JP2014147936A - Controller for biological water treatment apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller for a biological water treatment apparatus capable of efficiently executing denitrification and phosphorus purge and of securing favorable water quality.SOLUTION: The provided controller includes: an inflow phosphorus content sensing means for sensing the phosphorus content of a body of treatment target water streaming out of a system into a preliminary sedimentation basin; an oxygen-free tank inflow water volume adjustment signal output means for outputting a signal for setting, at a specified value according with the output value of the inflow phosphorus content sensing means, the inflow volume of bypassing treatment target water flowing out of the preliminary sedimentation basin into an oxygen-free tank by bypassing without passing an anaerobic tank; and an oxygen-free tank inflow water volume adjustment means configured in-between the preliminary sedimentation basin and the oxygen-free tank for adjusting the inflow volume of the bypassing treatment target water flowing into the oxygen-free tank depending on the output value of the oxygen-free tank inflow water volume adjustment signal output means, whereas the oxygen-free tank inflow water volume adjustment signal output means outputs a signal depending on the difference of the output value of the inflow phosphorus content sensing means and a reference value.

Description

  The present invention relates to a control apparatus for a biological water treatment apparatus that removes nitrogen in treated water by biological action of nitrifying bacteria or denitrifying bacteria and removes phosphorus in treated water by biological action of phosphorus accumulating bacteria. It is.

  If nitrogen and phosphorus contained in sewage continue to flow into lakes and bays with strong closures, their concentrations will eventually become excessive, and harmful phytoplankton such as red sea bream and red tide will be generated. This is called the eutrophication phenomenon and has become a serious social problem in recent years.

  As described in Non-Patent Document 1, there is an activated sludge method as a general method for treating municipal sewage and organic wastewater. The activated sludge method oxidizes organic matter, which is the main pollutant component in sewage, by storing a group of microorganisms (activated sludge) with a purification function in a biological reaction tank and aeration while sufficiently mixing and contacting this with sewage. It is a method of disassembling. The mixed solution after the aeration treatment is separated into supernatant water and activated sludge which are sewage after activated sludge treatment in the sedimentation basin, the supernatant water is discharged out of the system, and the concentrated activated sludge is returned to the biological reaction tank again. The

  The activated sludge method is a treatment method whose main purpose is to oxidatively decompose organic matter, and as it is, nitrogen and phosphorus cannot be removed sufficiently. Then, the activated sludge modification method which applied the function of a certain microorganism is developed (refer nonpatent literature 2).

  For example, there is a biological nitrogen phosphorus removal method called anaerobic anaerobic 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”.

  When phosphorus-accumulating bacteria are placed in a state free of oxidizing substances such as oxygen and nitrate nitrogen, so-called anaerobic conditions, the phosphorus-accumulating bacteria expel phosphoric acid phosphorus from the body into the liquid phase. After this state is continued for a certain period of time, when the phosphorus accumulating bacterium is placed in an oxygen-containing state, so-called aerobic state, the phosphorus accumulating bacterium ingests more phosphoric acid phosphorus released into the liquid phase. Therefore, it is possible to reduce the phosphoric acid phosphorus concentration of sewage below the initial concentration by using phosphorus accumulating bacteria, and finally to a concentration close to zero. In general, it is known that as the amount of phosphorus discharged in an anaerobic state increases, the amount of phosphorus intake in an aerobic state also increases.

On the other hand, nitrite bacteria (mainly Nitrosomonas) that are autotrophic bacteria oxidize ammonia nitrogen by the reaction shown in the following formula (1) under aerobic conditions, and nitrifying bacteria (mainly Nitorobacter) that are autotrophic bacteria are In the aerobic state, nitrite nitrogen is oxidized by the reaction shown in the following formula (2).

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

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

  Therefore, nitrogen contained in sewage can be removed by combining the functions of nitrifying bacteria and denitrifying bacteria. It should be noted that if nitrification is sufficiently achieved and denitrification is performed in accordance with the nitrification, the amount of nitrogen removed increases.

  FIG. 266 is a block diagram showing a biological water treatment apparatus of Conventional Example 1 based on the anaerobic anaerobic and aerobic method. FIG. 267 is a block diagram showing a biological water treatment apparatus of Conventional Example 2 based on an anaerobic anaerobic aerobic method. FIG. 268 is a block diagram showing a biological water treatment apparatus of Conventional Example 3 based on the anaerobic anaerobic aerobic method. FIG. 269 is a block diagram showing a biological water treatment apparatus of Conventional Example 4 by an anaerobic anaerobic and aerobic method. FIG. 270 is a block diagram showing a biological water treatment apparatus of Conventional Example 5 based on an anaerobic anaerobic aerobic method. FIG. 271 is a block diagram showing a biological water treatment apparatus of Conventional Example 6 based on the anaerobic anaerobic aerobic method. In FIGS. 266 to 271, 1 is a first sedimentation basin for storing sewage which is treated water flowing from outside the system, and 2 is a biological reaction tank for storing a group of microorganisms (activated sludge) containing phosphorus accumulating bacteria, nitrifying bacteria and denitrifying bacteria. Reference numeral 3 denotes a final sedimentation basin that separates the mixed liquid flowing out from the biological reaction tank 2 into supernatant water and activated sludge which are sewage after activated sludge treatment.

  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, 5 is an anoxic tank in an anoxic state for performing a denitrification reaction by denitrifying bacteria, 6 is an aerobic tank which is in an aerobic state in order to make a phosphorus accumulating bacterium ingest phosphoric acid phosphorus and to perform nitrification reaction by nitrifying bacteria. Reference numeral 7 denotes an aeration apparatus for supplying air to the aerobic tank 6.

  In addition, a is a pipe connected to the first sedimentation basin 1 so that the sewage flowing from outside the system flows into the first sedimentation basin 1, and b is a pipe for flowing the sewage flowing out from the first sedimentation basin 1 into the biological reaction tank 2. The pipe connected to the first sedimentation tank 1 and the anaerobic tank 4, c was connected to the aerobic tank 6 and the final sedimentation tank 3 in order to flow the mixed solution flowing out from the biological reaction tank 2 into the final sedimentation tank 3. A pipe, d is a pipe connected to the final sedimentation basin 3 in order to discharge the supernatant water separated in the final sedimentation basin 3, and e is a mixture liquid in the aerobic tank 6 circulated to the anoxic tank 5. Therefore, a pipe connected to the aerobic tank 6 and the anaerobic tank 5, f is a pipe connected to the bottom of the final sedimentation tank 3 in order to take out the activated sludge separated in the final sedimentation tank 3 from the final sedimentation tank 3 , G is connected to the pipe f and the anaerobic tank 4 to return the activated sludge taken out from the final sedimentation tank 3 to the biological reaction tank 2. Continued by piping, h is connected to the pipe in the pipe f to discharge the excess activated sludge taken from the final settling tank 3 to the outside of the system.

  8 is a circulation pump provided in the pipe e for adjusting the flow rate of the mixed liquid circulating in the oxygen-free tank 5, and 9 is a pipe g for adjusting the flow rate of activated sludge to be returned to the biological reaction tank 2. The return pump 10 provided is a discharge pump provided in the pipe h in order to adjust the flow rate of the activated sludge discharged outside the system.

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 first settling tank 1 into the oxygen-free tank 5, and 11 is nothing. This is a primary sink-anoxic tank bypass inflow pump provided in the pipe i in order to adjust the flow rate of sewage flowing into the oxygen tank 5 by bypass.
In FIG. 267, FIG. 269, and FIG. 270, j is a pipe connected to the pipe a and the oxygen-free tank 5 in order to bypass a part of the sewage flowing from outside the system into the oxygen-free tank 5; This is an inflow-anoxic tank bypass inflow pump provided in the pipe j in order to adjust the flow rate of sewage flowing into the anoxic tank 5 by bypass.
In FIG. 268, k is a pipe connected to the pipe a and the anaerobic tank 4 in order to bypass a part of the sewage flowing from outside the system into the anaerobic tank 4, and 13 is a sewage that bypasses the anaerobic tank 4. This is an inflow-anaerobic tank bypass inflow pump provided in the pipe k in order to adjust the flow rate of.
In FIG. 269 and FIG. 271, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 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 flowing from outside the system flows into the first sedimentation basin 1 through the pipe a and is stored in the first sedimentation basin 1. The sewage that first flows out from the settling basin 1 flows into the biological reaction tank 2 through the pipe b. The sewage flowing into the biological reaction tank 2 is mixed with the activated sludge. The mixed liquid of sewage and activated sludge is a small opening opened in the partition between the anaerobic tank 4 and the anaerobic tank 5 and a small opening opened in the partition between the anaerobic tank 5 and the aerobic tank 6. The anaerobic tank 4, the anaerobic tank 5, and the aerobic tank 6 are moved in this order and flow out of the biological reaction tank 2. Here, a part of the mixed liquid in the aerobic tank 6 is circulated to the anoxic tank 5 through the pipe e by the circulation pump 8. The liquid mixture flowing out from the biological reaction tank 2 flows into the final sedimentation basin 3 through 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 the pipe d, and the activated sludge is taken out from the final sedimentation tank 3 through the pipe f. The activated sludge taken out from the final sedimentation basin 3 is returned to the biological reaction tank 2 by the return pump 9 via the pipe g, but the surplus is discharged outside the system by the discharge pump 10 via the pipe h.

  During the operation described above, the phosphorus accumulating bacteria discharge phosphoric acid phosphorus in the anaerobic tank 4. And if the phosphorus accumulating bacteria which discharged phosphoric acid phosphorus in the anaerobic tank 4 move to the aerobic tank 6, the phosphorus accumulation in the aerobic tank 6 which is in an aerobic state by the oxygen supplied from the aeration tank 7 The bacterium ingests more phosphoric acid phosphorus than the anaerobic tank 4 exhales. The mixed solution containing phosphorus-accumulating bacteria that ingested phosphoric acid phosphorus flows out of the biological reaction tank 2, and a part of the phosphorus-accumulating bacteria ingested phosphoric acid phosphorus is discharged as extra activated sludge to the outside through the pipe h. Is done. Accordingly, phosphorus in the sewage is removed together with excess activated sludge.

  On the other hand, during the operation described above, most of the nitrogen is contained as ammoniacal nitrogen in the sewage flowing from outside the system. Therefore, when the mixed liquid of sewage and activated sludge moves to the aerobic tank 6, it is preferable. In the air tank 6, nitrifying bacteria oxidize ammonia nitrogen to nitrate nitrogen and nitrite nitrogen. When a part of the mixed solution of sewage treated with nitrifying bacteria and activated sludge is circulated to the anoxic tank 5 through the pipe e, the denitrifying bacteria in the anoxic tank 5 are nitrate respiration and nitrite respiration. To reduce nitrate nitrogen and nitrite nitrogen to nitrogen gas by denitrification reaction. Therefore, nitrogen in the sewage is removed as nitrogen gas.

  In addition, although organic substance is required for denitrification reaction, when the organic substance density | concentration in sewage is low, all the organic substance in the sewage which flowed into the anaerobic tank 4 may be consumed in the anaerobic tank 4, and denitrification reaction It may be necessary to supply the amount of organic matter required for the oxygen-free tank 5. For this reason, in the apparatus of Conventional Example 1, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anaerobic tank 5 via the pipe i while the flow rate is adjusted by the primary sedimentation-anoxic tank bypass inflow pump 11. By doing so, the amount of organic matter necessary for the denitrification reaction is supplied to the oxygen-free tank 5. In the apparatus of Conventional Example 2, part of the sewage having a higher organic concentration than flowing in from outside the system is bypassed to the oxygen-free tank 5 via the pipe j while adjusting the flow rate by the inflow-anoxic tank bypass inflow pump 12. By flowing in, the amount of organic matter necessary for the denitrification reaction is supplied to the anoxic tank 5.

  In addition, organic matter is also required for the discharge of phosphorus from the phosphorus accumulating bacteria, and it may be necessary to supply the anaerobic tank 4 with the amount of organic matter necessary for the discharge of phosphorus. For this reason, in the apparatus of Conventional Example 3, a part of the sewage having a higher organic concentration than flowing in from outside the system is bypassed into the anaerobic tank 4 via the pipe k while the flow rate is adjusted by the inflow-anaerobic tank bypass inflow pump 13. By doing so, the amount of organic matter necessary for phosphorus discharge is supplied to the anaerobic tank 4.

  In some cases, it is necessary to supply both the amount of organic matter necessary for the denitrification reaction to the oxygen-free tank 5 and the amount of organic matter necessary for phosphorus discharge to the anaerobic tank 4. For this reason, in the apparatus of Conventional Example 4, a part of the sewage having a higher organic concentration than flowing in from outside the system is supplied to the anaerobic tank 5 through the pipe j while adjusting the flow rate by the inflow-anoxic tank bypass inflow pump 12. The amount of organic matter necessary for denitrification reaction is supplied to the anoxic tank 5 by adjusting the flow rate of the sewage flowing into the first settling basin 1 with the first settling basin inflow pump 14 and necessary for the phosphorus discharge. A small amount of organic matter is supplied to the anaerobic tank 4.

  In the apparatus of Conventional Example 5, a part of the sewage having a higher organic concentration than flowing in from outside the system is bypassed to the oxygen-free tank 5 through the pipe j while adjusting the flow rate by the inflow-anoxic tank bypass inflow pump 12. The inflow pump 15 adjusts the flow rate of the sewage flowing into the biological water treatment apparatus with the inflow pump 15 to supply the amount of organic matter necessary for the denitrification reaction to the oxygen-free tank 5 and the organic matter necessary for discharging the phosphorus. An amount is supplied to the anaerobic tank 4. In the apparatus of Conventional Example 6, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5 through the pipe i while the flow rate is adjusted by the primary sedimentation-anoxic tank bypass inflow pump 11. At the same time, the amount of organic matter necessary for 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 by the first sedimentation basin inflow pump 14, and the amount of organic matter necessary for phosphorus discharge Is supplied to the anaerobic tank 4.

Tetsuo Ide, “Water Treatment Engineering 2nd Edition”, Gihodo Publishing, 1976 Advanced treatment facility design manual (draft), Japan Sewerage Association, 1994

  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 to the biological reaction tank 2. By adjusting the amount of aeration, the amount of activated sludge stored in the biological reaction tank 2, the flow rate of activated sludge to be returned to the biological reaction tank 2, good treatment water quality must be ensured, and the flow rate of inflow sewage due to rainfall, etc. If the properties change significantly, there is a problem that it is difficult to always ensure good water quality only by adjusting the operation amount.

  This invention has been made to solve the above-mentioned problems, except for the operation amount such as the amount of aeration to the biological reaction tank, the amount of activated sludge stored in the biological reaction tank, and the flow rate of activated sludge to be returned to the biological reaction tank. In addition, by appropriately adjusting the flow rate of the sewage flowing into the anaerobic tank or anaerobic tank, it is possible to efficiently perform denitrification and phosphorus discharge, and to ensure good water quality. The object is to obtain a control device.

  The biological water treatment apparatus control device according to the present invention includes an inflowing phosphorus amount detecting means for detecting the amount of phosphorus to be treated flowing from outside the system into the first sedimentation basin, and the first sedimentation basin without using the anaerobic tank. An anaerobic tank inflow water amount adjustment signal output means for outputting a signal for setting the bypass inflow treated water amount to be bypassed into the anoxic tank to a predetermined value according to the output value of the inflow phosphorus amount detection means; An anaerobic tank inflow water amount adjusting means that is provided between the first sedimentation basin and the anoxic tank and adjusts the amount of treated water flowing into the anaerobic tank according to the output value of the anaerobic tank inflow water amount adjustment signal output means; The oxygen-free tank inflow water amount adjustment signal output means outputs a signal according to the difference between the output value of the inflow phosphorus amount detection means and the reference value.

  According to the present invention, there is an effect that the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.

It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 1 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 2 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 3 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 4 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 5 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 6 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 7 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 8 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 9 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 10 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 11 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 12 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 13 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 14 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 15 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 16 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 17 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 18 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 19 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 20 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 21 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 22 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 23 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 24 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 25 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 26 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 27 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 28 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 29 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 30 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 31 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 32 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 33 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 34 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 35 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 36 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 37 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 38 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 39 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 40 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 41 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 42 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 43 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 44 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 45 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 46 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 47 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 48 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 49 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 50 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 51 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 52 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 53 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 54 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 55 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 56 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 57 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 58 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 59 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 60 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 61 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 62 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 63 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 64 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 65 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 66 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 67 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 68 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 69 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 70 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 71 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 72 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 73 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 74 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 75 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 76 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 77 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 78 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 79 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 80 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 81 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 82 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 83 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 84 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 85 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 86 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 87 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 88 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 89 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 90 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 91 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 92 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 93 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 94 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 95 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 96 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 97 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 98 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 99 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 100 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 101 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 102 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 103 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 104 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 105 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 106 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 107 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 108 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 109 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 110 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 111 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 112 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 113 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 114 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 115 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 116 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 117 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 118 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 119 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 120 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 121 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 122 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 123 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 124 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 125 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 126 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 127 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 128 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 129 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 130 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 131 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 132 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 133 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 134 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 135 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 136 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 137 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 138 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 139 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 140 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 141 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 142 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 143 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 144 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 145 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 146 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 147 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 148 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 149 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 150 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 151 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 152 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 153 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 154 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 155 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 156 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 157 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 158 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 159 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 160 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 161 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 162 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 163 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 164 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 165 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 166 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 167 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 168 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 169 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 170 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 171 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 172 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 173 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 174 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 175 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 176 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 177 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 178 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 179 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 180 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 181 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 182 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 183 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 184 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 185 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 186 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 187 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 188 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 189 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 190 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 191 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 192 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 193 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 194 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 195 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 196 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 197 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 198 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 199 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 200 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 201 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 202 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 203 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 204 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 205 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 206 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 207 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 208 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 209 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 210 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 211 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 212 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 213 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 214 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 215 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 216 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 217 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 218 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 219 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 220 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 221 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 222 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 223 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 224 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 225 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 226 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 227 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 228 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 229 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 230 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 231 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 232 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 233 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 234 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 235 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 236 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 237 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 238 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 239 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 240 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 241 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 242 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 243 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 244 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 245 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 246 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 247 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 248 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 249 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 250 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 251 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 252 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 253 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 254 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 255 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 256 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 257 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 258 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 259 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 260 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 261 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 262 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 263 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 264 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by Embodiment 265 of this invention. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by the prior art example 1. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by the prior art example 2. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by the prior art example 3. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by the prior art example 4. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by the prior art example 5. FIG. It is a block diagram which shows the control apparatus of the biological water treatment apparatus by the prior art example 6.

Embodiment 1 FIG.
1 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 1 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification, and the flow rate of the sewage flowing into the oxygen-free tank by bypass. The apparatus is configured to adjust (hereinafter referred to as bypass inflow sewage amount to the oxygen-free tank). In FIG. 1, 1 is a first sedimentation basin for storing sewage that is treated water flowing from outside the system, 2 is a biological reaction tank for storing a group of microorganisms (activated sludge) containing phosphorus accumulating bacteria, nitrifying bacteria and denitrifying bacteria, This is a final sedimentation basin for separating the mixed liquid flowing out from the biological reaction tank 2 into supernatant water and activated sludge, which are sewage after the activated sludge treatment.

  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, 5 is an anoxic tank in an anoxic state for performing a denitrification reaction by denitrifying bacteria, 6 is an aerobic tank which is in an aerobic state in order to make a phosphorus accumulating bacterium ingest phosphoric acid phosphorus and to perform nitrification reaction by nitrifying bacteria. Reference numeral 7 denotes an aeration tank for supplying air to the aerobic tank 6.

  In addition, a is a pipe connected to the first sedimentation basin 1 so that the sewage flowing from outside the system flows into the first sedimentation basin 1, and b is a pipe for flowing the sewage flowing out from the first sedimentation basin 1 into the biological reaction tank 2. The pipe connected to the first sedimentation tank 1 and the anaerobic tank 4, c was connected to the aerobic tank 6 and the final sedimentation tank 3 in order to flow the mixed solution flowing out from the biological reaction tank 2 into the final sedimentation tank 3. A pipe, d is a pipe connected to the final sedimentation basin 3 in order to discharge the supernatant water separated in the final sedimentation basin 3, and e is a mixture liquid in the aerobic tank 6 circulated to the anoxic tank 5. Therefore, a pipe connected to the aerobic tank 6 and the anaerobic tank 5, f is a pipe connected to the bottom of the final sedimentation tank 3 in order to take out the activated sludge separated in the final sedimentation tank 3 from the final sedimentation tank 3 , G is connected to the pipe f and the anaerobic tank 4 to return the activated sludge taken out from the final sedimentation tank 3 to the biological reaction tank 2. The continued pipe, h is a pipe connected to the pipe f in order to discharge the surplus activated sludge taken out from the final sedimentation basin 3 to the outside of the system, and j is an oxygen-free part of the sewage flowing from outside the system. This is a pipe connected to the pipe a and the anoxic tank 5 for bypass inflow into the tank 5.

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

  43 is a nitrate nitrogen concentration meter (denitrification amount detection means) for measuring the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5, and 31 is a setter for setting a target value of the nitrate nitrogen concentration. (Denitrification target value setting means) 21 is a predetermined value for the amount of sewage flowing into 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 setting device 31. Is a regulator (an anaerobic tank inflow water amount adjustment signal output means) that outputs the signal to the inflow-oxygen tank bypass inflow pump 12. The nitrate nitrogen concentration meter 43 is provided in the anoxic tank 5. The regulator 21 is connected to the nitrate nitrogen concentration meter 43 through the signal line 43a, the setting device 31 through the signal line 31a, and the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a. .

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 is a value obtained by, for example, the amount of sewage that flows into the anoxic tank 5 according to the following equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Is output.
Q _ano = Q _ano0 + K _ano1 (C _{NO3_ano} −C _{NO3_ano} ^* ) (1.1)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano1 : Constant (> 0)
C _{NO3_ano} ^* : Target value of nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 C _{NO3_ano} : Measurement value of nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 Output of the regulator 21 Is transmitted to the inflow-anoxic tank bypass inflow pump 12 through the signal line 21a.

From the above, if the measured value C _{NO3_ano} of the nitrate nitrogen concentration is larger than the target value C _{NO3_ano} ^{*, the} amount of sewage water Q _ano flowing into the anoxic tank 5 increases, and the amount of organic matter supplied to the anoxic tank 5 increases. To do. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the measured value C _{NO3_ano} of nitrate nitrogen concentration is less than the target value C _{NO3_ano} ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is reduced, organic feed to anoxic tank 5 is reduced To do. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

  As described above, according to the first embodiment, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired.

Embodiment 2. FIG.
FIG. 2 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 2 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. In FIG. 2, 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 first sedimentation tank 1 to the oxygen-free tank 5, and 11 is a bypass to the oxygen-free tank 5. An initial sedimentation-anoxic tank bypass inflow pump (anoxic tank inflow water amount adjusting means) provided in the pipe i for adjusting the flow rate of inflowing sewage.

43 is a nitrate nitrogen concentration meter for measuring the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5, 31 is a setting device for setting the target value of the nitrate nitrogen concentration, and 21 is the nitrate nitrogen concentration. In response to the difference between the measured value of the total 43 and the target value set in the setting device 31, a signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value is sent to the initial settling-oxygen tank bypass inflow pump 11. It is a regulator that outputs. The nitrate nitrogen concentration meter 43 is provided in the anoxic tank 5. The regulator 21 is connected to the nitrate nitrogen concentration meter 43 via the signal line 43a, the setting device 31 via the signal line 31a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a. Yes.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 21a.

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

As described above, according to the second embodiment, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, the same effect as in the first embodiment can be obtained.
Further, according to the second embodiment, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 3 FIG.
FIG. 3 is a block diagram showing a control apparatus for 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. In FIG. 3, 53 is an oxidation-reduction potentiometer (denitrification amount detection means) for measuring the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5, and 32 is a setter for setting a target value of the oxidation-reduction potential ( (Denitrification target value setting means) 22 is configured to set the amount of sewage flowing into the anoxic tank 5 to a predetermined value according to the difference between the measured value of the oxidation-reduction potentiometer 53 and the target value set in the setting device 32. It is a regulator (an oxygen-free tank inflow water amount adjustment signal output means) that outputs a signal to the inflow-oxygen tank bypass inflow pump 12. The oxidation-reduction potentiometer 53 is provided in the anoxic tank 5. The regulator 22 is connected to the oxidation-reduction potentiometer 53 through the signal line 53a, the setting device 32 through the signal line 32a, and the inflow-oxygen tank bypass inflow pump 12 through 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 detailed description thereof is 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 by the oxidation-reduction potentiometer 53, and the measured value is transmitted to the regulator 22 via the signal line 53a. The target value set in the setting device 32 is transmitted to the adjuster 22 through the signal line 32a. The regulator 22 determines the amount of sewage that flows into the anoxic tank 5 according to, for example, the following equation (2.1) according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. Output a signal.
Q _ano = Q _ano0 + K _ano2 (V _ano −V _ano ^* ) (2.1)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano2 : Constant (> 0)
V _ano ^* : target value of oxidation / reduction potential of sewage in the mixed solution in the oxygen-free tank 5 V _ano : measured value of oxidation / reduction potential of sewage in the mixed solution in the oxygen-free tank 5 The output of the controller 22 is a signal. It is transmitted to the inflow-oxygen tank bypass inflow pump 12 via the line 22a.

As described above, if the measured value V _ano of the oxidation-reduction potential is larger than the target value V _ano ^* , the bypass inflow sewage amount Q _ano to the anaerobic tank 5 increases and the organic matter supply amount to the anoxic tank 5 increases. . As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the measured value V _ano of the oxidation-reduction potential is smaller than the target value V _ano ^{*, the} amount of sewage water Q _ano flowing into the anoxic tank 5 decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. . As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed 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 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that 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 changes. The effect that can be obtained.

Embodiment 4 FIG.
4 is a block diagram showing a control apparatus for 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. In FIG. 4, 53 is an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5, 32 is a setter that sets a target value of the oxidation-reduction potential, and 22 is an oxidation-reduction potentiometer 53. A signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value according to the difference between the measured value of the value and the target value set in the setting device 32 is output to the initial settling-anoxic tank bypass inflow pump 11. It is a regulator. The oxidation-reduction potentiometer 53 is provided in the anoxic tank 5. The regulator 22 is connected to the oxidation-reduction potentiometer 53 via the signal line 53a, the setting device 32 via the signal line 32a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 22a. . The other constituent elements are the same as or equivalent to those shown in FIG.

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 by the oxidation-reduction potentiometer 53, and the measured value is transmitted to the regulator 22 via the signal line 53a. The target value set in the setting device 32 is transmitted to the adjuster 22 through the signal line 32a. The regulator 22 is a signal that sets the amount of sewage flowing into the anaerobic tank 5 according to, for example, the equation (2.1) according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. Is output. The output of the regulator 22 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 through a signal line 22a.

  From the above, if the measured value of the oxidation-reduction potential is greater than the target value, the amount of sewage flowing into 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 amount of nitrogen removal increases. On the other hand, 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 is reduced and the amount of organic matter supplied to the anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

As described above, according to the fourth embodiment, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a 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 sewage flowing into the bypass, the same effect as in the third embodiment can be obtained.
Further, according to the fourth embodiment, a part of the sewage flowing out of the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 5 FIG.
5 is a block diagram showing a control apparatus for 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 nitrate nitrogen concentration of the sewage in the mixed solution in the anoxic tank and the nitrate nitrogen concentration of the effluent, which is the sewage after the activated sludge treatment, is calculated. The apparatus is configured to adjust the amount of sewage flowing into the anoxic tank. In FIG. 5, 43 is a nitrate nitrogen concentration meter (denitrification amount detection means, calculation means) for measuring the concentration of nitrate nitrogen in sewage in the mixed solution in the oxygen-free tank 5, and 46 is the concentration of nitrate nitrogen in the discharged water. Nitrate nitrogen concentration meter (denitrification amount detection means, calculation means) 81 for calculating 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 discharged water A calculator (denitrification amount detection means, calculation means) 33 for setting the target value of the difference between the nitrate nitrogen concentration of the sewage in the mixed liquid in the oxygen-free tank 5 and the nitrate nitrogen concentration of the discharged water (Denitrification target value setting means), 23 sets the amount of sewage flowing into the anoxic tank 5 to a predetermined value according to the difference between the calculated value of the calculator 81 and the target value set in the setter 33. Controller for outputting a signal to the inflow-anoxic tank bypass inflow pump 12 (anaerobic tank inflow water amount adjustment signal output means) It is. 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. The computing unit 81 is connected to the nitrate nitrogen concentration meter 43 via the signal line 43a and to the nitrate nitrogen concentration meter 46 via the signal line 46a. The regulator 23 is connected to the computing unit 81 through the signal line 81a, the setting unit 33 through the signal line 33a, and the inflow-oxygen tank bypass inflow pump 12 through 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 detailed description thereof is omitted.

Next, the operation will be described.
The nitrate nitrogen concentration of 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 discharged water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the computing unit 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 discharged water, for example, according to the following equation (3.1).
D _{NO3_ano} = C _{NO3_out-} C _{NO3_ano} (3.1)
here,
D _{NO3_ano} : Calculated value of the difference between the nitrate nitrogen concentration of the sewage in the mixed solution in the anaerobic tank 5 and the nitrate nitrogen concentration of the discharged water C _{NO3_out} : The nitrate nitrogen concentration of the discharged water C _{NO3_ano} : The anoxic tank 5 Nitrate nitrogen concentration of sewage in the liquid mixture

The calculated value of the calculator 81 is transmitted to the adjuster 23 through the signal line 81a. The target value set in the setting device 33 is transmitted to the adjuster 23 through the signal line 33a. According to the difference between the calculated value of the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the effluent water, and the predetermined target value, A signal that outputs the amount of sewage flowing into the anoxic tank 5 according to, for example, the following equation (3.2) is output.
_{Q ano = Q ano0 + K ano3} (D NO3_ano -D NO3_ano *) (3.2)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano3 : Constant (<0)
D _{NO3_ano} ^* : Target value of 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 discharged water D _{NO3_ano} : The nitrate of the sewage in the mixed solution in the oxygen-free tank 5 The calculated value of the difference between the basic nitrogen concentration and the nitrate nitrogen concentration of the discharged water The output of the regulator 23 is transmitted to the inflow-anoxic tank bypass inflow pump 12 through the signal line 23a.

From the above, if the calculated value D _{NO3_ano} of 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 discharged water is smaller than the target value D _{NO3_ano} ^* , the oxygen-free tank 5 As a result, the amount of sewage _Qano flowing into the bypass increases, and the amount of organic matter supplied to the oxygen-free tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the calculated value D _{NO3_ano} of 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 discharged water is larger than the target value D _{NO3_ano} ^* , the oxygen-free tank 5 The amount of sewage water Q _ano flowing into the 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 amount of nitrogen removed decreases.

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

Embodiment 6 FIG.
FIG. 6 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 6 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. In FIG. 6, 43 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5, 46 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of discharged water, 81 Is a calculator for calculating the difference between the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the discharged water, and 33 is the nitrate nature of the sewage in the mixed solution in the oxygen-free tank 5 A setter 23 for setting the target value of the difference between the nitrogen concentration and the nitrate nitrogen concentration of the effluent water, and the anaerobic tank 5 according to the difference between the calculated value of the calculator 81 and the target value set in the setter 33 It is a regulator which outputs the signal which makes the bypass inflow sewage amount to a predetermined value to the first sedimentation-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. The computing unit 81 is connected to the nitrate nitrogen concentration meter 43 via the signal line 43a and to the nitrate nitrogen concentration meter 46 via the signal line 46a. The regulator 23 is connected to the computing unit 81 via the signal line 81a, the setting unit 33 via the signal line 33a, and the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 23a. The other constituent elements are the same as or equivalent to those shown in FIG.

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

  The calculated value of the calculator 81 is transmitted to the adjuster 23 through the signal line 81a. The target value set in the setting device 33 is transmitted to the adjuster 23 through the signal line 33a. According to the difference between the calculated value of the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the effluent water, and the predetermined target value, A signal that outputs the amount of sewage flowing into the anaerobic tank 5 according to, for example, equation (3.2) is output. The output of the regulator 23 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 through a signal line 23a.

  From the above, if the calculated value of 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 effluent water is smaller than the target value, the bypass flow into the oxygen-free tank 5 The amount of water increases, and the amount of organic matter supplied to the oxygen-free tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the contrary, if the calculated value of 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 discharged water is larger than the target value, the bypass flow into the oxygen-free tank 5 The amount of water decreases, and the amount of organic matter supplied to the oxygen-free tank 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

As described above, according to the sixth embodiment, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of the effluent in the mixed solution in the anoxic tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter to be supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the same effect as in the fifth embodiment is obtained. It is done.
Further, according to the sixth embodiment, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 7 FIG.
FIG. 7 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 7 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. In FIG. 7, reference numeral 43 denotes a nitrate nitrogen concentration meter (denitrification amount detection means, estimation means) for measuring the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5, and 31 denotes a target value of the nitrate nitrogen concentration. Is a storage circuit for storing nitrate nitrogen concentration data of sewage in the mixed solution in the oxygen-free tank 5 (denitrification amount detection means, estimation means), and 82 is stored in the storage circuit 71. An arithmetic unit (denitrification amount detection means, estimation means) for estimating sewage nitrate nitrogen concentration in the mixed liquid in the oxygen-free tank 5 using the data of the nitrate nitrogen concentration, 21 is an estimated value of the arithmetic unit 82 Is a regulator that outputs a signal that sets the bypass inflow sewage amount to the anaerobic tank 5 to a predetermined value in accordance with the difference between the target value set in the setter 31 and the inflow-anoxic tank bypass inflow pump 12. . The nitrate nitrogen concentration meter 43 is provided in the anoxic tank 5. The memory circuit 71 is connected to the nitrate nitrogen concentration meter 43 through a signal line 43a. The computing unit 82 is connected to the storage circuit 71 via a signal line 71a. The regulator 21 is connected to the computing unit 82 through the signal line 82a, the setting unit 31 through the signal line 31a, and the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is 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 storage circuit 71 via the signal line 43a. The computing unit 82 estimates the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free 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 a least square method. The nitrate nitrogen concentration data necessary for the analysis is transmitted from the storage circuit 71 via the signal line 71a. The estimated value of the calculator 82 is transmitted to the controller 21 via the signal line 82a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 obtains the amount of sewage that flows into the anaerobic tank 5 according to a formula similar to the formula (1.1), for example, according to the difference between the estimated value of the nitrate nitrogen concentration and a predetermined target value. Output a signal with the value obtained. The output of the regulator 21 is transmitted to the inflow-anoxic tank bypass inflow pump 12 through a signal line 21a.

  From the 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 increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal 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 is reduced, and the amount of organic matter supplied to the anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

As described above, according to the seventh embodiment, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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.
Further, according to the seventh embodiment, since the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is estimated using the accumulated nitrate nitrogen concentration data, the analysis of the nitrate nitrogen concentration is performed. Even when time is required, an effect of quickly adjusting the amount of organic matter supplied to the oxygen-free tank 5 can be obtained.

Embodiment 8 FIG.
FIG. 8 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 8 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification so as to adjust the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as follows. In FIG. 8, 43 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5, 31 is a setter that sets a target value of nitrate nitrogen concentration, and 71 is oxygen-free. A storage circuit 82 stores the nitrate nitrogen concentration data of the sewage in the mixed solution in the tank 5, and uses the nitrate nitrogen concentration data stored in the storage circuit 71 to store the data in the mixed solution in the oxygen-free tank 5. A calculator 21 for estimating the nitrate nitrogen concentration of the sewage, 21 is a predetermined value for the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value of the calculator 82 and the target value set in the setter 31. Is a regulator that outputs a signal to the initial settling-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 43 is provided in the anoxic tank 5. The memory circuit 71 is connected to the nitrate nitrogen concentration meter 43 through a signal line 43a. The computing unit 82 is connected to the storage circuit 71 via a signal line 71a. The regulator 21 is connected to the computing unit 82 through the signal line 82a, the setting unit 31 through the signal line 31a, and the initial sedimentation-anoxic tank bypass inflow pump 11 through the signal line 21a. The other constituent elements are the same as or equivalent to those shown in FIG.

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 storage circuit 71 via the signal line 43a. The computing unit 82 estimates the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free 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 a least square method. The nitrate nitrogen concentration data necessary for the analysis is transmitted from the storage circuit 71 via the signal line 71a. The estimated value of the calculator 82 is transmitted to the controller 21 via the signal line 82a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 obtains the amount of sewage that flows into the anaerobic tank 5 according to a formula similar to the formula (1.1), for example, according to the difference between the estimated value of the nitrate nitrogen concentration and a predetermined target value. Output a signal with the value obtained. The output of the regulator 21 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 21a.

  From the 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 increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal 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 is reduced, and the amount of organic matter supplied to the anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed 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 oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to is adjusted, the same effect as in the seventh embodiment can be obtained.
Further, according to the eighth embodiment, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.
Further, according to the eighth embodiment, since the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is estimated using the accumulated nitrate nitrogen concentration data, the analysis of the nitrate nitrogen concentration is performed. Even when time is required, an effect of quickly adjusting the amount of organic matter supplied to the oxygen-free tank 5 can be obtained.

Embodiment 9 FIG.
FIG. 9 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 9 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. In FIG. 9, 46 is a nitrate nitrogen concentration meter (denitrification amount detection means, nitrogen concentration meter) for measuring the nitrate nitrogen concentration of the discharged water, 34 is a setter for setting a target value of nitrate nitrogen concentration, and 24 is In response to a 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 making the bypass inflow sewage amount to the oxygen-free tank 5 into a predetermined value flows in. It is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs to the anaerobic tank bypass inflow pump 12. The nitrate nitrogen concentration meter 46 is provided in the pipe d. The regulator 24 is connected to the nitrate nitrogen concentration meter 46 via the signal line 46a, the setting device 34 via the signal line 34a, and the inflow-oxygen tank bypass flow pump 12 via the signal line 24a. . The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The nitrate nitrogen concentration of the discharged water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the regulator 24 via the signal line 46a. The target value set in the setting device 34 is transmitted to the adjuster 24 through the signal line 34a. The controller 24 obtains the amount of sewage that flows into the anoxic tank 5 according to, for example, the following equation (4.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Is output.
Q _ano = Q _ano0 + K _ano4 (C _{NO3_out} −C _{NO3_out} ^* ) (4.1)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano4 : Constant (> 0)
C _{NO3_out} ^* : Target value of nitrate nitrogen concentration of discharge water C _{NO3_out} : Measurement value of nitrate nitrogen concentration of discharge water It is done.

Than, if the measured value C _{NO3_out} of nitrate nitrogen concentration is greater than the target value C _{NO3_out} ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is increased, organic feed to the anoxic tank 5 is increased by more than To do. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the measured value C _{NO3_out} of nitrate nitrogen concentration is less than the target value C _{NO3_out} ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is reduced, organic feed to anoxic tank 5 is reduced To do. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

  As described above, according to the ninth embodiment, the concentration of nitrate nitrogen in the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced.

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

Embodiment 10 FIG.
FIG. 10 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 10 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. In FIG. 10, 46 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of effluent water, 34 is a setter that sets a target value of nitrate nitrogen concentration, and 24 is a measurement value and setting of the nitrate nitrogen concentration meter 46. It is a regulator that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value in accordance with the difference from the target value set in the vessel 34 to the initial settling-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 46 is provided in the pipe d. The regulator 24 is connected to the nitrate nitrogen concentration meter 46 via the signal line 46a, the setting device 34 via the signal line 34a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 24a. Yes. The other constituent elements are the same as or equivalent to those shown in FIG.

Next, the operation will be described.
The nitrate nitrogen concentration of the discharged water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the regulator 24 via the signal line 46a. The target value set in the setting device 34 is transmitted to the adjuster 24 through the signal line 34a. The regulator 24 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (4.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 24 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 through a signal line 24a.

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

As described above, according to the tenth embodiment, the nitrate nitrogen concentration of discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from a predetermined target value. Thus, the amount of organic matter supplied to the anaerobic tank 5 is adjusted, so that the same effect as in the ninth embodiment can be obtained.
Further, according to the tenth embodiment, since a part of the sewage flowing out of the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-anoxic tank bypass inflow pump pump 11 is obtained.

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

Embodiment 11 FIG.
FIG. 11 is a block diagram showing a biological water treatment apparatus control apparatus according to Embodiment 11 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. In FIG. 11, 46 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of effluent water, and 25 is a predetermined value of the amount of sewage flowing into the anoxic tank 5 according to the measured value of the nitrate nitrogen concentration meter 46. Is a regulator (an anaerobic tank inflow water amount adjustment signal output means) that outputs the signal to the inflow-oxygen tank bypass inflow pump 12. The nitrate nitrogen concentration meter 46 is provided in the pipe d. The regulator 25 is connected to the nitrate nitrogen concentration meter 46 via the signal line 46a and to the inflow-oxygen tank bypass inflow pump 12 via the signal line 25a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The nitrate nitrogen concentration of the discharged water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the regulator 25 via the signal line 46a. The regulator 25 outputs a signal that sets the amount of sewage flowing into the anoxic tank 5 to a value obtained, for example, according to the following equation (5.1), according to the measured value of the nitrate nitrogen concentration.
Q _ano = Q _ano0 + K _ano5 C _{NO3_out} (5.1)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano5 : Constant (> 0)
C _{NO3_out} : Measurement value of nitrate nitrogen concentration of discharged water The output of the regulator 25 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through a signal line 25a.

From the above, depending on whether the measured value C _{NO3_out} of nitrate nitrogen concentration 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 nitrogen removal amount increases or decreases.

  As described above, according to the eleventh embodiment, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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.

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

Embodiment 12 FIG.
FIG. 12 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 12 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. In FIG. 12, 46 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water, and 25 is a predetermined value of the amount of sewage flowing into the anoxic tank 5 according to the measured value of the nitrate nitrogen concentration meter 46. Is a regulator that outputs a signal to the initial settling-anoxic tank bypass inflow pump 11. The nitrate nitrogen concentration meter 46 is provided in the pipe d. The regulator 25 is connected to the nitrate nitrogen concentration meter 46 via the signal line 46a and to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 25a. The other constituent elements are the same as or equivalent to those shown in FIG.

Next, the operation will be described.
The nitrate nitrogen concentration of the discharged water is measured by the nitrate nitrogen concentration meter 46, and the measured value is transmitted to the regulator 25 via the signal line 46a. The regulator 25 outputs a signal that sets the amount of sewage flowing into the anoxic tank 5 to a value obtained according to, for example, the equation (5.1) according to the measured value of the nitrate nitrogen concentration. The output of the regulator 25 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 25a.

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

As described above, according to the twelfth embodiment, the concentration of nitrate nitrogen in the effluent 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 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 from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-anoxic tank bypass inflow pump pump 11 is obtained.

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

Embodiment 13 FIG.
FIG. 13 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 13 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 that is sewage before activated sludge treatment, as a means for detecting the amount of nitrogen flowing from outside the system, and is oxygen-free. The apparatus is configured to adjust the amount of sewage by-passing into the tank. In FIG. 13, 61 is a total nitrogen concentration meter (inflow nitrogen amount detecting means, nitrogen concentration meter) that measures the total nitrogen concentration of sewage flowing into the biological reaction tank 2, and 36 is a target value for the total nitrogen concentration of the effluent water. The setting device 26 is configured to receive a signal that sets the amount of sewage flowing into the anaerobic 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 regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs to the anaerobic tank bypass inflow pump 12. The total nitrogen concentration meter 61 is provided in the pipe b. The regulator 26 is connected to the total nitrogen concentration meter 61 through the signal line 61a, the setting device 36 through the signal line 36a, and the inflow-oxygen tank bypass inflow pump 12 through the signal line 26a. The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured by a total nitrogen concentration meter 61, and the measured value is transmitted to the regulator 26 via a signal line 61a. The target value set in the setting device 36 is transmitted to the adjuster 26 through the signal line 36a. According to the difference between the measured value of the total nitrogen concentration and the predetermined target value, the regulator 26 determines the amount of bypass inflow sewage to the anaerobic tank 5 according to, for example, the following equation (6.1): Output a signal.
_{Q ano = Q ano0 + K ano6} (C TN_in -C TN_out *) (6.1)
here,
Q _ano : The amount of sewage flowing into the anaerobic tank 5 Q _ano0 : Constant K _ano6 : Constant (> 0)
C _{TN_out} ^* : target value of total nitrogen concentration of _effluent water C _{TN_in} : measured value of total nitrogen concentration of sewage flowing into biological reaction tank 2 It is transmitted to the pump 12.

From the above, depending on how much the measured value _{CTN_in} of the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is larger than the target value _{CTN_out} ^* of the total nitrogen concentration of the discharged water, The amount of water Q _ano increases and decreases, and the amount of organic matter supplied to the anoxic tank 5 increases and decreases. As a result, the nitrogen removal amount 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 the oxygen free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 14 FIG.
FIG. 14 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 14 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. In FIG. 14, 61 is a total nitrogen concentration meter for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2, 36 is a setting device for setting a target value for the total nitrogen concentration of discharged water, and 26 is a total nitrogen concentration meter 61. A signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value according to the difference between the measured value of the value and the target value set in the setting device 36 is output to the initial settling-anoxic tank bypass inflow pump 11. It is a regulator. The total nitrogen concentration meter 61 is provided in the pipe b. The regulator 26 is connected to the total nitrogen concentration meter 61 via the signal line 61a, the setting device 36 via the signal line 36a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 26a. . The other constituent elements are the same as or equivalent to those shown in FIG.

Next, the operation will be described.
The total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured by a total nitrogen concentration meter 61, and the measured value is transmitted to the regulator 26 via a signal line 61a. The target value set in the setting device 36 is transmitted to the adjuster 26 through the signal line 36a. The regulator 26 is a signal that sets the amount of sewage that flows into the anoxic tank 5 according to, for example, the equation (6.1) according to the difference between the measured value of the total nitrogen concentration and a predetermined target value. Is output. The output of the regulator 26 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 through a signal line 26a.

  From the above, depending on how much the measured value of the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is larger than the target value of the total nitrogen concentration of effluent water, the amount of sewage flowing into the anoxic tank 5 is increased or decreased. The amount of organic matter supplied to the anaerobic tank 5 increases or decreases. As a result, the nitrogen removal amount increases or decreases.

As described above, according to the fourteenth embodiment, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured. Since the amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the 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 from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-anoxic tank bypass inflow pump 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 sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 15 FIG.
FIG. 15 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 15 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. In FIG. 15, 61 is a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into the biological reaction tank 2, and 27 is a bypass inflow sewage amount to the anoxic tank 5 according to the measured value of the total nitrogen concentration meter 61. It is a regulator (anoxic tank inflow water amount adjustment signal output means) that outputs a signal having a predetermined value to the inflow-oxygen tank bypass inflow pump 12. The total nitrogen concentration meter 61 is provided in the pipe b. The regulator 27 is connected to the total nitrogen concentration meter 61 via the signal line 61a and to the inflow-anoxic 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 detailed description thereof is omitted.

Next, the operation will be described.
The total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured by the total nitrogen concentration meter 61, and the measured value is transmitted to the controller 27 via the signal line 61a. The regulator 27 outputs a signal for setting the amount of sewage flowing into the anoxic tank 5 to a value obtained, for example, according to 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)
here,
Q _ano : The amount of sewage flowing into the anaerobic tank 5 Q _ano0 : Constant K _ano7 : Constant (> 0)
C _{TN —in} : measured value of total nitrogen concentration of sewage flowing into the biological reaction tank 2 The output of the regulator 27 is transmitted to the inflow-oxygen tank bypass inflow pump 12 via the signal line 27a.

From the above, depending on how large the measured value C _{TN_in} of the total nitrogen concentration is, the bypass inflow sewage amount Q _ano to the anoxic tank 5 increases and decreases, and the organic matter supply amount to the anoxic tank 5 increases and decreases. As a result, the nitrogen removal amount increases or decreases.

  As described above, according to the fifteenth embodiment, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 16 FIG.
FIG. 16 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 16 of the present invention. The present embodiment includes a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into the biological reaction tank 2 as a means for detecting the amount of nitrogen flowing into the biological water treatment apparatus. The apparatus is configured to adjust the amount of sewage flowing into the bypass. In FIG. 16, 61 is a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into the biological reaction tank 2, and 27 is a bypass inflow sewage amount to the anoxic tank 5 according to the measured value of the total nitrogen concentration meter 61. It is a regulator that outputs a signal having a predetermined value to the initial sedimentation-anoxic tank bypass inflow pump 11. The total nitrogen concentration meter 61 is provided in the pipe d. The regulator 27 is connected to the total nitrogen concentration meter 61 via the signal line 61a and to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 27a. The other constituent elements are the same as or equivalent to those shown in FIG.

Next, the operation will be described.
The total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured by the total nitrogen concentration meter 61, and the measured value is transmitted to the controller 27 via the signal line 61a. The regulator 27 outputs a signal that sets the bypass inflow sewage amount to the oxygen-free tank to a value obtained according to, for example, the formula (7.1) according to the measured value of the total nitrogen concentration. The output of the regulator 27 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 through a signal line 27a.

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

As described above, according to the sixteenth embodiment, the total nitrogen concentration of sewage 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 anaerobic tank 5 is adjusted, so that 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 from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 17. FIG.
FIG. 17 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 17 of the present invention. This embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in sewage in the mixed solution in the anaerobic tank as means for detecting the amount of phosphorus discharged, and the flow rate of sewage that flows into the anaerobic tank (hereinafter referred to as the flow rate). The apparatus is configured to adjust the amount of sewage that flows into the anaerobic tank. 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 flowing into the anaerobic tank 4 by bypass. Is an inflow-anaerobic tank bypass inflow pump (anaerobic tank inflow water amount adjusting means) provided in the pipe k for adjusting the pressure.

Reference numeral 142 denotes a phosphoric acid phosphorus concentration meter (phosphorus discharge amount detecting means) for measuring the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4, and 131 is a setter for setting a target value of the phosphoric acid phosphorus concentration ( (Phosphorous discharge target value setting means) 121 and 121 set 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 142 and the target value set in the setting device 131. It is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs a signal to the inflow-anaerobic tank bypass inflow pump 13. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The regulator 121 is connected to the phosphoric acid phosphorus concentration meter 142 through the signal line 142a, the setting device 131 through the signal line 131a, and the inflow-anaerobic tank bypass inflow pump 13 through the signal line 121a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is 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 regulator 121 via the signal line 142a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. According to the difference between the measured value of the phosphoric acid phosphorus concentration and the predetermined target value, the regulator 121 determines the amount of sewage flowing into the anaerobic tank 4 according to the following equation (8.1), for example. Output a signal.
_{Q ana = Q ana0 + K ana1} (C PO4_ana -C PO4_ana *) (8.1)
here,
Q _ana: bypass inlet sewage quantity to the anaerobic tank ₄ Q ana0: constant K _ANA1: constant (<0)
C _{PO4_ana} ^* : Target value of phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 C _{PO4_ana} : Measurement value of phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 The output of the regulator 121 is a signal. It is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via the line 121a.

From the above, if the measured value C _{PO4_ana} of the phosphoric acid phosphorus concentration is smaller than the target value C _{PO4_ana} ^* , the bypass inflow sewage amount Q _ana to the anaerobic tank 4 is increased, and the organic substance supply amount to the anaerobic tank 4 is increased. 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, 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 seventeenth embodiment, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured and bypassed to the anaerobic tank 4 according to the difference from a predetermined target value. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

Embodiment 18 FIG.
FIG. 18 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 18 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed liquid 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. The device is configured. In FIG. 18, reference numeral 152 denotes an oxidation-reduction potentiometer (phosphorus discharge amount detecting means) that measures the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, and 132 denotes a setter (phosphorus) that sets a target value of the oxidation-reduction potential. (Discharge target value setting means) 122, 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 oxidation-reduction potentiometer 152 and the target value set in the setting device 132. It is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs to the inflow-anaerobic tank bypass inflow pump 13. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The regulator 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. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Next, the operation will be described.
The oxidation-reduction potential of the sewage in the mixed liquid in the anaerobic tank 4 is measured by the oxidation-reduction potentiometer 152, and the measured value is transmitted to the regulator 122 via the signal line 152a. Further, the target value set in the setting device 132 is transmitted to the adjuster 122 through the signal line 132a. The regulator 122 sets the amount of sewage flowing into the anaerobic tank 4 according to, for example, the following formula (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 : Bypass inflow sewage amount to anaerobic tank 4 Q _ana0 : Constant K _ana2 : Constant (> 0)
V _ana ^* : target value of redox potential of sewage in the mixed solution in the anaerobic tank 4 V _ana : measured value of redox potential of sewage in the mixed liquid in the anaerobic tank 4 The output of the regulator 122 is the signal line 122a. To the inflow-anaerobic tank bypass inflow pump 13.

From the above, if the measured value V _ana of the oxidation-reduction potential is larger than the target value V _ana ^* , the bypass inflow sewage amount Q _ana to the anaerobic tank 4 increases and the organic matter supply amount to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the other hand, if the measured value V _ana of the oxidation-reduction potential is smaller than the target value V _ana ^* , the bypass inflow sewage amount Q _ana to the anaerobic tank 4 is reduced and the organic substance supply amount 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 eighteenth embodiment, the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4 is measured, and the bypass flows into the anaerobic tank 4 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, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system fluctuates, An effect of reliably reducing the amount can be obtained.

Embodiment 19. FIG.
FIG. 19 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 19 of the present invention. This embodiment is equipped with a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and adjusts the amount of sewage flowing into the anaerobic tank. The apparatus is configured as described above. In FIG. 19, 162 is 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 is a setting for setting a target value of the phosphorus content. (A phosphorus discharge target value setting means) 123 is a predetermined value for 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 setting device 133. Is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs to the inflow-anaerobic tank bypass inflow pump 13. The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The regulator 123 is connected to the phosphorus content measuring device 162 through the signal line 162a, the setting device 133 through the signal line 133a, and the inflow-anaerobic tank bypass inflow pump 13 through the signal line 123a. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Next, the operation will be described.
The phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured by the phosphorus content measuring device 162, and the measured value is transmitted to the regulator 123 via the signal line 162a. Further, the target value set in the setting unit 133 is transmitted to the adjuster 123 via the signal line 133a. The regulator 123 sets the amount of sewage flowing into the anaerobic tank 4 according to, for example, the following formula (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)
here,
Q _ana : Bypass inflow sewage amount to anaerobic tank 4 Q _ana0 : Constant K _ana3 : Constant (<0)
P _{acm_ana} ^* : Target value of phosphorus content of phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 _{Pa cm_ana} : Measurement value of phosphorus content of phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 Output of the regulator 123 Is transmitted to the inflow-anaerobic tank bypass inflow pump 13 through the signal line 123a.

From the above, smaller than the phosphorus content of the measured value P _{Acm_ana} 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, if phosphorus content measured value P _{Acm_ana} is greater target value _P acm_ana ^* than the 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 amount to the anaerobic tank 4 is determined according to the difference from the predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus can be obtained.

Embodiment 20. FIG.
FIG. 20 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 20 of the present invention. This embodiment includes a device for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank as means for detecting the phosphorus discharge amount. The apparatus is configured to adjust the amount of sewage flowing into the anaerobic tank. In FIG. 20, reference numeral 142 denotes a phosphoric acid phosphorus concentration meter (phosphorus discharge amount detection means, calculation means) that measures the concentration of phosphoric acid phosphorus in the mixed liquid in the anaerobic tank 4, and 141 denotes sewage that flows into the biological reaction tank 2. A phosphoric acid phosphorus concentration meter (phosphorus discharge amount detection means, calculation means) 181 for measuring the phosphoric acid phosphorus concentration of the sewage in the mixed liquid in the anaerobic tank 4 and the sewage flowing into the biological reaction tank 2 An arithmetic unit (phosphorus discharge amount detection means, calculation means) 134 for calculating the difference between the phosphoric acid phosphorus concentration of the sewage and the sewage flowing into the biological reaction tank 2 and the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 A setter (phosphorus discharge target value setting means) 124 for setting a target value of the difference between the phosphoric acid phosphorus concentration and anaerobic according to the difference between the calculated value of the calculator 181 and the target value set in the setter 134 The amount of sewage flowing into the tank 4 Flowing a signal to - a regulator that outputs the anaerobic tank bypass inlet pump 13 (anaerobic tank inflow water amount adjustment signal output unit). 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 computing unit 181 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The regulator 124 is connected to the computing unit 181 through the signal line 181a, the setting unit 134 through the signal line 134a, and the inflow-anaerobic tank bypass inflow pump 13 through the signal line 124a. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the calculator 181 via the signal line 141a. The calculator 181 calculates the difference between the phosphorous phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of the sewage flowing into the biological reaction tank 2 according to, for example, the following equation (11.1). To do.
D _{PO4_ana_in} = C _{PO4_ana} −C _{PO4_in} (11.1)
here,
D _{PO4_ana_in} : Calculated value of the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 C _{PO4_ana} : Sewage in the mixed solution in the anaerobic tank 4 Phosphoric acid phosphorus concentration _{CPO4_in of} sewage water flowing into the biological reactor 2

The calculated value of the calculator 181 is transmitted to the adjuster 124 through the signal line 181a. Further, the target value set in the setting unit 134 is transmitted to the adjuster 124 through the signal line 134a. The regulator 124 calculates the difference between the phosphoric phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 and a predetermined target value. Depending on the difference, a signal that outputs the amount of sewage flowing into the anaerobic tank 4 according to the following equation (11.2) is output.
_{Q ana = Q ana0 + K ana4} (D PO4_ana_in -D PO4_ana_in *) (11.2)
here,
Q _ana: bypass inlet sewage quantity to the anaerobic tank ₄ Q ana0: constant _K ana4: constant (<0)
D _{PO4_ana_in} ^* : Target value of the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 D _{PO4_ana_in} : In the mixed solution in the anaerobic tank 4 The calculated value of the difference between the phosphoric acid phosphorus concentration of the sewage and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 The output of the regulator 124 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via the signal line 124a.

From the above, if the calculated value D _{PO4_ana_in} 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 D _{PO4_ana_in} ^* , the bypass inlet sewage quantity Q _ana to the anaerobic tank 4 increases, organic feed to the anaerobic tank 4 increases. As a result, phosphorus discharge increases and the amount of phosphorus removal increases. Conversely, if the calculated value D _{PO4_ana_in} of the difference between the phosphorous phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration flowing into the biological reaction tank 2 is larger than the target value D _{PO4_ana_in} ^* , the bypass inlet sewage quantity Q _ana to the anaerobic tank 4 decreases, organic feed to the anaerobic tank 4 decreases. As a result, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

  As described above, according to the twentieth embodiment, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 are measured, and those 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 according to the difference between the calculated value of the difference and a predetermined target value, the phosphorus discharge amount is kept constant. Even when the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the system can be reliably reduced.

Embodiment 21. FIG.
FIG. 21 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 21 of the present invention. This embodiment includes a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, and the apparatus is adjusted so as to adjust the amount of sewage flowing into the anaerobic tank. It is composed. In FIG. 21, 142 is a phosphoric acid phosphorus concentration meter (phosphorus discharge amount detecting means, estimating means) for measuring the phosphoric acid phosphorus concentration of 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 for setting, a storage circuit (phosphorus discharge amount detecting means, estimating means) for storing sewage phosphoric acid phosphorus concentration data in the mixed liquid in the anaerobic tank 4, and 182 for phosphorus stored in the storage circuit 171 An arithmetic unit (phosphorus discharge amount detecting means, estimating means) 121 for estimating the phosphonic acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 using the acid phosphorus concentration data, 121 is an estimated value of the phosphoric acid phosphorus concentration meter 142 It is a regulator that outputs a signal to the inflow-anaerobic tank bypass inflow pump 13 that makes the bypass inflow sewage amount to the anaerobic tank 4 a predetermined value in accordance with the difference between the value and the target value set in the setter 131. 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 a signal line 142a. The computing unit 182 is connected to the storage circuit 171 through the signal line 171a. The regulator 121 is connected to the computing unit 182 through the signal line 182a, the setting unit 131 through the signal line 131a, and the inflow-anaerobic tank bypass inflow pump 13 through the signal line 121a. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is 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 storage circuit 171 via the signal line 142a. The computing unit 182 estimates the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time using the data of the phosphoric acid phosphorus concentration stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as a least square method. The phosphorous acid phosphorus concentration data necessary for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the calculator 182 is transmitted to the adjuster 121 via the signal line 182a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage that flows into the anaerobic tank 4 according to, for example, a formula similar to the formula (8.1) according to the difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value. Output a value signal. The output of the regulator 121 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 through the signal line 121a.

  From the 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 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 is reduced and the amount of organic matter supplied to the anaerobic tank 4 is reduced. As a result, phosphorus discharge is reduced and the amount of phosphorus removal 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 phosphoric acid phosphorus concentration data is used. Organic matter supplied to the anaerobic tank 4 by estimating the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 By adjusting the amount and keeping the phosphorus discharge amount constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to the twenty-first 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 time is required, the effect of quickly adjusting the amount of organic matter supplied to the anaerobic tank 4 can be obtained.

Embodiment 22. FIG.
FIG. 22 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 22 of the present invention. This embodiment includes a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of 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 anaerobic tank by bypass. The device is configured. In FIG. 22, 146 is a phosphoric acid phosphorus concentration meter (outflow phosphorus amount detecting means, phosphorus concentration meter) for measuring the phosphoric acid phosphorus concentration of the discharged water, 135 is a setter for setting a target value of the phosphoric acid phosphorus concentration, and 125 is The inflow-anaerobic tank bypass inflow pump 13 generates a signal that sets the bypass inflow sewage amount to the anaerobic tank 4 to a predetermined value according to the difference between the measured value of the phosphoric acid phosphorus concentration meter 146 and the target value set in the setting device 135. Is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs to The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 125 is connected to the phosphoric acid phosphorus concentration meter 146 through the signal line 146a, the setting unit 135 through the signal line 135a, and the inflow-anaerobic tank bypass inflow pump 13 through the signal line 125a. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Next, the operation will be described.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 125 via the signal line 146a. Further, the target value set in the setting device 135 is transmitted to the adjusting device 125 via the signal line 135a. According to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value, the regulator 125 determines the amount of sewage that flows into the anaerobic tank 4 according to, for example, the following equation (12.1): Output a signal.
_{Q ana = Q ana0 + K ana5} (C PO4_out -C PO4_out *) (12.1)
here,
Q _ana : Bypass inflow sewage amount to anaerobic tank 4 Q _ana0 : Constant K _ana5 : Constant (> 0)
C _{PO4_out} ^* : Target value of phosphoric acid phosphorus concentration of _effluent water C _{PO4_out} : _Measured value of phosphoric acid phosphorus concentration of _effluent water The output of the regulator 125 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via the signal line 125a. .

From the above, if the measured value C _{PO4_out} phosphorus phosphorus acid concentration is greater than the target value C _{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} of the phosphoric acid phosphorus concentration is smaller than the target value C _{PO4 — out} ^* , the bypass inflow sewage amount Q _ana to the anaerobic tank 4 decreases, and the organic substance supply amount 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 twenty-second embodiment, by measuring the phosphoric acid phosphorus concentration of the effluent water and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 23. FIG.
FIG. 23 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 23 of the present invention. This embodiment includes a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of 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 anaerobic tank by bypass. The device is configured. In FIG. 23, reference numeral 146 denotes a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent water, and 126 denotes the amount of sewage flowing into the anaerobic tank 4 according to the measured value of the phosphoric acid phosphorus concentration meter 146 to a predetermined value. It is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs a signal to the inflow-anaerobic tank bypass inflow pump 13. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 126 is connected to the phosphoric acid phosphorus concentration meter 146 via the signal line 146a and the inflow-anaerobic tank bypass inflow pump 13 via the signal line 126a. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Next, the operation will be described.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 126 via the signal line 146a. The regulator 126 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained, for example, according to the following equation (13.1) in accordance with the measured value of the phosphoric acid phosphorus concentration.
Q _ana = Q _ana0 + K _ana6 C _{PO4_out} (13.1)
here,
Q _ana : Bypass inflow sewage amount to anaerobic tank 4 Q _ana0 : Constant K _ana6 : Constant (> 0)
C _{PO4 — out} : Measured value of phosphoric acid phosphorus concentration of discharged water The output of the regulator 126 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 through the signal line 126a.

Thus, depending on whether the measured value C _{PO4_out} phosphorus phosphorus acidic concentration 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-third embodiment, the phosphoric acid phosphorus concentration of the effluent water is measured and supplied to the anaerobic tank 4 by adjusting the amount of sewage flowing into the anaerobic tank 4 according to the measured value. Since the amount of organic matter to be adjusted and the amount of phosphorus discharged are adjusted, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 24. FIG.
FIG. 24 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 24 of the present invention. This embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter that measures the amount of phosphorus flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the amount of sewage that flows into the anaerobic tank. The apparatus is configured to adjust the angle. In FIG. 24, 141 is a phosphoric acid phosphorus concentration meter (inflowing phosphorus amount detecting means, phosphorus concentration meter) for measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, and 137 is a target of the phosphoric acid phosphorus concentration of the discharged water. A setter 127 for setting a value is 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 measured value of the phosphoric acid phosphorus concentration meter 141 and the target value set in the setter 137. Is an adjuster (anaerobic tank inflow water amount adjustment signal output means) that outputs to the inflow-anaerobic tank bypass inflow pump 13. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 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. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Next, the operation will be described.
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 regulator 127 via the signal line 141a. Further, the target value set in the setting device 137 is transmitted to the adjuster 127 through the signal line 137a. According to the difference between the measured value of the phosphoric acid phosphorus concentration and the predetermined target value, the regulator 127 determines the amount of sewage that flows into the anaerobic tank 4 according to, for example, the following equation (14.1): Output a signal.
_{Q ana = Q ana0 + K ana7} (C PO4_in -C PO4_out *) (14.1)
here,
Q _ana : Bypass inflow sewage amount to anaerobic tank 4 Q _ana0 : Constant K _ana7 : Constant (> 0)
C _{PO4_out} ^* : Target value of phosphoric acid phosphorus concentration of _effluent water C _{PO4_in} : Measured value of phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 It is transmitted to the inflow pump 13.

From the above, depending on how much the measured value C _{PO4_in of} the sewage phosphoric acid phosphorus concentration flowing into the biological reaction tank 2 is larger than the target value C _{PO4_out} ^{* of the} _effluent phosphoric acid phosphorus concentration, bypass inflow to the anaerobic tank 4 The amount of sewage Q _ana 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 twenty-fourth embodiment, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference from the target value of the predetermined phosphoric acid phosphorus concentration of the discharged water. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage that flows into the anaerobic tank 4 and the amount of phosphorus discharged is adjusted, so even if the flow rate or concentration of sewage flowing from outside the system changes. An effect of reliably reducing the amount of phosphorus flowing out is obtained.

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

Embodiment 25. FIG.
FIG. 25 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 25 of the present invention. This embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter that measures the amount of phosphorus flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system, and the amount of sewage that flows into the anaerobic tank. The apparatus is configured to adjust the angle. In FIG. 25, 141 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, and 128 is a bypass inflow to the anaerobic tank 4 according to the measured value of the phosphoric acid phosphorus concentration meter 141. It is a regulator (anaerobic tank inflow water amount adjustment signal output means) for outputting a signal for setting the water amount to a predetermined value to the inflow-anaerobic tank bypass inflow pump 13. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 128 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a and to the inflow-anaerobic tank bypass inflow pump 13 via the signal line 128a. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Next, the operation will be described.
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 128 via the signal line 141a. The regulator 128 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained, for example, according to the following equation (15.1) in accordance with the measured value of the phosphoric acid phosphorus concentration.
Q _ana = Q _ana0 + K _ana8 C _{PO4_in} (15.1)
here,
Q _ana: bypass inlet sewage quantity to the anaerobic tank ₄ Q ana0: constant _K ana8: constant (> 0)
_{CPO4_in} : measured value of phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 The output of the regulator 128 is transmitted to the inflow-anaerobic tank bypass inflow pump 13 via the signal line 128a.

Thus, depending on whether the measured value C _{PO4_in} phosphorus phosphorus acidic concentration 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 phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the anaerobic tank 4 is adjusted according to the measured value. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained.

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

Embodiment 26. FIG.
FIG. 26 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 26 of the present invention. This embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration concentration of the sewage 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 anoxic tank. The apparatus is configured as described above. In FIG. 26, i is a pipe connected to the pipe b and the oxygen-free tank 5 in order to bypass a part of the sewage flowing out of the first sedimentation tank 1 into the oxygen-free tank 5, and 11 is bypassed to the oxygen-free tank 5. It is a first sedimentation-anoxic tank bypass inflow pump provided in the pipe i for adjusting the flow rate of the inflowing sewage.

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of 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, and 121 is a phosphoric acid phosphorus concentration meter. In response to the difference between the measured value 142 and the target value set in the setting device 131, a signal is output to the initial settling-anoxic tank bypass inflow pump 11 to set the amount of sewage flowing into the anoxic tank 5 to a predetermined value. It is a regulator to do. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The regulator 121 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a, the setter 131 via the signal line 131a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 121a. Yes.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is 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 regulator 121 via the signal line 142a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage that flows into the anoxic tank 5 according to, for example, the following equation (16.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output.
_{Q ano = Q ano0 + K ano8} (C PO4_ana -C PO4_ana *) (16.1)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano8 : Constant (> 0)
C _{PO4_ana} ^* : Target value of phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 C _{PO4_ana} : Measurement value of phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 The output of the regulator 121 is a signal. It is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the line 121a.

Than, 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 _ano increases, organic feed to the anoxic tank 5 to anoxic tank 5 is increased by more than To do. As a result, the denitrification reaction becomes active and the amount of nitrogen removal 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 sewage water Q _ano flowing into the anaerobic tank 5 decreases, and the amount of organic matter supplied to the anaerobic tank 5 decreases. To do. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed 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 concentration to the anaerobic tank 5 is determined according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, the remaining organic matter is supplied to the anaerobic tank 5 while supplying the amount of organic matter necessary for phosphorus discharge to the anaerobic tank 4. Even when the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out of the system can be surely reduced and the amount of nitrogen can be reduced.

Embodiment 27. FIG.
FIG. 27 is a block diagram showing a control apparatus for 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 the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, and adjusts the amount of sewage flowing into the anoxic tank by bypass. The apparatus is configured as follows. In FIG. 27, 152 is a redox potential meter that measures the redox potential of sewage in the mixed solution in the anaerobic tank 4, 132 is a setter that sets the target value of the redox potential, and 122 is the redox potential meter 152. Adjustment that outputs a signal that sets the amount of sewage flowing into the anoxic tank 5 to a predetermined value according to the difference between the measured value and the target value set in the setting device 132 to the initial settling-anoxic tank bypass inflow pump 11 It is a vessel. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The regulator 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 initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 122a. . The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The oxidation-reduction potential of the sewage in the mixed liquid in the anaerobic tank 4 is measured by the oxidation-reduction potentiometer 152, and the measured value is transmitted to the regulator 122 via the signal line 152a. Further, the target value set in the setting device 132 is transmitted to the adjuster 122 through the signal line 132a. The regulator 122 determines the amount of sewage flowing into the anoxic tank 5 according to, for example, the following formula (17.1) according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. 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 Q _ano0 : Constant K _ano9 : Constant (<0)
V _ana ^* : target value of redox potential of sewage in the mixed solution in the anaerobic tank 4 V _ana : measured value of redox potential of sewage in the mixed liquid in the anaerobic tank 4 The output of the regulator 122 is a signal line 122a. Is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11.

From the above, if the measured value V _ana of the oxidation-reduction potential is smaller than the target value V _ana ^* , the bypass inflow sewage amount Q _ano to the anoxic tank 5 increases and the organic matter supply amount to the anoxic tank 5 increases. . As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the contrary, if the measured value V _ana of the oxidation-reduction potential is larger than the target value V _ana ^* , the bypass inflow sewage amount Q _ano to the anoxic tank 5 decreases and the organic substance supply amount to the anoxic tank 5 decreases. . As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

  As described above, according to the twenty-seventh embodiment, the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4 is measured and bypassed to the anaerobic tank 5 according to the difference from a predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of inflow sewage, the remaining organic matter is supplied to the anaerobic tank 5 while supplying the amount of organic matter required for phosphorus discharge to the anaerobic tank 4. Even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system and to reduce the amount of nitrogen.

Embodiment 28. FIG.
FIG. 28 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 28 of the present invention. This embodiment includes a phosphorus content measuring device for measuring the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the anoxic tank is measured 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 mixed solution in the anaerobic tank 4, 133 is a setting device for setting a target value of the phosphorus content, and 123 is the phosphorus content. A signal that sets the bypass inflow sewage amount to the anaerobic tank 5 to a predetermined value in accordance with the difference between the measured value of the measuring instrument 162 and the target value set in the setting unit 133 is the initial settling-anoxic tank bypass inflow pump 11. It is a controller that outputs to The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The regulator 123 is connected to the phosphorus content measuring device 162 through the signal line 162a, the setting device 133 through the signal line 133a, and the initial sedimentation-anoxic tank bypass inflow pump 11 through the signal line 123a. Yes. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured by the phosphorus content measuring device 162, and the measured value is transmitted to the regulator 123 via the signal line 162a. Further, the target value set in the setting unit 133 is transmitted to the adjuster 123 via the signal line 133a. The regulator 123 sets the amount of sewage that flows into the anaerobic tank 4 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)
here,
Q _ano : amount of sewage flowing into the anoxic tank 5 Q _ano0 : constant K _ano10 : constant (> 0)
P _{acm_ana} ^* : Target value of phosphorus content of phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 _{Pa cm_ana} : Measurement value of phosphorus content of phosphorus accumulating bacteria in the mixture in the anaerobic tank 4 Output of the regulator 123 Is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 through the signal line 123a.

From the above, if the phosphorus content of the measured value P _{Acm_ana} is greater target value _P acm_ana ^* than the 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 amount of nitrogen removal 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 amount of nitrogen removed decreases.

  As described above, according to the twenty-eighth embodiment, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the oxygen content is transferred to the anaerobic tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, the remaining organic matter is supplied to the anaerobic tank 5 while supplying the amount of organic matter required for phosphorus discharge to the anaerobic tank 4 Even when the flow rate or concentration of sewage flowing from outside the system changes, it is possible to reliably reduce the amount of phosphorus flowing out of the system and to reduce the amount of nitrogen.

Embodiment 29. FIG.
FIG. 29 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 29 of the present invention. This embodiment is a device for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank as means for detecting the phosphorus discharge amount. Provided, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank. In FIG. 29, 142 is a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4, and 141 is a phosphoric acid acid that measures the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2. A phosphorus concentration meter 181 is a calculator for calculating 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, and 134 is the calculator A setting unit 124 for setting a target value of a difference between the phosphoric acid phosphorus concentration of sewage in the mixed liquid and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2, is calculated by the calculation value of the calculation unit 181 and the setting unit 134. This is a regulator that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value according to the difference from the set target value, to the initial settling-anoxic tank bypass inflow pump 11. 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 computing unit 181 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The regulator 124 is connected to the computing unit 181 through the signal line 181a, the setting unit 134 through the signal line 134a, and the initial sedimentation-anoxic tank bypass inflow pump 11 through the signal line 124a. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the calculator 181 via the signal line 141a. The calculator 181 calculates the difference between the phosphorous phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 according to, for example, the following equation (19.1). To do.
D _{PO4_ana_in} = C _{PO4_ana} −C _{PO4_in} (19.1)
here,
D _{PO4_ana_in} : Calculated value of the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 C _{PO4_ana} : Sewage in the mixed solution in the anaerobic tank 4 Phosphoric acid phosphorus concentration _{CPO4_in of} sewage water flowing into the biological reactor 2

The calculated value of the calculator 181 is transmitted to the adjuster 124 through the signal line 181a. Further, the target value set in the setting unit 134 is transmitted to the adjuster 124 through the signal line 134a. The regulator 124 calculates the difference between the phosphoric phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 and a predetermined target value. Depending on the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 5 to a value obtained, for example, according to the following equation (19.2).
Q _ano = Q _ano0 + K _ano11 (D _{PO4_ana_in} −D _{PO4_ana_in} ^* ) (19.2)
here,
Q _ano : amount of sewage flowing into the anoxic tank 5 Q _ano0 : constant K _ano11 : constant (> 0)
D _{PO4_ana_in} ^* : Target value of the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 D _{PO4_ana_in} : In the mixed solution in the anaerobic tank 4 Calculated value of difference between phosphoric acid phosphorus concentration of sewage and phosphoric acid phosphorus concentration of sewage flowing into biological reaction tank 2 The output of the regulator 124 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via a signal line 124a. It is done.

From the above, if the calculated value D _{PO4_ana_in} of the difference between the phosphorous phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration flowing into the biological reaction tank 2 is larger than the target value D _{PO4_ana_in} ^* The amount of sewage _Qano flowing into the anoxic tank 5 is increased, and the amount of organic matter supplied to the anoxic tank 5 is increased. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the contrary, if the calculated value D _{PO4_ana_in} 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 D _{PO4_ana_in} ^* The amount of sewage water _Qano bypassed into the anaerobic tank 5 decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. 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 phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 are measured. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the calculated value of the difference and a predetermined target value, it is necessary for the phosphorus discharge. While supplying the amount of organic matter to the anaerobic tank 4, surplus organic matter can be supplied to the anaerobic tank 5, and even if the flow rate and concentration of sewage flowing from outside the system fluctuate, It is possible to reliably reduce the amount of nitrogen and to reduce the amount of nitrogen.

Embodiment 30. FIG.
FIG. 30 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 30 of the present invention. This embodiment is provided with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, and the apparatus is configured to adjust the amount of sewage flowing into the anoxic tank. Is configured. In FIG. 30, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of 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, and 171 is an anaerobic tank 4. A storage circuit 182 stores the phosphoric acid phosphorus concentration data of the sewage in the mixed solution in the inside, and the phosphorus of the sewage in the mixed solution in the anaerobic tank 4 using the data of the phosphorous phosphorus concentration stored in the storage circuit 171. An arithmetic unit 121 for estimating the acidic phosphorus concentration is a predetermined value for the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value of the phosphoric acid phosphorus concentration meter 142 and the target value set in the setting unit 131. Is a regulator that outputs a signal to the initial settling-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 a signal line 142a. The computing unit 182 is connected to the storage circuit 171 through the signal line 171a. The regulator 121 is connected to the computing unit 182 via the signal line 182a, the setting unit 131 via the signal line 131a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 121a. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The phosphoric acid phosphorus concentration 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 computing unit 182 estimates the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time using the data of the phosphoric acid phosphorus concentration stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as a least square method. The phosphorous acid phosphorus concentration data necessary for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the calculator 182 is transmitted to the adjuster 121 via the signal line 182a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage that flows into the anaerobic tank 5 according to, for example, an equation similar to the equation (16.1) according to the difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value. Output a signal with the value obtained. The output of the regulator 121 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 121a.

  From the 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 increases, and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the contrary, 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 is reduced and the amount of organic matter supplied to the anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed 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 in the anaerobic tank 4. Estimate the phosphoric acid phosphorus concentration of sewage in the mixed liquid and supply it to the anaerobic tank 5 by adjusting the amount of sewage flowing into the anaerobic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter to be adjusted is adjusted, the amount of organic matter necessary for discharging phosphorus can be supplied to the anaerobic tank 4 while surplus organic matter can be supplied to the anaerobic tank 5, and the flow rate and concentration of sewage flowing from outside the system can be controlled. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system and to reduce the amount of nitrogen.
In addition, 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 time is required, an effect of quickly adjusting the amount of organic matter supplied to the oxygen-free tank 5 can be obtained.

Embodiment 31. FIG.
FIG. 31 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 31 of the present invention. This embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water 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 bypass. The apparatus is configured as follows. In FIG. 31, 146 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the discharged water, 135 is a setting device for setting a target value of the phosphoric acid phosphorus concentration, and 125 is a measurement value and setting of the phosphoric acid phosphorus concentration meter 146. It is a regulator that outputs a signal that sets the amount of sewage flowing into the anoxic tank 5 to a predetermined value according to the difference from the target value set in the vessel 135 to the initial settling-anoxic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 125 is connected to the phosphoric acid phosphorus concentration meter 146 via the signal line 146a, the setting device 135 via the signal line 135a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 125a. Yes. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 125 via the signal line 146a. Further, the target value set in the setting device 135 is transmitted to the adjusting device 125 via the signal line 135a. The regulator 125 obtains the amount of sewage flowing into the anoxic tank 5 according to, for example, the following equation (20.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output.
Q _ano = Q _ano0 + K _ano12 (C _{PO4_out} −C _{PO4_out} ^* ) (20.1)
here,
Q _ano : amount of sewage flowing into the anoxic tank 5 Q _ano0 : constant K _ano12 : constant (<0)
C _{PO4_out} ^* : Target value of phosphoric acid phosphorus concentration of _effluent water C _{PO4_out} : Measurement value of phosphoric acid phosphorus concentration of _effluent water Reportedly.

Than, 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 _ano increases, organic feed to the anoxic tank 5 to anoxic tank 5 is increased by more than To do. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the measured value C _{PO4_out} phosphorus phosphorus acid concentration is greater than the target value C _{PO4_out} ^*, bypass inlet sewage quantity Q _ano to anoxic tank 5 is reduced, organic feed to anoxic tank 5 is reduced To do. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.

  As described above, according to this Embodiment 31, the phosphoric acid phosphorus concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, the remaining organic matter can be supplied to the anaerobic tank 5 while supplying the amount of organic matter required for phosphorus discharge to the anaerobic tank 4 and flows from outside the system. Even when the flow rate or concentration of the sewage is changed, it is possible to reliably reduce the amount of phosphorus flowing out of the system and to reduce the amount of nitrogen.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 32. FIG.
FIG. 32 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 32 of the present invention. This embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water 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 bypass. The apparatus is configured as follows. In FIG. 32, 146 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the discharged water, and 126 is a predetermined value for the amount of sewage flowing into the anoxic tank 5 according to the measured value of the phosphoric acid phosphorus concentration meter 146. Is a regulator that outputs a signal to the initial settling-anoxic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 126 is connected to the phosphoric acid phosphorus concentration meter 146 via the signal line 146a and to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 126a. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 126 via the signal line 146a. The regulator 126 outputs a signal that sets the amount of sewage flowing into the anoxic tank 5 to a value obtained, for example, according to 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)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano13 : Constant (<0)
C _{PO4 — out} : Measured value of the phosphoric acid phosphorus concentration of the discharged water The output of the regulator 126 is transmitted to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 126a.

From the above, depending on whether the measured value C _{PO4_out} phosphorus phosphorus acidic concentration 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 nitrogen removal amount increases or decreases.

  As described above, according to the thirty-second embodiment, the anaerobic tank 5 is measured by measuring the phosphoric acid phosphorus concentration of the discharged water and adjusting the amount of sewage flowing into the anoxic tank 5 according to the measured value. Since the amount of organic matter supplied to the tank is adjusted, the amount of organic matter necessary for discharging the phosphorus can be supplied to the anaerobic tank 4 while surplus organic matter can be supplied to the anaerobic tank 5, and the flow rate of sewage flowing from outside the system Even when the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system and to reduce the amount of nitrogen.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 33. FIG.
FIG. 33 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 33 of the present invention. This embodiment includes a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The apparatus is configured to adjust the amount of water. In FIG. 33, 141 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, 137 is a setter for setting a target value of the phosphoric acid phosphorus concentration of the discharged water, and 127 is phosphoric acid. A signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value according to the difference between the measured value of the phosphorus concentration meter 141 and the target value set in the setting device 137 is a primary sink-anoxic tank bypass inflow pump. 11 is an adjuster that outputs to 11. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 127 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a, the setter 137 via the signal line 137a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 127a. Yes. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
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 regulator 127 via the signal line 141a. Further, the target value set in the setting device 137 is transmitted to the adjuster 127 through the signal line 137a. The regulator 127 obtains the amount of sewage that flows into the anoxic tank 5 according to, for example, the following equation (22.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output.
Q _ano = Q _ano0 + K _ano14 (C _{PO4_in} −C _{PO4_out} ^* ) (22.1)
here,
Q _ano : amount of sewage flowing into the anoxic tank 5 Q _ano0 : constant K _ano14 : constant (<0)
C _{PO4_out} ^* : Target value of phosphoric acid phosphorus concentration of _effluent water C _{PO4_in} : Measured value of phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 The output of the regulator 127 is first precipitated-oxygen-free via a signal line 127a. It is transmitted to the tank bypass inflow pump 11.

From the above, depending on how much the measured value C _{PO4_in of} the sewage phosphoric acid phosphorus concentration flowing into the biological reaction tank 2 is larger than the target value C _{PO4_out} ^{* of the} discharged water phosphoric acid phosphorus concentration, the bypass to the anoxic tank 5 The inflow sewage amount _Qano increases or decreases, and the organic substance supply amount to the anoxic tank 5 increases or decreases. As a result, the nitrogen removal amount increases or decreases.

  As described above, according to the thirty-third embodiment, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and according to the difference from the target value of the predetermined phosphoric acid phosphorus concentration of the discharged water. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anaerobic tank 5, the amount of organic matter necessary for discharging the phosphorus is supplied to the anaerobic tank 4, and the remaining organic matter is eliminated. Even if the flow rate or concentration of sewage flowing from the outside of 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 from outside the system is detected by measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, but the apparatus is configured to measure the total phosphorus concentration. May be.

Embodiment 34. FIG.
FIG. 34 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 34 of the present invention. This embodiment includes a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The apparatus is configured to adjust the amount of water. In FIG. 34, 141 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of 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. It is a regulator that outputs a signal that sets the amount of sewage to a predetermined value to the initial sedimentation-anoxic tank bypass inflow pump 11. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 128 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a and to the initial sedimentation / anoxic tank bypass inflow pump 11 via the signal line 128a. The other components are the same as or equivalent to those shown in FIG. 26 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
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 128 via the signal line 141a. The regulator 128 outputs a signal for setting the amount of sewage flowing into the anoxic tank 5 to a value obtained, for example, according to the following equation (23.1) in accordance with the measured value of the phosphoric acid phosphorus concentration.
Q _ano = Q _ano0 + K _ano15 C _{PO4_in} (23.1)
here,
Q _ano : The amount of sewage flowing into the anoxic tank 5 Q _ano0 : Constant K _ano15 : Constant (<0)
_{CPO4_in} : measured value of phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 The output of the regulator 128 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 128a.

From the above, depending on whether the measured value C _{PO4_in} phosphorus phosphorus acidic concentration 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 nitrogen removal amount increases or decreases.

  As described above, according to the thirty-fourth embodiment, the phosphoric acid phosphorus concentration of sewage 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. Therefore, the amount of organic matter supplied to the anaerobic tank 5 is adjusted, so that the extra organic matter can be supplied to the anaerobic tank 5 while supplying the amount of organic matter necessary for the discharge of phosphorus to the anaerobic tank 4. Even when the flow rate or concentration of the inflowing sewage varies, it is possible to reliably reduce the amount of phosphorus flowing out of the system and to reduce the amount of nitrogen.

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

Embodiment 35. FIG.
FIG. 35 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 35 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration meter in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, and the flow rate of the sewage flowing into the first sedimentation basin. The apparatus is configured to adjust (hereinafter referred to as the amount of sewage flowing into the first sedimentation basin). In FIG. 35, reference numeral 14 denotes an initial settling tank inflow pump (first settling tank inflow water amount adjusting means) provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of 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, and 121 is a phosphoric acid phosphorus concentration meter. The controller outputs a signal to the first settling basin inflow pump 14 according to the difference between the measured value 142 and the target value set in the setter 131 to set the amount of sewage flowing into the first settling basin 1 to a predetermined value. . The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The regulator 121 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a, the setter 131 via the signal line 131a, and the first settling tank inflow pump 14 via the signal line 121a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 regulator 121 via the signal line 142a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (8.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the regulator 121 is first transmitted to the settling tank inflow pump 14 via the signal line 121a.

  From the above, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the flow rate of sewage flowing out from the first settling basin 1 and flowing into the anaerobic tank 4 is increased by increasing the amount of sewage flowing into the first settling basin 1. (Hereinafter, 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. On the contrary, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the settling basin 1 is decreased first, so that the amount of sewage flowing into the anaerobic tank 4 is decreased, Organic 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 sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured The effect which can be reduced is acquired. Furthermore, according to this Embodiment 35, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first sedimentation tank 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 36. FIG.
FIG. 36 is a block diagram showing a control apparatus for 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. The device is configured to adjust. In FIG. 36, each component is the same as or equivalent to that shown with the same reference numeral in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) 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 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 36, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first settling basin 1 according to the difference with the predetermined target value By adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of easily decomposable organic matter supplied to the anaerobic tank 4, the amount of phosphorus discharged is kept constant. Even when the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 37. FIG.
FIG. 37 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 37 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. 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.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to the thirty-seventh embodiment, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system is obtained. Furthermore, according to this Embodiment 37, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first sedimentation tank 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 38 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. The device is configured to adjust. In FIG. 38, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to 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 mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to the thirty-eighth embodiment, the sewage phosphoric acid phosphorus concentration in the mixed liquid in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 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, so the flow rate and concentration of 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 39. FIG.
FIG. 39 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 39 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. 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.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 39, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 39, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 according to the difference from 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 the amount of phosphorus discharged is kept constant, so the amount and concentration of 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 this embodiment, the amount of nitrogen flowing out from the biological water treatment apparatus is detected by measuring the nitrate nitrogen concentration of the effluent water, but the total nitrogen concentration is measured instead of the nitrate nitrogen concentration. The apparatus may be configured as described above.

Embodiment 40. FIG.
40 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 40 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. The device is configured to adjust. In FIG. 40, each component is the same as or equivalent to that shown with the same reference numerals in FIGS.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 40, the concentration of nitrate nitrogen in effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 40, 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 settling basin 1 according to the difference from 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration.

Embodiment 41. FIG.
FIG. 41 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 41 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. 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.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to the forty-first embodiment, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 41, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 according to the difference from 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the influent water, but the apparatus may be configured to measure the ammoniacal nitrogen concentration.

Embodiment 42. FIG.
FIG. 42 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 42 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 from outside the system, The apparatus is configured to adjust the amount of water. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution in the anaerobic tank as means for detecting the phosphorus discharge amount, and the amount of sewage flowing into the first sedimentation basin is measured. 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.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 35, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 42, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 42, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first sedimentation tank 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 43. FIG.
FIG. 43 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 43 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 basin. The apparatus is configured as described above. In FIG. 43, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Reference numeral 152 denotes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, 132 denotes a setter that sets a target value of the oxidation-reduction potential, and 122 denotes a measurement value of the oxidation-reduction potentiometer 152. This is a regulator that outputs a signal to the first settling tank inflow pump 14 that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the difference between and the target value set in the setter 132. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The regulator 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 initial sedimentation tank inflow pump 14 via the signal line 122a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 liquid in the anaerobic tank 4 is measured by the oxidation-reduction potentiometer 152, and the measured value is transmitted to the regulator 122 via the signal line 152a. Further, the target value set in the setting device 132 is transmitted to the adjuster 122 through the signal line 132a. The regulator 122 determines the amount of sewage flowing into the anaerobic tank 4 according to a formula similar to the formula (9.1), for example, according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. Output a signal. The output of the regulator 122 is first transmitted to the settling tank inflow pump 14 via the signal line 122a.

  From the above, if the measured value of the oxidation-reduction potential is larger than the target value, the amount of sewage flowing into the first sedimentation basin 1 will increase, so that the amount of sewage flowing into the anaerobic tank 4 will increase and the organic matter to the anaerobic tank 4 will increase. Supply volume increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the other hand, if the measured value of the oxidation-reduction potential is smaller than the target value, the amount of sewage flowing into the anaerobic tank 4 is reduced due to a decrease in the amount of sewage flowing into the settling tank 1 at first, and organic matter entering the anaerobic tank 4 is reduced. Supply volume decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

  As described above, according to this Embodiment 43, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 43, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 44. FIG.
FIG. 44 is a block diagram showing a control apparatus for 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 basin. The apparatus is configured as described above. In FIG. 44, each component is the same as or equivalent to that indicated by the same reference numeral in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 44, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 is measured, and the bypass flows into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Furthermore, according to this Embodiment 44, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from the predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 45. FIG.
FIG. 45 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 45 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 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.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 45, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 45, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from the predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 46. FIG.
46 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 46 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 basin. The apparatus is configured as described above. In FIG. 46, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 46, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 46, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from the predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 47. FIG.
FIG. 47 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 47 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 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.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 47, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 47, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 48. FIG.
FIG. 48 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 48 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 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.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 48, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 48, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from the predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 49. FIG.
FIG. 49 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 49 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 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.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 49, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and an oxygen-free is determined according to the difference between the predetermined total nitrogen concentration of the discharged water and the 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 tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 49, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the influent water, but the apparatus may be configured to measure the ammoniacal nitrogen concentration.

Embodiment 50. FIG.
50 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 50 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment includes a redox potentiometer that measures the redox potential of sewage 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 basin. The apparatus is configured as described above. In FIG. 50, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 15 and 43, and a detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 43, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (9.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 50, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 50, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 51. FIG.
FIG. 51 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 51 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration in the liquid mixture in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free 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 apparatus is configured as follows. In FIG. 51, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 162 is a phosphorus content measuring device for measuring the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4, 133 is a setting device for setting a target value of the phosphorus content, and 123 is a phosphorus content measuring device. The controller outputs a signal to the first settling basin inflow pump 14 according to the difference between the measured value 162 and the target value set in the setter 133, with a predetermined value for the amount of sewage flowing into the first settling basin 1. . The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The regulator 123 is connected to the phosphorus content measuring device 162 through the signal line 162a, the setting device 133 through the signal line 133a, and the initial sedimentation tank inflow pump 14 through 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 detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 mixed solution in the anaerobic tank 4 is measured by the phosphorus content measuring device 162, and the measured value is transmitted to the regulator 123 via the signal line 162a. Further, the target value set in the setting unit 133 is transmitted to the adjuster 123 via the signal line 133a. The regulator 123 determines the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (10.1) according to the difference between the measured value of the phosphorus content and a predetermined target value. Output a signal. The output of the regulator 123 is first transmitted to the settling tank inflow pump 14 via the signal line 123a.

  From the above, if the measured value of the phosphorus content is smaller than the target value, the inflow sewage amount to the anaerobic tank 4 is increased by increasing the inflow sewage amount to the first settling basin 1, and the organic matter to the anaerobic tank 4 is increased. Supply volume increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphorus content is larger than the target value, the amount of sewage flowing into the anaerobic tank 4 will decrease due to a decrease in the amount of sewage flowing into the settling basin 1 at first. Supply volume decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

  As described above, according to the embodiment 51, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this embodiment 51, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the first inflow into the settling basin 1 according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.

Embodiment 52. FIG.
FIG. 52 is a block diagram showing a control apparatus for a 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 52, each component is the same as or equivalent to that shown in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 52, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 is measured, and the bypass flows into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Further, according to this embodiment 52, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the first inflow into the settling basin 1 is determined according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.

Embodiment 53. FIG.
FIG. 53 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 53 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 53, each component is the same as or equivalent to that shown in FIG. 5 and FIG.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to Embodiment 53, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 53, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first sedimentation basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.

Embodiment 54. FIG.
FIG. 54 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 54 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 54, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 54, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to measure the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 54, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the first inflow into the settling basin 1 is determined according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.

Embodiment 55. FIG.
FIG. 55 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 55 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 55, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 9 and 51, and the detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 55, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 55, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first settling basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration.

Embodiment 56. FIG.
FIG. 56 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 56 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 56, each component is the same as or equivalent to that shown in FIG. 11 and FIG.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 56, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Further, according to the embodiment 56, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first settling basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration.

Embodiment 57. FIG.
FIG. 57 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 57 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 from outside the system, and the amount of sewage flowing into the anoxic tank by bypass. The apparatus is configured to adjust the angle. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 57, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 13 and 51, and the detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 57, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 57, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first sedimentation basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 58. FIG.
FIG. 58 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 58 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped 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 the amount of sewage flowing into the first sedimentation basin The apparatus is configured to adjust the angle. In FIG. 58, each component is the same as or equivalent to that shown in FIG. 15 and FIG.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 51, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an expression similar to the expression (10.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 58, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 58, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the first inflow into the settling basin 1 according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 59. FIG.
FIG. 59 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 59 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is an apparatus for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus discharged. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 59, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of sewage in the mixed solution in the anaerobic tank 4, and 141 is a phosphoric acid phosphorus concentration for measuring the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2. 181 is a computing unit that calculates the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, and 134 is the mixing in the anaerobic tank 4. A setter 124 for setting a target value of the difference between the phosphoric acid phosphorus concentration of sewage in the liquid and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is set in the calculation value of the calculator 181 and the setter 134. It is a regulator that outputs a signal to the first settling tank inflow pump 14 that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value in accordance with the difference from the target value. 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 computing unit 181 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The regulator 124 is connected to the computing unit 181 via the signal line 181a, the setting unit 134 via the signal line 134a, and the first settling tank inflow pump 14 via the signal line 124a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the calculator 181 via the signal line 141a. The calculator 181 calculates the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed liquid in the anaerobic tank 4 and the phosphorous phosphorus concentration of the sewage flowing into the biological reaction tank 2 according to, for example, the formula (11.1).

  The calculated value of the calculator 181 is transmitted to the adjuster 124 through the signal line 181a. Further, the target value set in the setting unit 134 is transmitted to the adjuster 124 through the signal line 134a. The regulator 124 calculates the difference between the phosphoric phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 and a predetermined target value. In response to the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 4 according to a formula similar to the formula (11.2), for example. The output of the regulator 124 is first transmitted to the settling tank inflow pump 14 via a signal line 124a.

  From the above, if the calculated value of the difference between the phosphorous phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of the sewage flowing into the biological reaction tank 2 is smaller than the target value, the first sedimentation tank 1 As the amount of sewage flowing into the water 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 and the amount of phosphorus removal increases. Conversely, 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 larger than the target value, the first sedimentation tank 1 As the amount of sewage flowing into the water 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, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

  As described above, according to the embodiment 59, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 59, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 60. FIG.
FIG. 60 is a block diagram showing a control apparatus for a 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment calculates the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed liquid in the anaerobic tank and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 as means for detecting the amount of phosphorus discharged. It is equipped with a device, and the device is configured to adjust the amount of sewage flowing into the first settling basin. 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.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) is first output to the settling tank inflow pump 14.

  As described above, according to the sixty-sixth embodiment, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 is measured, and the bypass flows into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Furthermore, according to this Embodiment 60, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 61. FIG.
61 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 61 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is a device for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank as means for detecting the phosphorus discharge amount. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 61, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 5 and 59, and a detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) is first output to the settling tank inflow pump 14.

  As described above, according to Embodiment 61, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 61, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture in the anaerobic tank 4 and the phosphoric 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 62. FIG.
FIG. 62 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 62 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is an apparatus for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus discharged. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 62, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) is first output to the settling tank inflow pump 14.

  As described above, according to this Embodiment 62, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 62, the phosphoric acid phosphorus concentration of the sewage in the mixed liquid 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

Embodiment 63. FIG.
FIG. 63 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 63 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is an apparatus for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus discharged. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 63, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 9 and 59, and the detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) 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 discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 63, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 and the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 are measured, and the calculation of those difference is carried out. The amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 64. FIG.
FIG. 64 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 64 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is an apparatus for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus discharged. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 64, each component is the same as or equivalent to that shown in FIG. 11 and FIG.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) is first output to the settling tank inflow pump 14.

  As described above, according to this Embodiment 64, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 64, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 65. FIG.
FIG. 65 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 65 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is an apparatus for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus discharged. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 65, each component is the same as or equivalent to that shown in FIG. 13 and FIG.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 65, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and an oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 65, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 66. FIG.
FIG. 66 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 66 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is an apparatus for calculating the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank as means for detecting the amount of phosphorus discharged. And the apparatus is configured to adjust the amount of sewage flowing into the settling basin first. In FIG. 66, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 15 and 59, and therefore detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 59, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained in accordance with an expression similar to the expression (11.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 66, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 66, 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 settling basin 1 in accordance with the difference between the value and the predetermined target value, and the phosphorus discharge rate is kept constant. Even when the amount and concentration of sewage flowing in from the water fluctuate, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  In the present embodiment, the amount of nitrogen flowing from outside the system is detected by measuring the total nitrogen concentration of the influent water, but the apparatus may be configured to measure the ammoniacal nitrogen concentration.

Embodiment 67. FIG.
FIG. 67 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 67 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 67, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a for adjusting the flow rate of sewage flowing into the initial settling tank 1.

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of 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, and 171 is the inside of the anaerobic tank 4. A storage circuit 182 stores data on the phosphoric acid phosphorus concentration of sewage in the mixed solution, and the phosphorous phosphorus of sewage in the mixed solution in the anaerobic tank 4 using the data on the concentration of phosphoric acid phosphorus stored in the storage circuit 171. An arithmetic unit 121 for estimating the concentration is a signal that sets the amount of sewage flowing into the settling basin 1 to a predetermined value according to the difference between the estimated value of the phosphoric acid phosphorus concentration meter 142 and the target value set in the setting unit 131. Is the controller that outputs the first to the settling tank inflow pump 14. 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 a signal line 142a. The computing unit 182 is connected to the storage circuit 171 through the signal line 171a. The regulator 121 is connected to the computing unit 182 through the signal line 182a, the setting unit 131 through the signal line 131a, and the first sedimentation tank inflow pump 14 through the signal line 121a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 computing unit 182 estimates the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time using the data of the phosphoric acid phosphorus concentration stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as a least square method. The phosphorous acid phosphorus concentration data necessary for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the calculator 182 is transmitted to the adjuster 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 regulator 121 via the signal line 131a. The regulator 121 obtains the amount of sewage flowing into the first settling basin 1 according to, for example, a formula similar to the formula (8.1) according to the difference between the estimated value of the phosphoric acid phosphorus concentration and a predetermined target value. Output a value signal. The output of the regulator 121 is first transmitted to the settling tank inflow pump 14 via the signal line 121a.

  From the above, if the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, the inflow sewage amount to the anaerobic tank 4 is increased by increasing the inflow sewage amount to the settling basin 1 at first. Increase organic supply. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the first settling basin 1 is decreased, the amount of sewage flowing into the anaerobic tank 4 is decreased, and the amount of sewage flowing into the anaerobic tank 4 is reduced. Organic supply is reduced. As a result, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

  As described above, according to the embodiment 67, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Further, according to the embodiment 67, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data is used in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

Embodiment 68. FIG.
FIG. 68 is a block diagram showing a control apparatus for 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 68, each component is the same as or equivalent to that shown in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to Embodiment 68, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 is measured, and the bypass flow into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Furthermore, according to this embodiment 68, 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 in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

Embodiment 69. FIG.
FIG. 69 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 69 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 69, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 69, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if 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 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 in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

Embodiment 70. FIG.
FIG. 70 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 70 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 70, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 70, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 70, 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 in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

Embodiment 71. FIG.
71 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 71 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 71, each component is the same as or equivalent to that shown in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) 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 water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to the embodiment 71, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data is used in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

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

Embodiment 72. FIG.
FIG. 72 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 72 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 72, each component is the same as or equivalent to that shown with the same reference numeral in FIGS.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) 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 effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to the embodiment 72, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data is used in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

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

Embodiment 73. FIG.
FIG. 73 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 73 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 73, each component is the same as or equivalent to that shown by attaching the same reference numeral in FIGS. 13 and 67, and the detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 73, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free is determined according to the difference between the predetermined total nitrogen concentration of the discharged water and the 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 tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 73, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 74. FIG.
FIG. 74 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 74 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank. The apparatus is configured to adjust the angle. Furthermore, this embodiment is equipped with a device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid in the anaerobic tank as means for detecting the phosphorus discharge amount, so as to adjust the amount of sewage flowing into the first settling basin. The device is configured. In FIG. 74, each component is the same as or equivalent to that shown with the same reference numeral in FIGS. 15 and 67, and a detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 67, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (8.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 74, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to the embodiment 74, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data is used in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.

  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 device is used to measure the ammoniacal nitrogen concentration. It may be configured.

Embodiment 75. FIG.
FIG. 75 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 75 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 75, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 146 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the discharged water, 135 is a setting device for setting a target value of the phosphoric acid phosphorus concentration, and 125 is a measurement value and setting device 135 for the phosphoric acid phosphorus concentration meter 146. Is a regulator that outputs a signal to the first settling tank inflow pump 14 that sets 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 to. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 125 is connected to the phosphoric acid phosphorus concentration meter 146 via the signal line 146a, the setting unit 135 via the signal line 135a, and the first settling tank inflow pump 14 via the signal line 125a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 125 via the signal line 146a. Further, the target value set in the setting device 135 is transmitted to the adjusting device 125 via the signal line 135a. The regulator 125 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (12.1) in accordance with the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the regulator 125 is first transmitted to the settling tank inflow pump 14 via the signal line 125a.

  From the above, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the inflow sewage amount to the anaerobic tank 4 is increased by increasing the inflow sewage amount to the settling basin 1 at the beginning. Increase organic supply. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the first settling basin 1 is decreased, so that the amount of sewage flowing into the anaerobic tank 4 is decreased and the amount of sewage flowing into the anaerobic tank 4 is decreased. Organic supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

  As described above, according to this embodiment 75, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 75, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the first settling basin 1 is adjusted according to the difference with the predetermined target value, and the anaerobic tank 4 is set. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 76. FIG.
FIG. 76 is a block diagram showing a control apparatus for a 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling 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.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 76, the oxidation-reduction potential in the liquid mixture in the oxygen-free tank 5 is measured, and the bypass flows into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Further, according to this embodiment 76, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the settling basin 1 is adjusted according to the difference from the predetermined target value to the anaerobic tank 4. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 77. FIG.
FIG. 77 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 77 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 77, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 5 and 75, and a detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 77, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the discharged water are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Further, according to this embodiment 77, the phosphoric acid phosphorus concentration of the effluent water is measured, the amount of sewage flowing into the first settling basin 1 is adjusted according to the difference from the predetermined target value, and the effluent is fed to the anaerobic tank 4. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 78. FIG.
78 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 78 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 78, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 7 and 75, and therefore detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) is first output to the settling tank inflow pump 14.

  As described above, according to this Embodiment 78, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 78, the phosphoric acid phosphorus density | concentration of effluent water is measured, the amount of inflow sewage to the first settling basin 1 is adjusted according to the difference with the predetermined target value, and it enters into the anaerobic tank 4 By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 79.
FIG. 79 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 79 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 79, each component is the same as or equivalent to that denoted by the same reference numeral in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 79, the concentration of nitrate nitrogen in the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 79, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the settling basin 1 is adjusted according to the difference from the predetermined target value to the anaerobic tank 4. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

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

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

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) is first output to the settling tank inflow pump 14.

  As described above, according to this Embodiment 80, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 80, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the difference with the predetermined target value, the amount of inflow sewage to the first settling tank 1 is adjusted first, and the anaerobic tank 4 is set. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

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

Embodiment 81. FIG.
FIG. 81 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 81 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 81, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 13 and 75, and a detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) 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 oxygen free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 81, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the difference with the predetermined target value, the inflow sewage amount to the first settling basin 1 is adjusted first, and the anaerobic tank 4 is set. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 82. FIG.
FIG. 82 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 82 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank. The apparatus is configured to adjust the angle. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 82, each component is the same as or equivalent to that shown in FIG. 15 and FIG.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 75, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (12.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 82, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 82, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the difference with the predetermined target value, the inflow sewage amount to the first sedimentation tank 1 is adjusted first, and the anaerobic tank 4 is set. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 83. FIG.
FIG. 83 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 83 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 83, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

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

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 126 via the signal line 146a. The regulator 126 outputs a signal that sets the amount of sewage flowing into the settling 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 first transmitted to the settling tank inflow pump 14 via a signal line 126a.

  From the above, the amount of sewage flowing into the anaerobic tank 4 is increased or decreased by increasing or decreasing the amount of sewage flowing into the settling basin 1 depending on how large the measured value of the phosphoric acid phosphorus concentration is. Increase or decrease the supply of organic matter. 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 83, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 83, the phosphoric acid phosphorus density | concentration of discharge water is measured, and the inflow sewage amount to the sedimentation tank 1 is adjusted initially according to the measured value, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 84.
FIG. 84 is a block diagram showing a control apparatus for a 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling 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.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 an equation similar to the equation (13.1) 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 is measured, and the bypass flow into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Furthermore, according to this Embodiment 84, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the sedimentation tank 1 is adjusted initially according to the measured value, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 85. FIG.
FIG. 85 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 85 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in a mixed solution in an oxygen-free tank as a means for detecting the amount of denitrification, and an oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 85, each component is the same as or equivalent to that indicated by the same reference numeral in FIG. 5 and FIG.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the 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 an equation similar to the equation (13.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 85, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 85, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the anaerobic tank 4 is adjusted by first adjusting the amount of sewage flowing into the settling basin 1 according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 86. FIG.
FIG. 86 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 86 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 86, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 an equation similar to the equation (13.1) is first output to the settling tank inflow pump 14.

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

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 87. FIG.
FIG. 87 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 87 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 87, each component is the same as or equivalent to the component shown with the same reference numeral in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the 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 an equation similar to the equation (13.1) is first output to the settling tank inflow pump 14.

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

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

Embodiment 88. FIG.
FIG. 88 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 88 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling 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 with the same reference numeral, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 an equation similar to the equation (13.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 88, the concentration of nitrate nitrogen in effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 88, the phosphoric acid phosphorus concentration of the effluent water is measured, and the inflow sewage amount to the settling basin 1 is adjusted according to the measured value, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.

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

Embodiment 89. FIG.
FIG. 89 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 89 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 89, each component is the same as or equivalent to that denoted by the same reference numeral in FIG. 13 and FIG.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the 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 an equation similar to the equation (13.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 89, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free oxygen concentration is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Further, according to this embodiment 89, the phosphoric acid phosphorus concentration of the discharged water is measured, and the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 90. FIG.
FIG. 90 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 90 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of discharged water as a means for detecting the amount of phosphorus flowing out of the system, and first adjusts the amount of sewage flowing into the settling basin. The apparatus is configured as described above. In FIG. 90, each component is the same as or equivalent to that indicated by the same reference numeral in FIG. 15 and FIG.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 an equation similar to the equation (13.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 90, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 90, the phosphoric acid phosphorus concentration of the effluent is measured, and the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 91. FIG.
FIG. 91 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 91 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 91, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 141 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, 137 is a setter for setting a target value of the phosphoric acid phosphorus concentration of the discharged water, and 127 is a phosphoric acid phosphorus concentration. A controller that outputs to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling basin 1 to a predetermined value according to the difference between the measured value of the total 141 and the target value set in the setter 137. is there. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 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 first sedimentation tank inflow pump 14 via the signal line 127a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 regulator 127 via the signal line 141a. Further, the target value set in the setting device 137 is transmitted to the adjuster 127 through the signal line 137a. The regulator 127 obtains the amount of sewage flowing into the first settling basin 1 according to, for example, a formula similar to the formula (14.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Output a value signal. The output of the regulator 127 is first transmitted to the settling tank inflow pump 14 via a signal line 127a.

  From the above, the amount of sewage flowing into the first sedimentation basin 1 increases or decreases depending on how much the measured value of the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is larger than the target value of the phosphoric acid phosphorus concentration of the discharged water. As a result, the amount of sewage flowing into the sedimentation basin 1 is increased or decreased, and the amount of organic matter supplied to the anaerobic tank 4 is increased or decreased. 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 91, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the system is surely The effect which can be reduced is acquired. Furthermore, according to this embodiment 91, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first settling basin is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 92. FIG.
FIG. 92 is a block diagram showing a control apparatus for a 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 92, each component is the same as or equivalent to that shown with the same reference numeral in FIGS.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 92, the oxidation-reduction potential in the mixed solution in the oxygen-free tank 5 is measured, and the bypass flows into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Furthermore, according to this Embodiment 92, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the first settling basin is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 93.
FIG. 93 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 93 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank and the nitrate nitrogen concentration of the effluent water as a means for detecting the denitrification amount, and to the oxygen-free tank The apparatus is configured to adjust the amount of sewage flowing into the bypass. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 93, each component is the same as or equivalent to that shown in FIG. 5 and FIG.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to this Embodiment 93, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 93, the phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 94. FIG.
FIG. 94 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 94 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 94, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 7 and 91, and a detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 94, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 94, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first settling basin is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

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

Embodiment 95. FIG.
FIG. 95 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 95 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 95, each component is the same as or equivalent to that denoted by the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 95, the concentration of nitrate nitrogen in the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 95, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the first sedimentation basin is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 96 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 96, each component is the same as or equivalent to that shown with the same reference numeral in FIGS.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to this Embodiment 96, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 96, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 97 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 97, each component is the same as or equivalent to that shown in FIG. 13 and FIG.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 97, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen free oxygen is determined according to the difference between the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, 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 settling basin is set according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 98 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 98, each component is the same as or equivalent to that denoted by the same reference numeral in FIG. 15 and FIG.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the embodiment 91, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (14.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 98, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 98, 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 the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 99 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 99, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

In addition, 141 is a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, and 128 is the amount of sewage flowing into the first sedimentation basin 1 according to the measurement value of the phosphoric acid phosphorus concentration meter 141. It is a regulator that first outputs a signal having a predetermined value to the settling tank inflow pump 14. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 128 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a and to the first settling tank inflow pump 14 via the signal line 128a.
The other components are the same as or equivalent to those shown in FIG. 1 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the first embodiment, the amount of sewage flowing into the anoxic tank 5 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 inflowing water is measured by the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the regulator 128 via the signal line 141a. The regulator 128 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 (15.1) according to the measured value of the phosphoric acid phosphorus concentration. The output of the regulator 128 is first transmitted to the settling tank inflow pump 14 via a signal line 128a.
From the above, the amount of sewage flowing into the anaerobic tank 4 is increased or decreased by increasing or decreasing the amount of sewage flowing into the settling basin 1 depending on how large the measured value of the phosphoric acid phosphorus concentration is. Increase or decrease the supply of organic matter. As a result, the phosphorus discharge amount increases and decreases, and the phosphorus removal amount increases and decreases.

  As described above, according to the 99th embodiment, the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 99, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage amount to the sedimentation tank 1 is adjusted initially according to the measured value, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

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

Embodiment 100. FIG.
FIG. 100 is a block diagram showing a control apparatus for a 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 the liquid mixture in the oxygen-free tank as a means for detecting the denitrification amount, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The apparatus is configured as described above. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 100, each component is the same as or equivalent to that shown in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to the embodiment 100, the oxidation-reduction potential in the liquid mixture in the oxygen-free tank 5 is measured, and the bypass flow into the oxygen-free tank 5 according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage, the amount of nitrogen flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing out of the system fluctuates. Is obtained. Furthermore, according to the embodiment 100, the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2 is measured, and the amount of sewage flowing into the sedimentation tank 1 is adjusted according to the measured value to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

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

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

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 101, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the discharged water are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 101, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted initially according to the measured value, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

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

Embodiment 102. FIG.
FIG. 102 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 102 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and adjusts the amount of sewage flowing into the oxygen-free tank by bypass. The device is configured. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 102, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 7 and 99, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, as in the case of the embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 102, the concentration of nitrate nitrogen in sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 102, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted initially according to the measured value, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

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

Embodiment 103. FIG.
FIG. 103 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 103 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 103, each component is the same as or equivalent to that shown by the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 103, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 103, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted according to the measured value to the anaerobic tank 4 first. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 104 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and adjusts the amount of sewage flowing into the anoxic tank. The apparatus is configured as follows. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 104, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 11 and 99, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 104, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 104, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and according to the measured value, the inflow sewage quantity to the sedimentation tank 1 is adjusted to the anaerobic tank 4 first. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 105 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 105, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 13 and 99, and the detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to the present embodiment 105, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this embodiment 105, 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 settling tank 1 is adjusted according to the measured value to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

  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, but the apparatus is configured to measure the nitrate nitrogen concentration. May be. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 106 of the present invention. This embodiment is equipped with a total nitrogen concentration meter that measures 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 the amount of sewage flowing into the anoxic tank is bypassed. The device is configured to adjust. Furthermore, this embodiment is equipped with a phosphoric acid phosphorus concentration meter for measuring the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means for detecting the amount of phosphorus flowing from outside the system. The device is configured to adjust the amount of sewage. In FIG. 106, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 15 and 99, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 embodiment 99, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (15.1) is first output to the settling tank inflow pump 14.

  As described above, according to this embodiment 106, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 106, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and according to the measured value, the inflow sewage quantity to the sedimentation tank 1 is adjusted to the anaerobic tank 4 first. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, it flows out of the system even when the flow rate and concentration of sewage flowing from outside the system fluctuate. An effect of reliably reducing the amount of phosphorus can be obtained.

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

Embodiment 107. FIG.
FIG. 107 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 107 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and an anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid concentration of sewage in the sewage in the sewage, and 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 biology) The apparatus is configured to adjust the amount of sewage flowing into the water treatment apparatus. In FIG. 107, 15 is an inflow pump (initial sedimentation basin inflow water amount adjusting means) for adjusting the flow rate of the sewage flowing into the biological water treatment apparatus.

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of 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, and 121 is a phosphoric acid phosphorus concentration meter. An adjuster that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value 142 and the target value set in the setter 131, and 200 is the adjuster 21. And a calculator (a first sedimentation basin inflow water amount adjustment signal output) that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the controller 121 and the output value of the regulator 121. Means). The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The regulator 121 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the setting device 131 via the signal line 131a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 121 through the signal line 121a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through 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 the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the regulator 121 via the signal line 142a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (8.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the regulator 121 is transmitted to the computing unit 200 via the signal line 121a.

The arithmetic unit 200 sets the amount of sewage flowing into the biological water treatment apparatus according to the following equation (24.1), for example, according to the output value of the regulator 21 and the output value of the regulator 121. Output a signal.
Q _pri = Q _ana + Q _ano (24.1)
here,
Q _pri : Inflow sewage amount to the biological water treatment device Q _ana : Inflow sewage amount to the anaerobic tank 4 Q _ano : Bypass inflow sewage amount to the anaerobic tank 5 The output of the computing unit 200 is via a signal line 200a It is transmitted to the inflow pump 15.

From the above, if the measured value of the nitrate nitrogen concentration is larger than the target value, the inflow sewage amount Q _pri to the biological water treatment apparatus increases and the bypass inflow sewage amount Q _ano to the anoxic tank 5 increases. The organic substance supply amount to the oxygen-free tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the contrary, if the measured value of nitrate nitrogen concentration is smaller than the target value, the inflow sewage amount Q _pri to the biological water treatment device decreases and the bypass inflow sewage amount Q _ano to the anoxic tank 5 decreases. The organic substance supply amount to the oxygen-free tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Further, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the inflow sewage amount Q _pri to the biological water treatment device increases and the inflow sewage amount to the first settling basin 1 increases, thereby anaerobic tank. The inflow sewage amount _Qana to 4 increases, and the organic substance supply amount to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage Q _pri flowing into the biological water treatment device decreases and the amount of sewage _sewed into the first sedimentation basin 1 decreases. The inflow sewage amount _Qana into the tank 4 decreases, and the organic matter supply amount 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 present embodiment 107, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this embodiment 107, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the inflow to the biological water treatment device is determined according to the difference from the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 107, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 108. FIG.
FIG. 108 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 108 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. Equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of sewage in the mixed solution, and configures the device to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is a thing. In FIG. 108, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the adjuster 22 and the output value of the adjuster 121. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 3 and 107, and detailed description thereof is omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 this embodiment 108, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 108, the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the inflow to the biological water treatment device is determined according to the difference from the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 108, 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 can be reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 109. FIG.
FIG. 109 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 109 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect sewage, a phosphoric acid phosphorus concentration meter that measures the phosphoric acid concentration of sewage in the mixed solution in the anaerobic tank is installed. The apparatus is configured to adjust the amount of water. In FIG. 109, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 23 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 5 and 107, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 this embodiment 109, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value. Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 109, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and it flows into a biological water treatment apparatus according to the difference with the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 109, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 109, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 110. FIG.
FIG. 110 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 110 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the 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 sewage inside, and configured to adjust 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. 110, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 7 and 107, and the detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, as in the case of the 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 present embodiment 110, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 110, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and it flows into a biological water treatment apparatus according to the difference with the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 110, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 110, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 111. FIG.
FIG. 111 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 111 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the 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 phosphorus in sewage in the liquid, and configured the apparatus to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system Is. In FIG. 111, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that adjusts the amount of sewage flowing into the biological water treatment apparatus in accordance with the output value of the regulator 24 and the output value of the regulator 121. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 111, the concentration of nitrate nitrogen in the discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 111, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and it flows into a biological water treatment apparatus according to the difference with a predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 111, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 111, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 112. FIG.
FIG. 112 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 112 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the 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 phosphorus in sewage in the liquid, and configured the apparatus to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system Is. In FIG. 112, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the adjuster 25 and the output value of the adjuster 121. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 11 and 107, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 this embodiment 112, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 112, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and it flows into a biological water treatment apparatus according to the difference with the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 112, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 113. FIG.
FIG. 113 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 113 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 to measure the sewage phosphoric acid concentration of sewage in the mixed liquid in the system, and to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system Is configured. In FIG. 113, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 26 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 13 and 107 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 this embodiment 113, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free is determined according to the difference between the predetermined total nitrogen concentration of the discharged water and the 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 tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 113, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and it flows into a biological water treatment apparatus according to the difference with the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this Embodiment 113, since the amount of inflow sewage to a biological water treatment apparatus is adjusted and the amount of inflow sewage to the anoxic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 113, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 114. FIG.
FIG. 114 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 114 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 to measure the sewage phosphoric acid concentration of sewage in the mixed liquid in the system, and to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system Is configured. In FIG. 114, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 27 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the regulator 121 via the signal line 121a, and the inflow pump 15 via the signal line 200a. Other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 15 and 107, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 this embodiment 114, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 114, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and it flows into a biological water treatment apparatus according to the difference with the predetermined target value. By adjusting the amount of sewage and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if it fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 114, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 114, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

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

Reference numeral 152 denotes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, 132 denotes a setter that sets a target value of the oxidation-reduction potential, and 122 denotes a measurement value of the oxidation-reduction potentiometer 152. And a regulator that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the value and the target value set in the setter 132, and 200 is the output value of the regulator 21. This is an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value according to the output value of the regulator 122. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The regulator 122 is connected to the oxidation-reduction potentiometer 152 via the signal line 152a and to the setting unit 132 via the signal line 132a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 122 through the signal line 122a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through the signal line 21a and the signal line 21b.
The oxidation-reduction potential of the sewage in the mixed liquid in the anaerobic tank 4 is measured by the oxidation-reduction potentiometer 152, and the measured value is transmitted to the regulator 122 via the signal line 152a. Further, the target value set in the setting device 132 is transmitted to the adjuster 122 through the signal line 132a. The regulator 122 determines the amount of sewage flowing into the anaerobic tank 4 according to a formula similar to the formula (9.1), for example, according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. Output a signal. The output of the regulator 122 is transmitted to the arithmetic unit 200 via the signal line 122a.

  The arithmetic unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device to a value obtained according to, for example, the equation (24.1) according to the output value of the regulator 21 and the output value of the regulator 122. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Moreover, 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 device increases and the amount of sewage flowing into the first sedimentation basin 1 increases, so that The inflow sewage amount increases and the organic matter supply amount to the anaerobic tank 4 increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, 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 device decreases and the amount of sewage flowing into the first sedimentation basin 1 decreases. The amount of inflow sewage 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 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 tank 5 is transferred according to the difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 115, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the flow into the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.
Moreover, according to this 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 115, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 116. FIG.
FIG. 116 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 116 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. A redox potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution, 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 is. An arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment apparatus according to the output value of the regulator 22 and the output value of the regulator 121. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 122 through the signal line 122a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those indicated by the same reference numerals in FIGS. 3 and 115, and detailed description thereof will be omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 116, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to the difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 116, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the flow into the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.
Moreover, according to this Embodiment 116, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 116, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 117. FIG.
FIG. 117 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 117 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank and the nitrate nitrogen concentration of the discharged water as a means for detecting the denitrification amount, and the phosphorus discharge amount A redox potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank as a means to detect the amount of sewage that flows into the anoxic tank and the amount that flows into the biological water treatment system The device is configured to adjust. In FIG. 117, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 23 and the output value of the regulator 122. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 122 through the signal line 122a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 5 and FIG.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 117, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow to the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 this embodiment 117, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 117, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 118.
FIG. 118 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 118 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. It is equipped with a redox potentiometer that measures the redox potential of sewage inside, and 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 denoted by the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, 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 118, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 118, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the flow into the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.
Further, according to this embodiment 118, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 118, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 119.
FIG. 119 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 119 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount It is equipped with a redox potentiometer that measures the redox potential of sewage in the liquid and 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. In FIG. 119, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 24 and the output value of the regulator 122. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 122 through the signal line 122a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 9 and 115, and thus detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 concentration of nitrate nitrogen in the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 119, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the flow into the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 this embodiment 119, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 119, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 120. FIG.
FIG. 120 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 120 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount It is equipped with a redox potentiometer that measures the redox potential of sewage in the liquid and 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. In FIG. 120, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 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 regulator 25 and the output value of the regulator 122. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 122 through the signal line 122a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 11 and FIG.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 120, the concentration of nitrate nitrogen in effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 120, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the flow into the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 120, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 121. FIG.
FIG. 121 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 121 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 redox potentiometer that measures the redox potential of sewage in the liquid mixture inside, and configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is a thing. In FIG. 121, reference numeral 200 denotes a computing unit 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 in accordance with the output value of the regulator 26 and the output value of the regulator 122. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 122 through the signal line 122a, and the inflow pump 15 through 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 115, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 121, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and anoxic oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 121, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the flow into the biological water treatment device is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.
Moreover, according to this Embodiment 121, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 121, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 122. FIG.
FIG. 122 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 122 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 redox potentiometer that measures the redox potential of sewage in the liquid mixture inside, and configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system It is a thing. In FIG. 122, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 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 regulator 27 and the output value of the regulator 122. It is. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 122 through the signal line 122a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 122, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 122, the oxidation-reduction potential of the sewage in the mixed solution in the anaerobic tank 4 is measured, and the inflow to the biological water treatment device is determined according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.
Moreover, according to this Embodiment 122, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 123. FIG.
FIG. 123 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 123 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and an anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a phosphorus content meter that measures the phosphorus content of the phosphorus accumulating bacteria in the mixture, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The device is configured. In FIG. 123, 15 is an inflow pump for adjusting the flow rate of the sewage flowing into the biological water treatment apparatus.

Further, 162 is a phosphorus content measuring device for measuring the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4, 133 is a setting device for setting a target value of the phosphorus content, and 123 is a phosphorus content measuring device. An adjuster that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value 162 and the target value set in the setter 133, 200 is the adjuster 21. Is a calculator that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the controller 123 and the output value of the regulator 123. The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The regulator 123 is connected to the phosphorus content measuring device 162 via the signal line 162a and to the setting device 133 via the signal line 133a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the regulator 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through 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 the phosphorus content measuring device 162, and the measured value is transmitted to the regulator 123 via the signal line 162a. Further, the target value of the phosphorus content set in the setting unit 133 is transmitted to the adjuster 123 through the signal line 133a. The regulator 123 determines the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (10.1) according to the difference between the measured value of the phosphorus content and a predetermined target value. Output a signal. The output of the adjuster 123 is transmitted to the arithmetic unit 200 via the signal line 123a.

  The computing unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device in accordance with, for example, the expression (24.1) according to the output value of the regulator 21 and the output value of the regulator 123. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Moreover, if the measured value of phosphorus content is smaller than a target value, the amount of sewage flowing into the anaerobic tank 4 will increase due to an increase in the amount of sewage flowing into the first settling basin 1 and supply of organic matter to the anaerobic tank 4 The amount increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphorus content is larger than the target value, the amount of sewage flowing into the anaerobic tank 4 will decrease due to a decrease in the amount of sewage flowing into the settling basin 1 at first. Supply volume decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to this Embodiment 123, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, 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 biological water treatment device is supplied according to the difference from the predetermined target value. By adjusting the inflow sewage amount and adjusting the inflow sewage amount to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the phosphorus discharge amount is kept constant. Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this Embodiment 123, since the inflow sewage amount to a biological water treatment apparatus is adjusted and the bypass inflow sewage amount to the anoxic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 123, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 124. FIG.
FIG. 124 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 124 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. A phosphorus content meter is provided to measure the phosphorus content of the phosphorus accumulating bacteria in the mixture, and the device is adjusted to adjust the amount of sewage that flows into the anoxic tank and the amount that flows into the biological water treatment system. It is composed. In FIG. 124, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 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 regulator 22 and the output value of the regulator 123. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 123 through the signal line 123a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIG. 3 and FIG. 123, and thus detailed description thereof is omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 124, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and depending on the difference from the predetermined target value, By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 124, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the biological water treatment device is supplied according to the difference from the predetermined target value. By adjusting the inflow sewage amount and adjusting the inflow sewage amount to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the phosphorus discharge amount is kept constant, so the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 124, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 124, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 125. FIG.
FIG. 125 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 125 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect water, equipped with a phosphorus content meter to measure the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank, the amount of sewage flowing into the anoxic tank and flowing into the biological water treatment system The device is configured to adjust the amount of sewage. In FIG. 125, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment apparatus to a predetermined value according to the output value of the adjuster 23 and the output value of the adjuster 123. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 123 through the signal line 123a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 5 and 123 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, 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 biological water treatment device is supplied according to the difference from the predetermined target value. By adjusting the inflow sewage amount and adjusting the inflow sewage amount to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the phosphorus discharge amount is kept constant, so the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 125, 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 can be reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, 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 126, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, 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 biological water treatment device is supplied according to the difference from the predetermined target value. By adjusting the inflow sewage amount and adjusting the inflow sewage amount to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the phosphorus discharge amount is kept constant. Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 126, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 126, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 127. FIG.
FIG. 127 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 127 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a phosphorus content meter that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, and configures the device to adjust the amount of sewage that flows into the anoxic tank and the amount that flows into the biological water treatment system It is a thing. In FIG. 127, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 24 and the output value of the regulator 123. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 123 through the signal line 123a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 effluent water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 127, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the biological water treatment apparatus is supplied according to the difference from the predetermined target value. By adjusting the amount of inflow sewage and adjusting the amount of inflow sewage to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 127, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 127, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 128. FIG.
FIG. 128 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 128 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a phosphorus content meter that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, and configures the device to adjust the amount of sewage that flows into the anoxic tank and the amount that flows into the biological water treatment system It is a thing. In FIG. 128, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the adjuster 25 and the output value of the adjuster 123. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 123 through the signal line 123a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 11 and FIG.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 128, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 128, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the biological water treatment device is supplied according to the difference from the predetermined target value. By adjusting the inflow sewage amount and adjusting the inflow sewage amount to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the phosphorus discharge amount is kept constant, so the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 128, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 129. FIG.
FIG. 129 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 129 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 meter that measures the phosphorus content of the phosphorus accumulating bacteria in the mixture, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The device is configured. In FIG. 129, reference numeral 200 denotes an arithmetic unit 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 in accordance with the output value of the regulator 26 and the output value of the regulator 123. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 123 through the signal line 123a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 13 and FIG.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 oxygen free oxygen is determined according to the difference between the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, 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 biological water treatment apparatus is supplied according to the difference from the predetermined target value. By adjusting the amount of inflow sewage and adjusting the amount of inflow sewage to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 129, since the amount of sewage flowing into the biological water treatment apparatus 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 129, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 130. FIG.
FIG. 130 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 130 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 meter that measures the phosphorus content of the phosphorus accumulating bacteria in the mixture, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The device is configured. In FIG. 130, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 27 and the output value of the regulator 123. It is. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the regulator 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. 15 and 123, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 130, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 130, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the biological water treatment device is supplied according to the difference from the predetermined target value. By adjusting the amount of inflow sewage and adjusting the amount of inflow sewage to the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant. Even if fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 130, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

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

142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of sewage in the mixed solution in the anaerobic tank 4, and 141 is a phosphoric acid phosphorus concentration for measuring the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2. 181 is a computing unit that calculates the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, and 134 is the mixing in the anaerobic tank 4. A setter 124 for setting a target value of the difference between the phosphoric acid phosphorus concentration of sewage in the liquid and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is set in the calculation value of the calculator 181 and the setter 134. A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference from the target value, to the calculator 200. Depending on the amount of sewage flowing into the biological water treatment system A calculator for outputting a signal whose value is the inflow pump 15. 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 computing unit 181 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The adjuster 124 is connected to the arithmetic unit 181 via the signal line 181a and to the setting unit 134 via the signal line 134a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 124 through the signal line 124a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value of the nitrate nitrogen concentration set in the setting device 31 is transmitted to the regulator 21 via the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through 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 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the calculator 181 via the signal line 141a. The calculator 181 calculates the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed liquid in the anaerobic tank 4 and the phosphorous phosphorus concentration of the sewage flowing into the biological reaction tank 2 according to, for example, the formula (11.1).

  The calculated value of the calculator 181 is transmitted to the adjuster 124 through the signal line 181a. Further, the target value set in the setting unit 134 is transmitted to the adjuster 124 through the signal line 134a. The regulator 124 calculates the difference between the phosphoric phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 and a predetermined target value. In response to the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 4 according to a formula similar to the formula (11.2), for example. The output of the adjuster 124 is transmitted to the arithmetic unit 200 via the signal line 124a.

  The computing unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device in accordance with, for example, the equation (24.1) in accordance with the output value of the regulator 21 and the output value of the regulator 124. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
If the calculated value of the difference between the phosphoric acid concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid concentration of sewage flowing into the biological reaction tank 2 is smaller than the target value, the biological water treatment As the amount of sewage flowing into the apparatus 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 increases. As a result, phosphorus discharge increases and the amount of phosphorus removal increases. Conversely, if the calculated value of the difference between the phosphorous phosphorus concentration of 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 larger than the target value, the biological water As the amount of sewage flowing into the treatment apparatus decreases and the amount of sewage flowing into the first sedimentation basin 1 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, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

As described above, according to this 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 tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 131, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 biological water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Moreover, according to this Embodiment 131, since the inflow sewage amount to a biological water treatment apparatus is adjusted, and the bypass inflow sewage amount to an anaerobic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 131, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 132. FIG.
FIG. 132 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 132 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. A device for calculating the difference between the concentration of phosphoric acid phosphorus in the mixed solution and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reactor 2 is provided. The device is configured to adjust the inflow sewage amount. In FIG. 132, an arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 22 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 124 through the signal line 124a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those indicated by the same reference numerals in FIGS. 3 and 131, and detailed description thereof will be omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 132, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 132, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 and the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 are measured, and the calculation of those difference is carried out. 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 device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Moreover, according to this Embodiment 132, since the amount of sewage flowing into the biological water treatment apparatus 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 132, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 133. FIG.
FIG. 133 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 133 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect the amount of sewage by-passing into the oxygen-free tank, equipped with a device for calculating the difference between the phosphorous phosphorus concentration in the mixture in the anaerobic tank and the phosphoric acid phosphorus concentration in the sewage flowing into the biological reaction tank And the apparatus is configured to adjust the amount of sewage flowing into the biological water treatment apparatus. In FIG. 133, an arithmetic unit 200 outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 23 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 124 through the signal line 124a, and the inflow pump 15 through the signal line 200a. Other components are the same as or equivalent to those indicated by the same reference numerals in FIG. 5 and FIG. 131, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 133, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 biological water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Moreover, according to this embodiment 133, since the amount of sewage flowing into the biological water treatment apparatus 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 133, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 134.
FIG. 134 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 134 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a device that calculates the difference between the concentration of phosphoric acid phosphorus in the sewage and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2 The apparatus is configured to adjust the amount of water. In FIG. 134, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, 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 134, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 134, 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 biological water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Further, 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 134, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 135. FIG.
FIG. 135 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 135 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a device that calculates the difference between the concentration of phosphoric acid phosphorus in the liquid and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, and the amount of sewage flowing into the anoxic tank and the flow into the biological water treatment system The device is configured to adjust the amount of sewage. In FIG. 135, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 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 regulator 24 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 124 through the signal line 124a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 135, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 135, 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 biological water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 135, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 136. FIG.
FIG. 136 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 136 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a device that calculates the difference between the concentration of phosphoric acid phosphorus in the liquid and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, and the amount of sewage flowing into the anoxic tank and the flow into the biological water treatment system The device is configured to adjust the amount of sewage. In FIG. 136, reference numeral 200 denotes an arithmetic unit 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 in accordance with the output value of the regulator 25 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 124 through the signal line 124a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 136, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 and the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 are measured, and the calculation of those difference is carried out. 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 device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Further, according to this embodiment 136, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 136, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 137.
FIG. 137 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 137 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the mixed liquid and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, and the amount of sewage flowing into the anoxic tank and the biological water treatment device The device is configured so as to adjust the amount of sewage flowing into the water. In FIG. 137, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the amount of sewage flowing into the biological water treatment device to a predetermined value according to the output value of the regulator 26 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 124 through the signal line 124a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 13 and FIG. 131 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 the oxygen-free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 137, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 biological water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Moreover, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 137, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 138.
FIG. 138 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 138 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the mixed liquid and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, and the amount of sewage flowing into the anoxic tank and the biological water treatment device The device is configured so as to adjust the amount of sewage flowing into the water. In FIG. 138, an arithmetic unit 200 outputs a signal to the inflow pump 15 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 regulator 27 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 27b, the regulator 124 through the signal line 124a, and the inflow pump 15 through 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 detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 138, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 138, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 biological water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4 according to the difference between the value and the predetermined target value In addition, since the amount of phosphorus discharged is kept constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates.
Further, according to this embodiment 138, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 138, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

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

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of 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, and 171 is the inside of the anaerobic tank 4. A memory circuit 182 for storing the phosphoric acid phosphorus concentration data of the mixed solution, and 182 for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank 4 using the phosphoric acid phosphorus concentration data stored in the memory circuit 171 An arithmetic unit 121 that performs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the estimated value of the phosphoric acid phosphorus concentration meter 142 and the target value set in the setting unit 131. The controller 200 outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 21 and the output value of the regulator 121. It is an arithmetic unit. 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 a signal line 142a. The computing unit 182 is connected to the storage circuit 171 through the signal line 171a. The regulator 121 is connected to the arithmetic unit 182 via the signal line 182a and to the setting unit 131 via the signal line 131a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 121 through the signal line 121a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through 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 the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the storage circuit 171 via the signal line 142a. The computing unit 182 estimates the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time using the data of the phosphoric acid phosphorus concentration stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as a least square method. The phosphorous acid phosphorus concentration data necessary for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the computing unit is transmitted to the regulator 121 via the signal line 182a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (8.1) according to the difference between the estimated value of the phosphoric acid phosphorus concentration and the predetermined target value. Is output. The output of the regulator 121 is transmitted to the computing unit 200 via the signal line 121a.

  The computing unit 200 outputs a signal that sets the amount of sewage flowing into the biological water treatment device to a value obtained according to, for example, the equation (24.1) according to the output value of the regulator 21 and the output value of the regulator 121. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Further, if the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, 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, so that it enters the anaerobic tank 4. The amount of inflow sewage 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. On the contrary, 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 device decreases and the amount of sewage flowing into the first sedimentation basin 1 decreases. The amount of sewage flowing into the water decreases, and the amount of organic matter supplied to the anaerobic tank 4 decreases. As a result, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

As described above, according to this embodiment 139, the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the system is sure The effect which can be reduced is acquired. Furthermore, according to this Embodiment 139, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Further, according to this embodiment 139, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 139, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 140. FIG.
FIG. 140 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 140 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. It is equipped with a device that estimates the phosphoric acid phosphorus concentration of 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 biological water treatment device. . In FIG. 140, an arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 22 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 3 and 139 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 140, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 is measured, and the accumulated phosphoric acid phosphorus concentration data is used in the mixed solution in the anaerobic tank 4. Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Further, according to this 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 140, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 141. FIG.
FIG. 141 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 141 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect sewage, it is equipped with a device that estimates the phosphoric acid phosphorus concentration of the sewage in the mixed solution in the anaerobic tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The apparatus is configured as described above. In FIG. 141, reference numeral 200 denotes an arithmetic unit 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 in accordance with the output value of the regulator 23 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 5 and 139 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 141, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Moreover, according to this Embodiment 141, since the amount of inflow sewage to a biological water treatment apparatus is adjusted and the amount of inflow sewage to the anoxic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 141, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 142. FIG.
FIG. 142 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 142 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. A device for estimating the concentration of phosphoric acid phosphorus in the sewage in the inside 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. In FIG. 142, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, 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 oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 142, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Moreover, according to this embodiment 142, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 142, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

Embodiment 143.
FIG. 143 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 143 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount A device for estimating the phosphoric acid phosphorus concentration 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. In FIG. 143, reference numeral 200 denotes an arithmetic unit 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 in accordance with the output value of the regulator 24 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 143, the concentration of nitrate nitrogen in the discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 143, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and in the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system fluctuates, An effect of reliably reducing the amount can be obtained.
In addition, according to this embodiment 143, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 143, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 144. FIG.
FIG. 144 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 144 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount A device for estimating the phosphoric acid phosphorus concentration 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. In FIG. 144, an arithmetic unit 200 outputs a signal to the inflow pump 15 that sets the amount of sewage flowing into the biological water treatment device to a predetermined value according to the output value of the regulator 25 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 144, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Further, according to this embodiment 144, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 145. FIG.
FIG. 145 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 145 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid of the inside, 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 is. In FIG. 145, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 26 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 13 and FIG.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 145, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the oxygen free oxygen is determined according to the difference between the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 145, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and in the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Moreover, according to this embodiment 145, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Further, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 146.
FIG. 146 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 146 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed liquid of the inside, 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 is. In FIG. 146, reference numeral 200 denotes an arithmetic unit 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 in accordance with the output value of the regulator 27 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the regulator 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 FIGS. 15 and 139 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 146, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimate the phosphoric acid phosphorus concentration of sewage, adjust the amount of sewage flowing into the biological water treatment device according to the difference between the estimated value and the target value, and adjust the amount of sewage flowing into the anaerobic tank 4 As a result, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, the amount of phosphorus flowing out from the biological water treatment device An effect of reliably reducing the amount can be obtained.
Moreover, according to this embodiment 146, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 146, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 147. FIG.
FIG. 147 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 147 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the effluent water as a means to measure the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is a thing. In FIG. 147, 15 is an inflow pump for adjusting the flow rate of sewage flowing into the biological water treatment apparatus.

Further, 146 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the discharged water, 135 is a setting device for setting a target value of the phosphoric acid phosphorus concentration, and 125 is a measurement value and setting device 135 for the phosphoric acid phosphorus concentration meter 146. 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 the calculator 200, and 200 indicates the output value of the controller 21 and the controller 125. It is a regulator that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The adjuster 125 is connected to the phosphoric acid phosphorus concentration meter 146 via the signal line 146a and the setter 135 via the signal line 135a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 125 through the signal line 125a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through the signal line 21a and the signal line 21b.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 125 via the signal line 146a. Further, the target value set in the setting device 135 is transmitted to the adjusting device 125 via the signal line 135a. The regulator 125 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (12.1) in accordance with the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the regulator 125 is transmitted to the computing unit 200 via the signal line 125a.

  The computing unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device to a value obtained according to, for example, the formula (24.1) according to the output value of the regulator 21 and the output value of the regulator 125. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Also, if the measured value of the phosphoric acid phosphorus concentration 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 first sedimentation basin 1 increases, so that it enters the anaerobic tank 4. The amount of inflow sewage 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. On the contrary, 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 first sedimentation basin 1 decreases. The amount of sewage flowing into the water 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 this embodiment 147, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the system is surely The effect which can be reduced is acquired. Further, according to this embodiment 147, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the biological water treatment device is adjusted according to the difference from the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 147, 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 148.
FIG. 148 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 148 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and 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 water, and configured to adjust 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. 148, an arithmetic unit 200 outputs a signal to the inflow pump 15 that makes the inflow sewage amount to the biological water treatment device a predetermined value in accordance with the output value of the regulator 22 and the output value of the regulator 125. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 125 through the signal line 125a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 3 and 147 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 148, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the anaerobic tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Further, according to this embodiment 148, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the biological water treatment device is adjusted according to the difference from the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 148, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 149.
FIG. 149 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 149 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification outside the system. As a means of detecting the amount of outflowing phosphorus, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent water is provided. The device is configured to adjust. In FIG. 149, an arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 23 and the output value of the regulator 125. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 125 through the signal line 125a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 5 and 147 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the 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 nitrogen concentration of the effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if 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 phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the biological water treatment device is adjusted according to the difference from the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 149, since the amount of sewage flowing into the biological water treatment apparatus 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 149, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 150. FIG.
FIG. 150 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 150 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and discharged 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 phosphoric acid phosphorus concentration of water, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. . In FIG. 150, each component is the same as or equivalent to that indicated by the same reference numeral in FIGS. 7 and 147, and therefore detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 150, the anaerobic tank 4 is measured by measuring the phosphoric acid phosphorus concentration of the effluent water and adjusting the amount of sewage flowing into the biological water treatment device according to the difference from 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, An 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 amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 151. FIG.
FIG. 151 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 151 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharged water, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. is there. In FIG. 151, an arithmetic unit 200 outputs a signal to the inflow pump 15 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 regulator 24 and the output value of the regulator 125. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 125 through the signal line 125a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 9 and 147 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the 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 discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Further, according to this embodiment 151, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the biological water treatment device is adjusted according to the difference from the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 151, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 151, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 152. FIG.
FIG. 152 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 152 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharged water, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. is there. In FIG. 152, an arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 25 and the output value of the regulator 125. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 125 through the signal line 125a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 11 and 147 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 152, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Further, according to this embodiment 152, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the biological water treatment device is adjusted according to the difference from the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 152, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 152, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 153.
FIG. 153 is a block diagram showing a control apparatus for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the effluent water as a means to measure the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is a thing. In FIG. 153, an arithmetic unit 200 outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 26 and the output value of the regulator 125. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 125 through the signal line 125a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 13 and 147 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to the case of the 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 an oxygen-free is determined according to the difference from the target value of the predetermined total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 153, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow amount to the biological water treatment apparatus is adjusted according to the difference with the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system fluctuates, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Moreover, according to this 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, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 153, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 154.
FIG. 154 is a block diagram showing a control apparatus for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the effluent water as a means to measure the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is a thing. In FIG. 154, reference numeral 200 denotes an arithmetic unit that outputs a signal that makes the inflow sewage amount to the biological water treatment device a predetermined value to the inflow pump 15 in accordance with the output value of the regulator 27 and the output value of the regulator 125. It is. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the regulator 125 via the signal line 125a, and the inflow pump 15 via the signal line 200a. Other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 15 and 147, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to the case of the 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 influent water is measured, and the amount of sewage flowing into the anoxic tank 5 according to the measured value is adjusted to the anoxic tank 5. Since the amount of readily decomposable organic matter to be supplied is adjusted, the amount of nitrogen flowing out from the biological water treatment device can be reliably reduced even when the amount or concentration of sewage flowing from outside the system fluctuates. . Furthermore, according to this embodiment 154, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the biological water treatment device is adjusted according to the difference from the 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 system, and the amount of phosphorus discharged is kept constant, so even if the flow rate or concentration of sewage flowing from outside the system changes, An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 154, 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 adjusted according to the measured value, thereby anoxic. Since the amount of organic matter supplied to the tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained even when the flow rate or concentration of sewage flowing from outside the system fluctuates. Furthermore, according to this 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. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. Further, in this embodiment, the amount of phosphorus flowing out from the biological water treatment apparatus is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the total phosphorus concentration is measured instead of the phosphorous phosphorus concentration. The apparatus may be configured as described above.

Embodiment 155.
FIG. 155 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 155 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the effluent water as a means to measure the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is a thing. In FIG. 155, 15 is an inflow pump for adjusting the flow rate of the sewage flowing into the biological water treatment apparatus.

In addition, 146 is a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water, and 126 is a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the measured value of the phosphoric acid phosphorus concentration meter 146. The controller 200 adjusts the output to the computing unit 200, and the signal 200 flows in a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 21 and the output value of the regulator 126. It is a calculator that outputs to the pump 15. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 126 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 126 through the signal line 126a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through the signal line 21a and the signal line 21b.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 126 via the signal line 146a. The regulator 126 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained, for example, according to an expression similar to the expression (13.1), according to the measured value of the phosphoric acid phosphorus concentration. The output of the adjuster 126 is transmitted to the arithmetic unit 200 via the signal line 126a.

  The computing unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device to a value obtained by, for example, equation (24.1) according to the output value of the regulator 21 and the output value of the regulator 126. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Also, depending on how large the measured value of phosphoric acid phosphorus concentration is, the amount of sewage flowing into the biological water treatment device increases and decreases, and the amount of sewage flowing into the first sedimentation basin 1 increases and decreases to the anaerobic tank 4. The amount of inflow sewage 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 tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this embodiment 155, the phosphoric acid phosphorus concentration of the effluent water is measured, and 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 according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
In addition, according to this embodiment 155, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 156.
FIG. 156 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 156 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and 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 water, and configured to adjust 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. 156, an arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 22 and the output value of the regulator 126. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 126 through the signal line 126a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 3 and 155 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to 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 156, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the flow to the oxygen-free tank 5 is determined according to the difference from the predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 156, the phosphoric acid phosphorus concentration of the effluent water is measured, and the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the biological water treatment device according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
Further, 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 anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 156, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 157.
FIG. 157 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 157 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification outside the system. As a means of detecting the amount of outflowing phosphorus, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the effluent water is provided. The device is configured to adjust. In FIG. 157, an arithmetic unit 200 outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 23 and the output value of the regulator 126. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 126 through the signal line 126a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 5 and 155 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to 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 nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 157, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the biological water treatment apparatus is adjusted according to the measured value, and the inflow sewage amount to the anaerobic tank 4 By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
Moreover, according to this embodiment 157, the amount of organic matter supplied to the anaerobic tank 4 is adjusted because the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 157, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 158.
FIG. 158 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 158 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and discharged 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 phosphoric acid phosphorus concentration of water, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. . In FIG. 158, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS. 7 and 155, and therefore detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to 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 158, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 158, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the biological water treatment apparatus is adjusted according to the measured value, and the inflow sewage amount to the anaerobic tank 4 By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
Further, according to this embodiment 158, since the amount of sewage flowing into the biological water treatment apparatus 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this 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. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 159.
FIG. 159 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 159 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharged water, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. is there. In FIG. 159, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 24 and the output value of the regulator 126. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 126 through the signal line 126a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 9 and 155 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to 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 discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the amount or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 159, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the biological water treatment apparatus is adjusted according to the measured value, and the inflow sewage amount to the anaerobic tank 4 By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
Further, according to this embodiment 159, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value, thereby anoxic. Since the amount of organic matter supplied to the tank 5 is adjusted, an effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained even when the flow rate or concentration of sewage flowing from outside the system fluctuates. Furthermore, according to this Embodiment 159, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 160. FIG.
FIG. 160 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 160 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharged water, and is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. is there. In FIG. 160, reference numeral 200 denotes an arithmetic unit that outputs a signal that makes the inflow sewage amount to the biological water treatment device a predetermined value according to the output value of the regulator 25 and the output value of the regulator 126 to the inflow pump 15. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 126 through the signal line 126a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 11 and 155 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to 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 160, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 160, the phosphoric acid phosphorus concentration of effluent water is measured, and the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the biological water treatment device according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
In addition, according to the embodiment 160, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus is configured to measure the total phosphorus concentration instead of the phosphorous phosphorus concentration. It may be configured.

Embodiment 161. FIG.
FIG. 161 is a block diagram showing a control apparatus for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the effluent water as a means to measure the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is a thing. In FIG. 161, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 26 and the output value of the regulator 126. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 126 through the signal line 126a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 13 and 155 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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, similarly to 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 161, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 161, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the biological water treatment apparatus is adjusted according to the measured value, and the inflow sewage amount to the anaerobic tank 4 By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
Further, according to this embodiment 161, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 161, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 162. FIG.
FIG. 162 is a block diagram showing a control apparatus for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the effluent water as a means to measure the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is a thing. In FIG. 162, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 27 and the output value of the regulator 126. It is. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 126 through the signal line 126a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 15 and 155 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, similarly to 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 sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 162, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount which flows into a biological water treatment apparatus according to the measured value, and the inflow sewage amount to the anaerobic tank 4 By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus 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.
In addition, according to this embodiment 162, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 162, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 163.
FIG. 163 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 163 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system 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.

Further, 141 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, 137 is a setter for setting a target value of the phosphoric acid phosphorus concentration of the discharged water, and 127 is a phosphoric acid phosphorus concentration. A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value of the total 141 and the target value set in the setter 137, and 200 is a regulator It is a computing unit that outputs to the inflow pump 15 a signal that sets the inflow sewage amount to the biological water treatment device to a predetermined value according to the output value of 21 and the output value of the regulator 127. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The adjuster 127 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a and to the setter 137 via the signal line 137a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the regulator 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 shown in FIG. 1 with the same reference numerals, and detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the regulator 127 via the signal line 141a. Further, the target value set in the setting device 137 is transmitted to the adjuster 127 through the signal line 137a. The regulator 127 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (14.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the adjuster 127 is transmitted to the arithmetic unit 200 via the signal line 127a.

  The computing unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device in accordance with, for example, the equation (24.1) according to the output value of the regulator 21 and the output value of the regulator 127. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
In addition, the amount of sewage flowing into the biological water treatment device increases or decreases depending on how much the measured value of the phosphoric acid concentration of sewage flowing into the biological reaction tank 2 is larger than the target value of the phosphoric acid concentration of the discharged water. First, when 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 this embodiment 163, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 163, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the biological phosphorus is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 163, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 163, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 164.
FIG. 164 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 164 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and means for detecting the amount of phosphorus flowing from outside the system. Equipped with a phosphoric acid phosphorus concentration meter to measure the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The device is configured. In FIG. 164, reference numeral 200 denotes a computing unit that outputs a signal to the inflow pump 15 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 regulator 22 and the output value of the regulator 127. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 127 through the signal line 127a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 164, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the flow to the oxygen-free tank 5 is determined according to the difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 164, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the biological value is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, 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 anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 164, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 165.
FIG. 165 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 165 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification from outside the system. As a means to detect the amount of inflowing phosphorus, it is 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. The apparatus is configured to adjust the amount of inflow sewage. In FIG. 165, reference numeral 200 denotes an arithmetic unit that outputs a signal that makes the inflow sewage amount to the biological water treatment device a predetermined value according to the output value of the regulator 23 and the output value of the regulator 127 to the inflow pump 15. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 127 through the signal line 127a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 5 and 163 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 165, the nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 165, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the biological value is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 165, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Further, according to this 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 166. FIG.
FIG. 166 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 166 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and is used as a means for detecting the amount of phosphorus flowing from outside the system. It is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the sewage flowing into the reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is composed. In FIG. 166, each component is the same as or equivalent to the component indicated by the same reference numeral in FIGS. 7 and 163, and thus detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, 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 mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 166, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and it is biological according to the difference with the target value of the phosphoric acid phosphorus concentration of predetermined discharge water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 166, 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 effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 166, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 167.
FIG. 167 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 167 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the bioreactor and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. Is configured. In FIG. 167, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 24 and the output value of the regulator 127. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 127 through the signal line 127a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 9 and 163 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 concentration of nitrate nitrogen in the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 167, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the biological value is determined according to the difference from the predetermined target value of the phosphoric acid phosphorus concentration of the discharged water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 167, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 167, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 168 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the bioreactor and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. Is configured. In FIG. 168, reference numeral 200 denotes an arithmetic unit that outputs a signal that makes the inflow sewage amount to the biological water treatment device a predetermined value according to the output value of the regulator 25 and the output value of the regulator 127 to the inflow pump 15. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 127 through the signal line 127a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 168, the phosphoric acid phosphorus concentration of the sewage which flows into the biological reaction tank 2 is measured, and the biological value is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 168, since the amount of sewage flowing into the biological water treatment apparatus 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 reduced. The effect that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this embodiment 168, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 169.
FIG. 169 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 169 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the biological reaction tank as a means to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The apparatus is configured as described above. In FIG. 169, an arithmetic unit 200 outputs a signal to the inflow pump 15 with a predetermined value for the amount of sewage flowing into the biological water treatment device according to the output value of the regulator 26 and the output value of the regulator 127. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 127 through the signal line 127a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 169, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the oxygen free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this embodiment 169, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the biological phosphorus is determined according to the difference from the predetermined target value of the phosphoric acid phosphorus concentration of the discharged water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 169, the amount of sewage flowing into the biological water treatment device is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 169, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 170. FIG.
FIG. 170 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 170 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the biological reaction tank as a means to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The apparatus is configured as described above. In FIG. 170, reference numeral 200 denotes a computing unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value according to the output value of the adjuster 27 and the output value of the adjuster 127. It is. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 127 through the signal line 127a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 15 and 163 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 170, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 170, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the biological concentration is determined according to the difference from the predetermined target value of the phosphoric acid phosphorus concentration of the discharged water. By adjusting the amount of sewage flowing into the water treatment device and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted and the amount of phosphorus discharged is adjusted. Even when the flow rate or concentration of the liquid fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 170, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this embodiment 170, 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. 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. Also good.

Embodiment 171.
FIG. 171 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 171 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank as a means to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system 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.

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. The controller 200 outputs a signal to the arithmetic unit 200. The controller 200 sets the amount of sewage flowing into the biological water treatment device to a predetermined value according to the output value of the controller 21 and the output value of the controller 128. This is a calculator that outputs a signal to the inflow pump 15. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 128 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 128 through the signal line 128a, and the inflow pump 15 through 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 detailed description thereof is 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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the inflow-oxygen tank bypass inflow pump 12 through the signal line 21a, and is also transmitted to the arithmetic unit 200 through 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the controller 128 via the signal line 141a. The regulator 128 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 (15.1) according to the measured value of the phosphoric acid phosphorus concentration. The output of the adjuster 128 is transmitted to the arithmetic unit 200 via the signal line 128a.

  The computing unit 200 generates a signal that sets the amount of sewage flowing into the biological water treatment device in accordance with, for example, the equation (28.1) according to the output value of the regulator 21 and the output value of the regulator 128. Output. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through the signal line 200a.

From the above, if the measured value of nitrate nitrogen concentration is larger than the target value, the amount of sewage flowing into the biological water treatment apparatus will increase and the amount of sewage flowing into the anoxic tank 5 will increase. The organic substance supply amount to 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, 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 flowing into the anoxic tank 5 decreases. The organic substance supply amount to 5 decreases. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Also, depending on how large the measured value of phosphoric acid phosphorus concentration is, the amount of sewage flowing into the biological water treatment device increases and decreases, and the amount of sewage flowing into the first sedimentation basin 1 increases and decreases to the anaerobic tank 4. The amount of inflow sewage 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 sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 171, the anaerobic tank which measures the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2, adjusts the inflow sewage amount to a biological water treatment apparatus 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 tank 4 and the amount of phosphorus discharged is adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 171, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 171, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 172.
FIG. 172 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 172 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and means for detecting the amount of phosphorus flowing from outside the system. Equipped with a phosphoric acid phosphorus concentration meter to measure the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The device is configured. In FIG. 172, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 22 and the output value of the regulator 128. It is. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 128 through the signal line 128a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 3 and FIG.

Next, the operation will be described.
Similar to the case of the third embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 depending on the difference from the predetermined target value, By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 172, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the amount of inflow sewage to a biological water treatment apparatus is adjusted according to the measured value, and an anaerobic tank 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 adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Moreover, according to this embodiment 172, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 172, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 173.
FIG. 173 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 173 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification from outside the system. As a means to detect the amount of inflowing phosphorus, it is 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. The apparatus is configured to adjust the amount of inflow sewage. In FIG. 173, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the adjuster 23 and the output value of the adjuster 128. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 128 through the signal line 128a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 5 and FIG.

Next, the operation will be described.
As in the case of the fifth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 nitrate nitrogen concentration of the sewage and the nitrate nitrogen concentration of the effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 173, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the amount of inflow sewage to a biological water treatment apparatus is adjusted according to the measured value, and an anaerobic tank 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 adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 173, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Further, 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 which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 174.
FIG. 174 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 174 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and is used as a means for detecting the amount of phosphorus flowing from outside the system. It is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the sewage flowing into the reaction tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. It is composed. In FIG. 174, each component is the same as or equivalent to that shown in FIG. 7 and FIG.

Next, the operation will be described.
Similarly to the case of the seventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the inflow-anoxic tank bypass inflow pump 12.
Further, 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 oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 174, the anaerobic tank which measures the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2, adjusts the amount of inflow sewage into a biological water treatment apparatus 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 tank 4 and the amount of phosphorus discharged is adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Moreover, according to this embodiment 174, 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 that the amount of sewage flowing into the anoxic tank 5 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 174, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 175.
FIG. 175 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 175 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the bioreactor and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. Is configured. In FIG. 175, reference numeral 200 denotes an arithmetic unit 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 in accordance with the output value of the regulator 24 and the output value of the regulator 128. It is. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 128 through the signal line 128a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 9 and FIG.

Next, the operation will be described.
Similarly to the case of the ninth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 nitrate nitrogen concentration of the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 175, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, the amount of inflow sewage to a biological water treatment apparatus is adjusted according to the measured value, and an anaerobic tank 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 adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 175, since the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 175, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 176 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the bioreactor and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system. Is configured. In FIG. 176, an arithmetic unit 200 outputs a signal to the inflow pump 15 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 regulator 25 and the output value of the regulator 128. It is. The arithmetic unit 200 is connected to the signal line 25a via the signal line 25b, the regulator 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 in FIGS. 11 and 171 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the eleventh embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having 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 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 nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Further, according to this embodiment 176, the concentration of phosphoric acid 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, thereby anaerobic tank 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 adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An 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 bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 176, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 177 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the biological reaction tank as a means to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The apparatus is configured as described above. In FIG. 177, reference numeral 200 denotes an arithmetic unit that outputs a signal to the inflow pump 15 that sets the inflow sewage amount to the biological water treatment device to a predetermined value in accordance with the output value of the regulator 26 and the output value of the regulator 128. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 128 through the signal line 128a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS. 13 and 171, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the thirteenth embodiment, the amount of sewage flowing into the anoxic tank 5 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 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 the biological reaction tank 2 is measured, and the oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect which can reduce reliably is acquired. Further, according to this embodiment 177, 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 biological water treatment apparatus is adjusted according to the measured value, thereby anaerobic tank. 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 adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 177, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 177, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 178.
FIG. 178 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 178 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the biological reaction tank as a means to control the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the biological water treatment system The apparatus is configured as described above. In FIG. 178, reference numeral 200 denotes an arithmetic unit that outputs to the inflow pump 15 a signal having a predetermined value for the amount of sewage flowing into the biological water treatment device in accordance with the output value of the regulator 27 and the output value of the regulator 128. It is. The arithmetic unit 200 is connected to the signal line 27a via the signal line 27b, the regulator 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 in FIGS. 15 and 171 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the fifteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a 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 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 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 178, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage amount to a biological water treatment apparatus is adjusted according to the measured value, and an anaerobic tank 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 adjusted, so that even if the flow rate or concentration of sewage flowing from outside the system changes, it flows out of the system. An effect of reliably reducing the amount of phosphorus to be obtained is obtained.
Further, according to this embodiment 178, the amount of sewage flowing into the biological water treatment apparatus is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without being affected is obtained. Furthermore, according to this Embodiment 178, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the biological water treatment apparatus, the amount of organic matter supplied to the anaerobic tank 5 is reduced. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 is obtained without affecting.

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

Embodiment 179.
FIG. 179 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 179 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, 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 liquid mixture in the inside, and 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. 179, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the first settling tank 1.

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of 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, and 121 is a phosphoric acid phosphorus concentration meter. An adjuster that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value 142 and the target value set in the setter 131, and 200 is the adjuster 21. Is a computing unit that outputs a signal to the first settling tank inflow pump 14 that sets the amount of sewage flowing into the first settling tank 1 to a predetermined value according to the output value of the first settling tank 121 and the output value of the regulator 121. The phosphoric acid phosphorus concentration meter 142 is provided in the anaerobic tank 4. The regulator 121 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the setting device 131 via the signal line 131a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the regulator 121 via the signal line 142a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (8.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the regulator 121 is transmitted to the computing unit 200 via the signal line 121a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 according to an expression similar to the expression (24.1), for example, according to the output value of the regulator 21 and the output value of the regulator 121. Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Moreover, if the measured value of 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 settling basin 1 first, and the organic matter into the anaerobic tank 4 is increased. Supply volume increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the settling basin 1 is decreased first, so that the amount of sewage flowing into the anaerobic tank 4 is decreased and the amount of sewage flowing into the anaerobic tank 4 is decreased. Organic 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 tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this embodiment 179, the phosphoric acid phosphorus concentration of the sewage in the mixed liquid in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 according to the difference from 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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.
Further, according to this embodiment 179, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 179, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 179, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 180. FIG.
FIG. 180 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 180 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. It is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage in the mixed solution, 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. is there. In FIG. 180, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 22 and the output value of the regulator 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 4 and FIG.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to the embodiment 180, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the anaerobic tank 5 is adjusted, so even if the amount or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the system is reliably reduced. The effect that can be obtained. Furthermore, according to this Embodiment 180, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first sedimentation tank 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 180, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 180, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 180, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 181. FIG.
FIG. 181 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 181 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect sewage, a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage in the anaerobic tank is used to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. The apparatus is configured as described above. In FIG. 181, an arithmetic unit 200 outputs a signal to the first settling basin inflow pump 14 with a predetermined value of the amount of sewage flowing into the first settling basin according to the output value of the regulator 23 and the output value of the regulator 121. It is. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 121 through the signal line 121a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 6 and 179, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 181, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 181, the sewage phosphoric acid phosphorus density | concentration in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first sedimentation basin 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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.
Further, according to this embodiment 181, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 181, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 181, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 182.
FIG. 182 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 182 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. It is equipped with a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the 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 first sedimentation tank. In FIG. 182, each component is the same as or equivalent to that indicated by the same reference numeral in FIG. 8 and FIG. 179, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 182, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 182, the sewage phosphoric acid phosphorus density | concentration in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first sedimentation tank 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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.
Further, according to this embodiment 182, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 182, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 182, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 183.
FIG. 183 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 183 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount 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 adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. . In FIG. 183, reference numeral 200 denotes an operation for outputting a signal having a predetermined value for the amount of sewage flowing into the first sedimentation basin 1 to the first sedimentation basin inflow pump 14 in accordance with the output value of the regulator 24 and the output value of the regulator 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 10 and 179 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 183, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 183, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage quantity to the first sedimentation tank 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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.
Further, according to this embodiment 183, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 183, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 183, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 184.
FIG. 184 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 184 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount 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 adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. . In FIG. 184, reference numeral 200 denotes an arithmetic unit that adjusts the output to the first settling tank inflow pump 14 in accordance with the output value of the regulator 25 and the output value of the regulator 121. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 12 and 179 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 184, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 according to the difference from 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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.
Further, according to this embodiment 184, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 184, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 184, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 185.
FIG. 185 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 185 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage in the mixture, and configured the device to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin Is. In FIG. 185, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 26 and the output value of the regulator 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 121 through the signal line 121a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 14 and 179, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

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 the oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this embodiment 185, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the inflow sewage amount to the first settling basin 1 according to the difference with 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 the amount of phosphorus discharged is kept constant, so the flow rate and concentration of 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 185, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 185, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the settling basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 185, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 186.
FIG. 186 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 186 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage in the mixture, and configured the device to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin Is. In FIG. 186, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling tank 1 in accordance with the output value of the adjuster 27 and the output value of the adjuster 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 16 and 179 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 179, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 186, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 186, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 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, so the flow rate and concentration of 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.
Further, according to this embodiment 186, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 186, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the settling basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 186, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 187.
FIG. 187 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 187 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and an anaerobic tank as a means for detecting the phosphorus discharge amount It is equipped with a redox potentiometer that measures the redox potential of sewage in the mixed liquid in the inside, 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. is there. In FIG. 187, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Reference numeral 152 denotes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the anaerobic tank 4, 132 denotes a setter that sets a target value of the oxidation-reduction potential, and 122 denotes a measurement value of the oxidation-reduction potentiometer 152. And a regulator that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the value and the target value set in the setter 132, and 200 is the output value of the regulator 21. This is an arithmetic unit that outputs a signal to the first settling basin inflow pump 14 that sets the amount of sewage flowing into the first settling basin 1 to a predetermined value according to the output value of the regulator 122. The oxidation-reduction potentiometer 152 is provided in the anaerobic tank 4. The regulator 122 is connected to the oxidation-reduction potentiometer 152 via the signal line 152a and to the setting unit 132 via the signal line 132a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 122 through the signal line 122a, and the first sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 liquid in the anaerobic tank 4 is measured by the oxidation-reduction potentiometer 152, and the measured value is transmitted to the regulator 122 via the signal line 152a. Further, the target value set in the setting device 132 is transmitted to the adjuster 122 through the signal line 132a. The regulator 122 determines the amount of sewage flowing into the anaerobic tank 4 according to a formula similar to the formula (9.1), for example, according to the difference between the measured value of the oxidation-reduction potential and a predetermined target value. Output a signal. The output of the regulator 122 is transmitted to the arithmetic unit 200 via the signal line 122a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 according to an expression similar to the expression (24.1), for example, according to the output value of the regulator 21 and the output value of the regulator 122. Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Further, if the measured value of the oxidation-reduction potential is larger than the target value, the amount of sewage flowing into the anaerobic tank 4 is increased by increasing the amount of sewage flowing into the first settling basin 1, and supplying organic matter to the anaerobic tank 4. The amount increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the other hand, if the measured value of the oxidation-reduction potential is smaller than the target value, the amount of sewage flowing into the anaerobic tank 4 is reduced due to a decrease in the amount of sewage flowing into the settling tank 1 at first, and organic matter entering the anaerobic tank 4 is reduced. Supply volume decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to this 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 tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured The effect which can be reduced is acquired. Furthermore, according to this Embodiment 187, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 187, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 187, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 187, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 188.
FIG. 188 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 188 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. A redox potentiometer that measures the redox potential of sewage in the mixed solution is provided, 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 tank . Reference numeral 200 denotes an arithmetic unit that outputs a signal to the first settling basin inflow pump 14 according to the output value of the adjuster 22 and the output value of the adjuster 121, with a predetermined value for the amount of sewage flowing into the first settling basin 1. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 122 through the signal line 122a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 4 and 187 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 188, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to the difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 188, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 188, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 188, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 188, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 189.
FIG. 189 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 189 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount A redox potentiometer that measures the redox potential of the sewage in the mixed solution in the anaerobic tank as a means to detect sewage and adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank The apparatus is configured as follows. In FIG. 189, reference numeral 200 denotes an operation for outputting 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 adjuster 23 and the output value of the adjuster 122. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 122 through the signal line 122a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 6 and FIG.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 189, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the effluent water are measured, and the calculated value of the difference between them is calculated. The amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value. Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 189, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 189, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted is given. Furthermore, according to this embodiment 189, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 189, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 190.
FIG. 190 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 190 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. An oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the inside is provided, 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 settling tank. In FIG. 190, each component is the same as or equivalent to that shown in FIG. 8 and FIG. 187 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 187, the amount of sewage flowing into the first settling basin is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the 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 oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 190, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 190, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 190, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 190, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 191.
FIG. 191 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 191 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount A redox potentiometer for measuring the redox potential of sewage in the liquid is provided, 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. 191, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 24 and the output value of the regulator 122. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 122 through the signal line 122a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 10 and 187 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 191, the nitrate nitrogen concentration of the discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 191, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 191, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 191, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 191, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 192.
FIG. 192 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 192 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount A redox potentiometer for measuring the redox potential of sewage in the liquid is provided, 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. 192, 200 adjusts the output to the first settling tank inflow pump 14 with a signal that makes the inflow sewage amount to the first settling tank 1 a predetermined value according to the output value of the adjuster 25 and the output value of the adjuster 122. It is a computing unit. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 122 through the signal line 122a, and the inflow pump 15 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 12 and 187, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 192, the concentration of nitrate nitrogen in effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 192, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this Embodiment 192, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 192, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 192, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 193.
FIG. 193 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 193 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 is equipped with a redox potentiometer that measures the redox potential of sewage in the mixed liquid in the inside, 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. is there. In FIG. 193, 200 is a calculation that outputs a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 26 and the output value of the regulator 122. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 122 through the signal line 122a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 14 and 187 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 the oxygen-free is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 193, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 is determined according to the difference from a predetermined target value. If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 193, since the amount of sewage flowing into the sedimentation basin 1 is adjusted first and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 193, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 193, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 194.
FIG. 194 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 194 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 is equipped with a redox potentiometer that measures the redox potential of sewage in the mixed liquid in the inside, 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. is there. In FIG. 194, reference numeral 200 denotes an arithmetic unit that adjusts the output to the first settling tank inflow pump 14 in accordance with the output value of the regulator 27 and the output value of the regulator 122. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 122 through the signal line 122a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 16 and 187 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 187, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 194, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 194, the oxidation-reduction potential of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and the amount of sewage flowing into the first settling basin 1 according to the difference from the predetermined target value If 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 flow rate and concentration of sewage flowing from outside the system changes. However, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
In addition, according to this embodiment 194, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 194, since the amount of inflow sewage to the anaerobic tank 4 is adjusted by adjusting the amount of inflow sewage to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 194, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 195.
FIG. 195 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 195 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and an anaerobic tank as a means for detecting the phosphorus discharge amount It is equipped with a phosphorus content meter that measures the phosphorus content of the phosphorus accumulating bacteria in the mixed liquid in the 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 first sedimentation basin. It is a thing. In FIG. 195, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to control the flow rate of sewage flowing into the initial settling tank 1.

Further, 162 is a phosphorus content measuring device for measuring the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4, 133 is a setting device for setting a target value of the phosphorus content, and 123 is a phosphorus content measuring device. An adjuster that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value 162 and the target value set in the setter 133, 200 is the adjuster 21. Is a calculator 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 in accordance with the output value of The phosphorus content measuring device 162 is provided in the anaerobic tank 4. The regulator 123 is connected to the phosphorus content measuring device 162 via the signal line 162a and to the setting device 133 via the signal line 133a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 the phosphorus content measuring device 162, and the measured value is transmitted to the regulator 123 via the signal line 162a. Further, the target value of the phosphorus content set in the setting unit 133 is transmitted to the adjuster 123 through the signal line 133a. The regulator 123 determines the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (10.1) according to the difference between the measured value of the phosphorus content and a predetermined target value. Output a signal. The output of the adjuster 123 is transmitted to the arithmetic unit 200 via the signal line 123a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 21 and the output value of the regulator 123, for example, according to an equation similar to the equation (24.1). Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Moreover, if the measured value of phosphorus content is smaller than a target value, the amount of sewage flowing into the anaerobic tank 4 will increase due to an increase in the amount of sewage flowing into the first settling basin 1 and supply of organic matter to the anaerobic tank 4 The amount increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphorus content is larger than the target value, the amount of sewage flowing into the anaerobic tank 4 will decrease due to a decrease in the amount of sewage flowing into the settling basin 1 at first. Supply volume decreases. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to this 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 tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this embodiment 195, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first sedimentation basin 1 according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.
Further, according to this embodiment 195, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 195, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 195, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 196.
FIG. 196 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 196 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. A device that is equipped with a phosphorus content meter that measures the phosphorus content of phosphorus-accumulating bacteria in the mixed solution, 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. It is. In FIG. 196, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 22 and the output value of the regulator 123. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 4 and 195 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to the difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 196, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first settling basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.
Moreover, according to this Embodiment 196, 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 which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 196, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 196, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 197.
FIG. 197 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 197 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect, a phosphorus content measuring device that measures the phosphorus content of phosphorus accumulating bacteria in the mixed solution in the anaerobic tank is provided. The device is configured to adjust. In FIG. 197, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal that sets the amount of sewage flowing into the first settling basin 1 to a predetermined value in accordance with the output value of the regulator 23 and the output value of the regulator 123. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 6 and 195 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 197, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this embodiment 197, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first sedimentation basin 1 according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.
Moreover, according to this Embodiment 197, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 197, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 197, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 198.
FIG. 198 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 198 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. It is equipped with a phosphorus content meter that measures the phosphorus content of the phosphorus accumulating bacteria in it, 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. 198, each component is the same as or equivalent to that shown in FIG. 8 and FIG.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 198, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to measure the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. 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 first inflow into the settling basin 1 according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 198, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted is given. Furthermore, according to this embodiment 198, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 198, a part of the sewage flowing out of the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 199.
FIG. 199 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 199 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount It is equipped with a phosphorus content meter that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, 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. is there. In FIG. 199, 200 is a calculation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 24 and the output value of the regulator 123. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 10 and FIG.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 199, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first sedimentation basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 this embodiment 199, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. 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 settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 199, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 200. FIG.
FIG. 200 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 200 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount It is equipped with a phosphorus content meter that measures the phosphorus content of phosphorus accumulating bacteria in the liquid, 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. is there. In FIG. 200, an arithmetic unit 200 outputs a signal to the first settling basin inflow pump 14 in accordance with the output value of the adjuster 25 and the output value of the adjuster 123. It is. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 12 and 195 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 200, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 200, the phosphorus content of the phosphorus accumulating bacteria in the mixed solution in the anaerobic tank 4 is measured, and the flow into the first sedimentation basin 1 according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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.
Moreover, according to this embodiment 200, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 200, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 200, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 201. FIG.
FIG. 201 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 201 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 is equipped with a phosphorus content meter that measures the phosphorus content of the phosphorus accumulating bacteria in the mixed liquid in the 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 first sedimentation basin. It is a thing. In FIG. 201, reference numeral 200 denotes an operation for outputting a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 to the first settling basin inflow pump 14 in accordance with the output value of the regulator 26 and the output value of the regulator 123. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the 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 detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 201, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen free oxygen is determined according to the difference between the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, 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 flow into the first sedimentation basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged 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 this embodiment 201, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 201, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 201, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 202. FIG.
FIG. 202 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 202 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 is equipped with a phosphorus content meter that measures the phosphorus content of the phosphorus accumulating bacteria in the mixed liquid in the 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 first sedimentation basin. It is a thing. In FIG. 202, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 27 and the output value of the regulator 123. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 123 through the signal line 123a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 16 and 195 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 195, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 202, the total nitrogen concentration 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. 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 can be obtained even when the flow rate or concentration of sewage flowing from outside the system fluctuates. Furthermore, 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 flow into the first settling basin 1 is reduced according to the difference from the predetermined target value. By adjusting the amount of water and adjusting the amount of sewage flowing into the anaerobic tank 4, the amount of organic matter supplied to the anaerobic tank 4 is adjusted, and the amount of phosphorus discharged is kept constant. Even in this case, the effect of reliably reducing the amount of phosphorus flowing out of the system can be obtained.
Moreover, according to this Embodiment 202, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 202, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 202, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 203. FIG.
FIG. 203 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 203 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and an anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a device that calculates the difference between the concentration of phosphoric acid phosphorus in the mixture and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank, and the amount of sewage flowing into the anoxic tank and the amount flowing into the first sedimentation basin The apparatus is configured to adjust the amount of water. In FIG. 203, reference numeral 14 denotes an initial settling tank inflow pump 14 provided in the pipe a in order to adjust the flow rate of sewage flowing into the first settling tank 1.

142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration concentration of sewage in the mixed solution in the anaerobic tank 4, and 141 is a phosphoric acid phosphorus concentration for measuring the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2. 181 is a computing unit that calculates the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, and 134 is the mixing in the anaerobic tank 4. The setter 124 for setting the target value of the difference between the phosphoric acid phosphorus concentration of sewage in the liquid and the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank was set in the calculator 181 and the setter 134. A regulator 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 to the computing unit 200, and the output value of the regulator 21 and the output value of the regulator 124. In response, the amount of sewage flowing into the first settling basin 1 is set to a predetermined value. A calculator for outputting a signal to the primary sedimentation inflow pump 14. 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 computing unit 181 is connected to the phosphoric acid phosphorus concentration meter 142 via the signal line 142a and to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The adjuster 124 is connected to the arithmetic unit 181 via the signal line 181a and to the setting unit 134 via the signal line 134a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 124 through the signal line 124a, and the first sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the calculator 181 via the signal line 141a. The calculator 181 calculates the difference between the phosphoric acid phosphorus concentration of the sewage in the mixed liquid in the anaerobic tank 4 and the phosphorous phosphorus concentration of the sewage flowing into the biological reaction tank 2 according to, for example, the formula (11.1).

  The output of the arithmetic unit 181 is transmitted to the adjuster 124 through the signal line 181a. Further, the target value set in the setting unit 134 is transmitted to the adjuster 124 through the signal line 134a. The regulator 124 calculates the difference between the phosphoric phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank 2 and a predetermined target value. In response to the difference, a signal is output that sets the amount of sewage flowing into the anaerobic tank 4 according to a formula similar to the formula (11.2), for example. The output of the adjuster 124 is transmitted to the arithmetic unit 200 via the signal line 124a.

  The computing unit 200 obtains the amount of sewage flowing into the biological water treatment apparatus 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 124. Is output. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
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, the first settling basin 1 is entered. As the amount of inflow sewage increases, the amount of inflow sewage to the anaerobic tank 4 increases and the amount of organic matter supplied to the anaerobic tank 4 increases. As a result, phosphorus discharge increases and the amount of phosphorus removal increases. Conversely, if the calculated value of the difference between the phosphoric acid phosphorus concentration of 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 larger than the target value, the flow into the first settling tank 1 As the amount of sewage 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, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

As described above, according to the embodiment 203, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out of the system is surely The effect which can be reduced is acquired. Furthermore, according to this Embodiment 203, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Moreover, according to this embodiment 203, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 203, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 203, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 204. FIG.
FIG. 204 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 204 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. Equipped with a device for calculating the difference between the concentration of phosphoric acid phosphorus in the mixture and the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reaction tank 2, the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank The apparatus is configured to adjust the angle. In FIG. 204, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal that sets the inflow sewage amount to the first settling tank 1 to a predetermined value in accordance with the output value of the adjuster 22 and the output value of the adjuster 124. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 124 through the signal line 124a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 4 and FIG.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 204, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the flow to the oxygen-free tank 5 is determined according to the difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Further, according to this embodiment 204, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 204, the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted is given. Furthermore, according to this embodiment 204, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 204, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 205. FIG.
FIG. 205 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 205 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect sewage, it is equipped with a device that calculates the difference between the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank. The device is configured to adjust the amount of water and the amount of sewage flowing into the first settling basin. In FIG. 205, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 23 and the output value of the regulator 124. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 124 through the signal line 124a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 6 and 203 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 205, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the discharged water are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 205, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 205, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 205, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 206. FIG.
FIG. 206 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 206 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. Equipped with a device that calculates the difference between the phosphoric acid concentration of the sewage in the sewage and the phosphoric acid concentration of 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.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 206, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 206, 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 206, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 206, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 206, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 207.
FIG. 207 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 207 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a device that calculates the difference between the phosphoric acid phosphorus concentration of sewage in the sewage and the sewage phosphoric acid phosphorus concentration flowing into the biological reaction tank. The apparatus is configured to adjust the angle. In FIG. 207, 200 is a calculation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 24 and the output value of the regulator 124 It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 124 through the signal line 124a, and the first sedimentation tank inflow pump 14 through the 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.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 207, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 207, the phosphoric acid phosphorus concentration of the sewage in the liquid mixture 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 207, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 207, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 207, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 208. FIG.
FIG. 208 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 208 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount Equipped with a device that calculates the difference between the phosphoric acid phosphorus concentration of sewage in the sewage and the sewage phosphoric acid phosphorus concentration flowing into the biological reaction tank. The apparatus is configured to adjust the angle. In FIG. 208, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal that sets the inflow sewage amount to the first settling tank 1 to a predetermined value according to the output value of the adjuster 25 and the output value of the adjuster 124. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 124 through the signal line 124a, and the first sedimentation tank inflow pump 14 through 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 203, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 208, the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 and the phosphoric acid phosphorus concentration of 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 208, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 208, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 208, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 209.
FIG. 209 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 209 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 device, and detects the phosphorus discharge amount. As a means to calculate the difference between the phosphorous phosphorus concentration of sewage in the mixed solution in the anaerobic tank and the phosphorous phosphorus concentration of sewage flowing into the biological reaction tank, The device is configured to adjust the amount of sewage flowing into the first settling basin. In FIG. 209, an arithmetic unit 200 outputs a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin according to the output value of the regulator 26 and the output value of the regulator 124. It is. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 124 through the signal line 124a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 203, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 203, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 209, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and oxygen free according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this embodiment 209, 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 209, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 209, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 209, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 210. FIG.
FIG. 210 is a block diagram showing a biological water treatment apparatus control 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 the biological reaction tank as means for detecting the amount of nitrogen flowing into the biological water treatment apparatus, and detects the phosphorus discharge amount. As a means, 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 phosphorous phosphorus concentration of the sewage flowing into the biological reaction tank is provided. The device is configured to adjust the amount of sewage flowing into the settling basin. In FIG. 210, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the regulator 27 and the output value of the adjuster 124. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 27b, the regulator 124 through the signal line 124a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 16 and 203, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 203, the amount of sewage flowing into the first settling basin is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 210, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 210, the phosphoric acid phosphorus concentration of the sewage in the mixed liquid 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 anaerobic tank 4 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 amount is kept constant, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of phosphorus flowing out from the system can be reliably reduced.
Further, according to this embodiment 210, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 210, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 at the beginning, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 210, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 211. FIG.
FIG. 211 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 211 of the present invention. The present embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and an anaerobic tank as a means for detecting the phosphorus discharge amount A device for estimating the phosphoric acid phosphorus concentration of the sewage in the mixed liquid is configured, 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. 211, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 142 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of 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, and 171 is the inside of the anaerobic tank 4. A storage circuit 182 stores data on the phosphoric acid phosphorus concentration of sewage in the mixed solution, and the phosphorous phosphorus of sewage in the mixed solution in the anaerobic tank 4 using the data on the concentration of phosphoric acid phosphorus stored in the storage circuit 171. An arithmetic unit 121 that estimates the concentration is a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the estimated value of the phosphoric acid phosphorus concentration meter 142 and the target value set in the setter 131. The controller 200 outputs to the computing unit 200, and the signal 200 sets a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 21 and the output value of the regulator 121. 14 is an arithmetic unit that outputs the data. 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 a signal line 142a. The computing unit 182 is connected to the storage circuit 171 through the signal line 171a. The regulator 121 is connected to the arithmetic unit 182 via the signal line 182a and to the setting unit 131 via the signal line 131a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 the phosphoric acid phosphorus concentration meter 142, and the measured value is transmitted to the storage circuit 171 via the signal line 142a. The computing unit 182 estimates the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank 4 at an arbitrary time using the data of the phosphoric acid phosphorus concentration stored in the storage circuit 171. This can be easily performed using a statistical analysis method such as a least square method. The phosphorous acid phosphorus concentration data necessary for the analysis is transmitted from the storage circuit 171 via the signal line 171a. The estimated value of the calculator 182 is transmitted to the adjuster 121 via the signal line 182a. Further, the target value set in the setting device 131 is transmitted to the adjusting device 121 through the signal line 131a. The regulator 121 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (8.1) according to the difference between the estimated value of the phosphoric acid phosphorus concentration and the predetermined target value. Is output. The output of the regulator 121 is transmitted to the computing unit 200 via the signal line 121a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 according to an expression similar to the expression (24.1), for example, according to the output value of the regulator 21 and the output value of the regulator 121. Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Further, if the estimated value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is increased, so that the amount of sewage flowing into the anaerobic tank 4 is increased and the organic matter entering the anaerobic tank 4 is increased. Supply volume increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the estimated value of the phosphoric acid phosphorus concentration is larger than the target value, the amount of sewage flowing into the first settling basin 1 is decreased, the amount of sewage flowing into the anaerobic tank 4 is decreased, and Organic supply is reduced. As a result, phosphorus discharge is reduced and the amount of phosphorus removal is reduced.

As described above, according to this embodiment 211, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 211, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Moreover, according to this Embodiment 211, since the amount of sewage which flows into the sedimentation basin 1 first is adjusted and the amount of sewage which flows into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 211, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 211, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 212. FIG.
FIG. 212 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 212 of the present invention. This embodiment includes an oxidation-reduction potentiometer that measures the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and as a means for detecting the phosphorus discharge amount in the anaerobic tank. A device for estimating the phosphoric acid phosphorus concentration of sewage in the mixed solution 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 first settling basin. In FIG. 212, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 22 and the output value of the regulator 121 It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 121 through the signal line 121a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 212, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 212, 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 in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 212, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that 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 can be adjusted without giving it is obtained. Furthermore, according to this embodiment 212, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 212, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 213.
FIG. 213 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 213 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed liquid in the oxygen-free tank as a means for detecting the denitrification amount, and the phosphorus discharge amount As a means to detect sewage, it is equipped with a device that estimates the phosphoric acid phosphorus concentration of sewage in the mixed solution in the anaerobic tank, and adjusts the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank Is configured. In FIG. 213, reference numeral 200 denotes an operation for outputting a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 to the first settling basin inflow pump 14 in accordance with the output value of the regulator 23 and the output value of the regulator 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 121 through the signal line 121a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 6 and 211, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 213, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 213, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and in the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 213, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 213, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 213, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 214. FIG.
FIG. 214 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 214 of the present invention. This embodiment includes a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and the mixed solution in the anaerobic tank as a means for detecting the phosphorus discharge amount. It is equipped with a device for estimating the concentration of phosphoric acid phosphorus in the 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 first sedimentation tank. In FIG. 214, each component is the same as or equivalent to the component shown with the same reference numeral in FIGS.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 214, the amount of sewage flowing into the settling basin 1 is adjusted first. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 214, the concentration of nitrate nitrogen in sewage in the mixed solution in the oxygen-free tank 5 is measured, and the accumulated data of nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 214, 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 in the mixed solution in the anaerobic tank 4. Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 214, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 211, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 214, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

Embodiment 215.
FIG. 215 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 215 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount A device for estimating the phosphoric acid phosphorus concentration 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 first sedimentation basin. In FIG. 215, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the adjuster 24 and the output value of the adjuster 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 10 and 211, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 215, the concentration of nitrate nitrogen in the discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 215, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 215, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 215, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 215, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 216. FIG.
FIG. 216 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 216 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water as a means for detecting the amount of nitrogen flowing out of the system, and mixing in the anaerobic tank as a means for detecting the phosphorus discharge amount A device for estimating the phosphoric acid phosphorus concentration 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 first sedimentation basin. In FIG. 216, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 25 and the output value of the regulator 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS. 12 and 211, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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 varies. Furthermore, according to this Embodiment 216, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 216, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 216, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 216, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 217. FIG.
FIG. 217 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 217 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 estimating the phosphoric acid phosphorus concentration of the sewage in the mixed liquid is configured, 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. 217, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 26 and the output value of the regulator 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 121 through the signal line 121a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those denoted by the same reference numerals in FIGS. 14 and 211, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 the oxygen-free is determined according to the difference between the target value of the total nitrogen concentration of the effluent water determined in advance. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 217, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, In the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus density | concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 217, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 217, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 217, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 218. FIG.
FIG. 218 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 218 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 estimating the phosphoric acid phosphorus concentration of the sewage in the mixed liquid is configured, 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. 218, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the adjuster 27 and the output value of the adjuster 121. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 121 through the signal line 121a, and the first sedimentation tank inflow pump 14 through 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 211, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, as in the case of the embodiment 211, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 218, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 218, the phosphoric acid phosphorus density | concentration of the sewage in the liquid mixture in the anaerobic tank 4 is measured, and in the liquid mixture in the anaerobic tank 4 using the data of the accumulated phosphoric acid phosphorus concentration Estimating the phosphoric acid phosphorus concentration of sewage in the sewage, and adjusting the amount of sewage flowing into the anaerobic tank 4 by adjusting the amount of sewage flowing into the settling basin 1 according to the difference between the estimated value and a predetermined target value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and keeping the phosphorus discharge amount constant, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. An effect is obtained.
Further, according to this embodiment 218, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage bypassed into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 218, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 at the beginning, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 218, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be.

Embodiment 219.
FIG. 219 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 219 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing out of the system. This system is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water, 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. is there. In FIG. 219, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 146 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the discharged water, 135 is a setting device for setting a target value of the phosphoric acid phosphorus concentration, and 125 is a measurement value and setting device 135 for the phosphoric acid phosphorus concentration meter 146. 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 the calculator 200, and 200 indicates the output value of the controller 21 and the controller 125. It is a regulator that outputs a signal that sets the amount of sewage flowing into the first settling basin 1 to a predetermined value according to the output value to the first settling basin inflow pump 14. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The adjuster 125 is connected to the phosphoric acid phosphorus concentration meter 146 via the signal line 146a and the setter 135 via the signal line 135a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 125 via the signal line 146a. Further, the target value set in the setting device 135 is transmitted to the adjusting device 125 via the signal line 135a. The regulator 125 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (12.1) in accordance with the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the regulator 125 is transmitted to the computing unit 200 via the signal line 125a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 to a value obtained in accordance with a formula similar to the formula (24.1), for example, according to the output value of the regulator 21 and the output value of the regulator 125. Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Moreover, if the measured value of the phosphoric acid phosphorus concentration is larger 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 settling basin 1 first, and the organic matter into the anaerobic tank 4 increases. Supply volume increases. As a result, the phosphorus discharge amount increases and the phosphorus removal amount increases. On the contrary, if the measured value of the phosphoric acid phosphorus concentration is smaller than the target value, the amount of sewage flowing into the first settling basin 1 is decreased, so that the amount of sewage flowing into the anaerobic tank 4 is decreased and the amount of sewage flowing into the anaerobic tank 4 is decreased. Organic supply is reduced. As a result, the phosphorus discharge amount decreases and the phosphorus removal amount decreases.

As described above, according to this 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 tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this embodiment 220, the phosphoric acid phosphorus concentration of the discharged water is measured, and the amount of sewage flowing into the first settling basin 1 is adjusted according to the difference from the predetermined target value to the anaerobic tank 4. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 220, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 220, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 at the beginning, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 220, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 220. FIG.
FIG. 220 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 220 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and means for detecting the amount of phosphorus flowing out of the system The system is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. In FIG. 220, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal that sets the amount of sewage flowing into the first settling basin 1 to a predetermined value according to the output value of the adjuster 22 and the output value of the adjuster 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 4 and 219 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 220, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to the difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this embodiment 220, the phosphoric acid phosphorus concentration of the discharged water is measured, and the amount of sewage flowing into the first settling basin 1 is adjusted according to the difference from the predetermined target value to the anaerobic tank 4. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 220, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 220, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 at the beginning, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 220, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 221. FIG.
FIG. 221 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 221 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification outside the system. As a means of detecting the amount of phosphorus flowing out, a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water is provided, and the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin are adjusted. The apparatus is configured as follows. In FIG. 221, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 23 and the output value of the regulator 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 6 and 219 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 221, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if 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 phosphoric acid phosphorus density | concentration of effluent water is measured, the amount of inflow sewage to the first settling basin 1 is adjusted according to the difference with the predetermined target value, and the anaerobic tank 4 is adjusted. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 221, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 221, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 221, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 222. FIG.
FIG. 222 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 222 of the present invention. This embodiment is equipped with a device that estimates the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank, and measures the phosphoric acid phosphorus concentration of the discharged water as a means of detecting the amount of phosphorus flowing out of the system. The apparatus is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first settling basin. In FIG. 222, each component is the same as or equivalent to the component denoted by the same reference numeral in FIGS. 8 and 219, and thus detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 222, the concentration of nitrate nitrogen in sewage in the mixed solution in the oxygen-free tank 5 is measured, and the accumulated data of nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this embodiment 222, the phosphoric acid phosphorus concentration of the discharged water is measured, and the amount of sewage flowing into the first settling basin 1 is adjusted according to the difference from the predetermined target value to the anaerobic tank 4. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 222, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 222, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 222, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 223.
FIG. 223 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 223 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharge water, 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. 223, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 24 and the output value of the regulator 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 10 and 219 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 223, the concentration of nitrate nitrogen in the discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 223, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the first settling basin 1 is adjusted according to the difference with a predetermined target value, and the anaerobic tank 4 is adjusted. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Moreover, according to this Embodiment 223, since the amount of sewage flowing into the sedimentation basin 1 is adjusted first and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 223, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 223, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 224.
FIG. 224 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 224 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharge water, 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. 224, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the adjuster 25 and the output value of the adjuster 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 12 and 219 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 224, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 224, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the difference with the predetermined target value, the inflow sewage amount to the first settling basin 1 is adjusted first, and the anaerobic tank 4 is set. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 224, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 224, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 224, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 225.
FIG. 225 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 225 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 out of the system. As a means, it is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of discharged water, 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. 225, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 26 and the output value of the regulator 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 14 and 219 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 the oxygen-free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 225, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the difference with the predetermined target value, the inflow sewage amount to the first settling tank 1 is adjusted first, and the anaerobic tank 4 is set. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Moreover, according to this embodiment 225, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 225, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 225, a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, so that there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 226.
FIG. 226 is a block diagram showing a control device for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. This system is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water, 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. is there. In FIG. 226, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 27 and the output value of the regulator 125. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 125 through the signal line 125a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 16 and 219 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 219, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 226, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 226, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the difference with the predetermined target value, the inflow sewage amount to the first settling tank 1 is adjusted first, and the anaerobic tank 4 is adjusted. By adjusting the amount of inflow sewage, the amount of organic matter supplied to the anaerobic tank 4 is adjusted 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 effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 226, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 226, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 226, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 227.
FIG. 227 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 227 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing out of the system. This system is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water, 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. is there. In FIG. 227, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 146 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of the effluent water, and 126 is a signal for setting the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the measured value of the phosphoric acid phosphorus concentration meter 146. The controller 200 outputs to the computing unit 200, and the signal 200 is a first sedimentation basin inflow pump that gives a predetermined value to the amount of sewage flowing into the first sedimentation basin 1 in accordance with the output value of the regulator 21 and the output value of the regulator 126. 14 is an arithmetic unit that outputs the data. The phosphoric acid phosphorus concentration meter 146 is provided in the pipe d. The regulator 126 is connected to the phosphoric acid phosphorus concentration meter 146 via a signal line 146a. The arithmetic unit 200 is connected to the signal line 21a through the signal line 21b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also transmitted to the arithmetic unit 200 via the signal line 21a and the signal line 21b.
The phosphoric acid phosphorus concentration of the discharged water is measured by the phosphoric acid phosphorus concentration meter 146, and the measured value is transmitted to the regulator 126 via the signal line 146a. The regulator 126 outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a value obtained, for example, according to an expression similar to the expression (13.1), according to the measured value of the phosphoric acid phosphorus concentration. The output of the adjuster 126 is transmitted to the arithmetic unit 200 via the signal line 126a.

  The calculator 200 sets the amount of sewage flowing into the first settling basin 1 to a value obtained by, 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. Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
In addition, depending on how large the measured value of the phosphoric acid phosphorus concentration is, the amount of sewage flowing into the settling basin 1 first increases or decreases, so that the amount of sewage flowing into the anaerobic tank 4 increases or decreases, and the organic matter into the anaerobic tank 4 increases. Supply amount 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 227, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 227, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the measured value, the inflow sewage amount to the sedimentation tank 1 is adjusted first, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
Further, according to this embodiment 227, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 227, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 227, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 228.
FIG. 228 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 228 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and means for detecting the amount of phosphorus flowing out of the system The system is configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank. In FIG. 228, reference numeral 200 denotes an operation for outputting 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 adjuster 22 and the output value of the adjuster 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 4 and 227 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 228, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and depending on the difference from the predetermined target value, By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Further, according to this embodiment 228, the phosphoric acid phosphorus concentration of the effluent is measured, and the amount of sewage flowing into the anaerobic tank 4 is adjusted by initially adjusting the amount of sewage flowing into the settling basin 1 according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
In addition, according to this embodiment 228, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 228, since the amount of inflow sewage to the anaerobic tank 4 is adjusted by adjusting the amount of inflow sewage to the settling basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 228, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 229.
FIG. 229 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 229 of the present invention. This embodiment is equipped with a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification outside the system. As a means of detecting the amount of phosphorus flowing out, a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water is provided, and the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin are adjusted. The apparatus is configured as follows. In FIG. 229, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 23 and the output value of the regulator 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 6 and FIG.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 229, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 and the nitrate nitrogen concentration of the effluent water are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 229, the phosphoric acid phosphorus density | concentration of discharge water is measured, and the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first according to the measured value By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
Further, according to this embodiment 229, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 229, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 229, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 230. FIG.
FIG. 230 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 230 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and discharged as a means for detecting the amount of phosphorus flowing out of the system. A phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of water is provided, 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. 230, each component is the same as or equivalent to that shown in FIG. 8 and FIG.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to the present embodiment 230, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to measure the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 230, the phosphoric acid phosphorus density | concentration of discharge water is measured, and the inflow sewage amount to the sedimentation tank 1 is adjusted initially according to the measured value, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
Further, according to this embodiment 230, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 230, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 230, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In the present embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the discharged water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 231. FIG.
FIG. 231 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 231 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharge water, 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. 231, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 in accordance with the output value of the adjuster 24 and the output value of the adjuster 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 10 and FIG.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 231, the concentration of nitrate nitrogen in the discharged water 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 organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 231, the phosphoric acid phosphorus density | concentration of effluent water is measured, according to the measured value, the inflow sewage amount to the sedimentation tank 1 is adjusted first, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
Moreover, according to this Embodiment 231, since the amount of sewage which flows into the sedimentation basin 1 first is adjusted and the amount of sewage which flows into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted is given. Furthermore, according to this Embodiment 231, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 231, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 232.
FIG. 232 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 232 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 phosphoric acid phosphorus concentration of the discharge water, 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. 232, reference numeral 200 denotes an operation for outputting 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 adjuster 25 and the output value of the adjuster 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 12 and FIG.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 232, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 232, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 initially according to the measured value. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
In addition, according to this embodiment 232, the amount of sewage flowing into the settling basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 232, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 232, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 233.
FIG. 233 is a block diagram showing a control apparatus for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. This system is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water, 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. is there. In FIG. 233, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 26 and the output value of the regulator 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

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 an oxygen-free according to the difference from the target value of the predetermined total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 233, the phosphoric acid phosphorus density | concentration of discharge water is measured, and the inflow sewage amount to the sedimentation basin 1 is adjusted initially according to the measured value, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
Further, according to this embodiment 233, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 233, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 233, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 234.
FIG. 234 is a block diagram showing a control apparatus for a 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 the biological reaction tank as means for detecting the amount of nitrogen flowing from outside the system, and detects the amount of phosphorus flowing out of the system. This system is equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the discharged water, 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. is there. In FIG. 234, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 27 and the output value of the regulator 126. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 126 through the signal line 126a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 16 and FIG.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 227, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 234, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 234, the phosphoric acid phosphorus density | concentration of effluent water is measured, the inflow sewage amount to the sedimentation tank 1 is adjusted initially according to the measured value, and the inflow sewage amount to the anaerobic tank 4 is adjusted. By adjusting the amount of organic matter supplied to the anaerobic tank 4 and adjusting the amount of phosphorus discharged, the amount of phosphorus flowing out of the system can be reliably reduced even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect that can be obtained.
Further, according to this embodiment 234, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 234, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 234, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In this embodiment, the amount of phosphorus flowing out of the system is detected by measuring the phosphoric acid phosphorus concentration of the effluent water, but the apparatus may be configured to measure the total phosphorus concentration.

Embodiment 235.
FIG. 235 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 235 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the bioreactor as a means to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank Is configured. In FIG. 235, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

Further, 141 is a phosphoric acid phosphorus concentration meter for measuring the phosphoric acid phosphorus concentration of sewage flowing into the biological reaction tank 2, 137 is a setter for setting a target value of the phosphoric acid phosphorus concentration of the discharged water, and 127 is a phosphoric acid phosphorus concentration. A controller that outputs a signal that sets the amount of sewage flowing into the anaerobic tank 4 to a predetermined value according to the difference between the measured value of the total 141 and the target value set in the setting device 137, and 200 is a controller. It is a calculator that outputs a signal to the first settling tank inflow pump 14 that makes the inflow sewage amount into the first settling tank 1 a predetermined value according to the output value of 21 and the output value of the regulator 127. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The adjuster 127 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a and to the setter 137 via the signal line 137a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the regulator 127 via the signal line 127a, and the initial sedimentation tank inflow pump 14 via the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value of the nitrate nitrogen concentration set in the setting device 31 is transmitted to the regulator 21 via the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the regulator 127 via the signal line 141a. Further, the target value set in the setting device 137 is transmitted to the adjuster 127 through the signal line 137a. The regulator 127 obtains the amount of sewage flowing into the anaerobic tank 4 according to, for example, a formula similar to the formula (14.1) according to the difference between the measured value of the phosphoric acid phosphorus concentration and a predetermined target value. Is output. The output of the adjuster 127 is transmitted to the arithmetic unit 200 via the signal line 127a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 to a value obtained according to an equation similar to the equation (24.1), for example, according to the output value of the regulator 21 and the output value of the regulator 127. Output a signal. The output of the arithmetic unit 200 is first transmitted to the 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
In addition, the amount of sewage flowing into the first sedimentation basin 1 will increase or decrease depending on how much the measured value of phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is larger than the target value of the phosphoric acid phosphorus concentration of the discharged water. As a result, 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.

As described above, according to this embodiment 235, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 235, the phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even when the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 235, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 235, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 235, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 236.
FIG. 236 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 236 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and means for detecting the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reactor as It is a thing. In FIG. 236, reference numeral 200 denotes an operation for outputting 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 adjuster 22 and the output value of the adjuster 127. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 127 through the signal line 127a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 4 and FIG.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 236, the oxidation-reduction potential of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen reduction tank 5 is supplied to the oxygen-free tank 5 according to a difference from a predetermined target value. By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 236, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 236, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 236, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 236, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 237.
FIG. 237 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 237 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification from outside the system. As a means of detecting the amount of inflowing phosphorus, it is 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 2, and the amount of sewage that flows into the anoxic tank and the flow into the first sedimentation tank The device is configured to adjust the amount of sewage. In FIG. 237, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 23 and the output value of the regulator 127. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 127 through the signal line 127a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 6 and 235 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / 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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 237, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the anoxic tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if 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 phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this embodiment 237, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 237, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the settling basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 237, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 238.
FIG. 238 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 238 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed liquid in the oxygen-free tank as a means for detecting the amount of denitrification, and is used as a means for detecting the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the reaction tank, and configured to adjust 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.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to the present embodiment 238, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the data of the accumulated nitrate nitrogen concentration is used to store the oxygen-free tank 5. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 238, the phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 238, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 238, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 238, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, the SS component is small in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 239.
FIG. 239 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 239 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the effluent water as a means for detecting the amount of outflow nitrogen outside the system, and a biological organism as a means for detecting the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the reaction tank, and configured to adjust 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, 200 adjusts the output to the first settling tank inflow pump 14 with 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 adjuster 24 and the output value of the adjuster 127. It is a computing unit. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 127 through the signal line 127a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 239, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 239, the phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 239, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 239, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 239, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 240. FIG.
FIG. 240 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 240 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the sewage flowing into the bioreactor, and configured the device to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank Is. In FIG. 240, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the adjuster 25 and the output value of the adjuster 127. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 127 through the signal line 127a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 12 and 235 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 240, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Further, according to this embodiment 240, the phosphoric acid phosphorus concentration of the sewage flowing into the biological reaction tank 2 is measured, and the first settling basin is determined according to the difference from the target value of the phosphoric acid phosphorus concentration of the predetermined discharge water. 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Further, according to this embodiment 240, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 235, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 240, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 241. FIG.
FIG. 241 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 241 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the bioreactor as a means to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. Is configured. In FIG. 241, reference numeral 200 denotes an operation for outputting a signal to the first settling basin inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling basin 1 in accordance with the output value of the regulator 26 and the output value of the regulator 127. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 127 through the signal line 127a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 14 and 235 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / 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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 241, the total nitrogen concentration of sewage flowing into the biological reaction tank 2 is measured, and the oxygen free oxygen is determined according to the difference from the predetermined target value of the total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 241, the phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this Embodiment 241, since the amount of sewage which flows into the sedimentation basin 1 first is adjusted and the amount of sewage which flows into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 241, since the amount of inflow sewage to the anaerobic tank 4 is adjusted by adjusting the amount of inflow sewage to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 241, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control device for a biological water treatment apparatus according to Embodiment 242 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the bioreactor as a means to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. Is configured. In FIG. 242, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the adjuster 27 and the output value of the adjuster 127. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 127 through the signal line 127a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIG. 16 and FIG.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / 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 having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 242, the total nitrogen concentration of sewage 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 242, the phosphoric acid phosphorus density | concentration of the sewage which flows into the biological reaction tank 2 is measured, and according to the difference with the target value of the phosphoric acid phosphorus density | concentration of predetermined discharge water, the first sedimentation 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 1 and adjusting the amount of sewage flowing into the anaerobic tank 4, the flow rate of sewage flowing from outside the system is adjusted. Even if the concentration fluctuates, it is possible to reliably reduce the amount of phosphorus flowing out of the system.
Moreover, according to this Embodiment 242, since the amount of sewage flowing into the sedimentation basin 1 is adjusted and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted is given. Furthermore, according to this Embodiment 242, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 242, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  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, but the apparatus is configured to measure the ammoniacal nitrogen concentration. May be. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 243 of the present invention. This embodiment includes a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and detects the amount of phosphorus flowing from outside the system A phosphoric acid phosphorus concentration meter that measures 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 and the amount of sewage flowing into the first sedimentation basin. The device is configured. In FIG. 243, reference numeral 14 denotes an initial settling tank inflow pump provided in the pipe a in order to adjust the flow rate of sewage flowing into the initial settling tank 1.

In addition, 141 is a phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the inflow water flowing into the biological reaction tank 2, and 128 is the amount of sewage flowing into the anaerobic tank 4 according to the measurement value of the phosphoric acid phosphorus concentration meter 141. A controller that outputs a signal to be a predetermined value to the arithmetic unit 200, and 200 sets the amount of sewage flowing into the first settling basin 1 to a predetermined value according to the output value of the controller 21 and the output value of the controller 128. It is a computing unit that first outputs a signal to the settling tank inflow pump 14. The phosphoric acid phosphorus concentration meter 141 is provided in the pipe b. The regulator 128 is connected to the phosphoric acid phosphorus concentration meter 141 via the signal line 141a. The arithmetic unit 200 is connected to the signal line 21a via the signal line 21b, the regulator 128 via the signal line 128a, and the initial sedimentation tank inflow pump 14 via the signal line 200a.
The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 21a, and is also 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 the phosphoric acid phosphorus concentration meter 141, and the measured value is transmitted to the controller 128 via the signal line 141a. The regulator 128 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 (15.1) according to the measured value of the phosphoric acid phosphorus concentration. The output of the adjuster 128 is transmitted to the arithmetic unit 200 via the signal line 128a.

  The computing unit 200 sets the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 21 and the output value of the regulator 128, for example, according to an equation similar to the equation (24.1). Output a signal. The output of the arithmetic unit 200 is transmitted to the inflow pump 15 through 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 first sedimentation basin 1 will increase and the amount of sewage flowing into the anoxic tank 5 will increase, and the Increases the supply of organic matter. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. On the other hand, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the first sedimentation basin 1 is decreased and the amount of sewage flowing into the anoxic tank 5 is decreased. Reduces the supply of organic matter. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
In addition, depending on how large the measured value of the phosphoric acid phosphorus concentration is, the amount of sewage flowing into the settling basin 1 first increases or decreases, so that the amount of sewage flowing into the anaerobic tank 4 increases or decreases, and the organic matter into the anaerobic tank 4 increases. Supply amount 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 243, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired. Furthermore, according to this Embodiment 243, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, according to the measured value, the inflow sewage quantity to the sedimentation basin 1 is adjusted to the anaerobic tank 4 first. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Moreover, according to this Embodiment 243, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 243, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 243, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 244.
FIG. 244 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 244 of the present invention. This embodiment includes a redox potentiometer that measures the redox potential of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, and means for detecting the amount of phosphorus flowing from outside the system. A phosphoric acid phosphorus concentration meter that measures the concentration of phosphoric acid phosphorus in the sewage flowing into the biological reactor as It is a thing. In FIG. 244, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 in accordance with the output value of the adjuster 22 and the output value of the adjuster 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 22a through the signal line 22b, the regulator 128 through the signal line 128a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other constituent elements are the same as or equivalent to those shown in FIGS. 4 and 243 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the fourth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (2.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 244, the oxidation-reduction potential of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and depending on the difference from the predetermined target value, By adjusting the amount of sewage flowing into the bypass, the amount of organic matter supplied to the oxygen-free tank 5 is adjusted, so that the amount of nitrogen flowing out of the system is reliably reduced even when the flow rate or concentration of sewage flowing from outside the system changes. The effect that can be obtained. Furthermore, according to this Embodiment 244, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted initially according to the measured value, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 244, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 244, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 244, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 245.
FIG. 245 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 245 of the present invention. This embodiment includes a device for calculating the difference between the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent water as a means for detecting the amount of denitrification from outside the system. As a means to detect the amount of inflowing phosphorus, it is 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. The apparatus is configured to adjust the amount of water. In FIG. 245, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 23 and the output value of the regulator 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 23a through the signal line 23b, the regulator 128 through the signal line 128a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the sixth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (3.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 245, the nitrate nitrogen concentration of sewage and the nitrate nitrogen concentration of effluent in the mixed solution in the oxygen-free tank 5 are measured, and the calculated value of the difference between them is calculated. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference from the predetermined target value, the flow rate and concentration of sewage flowing from outside the system Even if fluctuates, the effect of reliably reducing the amount of nitrogen flowing out of the system can be obtained. Furthermore, according to this Embodiment 245, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage amount which flows into the sedimentation tank 1 first is adjusted according to the measured value, and it goes to the anaerobic tank 4 Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Moreover, according to this Embodiment 245, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time 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 affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 245, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic substances supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 245, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 246.
FIG. 246 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 246 of the present invention. This embodiment is equipped with a device for estimating the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the denitrification amount, Equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration meter of the sewage water flowing into the reaction tank 2, and configured to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank It is a thing. In FIG. 246, each component is the same as or equivalent to that indicated by the same reference numeral in FIG. 8 and FIG. 243, and detailed description thereof is omitted.

Next, the operation will be described.
Similarly to the case of the eighth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (1.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 246, the nitrate nitrogen concentration of the sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is used using the accumulated nitrate nitrogen concentration data. The anaerobic tank 5 is estimated by estimating the nitrate nitrogen concentration of the sewage in the mixed liquid and adjusting the amount of sewage flowing into the anoxic tank 5 according to the difference between the estimated value and a predetermined target value. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 246, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted initially according to the measured value, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 246, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this embodiment 246, the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling basin 1 first, so that the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 246, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 247.
FIG. 247 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 247 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the sewage flowing into the bioreactor, and configured the device to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank Is. In FIG. 247, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 24 and the output value of the regulator 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 24a through the signal line 24b, the regulator 128 through the signal line 128a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those indicated by the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the tenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (4.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 247, the nitrate nitrogen concentration of the discharged water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the difference from the predetermined target value. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this Embodiment 247, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage amount to the sedimentation tank 1 is adjusted to the anaerobic tank 4 according to the measured value first. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 247, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage bypassed into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 247, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 247, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

  In this embodiment, the amount of nitrogen flowing out of the system is detected by measuring the nitrate nitrogen concentration of the effluent water, but the apparatus may be configured to measure the total nitrogen concentration. In the present embodiment, the amount of phosphorus flowing from outside the system is detected by measuring the phosphoric acid phosphorus concentration of 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 block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 248 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of the discharged water 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 from outside the system. Equipped with a phosphoric acid phosphorus concentration meter that measures the phosphoric acid phosphorus concentration of the sewage flowing into the bioreactor, and configured the device to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation tank Is. In FIG. 248, reference numeral 200 denotes an operation for outputting to the first settling tank inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling tank 1 in accordance with the output value of the adjuster 25 and the output value of the adjuster 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 25a through the signal line 25b, the regulator 128 through the signal line 128a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 12 and 243 with the same reference numerals, and detailed description thereof will be omitted.

Next, the operation will be described.
Similarly to the case of the twelfth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (5.1) is output to the initial sedimentation-anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 248, the concentration of nitrate nitrogen in the effluent water is measured, and the amount of sewage flowing into the anoxic tank 5 is adjusted according to the measured value, thereby reducing the oxygen-free tank 5. Since the amount of organic matter supplied to the system is adjusted, 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. Furthermore, according to this Embodiment 248, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and according to the measured value, the inflow sewage quantity to the sedimentation tank 1 is adjusted first, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 248, the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 248, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation tank 1 first, it influences the amount of organic matter supplied to the anaerobic tank 5. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 248, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 249.
FIG. 249 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 249 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the bioreactor as a means to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. Is configured. In FIG. 249, reference numeral 200 denotes an operation for outputting a signal to the first settling tank inflow pump 14 with a predetermined value for the amount of sewage flowing into the first settling tank 1 according to the output value of the adjuster 26 and the output value of the adjuster 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 26a through the signal line 26b, the regulator 128 through the signal line 128a, and the initial sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown with the same reference numerals in FIGS.

Next, the operation will be described.
Similarly to the case of the fourteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (6.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) is first output to the settling tank inflow pump 14.

As described above, according to this embodiment 249, the total nitrogen concentration of the sewage flowing into the biological reaction tank 2 is measured, and the oxygen free oxygen is determined according to the difference from the target value of the predetermined total nitrogen concentration of the discharged water. Since the amount of organic matter supplied to the anoxic tank 5 is adjusted by adjusting the amount of sewage flowing into the tank 5, the amount of nitrogen flowing out of the system even when the flow rate or concentration of sewage flowing from outside the system changes The effect that can be reliably reduced is obtained. Furthermore, according to this Embodiment 249, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted initially according to the measured value, and it goes to the anaerobic tank 4. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 249, the amount of sewage flowing into the settling basin 1 is adjusted at the same time, and the amount of sewage flowing into the anaerobic tank 5 is adjusted, so that the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Furthermore, according to this Embodiment 249, since the inflow sewage amount to the anaerobic tank 4 is adjusted by adjusting the inflow sewage amount to the sedimentation basin 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 249, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 250. FIG.
FIG. 250 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 250 of the present invention. This embodiment includes a total nitrogen concentration meter that measures 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 phosphorus in the sewage flowing into the bioreactor as a means to adjust the amount of sewage flowing into the anoxic tank and the amount of sewage flowing into the first sedimentation basin. Is configured. In FIG. 250, reference numeral 200 denotes an operation for outputting to the first settling basin inflow pump 14 a signal having a predetermined value for the amount of sewage flowing into the first settling basin 1 according to the output value of the regulator 27 and the output value of the regulator 128. It is a vessel. The arithmetic unit 200 is connected to the signal line 27a through the signal line 27b, the regulator 128 through the signal line 128a, and the first sedimentation tank inflow pump 14 through the signal line 200a. The other components are the same as or equivalent to those shown in FIGS. 16 and 243 with the same reference numerals, and detailed description thereof is omitted.

Next, the operation will be described.
As in the case of the sixteenth embodiment, the amount of sewage flowing into the anoxic tank 5 is adjusted. That is, a signal having a value obtained according to the equation (7.1) is output to the initial sedimentation / anoxic tank bypass inflow pump 11.
Further, similarly to the case of the embodiment 243, the amount of sewage flowing into the first settling basin 1 is adjusted. That is, a signal having a value obtained according to an equation similar to the equation (24.1) 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 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. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by this, even if the flow rate or concentration of sewage flowing from outside the system fluctuates, the amount of nitrogen flowing out from the system can be reliably reduced. Furthermore, according to this embodiment 250, the phosphoric acid phosphorus density | concentration of the sewage which flows in into the biological reaction tank 2 is measured, and the inflow sewage quantity to the sedimentation tank 1 is adjusted according to the measured value to the anaerobic tank 4 first. Since the amount of organic matter supplied to the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing in, and the amount of phosphorus discharged is adjusted, the amount of phosphorus that flows out of the system even when the flow rate or concentration of sewage flowing from outside the system fluctuates. The effect of reliably reducing the amount of is obtained.
Further, according to this embodiment 250, since the amount of sewage flowing into the sedimentation basin 1 is adjusted at the same time and the amount of sewage flowing into the anaerobic tank 5 is adjusted, the amount of organic matter supplied to the anaerobic tank 4 is affected. The effect which can adjust the amount of sewage by which the bypass inflow to the anoxic tank 5 can be adjusted, without giving. Further, according to this embodiment 250, since the amount of sewage flowing into the anaerobic tank 4 is adjusted by adjusting the amount of sewage flowing into the settling tank 1 first, the amount of organic matter supplied to the anaerobic tank 5 is affected. The effect which can adjust the inflow sewage amount to the anaerobic tank 4 without giving is obtained.
Further, according to this embodiment 250, since a part of the sewage flowing out from the first sedimentation basin 1 is bypassed into the anoxic tank 5, there are few SS components in the bypass flow to the anoxic tank 5, The effect which can reduce the load of the sedimentation-oxygen tank bypass inflow pump 11 is acquired.

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

Embodiment 251. FIG.
FIG. 251 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 251 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Further, in this embodiment, the apparatus is configured so as to correct the output value to the initial sedimentation-anoxic tank bypass inflow pump in accordance with the changing tendency of the amount of sewage flowing into the biological reaction tank. In FIG. 251, 43 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5, 31 is a setter that sets a target value of nitrate nitrogen concentration, and 21 is nitrate. A signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value in accordance with the difference between the measured value of the nitrogen concentration meter 43 and the target value set in the setting device 31 is a primary sink-anoxic tank bypass inflow pump. 11 is a flow meter (correction means) that measures the amount of sewage flowing into the biological reaction tank 2, and 111 is the initial precipitation-oxygen-free according to the changing tendency of the amount of sewage flowing into the biological reaction tank 2. It is a corrector (correction means) for correcting the output value to the tank bypass inflow pump 11. 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 regulator 21 is connected to the nitrate nitrogen concentration meter 43 via the signal line 43a and to the setting device 31 via the signal line 31a. The corrector 111 is connected to the flow meter 101 via the signal line 101a, the regulator 21 via the signal line 21a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 111a. The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the regulator 21 is transmitted to the corrector 111 via the signal line 21a.
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.

The corrector 111 uses the correction value obtained according to the following formula (25.1), for example, according to the change tendency of the amount of sewage flowing into the biological reaction tank 2, and calculates the amount of sewage flowing into the anoxic tank 5. For example, a signal corrected so as to have a value obtained according to the equation (25.2) is output.
_{H0 = H 0 + K hosei1 (} Q in -Q in-1) (25.1)
here,
H0: the correction value H _0: Constant _K hosei1: constant Q _in: inflow volume of sewage to the current bioreactor 2 Q _in-1: 1 step inflow sewage quantity _Q ano_H = Q _ano × prior to the bioreactor 2 H0 (25.2)
here,
Q _{ano_H} : Bypass inflow sewage amount to the anoxic tank 5 after correction Q _ano : Bypass inflow sewage amount to the anaerobic tank 5 before correction The output of the corrector 111 is an initial sedimentation-anoxia tank through the signal line 111 a It is transmitted to the bypass inflow pump 11.

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 increases and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 is reduced, and the amount of organic matter supplied to the anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Further, if the amount of sewage flowing into the biological reaction tank 2 increases, the amount of sewage flowing into the anoxic tank 5 increases and the amount of organic matter supplied to the anoxic tank 5 increases. . Conversely, if the amount of sewage flowing into the biological reaction tank 2 decreases, the amount of sewage flowing into the anoxic tank 5 decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. To do.

As described above, according to this embodiment 251, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to the difference from the predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired.
Further, according to this embodiment 251, the amount of sewage flowing into the biological reaction tank 2 is measured, and the initial settling-anoxic tank bypass inflow pump 11 is changed according to the changing tendency of the amount of sewage flowing into the biological reaction tank 2. The amount of organic matter supplied to the anaerobic tank 5 is adjusted by correcting the output value of the water and adjusting the amount of sewage flowing into the anaerobic tank 5 so that the organic matter is removed when the flow rate of sewage flowing from outside the system fluctuates. An effect that can be supplied to the anoxic tank 5 quickly and accurately is obtained.

In the present embodiment, the correction value is obtained in accordance with the change tendency of the amount of sewage flowing into the biological reaction tank 2, but the change tendency of the oxidation-reduction potential of the mixed liquid in the anaerobic tank 4 and the change of the dissolved oxygen value. When a correction value is obtained according to plant data such as a tendency, a change tendency of an MLSS value, a change tendency of a redox potential of a mixed solution in the anaerobic tank 5, a change tendency of a dissolved oxygen value, a change tendency of an MLSS value Even when the correction value is obtained according to the plant data such as
In the present embodiment, the output value to the initial settling-anoxic tank bypass inflow pump 11 is corrected. However, the inflow pump, the inflow-anoxic tank bypass inflow pump described in the other embodiments described above, The same effect can be obtained even when the output value to the settling tank inflow pump and the inflow-anaerobic tank bypass inflow pump is corrected.

Embodiment 252. FIG.
FIG. 252 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 252 of the present invention. This embodiment is equipped with a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank as a means for detecting the amount of denitrification. The device is configured to adjust. Further, in this embodiment, the apparatus is configured to correct the output value to the initial sedimentation-anoxic tank bypass inflow pump in accordance with the changing tendency of the total nitrogen amount flowing into the biological reaction tank. In FIG. 252, 43 is a nitrate nitrogen concentration meter that measures the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5, 31 is a setter that sets a target value of nitrate nitrogen concentration, and 21 is nitrate. A signal that sets the amount of sewage flowing into the anaerobic tank 5 to a predetermined value in accordance with the difference between the measured value of the nitrogen concentration meter 43 and the target value set in the setting device 31 is a primary sink-anoxic tank bypass inflow pump. 11 is a flow meter (correction means) for measuring the amount of sewage flowing into the biological reaction tank 2, and 61 is a total nitrogen concentration meter (for measuring the total nitrogen concentration of sewage flowing into the biological reaction tank 2). (Correction means), 83 is a computing unit (correction means) for calculating the total nitrogen amount flowing into the biological reaction tank 2 per unit time, and 112 is initially settled according to the changing tendency of the total nitrogen amount flowing into the biological reaction tank 2 -Correct the output value to the oxygen-free tank bypass inflow pump 11 It is a righteous (correction means). The nitrate nitrogen concentration meter 43 is provided in the anoxic tank 5, and the flow meter 101 and the total nitrogen concentration meter 61 are provided in the pipe b. The regulator 21 is connected to the nitrate nitrogen concentration meter 43 via the signal line 43a and to the setting device 31 via the signal line 31a. The computing unit 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 corrector 112 is connected to the arithmetic unit 83 via the signal line 83a, the regulator 21 via the signal line 21a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 112a. The other constituent elements are the same as or equivalent to those shown in FIG.

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 regulator 21 via the signal line 43a. The target value set in the setting device 31 is transmitted to the adjuster 21 through the signal line 31a. The regulator 21 sets the amount of sewage flowing into the anoxic tank 5 according to, for example, the equation (1.1) according to the difference between the measured value of the nitrate nitrogen concentration and a predetermined target value. Output a signal. The output of the adjuster 21 is transmitted to the corrector 112 via the signal line 21a.
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 sewage flowing into the biological reaction tank 2 is measured by the total nitrogen concentration meter 61, and the measured value is transmitted to the calculator 83 via the signal line 61a. The calculator 83 calculates the total amount of nitrogen flowing into the biological reaction tank 2 per unit time, for example, according to the following equation (26.1).
N _in = Q _in × C _{TN — in} (26.1)
here,
N _in : Total nitrogen amount flowing into the biological reaction tank 2 per unit time Q _in : Flow rate of sewage flowing into the biological reaction tank 2 C _{TN_in} : Total nitrogen concentration of sewage flowing into the biological reaction tank 2 Output of the calculator 83 Is transmitted to the corrector 112 via the signal line 83a.

The corrector 83 uses the correction value obtained according to the following equation (26.2), for example, according to the change tendency of the total nitrogen amount flowing into the biological reaction tank 2, and the amount of sewage flowing into the anoxic tank 5 by bypass. For example, a signal corrected so as to be a value obtained according to the equation (26.3) is output.
_{H0 = H 0 + K hosei2 (} N in -N in-1) (26.2)
here,
H0: the correction value H _0: Constant _K hosei2: constant N _in: total nitrogen flowing into the current bioreactor 2 N _in-1: 1 total nitrogen flowing into the bioreactor 2 in the previous step _Q ano_H = Q _ano xH0 (26.3)
here,
Q _{ano_H} : The amount of sewage flowing into the anoxic tank 5 after correction Q _ano : The amount of sewage flowing into the anoxic tank 5 before correction It is transmitted to the bypass inflow pump 11.

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 increases and the amount of organic matter supplied to the anoxic tank 5 increases. As a result, the denitrification reaction becomes active and the amount of nitrogen removal increases. Conversely, if the measured value of nitrate nitrogen concentration is smaller than the target value, the amount of sewage flowing into the anoxic tank 5 is reduced, and the amount of organic matter supplied to the anoxic tank 5 is reduced. As a result, the denitrification reaction becomes inactive and the amount of nitrogen removed decreases.
Moreover, if the total nitrogen amount flowing into the biological reaction tank 2 increases, the amount of sewage flowing into the anoxic tank 5 increases and the amount of organic matter supplied to the anoxic tank 5 increases. To do. Conversely, if the total amount of nitrogen flowing into the biological reaction tank 2 decreases, the amount of sewage that flows into the anoxic tank 5 decreases, and the amount of organic matter supplied to the anoxic tank 5 decreases. Change.

As described above, according to this embodiment 252, the nitrate nitrogen concentration of sewage in the mixed solution in the oxygen-free tank 5 is measured, and the oxygen-free tank 5 is transferred according to a difference from a predetermined target value. The amount of organic matter supplied to the oxygen-free tank 5 is adjusted by adjusting the amount of sewage flowing into the bypass, so that 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 ensured. The effect which can be reduced is acquired.
Further, according to this embodiment 252, the flow rate of sewage flowing into the biological reaction tank 2 and the total nitrogen concentration are measured, and initial precipitation-oxygen-free according to the changing tendency of the total nitrogen amount flowing into the biological reaction tank 2. Since the amount of organic matter supplied to the anaerobic tank 5 is adjusted by correcting the output value to the tank bypass inflow pump 11 and adjusting the amount of sewage flowing into the anoxic tank 5, the flow rate of sewage flowing from outside the system When the concentration fluctuates, an effect can be obtained in which the organic matter can be quickly and accurately supplied to the oxygen-free tank 5.

In the present embodiment, the flow meter 101 is arranged on the upstream side and the total nitrogen concentration meter 61 is arranged on the downstream side, but the same effect can be obtained even when 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 even when it is installed in the pipe d.
Moreover, in this Embodiment, although the total nitrogen concentration meter 61 was installed in the piping b, even when it installs in the piping a, the same effect is acquired.
In the present embodiment, the output value to the initial settling-anoxic tank bypass inflow pump 11 is corrected. However, the inflow pump, the inflow-anoxic tank bypass inflow pump described in the other embodiments described above, The same effect can be obtained even when the output value to the settling tank inflow pump and the inflow-anaerobic tank bypass inflow pump is corrected.

Embodiment 253.
In one of the embodiments 1 to 252 described above, in order to adjust the amount of sewage flowing into the anaerobic tank 5, the anaerobic tank 4, and the first sedimentation tank 1, it flows into the biological reaction tank 2. The case where the total nitrogen concentration and ammonia nitrogen concentration of sewage to be used is used or the case where the phosphoric acid phosphorus concentration and total phosphorus concentration of sewage flowing into the biological reaction tank 2 are used has been explained, but it flows into the biological reaction tank 2 per unit time. Even when the flow rate of sewage flowing into the anaerobic tank 5, the anaerobic tank 4 or the first settling tank 1 is adjusted using the amount of nitrogen or phosphorus to be produced, the same effect can be obtained.

  FIG. 253 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 253 of the present invention. FIG. 253 is an example in which the amount of sewage flowing into the anaerobic 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. The modification of the form 14 is shown. In FIG. 253, 101 is a flow meter (inflowing nitrogen amount detecting means) that measures the amount of sewage flowing into the biological reaction tank 2, and 61 is a total nitrogen concentration meter that measures the total nitrogen concentration of sewage flowing into the biological reaction tank 2 ( Inflow nitrogen amount detection means), 83 is a computing unit (inflow nitrogen amount detection means) for calculating the total nitrogen amount flowing into the biological reaction tank 2 per unit time, 231 is the total nitrogen amount flowing out of the system per unit time A setter 221 for setting the target value of the gas, a signal for setting the amount of sewage flowing into the anoxic tank 5 to a predetermined value in accordance with the difference between the calculated value of the calculator 83 and the target value set in the setter 231 Is a regulator (anaerobic tank inflow water amount adjustment signal output means) that outputs to the initial settling-anoxic tank bypass inflow pump 11. The flow meter 101 and the total nitrogen concentration meter 61 are provided in the pipe b. The computing unit 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 regulator 221 is connected to the computing unit 83 through the signal line 83a, the setting unit 231 through the signal line 231a, and the initial sedimentation / anoxic tank bypass inflow pump 11 through the signal line 221a. The other components are the same as or equivalent to those shown in FIG. 14 with the same reference numerals, and detailed description thereof is omitted.

Embodiment 254.
In one of the embodiments 1 to 252 described above, in order to adjust the amount of sewage flowing into the anaerobic tank 5, the anaerobic tank 4, and the first sedimentation tank 1, the nitrate nitrogen of the effluent water The case of using the concentration and the total nitrogen concentration or the case of using the phosphoric acid phosphorus concentration and the total phosphorus concentration of the discharged water has been described. Even when the amount of sewage flowing into the anaerobic tank 4 or the first settling basin 1 is adjusted, the same effect can be obtained.

  FIG. 254 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 254 of the present invention. FIG. 254 shows an embodiment in which the amount of sewage flowing into the anaerobic tank 5, the anaerobic tank 4 and the first sedimentation tank 1 is adjusted using the amount of nitrogen or phosphorus flowing out of the system per unit time. 10 modification examples are shown. In FIG. 254, 106 is a flow meter (flowing nitrogen amount detection means) for measuring the flow rate of effluent water, 46 is a nitrate nitrogen concentration meter (flowing nitrogen amount detection means) for measuring the nitrate nitrogen concentration of effluent water, and 85 is An arithmetic unit for calculating the amount of nitrate nitrogen flowing out of the system per unit time (outflow nitrogen amount detecting means), 232 is a setting unit for setting a target value for the amount of nitrate nitrogen, 222 is an arithmetic value of the arithmetic unit 85 A regulator that outputs a signal to the initial settling-anoxic tank bypass inflow pump 11 that sets the bypass inflow sewage amount to the anaerobic tank 5 to a predetermined value according to the difference from the target value set in the setter 232 Oxygen tank inflow water amount adjustment signal output means). The flow meter 106 and the nitrate nitrogen concentration meter 46 are provided in the pipe d. The calculator 85 is connected to the flow meter 106 via the signal line 106a and to the nitrate nitrogen concentration meter 46 via the signal line 46a. The regulator 222 is connected to the computing unit 85 through the signal line 85a, the setting unit 232 through the signal line 232a, and the initial sedimentation-anoxic tank bypass inflow pump 11 through the signal line 222a. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and detailed description thereof is omitted.

Embodiment 255. FIG.
In one of the above-described Embodiments 1 to 254, the amount of nitrogen or phosphorus flowing out of the system is set to the nitrate nitrogen concentration, total nitrogen concentration, or phosphorus of the discharge water. Although the case where it detects by measuring acidic phosphorus concentration or total phosphorus concentration was demonstrated, even if it is the case where it detects by measuring the nitrogen concentration or phosphorus concentration of the sewage in the liquid mixture of the aerobic tank 6 terminal, it is the same The effect is obtained.

  FIG. 255 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 255 of the present invention. FIG. 255 shows an embodiment in which the amount of nitrogen flowing out of the system and the amount of phosphorus are detected by measuring the nitrogen concentration or phosphorus concentration of sewage in the mixed solution at the end of the aerobic tank 6. 10 modification examples are shown. In FIG. 255, 44 is a nitrate nitrogen concentration meter (outflow nitrogen amount detection means, nitrogen concentration meter) for measuring the nitrate nitrogen concentration of sewage in the mixed solution 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 regulator 24 is connected to the nitrate nitrogen concentration meter 44 via the signal line 44a, the setting device 34 via the signal line 34a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 24a. Yes. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and detailed description thereof is omitted.

Embodiment 256. FIG.
In one of the above-described Embodiments 1 to 254, the amount of nitrogen or phosphorus flowing out of the system is set to the nitrate nitrogen concentration, total nitrogen concentration, or phosphorus of the discharge water. Although the case where it detects by measuring acidic phosphorus concentration and total phosphorus concentration was demonstrated, even if it is the case where it detects by measuring the nitrogen concentration or phosphorus concentration of the sewage in the liquid mixture which flows out from the biological reaction tank 2 Similar effects can be obtained.

  FIG. 256 is a block diagram showing a control apparatus for 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 from the biological water treatment apparatus is detected by measuring the nitrogen concentration or phosphorus concentration in the mixed solution flowing out from the biological reaction tank 2. The modification of the form 10 is shown. In FIG. 256, 45 is a nitrate nitrogen concentration meter (flowing nitrogen amount detection means, nitrogen concentration meter) for measuring the nitrate nitrogen concentration of sewage in the mixed solution flowing out from the biological reaction tank 2. The nitrate nitrogen concentration meter 45 is provided in the pipe c. The regulator 24 is connected to the nitrate nitrogen concentration meter 45 via the signal line 45a, the setting device 34 via the signal line 34a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 24a. Yes. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and detailed description thereof is omitted.

Embodiment 257.
In one of the above-described Embodiments 1 to 254, the amount of nitrogen or phosphorus flowing out of the system is set to the nitrate nitrogen concentration, total nitrogen concentration, or phosphorus of the discharge water. Although the case where it detects by measuring acidic phosphorus concentration and total phosphorus concentration was demonstrated, even if it is a case where it detects by measuring nitrogen concentration or phosphorus concentration of the supernatant water in the final sedimentation basin 3, the same effect is obtained. can get.

  FIG. 257 is a block diagram showing a control device for a biological water treatment apparatus according to Embodiment 257 of the present invention. FIG. 257 shows a modification of the embodiment 10 as 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. An example is shown. In FIG. 257, 47 is a nitrate nitrogen concentration meter (outflow nitrogen amount detection means, nitrogen concentration meter) for measuring the nitrate nitrogen concentration of the supernatant water in the final sedimentation basin 5. A nitrate nitrogen concentration meter 47 is provided in the final sedimentation basin 3. The regulator 24 is connected to the nitrate nitrogen concentration meter 47 via the signal line 47a, the setting device 34 via the signal line 34a, and the initial sedimentation-anoxic tank bypass inflow pump 11 via the signal line 24a. Yes. The other components are the same as or equivalent to those shown in FIG. 10 with the same reference numerals, and detailed description thereof is omitted.

Embodiment 258.
In one of the above-described Embodiments 1 to 254, the amount of nitrogen or phosphorus that flows from outside the system is used as the total nitrogen concentration of sewage flowing into the biological reaction tank 2 or ammonia nitrogen. The case of detection by measuring the concentration or phosphoric acid concentration or total phosphorus concentration of sewage flowing into the biological reaction tank 2 has been described. Even if it is a case where it detects by this, the same effect is acquired.

  FIG. 258 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 258 of the present invention. FIG. 258 shows a modification of the embodiment 24 as an example in which the amount of nitrogen or phosphorus flowing from outside the system is detected by measuring the nitrogen concentration or phosphorus concentration of sewage flowing into the sedimentation tank 1 first. An example is shown. In FIG. 258, reference numeral 149 denotes a phosphoric acid phosphorus concentration meter (inflowing phosphorus amount detecting means, phosphorus concentration meter) that measures the phosphoric acid phosphorus concentration of the sewage that first flows into the settling basin 1. A phosphoric acid phosphorus concentration meter 149 is provided in the pipe a. The regulator 127 is connected to the phosphoric acid phosphorus concentration meter 149 via the signal line 149a, 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 shown in FIG. 24 with the same reference numerals, and detailed description thereof will be omitted.

Embodiment 259.
In one of the above-described Embodiments 1 to 254, the amount of nitrogen or phosphorus that flows from outside the system is used as the total nitrogen concentration of sewage flowing into the biological reaction tank 2 or ammonia nitrogen. The case of detecting by measuring the concentration or the phosphoric acid phosphorus concentration or total phosphorus concentration of sewage flowing into the biological reaction tank 2 has been explained. Even if it is a case where it detects by doing, the same effect is acquired.

  FIG. 259 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 259 of the present invention. FIG. 259 shows the embodiment 24 as an example of detecting the amount of nitrogen or phosphorus flowing from outside the system by measuring the nitrogen concentration or phosphorus concentration of sewage in the mixed solution at the tip of the anaerobic tank 4. The modification of is shown. In FIG. 259, reference numeral 147 denotes a phosphoric acid phosphorus concentration meter (inflowing phosphorus amount detecting means, phosphorus concentration meter) for measuring the phosphoric acid phosphorus concentration of sewage in the mixed liquid 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. The regulator 127 is connected to the phosphoric acid phosphorus concentration meter 147 via the signal line 147a, 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 shown in FIG. 24 with the same reference numerals, and detailed description thereof will be omitted.

Embodiment 260. FIG.
In one of the above-described Embodiments 1 to 254, the amount of nitrogen or phosphorus that flows from outside the system is used as the total nitrogen concentration of sewage flowing into the biological reaction tank 2 or ammonia nitrogen. The case of detecting by measuring the concentration or phosphoric acid phosphorus concentration or total phosphorus concentration of sewage flowing into the biological reaction tank 2 has been explained. Even if it is a case where it detects, the same effect is acquired.

  FIG. 260 is a block diagram showing a control apparatus for 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 first measuring the nitrogen concentration or phosphorus concentration of sewage in the settling basin 1. 24 modification examples are shown. In FIG. 260, reference numeral 148 denotes a phosphoric acid phosphorus concentration meter (inflowing phosphorus amount detecting means, phosphorus concentration meter) for measuring the phosphoric acid phosphorus concentration of the sewage in the first sedimentation tank 1. The phosphoric acid phosphorus concentration meter 148 is first provided in the settling basin 1. The regulator 127 is connected to the phosphoric acid phosphorus concentration meter 148 through the signal line 148a, the setting device 137 through the signal line 137a, and the inflow-anaerobic tank bypass inflow pump 13 through the signal line 127a. The other components are the same as or equivalent to those shown in FIG. 24 with the same reference numerals, and detailed description thereof will be omitted.

Embodiment 261.
In one embodiment of the first to 260th embodiments described above, a case where the amount of sewage flowing into the anoxic tank 5 is adjusted using the initial sedimentation-anoxic tank bypass inflow pump 11 will be described. However, the same effect can be obtained even when adjustment is performed using a valve.

  FIG. 261 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 261 of the present invention. FIG. 261 shows a modification of the second embodiment as an example in which the amount of sewage flowing into the anoxic tank 5 is adjusted using a valve. In FIG. 261, reference numeral 16 denotes an initial sedimentation-anoxic tank bypass inflow control valve (an oxygen-free 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 detailed description thereof is omitted.

Embodiment 262. FIG.
In one embodiment of the first to 260th embodiments described above, the case where the amount of sewage flowing into the anoxic tank 5 is adjusted using the inflow-oxygen-free tank bypass inflow pump 12 has been described. However, the same effect can be obtained even when the adjustment is performed using a valve.

  FIG. 262 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 262 of the present invention. FIG. 262 shows a modification of the first embodiment as an example in which the amount of sewage flowing into the anoxic tank 5 is adjusted using a valve. In FIG. 262, reference numeral 17 denotes an inflow-anoxic tank bypass inflow control valve (an 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 detailed description thereof is omitted.

Embodiment 263.
In one embodiment of the first to 260th embodiments described above, 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. The same effect can be obtained even when adjusting using a valve.

  FIG. 263 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 263 of the present invention. FIG. 263 shows a modified example of the seventeenth embodiment as an example in which the amount of sewage flowing into the anaerobic tank 4 is adjusted using a valve. In FIG. 263, reference numeral 18 denotes an inflow-anaerobic tank bypass inflow control valve (anaerobic tank inflow water amount adjusting means) provided in the pipe k in order to adjust the flow rate of sewage flowing into the anaerobic tank 4 by bypass. Since the other components are the same as or equivalent to those shown in FIG. 17 with the same reference numerals, detailed description thereof is omitted.

Embodiment 264. FIG.
In one embodiment of the first to 260th embodiments described above, the case where the amount of sewage flowing into the first settling basin 1 is adjusted using the first settling basin inflow pump 14 has been described. Even if it is used and adjusted, the same effect is acquired.

  FIG. 264 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 264 of the present invention. FIG. 264 shows a modification of the embodiment 35 as an example of adjusting the amount of sewage flowing into the first settling basin 1 using a valve. In FIG. 264, 17 is an inflow-anoxic tank bypass inflow control valve provided in the pipe j for adjusting the flow rate of sewage that flows into the anoxic tank 5, and 19 is the flow rate of sewage that first flows into the settling tank 1. Is a first settling tank inflow control valve (first settling tank inflow water amount adjusting means) provided in the pipe a. The other components are the same as or equivalent to those shown in FIG. 35 with the same reference numerals, and detailed description thereof is omitted.

Embodiment 265.
In one embodiment of the first to 260th embodiments described above, the case where the inflow sewage amount to the biological water treatment apparatus is adjusted using the inflow pump 15 has been described. The same effect can be obtained even when adjusting.

  FIG. 265 is a block diagram showing a control apparatus for a biological water treatment apparatus according to Embodiment 265 of the present invention. FIG. 265 shows a modification of the embodiment 107 as an example in which the amount of sewage flowing into the biological water treatment apparatus is adjusted using a valve. In FIG. 265, 17 is an inflow-anoxic tank bypass inflow control valve provided in the pipe j for adjusting the flow rate of sewage flowing into the anoxic tank 5, and 20 is sewage flowing into the biological water treatment apparatus. It is an inflow control valve (first sedimentation basin inflow water amount adjusting means) for adjusting the flow rate of. The other constituent elements are the same as or equivalent to those shown in FIG. 107 with the same reference numerals, and detailed description thereof will be omitted.

In the above-described first to 255th embodiments, the case where a nitrate nitrogen concentration meter or a redox potential meter is used as a means for detecting the denitrification amount has been described. The present invention is not limited to these as long as the amount of nitrogen 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 means for detecting the amount of nitrogen has been described. However, the present invention is not limited to this as long as it can detect the amount.
In one of the first to 255th embodiments described above, a phosphoric acid phosphorus concentration meter, oxidation-reduction potentiometer, or phosphorus accumulation amount measuring device is used as means for detecting the phosphorus discharge amount. However, the present invention is not limited to this as long as it can detect the phosphorus discharge amount.
Further, in one of the above-described Embodiments 1 to 255, the 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 this as long as it can detect the amount.
In Embodiment 252 described above, a flow meter is provided to measure the flow rate of sewage flowing into the biological reaction tank and the flow rate of effluent water. However, the sewage flowing into the biological water treatment apparatus is measured. When 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, the time-sequential analog type is used, but the same effect can be obtained even if the time-sequential analog type (sample value type) or digital type is used.
Further, in each of the above-described embodiments, the control circuit configuration is shown, but the same effect can be obtained even if this is implemented by programming in a computer.
Moreover, in each embodiment mentioned above, although the control circuit was comprised by the closed loop, you may comprise as a driving assistance system which shows a control target value to an operator.

  DESCRIPTION OF SYMBOLS 1 First sedimentation tank, 2 Biological reaction tank, 3 Final sedimentation tank, 4 Anaerobic tank, 5 Anoxic tank, 6 Aerobic tank, 11 Initial sedimentation-Anoxic tank bypass inflow pump (anoxic tank inflow water amount adjusting means), 12 Inflow-anoxic tank bypass inflow pump (anoxic tank inflow water amount adjusting means), 13 Inflow-anaerobic tank bypass inflow pump (anaerobic tank inflow water amount adjusting means), 14 First sedimentation tank inflow pump (initial sedimentation tank inflow water amount adjusting means) , 15 Inflow pump (first sedimentation basin inflow water volume adjustment means), 16 Initial sedimentation-anoxic tank bypass inflow volume control valve (anoxic tank inflow water volume adjustment means), 17 Inflow-anaerobic tank bypass inflow volume control valve (oxygen free) Tank inflow water amount adjusting means), 18 inflow-anaerobic tank bypass inflow amount moderation valve (anaerobic tank inflow water amount adjusting means), 19 first settling tank inflow control valve (first settling tank inflow water amount adjusting means), 20 inflow adjusting valve (first settling) Inflow water amount adjusting means), 21, 22, 23, 24, 25, 26, 27, 221, 222 Adjuster (oxygen tank inflow water amount adjusting signal output means), 31, 32, 33 Setter (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 redox potential meter (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 calculator (denitrification amount detection means, calculation means), 82 calculator (denitrification amount detection means, estimation means), 83 calculator (Correction means, inflow nitrogen amount detection means), 85 arithmetic (Flowing 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, 125, 126, 127, 128 Controller (anaerobic tank inflow water amount adjustment signal output means), 131, 132, 133, 134 Setter (phosphorus discharge target value setting means), 141 Phosphoric acid phosphorus concentration meter (phosphorus discharge amount) Detection means, calculation means, inflow phosphorus amount detection means, phosphorus concentration meter), 142 phosphoric acid phosphorus concentration meter (phosphorus discharge amount detection means, calculation means, estimation means), 146 phosphoric acid phosphorus 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 (phosphorus discharge amount detection means), 16 Phosphorus content measuring device (phosphorus discharge amount detection means), 171 storage circuit (phosphorus discharge amount detection means, estimation means), 181 calculator (phosphorus discharge amount detection means, calculation means), 182 calculator (phosphorus discharge amount detection means) , Estimation means), 200 calculator (first sedimentation basin inflow water amount adjustment signal output means).

Claims (3)

A biological reaction tank having a first sedimentation basin, an anaerobic tank, an anaerobic tank, and an aerobic tank, and a final sedimentation basin, to-be-treated water flowing from outside the system flows into the first sedimentation basin, The treated water that flows into the pond flows out of the first sedimentation pond, flows into the biological reaction tank, and mixes with the activated sludge stored in the biological reaction tank. The anaerobic tank, the anaerobic tank, and the aerobic tank are moved in this order, while the water to be treated is treated with activated sludge, and the mixed liquid flowing out of the biological reaction tank flows into the final sedimentation basin and the final tank. A biological water treatment device applied to a biological water treatment device that is separated into activated sludge and treated water after activated sludge treatment in a sedimentation basin, and the treated water after activated sludge treatment is discharged out of the system. In the control device,
Inflow phosphorus amount detection means for detecting the phosphorus amount of the treated water flowing from outside the system into the first settling basin,
A signal that sets the amount of treated water that is bypassed from the first settling basin to the anaerobic tank without passing through the anaerobic tank to a predetermined value corresponding to the output value of the inflowing phosphorus amount detecting means. An anaerobic tank inflow water amount adjustment signal output means for outputting
Provided between the first settling basin and the anaerobic tank, an anaerobic tank inflow for adjusting the amount of treated water flowing into the anaerobic tank according to the output value of the anaerobic tank inflow water amount adjustment signal output means Water amount adjusting means,
The oxygen-free tank inflow water amount adjustment signal output means is:
A control apparatus for a biological water treatment apparatus, wherein a signal is output in accordance with a difference between an output value of the inflowing phosphorus amount detection means and a reference value.   2. The biological water treatment apparatus control device according to claim 1, wherein the inflowing phosphorus amount detection means comprises a phosphorus concentration meter for measuring the phosphorus concentration of the water to be treated before the activated sludge treatment. A biological reaction tank having a first sedimentation basin, an anaerobic tank, an anaerobic tank, and an aerobic tank, and a final sedimentation basin, to-be-treated water flowing from outside the system flows into the first sedimentation basin, The treated water that flows into the pond flows out of the first sedimentation pond, flows into the biological reaction tank, and mixes with the activated sludge stored in the biological reaction tank. The anaerobic tank, the anaerobic tank, and the aerobic tank are moved in this order, while the water to be treated is treated with activated sludge, and the mixed liquid flowing out of the biological reaction tank flows into the final sedimentation basin and the final tank. A biological water treatment device applied to a biological water treatment device that is separated into activated sludge and treated water after activated sludge treatment in a sedimentation basin, and the treated water after activated sludge treatment is discharged out of the system. In the control device,
Inflow phosphorus amount detection means for detecting the phosphorus amount of the treated water flowing from outside the system into the first settling basin,
A signal that sets the amount of treated water that is bypassed from the first settling basin to the anaerobic tank without passing through the anaerobic tank to a predetermined value corresponding to the output value of the inflowing phosphorus amount detecting means. An anaerobic tank inflow water amount adjustment signal output means for outputting
Provided between the first settling basin and the anaerobic tank, an anaerobic tank inflow for adjusting the amount of treated water flowing into the anaerobic tank according to the output value of the anaerobic tank inflow water amount adjustment signal output means Water amount adjusting means;
It includes at least one of a change tendency of the inflow sewage amount into the biological reaction tank, a change tendency of the oxidation-reduction potential of the mixed solution in the anaerobic tank, and a change tendency of the inflow sewage amount into the anaerobic tank. A control apparatus for a biological water treatment apparatus, comprising correction means for correcting an output value to the oxygen-free tank inflow water amount adjustment means in accordance with plant data.

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