JPS6344032B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a biological treatment method for wastewater using an ultra-deep aeration method, and more specifically, it relates to a wastewater treatment method in which an ultra-deep aeration tank is provided in a high-rise building to treat wastewater. It is about law.

"Prior Art" Conventionally, a wastewater treatment method using a so-called ultra-deep aeration tank is known, in which an aeration tank having an upward flow pipe and a downward flow pipe is installed at a depth of 50 to 150 m underground. This ultra-deep aeration method requires much less land, and
Although it has advantages such as a high utilization rate of blown air, construction costs are high because the aeration tank must be built deep underground, and sludge settles to the deepest part of the aeration tank, making it difficult to dispose of it. It was difficult to do so.

On the other hand, with urban redevelopment, many high-rise buildings and skyscrapers are being constructed, but as social demands have begun to make effective use of water resources, large-scale buildings have been forced to use water for general use. People are being instructed to use gray water, and as a result, buildings are increasingly being equipped with wastewater treatment equipment to obtain gray water.

``Problem to be Solved by the Invention'' For this reason, conventionally, a large space in the basement floor of a building is actually allocated for this wastewater treatment device.

The present invention has been made in view of the above circumstances, and can be applied to high-rise buildings, has high treatment effects, low treatment costs, easy treatment of settled sludge, low construction costs, and can reduce installation space. The purpose is to provide a wastewater treatment method using buildings.

"Means for Solving the Problem" In order to achieve the above object, the wastewater treatment method according to the present invention provides a high-rise building with a downward flow pipe and an upward flow pipe of approximately the same height as the substantial total height of the high-rise building. A connecting pipe is provided between the lower end of the downward flow pipe and the lower end of the upward flow pipe to form an aeration tank, and a sludge settling chamber is provided in the connected pipe. A funnel-shaped recess is formed at the bottom of the sludge settling chamber, and a pipe for discharging excess sludge is attached to the bottom of the recess to allow extra sludge to settle, while air is forced downward into the wastewater in the downward flow pipe. At the same time, the wastewater in the upper part of the upflow pipe is returned to the upper part of the downflow pipe, thereby circulating the wastewater and treating it in a deep aeration type.

In addition, in wastewater treatment, the structure of the present invention can be utilized by adding known means related to aerated wastewater treatment to improve the treatment effect.

Therefore, the mode of implementation is as follows: (1) Gate valves are provided above the connecting pipes in the lower parts of the upward flow pipe and the downward flow pipe of the deep aeration tank to adjust the flow rate and flow rate of wastewater. (2) Part of the wastewater is extracted from the middle part of the upward flow pipe of the aeration tank, and this extracted wastewater and inflowing raw water are guided to the flotation tank, and harmful substances in the inflowing raw water are removed from the liquid head of the deep aeration tank. (3) A sludge separation tank connected to the sludge settling chamber is provided near the upper end of the upward flow pipe of the aeration tank, and excess sludge settled in the sludge settling chamber is transferred to the deep aeration tank. (4) Excess sludge settled in the sludge settling chamber is led to a dehydrator, and the liquid head pressure in the deep aeration tank is used to power the dehydrator to remove excess sludge. (5) A rotating disc type filter is installed above the upward flow pipe of the aeration tank, and the rotating disc type filter is rotated using the upward flow energy of the wastewater. (6) In the continuous pipe, A contact oxidation filter medium is installed, and a denitrification tank is installed above the upward flow pipe of the aeration tank to continuously treat the BOD components and nitrogen content in the wastewater. By installing a system to enable inspection, cleaning, and loading/unloading of equipment into the connected pipes, it is possible to obtain effective gray water in high-rise buildings.

"Example" Hereinafter, an example that is the basis of the wastewater treatment method according to the present invention will be described in detail with reference to FIGS. 1 and 2.

FIG. 1 is a schematic diagram illustrating the basic configuration of a wastewater treatment apparatus used in carrying out the wastewater treatment method of the present invention, and reference numeral 1 in the figure represents a high-rise building. A shaft 2 having substantially the same height as the total height of the high-rise building 1 is provided inside the high-rise building 1, and a deep aeration tank 3 is provided within the shaft 2. This deep aeration tank 3 is
A downward flow pipe 4 and an upward flow pipe 5 are provided at substantially the same height as the substantial total height of the high-rise building 1, and between the lower end of these downward flow pipe 4 and the lower end of the upward flow pipe 5. Basically, they are formed into a U-shape as shown in FIG. 1 by a connecting pipe 6 that communicates these.In the present invention, in particular, a sludge settling chamber 7 is provided in the connecting pipe 6, Furthermore, a funnel-shaped recess 7a is formed in the bottom of the sludge settling chamber 7, and a pipe 21 for discharging excess sludge is attached to the bottom of the recess 7a. Further, in the present invention, a sludge separation tank 8 is arranged near the upper end of the upward flow pipe 5 of the deep aeration tank 3, and the pipe 21 is connected to this sludge separation tank 8, and the sludge is passed through the pipe 21. It is configured to communicate with the recess 7a of the precipitation chamber 7.

The wastewater treatment of the present invention will be explained below using the flowchart shown in FIG.

Domestic wastewater generated in the building 1 flows down and the inflow wastewater is collected under the road surface GL and is stored in a raw water tank 10 through a pipe 9, passes through a pipe 11, a valve 12, and a valve 13, and then is pumped by a raw water pump 14. The sludge is sent to the upper part of the downward flow pipe 4, and the aeration tank 3 is filled with activated sludge as usual. Since conventional aeration tanks are installed underground, the above-mentioned pumping is not necessary.
A blower 15 is installed above the downward flow pipe 4, from which an air supply pipe 16 is guided into the downward flow pipe 4, and compressed air is injected into the wastewater to impart downward kinetic energy to the wastewater. At the same time, the wastewater comes into contact with the air supplied by the air supply pipe 16 while descending through the downward flow pipe 4, and is purified by the action of activated sludge. Next, the wastewater is sent from the lower end of the downward flow pipe 4 to the continuous pipe 6 that forms the bottom of the U-shape, and enters the upward flow pipe 5 through the sludge settling chamber 7 formed within the continuous pipe 6. ,
The air is returned from the upper part of the upward flow pipe 5 to the upper part of the downward flow pipe 4 via the pipe 18 by the circulation pump 17, and is subjected to aeration treatment again. The treated and purified wastewater is drained from the upper part of the upward flow pipe 5 through a discharge pipe 19, subjected to secondary treatment and tertiary treatment as required, and discharged to the outside. During this time, it is unavoidable that excess activated sludge generated during wastewater treatment, that is, surplus sludge, accumulates at the bottom of the deep aeration tank 3. Conventionally, it has been difficult to treat it deep underground. . In the present invention, the sludge settling chamber 7 is connected to the continuous pipe 6 of the deep aeration tank 3.
A funnel-shaped recess 7a is formed at the bottom of the recess 7a to facilitate the deposition of excess sludge, so that the accumulated excess sludge can be transferred to the deep aeration tank 3 as needed.
Using the high head pressure of the liquid, the sludge is introduced into the sludge separation tank 8 provided at approximately the same position as the top of the upward flow pipe 5 through the valve 20 and the pipe 21, where it is floated under pressure and separated into concentrated sludge. It is separated into separated water and discharged to the outside. Further, a portion of the surplus sludge is returned to the inflow source wastewater via the sludge return pipe 22. The above is the basis of the present invention in which the deep aeration method is carried out within the shaft 2 of the high-rise building 1.

"First Embodiment" Next, the flowchart shown in FIG. 3 shows the first embodiment based on the wastewater treatment method of the present invention. Gate valves 23 and 24 are provided at the bottom of the flow pipe 5, and by adjusting the rotation of the gate valves 23 and 24, the flow rate and velocity of wastewater in the deep aeration tank 3 can be adjusted, and the amount of inflowing wastewater can be adjusted. and can respond to changes in the degree of pollution.

"Second Embodiment" What is shown in FIG. 4 is a flowchart showing the second embodiment based on the wastewater treatment method of the present invention.
In this example, a flotation tank 40 is provided at the same depth as the raw water tank 10, and a part of the wastewater is extracted from the middle part of the upward flow pipe 5 through a pipe 38 and a valve 39. It is mixed with the inflow raw wastewater of the raw water tank 10, and at this time, harmful substances such as SS and oil in the inflow raw wastewater are attached to the bubbles generated when the extracted wastewater returns to normal pressure, and are deposited on the surface of the flotation tank 40. The floated and separated water is sent to the downward flow pipe 4 by a raw water pump 14 for treatment. The floating substances are collected by a scraper 41 and transported to the outside.
According to this flow, the liquid head pressure in the deep aeration tank 3 is used as the power required for flotation separation, and the amount of wastewater extracted from the middle part of the upward flow pipe 5 is adjusted according to the properties of the raw water. Because I'm used to doing it,
Such extraction and installation of flotation tank 40 represent a part of aeration treatment in high-rise buildings.

"Third Embodiment" What is shown in FIG. 5 shows the third embodiment based on the wastewater treatment method of the present invention.
The excess sludge is guided to the dehydrator 25, which uses the high liquid head pressure in the deep aeration tank 3 as power to automatically dewater the excess sludge.
Separated water produced in the dehydrator 25 is stored in a filtration tank 26 and returned to the raw water tank 10 by a filtration pump 27. In addition, a rotating disk type filter medium 28 that rotates using the energy of the upward flow of waste water is provided at the upper part of the upward flow pipe 5, and a known catalytic oxidation method using a rotating disk type filter medium is provided without using external power. Additional treatments can be added to achieve a high level of wastewater treatment. The treated wastewater is drained to the outside through a pipe 29.

"Fourth Embodiment" The flowchart shown in FIG. 6 is the fourth embodiment of the present invention.
shows an embodiment in which two inspection holes 3 are provided in the connecting pipe 6.
0, 31, and a water sampling pipe 32 for measuring dissolved oxygen in wastewater is provided in the connecting pipe 6.
By fully closing the gate valves 23 and 24 and removing the waste water inside the connecting pipe 6 using the raw water pump 14, etc., the inside of the connecting pipe 6 can be inspected and cleaned easily from the lower part of the building. In addition, it becomes possible to carry equipment into the tank, and it is also possible to measure the amount of dissolved oxygen in the wastewater at the deepest part of the deep aeration tank 3. Based on this measurement value, the amount of compressed air blown into the wastewater from the intake pipe 16 can be determined. It becomes possible to maintain the optimum amount of dissolved oxygen by changing the amount of dissolved oxygen.

"Fifth Embodiment" What is shown in FIG. 7 is a flowchart of the fifth embodiment of the wastewater treatment method of the present invention, and in this example,
A known contact oxidation filter medium 33 is provided in the continuous pipe 6, and at the same time the upper part of the upflow pipe 5 is expanded, the upper surface is closed, and an anaerobic atmosphere is created in the denitrification tank 34. A denitrifying filter medium 35 in which denitrifying bacteria live is provided. The wastewater is subjected to aeration treatment in the downward flow pipe 4, and the BOD components in the wastewater are further processed by the contact oxidation filter medium 33 in the continuous pipe 6.
It becomes organic nitrogen and nitrate nitrogen in wastewater. Due to the action of the contact oxidation filter medium 33, the amount of dissolved oxygen in the wastewater becomes almost zero at the upper part of the upflow pipe 5. The wastewater in this state then enters the denitrification tank 34, receives methanol as a nutrient source from the methanol tank 36, and undergoes denitrification treatment by the denitrification bacteria in the denitrification filter medium 35. The wastewater that has undergone BOD removal and denitrification as described above is pipe 37.
The water is discharged to the outside or used as gray water for high-rise buildings 1. In this example, waste water is not circulated from the upper part of the upward flow pipe 5 to the upper part of the downward flow pipe 4, and therefore the circulation pump 17 and the pipe 18 are not installed. The first of the above
Among the constituent parts of the embodiment to the fifth embodiment, those that are the same as those of the basic embodiment are given the same reference numerals, and the explanation thereof is omitted.

"Effects of the Invention" As explained above, the present invention provides high-rise buildings with
A downward flow pipe and an upward flow pipe are provided at approximately the same height as the substantial total height of this high-rise building, and a connection is provided between the lower end of these downward flow pipes and the lower end of the upward flow pipe. A pipe is provided to form an aeration tank, a sludge settling chamber is provided in the connecting pipe, a funnel-shaped recess is formed in the bottom of the sludge settling chamber, and a pipe for discharging excess sludge is attached to the bottom of the recess to remove the excess sludge. At the same time, air is injected downward into the wastewater in the downward flow pipe, and the wastewater in the upper part of the upward flow pipe is returned to the upper part of the downward flow pipe to circulate and flow the wastewater. In this process,
This is an attempt to improve the treatment effect by adding known means related to aerated wastewater treatment.
It has the following excellent effects.

Wastewater can be purified by being circulated through a path inside the aeration tank, which is approximately twice as long as the actual total height of a high-rise building, allowing for advanced treatment. water is available.

Excess sludge generated during treatment is deposited in a funnel-shaped recess formed in the sludge settling chamber at the bottom of the aeration tank, making it easier to deposit excess sludge. Using the high liquid head pressure of the deep aeration tank, excess sludge deposited in the recess is sent to an external sludge separation tank, etc., as needed, through the attached pipe, and solid-liquid separation of wastewater can be performed in this separation tank. Therefore, surplus sludge can be treated easily and inexpensively.

Since a continuous pipe is provided at the bottom of the aeration tank, a contact oxidation filter material can be installed in this continuous pipe as needed, and this filter material can continuously remove BOD components in wastewater, converting wastewater into gray water. The above treated water can be treated.

Furthermore, by providing inspection holes in the continuous pipes, inspection, cleaning, and equipment can be carried in and out through these inspection holes, so maintenance inside the continuous pipes can be easily performed.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of a wastewater treatment device for carrying out the wastewater treatment method of the present invention, and FIG.
Flowchart for explaining the basic embodiment of the wastewater treatment method of the present invention using the apparatus shown in the figure, Part 3.
The figure is a flowchart for explaining the first embodiment of the invention, FIG. 4 is a flowchart for explaining the second embodiment of the invention, and FIG. 5 is a flowchart for explaining the third embodiment of the invention. flowchart for,
FIG. 6 is a flow chart for explaining the fourth embodiment of the present invention, and FIG. 7 is a flow chart for explaining the fifth embodiment of the present invention. 1... High-rise building, 2... Shaft, 3... Deep aeration tank, 4... Downflow pipe, 5... Upflow pipe, 6
...Connection pipe, 7...Sludge settling chamber, 8...Sludge separation tank, 23, 24...Gate valve, 25...Dehydrator, 2
8...Rotating disk type filter medium, 30, 31...Inspection hole,
33... Contact oxidation filter medium, 34... Denitrification tank, 38...
...Tube, 40...Flotation tank.

Claims (1)

[Scope of Claims] 1 A high-rise building is provided with a downward flow pipe and an upward flow pipe that are approximately the same height as the entire height of the high-rise building, and the lower ends of these downward flow pipes and the upward flow pipe are provided. A connecting pipe is provided between the lower ends to communicate these, forming an aeration tank, and a sludge settling chamber is provided in the connecting pipe, and a funnel-shaped recess is formed in the bottom of the sludge settling chamber, and the bottom of the recess is A pipe is attached to discharge excess sludge to allow the excess sludge to settle, while air is forced downward into the wastewater in the downward flow pipe, and wastewater from the upper part of the upward flow pipe is returned to the upper part of the downward flow pipe. A wastewater treatment method using high-rise buildings, which is characterized by circulating wastewater and treating it by deep aeration. 2. In the aeration-type wastewater treatment mentioned above, gate valves are installed above the connecting pipes in the lower part of the upflow pipe and the downflow pipe of the aeration tank to adjust the flow rate and flow rate of the wastewater. A wastewater treatment method using a high-rise building according to claim 1, characterized in that: 3. In the aeration-type wastewater treatment mentioned above, a part of the wastewater is extracted from the middle part of the upward flow pipe of the aeration tank, and this extracted wastewater and inflowing raw water are guided to the flotation tank to remove harmful substances in the inflowing raw water. A wastewater treatment method using a high-rise building according to claim 1, characterized in that flotation separation is carried out using liquid head pressure in a deep aeration tank. 4. In the aeration-type wastewater treatment described above, a sludge separation tank communicating with the sludge settling chamber is provided near the upper end of the upward flow pipe of the aeration tank, and excess sludge settled in the sludge settling chamber is transferred to the deep aeration tank. A wastewater treatment method using a high-rise building according to claim 1, characterized in that solid-liquid separation is performed using liquid head pressure. 5. In the aeration-type wastewater treatment mentioned above, the excess sludge settled in the sludge settling chamber is led to the dehydrator, and the liquid head pressure in the deep aeration tank is used to power the dehydrator to dewater the excess sludge. A wastewater treatment method using a high-rise building according to claim 1. 6. The above-mentioned aeration-type wastewater treatment is characterized in that a rotating disk type filter medium is provided at the upper part of the upward flow pipe of the aeration tank, and the rotating disk type filter medium is rotated using the upward flow energy of the wastewater. A wastewater treatment method using a high-rise building according to claim 1. 7 In the aeration-type wastewater treatment mentioned above, a contact oxidation filter medium is installed in the above-mentioned continuous pipe, and a denitrification tank is installed above the upward flow pipe of the aeration tank to continuously remove BOD components and nitrogen content in the wastewater. 2. The wastewater treatment method using a high-rise building according to item 1, characterized in that the wastewater treatment method is performed using a high-rise building. 8. In the aeration-type wastewater treatment described above, each of the continuous pipes is provided with an inspection hole so that inspection, cleaning, and equipment can be carried in and out of the continuous pipes. Wastewater treatment method using high-rise buildings.