CN212532659U - Facultative anaerobic membrane bioreactor with near zero discharge of sludge reduction - Google Patents
Facultative anaerobic membrane bioreactor with near zero discharge of sludge reduction Download PDFInfo
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- CN212532659U CN212532659U CN202020927031.2U CN202020927031U CN212532659U CN 212532659 U CN212532659 U CN 212532659U CN 202020927031 U CN202020927031 U CN 202020927031U CN 212532659 U CN212532659 U CN 212532659U
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Abstract
The utility model provides a facultative membrane bioreactor of nearly zero release of mud decrement, including equalizing basin, reaction tank, clear water tank, membrane separation system, suction system, back flush system, aeration systems, charge system, mixing system and control system, the reaction tank has facultative membrane biological reaction district, membrane separation system arranges the reaction tank in, suction system and membrane separation system intercommunication are arranged in taking out the filtrating in the membrane separation system. The facultative membrane bioreactor forms a composite bacterial phase shape with coexisting facultative bacteria and aerobic bacteria by controlling aeration distribution, and solves the problems of large oxygen consumption, poor denitrification and dephosphorization effects and the like of the conventional MBR. Stirring the reaction tank through a stirring system, keeping the activity of microorganisms, enabling thalli to symbiotically exist in the reaction tank, synchronously removing C, N, P and other pollutants and sludge in sewage, and greatly increasing the activity range of facultative microorganisms by using the filler, thereby increasing the pollutant removal efficiency and finally realizing the near zero emission of the sludge.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a facultative anaerobic membrane bioreactor with near zero discharge of sludge reduction.
Background
With the gradual and deep research and development of Membrane Bioreactors (MBR), the process is gradually and widely applied in China. The Membrane Bioreactor (MBR) process is a biochemical reaction system formed by combining a membrane component and a bioreactor. Membrane Bioreactors (MBR) have the following problems to be solved: firstly, a Membrane Bioreactor (MBR) needs to discharge sludge, and the sludge discharge amount is relatively large; secondly, the Membrane Bioreactor (MBR) has high energy consumption. In order to ensure the flushing aeration of the membrane and the oxygen required for degrading pollutants by aerobic microorganisms, a high-power blower is required for aeration; and thirdly, the Membrane Bioreactor (MBR) has higher control requirement and needs sludge discharge and sludge backflow, so staff must be arranged on duty.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a facultative anaerobic membrane bioreactor of nearly zero release of mud decrement to solve the problem that provides among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a facultative membrane bioreactor with near zero discharge of sludge reduction comprises a regulating reservoir, a reaction tank, a clear water tank, a membrane separation system, a suction system, a back flush system, an aeration system, a dosing system, a stirring system and a control system, wherein the reaction tank is provided with a facultative membrane biological reaction area, the membrane separation system is arranged in the reaction tank, the suction system is communicated with the membrane separation system and is used for pumping filtrate in the membrane separation system, the back flush system is used for carrying out back flush on the membrane separation system, the aeration system is used for aerating the reaction tank and the membrane separation system, the dosing system is arranged above the reaction tank and is used for dosing in the reaction tank, the stirring system comprises a stirrer and a pneumatic stirring system and is used for stirring water in the reaction tank, a filler is arranged in the reaction tank, and the stirrer and the pneumatic stirring system are both arranged in a filler area, the control system is arranged above the reaction tank and used for controlling the integral operation of the reactor.
Preferably, one side top of equalizing basin is equipped with thick grid, and the opposite side bottom is equipped with the sewage elevator pump, switch on through the aqueduct between equalizing basin and the reaction tank, be equipped with the valve on the aqueduct, one side top of reaction tank is equipped with thin grid, the one end and the sewage elevator pump of aqueduct switch on, and the other end extends to the thin grid region.
Preferably, the bottom of the reaction tank close to the two sides of the membrane separation system is provided with an activated sludge reflux pump for refluxing activated sludge in the membrane separation system area to the filling area.
Preferably, the membrane separation system is an MBR membrane module, and a microfiltration membrane or an ultrafiltration membrane is selected.
Preferably, the suction system and the backwashing system both comprise a water production pipe connected with a water outlet pipe of the MBR membrane module, and one end of the water production pipe, which is far away from the water outlet pipe of the MBR membrane module, is provided with a suction pipe and a backwashing pipe in a communicating manner.
Preferably, the suction system further comprises a suction pipe, a suction pump, an electric valve, a negative pressure meter, a gate valve and a flowmeter, wherein the electric valve, the negative pressure meter, the gate valve and the flowmeter are all arranged on the suction pipe, the suction pipe is communicated with the suction pump, and one end, far away from the water production pipe, of the suction pipe is communicated with the top of the clean water tank.
Preferably, the backwashing system further comprises a backwashing pipe, an electric valve and a backwashing pump, the electric valve is arranged on the backwashing pipe, the backwashing pipe is communicated with the backwashing pump, and one end of the backwashing pipe, which is far away from the water production pipe, is communicated to the bottom of one side of the clean water tank.
Preferably, the pneumatic stirring system and the aeration system both comprise an air pump, an air outlet pipe connected with the air pump and a check valve arranged on the air outlet pipe, and one end of the air outlet pipe, which is far away from the air pump, is provided with an air outlet branch pipe and an aeration pipe in a conduction manner.
Preferably, the pneumatic stirring system further comprises an air outlet branch pipe, an electromagnetic valve and a pneumatic stirrer, wherein the electromagnetic valve is arranged on the air outlet branch pipe, and the pneumatic stirrer is arranged at the end part of the air outlet branch pipe.
Preferably, the aeration system further comprises an aerator pipe and an aerator, the aerator is communicated with the aerator pipe, and the aerator is intensively distributed in the membrane separation system area.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the facultative membrane bioreactor controls the dissolved oxygen concentration of more than 50% of the reaction tank to be less than 1mg/L through aeration, wherein the dissolved oxygen concentration of the membrane separation system area in the reaction tank is less than 2.0mg/L, the dissolved oxygen concentration of other areas is less than 1.0mg/L, and the dissolved oxygen concentration of the membrane separation system area is higher than that of other areas. By controlling aeration distribution, a composite bacterial phase shape with facultative bacteria and aerobic bacteria coexisting is formed, and the problems of large oxygen consumption, poor denitrification and dephosphorization effects and the like of the conventional MBR are solved.
(2) The facultative anaerobic membrane bioreactor stirs the reaction tank through the stirring system, keeps the activity of microorganisms, enables thalli in the reaction tank to symbiotically and synchronously removes pollutants such as C, N, P and sludge in sewage, and the filler greatly increases the activity range of facultative anaerobic microorganisms, thereby increasing the removal efficiency of pollutants and finally realizing the near zero emission of sludge.
(3) The facultative anaerobic membrane bioreactor only aerates the membrane separation system area, can reduce oxygen supply, saves aeration energy consumption, saves energy by more than 30 percent compared with the traditional Membrane Bioreactor (MBR) process, cultivates a microbial system mainly comprising facultative anaerobes, and can efficiently degrade pollutants in water. The system can still normally operate under the condition of not discharging sludge, the sludge concentration of the reaction tank can be self-adjusted along with the change of the water inlet concentration, and finally the system forms dynamic balance; the control requirement is greatly reduced, and unattended operation is realized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Illustration of the drawings: 1-coarse grating; 2-a stirrer; 3-fine grating; 4-a filler; 5-an electromagnetic valve; 6-a dosing system; 7-a membrane separation system; 8, an air pump; 9-a check valve; 10-electric valve; 11-a backwash pump; 12-a negative pressure gauge; 13-a suction pump; 14-a gate valve; 15-clear water tank; 16-a flow meter; 17-a control system; 18-activated sludge recirculation pump; 19-an aerator; 20-a pneumatic stirrer; 21-sewage lift pump.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, the present invention provides a technical solution: a facultative membrane bioreactor with near zero discharge of sludge reduction comprises a regulating tank, a reaction tank, a clear water tank 15, a membrane separation system 7, a suction system, a back flushing system, an aeration system, a dosing system 6, a stirring system and a control system 17, wherein the reaction tank can adopt reaction vessels in the prior art such as a reaction tank, the reaction tank is provided with a facultative membrane biological reaction area, the membrane separation system 7 is arranged in the reaction tank, the suction system is communicated with the membrane separation system 7 and is used for sucking filtrate in the membrane separation system 7, the back flushing system is used for carrying out back flushing on the membrane separation system 7, the aeration system is used for aerating the reaction tank and the membrane separation system 7, the dosing system 6 is arranged above the reaction tank and is used for dosing in the reaction tank, the stirring system comprises a stirrer 2 and a pneumatic stirring system and is used for stirring water in the reaction tank, the reactor is characterized in that a filler 4 is arranged in the reaction tank, the stirrer 2 and the pneumatic stirring system are both arranged in the region of the filler 4, and the control system 17 is arranged above the reaction tank and used for controlling the whole operation of the reactor.
One side top of equalizing basin is equipped with thick grid 1, and the opposite side bottom is equipped with sewage elevator pump 21, switch on through the aqueduct between equalizing basin and the reaction tank, be equipped with the valve on the aqueduct, one side top of reaction tank is equipped with thin grid 3, the one end and the sewage elevator pump 21 of aqueduct switch on, and the other end extends to thin grid 3 region, intercepts the large granule pollutant in the sewage through thick grid 1, further filters through thin grid 3. And the bottoms of the two sides of the reaction tank, which are close to the membrane separation system 7, are provided with activated sludge return pumps 18 for returning activated sludge in the membrane separation system 7 area to the filler 4 area.
The membrane separation system 7 is an MBR membrane component, a microfiltration membrane or an ultrafiltration membrane is selected, small-particle inorganic silt entering a reaction tank and organic sludge in sewage are intercepted in the reaction tank by the membrane separation system 7, aeration is carried out in the reaction tank through an aeration system, an aeration area is near the MBR membrane component, the dissolved oxygen concentration of more than 50% of the area of the reaction tank is less than 1mg/L, the dissolved oxygen concentration of the MBR membrane component is 1-2mg/L, the dissolved oxygen concentration range of other areas is 0.5-1mg/L, and the MBR membrane component can be washed by sprayed gas-water mixture during aeration.
The suction system and the backwashing system both comprise a water production pipe connected with a water outlet pipe of the MBR membrane component, and one end of the water production pipe, which is far away from the water outlet pipe of the MBR membrane component, is communicated with a suction pipe and a backwashing pipe. The suction system further comprises a suction pipe, a suction pump 13, an electric valve 10, a negative pressure meter 12, a gate valve 14 and a flow meter 16, wherein the electric valve 10, the negative pressure meter 12, the gate valve 14 and the flow meter 16 are all arranged on the suction pipe, the suction pipe is communicated with the suction pump 13, one end, far away from the water production pipe, of the suction pipe is communicated with the top of the clean water tank 15, and when water is produced, the suction system pumps water filtered out by the MBR membrane module through the suction pump 13 and enters the clean water tank 15. The backwashing system further comprises a backwashing pipe, an electric valve 10 and a backwashing pump 11, wherein the electric valve 10 is arranged on the backwashing pipe, the backwashing pipe is communicated with the backwashing pump 11, one end of the backwashing pipe, far away from the water production pipe, is communicated to the bottom of one side of the clear water tank 15, and when the MBR membrane module is cleaned, the backwashing system pumps clear water in the clear water tank 15 out through the backwashing pump 11 and enters the MBR membrane module through the backwashing pipe to clean the MBR membrane module.
Pneumatic mixing system and aeration system all include air pump 8, the outlet duct that links to each other with air pump 8 and set up check valve 9 on the outlet duct, the one end that air pump 8 was kept away from to the outlet duct switches on and is equipped with out gas and divides pipe and aeration pipe, aerates the reaction tank through air pump 8, provides power for the reaction tank stirring simultaneously. The pneumatic stirring system further comprises an air outlet branch pipe, an electromagnetic valve 5 and a pneumatic stirrer 20, wherein the electromagnetic valve 5 is arranged on the air outlet branch pipe, the pneumatic stirrer 20 is arranged at the end part of the air outlet branch pipe, and the water body is effectively stirred through the stirrer 2 and the pneumatic stirrer 20, so that the thallus is symbiotic in the reaction tank, and pollutants such as C, N, P in sewage and sludge are synchronously removed, and no organic residual sludge is discharged.
The aeration system also comprises an aeration pipe and an aerator 19, the aerator 19 is communicated with the aeration pipe, the aerator 19 is intensively distributed in the area of the membrane separation system 7, and the aeration quantity is intensively distributed in the area of the membrane separation system 7, so that the membrane separation system 7 is aerated and washed while the dissolved oxygen concentration gradient is generated in the reaction tank, and the aeration system preferably adopts a mode of combining micropore aeration and perforation aeration for aeration.
The working principle is as follows: the electric equipment for the reactor is electrically connected with an external distribution box, the control system 17 controls the whole operation of the reactor, sewage enters an adjusting tank after intercepting large-particle pollutants through a coarse grating 1, a sewage lifting pump 21 lifts the sewage to a fine grating 3 for further filtration and then enters a reaction tank for treatment, a medicine is added into the reaction tank through a medicine adding system 6, small-particle inorganic silt and organic sludge in the sewage which enter the reaction tank are intercepted in the reaction tank by a membrane separation system 7, aeration is carried out in the reaction tank through an aeration system, an aeration area is near the membrane separation system 7, the membrane separation system 7 is flushed while a dissolved oxygen concentration gradient is generated in the reaction tank, the reaction tank generates an aeration and facultative membrane biological reaction area, a stirrer 2 and a pneumatic stirrer 20 stir the reaction tank, the microbial activity is kept, thalli in the reaction tank are symbiotic, C in the sewage is synchronously removed, N, P, etc., and sludge, the filler 4 greatly increases the activity range of the facultative microorganisms, thereby increasing the pollutant removal efficiency, the treated sewage enters the membrane separation system 7, the membrane separation system 7 separates clear water under the action of the suction pump 13 and pumps the clear water to the clear water tank 15, the activated sludge reflux pump 18 pumps the activated sludge in the membrane separation system 7 area to the filler 4 area, thereby achieving near zero emission of organic sludge, and the backwash pump 11 regularly carries out online cleaning on the membrane separation system 7.
The foregoing merely illustrates preferred embodiments of the present invention, which are described in considerable detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes, modifications and substitutions can be made, which are all within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A facultative membrane bioreactor with near zero discharge of sludge reduction is characterized in that: comprises a regulating tank, a reaction tank, a clear water tank (15), a membrane separation system (7), a suction system, a back flushing system, an aeration system, a dosing system (6), a stirring system and a control system (17), wherein the reaction tank is provided with a facultative membrane biological reaction area, the membrane separation system (7) is arranged in the reaction tank, the suction system is communicated with the membrane separation system (7) and is used for pumping filtrate in the membrane separation system (7), the back flushing system is used for back flushing the membrane separation system (7), the aeration system is used for aerating the reaction tank and the membrane separation system (7), the dosing system (6) is arranged above the reaction tank and is used for dosing in the reaction tank, the stirring system comprises a stirrer (2) and a pneumatic stirring system which are used for stirring water in the reaction tank, a filler (4) is arranged in the reaction tank, the stirrer (2) and the pneumatic stirring system are both arranged in the region of the filler (4), the control system (17) is arranged above the reaction tank and used for controlling the whole operation of the reactor.
2. The facultative membrane bioreactor with near-zero sludge reduction according to claim 1, characterized in that: the device is characterized in that a thick grating (1) is arranged at the top of one side of the adjusting tank, a sewage lifting pump (21) is arranged at the bottom of the other side of the adjusting tank, the adjusting tank is communicated with the reaction tank through a water guide pipe, a valve is arranged on the water guide pipe, a thin grating (3) is arranged at the top of one side of the reaction tank, one end of the water guide pipe is communicated with the sewage lifting pump (21), and the other end of the water guide pipe extends to the area of the thin grating (3).
3. The facultative membrane bioreactor with near-zero sludge reduction according to claim 1, characterized in that: and both sides of the reaction tank close to the membrane separation system (7) are provided with activated sludge reflux pumps (18) for refluxing the activated sludge in the membrane separation system (7) area to the filler (4) area.
4. The facultative membrane bioreactor with near-zero sludge reduction according to claim 1, characterized in that: the membrane separation system (7) is an MBR membrane module, and a microfiltration membrane or an ultrafiltration membrane is selected.
5. The facultative membrane bioreactor with near-zero sludge reduction according to claim 4, characterized in that: the suction system and the backwashing system both comprise a water production pipe connected with a water outlet pipe of the MBR membrane component, and one end of the water production pipe, which is far away from the water outlet pipe of the MBR membrane component, is communicated with a suction pipe and a backwashing pipe.
6. The facultative membrane bioreactor with near-zero sludge reduction according to claim 5, characterized in that: the suction system further comprises a suction pipe, a suction pump (13), an electric valve (10), a negative pressure meter (12), a gate valve (14) and a flowmeter (16), wherein the electric valve (10), the negative pressure meter (12), the gate valve (14) and the flowmeter (16) are all arranged on the suction pipe, the suction pipe is communicated with the suction pump (13), and one end, far away from the water production pipe, of the suction pipe is communicated with the top of the clean water tank (15).
7. The facultative membrane bioreactor with near-zero sludge reduction according to claim 5, characterized in that: the backwashing system further comprises a backwashing pipe, an electric valve (10) and a backwashing pump (11), wherein the electric valve (10) is arranged on the backwashing pipe, the backwashing pipe is communicated with the backwashing pump (11), and one end of the backwashing pipe, which is far away from the water production pipe, is communicated to the bottom of one side of the clear water tank (15).
8. The facultative membrane bioreactor with near-zero sludge reduction according to claim 1, characterized in that: pneumatic stirring system and aeration system all include air pump (8), the outlet duct that links to each other with air pump (8) and set up check valve (9) on the outlet duct, the one end that air pump (8) were kept away from to the outlet duct switches on and is equipped with gas outlet branch pipe and aeration pipe.
9. The facultative membrane bioreactor with near-zero sludge reduction according to claim 8, characterized in that: the pneumatic stirring system further comprises an air outlet branch pipe, an electromagnetic valve (5) and a pneumatic stirrer (20), wherein the electromagnetic valve (5) is arranged on the air outlet branch pipe, and the pneumatic stirrer (20) is arranged at the end part of the air outlet branch pipe.
10. The facultative membrane bioreactor with near-zero sludge reduction according to claim 8, characterized in that: the aeration system also comprises an aeration pipe and an aerator (19), the aerator (19) is communicated with the aeration pipe, and the aerator (19) is intensively distributed in the area of the membrane separation system (7).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020927031.2U CN212532659U (en) | 2020-05-27 | 2020-05-27 | Facultative anaerobic membrane bioreactor with near zero discharge of sludge reduction |
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| CN202020927031.2U CN212532659U (en) | 2020-05-27 | 2020-05-27 | Facultative anaerobic membrane bioreactor with near zero discharge of sludge reduction |
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| CN212532659U true CN212532659U (en) | 2021-02-12 |
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| CN202020927031.2U Active CN212532659U (en) | 2020-05-27 | 2020-05-27 | Facultative anaerobic membrane bioreactor with near zero discharge of sludge reduction |
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