water. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, and measures the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 42, each component is the same as or equivalent to that shown in FIG. 15 and FIG. 35 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the thirty-fifth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (8.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the forty-second embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this embodiment 42
According to the method, the concentration of phosphoric acid and phosphorus in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 43 FIG. FIG. 43 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 43 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. FIG.
In the figure, reference numeral 14 denotes a first sedimentation tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Further, reference numeral 152 denotes an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, reference numeral 132 denotes a setting device for setting a target value of the oxidation-reduction potential, and reference numeral 122 denotes an oxidation-reduction potential meter 152 Is a controller for outputting to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value in accordance with the difference between the measured value and the target value set in the setter 132. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The controller 122 is connected to the oxidation-reduction potentiometer 152 via a signal line 152a, the setter 132 via a signal line 132a, and the first sedimentation tank inflow pump 14 via a signal line 122a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured by the oxidation-reduction potentiometer 152, and the measured value is transmitted to the controller 122 via the signal line 152a. The target value set in the setting device 132 is transmitted to the controller 122 via the signal line 132a. The controller 122 calculates the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the oxidation-reduction potential and a predetermined target value, for example, with a value obtained according to a formula similar to the formula (9.1). Output a signal. The output of the regulator 122 is transmitted to the first settling tank inflow pump 14 via a signal line 122a.

As described above, if the measured value of the oxidation-reduction potential is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. The supply of organic matter to the plant increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the oxidation-reduction potential is smaller than the target value,
As the amount of sewage flowing into the anaerobic tank 4 decreases, the amount of sewage flowing into the anaerobic tank 4 decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the forty-third embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Anoxic tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 43, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 44 FIG. FIG. 44 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 44 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 44, each component is the same as or equivalent to that shown in FIG. 3 and FIG.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (9.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the forty-fourth embodiment, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 was measured.
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the forty-fourth embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 45 FIG. FIG. 45 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 45 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 45, each component is the same as or equivalent to that shown in FIG. 5 and FIG.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (9.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the forty-fifth embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 were measured, and the difference between them was measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the forty-fifth embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting and adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 46 FIG. FIG. 46 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 46 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an anaerobic tank as a means for detecting the amount of phosphorus discharged, so as to adjust the amount of sewage flowing into a sedimentation tank first. This is a device configuration. In FIG. 46, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 43 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (9.1) is first output to the settling tank inflow pump 14.

As described above, according to the forty-sixth embodiment, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the forty-sixth embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 47 FIG. FIG. 47 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 47 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 47, each component is the same as or equivalent to that shown in FIG. 9 and FIG.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (9.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the forty-seventh embodiment, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the forty-seventh embodiment, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 48 FIG. FIG. 48 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 48 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 48, each component is the same as or equivalent to that shown in FIG. 11 and FIG. 43 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (9.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the forty-eighth embodiment, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 48, the anaerobic tank 4
Measuring the oxidation-reduction potential of the sewage in the mixed liquid in the tank, adjusting the amount of sewage flowing into the sedimentation basin 1 in accordance with the difference from a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4 Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 49 FIG. FIG. 49 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 49 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 49, each component is the same as or equivalent to that shown in FIG. 13 and FIG.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (9.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the forty-ninth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 49, the anaerobic tank 4
Measuring the oxidation-reduction potential of the sewage in the mixed liquid in the tank, adjusting the amount of sewage flowing into the sedimentation basin 1 in accordance with the difference from a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4 Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

In the present embodiment, the flow from outside the system is
By measuring the total nitrogen concentration in the influent
Detected, but equipped to measure ammonia nitrogen concentration.
May be configured.

Embodiment 50 FIG. FIG. 50 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 50 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of phosphorus discharged, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 50, each component is the same as or equivalent to that shown in FIG. 15 and FIG. 43 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the forty-third embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (9.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fiftieth embodiment,
For example, measure the total nitrogen concentration of sewage flowing into biological reactor 2
And, according to the measured value, flows into the anoxic tank 5 by bypass.
Organic matter supplied to anoxic tank 5 by adjusting the amount of water
Since the amount is adjusted, the flow rate and concentration of sewage flowing from outside the system
Ensure that the amount of nitrogen flowing out of the system is reduced even if
The effect that can be reduced is obtained. Further, in this embodiment 50
According to the above, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4
Measure the first settling basin according to the difference from the predetermined target value
Adjust the amount of inflow sewage to 1 and adjust the amount of inflow sewage to anaerobic tank 4
Adjust the amount of organic matter to be supplied to the anaerobic tank 4
And keeps the phosphorus discharge rate constant,
Phosphorus flowing out of the system even when the flow rate and concentration of water fluctuate
The effect of reliably reducing the amount of is obtained.

[0284] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 51 FIG. FIG. 51 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 51 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above. Further, the present embodiment includes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the anaerobic tank as a means for detecting the phosphorus discharge amount, and adjusts the amount of sewage flowing into the first sedimentation basin. The device is configured as follows. In FIG. 51,
Reference numeral 14 denotes a first sedimentation tank inflow pump provided on the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Reference numeral 162 denotes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4.
33 is a setter for setting a target value of the phosphorus content, and 123 is the amount of sewage flowing into the sedimentation basin 1 in accordance with the difference between the measured value of the phosphorus content measuring device 162 and the target value set in the setter 133. Is a controller that outputs a signal having a predetermined value to the first settling tank inflow pump 14. The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The controller 123 is connected to the signal line 16.
2a via a phosphorus content measuring device 162 and a signal line 133
The setting device 133 is connected to the first settling tank inflow pump 14 via the signal line 123a and the signal line 123a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured by a phosphorus content measuring device 162, and the measured value is transmitted to the controller 123 via a signal line 162a. Also,
The target value set in the setting device 133 is transmitted to the controller 123 via the signal line 133a. The controller 123 adjusts the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphorus content and a predetermined target value, for example, according to a formula similar to the formula (10.1). Output a signal. The output of the controller 123 is transmitted to the first settling tank inflow pump 14 via a signal line 123a.

As described above, if the measured value of the phosphorus content is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. The supply of organic matter to the plant increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphorus content is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The supply is reduced.
As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the fifty-first embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the fifty-first embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, the discharge amount of phosphorus is kept constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 52 FIG. FIG. 52 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 52 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, the present embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. FIG.
In FIG. 2, each component is the same as or equivalent to the component shown in FIG. 3 and FIG.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (10.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fifty-second embodiment, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 was measured.
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the fifty-second embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the phosphorus content in the first sedimentation basin 1 is reduced according to the difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 53 FIG. FIG. 53 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 53 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Further, the present embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. In FIG. 53, each component is the same as or equivalent to that shown in FIG. 5 and FIG. 51 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (10.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fifty-third embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the fifty-third embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 54 FIG. FIG. 54 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 54 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment includes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount, and adjusts the amount of sewage flowing into the first sedimentation tank. This is the configuration of the device. In FIG. 54, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 51 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to the same equation as the equation (10.1) is output to the settling tank inflow pump 14 first.

As described above, according to the fifty-fourth embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the fifty-fourth embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 55 FIG. FIG. 55 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 55 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. FIG.
In FIG. 5, each component is the same as or equivalent to that shown in FIG. 9 and FIG.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (10.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fifty-fifth embodiment, the concentration of the nitrate nitrogen in the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the fifty-fifth embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the first sedimentation basin 1 is determined according to a difference from a predetermined target value.
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent, but the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 56 FIG. FIG. 56 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 56 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. FIG.
In FIG. 6, each component is the same as or equivalent to the component shown in FIG. 11 and FIG.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (10.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fifty-sixth embodiment, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 56, the anaerobic tank 4
The phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the tank is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect that can be reduced is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 57 FIG. FIG. 57 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 57 of the present invention. The present embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2 as means for detecting the amount of nitrogen flowing from outside the system, and the amount of sewage flowing into the anoxic tank by bypass. The apparatus is configured so as to adjust. Further, the present embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. In FIG. 57, each component is the same as or equivalent to the component shown in FIG. 13 and FIG.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (10.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fifty-seventh embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total value of the total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the fifty-seventh embodiment, anaerobic tank 4
The phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the tank is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect that can be reduced is obtained.

[0310] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 58 FIG. FIG. 58 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 58 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. In FIG. 58, each component is shown in FIG.
1 is the same as or equivalent to the one denoted by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the fifty-first embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (10.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the fifty-eighth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this fifty-eighth embodiment
According to the method, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted in accordance with a difference from a predetermined target value to adjust the amount of sewage. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 59 FIG. FIG. 59 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 59 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment is an apparatus for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of discharged phosphorus. The apparatus is configured to control the amount of sewage flowing into the sedimentation basin at first. In FIG. 59, reference numeral 14 denotes a first settling tank inflow pump provided on a pipe a for adjusting the flow rate of sewage flowing into the first settling tank 1.

Numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4.
141 is a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2; A calculator 134 for calculating the difference between the concentration of phosphoric acid and the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 A setting device for setting a value, 124 is a computing device 1
A controller for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the difference between the calculated value of 81 and the target value set in the setter 134. . The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4, and the phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The arithmetic unit 181 is connected to the phosphoric acid concentration meter 142 via a signal line 142a and to the phosphoric acid concentration meter 141 via a signal line 141a. The regulator 124 is
The arithmetic unit 181 and the signal line 134 are connected via the signal line 181a.
a, and is connected to the first settling tank inflow pump 14 via a signal line 124a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the calculator 181 via the signal line 142a. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141, and the measured value is represented by a signal line 141.
This is transmitted to the arithmetic unit 181 via a. Arithmetic unit 181
Calculates the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 in accordance with, for example, equation (11.1).

[0318] The operation value of the operation unit 181 is represented by a signal line 181a.
To the regulator 124 via The setting device 13
The target value set to 4 is transmitted to the controller 124 via the signal line 134a. The controller 124 calculates a difference between the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 and a predetermined target value. In accordance with the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained according to, for example, a formula similar to the formula (11.2). The output of the regulator 124 is transmitted to the first settling tank inflow pump 14 via a signal line 124a.

As described above, if the calculated value of the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is smaller than the target value, As the amount of sewage flowing into the sedimentation basin 1 increases, the amount of sewage flowing into the anaerobic tank 4 increases, and the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, phosphorus discharge increases,
Phosphorus removal increases. Conversely, if the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is larger than the target value, the first settling tank 1 When the amount of sewage flowing into the anaerobic tank 4 decreases, the amount of sewage flowing into the anaerobic tank 4 decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, the phosphorus discharge is reduced, and the phosphorus removal amount is reduced.

As described above, according to the fifty-ninth embodiment, the nitrate nitrogen concentration of the sewage in the mixture in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the fifty-ninth embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 according to the difference between the value and the predetermined target value, and the amount of phosphorus discharged is kept constant. Even if the amount or concentration of sewage flowing from the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 60 FIG. FIG. 60 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 60 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, in this embodiment, as a means for detecting the amount of discharged phosphorus, the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is calculated. It is equipped with a device and is configured to control the amount of sewage flowing into the sedimentation basin first. In FIG. 60, each component is the same as or equivalent to that shown in FIG. 3 and FIG.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (11.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 60, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 was measured.
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 60, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 according to the difference between the value and the predetermined target value, and the amount of phosphorus discharged is kept constant. Even if the amount or concentration of sewage flowing from the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 61 FIG. FIG. 61 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 61 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Further, in the present embodiment, an apparatus for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank is used as means for detecting the amount of discharged phosphorus. The apparatus is configured to control the amount of sewage flowing into the sedimentation basin at first. In FIG. 61, each component is the same as or equivalent to that shown in FIG. 5 and FIG. 59 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (11.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 61, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 61, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 according to the difference between the value and the predetermined target value, and the amount of phosphorus discharged is kept constant. Even if the amount or concentration of sewage flowing from the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 62 FIG. FIG. 62 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 62 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
The present embodiment is provided with a device for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of discharged phosphorus. The apparatus is configured to regulate the amount of sewage flowing into the first settling basin. In FIG. 62, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 59 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (11.1) is output to the settling tank inflow pump 14 first.

As described above, according to this embodiment 62, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 62, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 according to the difference between the value and the predetermined target value, and the amount of phosphorus discharged is kept constant. Even if the amount or concentration of sewage flowing from the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 63 FIG. FIG. 63 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 63 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is an apparatus for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of discharged phosphorus. The apparatus is configured to control the amount of sewage flowing into the sedimentation basin at first. In FIG.
Each component is the same as or equivalent to that shown in FIG. 9 and FIG.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (11.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 63, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, according to the embodiment 63, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 according to the difference between the value and the predetermined target value, and the amount of phosphorus discharged is kept constant. Even if the amount or concentration of sewage flowing from the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent, but the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 64 FIG. FIG. 64 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 64 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is an apparatus for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of discharged phosphorus. The apparatus is configured to control the amount of sewage flowing into the sedimentation basin at first. In FIG. 64,
Each component is the same as or equivalent to the component shown in FIG. 11 and FIG.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (11.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the sixty-fourth embodiment, the concentration of the nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 64, the anaerobic tank 4
Phosphoric Acid Phosphorus Concentration of Sewage in Biological Mixture and Biological Reaction Tank 2
To the anaerobic tank 4 by adjusting the amount of sewage flowing into the sedimentation basin 1 in accordance with the difference between the calculated value of the sewage flowing into the sewage and the calculated value of the difference and a predetermined target value. Since the amount of organic substances to be supplied is adjusted and the discharge amount of phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the amount or concentration of sewage flowing from outside the system fluctuates is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 65 FIG. FIG. 65 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 65 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is an apparatus for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of discharged phosphorus. The apparatus is configured to control the amount of sewage flowing into the sedimentation basin at first. FIG.
In FIG. 5, each component is the same as or equivalent to that shown in FIG. 13 and FIG. 59 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (11.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 65, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 65, the anaerobic tank 4
Phosphoric Acid Phosphorus Concentration of Sewage in Biological Mixture and Biological Reaction Tank 2
To the anaerobic tank 4 by adjusting the amount of sewage flowing into the sedimentation basin 1 in accordance with the difference between the calculated value of the sewage flowing into the sewage and the calculated value of the difference and a predetermined target value. Since the amount of organic substances to be supplied is adjusted and the discharge amount of phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the amount or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 66 FIG. FIG. 66 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 66 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is an apparatus for calculating the difference between the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of discharged phosphorus. The apparatus is configured to control the amount of sewage flowing into the sedimentation basin at first. FIG.
In FIG. 6, each component is the same as or equivalent to that shown in FIG. 15 and FIG. 59 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of the fifty-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (11.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 66, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 by bypass is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this embodiment 66
According to the method, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the calculated value of the difference between them and a predetermined target value is measured. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 in accordance with the difference between the amount of sewage and the amount of sewage flowing from outside the system. Even when the concentration fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the inflow water. Good.

Embodiment 67 FIG. FIG. 67 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 67 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. In FIG. 67, reference numeral 14 denotes a first sedimentation tank inflow pump provided in a pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4.
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
171 is a storage circuit for accumulating data on the concentration of phosphoric acid and phosphorus in the sewage in the mixed solution in the anaerobic tank 4, and 182 is a storage circuit 17
1 is a calculator for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 using the data of the phosphoric acid phosphorus concentration accumulated in 1. Is a controller for outputting to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value in accordance with the difference from the target value set in the first settling time. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The storage circuit 171 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a. The arithmetic unit 182 is connected to the signal line 1
It is connected to the storage circuit 171 via the line 71a. The controller 121 is connected to an arithmetic unit 182 via a signal line 182a.
The setting device 131 and the signal line 121 are connected via the signal line 131a.
It is connected to the first settling tank inflow pump 14 via a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the storage circuit 171 via the signal line 142a. The arithmetic unit 182 estimates the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time by using the phosphoric acid phosphorus concentration data stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as the least square method. The phosphorous phosphorus concentration data required for analysis is
It is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the arithmetic unit 182 is transmitted to the controller 121 via the signal line 182a. Further, the target value of the phosphoric acid phosphorus concentration set in the setting device 131 is transmitted to the controller 121 via the signal line 131a. The controller 121 determines the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, (8.
A signal having a value obtained according to the equation similar to the equation 1) is output. The output of the controller 121 is transmitted to the first settling tank inflow pump 14 via a signal line 121a.

As described above, when the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. 4 increases the amount of organic matter supplied. as a result,
The phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The organic matter supply is reduced. As a result, the phosphorus discharge is reduced, and the phosphorus removal amount is reduced.

As described above, according to the sixty-sixth embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and based on the difference from the predetermined target value, By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 67, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data in the mixed solution in the anaerobic tank 4 are used. The concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and a predetermined target value. Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

Embodiment 68 FIG. FIG. 68 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 68 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. In FIG. 68,
Each component is the same as or equivalent to the component shown in FIG. 3 and FIG.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, (8.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 68, the oxidation-reduction potential in the mixture in the anoxic tank 5 was measured,
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 68, the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured using the accumulated phosphoric acid phosphorus concentration in the mixed solution in the anaerobic tank 4. The concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and a predetermined target value. Adjusts the amount of organic matter supplied to the anaerobic tank 4 and keeps the phosphorus discharge rate constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

Embodiment 69 FIG. FIG. 69 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 69 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. In FIG. 69, each component is the same as or equivalent to that shown in FIG. 5 and FIG. 67 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, (8.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to the sixty-ninth embodiment, the concentration of nitrate nitrogen in sewage and the concentration of nitrate in effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 69, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured and the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured using the accumulated data of the concentration of phosphoric acid. The concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and a predetermined target value. Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

Embodiment 70 FIG. FIG. 70 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 70 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment includes a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the device is configured to adjust the amount of sewage flowing into the first settling tank. It is composed. In FIG. 70, each component is the same as or equivalent to the component shown in FIG. 7 and FIG.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (8.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 70, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated data of the nitrate nitrogen concentration. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 70, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the accumulated data of the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured. The concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and a predetermined target value. Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

Embodiment 71 FIG. FIG. 71 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 71 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. In FIG. 71,
Each component is the same as or equivalent to that shown in FIG. 9 and FIG. 67 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, (8.1)
A signal having a value obtained according to a formula similar to the formula is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 71, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the seventy-first embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixture in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data in the mixture in the anaerobic tank 4 are used. The concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and a predetermined target value. Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 72 FIG. 72 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 72 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. In FIG. 72,
Each component is the same as or equivalent to the component shown in FIG. 11 and FIG.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, (8.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 72, the concentration of nitrate nitrogen in the discharge water is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 72, the anaerobic tank 4
The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the inside is measured, and the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is estimated using the accumulated phosphoric acid phosphorus concentration data. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 in accordance with the difference between the amount and the predetermined target value, and by adjusting the amount of sewage flowing into the anaerobic tank 4. Since the discharge amount is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 73 FIG. FIG. 73 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 73 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. FIG.
In FIG. 3, since each component is the same as or equivalent to that shown in FIG. 13 and FIG. 67 by the same reference numeral, detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, (8.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 73, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined in accordance with a difference from a predetermined target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 73, the anaerobic tank 4
The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the inside is measured, and the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is estimated using the accumulated phosphoric acid phosphorus concentration data. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 in accordance with the difference between the amount and the predetermined target value, and by adjusting the amount of sewage flowing into the anaerobic tank 4. Since the discharge amount is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 74 FIG. FIG. 74 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 74 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and the amount of sewage flowing into the anoxic tank by bypass. The apparatus is configured so as to adjust. Furthermore, the present embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank as a means for detecting the amount of discharged phosphorus, so as to adjust the amount of sewage flowing into the first settling tank. It constitutes the device. In FIG. 74, since each component is the same as or equivalent to the component shown in FIG. 15 and FIG.
Detailed description is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the sixty-sixth embodiment, the amount of sewage flowing into the first sedimentation basin 1 is adjusted. That is, (8.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the seventy-fourth embodiment, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this embodiment 74
According to the method, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured using the accumulated phosphoric acid phosphorus concentration data. Is estimated, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to the difference between the estimated value and a predetermined target value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted to supply the anaerobic tank 4. Since the amount of organic matter is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2; The device may be configured as follows.

Embodiment 75 FIG. FIG. 75 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 75 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. FIG.
In 5, 14 is a first sedimentation tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the discharged water; 135, a setting device for setting a target value of the phosphoric acid phosphorus concentration; This is a controller that outputs a signal for setting the amount of sewage flowing into the first settling basin 1 to a predetermined value in accordance with the difference from the target value set in the setter 135 to the first settling basin inflow pump 14. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 125 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a, the setter 135 via a signal line 135a, and the first settling tank inflow pump 14 via a signal line 125a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The concentration of phosphoric acid in the effluent is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 125 via a signal line 146a. Further, the target value set in the setting device 135 is transmitted to the controller 125 via a signal line 135a.
Conveyed to. The controller 125 controls the anaerobic tank 4 according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value.
A signal is output that sets the amount of sewage flowing into the tank to a value obtained according to, for example, a formula similar to formula (12.1). The output of the controller 125 is supplied to the first settling tank inflow pump 1 via a signal line 125a.
It is conveyed to 4.

As described above, if the measured value of the phosphoric acid / phosphorus concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. 4 increases the amount of organic matter supplied. as a result,
The phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases first, and the amount of sewage flowing into the anaerobic tank 4 decreases. The organic matter supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the seventy-fifth embodiment, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to the difference from a predetermined target value. Anoxic tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 75, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage into the anaerobic tank 4. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowed sewage, and the amount of phosphorus discharged is kept constant. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. The effect of reliably reducing the amount of is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 76 FIG. FIG. 76 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 76 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 76, each component is the same as or equivalent to that shown in FIG. 3 and FIG. 75 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, (12.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 76, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 was measured.
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 76, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted according to the difference from a predetermined target value to adjust the amount of sewage to the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 77 FIG. 77 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 77 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 77, each component is the same as or equivalent to that shown in FIG. 5 and FIG. 75 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, (12.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the seventy-seventh embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the seventy-seventh embodiment, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage to the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 78 FIG. FIG. 78 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 78 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the discharged water as a means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the sedimentation tank first. This is a device configuration. In FIG. 78,
Each component is the same as or equivalent to that shown in FIG. 7 and FIG. 75 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (12.1) is output to the first settling tank inflow pump 14.

As described above, according to the seventy-eighth embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 78, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 79 FIG. FIG. 79 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 79 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 79, each component is the same as or equivalent to that shown in FIG. 9 and FIG. 75 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, (12.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the seventy-ninth embodiment, the concentration of the nitrate nitrogen in the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, according to this embodiment 79, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 80 FIG. FIG. 80 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 80 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 80, each component is the same as or equivalent to that shown in FIG. 11 and FIG. 75 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, (12.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the eighty-eighth embodiment, the concentration of nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 80, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 81 FIG. FIG. 81 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 81 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 81, each component is the same as or similar to that shown in FIG. 13 and FIG. 75 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, (12.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 81, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined according to the difference between the predetermined target value and the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 81, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value, and the anaerobic tank 4 is discharged. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of.

In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 82. FIG. 82 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 82 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and the amount of sewage flowing into the anoxic tank by bypass. The apparatus is configured so as to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 82, each component is shown in FIGS.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Further, as in the case of the seventy-fifth embodiment, the amount of sewage flowing into first settling basin 1 is adjusted. That is, (12.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 82, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this embodiment 82
According to the method, the concentration of the phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 are adjusted according to a difference from a predetermined target value. Thus, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained.

[0409] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 83 FIG. FIG. 83 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 83 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. FIG.
In 3, reference numeral 14 denotes a first sedimentation tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of the phosphoric acid phosphorus in the discharged water, and reference numeral 126 denotes a predetermined value of the amount of sewage flowing into the sedimentation tank 1 in accordance with the value measured by the phosphoric acid phosphorus concentration meter 146. The signal of the first settling tank inflow pump 14
Output to the controller. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 126 is connected to the signal line 14.
6a and the phosphoric acid phosphorus concentration meter 146 and the signal line 12
The first settling tank inflow pump 14 is connected via 6a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The concentration of phosphoric acid in the discharged water is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 126 via a signal line 146a. The controller 126 outputs a signal that sets the amount of sewage flowing into the sedimentation basin 1 to a value obtained according to, for example, a formula similar to the formula (13.1) according to the measured value of the phosphoric acid phosphorus concentration. The output of the regulator 126 is transmitted to the first settling tank inflow pump 14 via a signal line 126a.

[0413] From the above, the amount of sewage flowing into the sedimentation basin 1 increases and decreases according to how large the measured value of the phosphoric acid phosphorus concentration is, and the amount of sewage flowing into the anaerobic tank 4 increases and decreases. The amount of organic matter supplied to 4 increases or decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to this embodiment 83, the nitrate nitrogen concentration of the sewage in the mixture in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 83, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

[0415] In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 84. FIG. 84 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 84 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 84, each component is the same as or equivalent to that shown in FIG. 3 and FIG. 83 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (13.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 84, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 was measured,
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 84, the phosphoric acid phosphorus concentration of the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 85 FIG. FIG. 85 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 85 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank as a means for detecting the amount of denitrification,
The device is configured to regulate the amount of sewage flowing into the anoxic tank by bypass. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 85, each component is the same as or similar to that shown in FIG. 5 and FIG. 83 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (13.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the eighty-fifth embodiment, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the eighty-fifth embodiment, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 86 FIG. FIG. 86 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 86 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the discharged water as a means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the sedimentation tank first. This is a device configuration. In FIG. 86,
Each component is the same as or equivalent to that shown in FIG. 7 and FIG. 83 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to the same equation as the equation (13.1) is output to the settling tank inflow pump 14 first.

As described above, according to this embodiment 86, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 86, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 87 FIG. FIG. 87 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 87 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 87, each component is the same as or similar to that shown in FIG. 9 and FIG. 83 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (13.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 87, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 87, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 88 FIG. FIG. 88 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 88 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 88, each component is the same as or equivalent to that shown in FIG. 11 and FIG. 83 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (13.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 88, the concentration of the nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 88, the phosphoric acid phosphorus concentration of the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 89 FIG. FIG. 89 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 89 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 89, each component is the same as or equivalent to that shown in FIG. 13 and FIG. 83 by the same reference numeral, and therefore, detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (13.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 89, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total value of the total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 89, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 90 FIG. FIG. 90 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 90 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent as means for detecting the amount of phosphorus flowing out of the system, and adjusts the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as described above. In FIG. 90, each component is the same as or equivalent to that shown in FIG. 15 and FIG. 83 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 83, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (13.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 90, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this embodiment 90
According to the method, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. Since the amount of organic matter to be supplied is adjusted and the amount of phosphorus discharged is adjusted,
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 91 FIG. FIG. 91 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 91 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment includes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system,
The equipment is configured to control the amount of sewage flowing into the first settling basin. In FIG. 91, 14 is the first settling basin 1
This is a first settling tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the tank.

Reference numeral 141 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into the biological reaction tank 2;
137 is a setting device for setting the target value of the phosphoric acid phosphorus concentration of the discharge water, and 127 is the first settling tank 1 according to the difference between the measured value of the phosphoric acid phosphorus concentration meter 141 and the target value set in the setting device 137. This is a controller for outputting a signal for setting the inflow sewage amount of a predetermined value to the first settling tank inflow pump 14. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. Controller 12
7 is a phosphoric acid phosphorus concentration meter 14 via a signal line 141a.
1, the setting device 137 via a signal line 137a, and the first settling basin inflow pump 14 via a signal line 127a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the controller 127 via the signal line 141a. Further, the target value set in the setting device 137 is
is transmitted to the controller 127 via a. Controller 127
Is a value obtained according to a formula similar to the formula (14.1), for example, according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Output a signal. The output of the controller 127 is transmitted to the first settling tank inflow pump 14 via a signal line 127a.

From the above, the amount of sewage flowing into the first sedimentation basin 1 depends on how much the measured value of the concentration of phosphorous phosphorus in the sewage flowing into the biological reaction tank 2 is larger than the target value of the concentration of phosphoric acid phosphorus in the effluent. First settling basin 1
The amount of sewage flowing into the tank increases and decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases and decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to the nineteenth embodiment, the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 91, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling basin is determined according to a difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

[0449] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 92 FIG. FIG. 92 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 92 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 92, each component is the same as or equivalent to that shown in FIG. 3 and FIG. 91 by the same reference numeral, and therefore, detailed description thereof is omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (14.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to Embodiment 92, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 was measured,
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from a predetermined target value, the flow rate and concentration of the sewage flowing from outside the system are adjusted. Even if the value fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 92, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling basin is determined according to the difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 93 FIG. FIG. 93 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 93 of the present invention. This embodiment includes a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The apparatus is configured to regulate the amount of sewage flowing into the bypass. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 93, each component is the same as or equivalent to that shown in FIG. 5 and FIG. 91 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (14.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 93, the concentration of nitrate nitrogen in sewage and the concentration of nitrate nitrogen in effluent of a mixed solution in anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 93, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling basin is determined according to the difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 94 FIG. FIG. 94 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 94 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. further,
This embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus flowing from outside the system, and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured so as to adjust. In FIG. 94, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 91 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (14.1) is first output to the settling tank inflow pump 14.

As described above, according to the ninety-fourth embodiment, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the ninety-fourth embodiment, the concentration of the phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling basin is determined in accordance with the difference between the predetermined value and the target value of the concentration of the phosphoric acid in the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 95 FIG. FIG. 95 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 95 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin is first measured. The device is configured to regulate the amount of sewage. In FIG. 95, each component is the same as or equivalent to that shown in FIG. 9 and FIG. 91 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (14.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the ninety-fifth embodiment, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage that flows into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the ninety-fifth embodiment, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first sedimentation basin is determined according to a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 96 FIG. FIG. 96 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 96 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows.
Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 96, each component is the same as or equivalent to that shown in FIG. 11 and FIG. 91 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (14.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 96, by measuring the concentration of nitrate nitrogen in the effluent and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 96, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first sedimentation basin is determined in accordance with a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 97 FIG. FIG. 97 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 97 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 97, each component is the same as or equivalent to that shown in FIG. 13 and FIG. 91 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (14.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 97, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined in accordance with a predetermined difference from the target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 97, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first sedimentation basin is determined according to a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained.

[0473] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 98 FIG. FIG. 98 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 98 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 98, each component is the same as or equivalent to that shown in FIG. 15 and FIG. 91 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (14.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 98, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, in this embodiment 98
According to the method, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined in accordance with a difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharged water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is adjusted. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.

In this embodiment, the amount of nitrogen flowing from the outside of the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 99 FIG. FIG. 99 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 99 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, the present embodiment includes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system,
The equipment is configured to control the amount of sewage flowing into the first settling basin. In FIG. 99, 14 is the first sedimentation basin 1
This is a first settling tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the tank.

Reference numeral 141 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2.
Reference numeral 128 denotes a controller which outputs a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value in accordance with the measurement value of the phosphoric acid phosphorus concentration meter 141 to the first sedimentation tank inflow pump 14. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. The controller 128 is connected to the phosphoric acid phosphorus concentration meter 141 via a signal line 141a and to the first sedimentation tank inflow pump 14 via a signal line 128a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. The concentration of the phosphoric acid in the influent water is measured by the phosphoric acid concentration meter 141, and the measured value is transmitted to the controller 128 via the signal line 141a. The controller 128 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 by bypass in accordance with the measured value of the phosphoric acid phosphorus concentration, for example, according to a formula similar to the formula (15.1). The output of the regulator 128 is transmitted to the first settling tank inflow pump 14 via a signal line 128a. From the above, the amount of sewage flowing into the first sedimentation basin 1 increases and decreases according to how large the measured value of the phosphoric acid phosphorus concentration is, so that the amount of sewage flowing into the anaerobic tank 4 increases and decreases. The supply of organic matter increases or decreases. as a result,
The phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to the ninety-ninth embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the tank 5 by the bypass, the oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to the ninety-ninth embodiment, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted according to the measured value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained.

[0482] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 100 FIG. 100 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 100 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The apparatus is configured as described above. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 100, each component is the same as or equivalent to that shown in FIG. 3 and FIG. 99 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (15.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to Embodiment 100, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the bypass, the amount of nitrogen flowing out of the system can be ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. Furthermore, according to this embodiment 100, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted according to the measured value, and the amount is adjusted to anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained.

In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 101 FIG. 101 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 101 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to regulate the amount of sewage flowing into the bypass. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin is first measured. The device is configured to regulate the amount of sewage. FIG.
In FIG. 5, each component is the same as or equivalent to that shown in FIG. 5 and FIG.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (15.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to Embodiment 101, the concentration of nitrate nitrogen in sewage and the concentration of nitrate nitrogen in effluent in a mixed solution in anoxic tank 5 are measured, and the difference between them is determined. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to Embodiment 101, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the sedimentation basin 1 is first adjusted according to the measured value, and the sewage is supplied to the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained.

[0490] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the total phosphorus concentration is measured. The device may be configured.

Embodiment 102. FIG. 102 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 102 of the present invention. This embodiment includes a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage that flows into the anoxic tank by bypass. This is a device configuration. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 102, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 99 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to the same equation as the equation (15.1) is output to the settling tank inflow pump 14 first.

As described above, according to Embodiment 102, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 102, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the first sedimentation basin 1 is adjusted according to the measured value to adjust the anaerobic tank 4.
The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be produced is obtained.

[0494] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 103 FIG. 103 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 103 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 103, each component is the same as or equivalent to that shown in FIG. 9 and FIG. 99 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (15.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 103, the nitrate nitrogen concentration of the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from the predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 103, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted according to the measured value, and the amount is adjusted to anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent, but the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 104 FIG. FIG. 104 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 104 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage that flows into the anoxic tank by bypass. The device is configured as follows. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 104, each component is the same as or similar to that shown in FIG. 11 and FIG. 99 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (15.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to Embodiment 104, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 104, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted according to the measured value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained.

[0502] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 105. FIG. FIG. 105 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 105 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 105, each component is the same as or equivalent to that shown in FIG. 13 and FIG. 99 with the same reference numeral, and therefore, detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (15.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 105, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 105, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted in accordance with the measured value, and the amount is adjusted to anaerobic tank 4. Anaerobic tank 4
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuates can be obtained. .

[0506] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. However, the amount of nitrate nitrogen is measured. The device may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 106 FIG. FIG. 106 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 106 of the present invention. This embodiment is provided with a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and measures the amount of sewage bypassed to the anoxic tank. The device is configured to adjust. Further, the present embodiment is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the flow into the first sedimentation basin. The device is configured to regulate the amount of sewage. In FIG. 106, each component is the same as or equivalent to that shown in FIG. 15 and FIG. 99 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the ninety-ninth embodiment, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (15.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 106, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, in Embodiment 10
According to No. 6, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably determined. The effect that can be reduced is obtained.

[0510] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2, but the amount of nitrate nitrogen is measured. An apparatus may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

[0511] Embodiment 107 FIG. 107 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 107 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the mixed solution in the sewage, the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device (hereinafter referred to as biological (Referred to as the amount of sewage flowing into a target water treatment device). In FIG. 107, reference numeral 15 denotes an inflow pump (first sedimentation basin inflow water amount adjusting means) for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

[0512] Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4.
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
Reference numeral 121 denotes the measured value of the phosphoric acid phosphorus concentration meter 142 and the setting device 1
A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the difference from the target value set to 31 to the arithmetic unit 200. The controller 200 outputs the output value of the controller 21 and the controller 121.
(A first-stage sedimentation basin inflow water regulation signal output means) that outputs to the inflow pump 15 a signal that sets the inflow sewage amount into the biological water treatment apparatus to a predetermined value in accordance with the output value of The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The controller 121 includes a phosphoric acid phosphorus concentration meter 142 via a signal line 142a and the setting unit 1 via a signal line 131a.
31. The arithmetic unit 200 is connected to the signal line 21b.
And the controller 121 via the signal line 121a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142.
Is measured by the controller 1 via the signal line 142a.
21. Further, the target value set in the setting device 131 is transmitted to the controller 121 via the signal line 131a. The controller 121 calculates the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to a formula similar to the formula (8.1). Is output. The output of the adjuster 121 is transmitted to the arithmetic unit 200 via the signal line 121a.

[0514] The arithmetic unit 200 obtains the amount of sewage flowing into the biological water treatment apparatus in accordance with, for example, the following equation (24.1) according to the output value of the controller 21 and the output value of the controller 121. Outputs a signal as a value. _{Q pri = Q ana + Q ano} (24.1) where, Q _pri: inflow volume of sewage to biological water treatment device Q _ana: inflow volume of sewage to the anaerobic tank 4 Q _ano: Bypass the anoxic tank 5 The output of the inflow sewage amount calculator 200 is transmitted to the inflow pump 15 via the signal line 200a.

As described above, when the measured value of the nitrate nitrogen concentration is larger than the target value, the inflow sewage Q _pri to the biological water treatment apparatus increases and the bypass inflow sewage Q _ano to the anoxic tank 5 increases. And the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the inflow sewage Q _pri to the biological water treatment apparatus decreases and the bypass inflow sewage Q _ano to the anoxic tank 5 decreases. In addition, the amount of organic matter supplied to the oxygen-free tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment apparatus _Qpri increases, and the amount of sewage flowing into the sedimentation basin 1 increases. The amount of inflow sewage _Qana into the anaerobic tank 4 increases, and the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage inflow to the biological water treatment device _Qpri decreases, and the amount of sewage inflow to the sedimentation basin 1 decreases. The amount of wastewater _Qana flowing into the tank 4 decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to Embodiment 107, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free oxygen concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 107, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the biological water treatment apparatus is determined according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus was kept constant, so that the flow rate and concentration of the sewage flowing from outside the system fluctuated. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Further, in Embodiment 10
According to 7, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment device, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

[0517] Embodiment 108 FIG. 108 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 108 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the phosphorus discharge amount in an anaerobic tank. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in sewage in a mixed solution, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into biological water treatment equipment It was done.
In FIG. 108, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 22 and the output value of the controller 121. It is. Arithmetic unit 200 includes signal line 22a via signal line 22b and controller 1 via signal line 121a.
21 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 107, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 108, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 108, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the concentration of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus flowing out of the system even when it fluctuates can be obtained. Also, according to this embodiment 108,
Since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank 5 is not affected. The effect of being able to adjust the amount of sewage flowing into the bypass is obtained. Further, according to the embodiment 108, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 109 FIG. 109 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 109 of the present invention. This embodiment includes a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixture in the oxygen-free tank as means for detecting the amount of denitrification. As a means for detecting sewage, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank is provided. The device is configured to regulate the amount of water. In FIG. 109, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 23 and the output value of the controller 121. It is. Arithmetic unit 20
0 is the signal line 23a via the signal line 23b and the signal line 1
The controller 121 is connected to the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 5 and 107, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 109, the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to Embodiment 109, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the concentration of the sewage in the mixed solution in the anaerobic tank 4 flows into the biological water treatment apparatus according to a difference from a predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the anaerobic tank 4
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates can be obtained. . In addition, according to Embodiment 109, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Furthermore, according to Embodiment 109, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 110 FIG. FIG. 110 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 110 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The system is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in sewage in sewage, and is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment. It is. Figure 110
In FIG. 7, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 107 with the same reference numeral, and a detailed description thereof is omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 110, the concentration of nitrate nitrogen in sewage in the mixed solution in anoxic tank 5 is measured, and the concentration of nitrate nitrogen is measured using accumulated nitrate nitrogen data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 110, the concentration of phosphoric acid and phosphorus in sewage in the mixed solution in anaerobic tank 4 is measured, and the concentration of sewage into biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus flowing out of the system even when it fluctuates can be obtained. In addition, according to this embodiment 110, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, the first embodiment
According to 10, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, so that the amount of organic matter supplied to the anoxic tank 5 is not affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

Embodiment 111 FIG. 111 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 111 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the liquid, and the device was configured to regulate the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the biological water treatment device. Things.
In FIG. 111, reference numeral 200 denotes an arithmetic unit which outputs a signal for adjusting the amount of sewage flowing into the biological water treatment apparatus to the inflow pump 15 in accordance with the output value of the controller 24 and the output value of the controller 121. The arithmetic unit 200 includes a signal line 24a via a signal line 24b and a controller 121 via a signal line 121a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS. 9 and 107.
Detailed description is omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 111, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 111, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the concentration of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus flowing out of the system even when it fluctuates can be obtained. Also,
According to the embodiment 111, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to Embodiment 111, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 112 FIG. FIG. 112 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 112 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the liquid, and the device was configured to regulate the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the biological water treatment device. Things.
In FIG. 112, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 25 and the output value of the controller 121. It is. Arithmetic unit 200 includes signal line 25a via signal line 25b and controller 1 via signal line 121a.
21 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 107, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 112, the concentration of the nitrate nitrogen in the effluent is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 112, the concentration of the phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the concentration of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus flowing out of the system even when it fluctuates can be obtained. Further, according to the embodiment 112, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. further,
According to Embodiment 112, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 113. FIG. 113 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 113 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the mixed solution in the sewage, and controls the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is what constituted. In FIG. 113, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 121. It is. The arithmetic unit 200 is connected to the signal line 26a via the signal line 26b, the controller 121 via the signal line 121a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 13 and 107, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 113, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 113, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass.
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 113, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the concentration of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus flowing out of the system even when it fluctuates can be obtained. In addition, according to the embodiment 113, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to Embodiment 113, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0537] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured.

Embodiment 114 FIG. FIG. 114 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 114 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the mixed solution in the sewage, and controls the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is what constituted. In FIG. 114, a computing unit 200 outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 121. It is. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the controller 121 via the signal line 121a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 15 and 107, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 107, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 114, the total nitrogen concentration of sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the eleventh embodiment
According to 4, the concentration of phosphoric acid and phosphorus in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with a difference from a predetermined target value to adjust the amount of sewage. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus flowing out of the furnace is obtained. In addition, according to the embodiment 114, since the amount of sewage flowing into the biological water treatment apparatus and the amount of sewage bypassed into the anoxic tank 5 are adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to Embodiment 114, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing from the outside of the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 115 FIG. FIG. 115 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 115 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipped with an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed liquid inside the device, and configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device It was done. FIG.
Reference numeral 15 is an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

Further, reference numeral 152 denotes an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, reference numeral 132 denotes a setting device for setting a target value of the oxidation-reduction potential, and reference numeral 122 denotes an oxidation-reduction potentiometer 152 A controller for outputting to the arithmetic unit 200 a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the difference between the measured value of the anaerobic tank 4 and the target value set in the setting unit 132;
Is an arithmetic unit that outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 21 and the output value of the controller 122. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The controller 122 is connected to the oxidation-reduction potentiometer 15 via a signal line 152a.
2 and the setting device 132 via a signal line 132a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the controller 122 via the signal line 122a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured by an oxidation-reduction potentiometer 152, and the measured value is transmitted to the controller 122 via a signal line 152a. The target value set in the setting device 132 is
The signal is transmitted to the controller 122 via the signal line 132a. The controller 122 calculates the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the oxidation-reduction potential and a predetermined target value, for example, with a value obtained according to a formula similar to the formula (9.1). Output a signal. The output of the controller 122 is transmitted to the arithmetic unit 200 via the signal line 122a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 122, for example, according to the equation (24.1). Output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

[0546] From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the measured value of the oxidation-reduction potential is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus increases, and the amount of sewage flowing into the sedimentation basin 1 increases first. The amount of water increases, and the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the oxidation-reduction potential is smaller than the target value, the amount of sewage flowing into the biological water treatment apparatus decreases, and the amount of sewage flowing into the sedimentation basin 1 decreases first. And the amount of organic matter supplied to the anaerobic tank 4 is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to Embodiment 115, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to the difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to Embodiment 115, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the anaerobic tank 4.
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates can be obtained. . Further, according to Embodiment 115, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to Embodiment 115, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 116. FIG. FIG. 116 is a configuration diagram showing a control device of the biological water treatment apparatus according to the embodiment 116 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the phosphorus discharge amount in an anaerobic tank. Equipped with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device It is. Reference numeral 200 denotes an arithmetic unit that outputs a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 22 and the output value of the controller 121 to the inflow pump 15. Arithmetic unit 2
00 is connected to the signal line 22a via the signal line 22b, the controller 122 via the signal line 122a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 115, and a detailed description thereof is omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 116, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 116, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidation-reduction potential of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 116, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 116, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 117. FIG. FIG. 117 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 117 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, A redox potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank is provided as a means for detecting the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The device is configured to adjust. In FIG. 117, reference numeral 200 denotes the controller 23.
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 122 and the output value of the controller 122. The arithmetic unit 200 is connected to the signal line 23a via the signal line 23b, the controller 122 via the signal line 122a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 5 and 115, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 117, the concentration of nitrate nitrogen in sewage and the concentration of nitrate in effluent in the mixed solution in anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 117, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidation-reduction potential of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 117, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 117, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 118 FIG. FIG. 118 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 118 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. It has an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage inside, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. . In FIG. 118, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 118, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the nitrate nitrogen concentration data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 118, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidation-reduction potential of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant, so the flow rate and concentration of sewage flowing from outside the system fluctuate. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to the embodiment 118, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, the eleventh embodiment
According to 8, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

Embodiment 119 [0556] FIG. FIG. 119 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 119 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of discharged phosphorus, mixing in the anaerobic tank. An oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the liquid is provided, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. is there. FIG.
, 200 is the output value of the controller 24 and the controller 122
And outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment device to a predetermined value in accordance with the output value of the biological water treatment device. The arithmetic unit 200 includes a signal line 24a via a signal line 24b, a controller 122 via a signal line 122a,
It is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 9 and 115, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 119, the nitrate nitrogen concentration of the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined in accordance with the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 119, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidation-reduction potential of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to the embodiment 119, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Further, according to the embodiment 119, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 120 FIG. FIG. 120 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 120 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of discharged phosphorus, mixing in the anaerobic tank. An oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the liquid is provided, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. is there. FIG.
, 200 is the output value of the controller 25 and the controller 122
And outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment device to a predetermined value in accordance with the output value of the biological water treatment device. The arithmetic unit 200 includes a signal line 25a via a signal line 25b, a controller 122 via a signal line 122a,
It is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 115, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 120, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 120, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidation-reduction potential of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 120, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 120, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0564] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. Good.

Embodiment 121 FIG. FIG. 121 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 121 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed liquid inside the device, and configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device It was done. In FIG. 121, a computing unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 122. It is. The arithmetic unit 200 is connected to the signal line 26b.
And the controller 122 via the signal line 122a and the inflow pump 15 via the signal line 200a. Other components are shown in FIGS.
5 are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 121, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined in accordance with a predetermined difference from the target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 121, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the oxidation-reduction potential of the sewage into the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant, so the flow rate and concentration of sewage flowing from outside the system fluctuate. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, this Embodiment 12
According to 1, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted without affecting the amount of organic substances supplied to the anaerobic tank 4. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass is obtained. Further, according to the embodiment 121, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0568] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 122 FIG. FIG. 122 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 122 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed liquid inside the device, and configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device It was done. In FIG. 122, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 122. It is. The arithmetic unit 200 is connected to the signal line 27b
Is connected to the controller 122 via the signal line 122a and the inflow pump 15 via the signal line 200a. Other components are shown in FIGS.
5 are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 115, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 122, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, in Embodiment 12
According to 2, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to a difference from a predetermined target value to adjust the sewage. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus flowing out can be obtained. Also,
According to this embodiment 122, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to Embodiment 122, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0572] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 123 FIG. FIG. 123 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 123 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the inside, so as to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment This is a device configuration. In FIG. 123, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

[0574] A phosphorus content measuring device 162 measures the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4.
Reference numeral 33 denotes a setter for setting a target value of the phosphorus content, and 123 denotes the amount of sewage flowing into the anaerobic tank 4 according to the difference between the measured value of the phosphorus content measuring device 162 and the target value set in the setter 133. A controller for outputting a signal having a predetermined value to the arithmetic unit 200;
Reference numeral 200 denotes an arithmetic unit that outputs a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 21 and the output value of the controller 123 to the inflow pump 15.
The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The controller 123 includes a phosphorus content measuring device 162 via a signal line 162a and a setting device 13 via a signal line 133a.
3 is connected. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the controller 123 via the signal line 123a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured by a phosphorus content measuring device 162, and the measured value is sent to the controller 12 via a signal line 162a.
It is conveyed to 3. Further, the target value of the phosphorus content set in the setting device 133 is adjusted by the controller 12 via the signal line 133a.
It is conveyed to 3. The controller 123 adjusts the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphorus content and a predetermined target value, for example, according to a formula similar to the formula (10.1). Output a signal. The output of the controller 123 is transmitted to the arithmetic unit 200 via the signal line 123a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 123 according to, for example, the equation (24.1). And output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the measured value of the phosphorus content is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 increases and the anaerobic tank 4
And the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphorus content is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases.
The supply of organic matter to the plant is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the embodiment 123, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 123, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the mixture is determined based on a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to the embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Further, in Embodiment 12
According to 3, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

Embodiment 124 FIG. FIG. 124 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 124 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. A device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixture is provided, and the device is adjusted to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment. It is composed. In FIG. 124, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 22 and the output value of the controller 123. It is. The arithmetic unit 200 includes a signal line 22a via a signal line 22b and a controller 12 via a signal line 123a.
3 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 123, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 124, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 124, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the amount of the phosphorus stored in the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Therefore, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the value fluctuates is obtained. Also, according to this embodiment 124,
Since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank 5 is not affected. The effect of being able to adjust the amount of sewage flowing into the bypass is obtained. Further, according to the embodiment 124, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 125 FIG. FIG. 125 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 125 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank as a means of detecting sewage and by-flow into the anoxic tank and into the biological water treatment equipment The device is configured to regulate the amount of sewage. In FIG. 125, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 23 and the output value of the controller 123. It is. Arithmetic unit 200
Are connected to the signal line 23a via the signal line 23b and the signal line 12
The controller 123 is connected via 3a and the inflow pump 15 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 125, the concentration of nitrate nitrogen in sewage and the concentration of nitrate nitrogen in effluent of a mixed solution in anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 125, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the amount of phosphorus accumulated in the biological water treatment apparatus is determined according to a difference from a predetermined target value. The anaerobic tank 4 is adjusted by adjusting the inflow sewage amount and the inflow sewage amount into the anaerobic tank 4.
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates can be obtained. . In addition, according to Embodiment 125, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Furthermore, according to Embodiment 125, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 126 FIG. FIG. 126 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 126 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. Equipped with a phosphorus content measuring device to measure the phosphorus content of phosphorus-accumulating bacteria in water, and configured the device to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment Things. In FIG. 126, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 123 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 126, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 126, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage and the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. Therefore, the effect that the amount of phosphorus flowing out of the system can be reliably reduced even when the value fluctuates. In addition, according to Embodiment 126, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, the first embodiment
According to 26, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, so that the amount of organic matter supplied to the anoxic tank 5 is not affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

Embodiment 127 FIG. FIG. 127 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 127 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of discharged phosphorus, mixing in the anaerobic tank. Equipped with a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment. It was done. In FIG. 127, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 24 and the output value of the controller 123. It is. The arithmetic unit 200 includes the signal line 24a via the signal line 24b and the controller 12 via the signal line 123a.
3 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 9 and 123, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 127, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage that flows into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 127, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the amount of the phosphorus accumulating bacteria is supplied to the biological water treatment apparatus according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Therefore, the effect that the amount of phosphorus flowing out of the system can be surely reduced even when the value fluctuates is obtained. Also,
According to this embodiment 127, the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 127, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0591] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. Good.

Embodiment 128 FIG. FIG. 128 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 128 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of discharged phosphorus, mixing in the anaerobic tank. Equipped with a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment. It was done. In FIG. 128, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 25 and the output value of the controller 123. It is. The arithmetic unit 200 includes a signal line 25a via a signal line 25b and a controller 12 via a signal line 123a.
3 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 123, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 128, the nitrate nitrogen concentration of the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 128, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Therefore, the effect that the amount of phosphorus flowing out of the system can be surely reduced even when the value fluctuates is obtained. According to the embodiment 128, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. further,
According to this embodiment 128, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 129. FIG. 129 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 129 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the inside, so as to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment This is a device configuration. In FIG. 129, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 123. It is. The arithmetic unit 200 is connected to the signal line 26a via the signal line 26b, the controller 123 via the signal line 123a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 13 and 123, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 129, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined according to the difference from the target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 129, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the amount of the phosphorus accumulated in the biological water treatment apparatus is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflow sewage and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Therefore, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the value fluctuates can be obtained. In addition, according to this embodiment 129, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Further, according to the embodiment 129, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 130 FIG. FIG. 130 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 130 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the inside, so as to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment This is a device configuration. In FIG. 130, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 123. It is. Arithmetic unit 200 is connected to signal line 27a via signal line 27b, controller 123 via signal line 123a, and inflow pump 15 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 15 and 123, and a detailed description thereof will be omitted.

The operation will now be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 123, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 130, the total nitrogen concentration of sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the thirteenth embodiment
According to 0, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus flowing out can be obtained. Further, according to this embodiment 130, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 130, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0603] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured.

Embodiment 131 FIG. FIG. 131 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 131 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipped with a device to calculate the difference between the concentration of phosphoric acid phosphorus in the sewage in the mixed solution and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank. The apparatus is configured to adjust the amount of sewage flowing into the apparatus. In FIG. 131, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

Numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4.
141 is a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2; A calculator 134 for calculating the difference between the concentration of phosphoric acid and the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 A setting device for setting a value, 124 is a computing device 1
A controller that outputs a signal for setting the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with a difference between the calculated value of 81 and the target value set in the setter 134 to the calculator 200.
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 124 and the output value of the controller 124. The phosphoric acid concentration meter 142 is provided in the anaerobic tank 4, and the phosphoric acid concentration meter 1
41 is provided in the pipe b. The arithmetic unit 181 is connected to the phosphoric acid concentration meter 142 via a signal line 142a and to the phosphoric acid concentration meter 141 via a signal line 141a. The adjuster 124 is connected to the arithmetic unit 181 via a signal line 181a and to the setting unit 134 via a signal line 134a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b and the controller 12 via the signal line 124a.
4 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value of the nitrate nitrogen concentration set in the setter 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is transmitted to the inflow-anoxic-tank bypass inflow pump 12 via the signal line 21a, and is also transmitted to the arithmetic unit 200 via the signal lines 21a and 21b. Anaerobic tank 4
The phosphoric acid phosphorus concentration of the sewage in the mixed solution is measured by the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the calculator 181 via the signal line 142a. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 1.
The measured value is transmitted at 41, and the measured value is transmitted to the arithmetic unit 181 via the signal line 141a. The arithmetic unit 181 has, for example, (1
According to the formula 1.1), the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is calculated.

The operation value of the operation unit 181 is calculated by the signal line 181a.
To the regulator 124 via The setting device 13
The target value set to 4 is transmitted to the controller 124 via the signal line 134a. The controller 124 calculates a difference between the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 and a predetermined target value. In accordance with the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained according to, for example, a formula similar to the formula (11.2). The output of the adjuster 124 is transmitted to the calculator 200 via the signal line 124a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 124 according to, for example, the equation (24.1). Output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the calculated value of the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is smaller than a target value, the processing proceeds to the biological water treatment apparatus. The amount of sewage flowing into the anaerobic tank 4 increases due to an increase in the amount of sewage flowing into the anaerobic tank 4 and an increase in the amount of sewage flowing into the sedimentation basin 1.
The amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge increases, and the phosphorus removal amount increases. Conversely, anaerobic tank 4
Phosphoric Acid Phosphorus Concentration of Sewage in Biological Mixture and Biological Reaction Tank 2
If the calculated value of the difference between the concentration of phosphoric acid and the concentration of phosphoric acid in the sewage flowing into the sewage is larger than the target value, the amount of sewage flowing into the biological water treatment device decreases, and the amount of sewage flowing into the first sedimentation basin 1 decreases. As a result, the amount of sewage flowing into the anaerobic tank 4 decreases,
The supply of organic matter to the plant is reduced. As a result, the phosphorus discharge is reduced, and the phosphorus removal amount is reduced.

As described above, according to the embodiment 131, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 131, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the calculated value of the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus according to a difference from a predetermined target value and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to the embodiment 131, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 131, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 132. FIG. 132 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 132 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. A device for calculating the difference between the concentration of phosphoric acid in the mixture and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2; The device is configured to regulate the amount of inflow sewage. In FIG. 132,
Reference numeral 200 denotes an arithmetic unit that outputs a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value to the inflow pump 15 according to the output value of the controller 22 and the output value of the controller 124.
The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b.
And a controller 124 via a signal line 124a, and a signal line 2
00a is connected to the inflow pump 15. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 131, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 132, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential of the mixed liquid in the oxygen-free tank 5 is determined according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 132, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the value and a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4. However, since the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to the embodiment 132, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to Embodiment 132, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 133 FIG. FIG. 133 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 133 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, And a device for calculating the difference between the concentration of phosphoric acid in the mixture in the anaerobic tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2. And an apparatus for controlling the amount of sewage flowing into a biological water treatment apparatus. In FIG. 133, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 23 and the output value of the controller 124. It is. The arithmetic unit 200 is connected to the signal line 23b.
And the controller 124 via the signal line 124a and the inflow pump 15 via the signal line 200a. Other components are shown in FIGS.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 133, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen of the discharge water in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 133, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the value and a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4. However, since the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 133, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 133, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 134 FIG. 134 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 134 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. A device for calculating the difference between the concentration of phosphoric acid in the water and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2; The device is configured to regulate the amount of water. In FIG. 134, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 131 by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 134, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated data of the nitrate nitrogen concentration. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 134, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the value and a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4. However, since the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 134, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to Embodiment 134, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 135 FIG. FIG. 135 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 135 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. A device for calculating the difference between the concentration of phosphoric acid in the liquid and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is provided. The device is configured to regulate the amount of sewage. In FIG. 135,
Reference numeral 200 denotes an arithmetic unit which outputs a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 24 and the output value of the controller 124 to the inflow pump 15.
The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b.
And a controller 124 via a signal line 124a, and a signal line 2
00a is connected to the inflow pump 15. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 9 and 131, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 135, the nitrate nitrogen concentration of the discharge water is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined in accordance with the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, according to this embodiment 135, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the value and the predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4.
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates can be obtained. . Further, according to this embodiment 135, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Further, according to the embodiment 135, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 136. FIG. 136 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 136 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. A device for calculating the difference between the concentration of phosphoric acid in the liquid and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is provided. The device is configured to regulate the amount of sewage. In FIG. 136,
Reference numeral 200 denotes an arithmetic unit that outputs a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 25 and the output value of the controller 124 to the inflow pump 15.
The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b.
And a controller 124 via a signal line 124a, and a signal line 2
00a is connected to the inflow pump 15. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 131, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 136, by measuring the concentration of nitrate nitrogen in the discharge water and adjusting the amount of sewage that flows into the anoxic tank 5 by bypass according to the measured value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 136, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured.
The amount of sewage flowing into the biological water treatment apparatus is adjusted according to the difference between the calculated value of the difference and a predetermined target value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted to supply the anaerobic tank 4. Since the amount of organic substances to be discharged is adjusted and the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 136, the amount of sewage flowing into the biological water treatment apparatus is adjusted, and the oxygen-free tank 5 is controlled.
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Furthermore, according to the embodiment 136, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 137. Embodiment 137. FIG. 137 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 137 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. A device for calculating the difference between the concentration of phosphoric acid in the mixed solution in the tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2; The device is configured to regulate the amount of sewage flowing into the tank. FIG.
7, reference numeral 200 denotes the output value of the controller 26 and the controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of No. 4. The arithmetic unit 200 includes a signal line 26a via a signal line 26b and a controller 124 via a signal line 124a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 13 and 131, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 137, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 137, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the value and a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4. However, since the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 137, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 137, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0631] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2, but the apparatus is designed to measure the ammonia nitrogen concentration. May be configured.

Embodiment 138. FIG. 138 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 138 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. A device for calculating the difference between the concentration of phosphoric acid in the mixed solution in the tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2; The device is configured to regulate the amount of sewage flowing into the tank. FIG.
8, 200 is the output value of the controller 27 and the controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of No. 4. The arithmetic unit 200 includes a signal line 26a via a signal line 27b and a controller 124 via a signal line 124a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 15 and 131, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. In addition, as in the case of Embodiment 131, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 138, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the thirteenth embodiment
According to 8, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the calculated value of the difference between them and a predetermined target The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus in accordance with the difference from the value and the amount of sewage flowing into the anaerobic tank 4 to adjust the amount of phosphorus discharged. Since it is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 138, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Further, the thirteenth embodiment
According to 8, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 139. Embodiment 139. FIG. 139 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 139 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipment for estimating the concentration of phosphoric acid and phosphorus in sewage in the mixed liquid in the system, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is. In FIG. 139, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

[0637] Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4.
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
Reference numeral 171 denotes a storage circuit for storing data of the concentration of phosphoric acid and phosphorus in the mixed solution in the anaerobic tank 4. Calculator for estimating the phosphoric acid phosphorus concentration of
Reference numeral 121 denotes the estimated value of the phosphoric acid phosphorus concentration meter 142 and the setting device 1
A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the difference from the target value set to 31 to the arithmetic unit 200. The controller 200 outputs the output value of the controller 21 and the controller 121.
And outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment device to a predetermined value in accordance with the output value of the biological water treatment device. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The storage circuit 171 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a. The arithmetic unit 182 is connected to the storage circuit 171 via the signal line 171a. The controller 121 includes an arithmetic unit 182 via a signal line 182a and a setting unit 1 via a signal line 131a.
31. The arithmetic unit 200 is connected to the signal line 21b.
And the controller 121 via the signal line 121a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142.
, And the measured value is transmitted to the storage circuit 171 via the signal line 142a. The arithmetic unit 182 includes a storage circuit 171
The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time is estimated using the phosphoric acid phosphorus concentration data accumulated in the tank. This can be easily performed using a statistical analysis method such as the least square method. The data of the phosphoric acid concentration required for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the arithmetic unit is the signal line 18
It is transmitted to the controller 121 via 2a. Further, the target value set in the setting device 131 is transmitted to the controller 121 via the signal line 131a. The controller 121 calculates the amount of sewage flowing into the anaerobic tank 4 according to a difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to a formula similar to the formula (8.1). Is output. The output of the controller 121 is supplied to a computing unit 200 via a signal line 121a.
Conveyed to.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 121, for example, with the value obtained according to the equation (24.1). Output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value,
As the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the first sedimentation basin 1 increases, the amount of sewage flowing into the anaerobic tank 4 increases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. To increase. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus decreases, and the amount of sewage flowing into the sedimentation basin 1 decreases. And the amount of organic matter supplied to the anaerobic tank 4 is reduced. As a result, phosphorus discharge decreases,
Phosphorus removal is reduced.

As described above, according to the embodiment 139, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 139, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated sewage in the mixed solution in the anaerobic tank 4 is measured using the stored data of the phosphoric acid phosphorus concentration. And adjusting the amount of sewage flowing into the biological water treatment apparatus to adjust the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and the predetermined target value. Adjusts the amount of organic matter supplied to the anaerobic tank 4 and keeps the discharge amount of phosphorus constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the biological water treatment apparatus can be reduced. An effect that can be reliably reduced is obtained. According to the embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 139, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 140 FIG. FIG. 140 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 140 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. The apparatus is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed liquid, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. . 140, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 22 and the output value of the controller 121. It is. The arithmetic unit 200 is connected to the signal line 22 via the signal line 22b.
a, the controller 121 via a signal line 121a, and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 139, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 140, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is determined according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 140, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the data of the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured. The concentration of phosphoric acid and phosphorus in the sewage, and adjusts the amount of sewage flowing into the biological water treatment apparatus according to the difference between the estimated value and a predetermined target value to adjust the amount of sewage flowing into the anaerobic tank 4. By controlling the amount of organic substances supplied to the anaerobic tank 4 and maintaining the discharge amount of phosphorus constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the biological water treatment apparatus is changed. The effect of reliably reducing the amount is obtained. Further, according to Embodiment 140, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. further,
According to this embodiment 140, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

Embodiment 141. FIG. 141 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 141 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, Equipped with a device for estimating the concentration of phosphoric acid and phosphorus in sewage in the mixed solution in the anaerobic tank as a means for detecting
The apparatus is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment apparatus. In FIG. 141, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 23 and the output value of the controller 121, and the inflow pump 1.
5 is an arithmetic unit for outputting the result. The arithmetic unit 200 is connected to the signal line 2
3b via the signal line 23a, the controller 121 via the signal line 121a, and the inflow pump 1 via the signal line 200a.
5 is connected. Other components are shown in FIG. 5 and FIG.
39 are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 141, the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixture in the anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 141, the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the data of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured using the accumulated data of the concentration of the phosphoric acid. Of the concentration of phosphoric acid and phosphorus in the sewage is adjusted, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the difference between the estimated value and a predetermined target value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus discharged from the biological water treatment apparatus, even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount is obtained. In addition, according to the embodiment 141, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 141, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 142. FIG. FIG. 142 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 142 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is provided with a device for estimating the concentration of phosphoric acid and phosphorus in the sewage therein, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. In FIG. 142, each component is the same as or equivalent to that shown in FIG. 7 and FIG. 139 with the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 142, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 142, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured and the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured using the accumulated data of the concentration of the phosphoric acid. Of the concentration of phosphoric acid and phosphorus in the sewage is adjusted, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the difference between the estimated value and a predetermined target value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus discharged from the biological water treatment apparatus, even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount is obtained. Further, according to the embodiment 142, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 142, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

Embodiment 143. Embodiment 143. FIG. 143 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 143 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is provided with a device for estimating the phosphoric acid phosphorus concentration of sewage in a liquid, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. In FIG. 143, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 24 and the output value of the controller 121. It is. The arithmetic unit 200 is connected to the signal line 24 via the signal line 24b.
a, the controller 121 via a signal line 121a, and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 9 and 139, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 143, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 143, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data in the mixed solution in the anaerobic tank 4 are used. The concentration of phosphoric acid and phosphorus in the sewage, and adjusts the amount of sewage flowing into the biological water treatment apparatus according to the difference between the estimated value and a predetermined target value to adjust the amount of sewage flowing into the anaerobic tank 4. By controlling the amount of organic substances supplied to the anaerobic tank 4 and maintaining the discharge amount of phosphorus constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the biological water treatment apparatus is changed. The effect of reliably reducing the amount is obtained. Further, according to this embodiment 143, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, in Embodiment 14
According to 3, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 144. FIG. 144 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 144 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is provided with a device for estimating the phosphoric acid phosphorus concentration of sewage in a liquid, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. 144, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 25 and the output value of the controller 121. It is. The arithmetic unit 200 is connected to the signal line 25 via the signal line 25b.
a, the controller 121 via a signal line 121a, and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 139, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 144, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 144, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the data of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured using the accumulated data of the concentration of phosphoric acid. The phosphoric acid phosphorus concentration of sewage
The amount of organic matter supplied to the anaerobic tank 4 by adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the estimated value and a predetermined target value and adjusting the amount of sewage flowing into the anaerobic tank 4 Is adjusted to keep the amount of phosphorus discharged constant, so that even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the biological water treatment apparatus can be obtained. In addition, according to the embodiment 144, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 144, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 145. Embodiment 145. FIG. 145 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 145 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipment for estimating the concentration of phosphoric acid and phosphorus in sewage in the mixed liquid in the system, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is. In FIG. 145, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 121. It is. The arithmetic unit 200 is connected to the signal line 26a via the signal line 26b and the controller 12 via the signal line 121a.
1 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 13 and 139, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 145, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 145, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data in the mixed solution in the anaerobic tank 4 are used. The concentration of phosphoric acid and phosphorus in the sewage, and adjusts the amount of sewage flowing into the biological water treatment apparatus according to the difference between the estimated value and a predetermined target value to adjust the amount of sewage flowing into the anaerobic tank 4. By controlling the amount of organic substances supplied to the anaerobic tank 4 and maintaining the discharge amount of phosphorus constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the biological water treatment apparatus is changed. The effect of reliably reducing the amount is obtained. Further, according to this embodiment 145, the amount of sewage flowing into the biological water treatment apparatus is adjusted, and
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to the embodiment 145, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing from the outside of the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured.

Embodiment 146. FIG. 146 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 146 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipment for estimating the concentration of phosphoric acid and phosphorus in sewage in the mixed liquid in the system, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is. In FIG. 146, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 121. It is. The arithmetic unit 200 includes a signal line 27a via a signal line 27b and a controller 12 via a signal line 121a.
1 and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 15 and 139, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 146, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, in Embodiment 14
According to 6, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured using the accumulated data of the phosphoric acid phosphorus concentration. The anaerobic tank 4 is estimated by estimating the concentration, adjusting the amount of sewage flowing into the biological water treatment apparatus according to the difference between the estimated value and a predetermined target value, and adjusting the amount of sewage flowing into the anaerobic tank 4. Adjusts the amount of organic material supplied to
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the biological water treatment apparatus can be obtained. In addition, according to this embodiment 146, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Further, the first embodiment
According to 46, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, so that the amount of organic matter supplied to the anoxic tank 5 is not affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

[0666] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured.

Embodiment 147. FIG. 147 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 147 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It was done. In FIG. 147, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

[0668] Reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent, 135 a setter for setting a target value of the phosphoric acid phosphorus concentration, and 125 a measured value of the phosphoric acid phosphorus concentration meter 146. An adjuster that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with a difference from the target value set in the setter 135 to the arithmetic unit 200. And a controller that outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment device to a predetermined value according to the output value of the device 125. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. Controller 12
5 is a phosphoric acid phosphorus concentration meter 14 via a signal line 146a.
6 and a setting device 135 via a signal line 135a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the controller 125 via the signal line 125a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The concentration of phosphoric acid in the effluent is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 125 via a signal line 146a. Further, the target value set in the setting device 135 is a signal line 135
is transmitted to the controller 125 via a. Controller 125
Calculates the amount of sewage flowing into the anaerobic tank 4 by, for example, (1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value.
2.1) Output a signal having a value obtained according to the same equation as the equation. The output of the adjuster 125 is transmitted to the arithmetic unit 200 via the signal line 125a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 125, for example, with the value obtained according to the equation (24.1). Output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the measured value of the phosphoric acid phosphorus concentration is larger than the target value,
As the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the first sedimentation basin 1 increases, the amount of sewage flowing into the anaerobic tank 4 increases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. To increase. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment apparatus decreases, and the amount of sewage flowing into the sedimentation basin 1 decreases first. And the amount of organic matter supplied to the anaerobic tank 4 is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the embodiment 147, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 147, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the difference from a predetermined target value to adjust the amount of sewage to the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of is obtained. Further, according to this embodiment 147, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 147, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 148. Embodiment 148. FIG. 148 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 148 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and configured to control the amount of wastewater flowing into the anoxic tank by-pass and the amount of wastewater flowing into the biological water treatment equipment It is. FIG.
8, 200 indicates the output value of the controller 22 and the controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of No. 5. The arithmetic unit 200 includes a signal line 22a via a signal line 22b and a controller 125 via a signal line 125a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 147.
Detailed description is omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 148, the oxidation-reduction potential of the sewage in the mixture in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 148, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with the difference from a predetermined target value to adjust the anaerobic tank 4 The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. Also,
According to this embodiment 148, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 148, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the discharged water. Good.

Embodiment 149. FIG. 149 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 149 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and is provided outside the system. As a means of detecting the amount of phosphorus that flows out, a phosphate phosphor concentration meter that measures the concentration of phosphoric acid in the effluent is provided. The device is configured to adjust. In FIG. 149, reference numeral 200 denotes a controller 2.
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 3 and the output value of the controller 125. The arithmetic unit 200 is
The signal line 23a and the signal line 125a are connected via the signal line 23b.
And the inflow pump 15 via the signal line 200a. Other components are shown in FIG.
147 and FIG. 147 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 149, the nitrate nitrogen concentration of the sewage and the nitrate concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 149, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with a difference from a predetermined target value to adjust the anaerobic tank 4 The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 149, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 149, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of the phosphoric acid in the effluent. Good.

Embodiment 150 FIG. 150 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 150 of the present invention. The present embodiment has a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and discharges the gas as a means for detecting the amount of phosphorus flowing out of the system. The system is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in water, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. . In FIG. 150, each component is the same as or similar to that shown in FIG. 7 and FIG.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 150, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 150, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. Further, according to the embodiment 150, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the oxygen-free tank 5 is adjusted.
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to the embodiment 150, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of the phosphoric acid in the effluent. Good.

Embodiment 151. Embodiment 151 FIG. 151 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 151 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. is there. FIG.
In FIG. 1, 200 is the output value of the controller 24 and the controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of No. 5. The arithmetic unit 200 includes a signal line 24a via a signal line 24b and a controller 125 via a signal line 125a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS. 9 and 147.
Detailed description is omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 151, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 151, the concentration of the phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. Also, in this embodiment 151
According to the method, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect of being able to adjust the amount of sewage flowing into the oxygen tank 5 by bypass is obtained. Furthermore, according to the embodiment 151, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect of being able to adjust the amount of sewage flowing into the anaerobic tank 4 without affecting is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 152. FIG. 152 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 152 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. is there. FIG.
2, the reference numeral 200 denotes the output value of the controller 25 and the controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of No. 5. The arithmetic unit 200 includes a signal line 25a via a signal line 25b and a controller 125 via a signal line 125a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 147, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 152, the concentration of nitrate nitrogen in the discharge water is measured, and the amount of sewage discharged into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 152, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to a difference from a predetermined target value to adjust the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus to be produced is obtained. Also, according to this embodiment 152,
Since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank 5 is not affected. The effect of being able to adjust the amount of sewage flowing into the bypass is obtained. Furthermore, according to the embodiment 152, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 153. FIG. 153 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 153 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It was done. In FIG. 153, reference numeral 200 designates a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 26 and the output value of the controller 125.
This is an arithmetic unit that outputs to The arithmetic unit 200 is connected to the signal line 26
b, a signal line 26a, a regulator 125 via a signal line 125a, and an inflow pump 15 via a signal line 200a.
Is connected to Other components are shown in FIG. 13 and FIG.
47 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 153, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 153, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus to be produced is obtained. According to the embodiment 153, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 153, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0697] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 154. FIG. 154 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 154 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It was done. In FIG. 154, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 125.
This is an arithmetic unit that outputs to The arithmetic unit 200 is connected to the signal line 27
b through the signal line 27a, the controller 125 through the signal line 125a, and the inflow pump 15 through the signal line 200a.
Is connected to Other components are shown in FIGS.
47 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of Embodiment 147, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 154, the total nitrogen concentration of the inflow water is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted in accordance with the measured value, whereby Since the amount of easily decomposable organic matter supplied to the tank 5 is adjusted, even when the amount or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the biological water treatment apparatus can be reliably reduced. Is obtained. Further, according to this embodiment 154, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with a difference from a predetermined target value to adjust the anaerobic tank 4 The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. Further, according to the embodiment 154, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free tank 5 is measured in accordance with the measured value.
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to the embodiment 154, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing from the outside of the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the biological water treatment apparatus is detected by measuring the concentration of phosphoric acid in the effluent. The device may be configured as follows.

Embodiment 155. Embodiment 155. FIG. 155 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 155 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It was done. In FIG. 155, 15 is an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

Also, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the discharged water, and reference numeral 126 denotes a predetermined amount of the amount of sewage flowing into the anaerobic tank 4 in accordance with the measurement value of the phosphoric acid phosphorus concentration meter 146. A controller that adjusts the output of the signal to be processed to the calculator 200. The controller 200 sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 21 and the output value of the controller 126. This is an arithmetic unit that outputs a signal to the inflow pump 15. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 126 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a. Arithmetic unit 200
Are connected to the signal line 21a via the signal line 21b and the signal line 12
The controller 126 is connected to the inflow pump 15 via a signal line 6a and the controller 126 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The concentration of phosphoric acid in the discharged water is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 126 via a signal line 146a. The controller 126 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained according to, for example, a formula similar to the formula (13.1) according to the measured value of the phosphoric acid phosphorus concentration. Controller 1
The output of 26 is transmitted to arithmetic unit 200 via signal line 126a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 126, for example, with the value obtained by the equation (24.1). Output a signal. The output of the arithmetic unit 200 is a signal line 200
a to the inflow pump 15.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
Depending on how large the measured value of the phosphoric acid phosphorus concentration is, the amount of sewage flowing into the biological water treatment apparatus increases and decreases, and the amount of sewage flowing into the sedimentation basin 1 increases and decreases.
The amount of sewage flowing into the tank increases and decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases and decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to this embodiment 155, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to the difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to the embodiment 155, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. To adjust the amount of organic matter supplied to the anaerobic tank 4,
Since the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 155, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 156. FIG. 156 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 156 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and configured to control the amount of wastewater flowing into the anoxic tank by-pass and the amount of wastewater flowing into the biological water treatment equipment It is. FIG.
6, 200 is the output value of the controller 22 and the controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of 6. The arithmetic unit 200 includes a signal line 22a via a signal line 22b and a controller 126 via a signal line 126a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS.
Detailed description is omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 156, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 156, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be ensured. The effect that can be reduced is obtained. According to this embodiment 156, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Further, according to the embodiment 156, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0712] In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 157. FIG. 157 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 157 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and is provided outside the system. As a means of detecting the amount of phosphorus that flows out, a phosphate phosphor concentration meter that measures the concentration of phosphoric acid in the effluent is provided. The device is configured to adjust. In FIG. 157, reference numeral 200 denotes the controller 2.
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 3 and the output value of the controller 126. The arithmetic unit 200 is
The signal line 23a and the signal line 126a are connected via the signal line 23b.
And the inflow pump 15 via a signal line 200a. Other components are shown in FIG.
155 and FIG. 155 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 157, the concentration of nitrate nitrogen in the sewage and the concentration of nitrate in the discharge water in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 157, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be ensured. The effect that can be reduced is obtained. Also, the first embodiment
According to 57, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass is obtained. Furthermore, according to the embodiment 157, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the discharged water. Good.

Embodiment 158. Embodiment 158. FIG. 158 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 158 of the present invention. The present embodiment has a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and discharges the gas as a means for detecting the amount of phosphorus flowing out of the system. The system is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in water, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. . In FIG. 158, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 158, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 158, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be ensured. The effect that can be reduced is obtained. In addition, according to the embodiment 158, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. further,
According to the embodiment 158, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 159. FIG. 159 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 159 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. is there. FIG.
9, reference numeral 200 denotes an output value of the controller 24 and the output value of the controller 12.
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of 6. The arithmetic unit 200 includes a signal line 24a via a signal line 24b and a controller 126 via a signal line 126a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS. 9 and 155,
Detailed description is omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 159, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the amount or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 159, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is ensured The effect that can be reduced is obtained. Further, according to this embodiment 159, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from a predetermined target value. Since the amount of the organic substance supplied to the tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 159, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0724] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 160 FIG. 160 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 160 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. is there. FIG.
At 0, 200 is the output value of controller 25 and controller 12
The arithmetic unit outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of 6. The arithmetic unit 200 includes a signal line 25a via a signal line 25b and a controller 126 via a signal line 126a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 11 and 155, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 160, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 160, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be ensured. The effect that can be reduced is obtained.
Further, according to Embodiment 160, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 160, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. You may comprise.

Embodiment 161. FIG. 161 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 161 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It was done. In FIG. 161, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 126.
This is an arithmetic unit that outputs to The arithmetic unit 200 is connected to the signal line 26
b via the signal line 26a, the controller 126 via the signal line 126a and the inflow pump 15 via the signal line 200a.
Is connected to Other components are shown in FIG. 13 and FIG.
55 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

[0731] As described above, according to this embodiment 161, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 161, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be ensured. The effect that can be reduced is obtained. Further, according to this embodiment 161, the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 161, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0732] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2, but the amount of ammonia nitrogen is measured. An apparatus may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 162. FIG. 162 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 162 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the effluent, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It was done. In FIG. 162, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 126.
This is an arithmetic unit that outputs to The arithmetic unit 200 is connected to the signal line 27
b via the signal line 27a, the controller 126 via the signal line 126a and the inflow pump 15 via the signal line 200a.
Is connected to Other components are shown in FIGS.
55 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 162, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . In addition, this embodiment 16
According to 2, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. Since the amount of organic matter supplied to the tank 4 is adjusted and the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Can be Also, according to this embodiment 162,
Since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank 5 is not affected. The effect of being able to adjust the amount of sewage flowing into the bypass is obtained. Further, according to the embodiment 162, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect of being able to adjust the amount of sewage flowing into the anaerobic tank 4 without affecting is obtained.

In this embodiment, the amount of nitrogen flowing from the outside of the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 163. FIG. 163 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 163 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing in from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for controlling the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The apparatus is configured as described above. In FIG. 163, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

[0738] Reference numeral 141 denotes a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2.
137 is a setting device for setting a target value of the concentration of the phosphoric acid in the effluent water. A signal for setting the inflow sewage amount to a predetermined value is calculated by the arithmetic unit 200.
The controller 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 21 and the output value of the controller 127. It is an arithmetic unit. Phosphoric acid concentration meter 141 is connected to piping b
It is provided in. The controller 127 is connected to the phosphoric acid phosphorus concentration meter 141 via a signal line 141a, and to the setting device 137 via a signal line 137a. Arithmetic unit 200
Are connected to the signal line 21a via the signal line 21b and the signal line 12
The controller 127 is connected to the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141.
Is measured by the controller 1 via the signal line 141a.
27. Further, the target value set in the setting device 137 is transmitted to the controller 127 via the signal line 137a. The controller 127 determines the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to a formula similar to the formula (14.1). Is output. The output of the adjuster 127 is transmitted to the arithmetic unit 200 via the signal line 127a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 127, for example, according to the equation (24.1). And output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

[0741] From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
The amount of sewage flowing into the biological water treatment system increases or decreases depending on how much the measured value of the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 is larger than the target value of the concentration of phosphoric acid phosphorus in the effluent. As the amount of sewage flowing into the sedimentation basin 1 increases or decreases, the amount of sewage flowing into the anaerobic tank 4 increases or decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases or decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to the embodiment 163, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to the embodiment 163, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the effluent is determined in accordance with a difference from a predetermined target value of the concentration of phosphoric acid in the discharged water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the apparatus and the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained. In addition, according to this embodiment 163, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 163, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0743] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 164. Embodiment 164. FIG. 164 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 164 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing in from outside the system. As a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank so as to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment. It constitutes the device. In FIG. 164, reference numeral 200 denotes the controller 22.
The arithmetic unit outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 127 and the output value of the controller 127. The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b, the controller 127 via the signal line 127a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 163, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 164, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 164, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the effluent is determined in accordance with a difference from a predetermined target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the water treatment apparatus and the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Even if the flow rate or concentration of the oxidizing agent fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 164, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. further,
According to this embodiment 164, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained.

[0747] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 165. Embodiment 165. FIG. 165 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 165 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. As a means to detect the amount of phosphorus that flows in, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank is provided. The apparatus is configured to regulate the amount of inflow sewage. In FIG. 165, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 23 and the output value of the controller 127. It is. The arithmetic unit 200 is connected to the signal line 23 via the signal line 23b.
a, the controller 127 via a signal line 127a and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 5 and 163, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 165, the nitrate nitrogen concentration of the sewage and the nitrate concentration of the effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 165, the concentration of phosphoric acid in sewage flowing into biological reaction tank 2 is measured, and the concentration of phosphoric acid in effluent is determined in accordance with a difference from a predetermined target value of phosphoric acid in effluent. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the water treatment device and the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Even if the flow rate or concentration of the oxidizing agent fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 165, the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to the embodiment 165, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 166. FIG. 166 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 166 of the present invention. The present embodiment is provided with a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of phosphorus flowing in from outside the system. The system is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the reaction tank. It is composed. In FIG. 166, each component is shown in FIGS.
3 are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 166, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated data of the nitrate nitrogen concentration. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 166, the concentration of phosphoric acid in sewage flowing into biological reaction tank 2 is measured, and the concentration of phosphoric acid in effluent is determined in accordance with a difference from a predetermined target value of phosphoric acid in effluent. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the water treatment device and the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Even if the flow rate or concentration of the phenol is fluctuated, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. According to this embodiment 166, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to this embodiment 166, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0755] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 167. FIG. 167 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 167 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and a device that adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. It is what constituted. In FIG. 167, reference numeral 200 denotes the controller 24.
The arithmetic unit outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 127 and the output value of the controller 127. The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b, the controller 127 via the signal line 127a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 9 and 163, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 167, the nitrate nitrogen concentration of the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 167, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the discharged water is determined in accordance with the difference from the predetermined target value of the concentration of phosphoric acid in the discharged water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the water treatment device and the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Even if the flow rate or concentration of the oxidizing agent fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 167, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. In addition, this embodiment 16
According to 7, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment device, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 168. FIG. 168 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 168 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and a device that adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. It is what constituted. In FIG. 168, reference numeral 200 denotes the controller 25.
The arithmetic unit outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 127 and the output value of the controller 127. The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b, the controller 127 via the signal line 127a, and the inflow pump 15 via the signal line 200a. Other components are shown in FIG.
163 is the same as or equivalent to that shown by the same reference numeral in FIG. 163, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 168, the nitrate nitrogen concentration of the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is adjusted according to the measured value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 168, the concentration of phosphoric acid in sewage flowing into biological reaction tank 2 is measured, and the concentration of phosphoric acid in effluent is determined in accordance with a difference from a predetermined target value of phosphoric acid in effluent. The anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the water treatment device and the amount of sewage flowing into the anaerobic tank 4.
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 168, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Furthermore, according to this embodiment 168, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 169. Embodiment 169. FIG. 169 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 169 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for controlling the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The apparatus is configured as described above. In FIG. 169, 200
Is an arithmetic unit that outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 127. The arithmetic unit 200 is connected to the signal line 26a via the signal line 26b, the controller 127 via the signal line 127a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 13 and 163, and thus detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to the embodiment 169, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 169, the concentration of phosphoric acid in sewage flowing into biological reaction tank 2 is measured, and the concentration of phosphoric acid in effluent is determined in accordance with a difference from a predetermined target value of phosphoric acid in effluent. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the water treatment device and the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Even if the flow rate or concentration of the phenol is fluctuated, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. According to this embodiment 169, the amount of sewage flowing into the biological water treatment apparatus is adjusted, and the oxygen-free tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to the embodiment 169, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing from the outside of the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 170. Embodiment 170 FIG. 170 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 170 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for controlling the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The apparatus is configured as described above. In FIG. 170, 200
Is a computing unit that outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 127. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the controller 127 via the signal line 127a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 15 and 163, and thus detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to Embodiment 170, the total nitrogen concentration of sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the seventeenth embodiment
According to 0, the concentration of the phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the effluent flowing into the biological water treatment apparatus is determined in accordance with a difference from a predetermined target value of the concentration of the phosphoric acid in the discharged water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage and flowing into the anaerobic tank 4 and the amount of phosphorus discharged is adjusted, so the flow rate and concentration of sewage flowing from outside the system fluctuate. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to the embodiment 170, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Further, the first embodiment
According to 70, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, so that the amount of organic matter supplied to the oxygen-free tank 5 is not affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

[0771] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the concentration. Is also good.

Embodiment 171. FIG. 171 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 171 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing in from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for controlling the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The apparatus is configured as described above. In FIG. 171, reference numeral 15 denotes an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

[0773] Reference numeral 141 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2.
The arithmetic unit 2 outputs a signal for setting the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the value measured by the phosphoric acid phosphorus concentration meter 141.
The controller 200 outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 21 and the output value of the controller 128. Computing unit. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. The controller 128 includes a signal line 141.
It is connected to a phosphoric acid phosphorus concentration meter 141 via a. The arithmetic unit 200 is connected to the signal line 21 via the signal line 21b.
a, the controller 128 via a signal line 128a and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141.
Is measured by the controller 1 via the signal line 141a.
28. The controller 128 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 by bypass in accordance with the measured value of the phosphoric acid phosphorus concentration, for example, according to a formula similar to the formula (15.1). The output of the controller 128 is the signal line 12
8a is transmitted to the arithmetic unit 200.

[0775] The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the output value of the controller 21 and the output value of the controller 128, for example, according to the equation (28.1). And output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment device increases and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the oxygen-free tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the biological water treatment device decreases and the amount of sewage bypassed into the anoxic tank 5 decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
Depending on how large the measured value of the phosphoric acid phosphorus concentration is, the amount of sewage flowing into the biological water treatment apparatus increases and decreases, and the amount of sewage flowing into the sedimentation basin 1 increases and decreases.
The amount of sewage flowing into the tank increases and decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases and decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to this embodiment 171, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 171, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the anaerobic tank 4.
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained. Also, according to this embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the oxygen-free tank 5 is adjusted.
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Furthermore, according to this embodiment 171, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 172. FIG. 172 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 172 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing in from outside the system. As a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank so as to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment equipment. It constitutes the device. In FIG. 172, reference numeral 200 denotes the controller 22.
The arithmetic unit outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 128 and the output value of the controller 128. The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b, the controller 128 via the signal line 128a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 3 and 171, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 3
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (2.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 172, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 172, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to thereby adjust the anaerobic tank. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be produced is obtained.
According to this embodiment 172, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without influencing the bypass is obtained. Further, according to the embodiment 172, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0782] In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the total phosphorus concentration is measured. The device may be configured.

Embodiment 173. Embodiment 173. FIG. 173 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 173 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. As a means to detect the amount of phosphorus that flows in, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank is provided. The apparatus is configured to regulate the amount of inflow sewage. In FIG. 173, an arithmetic unit 200 outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 23 and the output value of the controller 128. It is. The arithmetic unit 200 is connected to the signal line 23 via the signal line 23b.
a, the controller 128 via a signal line 128a and the inflow pump 15 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 5 and 171, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 5
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 173, the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 173, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with the measured value to thereby adjust the anaerobic tank. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 173, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Furthermore, according to this embodiment 173, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0786] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 174. Embodiment 174. FIG. 174 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 174 of the present invention. The present embodiment is provided with a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of phosphorus flowing in from outside the system. The system is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the reaction tank. It is composed. In FIG. 174, each component is shown in FIGS.
1 is the same as or equivalent to the one denoted by the same reference numeral, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 7
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is, a signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 174, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated data of the nitrate nitrogen concentration. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this Embodiment 174, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the anaerobic tank. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus to be produced is obtained. Further, according to this embodiment 174, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 174, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

[0790] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank. May be configured.

Embodiment 175. FIG. 175 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 175 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and a device that adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. It is what constituted. In FIG. 175, reference numeral 200 denotes the controller 24.
The arithmetic unit outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 128 and the output value of the controller 128. The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b, the controller 128 via the signal line 128a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those shown by the same reference numerals in FIGS. 9 and 171, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 9
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 175, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage that flows into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 175, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted in accordance with the measured value to thereby adjust the anaerobic tank. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 175, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to the embodiment 175, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 176. FIG. 176 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 176 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and a device that adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. It is what constituted. In FIG. 176, reference numeral 200 denotes the controller 25.
The arithmetic unit outputs to the inflow pump 15 a signal for setting the amount of sewage flowing into the biological water treatment apparatus to a predetermined value in accordance with the output value of the controller 128 and the output value of the controller 128. Arithmetic unit 200 is connected to signal line 25a via signal line 25b, controller 128 via signal line 128a, and inflow pump 15 via signal line 200a. Other components are shown in FIG.
171 is the same as or equivalent to that shown by the same reference numeral in FIG. 171, and a detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 1, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (5.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 176, the concentration of the nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 176, the concentration of phosphoric acid and phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. Further, according to this embodiment 176, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, the first embodiment
According to 76, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus, so that the amount of organic matter supplied to the anoxic tank 5 is not affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 177. FIG. 177 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 177 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for controlling the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The apparatus is configured as described above. In FIG. 177, 200
Is an arithmetic unit that outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 26 and the output value of the controller 128. The arithmetic unit 200 is connected to the signal line 26a via the signal line 26b, the controller 128 via the signal line 128a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 13 and 171, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 3, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 177, the total nitrogen concentration of the sewage flowing into biological reaction tank 2 is measured, and according to the difference between the predetermined target value of the total nitrogen concentration of the discharged water and By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 177, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to thereby adjust the anaerobic tank. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 177, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, the seventeenth embodiment
According to 7, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment device, the amount of organic matter supplied to the anoxic tank 5 is not affected, The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.

In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the concentration of nitrate nitrogen in the sewage flowing into the biological reaction tank 2. However, the amount of nitrogen in ammonia is measured. The device may be configured at the same time. Also,
In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. Is also good.

Embodiment 178. FIG. 178 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 178 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the sewage flowing into the biological reaction tank as a means for controlling the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment device. The apparatus is configured as described above. In FIG. 178, 200
Is an arithmetic unit that outputs to the inflow pump 15 a signal that sets the amount of sewage flowing into the biological water treatment apparatus to a predetermined value according to the output value of the controller 27 and the output value of the controller 128. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the controller 128 via the signal line 128a, and the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 15 and 171, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 5, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (7.1) is output to the inflow-anoxic-tank bypass inflow pump 12. Also, as in the case of the embodiment 171, the amount of sewage flowing into the biological water treatment apparatus is adjusted. That is,
A signal having a value obtained according to the equation (24.1) is output to the inflow pump 15.

As described above, according to this embodiment 178, the total nitrogen concentration of sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the seventeenth embodiment
According to No. 8, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological water treatment apparatus is adjusted according to the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be ensured. The effect that can be reduced is obtained. In addition, according to this embodiment 178, since the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect of being able to adjust the amount of sewage flowing into the anoxic tank 5 without being affected is obtained. Further, according to this embodiment 178, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the biological water treatment apparatus. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without any influence is obtained.

In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the concentration of nitrate nitrogen in the sewage flowing into the biological reaction tank 2. However, the amount of nitrogen in ammonia is measured. The device may be configured as follows. Also,
In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. Is also good.

Embodiment 179. FIG. 179 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 179 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. The system is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the mixed solution in the tank, and is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 179, reference numeral 14 denotes a first settling tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the first settling tank 1.

[0808] Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4.
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
Reference numeral 121 denotes the measured value of the phosphoric acid phosphorus concentration meter 142 and the setting device 1
A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the difference from the target value set to 31 to the arithmetic unit 200. The controller 200 outputs the output value of the controller 21 and the controller 121.
And outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the first settling tank 1. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The controller 121 is connected to the phosphoric acid phosphorus concentration meter 142 via a signal line 142a and to the setting device 131 via a signal line 131a. Arithmetic unit 200
Are connected to the signal line 21a via the signal line 21b and the signal line 12
The controller 121 is connected via 1a and the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142.
Is measured by the controller 1 via the signal line 142a.
21. Further, the target value set in the setting device 131 is transmitted to the controller 121 via the signal line 131a. The controller 121 calculates the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to a formula similar to the formula (8.1). Is output. The output of the adjuster 121 is transmitted to the arithmetic unit 200 via the signal line 121a.

The arithmetic unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 121. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the first settling tank inflow pump 14 via the signal line 200a.

[0811] From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases, and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the anaerobic tank 4 increases due to the increase in the amount of sewage flowing into the sedimentation basin 1, and the amount of organic matter entering the anaerobic tank 4 increases. The supply increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The organic matter supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to this embodiment 179, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 179, the phosphoric acid phosphorus concentration of the sewage in the mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to a difference from a predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant, even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted and the anaerobic tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Furthermore, according to this embodiment 179, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. In addition, according to this embodiment 179, part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 180. FIG. 180 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 180 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the mixed solution, and is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 180, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 121. It is a vessel. The arithmetic unit 200 includes a signal line 22a via a signal line 22b and a controller 121 via a signal line 121a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS.
Detailed description is omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 180, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic matter supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the amount or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 180, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to the embodiment 180, since the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to the embodiment 180, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to the embodiment 180, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component in the bypass flow to the anoxic tank 5 is small, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 181. FIG. 181 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 181 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in the mixed solution in the anaerobic tank as a means of detecting the concentration of sewage in the anaerobic tank, and regulates the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank This is the configuration of the device. In FIG. 181, reference numeral 200 denotes a controller 23.
Is a computing unit that outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank to a predetermined value in accordance with the output value of the controller 121 and the output value of the controller 121. The arithmetic unit 200 is
The signal line 23a and the signal line 121a are connected via the signal line 23b.
And the inflow pump 15 via the signal line 200a. Other components are shown in FIG.
179 is the same as or equivalent to that shown by the same reference numeral in FIG. 179, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 181, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the discharge water in the mixed solution in the oxygen-free tank 5 are measured, and the difference between the two is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 181, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 181, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 181, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. In addition, according to this embodiment 181, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 182. FIG. 182 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 182 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the sewage, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 182, each component is the same as or equivalent to the component shown in FIG.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

[0821] As described above, according to this embodiment 182, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated data of the nitrate nitrogen concentration. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 182, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus was kept constant, so that the flow rate and concentration of the sewage flowing from outside the system fluctuated. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to the embodiment 182, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 182, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.
In addition, according to this embodiment 182, a part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 183. Embodiment 183. FIG. 183 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 183 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the liquid, and the device is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. . FIG. 183
, 200 is the output value of the controller 24 and the controller 121
And outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the first settling tank 1. The arithmetic unit 200 includes a signal line 24a via a signal line 24b and a controller 121 via a signal line 121a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to Other components are shown in FIG. 10 and FIG.
Since they are the same as or equivalent to those denoted by the same reference numerals at 79, detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0824] As described above, according to this embodiment 183, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 183, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged was kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. According to this embodiment 183, the amount of sewage flowing into sedimentation basin 1 is adjusted and the amount of sewage flowing into bypass tank 5 is adjusted, so that the amount of organic matter supplied to anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 183, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. In addition, according to the embodiment 183, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS flow is small in the bypass flow to the anoxic tank 5, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 184. Embodiment 184. FIG. 184 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 184 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the liquid, and the device is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. . FIG.
, 200 is the output value of the controller 25 and the controller 121
Is an arithmetic unit for adjusting the output to the first settling tank inflow pump 14 in accordance with the output value of the first settling tank. The arithmetic unit 200 is connected to the signal line 25
b, a signal line 25a, a controller 121 via a signal line 121a, and a first settling basin inflow pump 14 via a signal line 200a. Other components are shown in Figure 1.
2 and FIG. 179 are the same as or equivalent to those denoted by the same reference numerals, and therefore, detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 184, the concentration of nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 184, the concentration of phosphoric acid in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus was kept constant, so that the flow rate and concentration of the sewage flowing from outside the system fluctuated. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 184, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time as the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 184, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first.
The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5 is obtained. Also, according to this embodiment 184,
Since a part of the sewage flowing out of the first sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and the load of the initial sedimentation-anoxic tank bypass inflow pump 11 is reduced. Is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 185. FIG. 185 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 185 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. The system was equipped with a phosphoric acid phosphorus concentration meter to measure the concentration of phosphoric acid in the mixed solution in the sewage, and the amount of sewage flowing into the anoxic tank by-pass and the amount flowing into the first sedimentation basin were adjusted. Things. In FIG. 185, reference numeral 200 designates a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value in accordance with the output value of the controller 26 and the output value of the controller 121.
4 is an arithmetic unit for outputting the result to The arithmetic unit 200 is connected to the signal line 2
6b, a signal line 26a, a controller 121 via a signal line 121a, and a first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 179, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0832] As described above, according to this embodiment 185, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 185, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 according to a difference from a predetermined target value. And the amount of organic matter supplied to the anaerobic tank 4 was adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus was kept constant, so that the flow rate and concentration of the sewage flowing from outside the system fluctuated. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Also, in this embodiment 185
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. In addition, this embodiment 18
According to 5, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. In addition, according to this embodiment 185, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0832] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 186. FIG. 186 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 186 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. The system was equipped with a phosphoric acid phosphorus concentration meter to measure the concentration of phosphoric acid in the mixed solution in the sewage, and the amount of sewage flowing into the anoxic tank by-pass and the amount flowing into the first sedimentation basin were adjusted. Things. In FIG. 186, reference numeral 200 designates a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 27 and the output value of the controller 121.
4 is an arithmetic unit for outputting the result to The arithmetic unit 200 is connected to the signal line 2
7b, the controller 27 is connected via a signal line 121a, the controller 121 via a signal line 121a, and the initial settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 179, and thus detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 186, the total nitrogen concentration of the sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . In addition, this embodiment 18
According to 6, the phosphoric acid concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to a difference from a predetermined target value to adjust the sewage. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 186, the amount of sewage flowing into the first sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 186, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Also, in this embodiment 186
According to the method, a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, so that the SS component in the bypass flow to the anaerobic tank 5 is small, and The effect of reducing the load on the pump 11 is obtained.

[0837] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 187. Embodiment 187. FIG. 187 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 187 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. It has an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed liquid inside the device, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 187, reference numeral 14 denotes a first sedimentation tank inflow pump provided in a pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

Also, reference numeral 152 denotes an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, reference numeral 132 denotes a setter for setting a target value of the oxidation-reduction potential, and reference numeral 122 denotes an oxidation-reduction potentiometer 152 A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the difference between the measured value of and the target value set in the setter 132 to the arithmetic unit 200;
Is a computing unit that outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 21 and the output value of the controller 122. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The controller 122 is connected to the oxidation-reduction potentiometer 152 via a signal line 152a and to the setting device 132 via a signal line 132a. The arithmetic unit 200 includes a signal line 21a via a signal line 21b and a controller 122 via a signal line 122a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured by an oxidation-reduction potentiometer 152, and the measured value is transmitted to the controller 122 via a signal line 152a. The target value set in the setting device 132 is
The signal is transmitted to the controller 122 via the signal line 132a. The controller 122 calculates the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the oxidation-reduction potential and a predetermined target value, for example, with a value obtained according to a formula similar to the formula (9.1). Output a signal. The output of the controller 122 is transmitted to the arithmetic unit 200 via the signal line 122a.

The arithmetic unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 122. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the first settling tank inflow pump 14 via the signal line 200a.

As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases, and the amount of sewage flowing into the anoxic tank 5 by the bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the measured value of the oxidation-reduction potential is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. The amount increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the oxidation-reduction potential is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the embodiment 187, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to the embodiment 187, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to a difference from a predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of discharged phosphorus is kept constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 187, since the amount of sewage flowing into first sedimentation basin 1 and the amount of sewage bypassed into anoxic tank 5 are adjusted, the amount of organic matter supplied to anaerobic tank 4 is affected. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Further, according to this embodiment 187, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. According to this embodiment 187, part of the sewage flowing out of sedimentation basin 1 initially flows into oxygen-free tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 188. FIG. 188 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 188 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. The apparatus is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the mixed liquid, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin 1. . Reference numeral 200 denotes an arithmetic unit which outputs a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 22 and the output value of the controller 121 to the first settling tank inflow pump 14. Arithmetic unit 20
0 is the signal line 22a via the signal line 22b and the signal line 1
A regulator 122 is connected via 22a and a first settling tank inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 187, and thus detailed description thereof is omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 188, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 188, the oxidation-reduction potential of the sewage in the mixed solution in anaerobic tank 4 is measured, and the amount of sewage flowing into first sedimentation basin 1 is determined according to a difference from a predetermined target value. Adjustable anaerobic tank 4
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 188, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time as the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 188, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. In addition, according to this embodiment 188, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 189. Embodiment 189. FIG. 189 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 189 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, A redox potentiometer that measures the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank is provided as a means for detecting the sewage in the mixed solution in the anaerobic tank. The apparatus is configured as follows. In FIG. 189, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 23 and the output value of the controller 122. It is a vessel. Arithmetic unit 200 is connected to signal line 23a via signal line 23b, controller 122 via signal line 122a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 187, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

[0849] As described above, according to this embodiment 189, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixed solution in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 189, the oxidation-reduction potential of the sewage in the mixed solution in anaerobic tank 4 is measured, and the amount of sewage flowing into first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 189, since the amount of sewage flowing into sedimentation basin 1 is adjusted at the same time as the amount of sewage flowing into bypass tank 5 is adjusted, the amount of organic matter supplied to anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 189, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. In addition, according to this embodiment 189, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 190. Embodiment 190 FIG. 190 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 190 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in the system, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 190, each component is the same as or equivalent to that shown in FIG. 8 and FIG.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 187, the amount of sewage flowing into the first settling basin is adjusted. That is,
A signal having a value obtained according to the same expression as the expression (24.1) is output to the first settling tank inflow pump 14.

As described above, according to this embodiment 190, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to Embodiment 190, the oxidation-reduction potential of the sewage in the mixed solution in anaerobic tank 4 is measured, and the amount of sewage flowing into first sedimentation basin 1 is determined according to the difference from a predetermined target value. The anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4.
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates can be obtained. . In addition, according to this embodiment 190, the amount of sewage flowing into sedimentation basin 1 is adjusted, and the amount of sewage flowing into bypass tank 5 is adjusted. Anoxic tank 5 without giving
The effect of being able to adjust the amount of sewage flowing into the bypass is obtained. Furthermore, according to this embodiment 190, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Also,
According to this embodiment 190, part of the sewage flowing out of sedimentation basin 1 first flows into oxygen-free tank 5 by bypass.
In the bypass flow to the anoxic tank 5, the SS component is small, and the effect of reducing the load on the initial settling-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 191. FIG. 191 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 191 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of discharged phosphorus, mixing in the anaerobic tank. The apparatus is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a liquid, and is configured to adjust the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. In FIG. 191, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 24 and the output value of the controller 122. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b, the controller 122 via the signal line 122a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 10 and 187, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 191, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 191, the oxidation-reduction potential of the sewage in the mixture in the anaerobic tank 4 is measured, and the first settling tank 1 is set in accordance with a difference from a predetermined target value.
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. According to this embodiment 191, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 191, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 191, a part of the sewage flowing out of the first sedimentation basin 1 is supplied to the anaerobic tank 5
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 192. Embodiment 192. FIG. 192 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 192 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of discharged phosphorus, mixing in the anaerobic tank. The apparatus is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a liquid, and is configured to adjust the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. In FIG. 192, 200 adjusts the output to the first sedimentation basin inflow pump 14 based on a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 25 and the output value of the controller 122. It is a computing unit that performs The arithmetic unit 200 includes a signal line 25a via a signal line 25b and a controller 122 via a signal line 122a.
Is connected to the inflow pump 15 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 12 and 187, and detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0859] As described above, according to this embodiment 192, the nitrate nitrogen concentration of the discharge water is measured, and the amount of sewage that flows into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 192, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling tank 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is kept constant. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, this embodiment 192
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. Further, the nineteenth embodiment
According to 2, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. In addition, according to this embodiment 192, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 193. FIG. 193 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 193 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. It has an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed liquid inside the device, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. FIG.
At 93, 200 is the output value of the controller 26 and the controller 1
The arithmetic unit outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of 22. The arithmetic unit 200 includes the signal line 26a via the signal line 26b and the controller 1 via the signal line 122a.
22 and the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 187, and detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 193, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 193, the oxidation-reduction potential of the sewage in the mixed solution in anaerobic tank 4 is measured, and the amount of sewage flowing into first settling tank 1 is determined according to the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus is kept constant. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 193, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 193, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first.
Anaerobic tank 4 without affecting the amount of organic matter supplied to
The effect of being able to adjust the amount of sewage flowing into the tank is obtained. Further, according to this embodiment 193, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0864] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 194. Embodiment 194. FIG. 194 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 194 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. It has an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed liquid inside the device, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. FIG.
At 94, 200 is the output value of the controller 27 and the controller 1
This is a computing unit that adjusts the output to the first settling tank inflow pump 14 according to the output value of 22. Arithmetic unit 200 is connected to signal line 27a via signal line 27b, controller 122 via signal line 122a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 187, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 194, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the nineteenth embodiment
According to 4, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of discharged phosphorus is kept constant. The effect of reliably reducing the amount of phosphorus is obtained. In addition, according to this embodiment 194, the amount of sewage flowing into the sedimentation basin 1 is adjusted, and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 194, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 194, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0868] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 195. Embodiment 195. FIG. 195 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 195 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution inside, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. It was done. FIG.
In 5, reference numeral 14 denotes a first settling tank inflow pump provided on the pipe a for controlling the flow rate of sewage flowing into the first settling tank 1.

[0870] Reference numeral 162 denotes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4.
Reference numeral 33 denotes a setter for setting a target value of the phosphorus content, and 123 denotes the amount of sewage flowing into the anaerobic tank 4 according to the difference between the measured value of the phosphorus content measuring device 162 and the target value set in the setter 133. A controller for outputting a signal having a predetermined value to the arithmetic unit 200;
Reference numeral 200 denotes an arithmetic unit which outputs a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 21 and the output value of the controller 123 to the first settling tank inflow pump 14. The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The controller 123 includes a phosphorus content measuring device 162 via a signal line 162a and a setting device 1 via a signal line 133a.
33. The arithmetic unit 200 is connected to the signal line 21b.
Is connected to the controller 123 via the signal line 123a, and to the first settling tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured by a phosphorus content measuring device 162, and the measured value is sent to the controller 12 via a signal line 162a.
It is conveyed to 3. Further, the target value of the phosphorus content set in the setting device 133 is adjusted by the controller 12 via the signal line 133a.
It is conveyed to 3. The controller 123 adjusts the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphorus content and a predetermined target value, for example, according to a formula similar to the formula (10.1). Output a signal. The output of the controller 123 is transmitted to the arithmetic unit 200 via the signal line 123a.

The arithmetic unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 123. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the first settling tank inflow pump 14 via the signal line 200a.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases, and the amount of sewage flowing into the anoxic tank 5 by the bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the measured value of the phosphorus content is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. The amount increases.
As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphorus content is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to the embodiment 195, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 195, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is determined according to the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the discharge amount of phosphorus is kept constant. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 195, the amount of sewage flowing into the first sedimentation basin 1 is adjusted and the anaerobic tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to this embodiment 195, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. Further, according to this embodiment 195, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 196. FIG. 196 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 196 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. A device equipped with a phosphorus content measuring device for measuring the phosphorus content of phosphorus-accumulating bacteria in a mixed solution, and configured to control the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin It is. In FIG. 196, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 123. It is a vessel. The arithmetic unit 200 includes a signal line 22a via a signal line 22b and a controller 123 via a signal line 123a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to Other components are shown in FIGS.
5 are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 196, the oxidation-reduction potential of the sewage in the mixture in the oxygen-free tank 5 is measured, and the oxygen-reduction potential of the mixed liquid in the oxygen-free tank 5 is determined according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 196, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. According to this embodiment 196, the amount of sewage flowing into the first settling basin 1 is adjusted and the anaerobic tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to this embodiment 196, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. Further, according to this embodiment 196, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 197. Embodiment 197. FIG. 197 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 197 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, Equipped with a phosphorus content measuring device that measures the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank, and measures the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. The device is configured to adjust. In FIG. 197, reference numeral 200 denotes the first settling tank 1 according to the output value of the controller 23 and the output value of the controller 123.
This is a computing unit that outputs a signal for setting the amount of sewage flowing into the tank to a predetermined value to the settling tank inflow pump 14 first. The arithmetic unit 200 is
The signal line 23a and the signal line 123a are connected via the signal line 23b.
Is connected to the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 195, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 197, the concentration of nitrate nitrogen in sewage and the concentration of nitrate in effluent in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 197, the phosphorus content of the phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, the discharge amount of phosphorus is kept constant.
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 197, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the influence on the amount of organic matter supplied to the anaerobic tank 4 is reduced. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 197, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 197, since a part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass, the SS component is small in the bypass flow to oxygen free tank 5, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 198. FIG. 198 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 198 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. It is equipped with a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the water, and the device is configured to regulate the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. . In FIG. 198,
Each component is the same as or equivalent to the component shown in FIG. 8 and FIG.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

As described above, according to this embodiment 198, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the stored nitrate nitrogen concentration data is used. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 198, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 198, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time as the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 198, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.
Further, according to this embodiment 198, since a part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass, the SS component in the bypass flow to oxygen free tank 5 is small, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 199. FIG. 199 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 199 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. It is equipped with a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, and the device is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 199, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 24 and the output value of the controller 123. It is a vessel. The arithmetic unit 200 includes a signal line 24a via a signal line 24b and a controller 123 via a signal line 123a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to Other components are shown in FIG. 10 and FIG.
Since they are the same as or equivalent to those denoted by the same reference numerals at 95, detailed description thereof is omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 199, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to the embodiment 199, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant, so the flow rate and concentration of sewage flowing from outside the system fluctuate. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 199, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Furthermore, according to this embodiment 199, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. Further, according to this embodiment 199, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0887] In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent, but the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 200 FIG. 200 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 200 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. It is equipped with a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, and the device is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 200, a computing unit 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank to a predetermined value in accordance with the output value of the controller 25 and the output value of the controller 123. It is. The arithmetic unit 200 includes a signal line 25a via a signal line 25b, a controller 123 via a signal line 123a,
The first settling basin inflow pump 14 is connected via a signal line 200a. The other components are shown in FIGS.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 200, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 200, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to a difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 200, since the amount of sewage flowing into first settling basin 1 and the amount of sewage bypassed into anoxic tank 5 are adjusted, the amount of organic matter supplied to anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 200, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first.
The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5 is obtained. Also, according to this embodiment 200,
Since a part of the sewage flowing out of the first sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and the load of the initial sedimentation-anoxic tank bypass inflow pump 11 is reduced. Is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 201 FIG. 201 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 201 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution inside, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. It was done. In FIG. 201, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 26 and the output value of the controller 123.
4 is an arithmetic unit for outputting the result to The arithmetic unit 200 is connected to the signal line 2
6b, a signal line 26a, a controller 123 via a signal line 123a, and a first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 195, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 201, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined in accordance with a predetermined difference from the target value of the total nitrogen concentration of the discharged water. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass.
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 201, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to the difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. In this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, this Embodiment 201
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. Further, the embodiment 20
According to 1, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. Further, according to the embodiment 201, since a part of the sewage flowing out of the sedimentation basin 1 first flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0895] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured.

[0896] Embodiment 202. FIG. 202 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 202 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a phosphorus content measuring device to measure the phosphorus content of the phosphorus accumulating bacteria in the mixed solution inside, and configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. It was done. In FIG. 202, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value in accordance with the output value of the controller 27 and the output value of the controller 123.
4 is an arithmetic unit for outputting the result to The arithmetic unit 200 is connected to the signal line 2
The signal line 27a is connected via a signal line 7b, the controller 123 via a signal line 123a, and the first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 195, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0898] As described above, according to this embodiment 202, the concentration of total nitrogen flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Thus, the amount of organic matter supplied to the anoxic tank 5 is adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 202, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the phosphorus content of the mixture into the first sedimentation basin 1 is determined according to the difference from a predetermined target value. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water and the amount of sewage flowing into the anaerobic tank 4, and the discharge amount of phosphorus is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to the embodiment 202, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Further, according to the embodiment 202, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. In addition, according to this embodiment 202, a part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0899] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. However, the amount of nitrogen in ammonia is measured. An apparatus may be configured.

Embodiment 203 FIG. 203 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 203 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. Equipped with a device that calculates the difference between the concentration of phosphoric acid in the mixed solution in the tank and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank. The device is configured to regulate the amount of water. In FIG. 203, reference numeral 14 denotes a first sedimentation basin inflow pump 14 provided on a pipe a for adjusting the flow rate of sewage flowing into the first sedimentation basin 1.

[0991] Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage in the mixed solution in the anaerobic tank 4.
141 is a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2; An arithmetic unit 134 for calculating the difference between the concentration of phosphoric acid and the concentration of phosphoric acid in the mixture in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank Is a setting unit for setting the arithmetic unit 18
A controller that outputs a signal for setting the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with the difference between the calculated value of 1 and the target value set in the setter 134 to the calculator 200. First settling basin 1 according to the output value of
This is a computing unit that outputs a signal for setting the amount of sewage flowing into the tank to a predetermined value to the settling tank inflow pump 14 first. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4, and the phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The arithmetic unit 181 is connected to the phosphoric acid concentration meter 142 via a signal line 142a and to the phosphoric acid concentration meter 141 via a signal line 141a. The adjuster 124 includes an arithmetic unit 181 via a signal line 181a and a setting unit 134 via a signal line 134a.
Is connected to The arithmetic unit 200 includes a signal line 21a via a signal line 21b and a controller 1 via a signal line 124a.
24 and the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142.
And the measured value is calculated by the arithmetic unit 1 via the signal line 142a.
It is conveyed to 81. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to an arithmetic unit 181 via a signal line 141a. The calculator 181 calculates the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 according to, for example, equation (11.1).

[0913] The output of the arithmetic unit 181 is transmitted to the adjuster 124 via the signal line 181a. The setting device 134
Is transmitted to the controller 124 via the signal line 134a. The controller 124 calculates a difference between the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 and a predetermined target value. In accordance with the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained according to, for example, a formula similar to the formula (11.2). The output of the adjuster 124 is transmitted to the calculator 200 via the signal line 124a.

The arithmetic unit 200 calculates the amount of sewage flowing into the biological water treatment apparatus according to the same equation as the equation (24.1) according to the output value of the controller 21 and the output value of the controller 124. A signal having the obtained value is output. The output of the arithmetic unit 200 is supplied to the first sedimentation basin inflow pump 14 via a signal line 200a.
Conveyed to.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases, and the amount of sewage flowing into the anoxic tank 5 by the bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the calculated value of the difference between the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is smaller than the target value, the sedimentation tank 1 is first placed. The amount of inflow sewage into the anaerobic tank 4 increases due to the increase in
The amount of organic matter supplied to the anaerobic tank 4 increases. As a result, the phosphorus discharge increases, and the phosphorus removal amount increases. Conversely, anaerobic tank 4
If the calculated value of the difference between the phosphoric acid phosphorus concentration of the mixed solution in the inside and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first decreases. As a result, the amount of sewage flowing into the anaerobic tank 4 decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, the phosphorus discharge is reduced, and the phosphorus removal amount is reduced.

As described above, according to the embodiment 203, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 203, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the calculated value of the difference between them is calculated. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with a difference from a predetermined target value, thereby discharging phosphorus. Since the amount is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates can be obtained. Also, the second embodiment
According to No. 03, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect of being able to adjust the amount of sewage flowing into the tank 5 by bypass is obtained. Furthermore, the second embodiment
According to No. 03, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first, so that the amount of organic matter supplied to the anoxic tank 5 is not affected.
The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 203, since a part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass, SS flows during the bypass flow to oxygen free tank 5.
Low in component, primary sedimentation-anoxic tank bypass inflow pump 11
Thus, the effect of reducing the load on the device can be obtained.

Embodiment 204 [0908] FIG. 204 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 204 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. A device is provided for calculating the difference between the concentration of phosphoric acid in the mixture and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2. The apparatus is configured so as to adjust. In FIG. 204, an operation 200 outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 124. It is a vessel. The arithmetic unit 200 includes a signal line 22a via a signal line 22b, a controller 124 via a signal line 124a, and a signal line 200a
Is connected to the first settling tank inflow pump 14.
The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 203, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 204, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential of the mixed liquid in the oxygen-free tank 5 is determined according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 204, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value, Since the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, this embodiment 20
According to the method 4, the amount of sewage flowing into the first sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. The effect of adjusting the amount of sewage flowing into the tank 5 by bypass is obtained. Further, the embodiment 20
According to 4, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1. The effect of being able to adjust the amount of sewage flowing into 4 is obtained. In addition, according to this embodiment 204, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 205 FIG. 205 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 205 of the present invention. This embodiment includes a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. Equipped with a device for calculating the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank as means for detecting
The apparatus is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin.
In FIG. 205, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 23 and the output value of the controller 124. It is a vessel. The arithmetic unit 200 is connected to the signal line 23b.
And a controller 124 via a signal line 124a and a first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 203, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 205, the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 205, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 and adjusting the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the value and the predetermined target value, Since the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Also, in this Embodiment 205
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. Further, the embodiment 20
According to 5, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. Further, according to this embodiment 205, since a part of the sewage flowing out of sedimentation basin 1 flows into oxygen-free tank 5 by bypass, SS component is small in the bypass flow to oxygen-free tank 5, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0913] Embodiment 206 FIG. 206 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 206 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. Equipped with a device to calculate the difference between the concentration of phosphoric acid in the sewage and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank. The device is configured to adjust. In FIG. 206, each component is the same as or equivalent to that shown in FIG. 8 and FIG.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

As described above, according to the embodiment 206, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated data of the nitrate nitrogen concentration. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 206, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. First settling basin 1 according to the difference between the value and the predetermined target value
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to the embodiment 206, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 206, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anoxic tank 5 is affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 206, a part of the sewage flowing out of sedimentation basin 1 is first supplied to anoxic tank 5.
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 207. FIG. 207 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 207 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. Equipped with a device to calculate the difference between the concentration of phosphoric acid in the sewage in the liquid and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank. The apparatus is configured so as to adjust. In FIG. 207, 20
Numeral 0 denotes a calculator for outputting a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 24 and the output value of the controller 124 to the first settling tank inflow pump 14.
The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b.
And a controller 124 via a signal line 124a, and a signal line 2
The first settling basin inflow pump 14 is connected to the first settling basin inflow pump 14 via the first settling tank. Other components are the same as or equivalent to those shown with the same reference numerals in FIGS. 10 and 203.
Detailed description is omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 207, the nitrate nitrogen concentration of the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 207, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value, Since the phosphorus discharge rate is kept constant,
Even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. In addition, according to this embodiment 207, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Furthermore, according to this embodiment 207, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 207, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 208 [0920] FIG. 208 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 208 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. Equipped with a device to calculate the difference between the concentration of phosphoric acid in the sewage in the liquid and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank. The apparatus is configured so as to adjust. In FIG. 208, 20
Numeral 0 denotes a calculator which outputs a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 25 and the output value of the controller 124 to the first settling tank inflow pump 14.
The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b.
And a controller 124 via a signal line 124a, and a signal line 2
The first settling basin inflow pump 14 is connected to the first settling basin inflow pump 14 via the first settling tank. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS.
Detailed description is omitted.

[0921] Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 208, the concentration of nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to the embodiment 208, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured.
The organic matter to be supplied to the anaerobic tank 4 by adjusting the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the calculated value of the difference and a predetermined target value. Since the amount is adjusted and the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to the embodiment 208, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to the embodiment 208, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first, so that the amount of organic matter supplied to the oxygen-free tank 5 is affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 208, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 209. Embodiment 209. FIG. 209 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 209 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2 as means for detecting the amount of nitrogen flowing into the biological water treatment apparatus, and detects the amount of phosphorus discharged. A means for calculating the difference between the concentration of phosphoric acid phosphorus in the sewage in the mixture in the anaerobic tank and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank. The equipment is configured to regulate the amount of sewage flowing into the sedimentation basin. In FIG. 209, reference numeral 200 denotes a signal for setting the amount of sewage flowing into the first sedimentation basin to a predetermined value in accordance with the output value of the controller 26 and the output value of the controller 124.
This is an arithmetic unit that outputs to The arithmetic unit 200 is connected to the signal line 26
b, a signal line 26a, a controller 124 via a signal line 124a, and a first settling basin inflow pump 14 via a signal line 200a. Other components are shown in Figure 1.
4 and FIG. 203 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0926] As described above, according to this embodiment 209, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the effluent is determined according to a predetermined difference from the target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to the embodiment 209, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 and the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 are measured, and the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 and adjusting the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the value and the predetermined target value, Since the discharge amount of phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 209, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 209, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Also, in this embodiment 209
According to the method, a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, so that the SS component in the bypass flow to the anaerobic tank 5 is small, and The effect of reducing the load on the pump 11 is obtained.

[0927] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. However, the amount of nitrogen in ammonia is measured. The device may be configured.

[0928] Embodiment 210 FIG. 210 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 210 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as means for detecting the amount of nitrogen flowing into a biological water treatment apparatus, and detects the amount of phosphorus discharged. A means is provided for calculating the difference between the phosphoric acid phosphorus concentration in the sewage in the mixture in the anaerobic tank and the phosphoric acid phosphorus concentration in the sewage flowing into the biological reaction tank. The equipment is configured to regulate the amount of sewage flowing into the sedimentation basin. In FIG. 210, reference numeral 200 designates a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 27 and the output value of the controller 124.
4 is an arithmetic unit for outputting the result to The arithmetic unit 200 is connected to the signal line 2
7b, a signal line 26a, a controller 124 via a signal line 124a, and a first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 203, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 203, the amount of sewage flowing into the first settling basin is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

[0930] As described above, according to this embodiment 210, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the twenty-first embodiment
According to 0, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 are measured, and the calculated value of the difference between the concentration and the predetermined target is determined. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation tank 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the values and the amount of phosphorus discharged. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 210, the amount of sewage flowing into first settling basin 1 is adjusted,
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to this embodiment 210, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. In addition, according to this embodiment 210, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0931] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 211. FIG. 211 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 211 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an anaerobic tank as a means for detecting the discharge amount of phosphorus. The apparatus is provided with a device for estimating the concentration of phosphoric acid and phosphorus in the mixed liquid in the tank, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 211,
Reference numeral 14 denotes a first sedimentation tank inflow pump provided on the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1.

[0933] Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in sewage in the mixed solution in the anaerobic tank 4.
131 is a setting device for setting a target value of the phosphoric acid phosphorus concentration,
171 is a storage circuit for accumulating data on the concentration of phosphoric acid and phosphorus in the sewage in the mixed solution in the anaerobic tank 4, and 182 is a storage circuit 17
A calculator for estimating the phosphoric acid phosphorus concentration in the sewage in the mixed solution in the anaerobic tank 4 using the phosphoric acid phosphorus concentration data accumulated in 1; The signal which makes the amount of sewage flowing into the anaerobic tank 4 a predetermined value according to the difference from the target value set in the arithmetic unit 200
The controller 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 21 and the output value of the controller 121. It is a computing unit that performs The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The storage circuit 171 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a. The arithmetic unit 182 is connected to the storage circuit 171 via the signal line 171a. The controller 121 is connected to the arithmetic unit 182 via a signal line 182a and to the setting unit 131 via a signal line 131a. The arithmetic unit 200 is
The signal line 21a and the signal line 121a are connected via the signal line 21b.
And a first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured by a phosphoric acid phosphorus concentration meter 142.
, And the measured value is transmitted to the storage circuit 171 via the signal line 142a. The arithmetic unit 182 includes a storage circuit 171
The phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time is estimated using the phosphoric acid phosphorus concentration data accumulated in the tank. This can be easily performed using a statistical analysis method such as the least square method. The data of the phosphoric acid concentration required for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the arithmetic unit 182 is transmitted to the controller 121 via the signal line 182a. Also,
The target value set in the setter 131 is transmitted to the controller 121 via the signal line 131a. The controller 121 determines the amount of sewage flowing into the anaerobic tank 4 according to the difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value, for example (8.1).
A signal having a value obtained according to an equation similar to the equation is output. The output of the adjuster 121 is transmitted to the arithmetic unit 200 via the signal line 121a.

The computing unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 121. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the first settling tank inflow pump 14 via the signal line 200a.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases, and the amount of sewage flowing into the anoxic tank 5 by the bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the anaerobic tank 4 increases due to an increase in the amount of sewage flowing into the sedimentation basin 1, and the amount of organic matter entering the anaerobic tank 4 increases. The supply increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases, and the amount of sewage flowing into the anaerobic tank 4 decreases. The organic matter supply is reduced. As a result, the phosphorus discharge is reduced, and the phosphorus removal amount is reduced.

As described above, according to this embodiment 211, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 211, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated sewage in the mixed solution in the anaerobic tank 4 is measured using the stored data of the phosphoric acid phosphorus concentration. Is estimated by adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and the predetermined target value. Since the amount of organic matter supplied to the tank 4 is adjusted and the discharge amount of phosphorus is kept constant, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. can get. In addition, according to this Embodiment 211, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Further, according to this embodiment 211, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained.
In addition, according to the embodiment 211, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, the SS component in the bypass flow to the anaerobic tank 5 is small, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0938] Embodiment 212 FIG. 212 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 212 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of discharged phosphorus in an anaerobic tank. The apparatus is provided with a device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG.
Numeral 0 denotes a calculator for outputting to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 121.
The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b.
, A controller 121 via a signal line 121a, and a signal line 2
The first settling basin inflow pump 14 is connected to the first settling basin inflow pump 14 via the first settling tank. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 211, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 212, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 212, the concentration of phosphoric acid phosphorus in sewage in the mixed solution in anaerobic tank 4 is measured, and the concentration of phosphoric acid phosphorus in anaerobic tank 4 is measured using accumulated phosphoric acid phosphorus concentration data. Of the concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 according to the difference between the estimated value and a predetermined target value. Thus, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained. Further, according to the embodiment 212, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 212, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.
Further, according to the embodiment 212, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0941] Embodiment 213. FIG. 213 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 213 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as means for detecting the amount of denitrification, Equipped with a device for estimating the concentration of phosphoric acid and phosphorus in sewage in the mixed solution in the anaerobic tank as a means for detecting
The apparatus is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin.
In FIG. 213, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal that sets the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 23 and the output value of the controller 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 23b.
And a controller 121 via a signal line 121a, and a first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 211, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 213, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen of the discharge water in the mixed solution in the oxygen-free tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 213, the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the stored data of the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured. Of the concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 according to the difference between the estimated value and a predetermined target value. Thus, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained. Also, according to this embodiment 213,
Since the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage flowing into the anoxic tank 5 by bypass are adjusted, the anaerobic tank 4
The effect of adjusting the amount of sewage flowing into the anoxic tank 5 without affecting the amount of organic substances supplied to the anoxic tank 5 can be obtained. Further, according to this embodiment 213,
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1, the amount of sewage flowing into the anaerobic tank 4 is controlled without affecting the amount of organic substances supplied to the anoxic tank 5. The effect that the amount of water can be adjusted is obtained. According to this embodiment 213, part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 214. FIG. 214 is a configuration diagram showing a control device of the biological water treatment apparatus according to the embodiment 214 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The system is provided with a device for estimating the concentration of phosphoric acid and phosphorus in the sewage in the sewage, and is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 214, each component is the same as or similar to that shown in FIG. 8 and FIG.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 214, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

As described above, according to this embodiment 214, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5, and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass in accordance with the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 214, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the data of the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is used. Of the concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 according to the difference between the estimated value and a predetermined target value. Thus, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained. Also, in this embodiment 214
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. Further, the twenty-first embodiment
According to 1, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. Further, according to this embodiment 214, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

Embodiment 215. FIG. 215 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 215 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is provided with a device for estimating the concentration of phosphoric acid and phosphorus in the sewage in the liquid, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG.
Numeral 0 denotes a calculator for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 24 and the output value of the controller 121.
The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b.
, A controller 121 via a signal line 121a, and a signal line 2
The first settling basin inflow pump 14 is connected to the first settling basin inflow pump 14 via the first settling tank. Other components are the same as or equivalent to those shown with the same reference numerals in FIGS.
Detailed description is omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0949] As described above, according to this embodiment 215, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 215, the concentration of phosphoric acid in the mixed solution in the anaerobic tank 4 is measured, and the concentration of the phosphoric acid in the mixed solution in the anaerobic tank 4 is measured using the accumulated data of the concentration of the phosphoric acid. Of the concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 according to the difference between the estimated value and a predetermined target value. Thus, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained. In addition, according to the embodiment 215, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to the embodiment 215, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 215, since a part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass, the SS component in the bypass flow to oxygen free tank 5 is small, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0950] In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good.

Embodiment 216. Embodiment 216. FIG. 216 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 216 of the present invention. The present embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the discharge amount of phosphorus in the anaerobic tank. The apparatus is provided with a device for estimating the concentration of phosphoric acid and phosphorus in the sewage in the liquid, and the device is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 216, 20
Numeral 0 denotes an arithmetic unit for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 25 and the output value of the controller 121.
The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b.
, A controller 121 via a signal line 121a, and a signal line 2
The first settling basin inflow pump 14 is connected to the first settling basin inflow pump 14 via the first settling tank. Other components are the same as or equivalent to those shown with the same reference numerals in FIGS.
Detailed description is omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 216, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 216, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data in the mixed solution in the anaerobic tank 4 are used. The phosphoric acid phosphorus concentration of sewage
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1 and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the estimated value and a predetermined target value. However, since the amount of phosphorus discharged is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 216, the amount of sewage flowing into sedimentation basin 1 is adjusted, and the amount of sewage flowing into bypass tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 216, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. In addition, according to this embodiment 216, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0954] In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. Good.

Embodiment 217. Embodiment 217. FIG. 217 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 217 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. The apparatus is provided with a device for estimating the concentration of phosphoric acid and phosphoric acid in the mixed liquid therein, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 217, reference numeral 200 denotes an operation for outputting to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 26 and the output value of the controller 121. It is a vessel. The arithmetic unit 200 includes a signal line 26a via a signal line 26b and a controller 121 via a signal line 121a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to Other components are shown in FIG. 14 and FIG.
11 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 217, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 217, the phosphoric acid phosphorus concentration in the sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data in the mixed solution in the anaerobic tank 4 are used. The concentration of phosphoric acid and phosphorus in the sewage, and adjusting the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anaerobic tank 4 in accordance with the difference between the estimated value and a predetermined target value. Therefore, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the discharge amount of phosphorus is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. The effect is obtained. Further, according to this embodiment 217, since the amount of sewage flowing into sedimentation basin 1 is adjusted at the same time as the amount of sewage flowing into bypass tank 5 is adjusted, the amount of organic matter supplied to anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 217, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Also, according to this embodiment 217, part of the sewage flowing out of sedimentation basin 1 first is supplied to anoxic tank 5
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

[0958] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured.

Embodiment 218. Embodiment 218. FIG. 218 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 218 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and an anaerobic tank as a means for detecting the phosphorus discharge amount. The apparatus is provided with a device for estimating the concentration of phosphoric acid and phosphoric acid in the mixed liquid therein, and the device is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 218, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 27 and the output value of the controller 121. It is a vessel. The arithmetic unit 200 includes a signal line 27a via a signal line 27b and a controller 121 via a signal line 121a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to Other components are shown in FIG. 16 and FIG.
11 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of Embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0961] As described above, according to this embodiment 218, the total nitrogen concentration of sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the twenty-first embodiment
According to No. 8, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured using the accumulated phosphoric acid phosphorus concentration data. The concentration is estimated, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to the difference between the estimated value and a predetermined target value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted to supply the anaerobic tank 4. Since the amount of organic substances to be discharged is adjusted and the amount of discharged phosphorus is kept constant, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained.
In addition, according to this embodiment 218, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 218, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 218, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0962] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. However, the amount of ammonia nitrogen is measured. The device may be configured.

Embodiment 219. FIG. 219 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 219 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing out of the system. A means to measure the phosphoric acid phosphorus concentration of the effluent as a means to control the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 219, reference numeral 14 denotes a first sedimentation basin inflow pump provided on a pipe a for adjusting the flow rate of sewage flowing into the first sedimentation basin 1.

[0964] Reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the discharged water, 135 a setter for setting a target value of the phosphoric acid phosphorus concentration, and 125 a measured value of the phosphoric acid phosphorus concentration meter 146. A controller that outputs a signal for setting the amount of sewage flowing into the anaerobic tank 4 to a predetermined value in accordance with a difference from the target value set in the setter 135 to the arithmetic unit 200. This is a controller for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the vessel 125. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 125 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a and to the setting device 135 via a signal line 135a. The arithmetic unit 200 includes a signal line 21a via a signal line 21b and a controller 125 via a signal line 125a.
And the first sedimentation tank inflow pump 14 via the signal line 200a.
Is connected to The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The concentration of phosphoric acid in the effluent is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 125 via a signal line 146a. Further, the target value set in the setting device 135 is a signal line 135
is transmitted to the controller 125 via a. Controller 125
Calculates the amount of sewage flowing into the anaerobic tank 4 by, for example, (1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value.
2.1) Output a signal having a value obtained according to the same equation as the equation. The output of the adjuster 125 is transmitted to the arithmetic unit 200 via the signal line 125a.

[0967] The computing unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 first according to, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 125. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the first settling tank inflow pump 14 via the signal line 200a.

[0967] From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 increases and the amount of sewage flowing into the anoxic tank 5 increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. If the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 increases, and the amount of sewage flowing into the anaerobic tank 4 increases. The supply increases. As a result, the phosphorus discharge amount increases, and the phosphorus removal amount increases. Conversely, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the sedimentation basin 1 decreases first, and the amount of sewage flowing into the anaerobic tank 4 decreases. The organic matter supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to Embodiment 219, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 220, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value, so that the amount flowing into the anaerobic tank 4 is controlled. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of water, and the amount of phosphorus discharged is kept constant. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is changed. Can be reliably reduced. In addition, according to the embodiment 220, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 220, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 220, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0969] In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. However, the apparatus may be configured to measure the total phosphorus concentration. Good.

Embodiment 220. FIG. 220 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 220 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the apparatus is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 220, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b, the controller 125 via the signal line 125a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 219, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 220, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential of the sewage is measured according to a difference from a predetermined target value. Oxygen-free tank 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 220, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted according to the difference from a predetermined target value to adjust the amount of sewage into the anaerobic tank 4. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowed sewage, and the amount of phosphorus discharged is kept constant. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. The effect of reliably reducing the amount of is obtained. In addition, according to the embodiment 220, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 220, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 220, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0973] In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 221. Embodiment 221. FIG. 221 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 221 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and is provided outside the system. As a means of detecting the amount of phosphorus that flows out, a phosphate phosphor concentration meter that measures the concentration of phosphoric acid in the effluent is provided to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as follows. In FIG. 221, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal that sets the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 23 and the output value of the controller 125. It is a vessel. Arithmetic unit 200 is connected to signal line 23a via signal line 23b, controller 125 via signal line 125a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 219, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 221, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen of the discharge water in the mixed solution in the anoxic tank 5 are measured, and the difference between them is measured. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of organic waste supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the anoxic tank 5 according to the difference between the calculated value and a predetermined target value, Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 221, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage to the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. The effect of reliably reducing the amount of is obtained. In addition, according to this embodiment 221, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 221, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 221, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0977] In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 222. FIG. 222 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 222 of the present invention. This embodiment includes an apparatus for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank,
As a means to detect the amount of phosphorus that flows out of the system, a phosphate phosphoric acid concentration meter that measures the concentration of phosphoric acid in the effluent is provided. The device is configured to adjust. In FIG. 222, each component is shown in FIGS.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

As described above, according to Embodiment 222, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 222, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage to the anaerobic tank 4. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowed sewage, and the amount of phosphorus discharged is kept constant. Therefore, even when the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. Has the effect of reliably reducing the amount of. In addition, according to this Embodiment 222, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 222, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this Embodiment 222, part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0981] In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 223. Embodiment 223. FIG. 223 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 223 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 223, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal that sets the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 24 and the output value of the controller 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b, the controller 125 via the signal line 125a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 10 and 219, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0984] As described above, according to this embodiment 223, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage that flows into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 223, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value to adjust the amount of sewage into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system changes. The effect of reliably reducing the amount of is obtained. Further, according to this embodiment 223, the amount of sewage flowing into the sedimentation basin 1 is adjusted, and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to the embodiment 223, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.
Further, according to this embodiment 223, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0985] In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 224. Embodiment 224. FIG. 224 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 224 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 224, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 25 and the output value of the controller 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b, the controller 125 via the signal line 125a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 12 and 219, and a detailed description thereof will be omitted.

[0987] Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[0988] As described above, according to this embodiment 224, the concentration of the nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 224, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to the difference from a predetermined target value. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of inflowing sewage, and the amount of phosphorus discharged is kept constant. The effect of reliably reducing the amount of is obtained. Further, according to this embodiment 224, the amount of sewage flowing into first sedimentation basin 1 is adjusted, and anoxic tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Further, according to this embodiment 224, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. Further, according to this embodiment 224, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0989] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 225. Embodiment 225. FIG. 225 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 225 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total concentration of sewage flowing into the biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. As a means, it is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the device is configured to regulate the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. . FIG.
At 25, 200 is the output value of the controller 26 and the controller 1
The arithmetic unit outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of 25. The arithmetic unit 200 is connected to the signal line 26a via the signal line 26b and the controller 1 via the signal line 125a.
25 and a first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 219, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 225, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference between the predetermined total value of the total nitrogen concentration of the discharged water and the target value. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 225, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value, and the anaerobic tank 4
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. The effect of reliably reducing the amount of phosphorus to be obtained is obtained. In addition, according to this embodiment 225, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 225, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. According to this embodiment 225, part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[0993] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 226. Embodiment 226. FIG. 226 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 226 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A means to measure the concentration of phosphoric acid in the effluent, and configure the device to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 226, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 27 and the output value of the controller 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the controller 125 via the signal line 125a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 219, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 226, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the twenty-second embodiment
According to 6, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the difference from a predetermined target value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. In this way, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. In addition, according to this embodiment 226, the amount of sewage flowing into the sedimentation basin 1 is adjusted, and the amount of sewage flowing into the anoxic tank 5 is adjusted.
Without affecting the amount of organic matter supplied to the anaerobic tank 4,
The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass is obtained. Furthermore, according to this embodiment 226, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 226, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 227. Embodiment 227. FIG. 227 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 227 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing out of the system. A means to measure the phosphoric acid phosphorus concentration of the effluent as a means to control the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 227, reference numeral 14 denotes a first sedimentation basin inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation basin 1.

[0999] Further, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and 126 denotes a predetermined value of the amount of sewage flowing into the anaerobic tank 4 in accordance with the measurement value of the phosphoric acid phosphorus concentration meter 146. The controller 200 outputs a signal that initially sets the amount of sewage flowing into the sedimentation basin 1 to a predetermined value in accordance with the output value of the controller 21 and the output value of the controller 126. A computing unit that outputs to the pond inflow pump 14. The phosphoric acid phosphorus concentration meter 146 is provided on the pipe d. The controller 126 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a. Arithmetic unit 200
Are connected to the signal line 21a via the signal line 21b and the signal line 12
The controller 126 is connected via 6a and the first settling tank inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The concentration of phosphoric acid in the discharged water is measured by a phosphoric acid concentration meter 146, and the measured value is transmitted to the controller 126 via a signal line 146a. The controller 126 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained according to, for example, a formula similar to the formula (13.1) according to the measured value of the phosphoric acid phosphorus concentration. Controller 1
The output of 26 is transmitted to arithmetic unit 200 via signal line 126a.

The computing unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 126. Outputs a signal as a value. The output of arithmetic unit 200 is signal line 2
00a to the first settling basin inflow pump 14.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases and the amount of sewage flowing into the anoxic tank 5 by the bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. In addition, depending on how large the measured value of the phosphoric acid phosphorus concentration is, the amount of sewage flowing into the first sedimentation basin 1 is increased or decreased, so that the anaerobic tank 4 is increased.
The amount of sewage flowing into the tank increases and decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases and decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to this embodiment 227, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 227, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into sedimentation basin 1 and the amount of sewage flowing into anaerobic tank 4 are adjusted according to the measured value. Adjusts the amount of organic substances supplied to the anaerobic tank 4 and adjusts the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. Is obtained. In addition, Embodiment 22
According to 7, the amount of sewage flowing into the first sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted by bypass. The effect of being able to adjust the amount of sewage flowing into the tank 5 by bypass is obtained. Further, the twenty-second embodiment
According to 7, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1, so that the amount of organic matter supplied to the anoxic tank 5 is not affected and the anaerobic tank is not affected. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. Further, according to this embodiment 227, part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

[1005] Embodiment 228. FIG. 228 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 228 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent, and the apparatus is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 228, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b, the controller 126 via the signal line 126a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 227, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 228, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to this embodiment 228, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into anaerobic tank 4. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. Also, in this embodiment 228
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. Further, the twenty-second embodiment
According to FIG. 8, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1, the amount of organic matter supplied to the anoxic tank 5 is not affected and the anaerobic tank is not affected. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. Further, according to this embodiment 228, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is low in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1008] In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

Embodiment 229. FIG. 229 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 229 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the anoxic tank as a means for detecting the amount of denitrification, and is provided outside the system. As a means of detecting the amount of phosphorus that flows out, a phosphate phosphor concentration meter that measures the concentration of phosphoric acid in the effluent is provided to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. The apparatus is configured as follows. In FIG. 229, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 23 and the output value of the controller 126. It is a vessel. Arithmetic unit 200 is connected to signal line 23a via signal line 23b, controller 126 via signal line 126a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 227, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 229, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the discharge water in the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 229, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted according to the measured value to adjust the amount of sewage flowing into anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. In addition, according to this embodiment 229, the amount of sewage flowing into the first settling basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted.
Without affecting the amount of organic matter supplied to the anaerobic tank 4,
The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass is obtained. Furthermore, according to this embodiment 229, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. Further, according to this embodiment 229, since a part of the sewage flowing out from sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1012] In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent. Good.

[1013] Embodiment 230 FIG. 230 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 230 of the present invention. The present embodiment has a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and discharges the gas as a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in water, and the apparatus is configured to regulate the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 230, each component is the same as or equivalent to the component shown in FIG. 8 and FIG.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

[1015] As described above, according to Embodiment 230, the nitrate nitrogen concentration of the sewage in the mixture in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 230, the concentration of phosphoric acid and phosphorus in the effluent is measured, and first settling tank 1
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to the embodiment 230, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Furthermore, according to this embodiment 230, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. Further, according to this embodiment 230, part of the sewage flowing out of sedimentation basin 1 first is supplied to anoxic tank 5
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

[1016] In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the discharged water. Good.

Embodiment 231. FIG. 231 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 231 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 231, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 24 and the output value of the controller 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a via the signal line 24b, the controller 126 via the signal line 126a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 10 and 227, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 231, the nitrate nitrogen concentration of the effluent is measured, and the amount of the sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, according to this embodiment 231, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. In addition, according to this embodiment 231, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Furthermore, according to this embodiment 231, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. Further, according to this embodiment 231, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component in the bypass flow to the anoxic tank 5 is small, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1020] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 232. FIG. 232 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 232 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing out of the system. The apparatus is provided with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the effluent, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. In FIG. 232, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 25 and the output value of the controller 126. It is a vessel. Arithmetic unit 200 is connected to signal line 25a via signal line 25b, controller 126 via signal line 126a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 12 and 227, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 232, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage bypassed into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 232, the concentration of phosphoric acid and phosphoric acid in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into the anaerobic tank 4. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. Also,
According to this embodiment 232, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. Therefore, the effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass is obtained. further,
According to this embodiment 232, since the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1, the amount of organic matter supplied to anaerobic tank 5 is affected. Therefore, the effect of adjusting the amount of sewage flowing into the anaerobic tank 4 can be obtained. In addition, this Embodiment 23
According to 2, since a part of the sewage flowing out of the sedimentation basin 1 first flows into the anoxic tank 5 by bypass, the SS component in the bypass flow to the anoxic tank 5 is small, and The effect of reducing the load on the inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

[1025] Embodiment 233. FIG. 233 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 233 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A means to measure the concentration of phosphoric acid in the effluent, and configure the device to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 233, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 26 and the output value of the controller 126. It is a vessel. Arithmetic unit 200 is connected to signal line 26a via signal line 26b, controller 126 via signal line 126a, and first settling tank inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 227, and thus detailed description thereof will be omitted.

[1026] Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[1027] As described above, according to this embodiment 233, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the effluent is determined in accordance with a predetermined difference from the target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 233, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted in accordance with the measured value to adjust the amount of sewage flowing into anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. Further, according to this embodiment 233, since the amount of sewage flowing into first settling basin 1 and the amount of sewage flowing into bypass tank 5 are adjusted, the amount of organic matter supplied to anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 233, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 233, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1028] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 234. Embodiment 234. FIG. 234 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 234 of the present invention. This embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A means to measure the concentration of phosphoric acid in the effluent, and configure the device to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. is there. In FIG. 234, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 27 and the output value of the controller 126. It is a vessel. Arithmetic unit 200 is connected to signal line 27a via signal line 27b, controller 126 via signal line 126a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 227, and thus detailed description thereof will be omitted.

[1030] Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of Embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

[1031] As described above, according to this embodiment 234, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, the twenty-third embodiment
According to 4, the concentration of phosphoric acid and phosphorus in the effluent is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted according to the measured value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 234, the amount of sewage flowing into first sedimentation basin 1 is adjusted, and anoxic tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Furthermore, according to this embodiment 234, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. In addition, according to this embodiment 234, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1032] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the concentration of phosphoric acid in the effluent, but the device may be configured to measure the total phosphorus concentration.

Embodiment 235. FIG. 235 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 235 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. It is what constituted. In FIG. 235, reference numeral 14 denotes a first sedimentation basin inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation basin 1.

[1034] Reference numeral 141 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2.
137 is a setting device for setting a target value of the concentration of the phosphoric acid in the effluent water. A signal for setting the inflow sewage amount to a predetermined value is calculated by the arithmetic unit 200.
The controller 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the sedimentation basin 1 to a predetermined value according to the output value of the controller 21 and the output value of the controller 127. Computing unit. The phosphoric acid phosphorus concentration meter 141 is provided on the pipe b. The controller 127 includes a signal line 141.
a and a signal line 137
It is connected to the setting device 137 via a. Arithmetic unit 20
0 is the signal line 21a via the signal line 21b and the signal line 1
The controller 127 is connected to the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

[1035] Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value of the nitrate nitrogen concentration set in the setter 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is transmitted to the primary sedimentation-anoxic tank bypass inflow pump 11 via a signal line 21a, and is also transmitted to a computing unit 200 via a signal line 21a and a signal line 21b. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the controller 127 via the signal line 141a. The setting device 137
Is transmitted to the controller 127 via the signal line 137a. The controller 127 determines the amount of sewage flowing into the anaerobic tank 4 according to a difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, for example, according to a formula similar to the formula (14.1). Is output. Controller 1
The output of 27 is transmitted to arithmetic unit 200 via signal line 127a.

The arithmetic unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 127. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the first settling tank inflow pump 14 via the signal line 200a.

[1037] As described above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases, and the amount of sewage flowing into the anoxic tank 5 by bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Further, the amount of sewage flowing into the sedimentation basin 1 may be increased or decreased depending on how much the measured value of the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 is larger than the target value of the concentration of phosphoric acid phosphorus in the effluent. Thus, the amount of sewage flowing into the anaerobic tank 4 increases and decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases and decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

[1038] As described above, according to the embodiment 235, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 235, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid phosphorus concentration in the discharge water is set to the first sedimentation basin 1 in accordance with a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Therefore, the effect that the amount of phosphorus flowing out of the system can be reliably reduced even when the value fluctuates. In addition, according to this embodiment 235, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 235, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 235, part of the sewage flowing out of sedimentation basin 1 is first removed from anoxic tank 5.
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

[1039] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 236. Embodiment 236. FIG. 236 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 236 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and configures the device to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank It was done. In FIG. 236, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 127. It is a vessel. Arithmetic unit 200 is connected to signal line 22a via signal line 22b, controller 127 via signal line 127a, and first settling tank inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 235, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 236, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to the difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 236, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first sedimentation basin is determined according to a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. 1
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and adjusting the amount of sewage flowing into the anaerobic tank 4,
Since the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. In addition, according to this embodiment 236, since the amount of sewage flowing into first settling basin 1 and the amount of sewage bypassed into anoxic tank 5 are adjusted, the amount of organic matter supplied to anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to this embodiment 236, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 236, a part of the sewage flowing out of sedimentation basin 1 is first supplied to anoxic tank 5
Therefore, the SS component is small in the bypass flow to the anoxic tank 5, and the effect of reducing the load on the primary sink-anoxic tank bypass inflow pump 11 is obtained.

[1043] In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the total phosphorus concentration is measured. The device may be configured.

Embodiment 237. FIG. 237 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 237 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. As a means for detecting the amount of inflowing phosphorus, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in sewage flowing into the biological reaction tank 2 is provided. The device is configured to regulate the amount of sewage. In FIG. 237, 2
Reference numeral 00 denotes a calculator which outputs a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 23 and the output value of the controller 127 to the first settling tank inflow pump 14. The arithmetic unit 200 is connected to the signal line 23 via the signal line 23b.
a, the controller 127 via a signal line 127a and the first settling basin inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 235.
Detailed description is omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 237, the concentration of nitrate nitrogen in the sewage and the concentration of nitrate in the effluent of the mixture in the anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 237, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling basin is determined according to the difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged from the system is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained. In addition, according to this embodiment 237, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is not affected. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Furthermore, according to this embodiment 237, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first.
The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5 is obtained. According to this embodiment 237,
Since a part of the sewage flowing out of the first sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and the load of the initial sedimentation-anoxic tank bypass inflow pump 11 is reduced. Is obtained.

[1047] In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 238. FIG. 238 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 238 of the present invention. This embodiment is provided with a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of phosphorus flowing in from outside the system. A device equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the reaction tank, and is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank It is. In FIG. 238, each component is the same as or equivalent to that shown in FIG. 8 and FIG. 235 by the same reference numeral, and a detailed description thereof is omitted.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

[1050] As described above, according to the embodiment 238, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the concentration of the nitrate nitrogen is measured using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 238, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling tank is determined in accordance with the difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged from the system is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained. According to this embodiment 238, the amount of sewage flowing into sedimentation basin 1 is adjusted and the amount of sewage flowing into anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 238, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 238, since a part of the sewage flowing out of sedimentation basin 1 flows into oxygen-free tank 5 by bypass, SS component is small in the bypass flow to oxygen-free tank 5, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1051] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 239. FIG. 239 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 239 of the present invention. This embodiment includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and a biological means as a means for detecting the amount of phosphorus flowing in from outside the system. A device equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the reaction tank, and is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank It is. In FIG. 239, reference numeral 200 designates a signal for setting the amount of sewage flowing into the sedimentation basin 1 to a predetermined value in accordance with the output value of the controller 24 and the output value of the controller 127.
4 is an arithmetic unit for adjusting the output. Arithmetic unit 200 is connected to signal line 24a via signal line 24b, controller 127 via signal line 127a, and first settling tank inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 10 and 235, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 239, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Further, according to this embodiment 239, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first sedimentation basin is determined according to a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged from the system is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained. In addition, according to this embodiment 239, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. Anoxic tank 5 without giving
The effect of being able to adjust the amount of sewage flowing into the bypass is obtained. Further, according to this embodiment 239, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Also,
According to this embodiment 239, a part of the sewage that first flows out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass.
In the bypass flow to the anoxic tank 5, the SS component is small, and the effect of reducing the load on the initial settling-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

[1056] Embodiment 240 FIG. 240 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 240 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and configured to control the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. Things. In FIG. 240, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 25 and the output value of the controller 127. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b, the controller 127 via the signal line 127a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 12 and 235, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 240, the concentration of nitrate nitrogen in the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value. Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Furthermore, according to the embodiment 240, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the concentration of the phosphoric acid in the first settling basin is determined according to a difference between the predetermined value and the target value of the concentration of phosphoric acid in the discharge water. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged from the system is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained. In addition, according to this embodiment 240, since the amount of sewage flowing into sedimentation basin 1 is adjusted and the amount of sewage flowing into bypass tank 5 is adjusted, the amount of organic matter supplied to anaerobic tank 4 is not affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Further, according to the embodiment 235, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 240, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen-free tank 5, and the SS component is low. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1059] In the present embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 241. FIG. 241 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 241 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. It is what constituted. In FIG. 241, reference numeral 200 denotes an operation for outputting to the first sedimentation basin inflow pump 14 a signal that sets the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 26 and the output value of the controller 127. It is a vessel. Arithmetic unit 20
0 is the signal line 26a via the signal line 26b and the signal line 1
The controller 127 is connected to the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 235, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 241, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined in accordance with a predetermined difference from the target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 241, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first sedimentation basin is determined according to a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of phosphorus flowing out of the system even when the concentration or the concentration fluctuates is obtained. In addition, according to this embodiment 241, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to the embodiment 241, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 241, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, the SS component in the bypass flow to the anaerobic tank 5 is small, and The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1063] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. An apparatus may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 242. FIG. 242 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 242 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. It is what constituted. In FIG. 242, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal that sets the amount of sewage flowing into the sedimentation basin 1 to a predetermined value according to the output value of the controller 27 and the output value of the controller 127. It is a vessel. Arithmetic unit 20
0 is the signal line 27a via the signal line 27b and the signal line 1
The controller 127 is connected to the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 235, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Further, as in the case of the embodiment 235, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 242, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage bypassed into the anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . In addition, this Embodiment 24
According to 2, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the amount of the sewage flowing into the first sedimentation basin 1 is determined according to a difference from a predetermined target value of the phosphoric acid phosphorus concentration of the discharge water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4 and the amount of phosphorus discharged is adjusted. Therefore, when the flow rate or concentration of sewage flowing from outside the system fluctuates. However, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained. Further, according to this embodiment 242, the amount of sewage flowing into first settling basin 1 is adjusted and the amount of sewage flowing into bypass tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to the embodiment 242, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained.
According to this embodiment 242, part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. The device may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 243. FIG. 243 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 243 of the present invention. This embodiment is provided with a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and detects the amount of phosphorus flowing in from outside the system. A means for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 as a means for controlling the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. It constitutes the device. In FIG. 243, reference numeral 14 denotes a first sedimentation basin inflow pump provided on a pipe a for adjusting the flow rate of sewage flowing into the first sedimentation basin 1.

Also, reference numeral 141 denotes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the inflow water flowing into the biological reaction tank 2, and reference numeral 128 denotes an inflow to the anaerobic tank 4 in accordance with the measurement value of the phosphoric acid phosphorus concentration meter 141. A controller for outputting a signal for setting the amount of sewage to a predetermined value to the arithmetic unit 200. This is an arithmetic unit that outputs a signal as a value to the settling tank inflow pump 14 first. Phosphoric acid concentration meter 1
41 is provided in the pipe b. The controller 128 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The arithmetic unit 200 includes a signal line 21a via a signal line 21b, a controller 128 via a signal line 128a,
The first settling basin inflow pump 14 is connected via a signal line 200a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
And transmitted to the primary sedimentation-oxygen-free tank bypass inflow pump 11 via the signal line 21a and the signal line 21b. The phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured by a phosphoric acid phosphorus concentration meter 141.
Is measured by the controller 1 via the signal line 141a.
28. The controller 128 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 by bypass in accordance with the measured value of the phosphoric acid phosphorus concentration, for example, according to a formula similar to the formula (15.1). The output of the controller 128 is the signal line 12
8a is transmitted to the arithmetic unit 200.

The arithmetic unit 200 obtains the amount of sewage flowing into the sedimentation basin 1 in accordance with, for example, a formula similar to the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 128. Outputs a signal as a value. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 via the signal line 200a.

From the above, if the measured value of the concentration of nitrate nitrogen is larger than the target value, the amount of sewage flowing into the sedimentation basin 1 first increases and the amount of sewage flowing into the anoxic tank 5 by the bypass increases. The amount of organic matter supplied to the tank 5 increases. As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 decreases, and the amount of sewage flowing into the anoxic tank 5 decreases.
The supply of organic matter to the plant is reduced. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. In addition, depending on how large the measured value of the phosphoric acid phosphorus concentration is, the amount of sewage flowing into the first sedimentation basin 1 is increased or decreased, so that the anaerobic tank 4 is increased.
The amount of sewage flowing into the tank increases and decreases, and the amount of organic matter supplied to the anaerobic tank 4 increases and decreases. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

As described above, according to this embodiment 243, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. further,
According to this embodiment 243, the concentration of phosphoric acid and phosphoric acid in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is first adjusted according to the measured value to flow into anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage, and the amount of phosphorus discharged is adjusted, the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. Can be reliably reduced. Further, according to this embodiment 243, the amount of sewage flowing into first settling basin 1 and the amount of sewage bypassed into anoxic tank 5 are adjusted, so that the amount of organic matter supplied to anaerobic tank 4 is affected. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass can be obtained without giving it. Further, according to the embodiment 243, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained. Further, according to this embodiment 243, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 244. Embodiment 244. FIG. 244 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 244 of the present invention. This embodiment is provided with an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of sewage in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and configures the device to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank It was done. In FIG. 244, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 22 and the output value of the controller 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a via the signal line 22b, the controller 128 via the signal line 128a, and the first sedimentation tank inflow pump 14 via the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 4 and 243, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 4
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (2.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 244, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-reduction potential is measured according to a difference from a predetermined target value. Anoxic tank 5 by adjusting the amount of sewage flowing into bypass 5
Since the amount of organic substances supplied to the system is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 244, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into first sedimentation basin 1 is adjusted according to the measured value, and the amount is adjusted to anaerobic tank 4. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of is obtained. Also,
According to this embodiment 244, since the amount of sewage flowing into the first settling basin 1 and the amount of sewage flowing into the anoxic tank 5 are adjusted, the amount of organic substances supplied to the anaerobic tank 4 is affected. Therefore, the effect of adjusting the amount of sewage flowing into the anoxic tank 5 by bypass is obtained. further,
According to this embodiment 244, since the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1, the amount of organic matter supplied to anoxic tank 5 is affected. Therefore, the effect of adjusting the amount of sewage flowing into the anaerobic tank 4 can be obtained. In addition, this Embodiment 24
According to 4, since a part of the sewage flowing out of the sedimentation basin 1 flows into the anoxic tank 5 by bypass, the SS component is small in the bypass flow to the anoxic tank 5, and the primary sedimentation-oxygen tank bypass. The effect of reducing the load on the inflow pump 11 is obtained.

[1078] In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 245. FIG. 245 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 245 of the present invention. This embodiment is provided with a device for calculating the difference between the concentration of nitrate nitrogen in the sewage and the concentration of nitrate nitrogen in the effluent of the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. As a means to detect the amount of inflowing phosphorus, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid in sewage flowing into the biological reaction tank is provided. The device is configured to regulate the amount of water. In FIG. 245, 20
Numeral 0 denotes a calculator for outputting to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 23 and the output value of the controller 128.
The arithmetic unit 200 is connected to the signal line 23a via the signal line 23b.
Controller 128 via signal line 128a, and signal line 2
The first settling basin inflow pump 14 is connected to the first settling basin inflow pump 14 via the first settling tank. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 6 and 243, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 6
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (3.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (24.
A signal having a value obtained according to the same equation as equation (1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 245, the concentration of nitrate nitrogen in sewage and the concentration of nitrate nitrogen in effluent of a mixed solution in anoxic tank 5 are measured, and the difference between them is measured. The amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of the sewage flowing into the anoxic tank 5 according to the difference between the calculated value and the predetermined target value. Even if the flow rate or concentration fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 245, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is first adjusted according to the measured value, and the amount is adjusted to anaerobic tank 4. The amount of organic matter to be supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Has the effect of reliably reducing the amount of. In addition, according to this embodiment 245, the amount of sewage flowing into the sedimentation basin 1 is adjusted, and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 245, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Also, in this embodiment 245
According to the method, a part of the sewage flowing out of the sedimentation basin 1 flows into the anaerobic tank 5 by bypass, so that the SS component in the bypass flow to the anaerobic tank 5 is small, and The effect of reducing the load on the pump 11 is obtained.

[1082] In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. An apparatus may be configured.

Embodiment 246. FIG. 246 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 246 of the present invention. The present embodiment is provided with a device for estimating the concentration of nitrate nitrogen in sewage in a mixed solution in an anoxic tank as a means for detecting the amount of denitrification, and as a means for detecting the amount of phosphorus flowing in from outside the system. It is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage water flowing into the reaction tank 2, and is configured to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. It was done. In FIG. 246, each component is shown in FIGS.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 8
In the same manner as in the case (1), the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the same equation as the equation (1.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal of a value obtained according to the same equation as the equation (24.1) is output to the settling tank inflow pump 14 first.

As described above, according to this embodiment 246, the nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured, and the nitrate nitrogen concentration data is stored using the accumulated nitrate nitrogen concentration data. By estimating the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen tank 5 and adjusting the amount of sewage flowing into the anoxic tank 5 by bypass according to the difference between the estimated value and a predetermined target value, Since the amount of organic matter supplied to the oxygen tank 5 is adjusted, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 246, the concentration of phosphoric acid in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the first sedimentation basin 1 is adjusted according to the measured value to thereby adjust the anaerobic tank 4.
The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. Therefore, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the sewage flows out of the system. The effect of reliably reducing the amount of phosphorus is obtained. In addition, according to this embodiment 246, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect of adjusting the amount of sewage flowing into the anoxic tank 5 without bypass is obtained. Furthermore, according to this embodiment 246, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is not affected. Without giving, the effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. In addition, according to this embodiment 246, part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2. However, the total phosphorus concentration is measured. The device may be configured.

Embodiment 247. FIG. 247 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 247 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and configured to control the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. Things. In FIG. 247, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 24 and the output value of the controller 128. It is a vessel. Arithmetic unit 200 is connected to signal line 24a via signal line 24b, controller 128 via signal line 128a, and first settling basin inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 10 and 243, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
Similarly to the case of 0, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (4.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 247, the nitrate nitrogen concentration of the effluent is measured, and the amount of sewage flowing into the anoxic tank 5 is determined according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . Furthermore, according to this embodiment 247, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is first adjusted according to the measured value, and the amount is adjusted to anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of is obtained. Also, in this embodiment 247,
According to the method, the amount of sewage flowing into the first sedimentation basin 1 and the amount of sewage bypassed into the anoxic tank 5 are adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is not affected and the anaerobic tank is not affected. 5 can be adjusted. In addition, this Embodiment 24
According to 7, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the first sedimentation basin 1, so that the amount of organic matter supplied to the anoxic tank 5 is not affected and the anaerobic tank is not affected. The effect that the amount of inflow sewage into 4 can be adjusted is obtained. Further, according to this embodiment 247, a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1090] In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the effluent. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 248. FIG. 248 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 248 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the effluent as a means for detecting the amount of nitrogen flowing out of the system, and as a means for detecting the amount of phosphorus flowing in from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and configured to control the amount of sewage flowing into the anoxic tank by-pass and the amount of sewage flowing into the first sedimentation basin. Things. In FIG. 248, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the controller 25 and the output value of the controller 128. It is a vessel. Arithmetic unit 200 is connected to signal line 25a via signal line 25b, controller 128 via signal line 128a, and first settling tank inflow pump 14 via signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 12 and 243, and thus detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 2, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, the signal of the value obtained according to the equation (5.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 248, the concentration of the nitrate nitrogen in the discharge water is measured, and the amount of sewage flowing into the anoxic tank 5 by the bypass is adjusted according to the measured value. Since the amount of the organic substance supplied to the oxygen tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of the sewage flowing from outside the system fluctuates is obtained. Further, according to this embodiment 248, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is adjusted in accordance with the measured value, and the amount is adjusted to anaerobic tank 4. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 4, and the amount of phosphorus discharged is adjusted. The effect of reliably reducing the amount of is obtained. In addition, according to this embodiment 248, since the amount of sewage flowing into the sedimentation basin 1 and the amount of sewage flowing into the anoxic tank 5 are adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect that the amount of sewage flowing into the anoxic tank 5 by bypass can be adjusted without giving it. Furthermore, according to this embodiment 248, the amount of sewage flowing into anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into sedimentation basin 1 first, so that the amount of organic matter supplied to anaerobic tank 5 is affected. The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted without giving it is obtained.
Further, according to this embodiment 248, since a part of the sewage flowing out of sedimentation basin 1 initially flows into bypass tank 5, the SS component is small in the bypass flow to oxygen free tank 5, and the SS component is small. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the concentration of nitrate nitrogen in the discharge water. However, the apparatus may be configured to measure the total nitrogen concentration. Good. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 249. Embodiment 249. FIG. 249 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 249 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. It is what constituted. In FIG. 249, an operation 200 outputs to the first sedimentation basin inflow pump 14 a signal for setting the amount of sewage flowing into the first sedimentation basin 1 to a predetermined value according to the output value of the controller 26 and the output value of the controller 128. It is a vessel. Arithmetic unit 20
0 is the signal line 26a via the signal line 26b and the signal line 1
A controller 128 is connected via 28a and the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 243, and a detailed description thereof will be omitted.

Next, the operation will be described. Embodiment 1
As in the case of 4, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (6.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 249, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the total nitrogen concentration of the discharged water is determined according to a difference from a predetermined target value of the total nitrogen concentration of the discharged water. By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass,
Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 249, the concentration of phosphoric acid and phosphorus in sewage flowing into biological reaction tank 2 is measured, and the amount of sewage flowing into sedimentation basin 1 is first adjusted according to the measured value, and the amount is adjusted to anaerobic tank 4. Anaerobic tank 4
Since the amount of organic matter supplied to the system is adjusted and the amount of phosphorus discharged is adjusted, the effect of reliably reducing the amount of phosphorus flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. According to the embodiment 249, the amount of sewage flowing into the first settling basin 1 is adjusted and the anaerobic tank 5
Since the amount of sewage flowing into the anaerobic tank 4 is controlled, the amount of sewage flowing into the anoxic tank 5 can be adjusted without affecting the amount of organic matter supplied to the anaerobic tank 4. Furthermore, according to this embodiment 249, the anaerobic tank 4 is controlled by adjusting the amount of sewage flowing into the first settling tank 1.
Since the amount of sewage flowing into the anaerobic tank 4 is adjusted, the amount of sewage flowing into the anaerobic tank 4 can be adjusted without affecting the amount of organic substances supplied to the anoxic tank 5. According to this embodiment 249, part of the sewage flowing out of sedimentation basin 1 flows into bypass tank 5 by bypass. The effect of reducing the load on the sink-anoxic tank bypass inflow pump 11 is obtained.

[1098] In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the sewage flowing into the biological reaction tank 2. An apparatus may be configured. Further, in the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

[1099] Embodiment 250 FIG. 250 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 250 of the present invention. This embodiment includes a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into a biological reaction tank as a means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. It is what constituted. In FIG. 250, an operation 200 outputs to the first settling tank inflow pump 14 a signal for setting the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the output value of the controller 27 and the output value of the controller 128. It is a vessel. Arithmetic unit 20
0 is the signal line 27a via the signal line 27b and the signal line 1
A controller 128 is connected via 28a and the first settling tank inflow pump 14 via a signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 16 and 243, and a detailed description thereof will be omitted.

[1100] Next, the operation will be described. Embodiment 1
As in the case of 6, the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted. That is, a signal of a value obtained according to the equation (7.1) is output to the initial sink-anoxic tank bypass inflow pump 11. Also, as in the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, (2
A signal having a value obtained according to the same equation as the equation 4.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 250, the total nitrogen concentration of sewage flowing into biological reaction tank 2 is measured, and the amount of sewage bypassed into anoxic tank 5 is determined according to the measured value. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount, the effect of reliably reducing the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates is obtained. . In addition, this Embodiment 25
According to 0, the concentration of phosphoric acid and phosphorus in the sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the sedimentation basin 1 is adjusted in accordance with the measured value, and the amount of sewage flowing into the anaerobic tank 4 is adjusted. The amount of organic substances supplied to the anaerobic tank 4 is adjusted by controlling the amount of phosphorus discharged, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system is reliably reduced. The effect that can be obtained is obtained. Also, the second embodiment
According to No. 50, the amount of sewage flowing into the first sedimentation basin 1 is adjusted, and the amount of sewage flowing into the anoxic tank 5 is adjusted. The effect that the amount of sewage bypassed into the tank 5 can be adjusted is obtained. Furthermore, the second embodiment
According to 50, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the sedimentation basin 1 first, so that the amount of organic matter supplied to the anoxic tank 5 is not affected.
The effect that the amount of sewage flowing into the anaerobic tank 4 can be adjusted is obtained. Further, according to this embodiment 250, since a part of the sewage flowing out of sedimentation basin 1 first flows into bypass tank 5 by bypass, SS flows during the bypass flow to oxygen free tank 5.
Low in component, primary sedimentation-anoxic tank bypass inflow pump 11
Thus, the effect of reducing the load on the device can be obtained.

[1102] In this embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the concentration of nitrate nitrogen in the sewage flowing into the biological reaction tank 2. However, the amount of nitrogen in ammonia is measured. The device may be configured at the same time. Also,
In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. Is also good.

Embodiment 251. FIG. 251 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 251 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, in the present embodiment, the apparatus is configured to correct the output value to the initial settling-anoxic tank bypass inflow pump according to the changing tendency of the amount of sewage flowing into the biological reaction tank. In FIG. 251, reference numeral 43 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the sewage in the mixed solution in the oxygen-free tank 5, reference numeral 31 denotes a setter for setting a target value of the concentration of nitrate nitrogen, and reference numeral 21 denotes nitrate. Measurement value of nitrogen concentration meter 43 and setting device 31
A controller for outputting a signal for setting the amount of sewage sewage into the anoxic tank 5 to a predetermined value in accordance with the difference from the target value set in the first settling / anaerobic tank bypass inflow pump 11. A flow meter (correction means) 111 for measuring the amount of sewage flowing into the tank 2 corrects an output value to the initial sink-anoxic tank bypass inflow pump 11 according to a change tendency of the amount of sewage flowing into the biological reaction tank 2. (Correction means). The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5, and the flow meter 101 is provided in the pipe b. The controller 21 includes a signal line 43a.
Is connected to the nitrate nitrogen concentration meter 43 via the signal line 31a and the setting device 31 via the signal line 31a. The compensator 111 is connected to the flow meter 101 via a signal line 101a, the controller 21 via a signal line 21a, and the primary sink / anoxic tank bypass inflow pump 11 via a signal line 111a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
To the compensator 111 via The amount of sewage flowing into the biological reaction tank 2 is measured by the flow meter 101, and the measured value is transmitted to the corrector 111 via the signal line 101a.

[1105] The corrector 111 uses the correction value obtained, for example, in accordance with the following equation (25.1) in accordance with the tendency of the amount of sewage flowing into the biological reaction tank 2 to change the bypass flow into the anoxic tank 5. A signal corrected so that the amount of sewage is set to a value obtained according to, for example, equation (25.2) is output. _{H0 = H 0 + K hosei1 (} Q in -Q in-1) (25.1) where, H0: correction value H _0: Constant _K hosei1: constant Q _in: inflow sewage quantity Q to the current bioreactor 2 _{in -1} : the amount of sewage flowing into the biological reaction tank 2 before one step Q _{ano_H} = Q _ano × H0 (25.2) where Q _{ano_H} : the amount of sewage flowing into the anoxic tank 5 after correction Q _ano : The amount of sewage that flows into the anoxic tank 5 before the correction before the correction The output of the corrector 111 is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via the signal line 111a.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the amount of sewage flowing into the biological reaction tank 2 increases, the oxygen-free tank 5
It changes in the direction in which the amount of sewage flowing into the bypass increases, and changes in the direction in which the amount of organic matter supplied to the anoxic tank 5 increases. Conversely, when the amount of sewage flowing into the biological reaction tank 2 decreases, the amount of sewage bypassed into the anoxic tank 5 changes in a direction to decrease,
The amount of the organic substance supplied to the anoxic tank 5 changes in a decreasing direction.

[1107] As described above, according to the embodiment 251, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. According to this embodiment 251, the amount of sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the biological reaction tank 2 is measured according to the tendency of the change in the amount of sewage flowing into the biological reaction tank 2 to the initial sink-anoxic tank bypass inflow pump 11. The amount of organic matter supplied to the anaerobic tank 5 is adjusted by correcting the output value of the sewage and adjusting the amount of sewage flowing into the anaerobic tank 5 by bypass. Therefore, when the flow rate of the sewage flowing from outside the system changes, the organic matter is removed. The effect of being able to supply the oxygen-free tank 5 quickly and accurately is obtained.

[1108] In this embodiment, the correction value is obtained according to the change tendency of the amount of sewage flowing into the biological reaction tank 2. However, the change tendency of the oxidation-reduction potential of the mixed solution in the anaerobic tank 4 and the dissolved oxygen When a correction value is obtained according to plant data such as a change tendency of the value, a change tendency of the MLSS value, a change tendency of the oxidation-reduction potential of the mixed solution in the anoxic tank 5, a change tendency of the dissolved oxygen value, a MLSS value The same effect can be obtained even when the correction value is obtained in accordance with the plant data such as the tendency of change. Further, in the present embodiment, the output value to the initial settling-anoxic tank bypass inflow pump 11 is corrected, but the inflow pump, the inflow-anoxic tank bypass inflow pump shown in the other embodiments described above, Similar effects can be obtained even when the output value to the settling tank inflow pump and the inflow-anaerobic tank bypass inflow pump is corrected.

[1109] Embodiment 252. FIG. 252 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 252 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the concentration of nitrate nitrogen in the sewage in the mixture in the anoxic tank as a means for detecting the amount of denitrification, and measures the amount of sewage that flows into the anoxic tank by bypass. The device is configured to adjust. Further, in the present embodiment, the apparatus is configured to correct the output value to the primary sedimentation-anoxic tank bypass inflow pump according to the change tendency of the total nitrogen amount flowing into the biological reaction tank. In FIG. 252, reference numeral 43 denotes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in sewage in the mixed solution in the oxygen-free tank 5, reference numeral 31 denotes a setter for setting a target value of the concentration of nitrate nitrogen, and reference numeral 21 denotes nitrate. Measurement value of nitrogen concentration meter 43 and setting device 3
A controller for outputting a signal for setting the amount of sewage by-pass into the anoxic tank 5 to a predetermined value according to a difference from the target value set to 1 to the initial sink-anoxic tank bypass inflow pump 11; A flow meter (correction means) for measuring the amount of sewage flowing into the reaction tank 2, 61 is a total nitrogen concentration meter (correction means) for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2, 83 is a unit per unit time An arithmetic unit (correction means) 112 for calculating the total nitrogen amount flowing into the biological reaction tank 2 is provided to the primary sedimentation-oxygen tank bypass inflow pump 11 in accordance with the changing tendency of the total nitrogen amount flowing into the biological reaction tank 2. It is a corrector (correction means) for correcting the output value. The nitrate nitrogen concentration meter 43 is provided in the oxygen-free tank 5, and the flow meter 101 and the total nitrogen concentration meter 61 are provided in the pipe b. The controller 21 includes a nitrate nitrogen concentration meter 43 via a signal line 43a and a setting device 31 via a signal line 31a.
Is connected to The calculator 83 is connected to the flow meter 101 via the signal line 101a and to the total nitrogen concentration meter 61 via the signal line 61a. The compensator 112 is connected to the signal line 83
The arithmetic unit 83 is connected via a, the controller 21 via a signal line 21a, and the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 112a. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

Next, the operation will be described. The nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank 5 is measured by a nitrate nitrogen concentration meter 43, and the measured value is transmitted to the controller 21 via a signal line 43a. Further, the target value set in the setting device 31 is transmitted to the controller 21 via the signal line 31a. The controller 21 sets the amount of sewage that flows into the anoxic tank 5 by bypass in accordance with the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value, for example, according to equation (1.1). Output a signal. The output of the controller 21 is a signal line 21a.
To the corrector 112 via The amount of sewage flowing into the biological reaction tank 2 is measured by the flow meter 101, and the measured value is transmitted to the calculator 83 via the signal line 101a. The total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured by a total nitrogen concentration meter 61.
, And the measured value is calculated by the arithmetic unit 83 via the signal line 61a.
Conveyed to. The arithmetic unit 83 is configured, for example, by the following (26.
The amount of total nitrogen flowing into the biological reaction tank 2 per unit time is calculated according to the equation (1). N _in = Q _in × C _{TN_in} (26.1) where, N _in : total amount of nitrogen flowing into biological reaction tank 2 per unit time Q _in : flow rate of sewage flowing into biological reaction tank 2 C _{TN_in} : organism The total nitrogen concentration in the sewage flowing into the reaction tank 2 is output from the compensator 11 via a signal line 83a.
It is conveyed to 2.

[1111] The compensator 83 is provided, for example, in the following (26.2) according to the change tendency of the total nitrogen amount flowing into the biological reaction tank 2.
Using the correction value obtained according to the equation, a signal is output so that the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted to a value obtained according to, for example, equation (26.3). _{H0 = H 0 + K hosei2 (} N in -N in-1) (26.2) where, H0: correction value H _0: Constant _K hosei2: constant N _in: total amount of nitrogen flowing into the current bioreactor 2 N _in-1: 1 step prior to the biological reactor 2 the total nitrogen content _{Q ano_H = Q ano × H0 (} 26.3) flows into _here, Q ano_H: bypass inlet sewage quantity to anoxic tank 5 after the correction _Qano : the amount of sewage that flows into the anoxic tank 5 before the correction before the correction. The output of the corrector 111 is transmitted to the initial sink-anoxic tank bypass inflow pump 11 via the signal line 112a.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass increases, and the amount of organic matter supplied to the anoxic tank 5 increases.
As a result, the denitrification reaction becomes active, and the nitrogen removal amount increases. Conversely, if the measured value of the nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 by bypass decreases,
The amount of organic matter supplied to the anoxic tank 5 decreases. As a result, the denitrification reaction becomes inactive and the nitrogen removal amount decreases. Also,
If the amount of total nitrogen flowing into the biological reaction tank 2 increases, the amount of sewage bypassed into the anoxic tank 5 changes in a direction to increase,
The amount of organic matter supplied to the oxygen-free tank 5 changes in a direction to increase. Conversely, when the total nitrogen amount flowing into the biological reaction tank 2 decreases, the amount of sewage bypassed into the oxygen-free tank 5 changes in a direction to decrease, and the amount of organic matter supplied to the oxygen-free tank 5 decreases. Change.

As described above, according to this embodiment 252, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free concentration is determined according to a difference from a predetermined target value. Tank 5
By adjusting the amount of organic matter supplied to the anoxic tank 5 by adjusting the amount of sewage that flows into the bypass, the amount of nitrogen that flows out of the system is ensured even if the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be reduced is obtained. Further, according to this embodiment 252, the flow rate of sewage flowing into biological reaction tank 2 and the total nitrogen concentration are measured, and the initial sedimentation-anoxic The output value to the tank bypass inflow pump 11 is corrected, and the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 by bypass. When the concentration fluctuates, an effect of quickly and accurately supplying organic substances to the oxygen-free tank 5 can be obtained.

In this embodiment, the flow meter 101 is arranged on the upstream side, and the total nitrogen concentration meter 61 is arranged on the downstream side. However, the same effect can be obtained even if the arrangement is reversed. Further, in the present embodiment, the flow meter 101 is installed in the pipe b, but the same effect can be obtained when the flow meter 101 is installed in the pipe d. Also,
In the present embodiment, the total nitrogen concentration meter 61 is installed in the pipe b. However, the same effect can be obtained when the total nitrogen concentration meter 61 is installed in the pipe a. Further, in the present embodiment, the output value to the initial settling-anoxic tank bypass inflow pump 11 is corrected, but the inflow pump, the inflow-anoxic tank bypass inflow pump shown in the other embodiments described above, Similar effects can be obtained even when the output value to the settling tank inflow pump and the inflow-anaerobic tank bypass inflow pump is corrected.

[1115] Embodiment 253. Embodiment 1 described above
In one embodiment of the embodiment 252, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is adjusted in order to adjust the amount of sewage flowing into the anoxic tank 5, the anaerobic tank 4, and the first sedimentation basin 1. Although the case where the concentration of phosphorus or the concentration of ammoniacal nitrogen is used or the case where the concentration of phosphoric acid phosphorus or the concentration of total phosphorus flowing into the biological reaction tank 2 is used has been described, the amount of nitrogen or phosphorus flowing into the biological reaction tank 2 per unit time is described. The same effect can be obtained even when the flow rate of sewage flowing into the anoxic tank 5, the anaerobic tank 4, or the first sedimentation basin 1 is adjusted using

FIG. 253 is a configuration diagram showing a control device of the biological water treatment apparatus according to the embodiment 253 of the present invention. FIG. 253 is an example in which the amount of sewage flowing into the anoxic tank 5, the anaerobic tank 4, and the first sedimentation tank 1 is adjusted using the amount of nitrogen or phosphorus flowing into the biological reaction tank 2 per unit time. 15 shows a modification of the fourteenth embodiment. FIG. 253
In the figure, 101 is a flow meter (inflow nitrogen amount detecting means) for measuring the amount of sewage flowing into the biological reaction tank 2, and 61 is a total nitrogen concentration meter (flowing nitrogen) for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2. Means 83 for calculating the total amount of nitrogen flowing into the biological reaction tank 2 per unit time (inflow nitrogen amount detecting means), and 231 a target for the total amount of nitrogen flowing out of the system per unit time. The setter 221 for setting the value initially outputs a signal for setting the amount of sewage bypassed into the anoxic tank 5 to a predetermined value according to the difference between the calculated value of the calculator 83 and the target value set in the setter 231. Sink-anoxic tank bypass inflow pump 11
(An anoxic tank inflow water amount adjustment signal output means). The flow meter 101 and the total nitrogen concentration meter 61 are provided on the pipe b. The calculator 83 is connected to the flow meter 101 via the signal line 101a and to the total nitrogen concentration meter 61 via the signal line 61a. The controller 221 is connected to the signal line 8.
The arithmetic unit 83 is connected via 3a, the setting unit 231 via a signal line 231a, and the primary sedimentation-free oxygen tank bypass inflow pump 11 via a signal line 221a. The other components are the same as or equivalent to those shown in FIG. 14 with the same reference numerals, and a detailed description thereof will be omitted.

[1117] Embodiment 254. Embodiment 1 described above
In one embodiment of the embodiment 252, in order to adjust the amount of sewage flowing into the anoxic tank 5, the anaerobic tank 4, and the first sedimentation basin 1, the nitrate nitrogen concentration and the total nitrogen concentration of the discharge water are adjusted. The case of using or the concentration of phosphoric acid or total phosphorus in the effluent was explained. However, the amount of nitrogen or phosphorus flowing out of the system per unit time was used to determine the oxygen-free tank 5, anaerobic tank 4, Similar effects can be obtained even when the amount of sewage flowing into the pond 1 is adjusted.

FIG. 254 is a block diagram showing a control device of the biological water treatment apparatus according to the embodiment 254 of the present invention. FIG. 254 shows an embodiment in which the amount of sewage flowing into the anoxic tank 5, the anaerobic tank 4, and the first sedimentation basin 1 is adjusted by using the amount of nitrogen or phosphorus flowing out of the system per unit time. 10 shows a modification of FIG. In FIG. 254, reference numeral 106 denotes a flow meter (outflow nitrogen amount detecting means) for measuring the flow rate of effluent, 46 denotes a nitrate nitrogen concentration meter (outflow nitrogen amount detecting means) for measuring the nitrate nitrogen concentration of effluent, and 85 denotes An arithmetic unit (outflow nitrogen amount detection means) for calculating the amount of nitrate nitrogen flowing out of the system per unit time, 232 is a setter for setting a target value of the amount of nitrate nitrogen, 222 is the calculated value of the arithmetic unit 85 and A controller that outputs a signal for setting the amount of sewage bypassed into the anoxic tank 5 to a predetermined value in accordance with the difference from the target value set in the setter 232 to the initial sink-anoxic tank bypass inflow pump 11 ( Oxygen tank inflow water amount adjustment signal output means). The flow meter 106 and the nitrate nitrogen concentration meter 46 are provided on the pipe d. The arithmetic unit 85 is connected to the flow meter 106 via the signal line 106a and the nitrate nitrogen concentration meter 4 via the signal line 46a.
6 is connected. The adjuster 222 includes an arithmetic unit 85 via a signal line 85a and a setting unit 2 via a signal line 232a.
32, and is connected to the initial sink-anoxic tank bypass inflow pump 11 via a signal line 222a. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and a detailed description thereof will be omitted.

[1119] Embodiment 255. Embodiment 1 described above
In one embodiment of the embodiment 254, the amount of nitrogen or phosphorus flowing out of the system is determined by determining the concentration of nitrate nitrogen or total nitrogen in the effluent or the concentration of phosphoric acid or total phosphorus in the effluent. Although the case where the detection is performed by measuring the concentration has been described, the same effect can be obtained even when the detection is performed by measuring the nitrogen concentration or the phosphorus concentration of the sewage in the mixed solution at the end of the aerobic tank 6.

[1120] FIG. 255 is a configuration diagram showing a control device of a biological water treatment apparatus according to an embodiment 255 of the present invention. FIG. 255 shows an embodiment in which the amount of nitrogen or phosphorus flowing out of the system is detected by measuring the concentration of nitrogen or phosphorus in the sewage in the mixture at the end of the aerobic tank 6. 10 shows a modification of FIG. In FIG. 255, reference numeral 44 denotes a nitrate nitrogen concentration meter (outflow nitrogen amount detecting means, nitrogen concentration meter) for measuring the concentration of nitrate nitrogen in the sewage in the mixture at the end of the anaerobic tank 6. The nitrate nitrogen concentration meter 44 is provided at the end of the aerobic tank 6. The controller 24 includes a nitrate nitrogen concentration meter 44 via a signal line 44a and a signal line 34a.
Is connected to the setter 34 via the signal line 24a and the primary sedimentation-free oxygen tank bypass inflow pump 11 via the signal line 24a. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and a detailed description thereof will be omitted.

Embodiment 256. Embodiment 1 described above
In one embodiment of the embodiment 254, the amount of nitrogen or phosphorus flowing out of the system is determined by determining the concentration of nitrate nitrogen or total nitrogen in the effluent or the concentration of phosphoric acid or total phosphorus in the effluent. Although the case where the detection is performed by measuring the concentration is described, the same effect can be obtained even when the detection is performed by measuring the nitrogen concentration or the phosphorus concentration of the sewage in the mixed solution flowing out from the biological reaction tank 2. .

FIG. 256 is a block diagram showing a control device of a biological water treatment apparatus according to Embodiment 256 of the present invention. FIG. 256 shows an example in which the amount of nitrogen or phosphorus flowing out of the biological water treatment apparatus is detected by measuring the concentration of nitrogen or phosphorus in the mixed solution flowing out of the biological reaction tank 2. 15 shows a modification of the tenth embodiment. In FIG. 256, reference numeral 45 denotes a nitrate nitrogen concentration meter (outflow nitrogen amount detecting means, nitrogen concentration meter) for measuring the concentration of nitrate nitrogen in the sewage in the mixed solution flowing out of the biological reaction tank 2.
The nitrate nitrogen concentration meter 45 is provided on the pipe c. The controller 24 is connected to a nitrate nitrogen concentration meter 45 via a signal line 45a.
, A setting unit 34 via a signal line 34a, and a signal line 24a.
Is connected to the initial settling-oxygen-free tank bypass inflow pump 11 through the inlet. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and a detailed description thereof will be omitted.

Embodiment 1257. Embodiment 1 described above
In one embodiment of the embodiment 254, the amount of nitrogen or phosphorus flowing out of the system is determined by determining the concentration of nitrate nitrogen or total nitrogen in the effluent or the concentration of phosphoric acid or total phosphorus in the effluent. The case where the detection is performed by measuring the concentration has been described, but the same effect can be obtained even when the detection is performed by measuring the nitrogen concentration or the phosphorus concentration of the supernatant water in the final sedimentation basin 3.

FIG. 257 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 257 of the present invention. FIG. 257 shows an example of detecting the amount of nitrogen or phosphorus flowing out of the system by measuring the nitrogen concentration or phosphorus concentration of the supernatant water in the final sedimentation tank 3.
33 shows a modification of the tenth embodiment. In FIG. 257, reference numeral 47 denotes a nitrate nitrogen concentration meter (outflow nitrogen amount detection means, nitrogen concentration meter) for measuring the concentration of nitrate nitrogen in the supernatant water in the final sedimentation tank 5. The nitrate nitrogen concentration meter 47 is used for the final sedimentation basin 3
It is provided within. The controller 24 is connected to the nitrate nitrogen concentration meter 47 via a signal line 47a, the setting unit 34 via a signal line 34a, and the initial sink-anoxic tank bypass inflow pump 11 via a signal line 24a. I have. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and a detailed description thereof will be omitted.

Embodiment 258. Embodiment 258. Embodiment 1 described above
In one embodiment of the embodiment 254, the amount of nitrogen or phosphorus flowing from the outside of the system is determined by the total nitrogen concentration or the ammonia nitrogen concentration of the sewage flowing into the biological reaction tank 2, or the biological reaction tank 2 Although the case of detecting by measuring the phosphoric acid phosphorus concentration and the total phosphorus concentration of the sewage flowing into the sedimentation tank 1 has been described, the case of detecting by measuring the nitrogen concentration or the phosphorus concentration of the sewage flowing first into the sedimentation basin 1 is described. The same effect can be obtained.

FIG. 258 is a configuration diagram showing a control device of the biological water treatment apparatus according to the embodiment 258 of the present invention. FIG. 258 shows a modification of the twenty-fourth embodiment as an example in which the amount of nitrogen or phosphorus flowing from outside the system is detected by measuring the concentration of nitrogen or phosphorus in sewage flowing into the sedimentation basin 1 first. An example is shown. FIG. 258
In the figure, reference numeral 149 denotes a phosphoric acid phosphorus concentration meter (inflowing phosphorus amount detecting means, phosphorus concentration meter) for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the sedimentation tank 1 first. The phosphoric acid phosphorus concentration meter 149 is provided on the pipe a. The controller 127 includes a phosphoric acid phosphorus concentration meter 149 via a signal line 149a, a setting unit 137 via a signal line 137a, and a signal line 127a.
Is connected to the inflow-anaerobic tank bypass inflow pump 13. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Embodiment 259. Embodiment 259. Embodiment 1 described above
In one embodiment of the embodiment 254, the amount of nitrogen or phosphorus flowing from outside the system is determined by the total nitrogen concentration or ammonia nitrogen concentration of sewage flowing into the biological reaction tank 2 or the concentration of ammoniacal nitrogen. The case of detecting by measuring the phosphoric acid phosphorus concentration and the total phosphorus concentration of the sewage flowing into the anaerobic tank has been described. However, the case of detecting by measuring the nitrogen concentration or the phosphorus concentration of the sewage in the mixed solution at the tip of the anaerobic tank 4 is described. However, the same effect can be obtained.

FIG. 259 is a configuration diagram showing a control device of a biological water treatment apparatus according to an embodiment 259 of the present invention. FIG. 259 shows the twenty-fourth embodiment as an example in which the amount of nitrogen or phosphorus flowing from outside the system is detected by measuring the concentration of nitrogen or phosphorus in the sewage in the mixed solution at the tip of the anaerobic tank 4. Are shown. FIG.
In 9, reference numeral 147 denotes a phosphoric acid phosphorus concentration meter (inflow phosphorus amount detecting means, phosphorus concentration meter) for measuring the concentration of phosphoric acid phosphorus in sewage in the mixed solution at the tip of the anaerobic tank 4. The phosphoric acid phosphorus concentration meter 147 is provided at the tip of the anaerobic tank 4. Controller 1
27 is a phosphoric acid phosphor concentration meter 1 via a signal line 147a.
47, a setting device 137 via a signal line 137a, and an inflow-anaerobic tank bypass inflow pump 1 via a signal line 127a.
3 is connected. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

[1129] Embodiment 260. Embodiment 1 described above
In one embodiment of the embodiment 254, the amount of nitrogen or phosphorus flowing from outside the system is determined by the total nitrogen concentration or ammonia nitrogen concentration of sewage flowing into the biological reaction tank 2 or the concentration of ammoniacal nitrogen. Although the case of detecting by measuring the phosphoric acid phosphorus concentration and the total phosphorus concentration of the sewage flowing into the sewage has been described, the case of first detecting by measuring the nitrogen concentration or the phosphorus concentration of the sewage in the sedimentation basin 1 is described. Has the same effect.

FIG. 260 is a block diagram showing a control device of a biological water treatment apparatus according to Embodiment 260 of the present invention. FIG. 260 shows an embodiment in which the amount of nitrogen or phosphorus flowing into the biological water treatment apparatus is detected by measuring the concentration of nitrogen or phosphorus in sewage in the first sedimentation tank 1. 24 shows a modification of the embodiment 24. In FIG. 260, reference numeral 148 denotes a phosphoric acid phosphorus concentration meter (inflow phosphorus amount detecting means, phosphorus concentration meter) for measuring the concentration of phosphoric acid in sewage in the first settling tank 1. The phosphoric acid phosphorus concentration meter 148 is initially provided in the sedimentation basin 1. Controller 1
27 is a phosphoric acid phosphorus concentration meter 1 via a signal line 148a.
48, a setting device 137 via a signal line 137a, and an inflow-anaerobic tank bypass inflow pump 1 via a signal line 127a.
3 is connected. The other components are the same as or equivalent to those indicated by the same reference numerals in FIG.

Embodiment 261. Embodiment 261. Embodiment 1 described above
In one embodiment of Embodiment 260, the case where the bypass inflow sewage amount into the anoxic tank 5 is adjusted using the initial sink-anoxic tank bypass inflow pump 11 has been described. The same effect can be obtained even if the adjustment is made by adjusting the distance.

FIG. 261 is a configuration diagram showing a control device of the biological water treatment apparatus according to the embodiment 261 of the present invention. FIG. 261 shows a second embodiment as an example in which the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted using a valve.
Are shown. In FIG. 261, reference numeral 16 denotes a primary sink-anoxic tank bypass inflow control valve (anoxic tank inflow water amount adjusting means) provided in the pipe i for adjusting the flow rate of sewage flowing into the anoxic tank 5 by bypass. The other components are the same as or equivalent to those shown in FIG. 2 with the same reference numerals, and a detailed description thereof will be omitted.

[1133] Embodiment 262. Embodiment 1 described above
In one embodiment of Embodiment 260, the case where the bypass inflow sewage amount to the anaerobic tank 5 is adjusted by using the inflow-anoxic tank bypass inflow pump 12 has been described. The same effect can be obtained even when adjusting.

FIG. 262 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 262 of the present invention. FIG. 262 shows Embodiment 1 as an example in which the amount of sewage flowing into the anoxic tank 5 by bypass is adjusted using a valve.
Are shown. In FIG. 262, reference numeral 17 denotes an inflow-anoxic-tank bypass inflow control valve (anoxic-tank inflow water amount adjusting means) provided in the pipe j for adjusting the flow rate of sewage flowing into the anoxic tank 5 by bypass. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and a detailed description thereof will be omitted.

[1135] Embodiment 263. Embodiment 1 described above
In one embodiment of Embodiment 260, a case has been described in which the bypass inflow sewage amount to the anaerobic tank 4 is adjusted using the inflow-anaerobic tank bypass inflow pump 13, but is adjusted using a valve. Even in this case, the same effect can be obtained.

FIG. 263 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 263 of the present invention. FIG. 263 shows the amount of sewage discharged into the anaerobic tank 4 by bypass.
A modification of the seventeenth embodiment is shown as an example of the case where adjustment is performed using a valve. In FIG. 263, reference numeral 18 denotes an inflow-anaerobic tank bypass inflow adjusting valve (anaerobic tank inflow water amount adjusting means) provided in the pipe k for adjusting the flow rate of sewage flowing into the anaerobic tank 4 by bypass. Other components are shown in Figure 1.
7 are the same as or equivalent to those denoted by the same reference numerals, and a detailed description thereof will be omitted.

[1137] Embodiment 264. Embodiment 1 described above
In one of the embodiments 260 to 260, the amount of sewage flowing into the first sedimentation basin 1
Although the description has been given of the case where the adjustment is performed by using the valve 4, the same effect can be obtained even when the adjustment is performed by using the valve.

FIG. 264 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 264 of the present invention. FIG. 264 shows a modification of the thirty-fifth embodiment as an example in which the amount of sewage flowing into the first settling basin 1 is adjusted using a valve. In FIG. 264, 17 is an anoxic tank 5
Pipe j to regulate the flow rate of sewage flowing into the bypass
Inflow-anoxic tank bypass inflow control valve provided in
Reference numeral denotes a first sedimentation tank inflow control valve (first sedimentation tank inflow water amount adjusting means) provided in the pipe a for adjusting the flow rate of sewage flowing into the first sedimentation tank 1. Other components are shown in FIG.
Are the same as or equivalent to those indicated by the same reference numerals, and a detailed description thereof will be omitted.

[1139] Embodiment 265. Embodiment 1 described above
In one embodiment of the embodiment 260, the case where the inflow sewage into the biological water treatment apparatus is adjusted by using the inflow pump 15 has been described. The same effect can be obtained.

[1140] FIG. 265 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 265 of the present invention. FIG. 265 shows Embodiment 1 as an example of a case where the amount of sewage flowing into a biological water treatment apparatus is adjusted using a valve.
07 shows a modified example. In FIG. 265, reference numeral 17 denotes an inflow-oxygen-free tank bypass inflow control valve provided on the pipe j for adjusting the flow rate of sewage flowing into the anoxic tank 5 by bypass, and reference numeral 20 denotes sewage flowing into the biological water treatment apparatus. This is an inflow control valve (first sedimentation tank inflow water amount adjusting means) for adjusting the flow rate of the water. The other components are the same as or equivalent to those denoted by the same reference numerals in FIG. 107, and a detailed description thereof will be omitted.

[1141] In one embodiment of Embodiments 1 to 255 described above, a case where a nitrate nitrogen concentration meter or an oxidation-reduction potentiometer is used as a means for detecting the amount of denitrification has been described. However, it is not limited to these as long as the amount of denitrification can be detected. Further, in one of the first to 255th embodiments described above, the case where a nitrate nitrogen concentration meter or a total nitrogen concentration meter is used as a means for detecting the amount of nitrogen has been described. However, the present invention is not limited to these as long as the amount can be detected. Further, in one embodiment among the above-described first to 255th embodiments, a case where a phosphoric acid phosphorus concentration meter, an oxidation-reduction potentiometer, or a phosphorus accumulation amount measuring device is used as a means for detecting a phosphorus discharge amount. However, the present invention is not limited to these as long as the amount of discharged phosphorus can be detected. Further, in one of the above-described first to 255th embodiments, a case where a phosphoric acid phosphorus concentration meter or a total phosphorus concentration meter is used as a means for detecting the amount of phosphorus has been described. However, the present invention is not limited to these as long as the amount can be detected. In the above-described embodiment 252, the flowmeter is provided to measure the flow rate of the sewage flowing into the biological reaction tank and the flow rate of the discharged water. If the fluctuation of the flow rate is small, this may be omitted and the apparatus may be configured to set a predetermined flow rate. Further, in each of the above-described embodiments, a time-continuous analog type is used, but a similar effect can be obtained by using a time-discontinuous analog type (sample value type) or digital type. Further, in each of the above-described embodiments, the control circuit configuration has been described. However, the same effect can be obtained even if the control circuit configuration is programmed in a computer and implemented. In each of the embodiments described above, the control circuit is configured as a closed loop, but may be configured as a driving support system that presents a control target value to an operator.

[1142]

As described above, according to the present invention, the denitrification amount detection means for detecting the denitrification amount, and the denitrification target value setting means for setting the target value of the output value of the denitrification amount detection means Anoxic which outputs a signal for setting the amount of water to be treated to be bypassed into the anoxic tank according to the difference between the output value of the denitrification amount detection means and the target value set by the denitrification target value setting means. A biological system comprising a tank inflow water amount control signal output means, and an anoxic tank inflow water amount adjustment means for adjusting the amount of water to be treated to be bypassed into the anoxic tank according to the output value of the anoxic tank inflow water adjustment signal output means. Since the control device of the chemical water treatment device is configured, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the system can be reliably reduced.

According to the present invention, the outflow nitrogen amount detection means for detecting the amount of nitrogen flowing out of the system, and the amount of water to be treated to be bypassed into the anoxic tank are determined according to the output value of the outflow nitrogen amount detection means. Anoxic tank inflow water control signal output means for outputting a signal as a value, and an anoxic tank inflow for adjusting the amount of water to be treated to be bypassed into the anoxic tank according to the output value of the anoxic tank inflow water control signal output means. Since the control device of the biological water treatment apparatus is configured to include the water amount adjusting means, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. effective.

According to the present invention, the inflow nitrogen amount detecting means for detecting the amount of nitrogen flowing from outside the system, and the amount of water to be treated to be bypassed into the anoxic tank are determined in accordance with the output value of the inflow nitrogen amount detection means. Anoxic tank inflow water control signal output means for outputting a signal as a value, and an anoxic tank inflow for adjusting the amount of water to be treated to be bypassed into the anoxic tank according to the output value of the anoxic tank inflow water control signal output means. Since the control device of the biological water treatment apparatus is configured to include the water amount adjusting means, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. effective.

According to the present invention, the phosphorus discharge amount detecting means for detecting the phosphorus discharge amount, the phosphorus discharge target value setting means for setting the target value of the output value of the phosphorus discharge amount detecting means, and the phosphorus discharge amount detecting means Anaerobic tank inflow water amount adjustment signal output means for outputting a signal that sets the predetermined amount of bypass inflow water to be treated to the anaerobic tank in accordance with the difference between the output value and the target value set in the phosphorus discharge target value setting means, Since the control device of the biological water treatment apparatus is configured to include the anaerobic tank inflow water amount adjusting means for adjusting the amount of water to be treated to be bypassed into the anaerobic tank according to the output value of the anaerobic tank inflow water adjustment signal output means. In addition, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced.

According to the present invention, the phosphorus discharge amount detecting means for detecting the phosphorus discharge amount, the phosphorus discharge target value setting means for setting the target value of the output value of the phosphorus discharge amount detecting means, and the phosphorus discharge amount detecting means An anoxic tank inflow water adjustment signal output that outputs a signal for setting the amount of water to be bypassed into the anoxic tank to be treated according to a difference between the output value and the target value set in the phosphorus discharge amount target value setting means. Means, and an oxygen-free tank inflow water amount adjusting means for adjusting the amount of water to be subjected to bypass inflow to the oxygen-free tank according to the output value of the oxygen-free tank inflow water adjustment signal output means. Since the control device is configured, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced and the amount of nitrogen can be reduced.

According to the present invention, the phosphorus discharge amount detecting means for detecting the phosphorus discharge amount, the phosphorus discharge target value setting means for setting the target value of the output value of the phosphorus discharge amount detecting means, and the phosphorus discharge amount detecting means An anaerobic tank inflow water amount control signal output means for outputting a signal for setting the amount of water to be treated flowing into the anaerobic tank to a predetermined value according to a difference between the output value and the target value set in the phosphorus discharge target value setting means; Since the control device of the biological water treatment apparatus is configured to include the first settling basin inflow water amount adjusting means for adjusting the amount of water to be inflowed into the first settling basin according to the output value of the tank inflow water amount adjustment signal output means. In addition, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced.

[1148] According to the present invention, the oxygen-free tank inflow water amount adjustment signal output means for outputting a signal for setting the amount of bypass-inflow-treated water into the oxygen-free tank to a predetermined value, and the phosphorus discharge amount detection for detecting the phosphorus discharge amount Means, a phosphorus discharge target value setting means for setting a target value of the output value of the phosphorus discharge amount detection means, and a difference between the output value of the phosphorus discharge amount detection means and the target value set in the phosphorus discharge target value setting means. An anaerobic tank influent water control signal output means for outputting a signal for setting the amount of water to be treated into the anaerobic tank to a predetermined value, an output value of the anaerobic tank inflow water control signal output means, and an anaerobic tank inflow water control signal output A first settling tank inflow water control signal output means for outputting a signal for setting the amount of water to be treated into the first settling tank to a predetermined value according to an output value of the means, and an output value of the first settling tank inflow water control signal output means. Inflow into the first settling basin accordingly The control device of the biological water treatment system is configured to have a means for adjusting the amount of influent water at the first settling basin that regulates the amount of treated water, so even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it will flow out of the system This has the effect of reliably reducing the amount of phosphorus to be produced. Further, there is an effect that the amount of sewage flowing into the anaerobic tank can be adjusted without affecting the amount of organic substances supplied to the anoxic tank.

According to the present invention, the outflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing out of the system, and the amount of water to be treated to be bypassed into the anaerobic tank is set to a predetermined value according to the output value of the outflowing phosphorus amount detecting means. An anaerobic tank inflow water control signal output means for outputting a signal to be output, and an anaerobic tank inflow water control means for adjusting the amount of water to be treated to be bypassed into the anaerobic tank in accordance with the output value of the anaerobic tank inflow water control signal output means. Since the control device of the biological water treatment apparatus is configured so as to be provided, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced.

[1150] According to the present invention, the outflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing out of the system, and the amount of water to be treated to be bypassed into the anoxic tank is determined in accordance with the output value of the outflowing phosphorus amount detecting means. Anoxic tank inflow water control signal output means for outputting a signal as a value, and an anoxic tank inflow into the anoxic tank in accordance with the output value of the anoxic tank inflow water control signal output means for adjusting the amount of water to be treated. Since the control device of the biological water treatment apparatus is configured to include the water amount adjusting means, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. In addition, there is an effect that the amount of nitrogen can be reduced.

[1151] According to the present invention, the outflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing out of the system, and the amount of water to be treated flowing into the anaerobic tank is set to a predetermined value in accordance with the output value of the outflowing phosphorus amount detecting means. An anaerobic tank inflow water control signal output means for outputting a signal to perform the first sedimentation tank inflow water control means for adjusting the amount of water to be treated into the first sedimentation tank according to the output value of the anaerobic tank inflow water control signal output means. Since the control device of the biological water treatment apparatus is configured so as to be provided, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced.

[1152] According to the present invention, the oxygen-free tank inflow water adjustment signal output means for outputting a signal for setting the amount of bypass-inflow-treated water to the oxygen-free tank to a predetermined value, and detecting the amount of phosphorus flowing out of the system. An outflowing phosphorus amount detecting means, an anaerobic tank inflowing water amount adjusting signal output means for outputting a signal for setting a predetermined amount of inflowing water to be introduced into the anaerobic tank in accordance with an output value of the outflowing phosphorus amount detecting means, First sedimentation basin inflow water control signal output that outputs a signal that sets the amount of water to be treated into the first sedimentation basin to a predetermined value according to the output value of the water flow control signal output means and the output value of the anaerobic tank inflow water control signal output means Means for controlling the biological water treatment apparatus so as to include means for controlling the amount of water to be treated flowing into the first sedimentation basin according to the output value of the first settling tank inflow water control signal output means. Since the device was configured, There is an effect that can be reliably reduced the amount of phosphorus that the flow rate and density of the sewage flowing into the flowing out of the system even if the change from. Further, there is an effect that the amount of sewage flowing into the anaerobic tank can be adjusted without affecting the amount of organic substances supplied to the anoxic tank.

According to the present invention, the inflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing in from the outside of the system, and the amount of water to be treated to be bypassed into the anaerobic tank according to the output value of the inflowing phosphorus amount detecting means is set to a predetermined value. An anaerobic tank inflow water adjustment signal output means for outputting a signal to be output, and an anaerobic tank inflow water adjustment means for adjusting the amount of water to be treated to be bypassed into the anaerobic tank according to the output value of the anaerobic tank inflow water adjustment signal output means. Since the control device of the biological water treatment apparatus is configured so as to be provided, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced.

[1154] According to the present invention, the inflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing in from outside the system, and the amount of water to be treated to be bypassed into the anoxic tank is determined by the output value of the inflowing phosphorus amount detecting means. Anoxic tank inflow water control signal output means for outputting a signal as a value, and an anoxic tank inflow into the anoxic tank in accordance with the output value of the anoxic tank inflow water control signal output means for adjusting the amount of water to be treated. Since the control device of the biological water treatment apparatus is configured to include the water amount adjusting means, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced. In addition, there is an effect that the amount of nitrogen can be reduced.

According to the present invention, the inflowing phosphorus amount detecting means for detecting the amount of phosphorus flowing in from outside the system, and the amount of water to be treated flowing into the anaerobic tank according to the output value of the inflowing phosphorus amount detecting means is set to a predetermined value. An anaerobic tank inflow water control signal output means for outputting a signal to perform the first sedimentation tank inflow water control means for adjusting the amount of water to be treated into the first sedimentation tank according to the output value of the anaerobic tank inflow water control signal output means. Since the control device of the biological water treatment apparatus is configured so as to be provided, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out of the system can be reliably reduced.

According to the present invention, the oxygen-free tank inflow water adjustment signal output means for outputting a signal for setting the amount of bypass-inflow-treated water into the oxygen-free tank to a predetermined value, and detecting the amount of phosphorus flowing from outside the system. Inflow phosphorus amount detection means, anaerobic tank inflow water amount adjustment signal output means for outputting a signal that sets the amount of water to be treated into the anaerobic tank to a predetermined value according to the output value of the inflow phosphorus amount detection means, First sedimentation basin inflow water control signal output that outputs a signal that sets the amount of water to be treated into the first sedimentation basin to a predetermined value according to the output value of the water flow control signal output means and the output value of the anaerobic tank inflow water control signal output means Means for controlling the biological water treatment apparatus so as to include means for controlling the amount of water to be treated flowing into the first sedimentation basin according to the output value of the first settling tank inflow water control signal output means. Since we configured the device, The effect of flow rate and concentration of the sewage flowing in from the outside can be reliably reduced the amount of phosphorus flowing out of the system even if the varied. Further, there is an effect that the amount of sewage flowing into the anaerobic tank can be adjusted without affecting the amount of organic substances supplied to the anoxic tank.

According to the present invention, the biological means is provided with a correcting means for correcting the output value to the anoxic tank inflow water amount adjusting means, the anaerobic tank inflow water amount adjusting means and the first sedimentation tank inflow water amount adjusting means according to the plant data. Since the control device of the target water treatment apparatus is configured, the effect of quickly and accurately supplying organic matter to the oxygen-free tank or the anaerobic tank when the flow rate of sewage flowing from outside the system fluctuates can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 3 of the present invention.

FIG. 4 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 4 of the present invention.

FIG. 5 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 5 of the present invention.

FIG. 6 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 6 of the present invention.

FIG. 7 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 7 of the present invention.

FIG. 8 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to an eighth embodiment of the present invention.

FIG. 9 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 9 of the present invention.

FIG. 10 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 10 of the present invention.

FIG. 11 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 11 of the present invention.

FIG. 12 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Embodiment 12 of the present invention.

FIG. 13 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 13 of the present invention.

FIG. 14 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 14 of the present invention.

FIG. 15 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 15 of the present invention.

FIG. 16 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 16 of the present invention.

FIG. 17 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 17 of the present invention.

FIG. 18 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 18 of the present invention.

FIG. 19 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 19 of the present invention.

FIG. 20 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 20 of the present invention.

FIG. 21 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 21 of the present invention.

FIG. 22 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 22 of the present invention.

FIG. 23 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 23 of the present invention.

FIG. 24 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 24 of the present invention.

FIG. 25 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 25 of the present invention.

FIG. 26 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 26 of the present invention.

FIG. 27 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 27 of the present invention.

FIG. 28 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 28 of the present invention.

FIG. 29 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 29 of the present invention.

FIG. 30 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 30 of the present invention.

FIG. 31 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 31 of the present invention.

FIG. 32 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 32 of the present invention.

FIG. 33 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 33 of the present invention.

FIG. 34 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 34 of the present invention.

FIG. 35 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 35 of the present invention.

FIG. 36 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 36 of the present invention.

FIG. 37 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 37 of the present invention.

FIG. 38 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 38 of the present invention.

FIG. 39 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 39 of the present invention.

FIG. 40 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 40 of the present invention.

FIG. 41 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 41 of the present invention.

FIG. 42 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 42 of the present invention.

FIG. 43 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 43 of the present invention.

FIG. 44 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 44 of the present invention.

FIG. 45 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 45 of the present invention.

FIG. 46 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 46 of the present invention.

FIG. 47 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 47 of the present invention.

FIG. 48 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 48 of the present invention.

FIG. 49 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 49 of the present invention.

FIG. 50 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 50 of the present invention.

FIG. 51 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 51 of the present invention.

FIG. 52 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 52 of the present invention.

FIG. 53 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 53 of the present invention.

FIG. 54 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 54 of the present invention.

FIG. 55 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 55 of the present invention.

FIG. 56 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 56 of the present invention.

FIG. 57 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 57 of the present invention.

FIG. 58 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 58 of the present invention.

FIG. 59 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 59 of the present invention.

FIG. 60 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 60 of the present invention.

FIG. 61 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 61 of the present invention.

FIG. 62 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 62 of the present invention.

FIG. 63 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 63 of the present invention.

FIG. 64 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 64 of the present invention.

FIG. 65 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 65 of the present invention.

FIG. 66 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 66 of the present invention.

FIG. 67 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 67 of the present invention.

FIG. 68 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 68 of the present invention.

FIG. 69 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 69 of the present invention.

FIG. 70 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 70 of the present invention.

FIG. 71 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 71 of the present invention.

FIG. 72 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 72 of the present invention.

FIG. 73 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 73 of the present invention.

FIG. 74 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 74 of the present invention.

FIG. 75 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 75 of the present invention.

FIG. 76 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 76 of the present invention.

FIG. 77 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 77 of the present invention.

FIG. 78 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 78 of the present invention.

FIG. 79 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 79 of the present invention.

FIG. 80 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 80 of the present invention.

FIG. 81 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 81 of the present invention.

FIG. 82 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 82 of the present invention.

FIG. 83 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 83 of the present invention.

FIG. 84 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 84 of the present invention.

FIG. 85 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 85 of the present invention.

FIG. 86 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 86 of the present invention.

FIG. 87 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 87 of the present invention.

FIG. 88 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 88 of the present invention.

FIG. 89 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 89 of the present invention.

FIG. 90 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 90 of the present invention.

FIG. 91 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 91 of the present invention.

FIG. 92 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 92 of the present invention.

FIG. 93 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 93 of the present invention.

FIG. 94 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 94 of the present invention.

FIG. 95 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 95 of the present invention.

FIG. 96 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 96 of the present invention.

FIG. 97 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 97 of the present invention.

FIG. 98 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 98 of the present invention.

FIG. 99 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 99 of the present invention.

FIG. 100 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 100 of the present invention.

FIG. 101 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 101 of the present invention.

FIG. 102 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 102 of the present invention.

FIG. 103 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 103 of the present invention.

FIG. 104 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 104 of the present invention.

FIG. 105 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 105 of the present invention.

FIG. 106 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 106 of the present invention.

FIG. 107 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 107 of the present invention.

FIG. 108 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 108 of the present invention.

FIG. 109 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 109 of the present invention.

FIG. 110 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 110 of the present invention.

FIG. 111 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 111 of the present invention.

FIG. 112 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 112 of the present invention.

FIG. 113 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 113 of the present invention.

FIG. 114 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 114 of the present invention.

FIG. 115 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 115 of the present invention.

FIG. 116 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 116 of the present invention.

FIG. 117 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 117 of the present invention.

FIG. 118 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 118 of the present invention.

FIG. 119 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 119 of the present invention.

FIG. 120 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 120 of the present invention.

FIG. 121 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 121 of the present invention.

FIG. 122 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 122 of the present invention.

FIG. 123 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 123 of the present invention.

FIG. 124 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 124 of the present invention.

FIG. 125 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 125 of the present invention.

FIG. 126 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 126 of the present invention.

FIG. 127 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 127 of the present invention.

FIG. 128 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 128 of the present invention.

FIG. 129 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 129 of the present invention.

FIG. 130 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 130 of the present invention.

FIG. 131 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 131 of the present invention.

FIG. 132 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 132 of the present invention.

FIG. 133 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 133 of the present invention.

FIG. 134 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 134 of the present invention.

FIG. 135 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 135 of the present invention.

FIG. 136 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 136 of the present invention.

FIG. 137 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 137 of the present invention.

FIG. 138 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 138 of the present invention.

FIG. 139 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 139 of the present invention.

FIG. 140 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 140 of the present invention.

FIG. 141 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 141 of the present invention.

FIG. 142 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 142 of the present invention.

FIG. 143 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 143 of the present invention.

FIG. 144 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 144 of the present invention.

FIG. 145 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 145 of the present invention.

FIG. 146 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 146 of the present invention.

FIG. 147 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 147 of the present invention.

FIG. 148 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 148 of the present invention.

FIG. 149 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 149 of the present invention.

FIG. 150 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 150 of the present invention.

FIG. 151 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 151 of the present invention.

FIG. 152 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 152 of the present invention.

FIG. 153 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 153 of the present invention.

FIG. 154 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 154 of the present invention.

FIG. 155 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 155 of the present invention.

FIG. 156 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 156 of the present invention.

FIG. 157 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 157 of the present invention.

FIG. 158 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 158 of the present invention.

FIG. 159 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 159 of the present invention.

FIG. 160 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 160 of the present invention.

FIG. 161 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 161 of the present invention.

FIG. 162 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 162 of the present invention.

FIG. 163 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 163 of the present invention.

FIG. 164 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 164 of the present invention.

FIG. 165 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 165 of the present invention.

FIG. 166 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 166 of the present invention.

FIG. 167 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 167 of the present invention.

FIG. 168 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 168 of the present invention.

FIG. 169 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 169 of the present invention.

FIG. 170 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 170 of the present invention.

FIG. 171 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 171 of the present invention.

FIG. 172 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 172 of the present invention.

FIG. 173 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 173 of the present invention.

FIG. 174 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 174 of the present invention.

FIG. 175 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 175 of the present invention.

FIG. 176 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 176 of the present invention.

FIG. 177 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 177 of the present invention.

FIG. 178 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 178 of the present invention.

FIG. 179 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 179 of the present invention.

FIG. 180 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 180 of the present invention.

FIG. 181 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 181 of the present invention.

FIG. 182 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 182 of the present invention.

FIG. 183 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 183 of the present invention.

FIG. 184 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 184 of the present invention.

FIG. 185 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 185 of the present invention.

FIG. 186 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 186 of the present invention.

FIG. 187 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 187 of the present invention.

FIG. 188 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 188 of the present invention.

FIG. 189 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 189 of the present invention.

FIG. 190 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 190 of the present invention.

FIG. 191 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 191 of the present invention.

FIG. 192 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 192 of the present invention.

FIG. 193 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 193 of the present invention.

FIG. 194 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 194 of the present invention.

FIG. 195 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 195 of the present invention.

FIG. 196 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 196 of the present invention.

FIG. 197 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 197 of the present invention.

FIG. 198 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 198 of the present invention.

FIG. 199 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 199 of the present invention.

FIG. 200 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 200 of the present invention.

FIG. 201 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 201 of the present invention.

FIG. 202 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 202 of the present invention.

FIG. 203 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 203 of the present invention.

FIG. 204 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 204 of the present invention.

FIG. 205 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 205 of the present invention.

FIG. 206 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 206 of the present invention.

FIG. 207 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 207 of the present invention.

FIG. 208 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 208 of the present invention.

FIG. 209 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 209 of the present invention.

FIG. 210 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 210 of the present invention.

FIG. 211 is a configuration diagram showing a control device of a biological water treatment apparatus according to Embodiment 211 of the present invention.

FIG. 212 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 212 of the present invention.

FIG. 213 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 213 of the present invention.

FIG. 214 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 214 of the present invention.

FIG. 215 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 215 of the present invention.

FIG. 216 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 216 of the present invention.

FIG. 217 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 217 of the present invention.

FIG. 218 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 218 of the present invention.

FIG. 219 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 219 of the present invention.

FIG. 220 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 220 of the present invention.

FIG. 221 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Embodiment 221 of the present invention.

FIG. 222 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 222 of the present invention.

FIG. 223 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 223 of the present invention.

FIG. 224 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 224 of the present invention.

FIG. 225 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 225 of the present invention.

FIG. 226 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 226 of the present invention.

FIG. 227 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 227 of the present invention.

FIG. 228 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 228 of the present invention.

FIG. 229 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 229 of the present invention.

FIG. 230 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 230 of the present invention.

FIG. 231 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 231 of the present invention.

FIG. 232 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 232 of the present invention.

FIG. 233 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 233 of the present invention.

FIG. 234 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 234 of the present invention.

FIG. 235 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 235 of the present invention.

FIG. 236 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 236 of the present invention.

FIG. 237 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 237 of the present invention.

FIG. 238 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 238 of the present invention.

FIG. 239 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 239 of the present invention.

FIG. 240 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 240 of the present invention.

FIG. 241 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 241 of the present invention.

FIG. 242 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 242 of the present invention.

FIG. 243 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 243 of the present invention.

FIG. 244 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 244 of the present invention.

FIG. 245 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 245 of the present invention.

FIG. 246 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 246 of the present invention.

FIG. 247 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 247 of the present invention.

FIG. 248 is a configuration diagram illustrating a control device of the biological water treatment apparatus according to Embodiment 248 of the present invention.

FIG. 249 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 249 of the present invention.

FIG. 250 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 250 of the present invention.

FIG. 251 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 251 of the present invention.

FIG. 252 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 252 of the present invention.

FIG. 253 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 253 of the present invention.

FIG. 254 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 254 of the present invention.

FIG. 255 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 255 of the present invention.

FIG. 256 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 256 of the present invention.

FIG. 257 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 257 of the present invention.

FIG. 258 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 258 of the present invention.

FIG. 259 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 259 of the present invention.

FIG. 260 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 260 of the present invention.

FIG. 261 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 261 of the present invention.

FIG. 262 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 262 of the present invention.

FIG. 263 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 263 of the present invention.

FIG. 264 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 264 of the present invention.

FIG. 265 is a configuration diagram showing a control device of the biological water treatment apparatus according to Embodiment 265 of the present invention.

FIG. 266 is a configuration diagram showing a control device of a biological water treatment apparatus according to Conventional Example 1.

FIG. 267 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Conventional Example 2.

FIG. 268 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Conventional Example 3.

FIG. 269 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Conventional Example 4.

FIG. 270 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Conventional Example 5.

FIG. 271 is a configuration diagram illustrating a control device of a biological water treatment apparatus according to Conventional Example 6.

[Explanation of symbols]

1 First settling basin, 2 Biological reaction tank, 3 Final settling basin, 4
Anaerobic tank, 5 anoxic tank, 6 aerobic tank, 11 primary sink-anoxic tank bypass inflow pump (anoxic tank inflow water volume adjustment means), 12 inflow-anoxic tank bypass inflow pump (anaoxic tank inflow water volume adjustment means) ), 13 inflow-anaerobic tank bypass inflow pump (anaerobic tank inflow water amount adjusting means), 14 first sedimentation tank inflow pump (first sedimentation tank inflow water amount adjusting means), 15
Inflow pump (means for adjusting the amount of water flowing into the first settling basin), 16
Primary sedimentation-anoxic tank bypass inflow control valve (anoxic tank inflow water control means), 17 inflow-anoxic tank bypass inflow control valve (anoxic tank inflow water control means), 18 inflow-anaerobic tank bypass inflow Evacuation valve (means for adjusting the amount of inflow water in the anaerobic tank), 19
First settling tank inflow control valve (first settling tank inflow water amount adjusting means), 20 inflow control valve (first settling tank inflow water amount adjusting means), 21, 22, 23, 24, 25, 26, 27, 2
21, 222 regulator (anoxic tank inflow water regulation signal output means), 31, 32, 33 setting device (denitrification target value setting means), 43 nitrate nitrogen concentration meter (denitrification amount detection means, calculation means, estimation Means), 44, 45, 47 nitrate nitrogen concentration meter (outflow nitrogen amount detection means, nitrogen concentration meter), 46 nitrate nitrogen concentration meter (denitrification amount detection means, calculation means, outflow nitrogen amount detection means, nitrogen concentration meter ), 53 oxidation-reduction potentiometer (denitrification amount detection means), 61 total nitrogen concentration meter (inflow nitrogen amount detection means, nitrogen concentration meter, correction means), 71 storage circuit (denitrification amount detection means, estimation means), 81 Arithmetic unit (denitrification amount detection means, arithmetic means), 82 arithmetic unit (denitrification amount detection means, estimation means), 83 arithmetic unit (correction means, inflow nitrogen amount detection means), 85 arithmetic unit (outflow nitrogen amount detection means) ), 101
Flow meter (correction means, inflow nitrogen amount detection means), 106 flow meter (outflow nitrogen amount detection means), 111, 112 Corrector (correction means), 121, 122, 123, 124, 12
5,126,127,128 controller (analysis tank inflow water amount adjustment signal output means), 131,132,133,134
Setter (phosphor discharge target value setting means), 141 Phosphoric acid phosphorus concentration meter (phosphor discharge amount detecting means, calculating means, inflow phosphorus amount detecting means, phosphorus concentration meter), 142 Phosphoric phosphorus concentration meter (phosphor discharge amount detecting means) , Calculation means, estimation means), 1
46 Phosphoric acid concentration meter (outflow phosphorus amount detection means, phosphorus concentration meter), 147,148,149 Phosphoric acid phosphorus concentration meter (inflow phosphorus amount detection means, phosphorus concentration meter), 152 Redox potential meter (phosphor discharge amount detection Means, 162 phosphorus content measuring device (phosphor discharge amount detecting means), 171 storage circuit (phosphor discharge amount detecting means, estimating means), 181 arithmetic unit (phosphor discharge amount detecting means, calculating means), 182 arithmetic unit (phosphorous amount) Discharge amount detecting means, estimating means), 200 arithmetic unit (first sedimentation basin inflow water amount adjustment signal output means).

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Junji Hirotsuji 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 4D028 CB03 CC01 CD01 4D040 BB52 BB72 BB91

Claims (41)

[Claims] 1. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. A denitrification amount detection means for detecting a denitrification amount in the control device of the water treatment device; And denitrification target value setting means for setting a target value of the output value of the quantity detecting means,
A signal for setting a predetermined value for the amount of water to be bypassed into the anoxic tank according to a difference between an output value of the denitrification amount detection means and a target value set in the denitrification target value setting means is output. Anoxic tank inflow water control signal output means, and anoxic tank inflow water control means for controlling the amount of water to be bypassed into the anoxic tank according to the output value of the anoxic tank inflow water control signal output means. Equipped biological water treatment equipment control device. 2. The denitrification amount detection means includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the water to be treated in the mixed solution in the oxygen-free tank. Of biological water treatment equipment. 3. The organism according to claim 1, wherein the denitrification amount detection means comprises an oxidation-reduction potentiometer for measuring the oxidation-reduction potential of the water to be treated in the mixture in the oxygen-free tank. Control device for chemical water treatment equipment. 4. A denitrification amount detecting means for calculating a difference between a concentration of nitrate nitrogen in the water to be treated in the mixture in the oxygen-free tank and a concentration of nitrate nitrogen in the water to be treated after the activated sludge treatment. The control device for a biological water treatment apparatus according to claim 1, further comprising means. 5. The arithmetic means comprises: a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the water to be treated in the mixture in the oxygen-free tank; and a nitrate nitrogen concentration in the water to be treated after the activated sludge treatment. The control device for a biological water treatment apparatus according to claim 4, further comprising a nitrate nitrogen concentration meter for measuring. 6. The biological apparatus according to claim 1, wherein the denitrification amount detecting means includes an estimating means for estimating a nitrate nitrogen concentration of the water to be treated in the mixture in the oxygen-free tank. Control device for a water treatment system. 7. The biology according to claim 6, wherein the estimating means includes a nitrate nitrogen concentration meter for measuring the concentration of nitrate nitrogen in the water to be treated in the mixture in the oxygen-free tank. Control device for a water treatment system. 8. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank, and an aerobic tank, and a final sedimentation basin, and water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. The amount of nitrogen that flows out of the control system of the target water treatment system to detect the amount of nitrogen that flows out of the system A means for informing an anoxic tank inflow amount control signal output means for outputting a signal for setting the amount of water to be bypassed to the anoxic tank to a predetermined value in accordance with an output value of the outflow nitrogen amount detecting means; A control device for a biological water treatment apparatus, comprising: an oxygen-free tank inflow water amount adjusting means for adjusting an amount of water to be bypassed into the anoxic tank according to an output value of an oxygen tank inflow water adjustment signal output means. 9. An anoxic tank inflow water amount adjustment signal output means,
9. The biological water treatment apparatus according to claim 8, wherein a signal is output in accordance with a difference between an output value of the outflow nitrogen amount detection means and a target value of the output value of the outflow nitrogen amount detection means. apparatus. 10. The biological water treatment apparatus according to claim 8, wherein the outflow nitrogen amount detecting means includes a nitrogen concentration meter for measuring a nitrogen concentration of the water to be treated after the activated sludge treatment. Control device. 11. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the water treatment system, the inflow nitrogen that detects the amount of nitrogen flowing from outside the system An amount-detecting means, an anoxic tank inflow water amount adjustment signal output means for outputting a signal for setting a predetermined amount of bypass inflow water to be treated to the anoxic tank in accordance with an output value of the inflow nitrogen amount detecting means, A control device for a biological water treatment apparatus, comprising: an anoxic tank inflow water amount adjusting means for adjusting an amount of water to be bypassed into the anoxic tank according to an output value of an anoxic tank inflow water adjustment signal output means. 12. The biological apparatus according to claim 11, wherein the oxygen-free tank inflow water amount adjustment signal output means outputs a signal in accordance with a difference between an output value of the inflow nitrogen amount detection means and a reference value. Control device for a water treatment system. 13. The biological water treatment apparatus according to claim 11, wherein the inflow nitrogen amount detection means includes a nitrogen concentration meter for measuring a nitrogen concentration of the water to be treated before the activated sludge treatment. Control device. 14. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control device of the target water treatment device, the phosphorus discharge amount detecting means for detecting the phosphorus discharge amount A phosphorus discharge target value setting means for setting a target value of an output value of the phosphorus discharge amount detection means, and a difference between an output value of the phosphorus discharge amount detection means and a target value set in the phosphorus discharge target value setting means. An anaerobic tank inflow water control signal output means for outputting a signal that sets the amount of water to be treated to be bypassed into the anaerobic tank to a predetermined value according to the anaerobic tank; and the anaerobic tank according to an output value of the anaerobic tank inflow water control signal output means. A control device for a biological water treatment apparatus comprising: an anaerobic tank inflow water amount adjusting means for adjusting an amount of water to be treated for bypass inflow into the tank. 15. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control device of the target water treatment device, the phosphorus discharge amount detecting means for detecting the phosphorus discharge amount A phosphorus discharge target value setting means for setting a target value of the output value of the phosphorus discharge amount detection means, and a target value set in the phosphorus discharge amount target value setting means and the output value of the phosphorus discharge amount detection means. The output value of the oxygen-free tank inflow water amount control signal output means for outputting a signal for setting the amount of bypass-inflow-treated water to the oxygen-free tank to a predetermined value according to the difference, and the output value of the oxygen-free tank inflow water amount control signal output means A control device for a biological water treatment apparatus, comprising: an anoxic tank inflow water amount adjusting means for adjusting the amount of water to be inflowed into the anoxic tank by bypass in accordance with the amount. 16. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank, and an aerobic tank, and a final sedimentation basin, and water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control device of the target water treatment device, the phosphorus discharge amount detecting means for detecting the phosphorus discharge amount A phosphorus discharge target value setting means for setting a target value of an output value of the phosphorus discharge amount detection means, and a difference between an output value of the phosphorus discharge amount detection means and a target value set in the phosphorus discharge target value setting means. An anaerobic tank inflow water control signal output means for outputting a signal for setting the amount of water to be treated flowing into the anaerobic tank to a predetermined value in response to the first sedimentation according to an output value of the anaerobic tank inflow water control signal output means A control device for a biological water treatment apparatus comprising: a first sedimentation basin inflow water amount adjusting means for adjusting an amount of water to be treated to be introduced into a pond. 17. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control device of the active water treatment device, Oxygen-free tank inflow water amount adjustment signal output means for outputting a signal having a predetermined value, phosphorus discharge amount detection means for detecting phosphorus discharge amount, and phosphorus discharge for setting a target value of the output value of the phosphorus discharge amount detection means A target value setting means, and a predetermined value for an amount of water to be treated flowing into the anaerobic tank according to a difference between an output value of the phosphorus discharge amount detecting means and a target value set in the phosphorus discharge target value setting means. An anaerobic tank inflow water control signal output means for outputting a signal; and an inflow into the first sedimentation basin according to an output value of the anaerobic tank inflow water control signal output means and an output value of the anaerobic tank inflow water control signal output means. A first sedimentation basin inflow water control signal output means for outputting a signal for setting the amount of water to be treated to a predetermined value; Adjusting the first deposit Control device for biological water treatment apparatus provided with an inflow water amount adjusting means. 18. The phosphoric acid discharge amount detecting means includes a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the water to be treated in the mixed solution in the anaerobic tank.
The control device for a biological water treatment apparatus according to any one of claims 1 to 17. 19. The apparatus according to claim 14, wherein the phosphorus discharge amount detecting means includes an oxidation-reduction potentiometer for measuring an oxidation-reduction potential of the water to be treated in the mixed solution in the anaerobic tank. The control device for a biological water treatment apparatus according to any one of the preceding claims. 20. The apparatus according to claim 14, wherein the phosphorus discharge amount detecting means includes a phosphorus content measuring device for measuring the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank. A control device for a biological water treatment apparatus according to any one of claims 17 to 17. 21. An arithmetic unit for calculating a difference between the concentration of phosphoric acid in the water to be treated in the mixed solution in the anaerobic tank and the concentration of phosphoric acid in the water to be treated before the activated sludge treatment. The control device for a biological water treatment apparatus according to any one of claims 14 to 17, further comprising: 22. A calculating means for measuring a concentration of a phosphoric acid phosphorus in the water to be treated in the mixed solution in the anaerobic tank, and a concentration of phosphoric acid in the water to be treated before the activated sludge treatment. 22. The control apparatus for a biological water treatment apparatus according to claim 21, further comprising a phosphoric acid phosphorus concentration meter. 23. The method according to claim 14, wherein the phosphorus discharge amount detecting means includes an estimating means for estimating a phosphoric acid phosphorus concentration of the water to be treated in the mixed solution in the anaerobic tank. A control device for a biological water treatment apparatus according to any one of the preceding claims. 24. The biological apparatus according to claim 23, wherein the estimating means comprises a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid in the water to be treated in the mixture in the anaerobic tank. Control device for water treatment equipment. 25. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the target water treatment unit, the amount of phosphorus flowing out of the system is detected. Detecting means, an anaerobic tank inflow water amount control signal output means for outputting a signal for setting the amount of water to be bypassed into the anaerobic tank to be treated to a predetermined value in accordance with an output value of the outflowing phosphorus amount detecting means, and A control device for a biological water treatment apparatus, comprising: an anaerobic tank inflowing water amount adjusting means for adjusting an amount of water to be subjected to bypass inflow into the anaerobic tank according to an output value of a water amount adjusting signal output means. 26. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the target water treatment unit, the amount of phosphorus flowing out of the system is detected. Detecting means; an anoxic tank inflow water amount control signal output means for outputting a signal for setting the amount of water to be bypassed into the anoxic tank to be treated to a predetermined value in accordance with an output value of the outflowing phosphorus amount detecting means; A control device for a biological water treatment apparatus, comprising: an oxygen-free tank inflow water amount adjusting means for adjusting an amount of water to be bypassed into the anoxic tank according to an output value of an oxygen tank inflow water adjustment signal output means. 27. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank, and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the target water treatment unit, the amount of phosphorus flowing out of the system is detected. Detecting means, an anaerobic tank inflow water amount adjustment signal output means for outputting a signal for setting the amount of water to be treated into the anaerobic tank to be treated to a predetermined value according to an output value of the outflowing phosphorus amount detecting means, and the anaerobic tank inflow water amount A control device for a biological water treatment apparatus comprising: a first sedimentation basin inflow water amount adjusting means for adjusting an amount of water to be inflowed into the first sedimentation basin according to an output value of the control signal output means. 28. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control device of the active water treatment device, An oxygen-free tank inflow water amount control signal output means for outputting a signal having a predetermined value; an outflow phosphorus amount detection means for detecting the amount of phosphorus flowing out of the system; An anaerobic tank inflow water control signal output means for outputting a signal that sets the amount of water to be treated into the anaerobic tank to a predetermined value; an output value of the anaerobic tank inflow water control signal output means and an output of the anaerobic tank inflow water control signal Means for outputting a signal for controlling the amount of water to be treated flowing into the first sedimentation basin to a predetermined value in accordance with the output value of the means; A control device for a biological water treatment apparatus, comprising: a first sedimentation basin inflow water amount adjusting means for adjusting an amount of water to be inflowed into the first sedimentation basin according to a value. 29. The anaerobic tank inflow water amount adjustment signal output means,
A signal is output in accordance with a difference between an output value of the outflowing phosphorus amount detecting means and a target value of an output value of the outflowing phosphorus amount detecting means. A control device for a biological water treatment apparatus according to any one of the preceding claims. 30. An anoxic tank inflow water amount control signal output means outputs a signal according to a difference between an output value of the outflow phosphorus amount detection means and a target value of the output value of the outflow phosphorus amount detection means. 27. The control device for a biological water treatment device according to claim 26. 31. The biological biological system according to claim 29, wherein the outflowing phosphorus amount detecting means comprises a phosphorus concentration meter for measuring the phosphorus concentration of the water to be treated after the activated sludge treatment. Control device for water treatment equipment. 32. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the water treatment system, the inflow that detects the amount of phosphorus flowing in from outside the system An anaerobic tank influent water amount control signal output means for outputting a signal for setting the amount of water to be treated to be bypassed into the anaerobic tank to a predetermined value according to an output value of the inflowing phosphorus amount detecting means; A control device for a biological water treatment apparatus, comprising: an anaerobic tank inflow water amount adjusting means for adjusting an amount of water to be subjected to bypass inflow into the anaerobic tank in accordance with an output value of an inflow water adjustment signal output means. 33. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank, and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the water treatment system, the inflow that detects the amount of phosphorus flowing in from outside the system An anoxic tank inflow water adjustment signal output means for outputting a signal that sets a predetermined value for the amount of water to be bypassed into the anoxic tank according to an output value of the inflow phosphorus amount detecting means; A control device for a biological water treatment apparatus, comprising: an anoxic tank inflow water amount adjusting means for adjusting an amount of water to be bypassed into the anoxic tank according to an output value of an anoxic tank inflow water adjustment signal output means. 34. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank, and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control unit of the water treatment system, the inflow that detects the amount of phosphorus flowing in from outside the system An anaerobic tank inflow water amount control signal output means for outputting a signal for setting the amount of water to be treated flowing into the anaerobic tank to a predetermined value in accordance with an output value of the inflowing phosphorus amount detecting means; A control device for a biological water treatment apparatus comprising: a first sedimentation basin inflow water amount adjusting means for adjusting an amount of water to be inflowed into the first sedimentation basin according to an output value of a water amount adjustment signal output means. 35. A first sedimentation basin, a biological reaction tank having an anaerobic tank, an anoxic tank and an aerobic tank, and a final sedimentation basin, wherein water to be treated flowing from outside the system flows into the first sedimentation basin. The treated water flowing into the first sedimentation basin flows out of the first sedimentation basin, flows into the biological reaction tank and mixes with the activated sludge stored in the biological reaction tank, and the treated water and the activated sludge are mixed. And the mixed solution moves in the order of the anaerobic tank, the anoxic tank, and the aerobic tank, during which the water to be treated is treated with activated sludge, and the mixed solution flowing out of the biological reaction tank is transferred to the final sedimentation tank. The biological fluid is applied to a biological water treatment apparatus in which the activated sludge flows into the final sedimentation basin and is separated into the activated sludge and the water to be treated after the activated sludge treatment. In the control device of the active water treatment device, An oxygen-free tank inflow water amount adjustment signal output means for outputting a signal having a predetermined value; an inflow phosphorus amount detection means for detecting an amount of phosphorus flowing in from outside the system; An anaerobic tank inflow water control signal output means for outputting a signal that sets the amount of water to be treated into the anaerobic tank to a predetermined value; an output value of the anaerobic tank inflow water control signal output means and an output of the anaerobic tank inflow water control signal Means for outputting a signal for controlling the amount of water to be treated flowing into the first sedimentation basin to a predetermined value in accordance with the output value of the means; A control device for a biological water treatment apparatus, comprising: a first sedimentation basin inflow water amount adjusting means for adjusting an amount of water to be inflowed into the first sedimentation basin according to a value. 36. The anaerobic tank inflow water amount adjustment signal output means,
34. A signal output according to a difference between an output value of the inflowing phosphorus amount detecting means and a reference value.
The control device for a biological water treatment apparatus according to any one of claims 4 and 35. 37. The biology according to claim 33, wherein the anoxic tank inflow water amount adjustment signal output means outputs a signal in accordance with a difference between an output value of the inflow phosphorus amount detection means and a reference value. Control device for a water treatment system. 38. The method according to claim 36, wherein the inflowing phosphorus amount detecting means includes a phosphorus concentration meter for measuring a phosphorus concentration of the water to be treated before the activated sludge treatment. A control device for a biological water treatment apparatus according to claim 1. 39. The apparatus according to claim 1, further comprising correction means for correcting an output value to said oxygen-free tank inflow water amount adjusting means in accordance with the plant data. Any one of claim 26 and claim 33
A control device for a biological water treatment apparatus according to claim 1. 40. The apparatus according to claim 14, further comprising a correction unit that corrects an output value to the anaerobic tank inflow water amount adjustment unit according to the plant data. A control device for a biological water treatment apparatus according to claim 1. 41. The apparatus according to claim 16, further comprising correction means for correcting an output value to said first sedimentation tank inflow water amount adjusting means according to the plant data.
7. The control device for a biological water treatment apparatus according to any one of claims 28, 34, and 35.