Aerated Biofilm Reactor

Abstract

The utility model discloses an aerated biofilm reactor, including an MBBR membrane culture mobile station and an MABR membrane culture mobile station. The water inlet of the MBBR membrane culture mobile station is connected to a submersible pump, the drain outlet of the MBBR membrane culture mobile station is connected to the water inlet of the MABR membrane culture mobile station through a balance pipe, the water suction port of the MABR membrane culture mobile station is connected to a water pump through a water suction pipe, and the water pump is connected to a clean water outlet pipe. This design is an integrated combination of the MBBR membrane culture mobile station and the MABR membrane culture mobile station, which organically combines the two to form an integrated moving bed membrane bioreactor. It has a highly dense bacterial community and diverse functional microorganisms; high oxygen utilization rate to ensure oxygen supply for microbial growth; low sludge production; and for the water quality characteristics of high ammonia nitrogen sewage, the effluent water quality is relatively stable, and sewage resource treatment can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection, in particular to sewage treatment equipment. Background Art

[0002] In recent years, with the rapid development of my country's economy, the amount of sewage discharged in industrial and agricultural production processes has also increased. The nitrogen content in sewage has increased significantly, leading to eutrophication of large areas of surface water and causing serious ecological and environmental disasters.

[0003] The biofilm method is one of the commonly used water treatment technologies in the field of biochemical sewage treatment in my country at this stage. In recent years, my country has increasingly stringent requirements on the quality of sewage treatment effluent. The traditional biofilm method for treating nitrogen-containing sewage is relatively mature in terms of technology and process flow, but the infrastructure and operating costs are generally high, the sludge output is large, the energy consumption is high, and the denitrification effect is difficult to further improve.

[0004] MBBR membrane culture mobile station, the MBBR reaction area is the growth and reproduction area of ​​anaerobic microorganisms, mainly to improve denitrification.

[0005] MABR membrane culture mobile station is a new type of sewage treatment technology that couples the traditional biofilm method with oxygen permeable membrane technology. It uses microporous or dense hydrophobic oxygen permeable hollow fiber membranes to supply oxygen to the biofilm attached to the hollow fiber membrane. The membrane material mainly provides carriers and oxygen for the biofilm. Driven by concentration difference, adsorption, etc., oxygen and organic matter enter the biofilm from both sides of the biofilm, which is called heterogeneous mass transfer. When the aeration operating pressure is lower than the bubble point pressure, tiny bubbles are formed, which is called bubbleless aeration. Due to heterogeneous mass transfer and bubbleless aeration, the biofilm attached to the outer surface of the hollow fiber membrane forms a unique biofilm active layered structure from the side close to the membrane filament to the side in contact with sewage. It is divided into three layers, namely aerobic layer, facultative anoxic layer and anaerobic layer. The above are the unique technical advantages of MABR technology, which enable MABR technology to have the ability of simultaneous nitrification and denitrification, and effectively achieve denitrification and carbon removal.

[0006] The moving bed biofilm reactor is a new and efficient sewage treatment process that couples the activated sludge process and biofilm technology. The suspended filler is added to the biofilm reactor as a carrier of the biofilm. The density of the suspended material is close to that of water and it is in frequent contact with the sewage. Microorganisms gradually grow on the surface of the suspended filler to form a biofilm. The organic matter in the sewage is degraded and removed by the microorganisms in the biofilm through metabolism. In recent years, the nitrogen content in surface sewage has increased significantly, especially high ammonia nitrogen organic wastewater. It is difficult to achieve effective denitrification and carbon removal using conventional sewage treatment processes. Utility Model Content

[0007] The technical problems solved by the utility model are as follows: the traditional biofilm method has high capital construction cost and operation cost, large sludge output, large energy consumption, and it is difficult to further improve the denitrification effect.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions: an aerated biofilm reactor, including an MBBR membrane culture mobile station and an MABR membrane culture mobile station, the water inlet of the MBBR membrane culture mobile station is connected with a submersible pump, the drain outlet of the MBBR membrane culture mobile station is connected with the water inlet of the MABR membrane culture mobile station through a balancing pipe, the water suction port of the MABR membrane culture mobile station is connected with a water pump through a water suction pipe, and the water pump is connected to a clean water outlet pipe.

[0009] The aerated biofilm reactor of the utility model is an integrated combination of the MBBR membrane culture mobile station and the MABR membrane culture mobile station, which organically combines the two to form an integrated moving bed membrane bioreactor. Compared with the separate MBBR and MABR processes, this combined process further reduces the amount of residual sludge generated, improves the denitrification effect, reduces membrane pollution, and further improves the ability to resist shock loads. Since microorganisms attach and grow on the surface of the filler to form a biofilm, aeration puts it in a fluidized state, ensuring good mass transfer conditions, thereby achieving efficient removal of pollutants. On the other hand, the complete interception effect of the MABR membrane assembly completely separates the sludge retention time of the MABR from the hydraulic retention time, while maintaining a very high sludge concentration in the reactor, allowing a large number of nitrifying bacteria to accumulate in the reactor, which is beneficial to the removal of NH4+-N.

[0010] The MBBR reaction zone in the aerated biofilm reactor is the growth and reproduction area of ​​anaerobic microorganisms, mainly to improve denitrification. The hollow fiber membrane components in the MABR reaction zone are through-type, and the organic matter in the sewage is adsorbed and degraded by the MABR biofilm, and simultaneous nitrification and denitrification are carried out. When the sewage contains a small amount of organic matter with biological inhibition, the anaerobic layer of the MABR biofilm directly contacts the sewage, resulting in a large inhibition of the anaerobic layer microorganisms by the organic matter, and the denitrification performance is bound to be greatly reduced. The MBBR biofilm can make up for this defect and effectively improve the denitrification capacity.

[0011] The submersible pump is located in the grille frame.

[0012] The submersible pump is connected to the filter barrel through a connecting pipe, and the filter barrel is connected to the water inlet of the MBBR membrane culture mobile station through a water inlet pipe.

[0013] A butterfly valve and a flow meter are provided on the water inlet pipe.

[0014] The sewage outlet of the MBBR membrane culture mobile station and the sewage outlet of the MABR membrane culture mobile station are connected to the sewage pipe.

[0015] The overflow hole of the MABR membrane culture mobile station is connected to an overflow pipe.

[0016] Aerated biofilm reactor process flow. Sewage passes through the grille frame, and is pumped into the filter barrel by a submersible pump and a connecting pipe for filtration. It then passes through a butterfly valve and a flow meter and enters the MBBR membrane culture mobile station water pool. After a period of stay, the water with microorganisms enters the MABR membrane culture mobile station through a balance pipe. In the MABR membrane culture mobile station water pool, under the action of the pumping force, water passes through the MABR membrane frame and is sucked into the sealed culture chamber, and then is pumped out to the clean water outlet pipe through the pumping port, the pumping pipe, and the pumping pump.

[0017] The utility model has the following characteristics. First, it has a highly dense bacterial flora and diverse functional microorganisms. Second, it has a high oxygen utilization rate and a low oxygen supply aeration pressure, which ensures the growth of microorganisms while avoiding excessive aeration that causes excessive dissolved oxygen in sewage. Third, sludge is easy to adhere to and produces less sludge, saving sludge treatment costs. Fourth, for the water quality characteristics of sewage containing high ammonia nitrogen, a stable treatment process is adopted, the effluent water quality is relatively stable, and sewage resource treatment can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] Figure 1 is a schematic diagram of an aerated biofilm reactor;

[0020] Figure 2 A schematic diagram of an aerated biofilm reactor from another perspective;

[0021] Figure 3 This is a half-section view of the MBBR membrane culture mobile station;

[0022] Figure 4 This is a half-section view of the MABR membrane culture mobile station.

[0023] Explanation of symbols in the figure:

[0024] 10. MBBR membrane culture mobile station;

[0025] 11. A first device protective cover; 114. A first device base;

[0026] 12. Microbial biochemical pool; 121. Hydrophilic biological filler; 122. First water inlet; 123. Drainage outlet; 124. First sewage outlet;

[0027] 13. first aeration plate; 131. first aerator; 132. first aeration pipe;

[0028] 14. Screw rod; 141. Upper film pressing screen plate; 142. Lower film pressing screen plate; 143. Screw rod positioning seat; 144. Screw rod nut; 145. Speed ​​reducer unit;

[0029] 20. MABR membrane culture mobile station;

[0030] 21. MABR membrane reaction tank; 211. second water inlet; 212. overflow hole; 213. second sewage outlet;

[0031] 22. MABR membrane group; 221. end membrane box; 222. middle membrane box; 223. membrane frame;

[0032] 23. second aeration plate; 231. second aerator; 232. second aeration pipe;

[0033] 24. Bacteria culture room; 241. Water inlet; 242. Nano anaerobic brick; 243. Nano bacteria rack; 244. Water inlet of bacteria room;

[0034] 25. Second device base; 251. Second device protective cover;

[0035] 30. Submersible pump; 31. Grille frame; 32. Connecting pipe; 33. Filter barrel; 34. Water inlet pipe; 35. Butterfly valve; 36. Flow meter;

[0036] 40. Balance pipe; 41. DN60 live-joint ball valve;

[0037] 50. Suction pipe; 51. Suction pump; 52. Clean water outlet pipe; 53. DN40 loose ball valve;

[0038] 60. Sewage pipe;

[0039] 70. Overflow pipe. DETAILED DESCRIPTION

[0040] Combination Figure 1 , Figure 2 The aerated biofilm reactor includes an MBBR membrane culture mobile station 10 and a MABR membrane culture mobile station 20. The water inlet of the MBBR membrane culture mobile station is connected to a submersible pump 30. The drain outlet of the MBBR membrane culture mobile station is connected to the water inlet of the MABR membrane culture mobile station through a balance pipe 40. The water suction port of the MABR membrane culture mobile station is connected to a water pump 51 through a water suction pipe 50. The water pump is connected to a clean water outlet pipe 52.

[0041] The submersible pump 30 is located in the grille frame 31. The submersible pump 30 is connected to the filter barrel 33 through a connecting pipe 32, and the filter barrel is connected to the water inlet of the MBBR membrane culture mobile station 10 through a water inlet pipe 34. A butterfly valve 35 and a flow meter 36 are provided on the water inlet pipe 34.

[0042] like Figure 3 The MBBR membrane culture mobile station 10 includes a microbial biochemical pool 12 located in a first equipment protective cover, a hydrophilic biological filler 121 located in the microbial biochemical pool and a first aeration plate 13. An upper membrane pressure mesh plate 141 and a lower membrane pressure mesh plate 142 are provided in the microbial biochemical pool. The hydrophilic biological filler is located between the upper membrane pressure mesh plate and the lower membrane pressure mesh plate. The upper membrane pressure mesh plate is connected to a screw mechanism.

[0043] In the MBBR membrane culture mobile station 10 , the first aerator 131 connected to the first aeration plate 13 is located in the first equipment protection cover and above the microbial biochemical pool 12 . The first aeration plate is located at the bottom of the microbial biochemical pool and is connected to the first aerator 131 through the first aeration pipe 132 .

[0044] In the MBBR membrane culture mobile station 10, the bottom end of the screw 14 of the screw mechanism is pivoted on the screw positioning seat 143, and a screw nut 144 is screwed on the screw, and the screw nut is connected to the upper film pressing mesh plate 141, and the top of the screw is connected to the speed reducer 145, and the speed reducer is located above the microbial biochemical pool 12. Driven by the speed reducer 145, the screw 14 rotates, driving the screw nut 144 to rise and fall along the guide structure (such as a guide rod, a guide groove), and the screw nut 144 drives the upper film pressing mesh plate 141 to rise and fall relative to the lower film pressing mesh plate 142.

[0045] In the MBBR membrane culture mobile station 10, a first water inlet 122 is provided on the side wall of the microbial biochemical pool 12, a first drain outlet 123 is provided on the back of the microbial biochemical pool, and a sewage outlet 124 is provided on the bottom of the microbial biochemical pool.

[0046] MBBR membrane culture mobile station 10 process flow. Inject raw water into the microbial biochemical pool 12 through the first water inlet 122, the first aerator 131 starts working, and aeration is transported to the first aeration plate 13 at the bottom of the microbial biochemical pool through the first aeration pipe 132. Add a certain amount of hydrophilic biological filler 121 into the microbial biochemical pool, so that a large number of microorganisms are attached to the suspended hydrophilic biological filler, thereby forming a biofilm. When the sewage flows through, the organic matter in the sewage is taken up by the microorganisms on the biofilm as nutrients, and the microorganisms themselves grow and reproduce while purifying the sewage, thereby increasing the biomass and biological species in the microbial biochemical pool, thereby improving the sewage treatment efficiency of the microbial biochemical pool. The purified water with biological species is discharged from the first drain outlet 123 to the next reaction pool.

[0047] like Figure 4The MABR membrane culture mobile station 20 includes a MABR membrane reaction tank 21, a MABR membrane group 22 and a second aeration plate 23 arranged in the MABR membrane reaction tank, the MABR membrane group is connected to the membrane box, the membrane box is connected to the culture chamber 24, the culture chamber is connected to a water pumping port 241, the MABR membrane reaction tank is installed on a second equipment base 25, a second equipment protective cover 251 is installed on the second equipment base, the second equipment protective cover covers the MABR membrane reaction tank and the culture chamber, and the culture chamber is located above the MABR membrane reaction tank; a second water inlet 211 and an overflow hole 212 are provided on the side wall of the MABR membrane reaction tank, and a second sewage outlet 213 is provided at the bottom of the MABR membrane reaction tank.

[0048] In the MABR membrane culture mobile station 20, the membrane box includes an end membrane box 221 and an intermediate membrane box 222, which are mounted on a membrane frame 223, between which the MABR membrane group 22 is arranged, and the membrane frame is provided with a water flow channel connecting the end membrane box and the intermediate membrane box, and the water flow channel is connected to the culture chamber 24. Nano anaerobic bricks 242 are arranged in the culture chamber 24.

[0049] In the MABR membrane culture mobile station 20 , the second aerator 231 connected to the second aeration disk 23 is arranged above the culture chamber 24 and located in the second equipment protection cover 251 .

[0050] In the MABR membrane culture mobile station 20 , a plurality of second aeration plates 23 are distributed at the bottom of the MABR membrane reaction tank 21 , and the second aeration plates are connected to the second aerator 231 through the second aeration pipe 232 .

[0051] Process flow of MABR membrane bacterial culture mobile station 20. The water treated by the front-stage station is injected into the MBAR membrane reaction tank 21 through the second water inlet 211, and the second aerator 231 starts to work. Aeration is supplied to the second aeration plate 23 at the bottom through the second aeration pipe 232, and the MABR membrane reaction tank achieves the purpose of oxygenation. The mixed aqueous solution, under the action of the suction force of the water pumping port 241, passes through the capillary pores of the MABR membrane group 22 and is pumped into the inner pores of the MABR membrane group, thereby improving the solid-liquid separation efficiency. The separated aqueous solution is pumped into the end membrane box 221 and the middle membrane box 222 from the inner cavity of the MABR membrane group 22, and then pumped into the sealed bacterial culture chamber 24 through the membrane frame 223. The nano anaerobic bricks 242 in the nano bacteria frame 243 decompose with the aqueous solution.

[0052] refer to Figure 1 , Figure 2 The first sewage outlet of the MBBR membrane culture mobile station 10 and the second sewage outlet of the MABR membrane culture mobile station 20 are connected to the sewage pipe 60. The overflow hole of the MABR membrane culture mobile station 20 is connected to an overflow pipe 70.

[0053] The process flow of the aerated biofilm reactor of the utility model. The sewage passes through the grille frame 31, and is pumped into the filter barrel 33 by the submersible pump 30 and the connecting pipe 32 for filtration, and enters the MBBR membrane culture mobile station 10 water pool through the butterfly valve 35 and the flow meter 36. After staying, the water with microorganisms enters the MABR culture station 20 through the DN60 live ball valve 41 and the balance pipe 40. In the MABR membrane culture mobile station 20 water pool, under the action of the suction force of the pump 51, the water passes through the MABR membrane frame and is sucked into the sealed culture chamber 24, and then passes through the DN40 live ball valve 53, and the pump 51 is pumped out to the clean water outlet pipe 52.

[0054] The above contents are only preferred implementation modes of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation mode and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. An aerated biofilm reactor, comprising an MBBR membrane culture mobile station (10) and a MABR membrane culture mobile station (20), characterized in that: The water inlet of the MBBR membrane bacteria culture mobile station is connected to the submersible pump (30), the outlet of the MBBR membrane bacteria culture mobile station is connected to the water inlet of the MABR membrane bacteria culture mobile station through a balance pipe (40), the water suction port of the MABR membrane bacteria culture mobile station is connected to a water pump (51) through a water suction pipe (50), and the water pump is connected to a clean water outlet pipe (52).

2. The aerated biofilm reactor according to claim 1, characterized in that: The submersible pump (30) is located in the grille frame (31).

3. The aerated biofilm reactor according to claim 1, characterized in that: The submersible pump (30) is connected to the filter barrel (33) via a connecting pipe (32), and the filter barrel is connected to the water inlet of the MBBR membrane culture mobile station (10) via a water inlet pipe (34).

4. The aerated biofilm reactor according to claim 3, characterized in that: A butterfly valve (35) and a flow meter (36) are provided on the water inlet pipe (34).

5. The aerated biofilm reactor according to claim 1, characterized in that: The sewage outlet of the MBBR membrane bacteria culture mobile station (10) and the sewage outlet of the MABR membrane bacteria culture mobile station (20) are connected to the sewage pipe (60).

6. The aerated biofilm reactor according to claim 1, characterized in that: The overflow hole of the MABR membrane culture mobile station (20) is connected to an overflow pipe (70).

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