CN210683343U - Rural domestic sewage MBR integration processing apparatus - Google Patents
Rural domestic sewage MBR integration processing apparatus Download PDFInfo
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- CN210683343U CN210683343U CN201921559277.2U CN201921559277U CN210683343U CN 210683343 U CN210683343 U CN 210683343U CN 201921559277 U CN201921559277 U CN 201921559277U CN 210683343 U CN210683343 U CN 210683343U
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Abstract
The utility model relates to a sewage treatment technical field discloses a rural domestic sewage MBR integration treatment device, including sewer and the facultative tank, oxygen deficiency pond, anaerobism pond and the membrane cisterna that communicates in proper order, facultative tank, oxygen deficiency pond, anaerobism pond all are equipped with the inlet channel who communicates with the sewer, all be provided with the aeration subassembly in facultative tank and the membrane cisterna, be provided with reflux unit in the membrane cisterna, reflux unit's output and facultative tank intercommunication, the membrane cisterna side is provided with the clean water basin, be provided with the membrane module in the membrane cisterna, the membrane module is through producing water pump and clean water basin intercommunication. The utility model discloses can realize reducing the dissolved oxygen concentration's of the mixed liquid of backward flow in anoxic zone and the anaerobic zone purpose.
Description
Technical Field
The utility model relates to a sewage treatment technical field specifically indicates a rural domestic sewage MBR integration processing apparatus.
Background
Along with the rapid growth of the economy of China, the urbanization process is accelerated, the living standard of the rural area is continuously improved, the industries such as livestock and poultry cultivation, aquaculture, agricultural and sideline product processing and the like of the rural area are developed, and the production amount and the daily increase of domestic sewage and wastewater of the rural area are greatly increased. The concentration of organic matters contained in rural domestic sewage is relatively high; and the fertilizer contains high human and animal excrement and urine components, and has high nitrogen and phosphorus contents, especially phosphorus contents. Therefore, the treatment needs to reduce organic matters and remove nitrogen and phosphorus. MBR is Membrane bioreactor (Membrane Bio-Reactor) for short, is a novel water treatment technology that organically combines Membrane separation technology and biotechnology, and it utilizes Membrane separation equipment to retain activated sludge and macromolecular organic matters in the biochemical reaction tank, saves the secondary sedimentation tank, can realize effectively getting rid of organic matters and nitrogen and phosphorus, and the play water is stable, and degree of automation is high. The MBR combined process form capable of realizing nitrogen and phosphorus removal at present comprises AO + MBR (anoxic, aerobic and MBR process) and A2O + MBR (anaerobic, anoxic, aerobic + MBR process), and the like.
However, the existing integrated MBR sewage treatment system applied to rural water still has the following defects: in order to realize synchronous nitrogen and phosphorus removal, the two processes are mostly AO + MBR process or AAO + MBR process, and the aerobic tank is required to carry out nitration liquid reflux to the anoxic tank so as to realize the removal of total nitrogen. The nitrifying liquid flows back in two ways: 1. nitrifying liquid directly flows back to the anoxic tank or the anaerobic tank from the membrane tank, and because the dissolved oxygen concentration of the membrane tank is very high and is generally greater than 5mg/L, the dissolved oxygen concentration of the anoxic zone or the anaerobic zone is usually high (the dissolved oxygen concentration of the anoxic zone is less than 0.5mg/L, denitrifying bacteria can realize effective denitrification, the dissolved oxygen concentration of the anaerobic zone is required to be less than 0.2mg/L), the denitrification or dephosphorization effect is influenced, and in addition, the phosphorus removal effect can be influenced because the mixed liquid flowing back to the anaerobic zone contains nitrate; 2. in order to ensure the concentration of dissolved oxygen in the anoxic tank, the nitrified liquid firstly flows back to the aerobic tank from the membrane tank and then flows back to the anoxic tank from the aerobic tank.
SUMMERY OF THE UTILITY MODEL
Based on the above problem, the utility model provides a rural domestic sewage MBR integration treatment device. The utility model discloses can realize reducing the purpose of the dissolved oxygen concentration of the mixed liquid of backward flow in anoxic zone and the anaerobic zone, through setting up facultative tank, oxygen deficiency pond, anaerobism pond and the membrane cisterna that communicates in proper order, be provided with reflux unit in the membrane cisterna, reflux unit's output and facultative tank intercommunication have solved among the current MBR sewage treatment device, the higher problem of dissolved oxygen concentration of the mixed liquid of backward flow in anoxic zone and the anaerobic zone.
For solving the above technical problem, the utility model discloses a technical scheme as follows:
the utility model provides a rural domestic sewage MBR integration treatment device, includes the common intake manifold and the facultative tank, oxygen deficiency pond, anaerobism pond and the membrane cisterna that communicate in proper order, facultative tank, oxygen deficiency pond, anaerobism pond all are equipped with the inlet channel with the common intake manifold intercommunication, all be provided with the aeration subassembly in facultative tank and the membrane cisterna, be provided with reflux unit in the membrane cisterna, reflux unit's output and facultative tank intercommunication, the membrane cisterna side is provided with the clean water basin, be provided with the membrane module in the membrane cisterna, the membrane module is through producing water pump and clean water basin intercommunication.
In the utility model, sewage enters the facultative tank through the water inlet header pipe, nitrifying liquid in the membrane tank enters the facultative tank through the device and is mixed with sewage in the facultative tank, organic matters in facultative bacteria degradation water consume excessive dissolved oxygen at the same time, dissolved oxygen concentration in the sewage is reduced, simultaneously the facultative tank effluent enters the anoxic tank and is mixed with sewage from the water inlet header pipe, denitrifying bacteria perform denitrification reaction in the anoxic tank by utilizing a carbon source in the sewage discharged from the water inlet header pipe, nitrate nitrogen is converted into nitrogen, and denitrification is realized; the denitrified sewage enters an anaerobic tank, and simultaneously enters the anaerobic tank through a main water inlet pipe, and phosphorus accumulating bacteria release phosphorus stored in the body in the anaerobic tank; then the effluent of the anaerobic tank enters a membrane tank, the membrane tank is aerated and oxygenated through an aeration component, meanwhile, the membrane component is washed, the pollution speed of the membrane component is slowed down, phosphorus-accumulating bacteria super-absorb phosphorus in the sewage under aerobic conditions, organic nitrogen in the sewage is converted into nitrate and nitrite nitrogen by nitrobacteria and nitrite bacteria, and the remaining organic pollutants are further degraded by aerobic bacteria; the purified sewage enters a clean water tank through a water production pump, the sludge and sewage mixed liquor flows back to the facultative tank through a reflux device, and the produced water is discharged out of the device after staying in the clean water tank for a period of time.
The utility model discloses can realize reducing the purpose of the dissolved oxygen concentration of the mixed liquid of backward flow in anoxic zone and the anaerobic zone, through setting up facultative tank, oxygen deficiency pond, anaerobism pond and the membrane cisterna that communicates in proper order, be provided with reflux unit in the membrane cisterna, reflux unit's output and facultative tank intercommunication have solved among the current MBR sewage treatment device, the higher problem of dissolved oxygen concentration of the mixed liquid of backward flow in anoxic zone and the anaerobic zone.
As a preferred mode, facultative tank, oxygen deficiency pond, anaerobism pond and membrane pond all communicate through communicating pipe, be provided with into water distribution device in oxygen deficiency pond and the anaerobism pond, it all communicates with adjacent communicating pipe and inlet channel to advance water distribution device.
In a preferable mode, stirring devices are arranged in the anoxic tank and the anaerobic tank.
As a preferred mode, the reflux device is positioned at the bottom of the membrane tank and is far away from the water inlet end, the output end of the reflux device is provided with a reflux pipe and a sludge discharge pipe, and the reflux pipe is communicated with the facultative tank.
As a preferred mode, the membrane module is characterized by further comprising an equipment room, the equipment room is located on the side face of the clean water tank, an aeration fan is arranged in the equipment room and communicated with the aeration component through an aeration pipeline, and the water generating pump is located in the equipment room and communicated with the membrane module and the clean water tank through a water inlet pipe and a water outlet pipe.
As a preferred mode, a dosing device is further arranged in the equipment room, and the output end of the dosing device is communicated with the clean water tank through a water outlet pipe.
In a preferred embodiment, flow control valves are installed in the water inlet lines of the facultative tank, the anoxic tank and the anaerobic tank.
Preferably, the aeration fan is controlled by frequency conversion, and the reflux device is one of a submersible sewage pump and a stripping reflux device.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the utility model discloses can realize reducing the purpose of the dissolved oxygen concentration of the mixed liquid of backward flow in anoxic zone and the anaerobic zone, through setting up facultative tank, make the mixed liquid that the membrane pond backward flow came get into the facultative tank earlier and partly intake and mix, and adjust facultative tank inflow and aeration rate, control dissolved oxygen concentration 1.0-2.5mg/L, can effectively get rid of organic matter and ammonia nitrogen, can guarantee simultaneously that anoxic tank dissolved oxygen concentration <0.5mg/L, realize the effective of getting rid of the total nitrogen of anoxic tank, through facultative tank, the anoxic tank, the anaerobic tank segmentation is intake, can satisfy the anoxic tank respectively, the required carbon source of anaerobic tank, guarantee device nitrogen and phosphorus removal effect.
(2) The utility model discloses well facultative tank, oxygen deficiency pond, anaerobism pond and membrane cisterna all communicate through communicating pipe, be provided with the water distribution device of intaking in oxygen deficiency pond and the anaerobism pond, the water distribution device of intaking all communicates with adjacent communicating pipe and inlet channel, and for improving sewage treatment efficiency, the end of intaking of communicating pipe is higher than the water outlet end for facultative tank, oxygen deficiency pond and anaerobism pond all adopt the sewage discharge next link after the mode of overflow will be handled, make all intake equal evenly distributed in oxygen deficiency pond and anaerobism pond through the water distribution device of intaking, thereby improve the treatment effeciency of sewage once more.
(3) The utility model discloses be provided with agitating unit in well oxygen deficiency pond and the anaerobism pond, agitating unit can adopt current agitated vessel, includes promptly that the (mixing) shaft with set up at the epaxial stirring vane of stirring, the (mixing) shaft is connected with the output transmission of motor, can make the sewage in oxygen deficiency pond and the anaerobism pond obtain more thorough processing through agitating unit.
(4) The utility model discloses well reflux unit is located the membrane cisterna bottom and keeps away from the end setting of intaking, reflux unit's output is provided with back flow and sludge discharge pipe, back flow and facultative tank intercommunication can mix liquid and mud discharge with nitrifying in the membrane cisterna through reflux unit, and here reflux unit can adopt stealthily dirty pump or gaseous reflux unit, will nitrify when using and mix in liquid and go into facultative tank through the back flow, and mud then discharges through the sludge discharge pipe, has realized nitrifying liquid backward flow and surplus sludge's emission simultaneously, compares and has saved the energy consumption with the multistage backward flow.
(5) The utility model discloses in still including the equipment room, the equipment room is located the clean water basin side, be provided with aeration fan in the equipment room, aeration fan passes through aeration pipeline and aeration subassembly intercommunication, it is located the equipment room to produce the water pump to communicate with membrane module and clean water basin respectively through inlet tube and outlet pipe, increase the dissolved oxygen concentration in facultative tank and the membrane pond through aeration fan, because facultative tank's interior aeration volume needs the independent control, aeration fan can set up to two promptly, makes it provide different aeration volumes for facultative tank and membrane pond respectively, convenient to use, produce the water pump and take out and flow into in the clean water basin through the outlet pipe with the water after the membrane module in-process through the inlet tube.
(6) The utility model discloses all install flow control valve on the water inlet pipeline in facultative tank, oxygen deficiency pond and anaerobism pond, can realize adjusting respectively the sewage inflow in facultative tank, oxygen deficiency pond and anaerobism pond through flow control valve, be convenient for control carbon source content and dissolved oxygen concentration.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 facultative tank, 2 anoxic tank, 3 anaerobic tank, 4 membrane tank, 4.1 membrane module, 4.2 reflux unit, 5 clean water pond, 6 plant rooms, 6.1 product water pump, 6.2 aeration fan, 6.3 charge device, 10 water inlet manifold, 11 aeration subassembly, 12 water distributor, 13 agitating unit, 14 flow control valve, 15 back flow, 16 motorised valve, 17 mud discharge pipe, 18 communicating pipe, 19 inlet channel.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.
Example 1:
referring to fig. 1, a rural domestic sewage MBR integration treatment device, including inlet manifold 10 and the facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3 and the membrane cisterna 4 that communicate in proper order, facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3 all are equipped with the inlet channel 19 with inlet manifold 10 intercommunication, all be provided with aeration component 11 in facultative tank 1 and the membrane cisterna 4, be provided with reflux unit 4.2 in the membrane cisterna 4, reflux unit 4.2's output and facultative tank 1 intercommunication, the membrane cisterna 4 side is provided with clean water basin 5, be provided with membrane module 4.1 in the membrane cisterna 4, membrane module 4.1 is through producing water pump 6.1 and clean water basin 5 intercommunication.
In the utility model, sewage enters the facultative tank 1 through the main water inlet pipe 10, nitrifying liquid in the membrane tank 4 enters the facultative tank 1 through the device and is mixed with sewage in the facultative tank 1, organic matters in facultative anaerobe degradation water consume excessive dissolved oxygen simultaneously, dissolved oxygen concentration in the sewage is reduced, simultaneously, water out of the facultative tank 1 enters the anoxic tank 2 and is mixed with sewage from the main water inlet pipe 10, denitrifying bacteria perform denitrification reaction in the anoxic tank 2 by utilizing a carbon source in the sewage discharged from the main water inlet pipe 10, nitrate nitrogen is converted into nitrogen, and denitrification is realized; the denitrified sewage enters the anaerobic tank 3, and simultaneously enters the anaerobic tank 3 through the main water inlet pipe 10, and phosphorus accumulating bacteria release phosphorus stored in the body in the anaerobic tank 3; then the effluent of the anaerobic tank 3 enters a membrane tank 4, the membrane tank 4 is aerated and oxygenated through an aeration component 11, meanwhile, the membrane component 4.1 is washed, the pollution speed of the membrane component 4.1 is reduced, phosphorus-accumulating bacteria excessively absorb phosphorus in the sewage under aerobic conditions, organic nitrogen in the sewage is converted into nitrate and nitrite nitrogen by nitrobacteria and nitrite bacteria, and the remaining organic pollutants are further degraded by aerobic bacteria; the purified sewage enters a clean water tank 5 through a water producing pump 6.1, the sludge and sewage mixed liquor flows back to the facultative tank 1 through a backflow device 4.2, and the produced water is discharged out of the device after staying for a period of time in the clean water tank 5.
The utility model discloses can realize reducing the purpose of the dissolved oxygen concentration of the mixed liquid of backward flow in anoxic zone and the anaerobic zone, through setting up facultative tank, make the mixed liquid that the membrane pond backward flow came get into the facultative tank earlier and partly intake and mix, and adjust facultative tank inflow and aeration rate, control dissolved oxygen concentration 1.0-2.5mg/L, can effectively get rid of organic matter and ammonia nitrogen, can guarantee simultaneously that anoxic tank dissolved oxygen concentration <0.5mg/L, realize the effective of getting rid of the total nitrogen of anoxic tank, through facultative tank, the anoxic tank, the anaerobic tank segmentation is intake, can satisfy the anoxic tank respectively, the required carbon source of anaerobic tank, guarantee device nitrogen and phosphorus removal effect.
Example 2:
referring to fig. 1, a rural domestic sewage MBR integration treatment device, including inlet manifold 10 and the facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3 and the membrane cisterna 4 that communicate in proper order, facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3 all are equipped with the inlet channel 19 with inlet manifold 10 intercommunication, all be provided with aeration component 11 in facultative tank 1 and the membrane cisterna 4, be provided with reflux unit 4.2 in the membrane cisterna 4, reflux unit 4.2's output and facultative tank 1 intercommunication, the membrane cisterna 4 side is provided with clean water basin 5, be provided with membrane module 4.1 in the membrane cisterna 4, membrane module 4.1 is through producing water pump 6.1 and clean water basin 5 intercommunication.
The facultative tank 1, the anoxic tank 2, the anaerobic tank 3 and the membrane tank 4 are communicated through the communicating pipes 18, the anoxic tank 2 and the anaerobic tank 3 are internally provided with the water inlet and distribution device 12, and the water inlet and distribution device 12 is communicated with the adjacent communicating pipes 18 and the water inlet pipeline 19.
In this embodiment, for improving sewage treatment efficiency, the end of intaking of communicating pipe can set up to being higher than out the water end for facultative tank, oxygen deficiency pond and anaerobism pond all adopt the mode of overflow to discharge the sewage after handling into next link, make all intake equal evenly distributed in oxygen deficiency pond and anaerobism pond through the water distribution device of intaking, thereby improve the treatment effeciency of sewage once more.
In a preferable mode, stirring devices 13 are arranged in the anoxic tank 2 and the anaerobic tank 3. In this mode, agitating unit can adopt current agitated vessel, includes the (mixing) shaft promptly and sets up at the epaxial stirring vane of stirring, and the (mixing) shaft is connected with the output transmission of motor, can make the sewage in oxygen deficiency pond and the anaerobism pond obtain more thorough processing through agitating unit.
As a preferable mode, the backflow device 4.2 is positioned at the bottom of the membrane tank 4 and is far away from the water inlet end, the output end of the backflow device 4.2 is provided with a backflow pipe 15 and a sludge discharge pipe 17, and the backflow pipe 15 is communicated with the facultative tank 1. In the mode, the nitrified mixed liquid and the sludge in the membrane tank can be discharged through the reflux device, the reflux device can adopt a submersible sewage pump or a gas reflux device, the nitrified mixed liquid is discharged into the facultative tank through the reflux pipe when the membrane tank is used, the sludge is discharged through the sludge discharge pipe, the nitrified liquid reflux and the residual sludge discharge are realized, and compared with multi-stage reflux, the energy consumption is saved.
As a preferable mode, the device room 6 is further included, the device room 6 is located on the side face of the clean water tank 5, an aeration fan 6.2 is arranged in the device room 6, the aeration fan 6.2 is communicated with the aeration component 11 through an aeration pipeline, and the water generating pump 6.1 is located in the device room 6 and is respectively communicated with the membrane component 4.1 and the clean water tank 5 through a water inlet pipe and a water outlet pipe. In this mode, increase the dissolved oxygen concentration in facultative tank and the membrane cisterna through aeration fan, because the interior aeration rate in facultative tank needs adjust alone, aeration fan can set up to two promptly, makes it provide different aeration rates for facultative tank and membrane cisterna respectively, convenient to use, and the water pump of producing takes out the water after the processing in with the membrane module through the inlet tube and flows into in the clear water pond through the outlet pipe.
As a preferable mode, a dosing device 6.3 is further arranged in the equipment room 6, and the output end of the dosing device 6.3 is communicated with the clean water tank 5 through a water outlet pipe.
Preferably, the aeration fan 6.2 is controlled by frequency conversion, and the reflux device 4.2 is one of a submersible sewage pump or a stripping reflux device 4.2.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
Example 3:
referring to fig. 1, a rural domestic sewage MBR integration treatment device, including inlet manifold 10 and the facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3 and the membrane cisterna 4 that communicate in proper order, facultative tank 1, oxygen deficiency pond 2, anaerobism pond 3 all are equipped with the inlet channel 19 with inlet manifold 10 intercommunication, all be provided with aeration component 11 in facultative tank 1 and the membrane cisterna 4, be provided with reflux unit 4.2 in the membrane cisterna 4, reflux unit 4.2's output and facultative tank 1 intercommunication, the membrane cisterna 4 side is provided with clean water basin 5, be provided with membrane module 4.1 in the membrane cisterna 4, membrane module 4.1 is through producing water pump 6.1 and clean water basin 5 intercommunication.
And the water inlet pipelines 19 of the facultative tank 1, the anoxic tank 2 and the anaerobic tank 3 are all provided with flow regulating valves 14.
In this embodiment, can realize adjusting respectively the sewage inflow in facultative tank, oxygen deficiency pond and anaerobism pond through flow control valve, be convenient for control carbon source content and dissolved oxygen concentration.
The other parts of this embodiment are the same as embodiment 1, and are not described herein again.
The embodiment of the present invention is the above. The specific parameters in the above embodiments and examples are only for the purpose of clearly showing the verification process of the present invention, and are not used to limit the patent protection scope of the present invention, which is still subject to the claims, and all the equivalent structural changes made by using the contents of the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a rural domestic sewage MBR integration processing apparatus which characterized in that: including water inlet manifold (10) and facultative tank (1), oxygen deficiency pond (2), anaerobism pond (3) and membrane cisterna (4) that communicate in proper order, facultative tank (1), oxygen deficiency pond (2), anaerobism pond (3) all are equipped with intake pipe (19) with water inlet manifold (10) intercommunication, all be provided with aeration subassembly (11) in facultative tank (1) and membrane cisterna (4), be provided with reflux unit (4.2) in membrane cisterna (4), the output and the facultative tank (1) intercommunication of reflux unit (4.2), membrane cisterna (4) side is provided with clean water basin (5), be provided with membrane module (4.1) in membrane cisterna (4), membrane module (4.1) are through producing water pump (6.1) and clean water basin (5) intercommunication.
2. The MBR integrated treatment device for rural domestic sewage according to claim 1, is characterized in that: facultative tank (1), oxygen deficiency pond (2), anaerobism pond (3) and membrane pond (4) all communicate through communicating pipe (18), be provided with into water distribution device (12) in oxygen deficiency pond (2) and anaerobism pond (3), it all communicates with adjacent communicating pipe (18) and inlet channel (19) to advance water distribution device (12).
3. The MBR integrated treatment device for rural domestic sewage according to claim 2, is characterized in that: and stirring devices (13) are arranged in the anoxic tank (2) and the anaerobic tank (3).
4. The MBR integrated treatment device for rural domestic sewage according to claim 1, is characterized in that: the reflux device (4.2) is positioned at the bottom of the membrane tank (4) and is far away from the water inlet end, the output end of the reflux device (4.2) is provided with a reflux pipe (15) and a sludge discharge pipe (17), and the reflux pipe (15) is communicated with the facultative tank (1).
5. The MBR integrated treatment device for rural domestic sewage according to claim 1 or 4, which is characterized in that: still include equipment room (6), equipment room (6) are located clean water basin (5) side, be provided with aeration fan (6.2) in equipment room (6), aeration fan (6.2) are through aeration pipeline and aeration subassembly (11) intercommunication, product water pump (6.1) are located equipment room (6) to communicate with membrane module (4.1) and clean water basin (5) respectively through inlet tube and outlet pipe.
6. The MBR integrated treatment device for rural domestic sewage according to claim 5, is characterized in that: still be provided with charge device (6.3) in equipment room (6), the output of charge device (6.3) is through outlet pipe and clean water basin (5) intercommunication.
7. The MBR integrated treatment device for rural domestic sewage according to claim 1, is characterized in that: and flow regulating valves (14) are respectively arranged on the water inlet pipelines (19) of the facultative tank (1), the anoxic tank (2) and the anaerobic tank (3).
8. The MBR integrated treatment device for rural domestic sewage according to claim 5, is characterized in that: the aeration fan (6.2) is controlled by frequency conversion, and the reflux device (4.2) is one of a submersible sewage pump or a stripping reflux device (4.2).
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| CN201921559277.2U CN210683343U (en) | 2019-09-19 | 2019-09-19 | Rural domestic sewage MBR integration processing apparatus |
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| CN201921559277.2U CN210683343U (en) | 2019-09-19 | 2019-09-19 | Rural domestic sewage MBR integration processing apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159681A (en) * | 2022-07-29 | 2022-10-11 | 江苏河马井股份有限公司 | Multistage good anaerobism sewage treatment system |
| CN115466019A (en) * | 2022-10-28 | 2022-12-13 | 成都天源水务有限责任公司 | Composite sewage treatment method |
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2019
- 2019-09-19 CN CN201921559277.2U patent/CN210683343U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115159681A (en) * | 2022-07-29 | 2022-10-11 | 江苏河马井股份有限公司 | Multistage good anaerobism sewage treatment system |
| CN115466019A (en) * | 2022-10-28 | 2022-12-13 | 成都天源水务有限责任公司 | Composite sewage treatment method |
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