MABR-MBBR-MBR combined integrated treatment device

Abstract

The utility model provides an MABR (Membrane Aerated Bed Reactor)-MBBR (Membrane Bio-Reactor)-MBR (Membrane Biological Reactor) combined integrated treatment device, which comprises an MABR, an MBBR moving bed bio-membrane reactor, an MBBR (Membrane Biofilm Reactor) and an MBR (Membrane Biofilm Reactor), the nitrification and denitrification reaction module is used for carrying out nitrification and denitrification reaction on the wastewater fed into the MBBR so as to reduce the content of organic matters and nitrogen and phosphorus pollutants in the wastewater; the MBR membrane bioreactor is communicated with the MBBR and is used for intercepting suspended matters and impurities in the wastewater fed into the MBR membrane bioreactor and further removing phosphorus in the wastewater fed into the MBR membrane bioreactor; the MABR membrane aeration bioreactor, the MBBR moving bed bio-membrane reactor and the MBR membrane bioreactor are all communicated with an air supply mechanism. According to the utility model, the removal of organic matters, nitrogen and phosphorus is enhanced, suspended solids and turbidity indexes are reduced, and the effluent is clear and can be reused as urban miscellaneous water.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to an integrated treatment device combining MABR-MBBR-MBR. Background Technique

[0002] Currently, the generally recognized sewage includes municipal sewage and domestic sewage. Municipal sewage refers to the sewage from the drainage systems of cities and towns, while domestic sewage refers to the sewage from households, schools, offices, and other living facilities. Although the two have different sources, both are the main emission sources of ammonia nitrogen and total nitrogen. Direct discharge will cause environmental pollution. Therefore, the low-carbon, high-efficiency, high cost-effectiveness, and sustainable treatment of these two types of sewage have become the top priorities of sewage treatment.

[0003] Traditional domestic sewage treatment processes have great difficulty in achieving efficient nitrogen removal under low-carbon conditions and require additional carbon sources. For example, when treating sewage, the most commonly used activated sludge process is used to treat domestic sewage. And the activated sludge process for treating domestic sewage requires adding organic substances that are easily biodegradable by microorganisms, such as ethanol and glycerol, to domestic sewage. During the sewage treatment process, the organic substances are utilized by microorganisms as carbon sources and at the same time supply energy, so as to ensure that there is enough biodegradable organic matter in the sewage for microorganisms to utilize, and to maintain the biodegradation ability and treatment efficiency of the activated sludge.

[0004] Although the activated sludge method can remove organic substances, nitrogen, and phosphorus in domestic sewage to a certain extent, since the activated sludge method is used to treat domestic sewage, usually a large amount of land is required for the construction of sewage treatment facilities and a large amount of energy is consumed. Therefore, it is of great significance to design an integrated treatment device combining MABR-MBBR-MBR that can enhance the treatment effect and reduce energy consumption and floor area, where MABR is a membrane aeration biofilm reactor, MBBR is a moving bed biofilm reactor, and MBR is a membrane bioreactor. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the above problems existing in the prior art and provide an integrated treatment device combining MABR-MBBR-MBR, which can more efficiently remove organic substances, nitrogen, and phosphorus in domestic sewage. At the same time, the combination of MABR-MBBR-MBR equipment reduces the land occupation and also reduces the energy consumption.

[0006] The utility model provides an integrated treatment device combining MABR-MBBR-MBR, including:

[0007] A MABR membrane aeration biofilm reactor, which is connected to a regulating tank lift pump through a pipeline;

[0008] MBBR Moving Bed Biofilm Reactor, which is connected to the MABR Membrane Aeration Bio-Reactor. The MBBR Moving Bed Biofilm Reactor includes an MBBR tank and a baffle plate. The baffle plate is inclined, with its high end connected to the side wall of the MBBR tank and its low end connected to the bottom wall of the MBBR tank;

[0009] MBR Membrane Bio-Reactor, which is connected to the MBBR Moving Bed Biofilm Reactor;

[0010] The MABR Membrane Aeration Bio-Reactor, the MBBR Moving Bed Biofilm Reactor, and the MBR Membrane Bio-Reactor are all connected to a gas supply mechanism.

[0011] Preferably, the MABR Membrane Aeration Bio-Reactor includes an MABR tank and at least one MABR membrane module. The MABR membrane module is arranged in the MABR tank and is connected to the gas supply mechanism. A first effluent weir is provided on the MABR tank, and the first effluent weir is connected to a regulating tank lift pump through a pipeline. A bent pipe is also provided on the MABR tank.

[0012] Preferably, a first baffle plate is arranged longitudinally in the MABR tank. The top end of the first baffle plate is fixed to the top of the MABR tank, and there is a gap between the bottom end of the first baffle plate and the bottom wall of the MABR tank. The first baffle plate divides the MABR tank into a first transition zone and a first reaction zone. The first effluent weir is located in the first transition zone, and the MABR membrane module is arranged in the first reaction zone.

[0013] Preferably, the MBBR Moving Bed Biofilm Reactor includes an MBBR tank, a plurality of activated sludge carrier fillers, and an aeration assembly. A second effluent weir is provided on the MBBR tank, and the second effluent weir is connected to the MABR tank through a bent pipe. The aeration assembly is arranged on the inner bottom wall of the MBBR tank and is connected to the gas supply mechanism. A plurality of activated sludge carrier fillers are filled in the MBBR tank, and a drain pipe is provided on the MBBR tank.

[0014] Preferably, a second baffle plate is arranged longitudinally in the MBBR tank. The top end of the second baffle plate is fixed to the top of the MBBR tank, and there is a gap between the bottom end of the second baffle plate and the bottom wall of the MBBR tank. The second baffle plate divides the MBBR tank into a second transition zone and a second reaction zone. The second effluent weir is located in the second transition zone, and a plurality of activated sludge carrier fillers and the aeration assembly are both arranged in the second reaction zone.

[0015] Preferably, the aeration assembly includes a horizontal air delivery pipe and a plurality of aeration heads. The horizontal air delivery pipe is provided on the bottom wall of the second reaction zone. The water outlet directions of the plurality of aeration heads are perpendicular to the axial direction of the horizontal air delivery pipe, and the plurality of aeration heads are communicated with the horizontal air delivery pipe. The horizontal air delivery pipe is communicated with an air supply mechanism. The high end of the inclined deflector is connected to the side wall of the second reaction zone, and the low end of the deflector is connected to the bottom wall of the second reaction zone. A grille plate is provided on the side wall of the second reaction zone close to the drain pipe. A backwashing pipe is provided on the back of the grille plate, and the backwashing pipe is communicated with the air supply mechanism.

[0016] Preferably, the air outlet end of the backwashing pipe is sealed, and two rows of air outlet openings are formed on the side wall of the air outlet end. The air outlet directions of the two rows of air outlet openings form a 45° angle with the back flat plate of the grille plate. The two rows of air outlet openings are arranged in parallel and staggered on the backwashing pipe, and any three adjacent air outlet openings in the two rows of air outlet openings can form an isosceles right triangle structure.

[0017] Preferably, the MBR membrane bioreactor includes an MBR membrane module and an MBR membrane tank. The MBR membrane module is provided in the MBR membrane tank, and the MBR membrane module is communicated with the air supply mechanism through a pipeline. The MBR membrane tank is connected to the MBBR tank through a drain pipe.

[0018] Preferably, a disinfection tank is further provided outside the MBR membrane tank. The disinfection tank is communicated with the MBR membrane tank through an MBR product water pump and a first pipeline. The water outlet of the MBR product water pump passes through a second pipeline and a third pipeline. A slow-release disinfector is connected to the second pipeline. The slow-release disinfector is communicated with the disinfection tank through a fourth pipeline. The third pipeline is also communicated with the fourth pipeline. Valves are provided on the second pipeline, the third pipeline and the fourth pipeline.

[0019] Preferably, an MBR backwashing water pump is provided outside the MBR membrane tank. The MBR backwashing water pump is communicated with the MBR membrane module through a pipeline. Valves are provided on the pipelines connecting all the MBBR moving bed biofilm reactors and the MBR membrane bioreactor to the air supply mechanism respectively.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] 1. The present utility model can more efficiently remove the enhanced organic matter, nitrogen and phosphorus in domestic sewage and reduce the suspended solids, with low energy consumption and small floor area.

[0022] 2. The MABR membrane aeration bioreactor in the present utility model can carry out nitrification and denitrification synchronously, and can efficiently remove organic matter, ammonia nitrogen, total nitrogen and partial total phosphorus in water. The MBBR moving bed biofilm reactor and the MBR membrane bioreactor enhance the biological phosphorus removal effect and reduce indicators such as suspended solids and turbidity in sewage through filtration by the MBR membrane bioreactor. The effluent is clear and can be reused as urban miscellaneous water.

[0023] 3. The integrated design of the MABR membrane aeration bioreactor, MBBR moving bed biofilm reactor and MBR membrane bioreactor in the present utility model is convenient for the transportation and installation of equipment, and can be flexibly applied to rural sewage, upgrading of municipal sewage, treatment of high-ammonia-nitrogen wastewater, etc. The commissioning of this integrated treatment device can be completed in 7 to 15 days, is less affected by temperature, and the system starts and recovers quickly after short-term shutdown.

[0024] 4. During the operation of the MBBR moving bed biofilm reactor in the present utility model, the effluent grille is prone to blockage. At this time, it is generally necessary to manually clean the grille, which causes inconvenience to the work of maintenance personnel. To solve this problem and considering cost reduction, a group of perforated pipes is added on the outlet side of the grille. The opening size, position and direction of the perforated pipes are reasonably designed, and the grille is regularly backflushed, which can effectively prevent the blockage of sludge and fillers.

[0025] 5. If the fillers in the MBBR moving bed biofilm reactor in the present utility model cannot be ensured to be in a uniform flow state during operation, it is easy to have a flow dead zone and cause the phenomenon of filler accumulation. The key to solving this problem is to optimize the pool structure and improve the aeration layout. The installation of the bottom aeration device generally has a certain distance from the surrounding pool walls, and it is easy to have filler accumulation here. In this patent, it is considered to change the hydraulic characteristics in the pool by changing the pool structure. A deflector is provided at the connection between the MBBR pool wall and the bottom plate on the side opposite to the baffle in the MBBR moving bed biofilm reactor, and both sides of the deflector are blocked along the length direction. The design of the inclined surface of the deflector prevents the fillers from staying at the bottom gap of the pool, thereby forcing cyclic movement and avoiding the accumulation of fillers in the corners of the pool.

[0026] 6. When the slow-release disinfector in the present utility model adds medicine to the disinfection pool, a pump is not required, the medicine addition is simple and the energy consumption is low. Description of the Drawings

[0027] Figure 1 It is a schematic diagram of an integrated treatment device combining MABR-MBBR-MBR of the present utility model;

[0028] Figure 2 It is a longitudinal sectional view of the backflush pipe of an integrated treatment device combining MABR-MBBR-MBR of the present utility model;

[0029] Figure 3 The structural diagram of the flow guide plate of an integrated treatment device combining MABR-MBBR-MBR of the present utility model;

[0030] Figure 4 The structural schematic diagram of the backwashing pipe of an integrated treatment device combining MABR-MBBR-MBR of the present utility model;

[0031] Figure 5 The process flow diagram of an integrated treatment device combining MABR-MBBR-MBR of the present utility model.

[0032] Explanation of the reference signs in the drawings:

[0033] 1. MABR membrane aerated biological reactor, 2. MABR tank, 3. MABR membrane module, 5. MBBR moving bed biofilm reactor, 5-1. MBBR tank, 5-2. Activated sludge carrier filler, 5-3. Aeration component, 5-4. Second baffle plate, 6. MBR membrane biological reactor, 6-1. MBR membrane tank, 7. MBR membrane module, 8. Disinfection tank, 9. MBR backwashing water pump, 10. MBR water production pump, 11. Air supply mechanism, 12. Grid plate, 13. Backwashing pipe, 14. Flow guide plate, 15. Sustained-release disinfector. Detailed implementation manners

[0034] The following combines the attached Figures 1 to 5 , and describes the detailed implementation manners of the present utility model in detail. However, it should be understood that the protection scope of the present utility model is not limited by the detailed implementation manners. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] The inventor found that although the activated sludge process can remove organic matter, nitrogen, and phosphorus in domestic sewage to a certain extent, when using the activated sludge process to treat domestic sewage, a large amount of land is usually required for the construction of sewage treatment facilities and a large amount of energy is consumed.

[0036] In order to solve the problems existing in the above-mentioned prior art, the present utility model provides an integrated treatment device combining MABR-MBBR-MBR.

[0037] Referring to the attached Figure 1 ~the attached Figure 5 shown, in which an integrated treatment device combining MABR-MBBR-MBR in an embodiment includes:

[0038] The MABR membrane aeration bioreactor 1 is connected to the regulating tank lift pump through a pipeline, so that the wastewater fed into the MABR membrane aeration bioreactor 1 undergoes simultaneous nitrification and denitrification reactions, strengthening the removal of organic matter, nitrogen and phosphorus;

[0039] The MBBR moving bed biofilm reactor 5 is connected to the MABR membrane aeration bioreactor 1 and is used to carry out nitrification and denitrification reactions on the wastewater fed into the MBBR moving bed biofilm reactor 5 to further reduce the content of organic matter, nitrogen and phosphorus pollutants in the wastewater. The MBBR moving bed biofilm reactor 5 includes an MBBR tank 5-1 and a baffle plate 14. The baffle plate 14 is inclined, and the high end of the baffle plate 14 is connected to the side wall of the MBBR tank 5-1, and the low end of the baffle plate 14 is connected to the bottom wall of the MBBR tank 5-1;

[0040] The MBR membrane bioreactor 6 is connected to the MBBR moving bed biofilm reactor 5 and is used to intercept suspended solids and impurities in the wastewater fed into the MBR membrane bioreactor 5 and further remove phosphorus in the wastewater fed into the MBR membrane bioreactor 6;

[0041] The MABR membrane aeration bioreactor 1, the MBBR moving bed biofilm reactor 5 and the MBR membrane bioreactor 6 are all connected to the air supply mechanism 11.

[0042] Specifically, the MABR membrane aeration bioreactor 1 includes an MABR tank 2 and at least one MABR membrane module 3. The MABR membrane module 3 is arranged in the MABR tank 2, and the MABR membrane module 3 is connected to the air supply mechanism 11. A first weir is provided on the MABR tank 2, and the first weir is connected to the regulating tank lift pump through a pipeline. A bent pipe is also provided on the MABR tank 2.

[0043] Specifically, a first baffle plate is arranged longitudinally in the MABR tank 2. The top end of the first baffle plate is fixed to the top of the MABR tank 2, and there is a gap between the bottom end of the first baffle plate and the bottom wall of the MABR tank 2. The first baffle plate divides the MABR tank 2 into a first transition zone and a first reaction zone. The first weir is located in the first transition zone, and the MABR membrane module 3 is arranged in the first reaction zone.

[0044] Specifically, the MBBR moving bed biofilm reactor 5 includes an MBBR tank 5-1, a plurality of activated sludge carrier fillers 5-2 and an aeration assembly 5-3. A second weir is provided on the MBBR tank 5-1, and the second weir is connected to the MABR tank 2 through a bent pipe. The aeration assembly 5-3 is arranged on the inner bottom wall of the MBBR tank 5-1, and the aeration assembly 5-3 is connected to the air supply mechanism 11. A plurality of activated sludge carrier fillers 5-2 are filled in the MBBR tank 5-1, and a drain pipe is provided on the MBBR tank 5-1.

[0045] Specifically, a second baffle 5-4 is longitudinally arranged in the MBBR tank 5-1. The top end of the second baffle 5-4 is fixed to the top of the MBBR tank 5-1, and there is a gap between the bottom end of the second baffle 5-4 and the bottom wall of the MBBR tank 5-1. The second baffle 5-4 divides the MBBR tank 5-1 into a second transition zone and a second reaction zone. The second effluent weir is located in the second transition zone, and a plurality of activated sludge carrier fillers 5-2 and aeration assemblies 5-3 are arranged in the second reaction zone.

[0046] Specifically, the aeration assembly 5-3 includes a horizontal air pipe and a plurality of aeration heads. The horizontal air pipe is arranged on the bottom wall in the second reaction zone. The water outlet directions of the plurality of aeration heads are perpendicular to the axial direction of the horizontal air pipe, and the plurality of aeration heads are communicated with the horizontal air pipe. The horizontal air pipe is communicated with the air supply mechanism 11. The high end of the inclined deflector 14 is connected to the side wall of the second reaction zone, and the low end of the deflector 14 is connected to the bottom wall of the second reaction zone. A grille plate 12 is arranged on the side wall of the second reaction zone close to the drain pipe. A backwashing pipe 13 is arranged on the back of the grille plate 12, and the backwashing pipe 13 is communicated with the air supply mechanism 11.

[0047] The MBBR moving bed biofilm reactor 5 combines the advantages of both traditional fluidized beds and biological contact oxidation processes. By adding a certain number of suspended carriers into the second reaction zone, the biomass and biological species in the second reaction zone are increased, thereby improving the treatment efficiency of the MBBR moving bed biofilm reactor 4. The densities of the plurality of activated sludge carrier fillers 5-2 are close to that of water. Relying on the aeration in the second reaction zone and the lifting action of the water flow, the carriers are in a fluidized state, and then a suspended-growth activated sludge and an attached-growth biofilm are formed. Anaerobic bacteria or facultative anaerobic bacteria grow on the inner biofilm, and aerobic bacteria are on the outside, enabling nitrification and denitrification reactions to exist simultaneously and enhancing the treatment effect.

[0048] During the operation of the MBBR moving bed biofilm reactor 5, in order to prevent the loss of fillers and considering the filler size, a grille with a smaller aperture is generally arranged at the water outlet end of the MBBR moving bed biofilm reactor 5. However, this setting easily causes the accumulation of suspended sludge and fillers at the grille, resulting in a reduction in water flow and blockage. At this time, the grille generally needs to be manually cleaned, which causes inconvenience to the work of the operation and maintenance personnel. To solve this problem and considering cost reduction, a set of perforated pipes can be added on the water outlet side of the grille (as shown in Figure 2 shown), and the grille is backwashed regularly to prevent the blockage of sludge and fillers.

[0049] In addition, during operation, if the fillers in the MBBR moving bed biofilm reactor 5 cannot be guaranteed to be in a uniform flow state, it is easy to have dead flow areas and cause the phenomenon of filler accumulation. The key to solving this problem is to optimize the MBBR tank 5-1 and improve the aeration arrangement in the MBBR tank 5-1. The installation of the aeration device in the MBBR tank 5-1 generally has a certain distance from the surrounding pool walls, and it is easy to generate filler accumulation here. The present utility model considers changing the hydraulic characteristics in the MBBR tank 5-1 by changing the MBBR tank 5-1. A flow guide plate 14 (see Figure 1 ) is provided at one side wall and the bottom wall of the second reaction zone in the MBBR. The flow guide plate 14 seals one side wall and the bottom wall of the second reaction zone along both sides in the length direction. The inclined surface design prevents the fillers from staying at the bottom gaps of the pool, thus forcing cyclic movement and avoiding the accumulation of fillers in the corners of the MBBR tank 5-1.

[0050] Specifically, as shown in Figure 3 and Figure 4 , the air outlet end of the backwashing pipe 13 is sealed, and two rows of air outlets are opened on the side wall of the air outlet end. The air outlet directions of the two rows of air outlets form a 45° angle with the back plane of the grille plate 12. The two rows of air outlets are arranged in a parallel staggered manner on the backwashing pipe 13, and any three adjacent air outlets in the two rows of air outlets can form an isosceles right triangle structure. The aperture of each air outlet is 3-5 mm, and preferably 4 mm. Such a design will result in a larger purging area and better purging effect.

[0051] Specifically, the MBR membrane bioreactor 6 includes an MBR membrane module 7 and an MBR membrane tank 6-1. The MBR membrane module 7 is arranged in the MBR membrane tank 6-1, and the MBR membrane module 7 is connected to the air supply mechanism 11 through pipelines. The MBR membrane tank 6-1 is connected to the MBBR tank 5-1 through a drain pipe.

[0052] Specifically, a disinfection tank 8 is further provided outside the MBR membrane tank 6-1. The disinfection tank 8 is connected to the MBR membrane tank 6-1 through an MBR product water pump 10 and a first pipeline. The water outlet of the MBR product water pump 10 passes through a second pipeline and a third pipeline. The second pipeline is connected with a slow-release disinfector 15. The slow-release disinfector 15 is connected to the disinfection tank 8 through a fourth pipeline. The third pipeline is also connected to the fourth pipeline. Valves are provided on the second pipeline, the third pipeline, and the fourth pipeline.

[0053] Specifically, an MBR backwashing water pump 9 is provided outside the MBR membrane tank 6-1. The MBR backwashing water pump 9 is connected to the MBR membrane module 7 through pipelines. Valves are provided on the pipelines connecting all the MBBR moving bed biofilm reactors 5 and the MBR membrane bioreactors 6 to the air supply mechanism 11 respectively.

[0054] Process principle:

[0055] The sewage is lifted by the regulating tank and pumped to the integrated device MABR unit, where a membrane assembly is installed. MABR can achieve bubble-free and efficient transmission of oxygen molecules, and the utilization rate of oxygen is very high. The biofilm attached to the MABR membrane assembly can form three environments: aerobic, anaerobic, and anoxic, allowing nitrifying bacteria and denitrifying bacteria to coexist, thereby achieving efficient simultaneous nitrification and denitrification, and significantly removing organic matter and ammonia nitrogen from sewage. At the same time, the water environment of the MABR pool is in an anoxic state, and the denitrifying bacteria in the pool can be used to convert the undecomposed carbon-containing organic matter in the sewage into a carbon source, and reduce nitrate to N 2 The release and removal of total nitrogen can reduce or directly eliminate internal recirculation based on the above characteristics of MABR.

[0056] The MABR effluent flows into the MBBR pool by gravity. The MBBR filler forms a flowing biofilm through frequent contact with water, and anaerobic bacteria, facultative aerobic bacteria and aerobic bacteria exist at the same time. This further promotes the simultaneous digestion reaction and denitrification reaction, and the content of pollutants such as ammonia nitrogen, total nitrogen and organic matter in the effluent is significantly lower than that of conventional aerobic pools.

[0057] MBBR effluent enters the MBR pool, and the colloids, biofilm impurities, suspended solids, etc. in the sewage are intercepted by membrane filtration. At the same time, the biological phosphorus removal is further enhanced through the aerobic environment, the phosphorus content in the sewage is reduced, and the system phosphorus removal is achieved through membrane separation and discharge of residual sludge. The effluent from the MBR pool enters the disinfection pool, and is reused or discharged after chlorination disinfection by the slow-release disinfector. The disinfection uses solid chlorine as the main raw material, and the disinfectant produced by the reasonable mixing of water and the agent is added to the disinfection pool for sterilization and disinfection. Compared with the method of adding liquid disinfectants or ultraviolet disinfection, the slow-release disinfector reduces the construction cost and operating cost without weakening the disinfection effect. At the same time, when adding drugs to the slow-release disinfector, no pump is required, and the dosing is simple and energy-saving. This system is suitable for the treatment of municipal and industrial sewage.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A MABR-MBBR-MBR combined integrated treatment device, characterized in that: include: The MABR membrane aerated bioreactor (1) is connected to the lifting pump of the regulating tank through a pipeline; An MBBR moving bed biofilm reactor (5) is connected to the MABR membrane aeration bioreactor (1), wherein the MBBR moving bed biofilm reactor (5) comprises an MBBR tank (5-1) and a guide plate (14), wherein the guide plate (14) is arranged obliquely, and the upper end of the guide plate (14) is connected to the side wall of the MBBR tank (5-1), and the lower end of the guide plate (14) is connected to the bottom wall of the MBBR tank (5-1); An MBR membrane bioreactor (6) is connected to the MBBR moving bed biofilm reactor (5); The MABR membrane aerated bioreactor (1), the MBBR moving bed biofilm reactor (5) and the MBR membrane bioreactor (6) are all connected to the gas supply mechanism (11).

2. A MABR-MBBR-MBR combined integrated treatment device according to claim 1, characterized in that: The MABR membrane aerated bioreactor (1) comprises a MABR tank (2) and at least one MABR membrane assembly (3), wherein the MABR membrane assembly (3) is arranged in the MABR tank (2), and the MABR membrane assembly (3) is connected to an air supply mechanism (11), a first water outlet weir is arranged on the MABR tank (2), and the first water outlet weir is connected to a regulating tank lifting pump through a pipeline, and a bend pipe is also arranged on the MABR tank (2).

3. A MABR-MBBR-MBR combined integrated treatment device according to claim 2, characterized in that: A first baffle is provided in the MABR tank (2) along the longitudinal direction, the top of the first baffle is fixed to the top of the MABR tank (2), a gap exists between the bottom of the first baffle and the bottom wall of the MABR tank (2), the first baffle divides the MABR tank (2) into a first transition zone and a first reaction zone, the first outlet weir is located in the first transition zone, and the MABR membrane assembly (3) is arranged in the first reaction zone.

4. A MABR-MBBR-MBR combined integrated treatment device according to claim 1, characterized in that: The MBBR moving bed biofilm reactor (5) comprises an MBBR tank (5-1), a plurality of activated sludge carrier fillers (5-2) and an aeration assembly (5-3); the MBBR tank (5-1) is provided with a second outlet weir, the second outlet weir is connected to the MBBR tank (2) through a bend pipe, the aeration assembly (5-3) is arranged on the bottom wall of the MBBR tank (5-1), and the aeration assembly (5-3) is connected to an air supply mechanism (11); a plurality of activated sludge carrier fillers (5-2) are filled in the MBBR tank (5-1), and the MBBR tank (5-1) is provided with a drainage pipe.

5. A MABR-MBBR-MBR combined integrated treatment device according to claim 4, characterized in that: A second baffle (5-4) is longitudinally arranged in the MBBR tank (5-1), the top end of the second baffle (5-4) is fixed on the top of the MBBR tank (5-1), a gap exists between the bottom end of the second baffle (5-4) and the bottom wall of the MBBR tank (5-1), the second baffle (5-4) divides the MBBR tank (5-1) into a second transition zone and a second reaction zone, the second effluent weir is located in the second transition zone, and a plurality of activated sludge carrier fillers (5-2) and aeration components (5-3) are arranged in the second reaction zone.

6. A MABR-MBBR-MBR combined integrated treatment device according to claim 5, characterized in that: The aeration assembly (5-3) comprises a horizontal air pipe and a plurality of aeration heads, wherein the horizontal air pipe is arranged on the bottom wall of the second reaction zone, the water outlet direction of the plurality of aeration heads is perpendicular to the axial direction of the horizontal air pipe, and the plurality of aeration heads are connected to the horizontal air pipe, the horizontal air pipe is connected to an air supply mechanism (11), the high end of an inclined guide plate (14) is connected to the side wall of the second reaction zone, and the low end of the guide plate (14) is connected to the bottom wall of the second reaction zone, a grid plate (12) is arranged on the side wall of the second reaction zone close to the drain pipe, a back blow pipe (13) is arranged on the back of the grid plate (12), and the back blow pipe (13) is connected to the air supply mechanism (11).

7. A MABR-MBBR-MBR combined integrated treatment device according to claim 6, characterized in that: The air outlet end of the back-blowing pipe (13) is sealed, and two rows of air outlets are provided on the side wall of the air outlet end. The air outlet directions of the two rows of air outlets are at an angle of 45° to the back plate of the grid plate (12). The two rows of air outlets are arranged in parallel and staggered on the back-blowing pipe (13), and any three adjacent air outlets in the two rows of air outlets can form an isosceles right triangle structure.

8. The MABR-MBBR-MBR combined integrated treatment device according to claim 1, characterized in that: The MBR membrane bioreactor (6) comprises an MBR membrane assembly (7) and an MBR membrane pool (6-1), wherein the MBR membrane assembly (7) is arranged in the MBR membrane pool (6-1), and the MBR membrane assembly (7) is connected to the air supply mechanism (11) via a pipeline, and the MBR membrane pool (6-1) is connected to the MBBR pool (5-1) via a drainage pipe.

9. A MABR-MBBR-MBR combined integrated treatment device according to claim 8, characterized in that: A disinfection pool (8) is also provided outside the MBR membrane pool (6-1). The disinfection pool (8) is connected to the MBR membrane pool (6-1) via an MBR water production pump (10) and a first pipeline. The water outlet of the MBR water production pump (10) is connected via a second pipeline and a third pipeline. The second pipeline is connected to a slow-release disinfector (15). The slow-release disinfector (15) is connected to the disinfection pool (8) via a fourth pipeline. The third pipeline is also connected to the fourth pipeline. Valves are provided on the second pipeline, the third pipeline and the fourth pipeline.

10. A MABR-MBBR-MBR combined integrated treatment device according to claim 8, characterized in that: An MBR backwash water pump (9) is provided outside the MBR membrane pool (6-1), and the MBR backwash water pump (9) is connected to the MBR membrane assembly (7) through a pipeline. Valves are provided on the pipelines connecting all MBBR moving bed biofilm reactors (5) and MBR membrane bioreactors (6) to the gas supply mechanism (11).

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