JP2001212585A - Combined treatment method for single treatment cleaning tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combined treatment method for a single treatment septic tank for solving the disposal problem of a single treatment septic tank by evectively utilizing the existing single treatment septic tank and capable of treating domestic wastewater more inexpensively as compared with case newly purchasing a combined treatment septic tank. SOLUTION: In the method for the single treatment septic tank to perform combined treatment, a combined treatment apparatus having an aerobic tank for performing the aerobic treatment of wastewater, a sedimentation tank for performing the sedimentation and separation treatment of wastewater after aerobic treatment and a disinfection tank for performing the sterilization treatment of wastewater is connected to the existing single treatment septic tank for the cleaning treatment of excretion by a piping. The interior of the single treatment septic tank is held to an anaerobic state to be used as an anaerobic treatment chamber as a whole and the wastewater flowing out of the aerobic treatment chamber is allowed to flow in the aerobic tank of the combined treatment apparatus to be treated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for merging single treatment septic tanks.

[0002]

2. Description of the Related Art Conventionally, a single treatment septic tank has been used as an apparatus for purifying human waste. FIG. 5 is a schematic cross-sectional view showing a separate contact aeration type single treatment septic tank. Human waste flows into the sedimentation separation chamber 3 from the inflow port 2, is subjected to solid-liquid separation and anaerobic treatment, and is transferred to the contact aeration chamber 4.
In the contact aeration chamber 4, the transferred wastewater is agitated by air bubbles diffused from the diffusion pipe 7 and contacts the contact material 8,
Decomposition of organic substances and nitrification of ammonia are gradually performed by aerobic microorganisms. If the contact material 8 is continuously stirred, the biofilm is thickly deposited and clogged. Therefore, the biofilm is peeled off by periodically discharging air bubbles from the backwash tube 9. The wastewater that has passed through the contact aeration chamber 4 is subjected to sedimentation and separation of solids in the sedimentation chamber 5, and then the separated supernatant liquid is transferred to the disinfection chamber 6, sterilized with a chlorine agent, and then discharged. 10
It is released more.

[0003]

However, in the single treatment septic tank, the type of wastewater to be treated is limited to human waste.
There is a problem that household wastewater such as kitchen drainage, washing drainage, wash sink drainage, and bathtub bathroom drainage cannot be treated. This problem can be solved by removing the existing single treatment septic tank and installing a new combined treatment septic tank. However, not only is the construction cost high, but also many single treatment septic tanks are
Since it is made of RP, a new problem also arises regarding the disposal of the single treatment septic tank that is no longer needed. In addition, when burying a single treatment septic tank without excavating it, there is no problem with disposal, but another problem arises that land cannot be used effectively.

[0004] The present invention has been made in view of the above problems, and solves the disposal problem of the single treatment septic tank by effectively utilizing the existing single treatment septic tank.
It is an object of the present invention to provide a method of merging a single treatment septic tank, which can process domestic wastewater at a lower cost than purchasing a new merger treatment septic tank.

[0005]

The present invention relates to the following. (1) An aerobic tank for performing aerobic treatment of wastewater, a sedimentation tank for performing sedimentation separation of aerobic treated wastewater, and a sterilization treatment of wastewater for an existing single treatment septic tank that purifies human waste. A disinfecting tank for carrying out the process is connected by piping, and the inside of the single treatment septic tank is maintained in an anaerobic state, and the whole is used as an anaerobic treatment chamber, and the wastewater flowing out of the anaerobic treatment chamber is discharged as described above. A method of merging a single treatment septic tank, wherein the single treatment septic tank is flowed into an aerobic tank of a merger processing apparatus for processing. (2) The method for merging a single treatment septic tank according to the above (1), wherein the sludge at the bottom of the aerobic tank of the merger treatment apparatus is returned to the single treatment septic tank. (3) The single treatment septic tank according to (1) or (2), wherein the wastewater flowing from the single treatment septic tank to the merged treatment apparatus flows into the merged treatment apparatus via the flow rate adjustment tank. Merger processing method.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The single treatment septic tank used in the present invention is not particularly limited as long as it can purify human waste. Specifically, as described in the prior art, It is possible to use one having an inlet and an outlet and having a sedimentation separation chamber, a contact aeration chamber, a sedimentation chamber, a disinfection chamber, and the like provided therein from the upstream side. However, if a disinfectant such as a chlorine agent is installed in the disinfection room, remove it.

[0007] The single treatment septic tank used in the present invention is used as an anaerobic treatment chamber when it is connected to a merged treatment apparatus described later by piping. Therefore, if there is a tank for performing aerobic treatment such as a contact aeration chamber in the single treatment septic tank, equipment such as a diffuser tube used to maintain the aerobic state is stopped or removed. Further, the contact material or the like may be used as it is, but it is preferable to replace the contact material with a randomly filled filter material. This is because the filter medium used for aerobic treatment is often regularly packed, so that drainage is difficult to diffuse, and the use of the randomly packed filter medium allows the space to be used more effectively. is there.

[0008] The combined treatment apparatus used in the present invention is an aerobic tank for performing aerobic treatment of wastewater, a sedimentation tank for performing sedimentation separation of wastewater subjected to aerobic treatment, and for performing sterilization treatment of wastewater. Disinfection tank.

The aerobic tank is not particularly limited as long as the inside of the tank is maintained in an aerobic state using a diffuser tube or the like and aerobic treatment of wastewater by aerobic microorganisms can be performed. Air is blown out from below the filter medium layer filled with the filter medium by a diffuser tube to maintain the aerobic state and to stir the filter medium periodically so that the filter medium layer is not blocked by a biofilm. A tank with a backwash pipe that discharges foam,
It can be suitably used.

[0010] The filter medium used in the aerobic tank can hold a large amount of aerobic microorganisms.
Lent, small cylindrical, corrugated, tube, fiber entangled synthetic resin molded articles, synthetic resin molded articles with closed or open cells, anthracite (anthracite), silica sand And inorganic materials such as ceramics can be suitably used.

Means for returning the sludge deposited at the bottom of the aerobic tank to the single treatment septic tank is not particularly limited,
Specifically, an air lift pump can be suitably used. The return of the sludge is used to remove nitrogen in the wastewater, and it is preferable that the sludge is always returned, and it is preferable that the return of the sludge is returned as upstream as possible of the single treatment septic tank.

The sedimentation tank is not particularly limited as long as the sedimentation and separation of the wastewater subjected to the aerobic treatment in the aerobic tank is not particularly limited.
A solution in which the supernatant liquid separated by sedimentation is transferred to the next disinfection tank from above the tank can be suitably used.

The disinfecting tank is not particularly limited as long as it can sterilize wastewater flowing from the sedimentation tank. Specifically, a disinfecting tank that is sterilized by contact with a chlorine agent is preferably used. be able to.

[0014] In order to transfer the wastewater from the single treatment septic tank to the merged treatment apparatus, it is possible to connect the outlet of the existing single treatment septic tank to the inlet of the aerobic tank of the merged treatment apparatus by piping. Becomes Further, when the wastewater is transferred to the aerobic tank, it is preferable to transfer the wastewater through the flow rate adjustment tank because a large amount of the wastewater is not transferred at once, so that the wastewater treatment can be stably performed.

The wastewater that can be treated by the present invention is
There is no particular limitation as long as the wastewater is discharged from facilities and the like. Specifically, household wastewater such as kitchen wastewater (including disposer wastewater), laundry wastewater, washbasin wastewater, and bathtub / bathroom wastewater, as well as human waste. Can be processed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which a combined treatment apparatus is connected to a single treatment septic tank by piping. (A) shows a schematic plan view, and (b) shows a schematic sectional side view. The single treatment septic tank 13 is an existing one, and its internal structure is
A first inlet 11, an anaerobic treatment chamber 17, an aerobic treatment chamber 18, a sedimentation chamber 21, a disinfection chamber 22, and a first outlet 12 are provided from the upstream side. Then, in order to enable the merging treatment using the single treatment septic tank 13, a new merging treatment device 16 is installed, and the discharge of air bubbles from the air diffuser 19 installed in the aerobic treatment chamber 18 is stopped. Let it.

The merging treatment device 16 has a contact aeration tank 23 used as an aerobic tank therein, and the contact aeration tank 23 prevents water from passing through the tank by blocking the passage of the filter medium inside the tank. By installing the members 35 and 36,
The filter medium 27 is filled between 5 and 36. An air diffuser 26 is provided below the water passage member 36, and the air diffuser 26
It is used for aerobic treatment and constantly discharges air bubbles. In addition, an air diffuser 26 is provided below the water passage member 36.
In addition, a backwash tube 28 is provided.
Is used at the time of washing to remove a biofilm attached to the filter medium 27, and discharge air bubbles once a day for about 1 to 30 minutes. Further, a settling tank 24 is provided downstream of the contact aeration tank 23.
And a disinfection tank 25.

Separate treatment septic tank 13 and merger treatment equipment 16
Is connected by connecting the first outflow port 12 and the second inflow port 14 with an advection pipe 37. At this time, the disinfectant in the disinfecting chamber 22 of the single treatment / purification tank 13 is removed. .

Explaining the method of wastewater treatment, human waste discharged from home, kitchen wastewater (including disposer wastewater), washbasin wastewater, washing wastewater and bathtub bathroom wastewater (hereinafter collectively referred to as wastewater) are supplied to the first inlet. Anaerobic treatment room 1 from 11
7, and is subjected to solid-liquid separation and anaerobic treatment. After the wastewater passes through the anaerobic treatment chamber 17, the aerobic treatment chamber 18,
The aerobic treatment chamber 18, the sedimentation chamber 21, and the disinfection chamber 22 all kept in an anaerobic state by stopping the discharge of air bubbles from the air diffuser 19, though passing through the sedimentation chamber 21 and the disinfection chamber 22 sequentially. The solid-liquid separation and the anaerobic treatment are continuously performed.

The waste water that has passed through the disinfection chamber 22 of the single treatment septic tank 13 passes through the advection pipe 37 from the first outlet 12 and the contact aeration tank 23 through the second inlet 14 provided in the combined treatment apparatus 16. Flows into. The contact aeration tank 23 is maintained in an aerobic state by air bubbles discharged from the air diffuser 26, and the wastewater passes through the filter medium 27, whereby aerobic microorganisms decompose organic substances and nitrify ammonia. In addition, if the drainage is continuously passed through the filter medium 27, the biofilm becomes thicker and becomes blocked, so that more air bubbles are periodically discharged from the backwash pipe 28 than the diffuser pipe 26 to stir the filter medium 27. And perform washing.

The wastewater that has passed through the contact aeration tank 23 flows into the settling tank 24, where solid-liquid separation is performed, and aerobic treatment is continued by dissolved oxygen carried over from the contact aeration tank 23. Then, it is sterilized by contacting with a chlorine agent in the disinfecting tank 25 and discharged from the second outlet 15.

FIG. 2 is a diagram in which a sludge transfer device is added to the combined treatment device shown in FIG. 1, (a) is a schematic plan view, and (b) is a schematic sectional side view. In this embodiment,
A sludge transfer device 29 is provided in the contact aeration tank 23 of the merger processing device 16. In the sludge transfer device 29, the sludge extraction pipe 31 is an air lift pump, and the transfer pump 30
, The sludge and the drainage are raised, and the sludge and the drainage are returned to the anaerobic treatment chamber 17 of the single treatment / purification tank 13 by the sludge transfer pipe 32. In the present embodiment, the transfer pump 30 is always operated to constantly return sludge and wastewater, thereby performing anaerobic treatment and removing nitrogen components in wastewater in the single treatment / purification tank 13. Further, the returned sludge remains without being decomposed, and can be reprocessed to be decomposed to reduce the amount of sludge.

FIG. 3 is a schematic cross-sectional side view in which a flow control tank is added to the combined processing apparatus shown in FIG. In the present embodiment, the wastewater is not directly transferred from the single treatment septic tank 13 to the contact aeration tank 23, but once flows into the flow rate adjustment tank 33, and then transferred to the contact aeration tank 23 using the pump 34. are doing. When the flow rate adjusting tank 33 is provided in this manner, regardless of the fluctuation of the amount of wastewater flowing into the single treatment / purification tank 13,
Since a fixed amount of advection to the contact aeration tank 23 becomes possible, stable drainage treatment can be performed.

FIG. 4 is a schematic side sectional view showing a flow control tank integrated with the merged processing apparatus shown in FIG. 3 and separate from the merged processing apparatus. In the present embodiment, since the flow rate adjusting tank 33 and the merger processing apparatus 16 are provided separately, the flow rate adjusting tank 3
Since only 3 is buried underground and the wastewater is transferred to the merged treatment device 16 by the pump 34, the merged treatment device 16 can be installed on the ground.

[0025]

According to the present invention, wastewater can be treated by using the existing single treatment septic tank, so that the treatment can be performed at a lower cost than disposing the single treatment septic tank and installing a new combined treatment septic tank. It is possible to do so, and there is no need to dispose of a single treatment septic tank. In addition, when a flow control tank is provided in the merged treatment device, stable drainage treatment can be performed, particularly when the merged treatment device and the flow control tank are not integrated with each other but are connected as separate pipes. Since only the flow control tank needs to be buried underground, installation can be performed easily and inexpensively.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention, in which a combined treatment apparatus is connected to a single treatment septic tank by piping, (a) showing a schematic plan view, and (b) showing a schematic sectional side view.

FIG. 2 is a diagram in which a sludge transfer device is added to the combined treatment device shown in FIG. 1, (a) is a schematic plan view,
(B) shows a schematic side sectional view.

FIG. 3 is a schematic side sectional view in which a flow control tank is added to the combined processing apparatus shown in FIG. 1;

FIG. 4 is a schematic side sectional view showing a flow control tank integrated with the merged processing apparatus shown in FIG. 3 and separated from the merged processing apparatus.

FIG. 5 is a schematic cross-sectional view of a separate treatment aeration type single treatment septic tank showing a conventional example.

[Explanation of symbols]

1. Separate treatment septic tank 2. Inlet 3. Sedimentation separation chamber 4. 4. Contact aeration chamber Settling chamber 6. Disinfection room 7. 7. diffuser tube Contact material 9. Backwash tube 10. Outlet 11. First inlet 12. First outlet 13. Separate treatment septic tank 14. Second inlet 15. Second outlet 16. Merger processing device 17. Anaerobic treatment room 18. Aerobic treatment room 19. Diffuser 20. Aerobic filter media 21. Sedimentation chamber 22. Disinfection room 23. Contact aeration tank 24. Sedimentation tank 25. Disinfection tank 26. Diffuser 27. Filter medium 28. Backwash tube 29. Sludge transfer device 30. Transfer pump 31. Sludge withdrawal pipe 32. Sludge transfer pipe 33. Flow control tank 34. Pump 35. Water passing member 36. Water passing member 37. Advection tube

Claims (3)

[Claims] An aerobic tank for performing aerobic treatment of wastewater, a sedimentation tank for performing sedimentation separation of aerobic treated wastewater, and a wastewater treatment system for an existing single treatment septic tank for purifying human waste. A disinfecting tank for performing a sterilization treatment is connected by piping to a combined treatment apparatus having a disinfecting tank, the inside of the single treatment septic tank is kept in an anaerobic state, and the whole is used as an anaerobic treatment chamber, and wastewater flowing out of the anaerobic treatment chamber is used. Is flowed into an aerobic tank of the above-mentioned merger processing apparatus, and is processed. 2. The sludge at the bottom of the aerobic tank of the merged treatment plant,
2. The method according to claim 1, wherein the wastewater is returned to the single treatment septic tank.
Method of merging single treatment septic tanks described in 1 above. 3. The merger of the single treatment septic tanks according to claim 1 or 2, wherein the wastewater flowing from the single treatment septic tank into the merger treatment apparatus flows into the merger treatment apparatus via the flow control tank. Processing method.