ABFT sewage treatment device

Abstract

The utility model discloses an ABFT sewage treatment device and relates to the technical field of sewage treatment. The device comprises a first ABFT pool, a second ABFT pool, a third ABFT pool, a fourth ABFT pool and a sedimentation pool which are sequentially arranged from left to right, the four ABFT pools are completely the same in size and structure, bottom communicating holes are formed between the first ABFT pool and the second ABFT pool and between the third ABFT pool and the fourth ABFT pool, top communicating holes are formed between the second ABFT pool and the third ABFT pool, and the bottom communicating holes are communicated with the top communicating holes. A communicating pipe is arranged between the fourth ABFT tank and the sedimentation tank; the ABFT complete set of integrated equipment is provided for small-scale and small-water-volume treatment facilities, a container type equipment structure is used, the civil construction period and high cost are avoided, the project automation degree is improved, and the project operation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically, to an ABFT sewage treatment device. Background Art

[0002] ABFT (Aeration biological fluidized tank) process is a new wastewater treatment technology for removing ammonia nitrogen by biochemical method in recent years. This process combines medium fluidization, adsorption and biochemical processes. Its operation mechanism is relatively complex, but its operation management is convenient and the operation is simple. In particular, it combines physical and chemical methods with biological methods, and takes into account the advantages of activated sludge method, biofilm method and immobilized microbial technology. Therefore, it has been increasingly valued by the water treatment industry.

[0003] Traditional ABFT sewage treatment is generally implemented for large-scale and large-volume sewage treatment. However, when faced with small-scale and small-discharge sewage treatment problems, there will be problems such as long civil construction period and high cost, and low overall degree of automation. Utility Model Content

[0004] In order to overcome the above technical deficiencies, the utility model launches an ABFT sewage treatment device for small-scale, small water volume treatment facilities, which has the advantages of short civil construction period and low cost, and high degree of automation.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an ABFT sewage treatment device, comprising a first ABFT tank, a second ABFT tank, a third ABFT tank, a fourth ABFT tank and a sedimentation tank arranged from left to right. The sizes and structures of the four ABFT tanks are exactly the same. Bottom connecting holes are provided between the first ABFT tank and the second ABFT tank and between the third ABFT tank and the fourth ABFT tank. A top connecting hole is provided between the second ABFT tank and the third ABFT tank. A connecting pipe is provided between the fourth ABFT tank and the sedimentation tank.

[0006] The utility model launches a complete set of ABFT integrated equipment for small-scale and small water volume treatment facilities. It uses a practical container-type equipment structure to avoid civil construction period and high costs, improve the project automation level, and reduce project operating costs.

[0007] Preferably, an aeration tube group is provided in the ABFT tank, the aeration tube group comprising a plurality of groups of vertically arranged first aeration tubes, two groups of horizontal aeration tubes connected to both ends of the first aeration tubes, and a third aeration tube vertically connected to the connection between the first aeration tube and the second aeration tube. The connection structure of the aeration tube is further defined.

[0008] Preferably, a plurality of first aeration tube fixing brackets are provided between the first aeration tube and the bottom of the ABFT tank, and the first aeration tube fixing brackets are fixedly connected to the first aeration tube; a plurality of second aeration tube fixing brackets are provided on the side wall of the ABFT tank, and the second aeration tube fixing brackets are fixedly connected to the third aeration tube, further defining the fixing structure of the aeration tube.

[0009] Preferably, two groups of grid plates arranged up and down are provided in the ABFT tank, which further defines the tank structure of the ABFT device.

[0010] Preferably, a group of filler fixing brackets are provided on the lower side of each group of grid plates, which further defines the tank structure of the ABFT device.

[0011] Preferably, a guide tube is provided on the upper side of the sedimentation tank, a water outlet weir is provided on the other side of the guide tube, and a drainage hole is provided at the connection position between the water outlet weir and the tank wall; a mud hopper is provided on the lower side of the guide tube, and a mud discharge pipe connected to the outside is provided on the lower side of the mud hopper.

[0012] Preferably, a top reinforcement steel trough is provided on the upper side of the top peripheral wall of the sedimentation tank.

[0013] Preferably, tank body partition plates are provided along the periphery of the four ABFT tanks and the sedimentation tank, further defining the tank body structure of the ABFT equipment.

[0014] Preferably, a walkway with stairs is provided on the upper side of the four ABFT tanks and the sedimentation tank in the arrangement direction, and a guardrail is provided on the side of the walkway, which is conducive to manual maintenance of the equipment.

[0015] Compared with the prior art, the beneficial effects of the utility model are: launching a complete set of ABFT integrated equipment for small-scale, small water volume treatment facilities, using a practical container-type equipment structure, avoiding civil construction period and high costs, improving the degree of project automation, and reducing project operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the ABFT sewage treatment device of the utility model.

[0017] Figure 2 yes Figure 1 Sectional view at "AA" in the figure.

[0018] Figure 3 yes Figure 1 Cross-sectional view at "BB" in the figure.

[0019] Figure 4 yes Figure 1 Sectional view at “CC” in the figure.

[0020] Figure 5 It is a structural schematic diagram of a water outlet weir of the utility model.

[0021] Figure 6 It is a structural schematic diagram of the pool surface part of the ABFT sewage treatment device of the utility model.

[0022] In the figure: 1. First ABFT pool; 2. Second ABFT pool; 3. Third ABFT pool; 4. Fourth ABFT pool; 5. Sedimentation tank; 6. Aeration pipe; 7. Aeration pipe inlet; 8. ABFT pool emptying and circulation flange; 9. First aeration pipe fixing bracket; 10. Connecting pipe; 11. Outlet weir; 12. Mud discharge pipe; 13. Drainage outlet; 14. Guide tube; 15. Mud bucket; 16. Equipment base; 17. Bottom connecting hole; 18. Filler fixing bracket; 19. Steel pipe bracket; 20. Pool top reinforcement channel steel; 21. Top connecting hole; 22. Grille plate; 23. Second aeration pipe fixing bracket; 24. Walkway and railing; 25. Pool body partition board. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Example 1: See attached Figure 1 To Attachment Figure 6 , an ABFT sewage treatment device, divided from the process function, the device of the present application is composed of five parts, including the first ABFT pool 1, the second ABFT pool 2, the third ABFT pool 3, the fourth ABFT pool 4 and the sedimentation pool 5 arranged from left to right. Among them, the sizes and structures of the four ABFT pools are exactly the same, and the positions and heights of the four ABFT pools connected to each other are different, that is, the first ABFT pool 1 and the second ABFT pool 2 and the third ABFT pool 3 and the fourth ABFT pool 4 are all provided with bottom connecting holes 17, the second ABFT pool 2 and the third ABFT pool 3 are provided with top connecting holes 21, and the fourth ABFT pool 4 and the sedimentation pool 5 are provided with a connecting pipe 10.

[0025] An aeration pipe group is provided in each ABFT pool. The aeration pipe group is composed of multiple groups of aeration pipes 6 arranged in different directions. Aeration pipe brackets are provided on the bottom and wall of the ABFT pool. The aeration pipes 6 are fixedly mounted on the aeration pipe brackets 9.

[0026] The aeration tube group includes five groups of first aeration tubes arranged vertically, two groups of second aeration tubes arranged horizontally on both sides of the first aeration tubes, and third aeration tubes vertically connected to the connection between the first aeration tubes and the second aeration tubes. A plurality of first aeration tube fixing brackets 9 are provided between the first aeration tube and the bottom of the ABFT tank, and the first aeration tube fixing brackets 9 are fixedly connected to the first aeration tube; a plurality of second aeration tube fixing brackets 23 are provided on the side wall of the ABFT tank, and the second aeration tube fixing brackets 23 are fixedly connected to the third aeration tube.

[0027] Two groups of pool grating plates 22 arranged up and down are provided in the ABFT pool. A group of filler fixing brackets 18 are provided at the lower side of each group of pool grating plates 22. An aeration pipe inlet 7 is provided at the upper end of the third aeration pipe, and a steel pipe bracket 19 is provided at the bottom of the ABFT pool. An ABFT pool emptying and circulation flange 8 is provided between the pipes of the aeration pipe.

[0028] A guide tube 14 is provided on the upper side of the sedimentation tank 5, a water outlet weir 11 is provided on the other side of the guide tube 14, and a drainage hole 13 is provided at the connection position between the water outlet weir 11 and the tank wall; a mud bucket 15 is provided on the lower side of the guide tube, and a mud discharge pipe connected to the outside is provided on the lower side of the mud bucket 15. A tank top reinforcement channel steel 20 is provided on the upper side of the top peripheral wall of the sedimentation tank 5.

[0029] Tank body partition plates 25 are provided along the peripheries of the first ABFT tank 1 , the second ABFT tank 2 , the third ABFT tank 3 , the fourth ABFT tank 4 and the sedimentation tank 5 .

[0030] A walkway with stairs is provided on the upper side along the arrangement direction of the first ABFT tank 1, the second ABFT tank 2, the third ABFT tank 3, the fourth ABFT tank 4 and the sedimentation tank 5, and a guardrail 24 is provided on the side of the walkway.

[0031] The utility model launches a complete set of ABFT integrated equipment for small-scale and small water volume treatment facilities. It uses a practical container-type equipment structure to avoid civil construction period and high costs, improve the project automation level, and reduce project operating costs.

[0032] Embodiment 2:

[0033] See attached Figure 1 To Attachment Figure 6 From the perspective of process function, the device of the present application is composed of five parts, including the first ABFT pool 1, the second ABFT pool 2, the third ABFT pool 3, the fourth ABFT pool 4 and the sedimentation pool 5, which are arranged from left to right. Among them, the sizes and structures of the four ABFT pools are exactly the same, and the positions and heights of the four ABFT pool bodies connected to each other are different, that is, there are a number of bottom connecting holes 17 between the first ABFT pool 1 and the second ABFT pool 2 and between the third ABFT pool 3 and the fourth ABFT pool 4, a number of top connecting holes 21 are provided between the second ABFT pool 2 and the third ABFT pool 3, and a connecting pipe 10 is provided between the fourth ABFT pool 4 and the sedimentation pool 5.

[0034] The first ABFT pool 1 has a pool body size of 3m (L) × 3m (B) × 3.1m (H), with the equipment base 16 0.1m from the bottom of the pool body. The equipment is designed to operate at a water level of 2.8m. It shares a pool wall with the second ABFT pool 2, and three 0.2m (H) × 0.3m (B) connecting holes 17 are evenly arranged at the bottom of the shared pool wall. The bottom of the connecting hole 17 is 0m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool body, and the center of the drain port pipe is 0.05m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0035] The pool structure starts from the bottom to the top in the vertical space, and the bottom of the pool has several groups of aeration pipe fixing brackets 9 evenly arranged on the ground. A D50 perforated aeration pipe 6 system composed of aeration pipes 6 is fixedly connected to the aeration pipe fixing brackets 9. The center of the aeration pipe 6 is 0.15m away from the bottom of the pool. The D75 air inlet pipe is connected to the aeration pipe 6 system vertically downward from the water surface, and two fixing brackets are evenly arranged on the pool wall for the entire air inlet pipe.

[0036] Above the aeration pipe 6 is the first layer of filler fixing bracket 18, the upper surface of the bracket is 0.4m away from the pool bottom, the bracket material is 6# channel steel, a square frame is arranged along the pool wall, 2 DN50 steel pipes are evenly arranged in the frame as crossbeams, a layer of fiberglass pool grating plate 22 is laid on the crossbeam, and a batch of special biological fillers with a specification of 50×50mm are placed on the pool grating plate 22.

[0037] The second layer of filler fixing bracket 18 is located above the biological filler. The upper surface of the bracket is 2.4 m away from the pool bottom. The structure and material are exactly the same as the first layer. A layer of fiberglass pool grating 22 is laid on it. No biological filler is placed on the pool grating 22.

[0038] The second ABFT pool 2 has the same size and structure as the first ABFT pool 1. The equipment is designed to operate at a water level of 2.8 m. It shares a pool wall with the third ABFT pool 3. Three 0.2 m (H) × 0.3 m (B) connecting holes are evenly arranged on the top of the shared pool wall. The bottom of the connecting hole is 2.7 m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool body. The center of the drain port pipe is 0.05 m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0039] The third ABFT pool 3 has the same size and structure as the first ABFT pool 1. The equipment is designed to operate at a water level of 2.8m. It shares a pool wall with the fourth ABFT pool 4. Three 0.2m (H) × 0.3m (B) connecting holes are evenly arranged at the bottom of the shared pool wall. The bottom of the connecting hole is 0m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool body. The center of the drain port pipe is 0.05m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0040] The fourth ABFT pool 4 has the same size and structure as the first ABFT pool 1. The equipment is designed to operate at a water level of 2.8m. It shares a pool wall with the sedimentation tank 5. A DN100 connecting pipe 10 is arranged on the top of the shared pool wall. The center of the connecting pipe 10 is 2.65m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool. The center of the drain port pipe is 0.05m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0041] The size of the sedimentation tank 5 is 2m (L) × 3m (B) × 3.1m (H). The sedimentation tank 5 is a vertical flow sedimentation tank 5. The mud hopper 15 arranged at the bottom of the tank body is in a conical structure. A mud discharge pipe is arranged at the bottom of the mud hopper 15 to the outer wall of the tank body. The center of the mud discharge pipe is 0.05m away from the bottom of the tank. A guide tube 14 with a diameter of 450mm is suspended by a bracket directly above the mud hopper 15. One side of the guide tube 14 is connected to the ABFT tank 4 through a DN100 connecting pipe 10 flange. An outlet weir 11 is arranged on the other side of the guide tube 14. The outlet weir 11 is 3 meters long, 0.2 meters wide and 0.25 meters high. The weir plate is processed with a 50mm high overflow groove. A DN100 outlet 13 is arranged at the connection position between the outlet weir 11 and the tank wall. The center of the outlet pipe is 2.4m away from the bottom of the tank, and a flange is arranged on the pipe outside the tank wall.

[0042] The sewage treatment process in the equipment is: water inlet → first ABFT tank 1 → second ABFT tank 2 → third ABFT tank 3 → fourth ABFT tank 4 → sedimentation tank 5 → water outlet. The sewage flows by gravity, and internal reflow is set between the first ABFT tank 1 to the fourth ABFT tank 4.

[0043] The utility model is arranged at the rear end of the conventional process and connected in series therewith, ensuring that the effluent meets the standards while reducing the number of AO stages, thereby reducing the construction cost of the AO pool body; secondly, compared with the AO process section, the utility model has lower oxygen and carbon source requirements during operation, saving operating costs; finally, in the case of the conventional AO process without setting up enough multi-stage AO pools, the treated effluent often carries a large amount of pollutants that are not completely purified, requiring deep treatment of the pollutants or adding a section of AO process pool body to ensure the treatment degree. In this case, the utility model can replace a section of AO process in the process, which can effectively reduce operating costs.

[0044] Beneficial effects: (1) The equipment structure is optimized to make it fully equipped with all the functions of civil engineering structures, thus avoiding the construction cost of civil engineering pools; (2) The biofilm process can reduce the oxygen supply by about 60% and the carbon source usage by about 50% compared with the AO process during operation, and the effluent quality is significantly better than that of the single multi-stage AO process.

[0045] Embodiment 3:

[0046] See attached Figure 1 To Attachment Figure 6From the perspective of process function, the device of the present application is composed of five parts, including the first ABFT pool 1, the second ABFT pool 2, the third ABFT pool 3, the fourth ABFT pool 4 and the sedimentation pool 5, which are arranged from left to right. Among them, the sizes and structures of the four ABFT pools are exactly the same, and the positions and heights of the four ABFT pool bodies connected to each other are different, that is, there are a number of bottom connecting holes 17 between the first ABFT pool 1 and the second ABFT pool 2 and between the third ABFT pool 3 and the fourth ABFT pool 4, a number of top connecting holes 21 are provided between the second ABFT pool 2 and the third ABFT pool 3, and a connecting pipe 10 is provided between the fourth ABFT pool 4 and the sedimentation pool 5.

[0047] An aeration pipe group is provided in each ABFT pool. The aeration pipe group is composed of multiple groups of aeration pipes 6 arranged in different directions. Aeration pipe brackets are provided on the bottom and wall of the ABFT pool. The aeration pipes 6 are fixedly mounted on the aeration pipe brackets 9.

[0048] The aeration tube group includes five groups of first aeration tubes arranged vertically, two groups of second aeration tubes arranged horizontally on both sides of the first aeration tubes, and third aeration tubes vertically connected to the connection between the first aeration tubes and the second aeration tubes. A plurality of first aeration tube fixing brackets 9 are provided between the first aeration tube and the bottom of the ABFT tank, and the first aeration tube fixing brackets 9 are fixedly connected to the first aeration tube; a plurality of second aeration tube fixing brackets 23 are provided on the side wall of the ABFT tank, and the second aeration tube fixing brackets 23 are fixedly connected to the third aeration tube.

[0049] Two groups of pool grating plates 22 arranged up and down are provided in the ABFT pool. A group of filler fixing brackets 18 are provided at the lower side of each group of pool grating plates 22. An aeration pipe inlet 7 is provided at the upper end of the third aeration pipe. An ABFT pool emptying and circulation flange 8 is provided between the pipes of the aeration pipe.

[0050] A tank top reinforcement channel steel 20 is provided on the upper side of the top peripheral wall of the sedimentation tank 5. Tank body partition plates 25 are provided around the first ABFT tank 1, the second ABFT tank 2, the third ABFT tank 3, the fourth ABFT tank 4 and the sedimentation tank 5.

[0051] A walkway with stairs is provided on the upper side along the arrangement direction of the first ABFT tank 1, the second ABFT tank 2, the third ABFT tank 3, the fourth ABFT tank 4 and the sedimentation tank 5, and a guardrail 24 is provided on the side of the walkway.

[0052] The utility model launches a complete set of ABFT integrated equipment for small-scale and small water volume treatment facilities. It uses a practical container-type equipment structure to avoid civil construction period and high costs, improve the project automation level, and reduce project operating costs.

[0053] The first ABFT pool 1 has a pool body size of 3m (L) × 3m (B) × 3.1m (H). The base of the equipment is 0.1m from the bottom of the pool body. The designed operating water level of the equipment is 2.8m. It shares a pool wall with the second ABFT pool 2. Three 0.2m (H) × 0.3m (B) connecting holes are evenly arranged at the bottom of the shared pool wall. The bottom of the connecting hole is 0m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool body. The center of the drain port pipe is 0.05m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0054] The pool structure starts from the bottom to the top in the vertical space, and the bottom of the pool has several groups of aeration pipe fixing brackets 9 evenly arranged on the ground. A D50 perforated aeration pipe 6 system composed of aeration pipes 6 is fixedly connected to the aeration pipe fixing brackets 9. The center of the aeration pipe 6 is 0.15m away from the bottom of the pool. The D75 air inlet pipe is connected to the aeration pipe 6 system vertically downward from the water surface, and two fixing brackets are evenly arranged on the pool wall for the entire air inlet pipe.

[0055] Above the aeration pipe 6 is the first layer of filler fixing bracket 18, the upper surface of the bracket is 0.4m away from the pool bottom, the bracket material is 6# channel steel, a square frame is arranged along the pool wall, 2 DN50 steel pipes are evenly arranged in the frame as crossbeams, a layer of fiberglass pool grating plate 22 is laid on the crossbeam, and a batch of special biological fillers with a specification of 50×50mm are placed on the pool grating plate 22.

[0056] The second layer of filler fixing bracket 18 is located above the biological filler. The upper surface of the bracket is 2.4 m away from the pool bottom. The structure and material are exactly the same as the first layer. A layer of fiberglass pool grating 22 is laid on it. No biological filler is placed on the pool grating 22.

[0057] The second ABFT pool 2 has the same size and structure as the first ABFT pool 1. The equipment is designed to operate at a water level of 2.8 m. It shares a pool wall with the third ABFT pool 3. Three 0.2 m (H) × 0.3 m (B) connecting holes are evenly arranged on the top of the shared pool wall. The bottom of the connecting hole is 2.7 m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool body. The center of the drain port pipe is 0.05 m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0058] The third ABFT pool 3 has the same size and structure as the first ABFT pool 1. The equipment is designed to operate at a water level of 2.8m. It shares a pool wall with the fourth ABFT pool 4. Three 0.2m (H) × 0.3m (B) connecting holes are evenly arranged at the bottom of the shared pool wall. The bottom of the connecting hole is 0m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool body. The center of the drain port pipe is 0.05m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0059] The fourth ABFT pool 4 has the same size and structure as the first ABFT pool 1. The equipment is designed to operate at a water level of 2.8m. It shares a pool wall with the sedimentation tank 5. A DN100 connecting pipe 10 is arranged on the top of the shared pool wall. The center of the connecting pipe 10 is 2.65m away from the pool bottom. A DN100 drain port is arranged in the middle of the outer wall of the pool. The center of the drain port pipe is 0.05m away from the pool bottom. A flange is arranged on the pipe outside the pool wall.

[0060] The size of the sedimentation tank 5 is 2m (L) × 3m (B) × 3.1m (H). The sedimentation tank 5 is a vertical flow sedimentation tank 5. The mud hopper 15 arranged at the bottom of the tank body is in a conical structure. A mud discharge pipe is arranged at the bottom of the mud hopper 15 to the outer wall of the tank body. The center of the mud discharge pipe is 0.05m away from the bottom of the tank. A guide tube 14 with a diameter of 450mm is suspended by a bracket directly above the mud hopper 15. One side of the guide tube 14 is connected to the ABFT tank 4 through a DN100 connecting pipe 10 flange. An outlet weir 11 is arranged on the other side of the guide tube 14. The outlet weir 11 is 3 meters long, 0.2 meters wide and 0.25 meters high. The weir plate is processed with a 50mm high overflow groove. A DN100 outlet 13 is arranged at the connection position between the outlet weir 11 and the tank wall. The center of the outlet pipe is 2.4m away from the bottom of the tank, and a flange is arranged on the pipe outside the tank wall.

[0061] The sewage treatment process in the equipment is: water inlet → first ABFT tank 1 → second ABFT tank 2 → third ABFT tank 3 → fourth ABFT tank 4 → sedimentation tank 5 → water outlet. The sewage flows by gravity, and internal reflow is set between the first ABFT tank 1 to the fourth ABFT tank 4.

[0062] The utility model is arranged at the rear end of the conventional process and connected in series therewith, ensuring that the effluent meets the standards while reducing the number of AO stages, thereby reducing the construction cost of the AO pool body; secondly, compared with the AO process section, the utility model has lower oxygen and carbon source requirements during operation, saving operating costs; finally, in the case of the conventional AO process without setting up enough multi-stage AO pools, the treated effluent often carries a large amount of pollutants that are not completely purified, requiring deep treatment of the pollutants or adding a section of AO process pool body to ensure the treatment degree. In this case, the utility model can replace a section of AO process in the process, which can effectively reduce operating costs.

[0063] Beneficial effects: (1) The equipment structure is optimized to make it fully equipped with all the functions of civil engineering structures, thus avoiding the construction cost of civil engineering pools; (2) The biofilm process can reduce the oxygen supply by about 60% and the carbon source usage by about 50% compared with the AO process during operation, and the effluent quality is significantly better than that of the single multi-stage AO process.

Claims

1. An ABFT sewage treatment device, characterized in that: It includes the first ABFT pool, the second ABFT pool, the third ABFT pool, the fourth ABFT pool and the sedimentation pool, which are arranged from left to right. The sizes and structures of the four ABFT pools are exactly the same. Bottom connecting holes are provided between the first ABFT pool and the second ABFT pool and between the third ABFT pool and the fourth ABFT pool. A top connecting hole is provided between the second ABFT pool and the third ABFT pool. A connecting pipe is provided between the fourth ABFT pool and the sedimentation tank.

2. The ABFT sewage treatment device according to claim 1 is characterized in that: An aeration tube group is arranged in the ABFT pool, which includes several groups of vertically arranged first aeration tubes, two groups of horizontal aeration tubes connected to both ends of the first aeration tubes, and a third aeration tube vertically connected to the connection between the first aeration tube and the second aeration tube.

3. The ABFT sewage treatment device according to claim 2 is characterized in that: Several first aeration tube fixing brackets are provided between the first aeration tube and the bottom of the ABFT pool, and the first aeration tube fixing brackets are fixedly connected to the first aeration tube; several second aeration tube fixing brackets are provided on the side wall of the ABFT pool, and the second aeration tube fixing brackets are fixedly connected to the third aeration tube.

4. The ABFT sewage treatment device according to claim 1, characterized in that: There are two sets of grid plates arranged up and down in the ABFT pool.

5. The ABFT sewage treatment device according to claim 4 is characterized in that: A set of filler fixing brackets are provided on the lower side of each set of grid plates.

6. An ABFT sewage treatment device according to any one of claims 1 to 5, characterized in that: A guide tube is provided on the upper side of the sedimentation tank, a water outlet weir is provided on the other side of the guide tube, and a drainage hole is provided at the connection position between the water outlet weir and the tank wall; a mud hopper is provided on the lower side of the guide tube, and a mud discharge pipe connected to the outside is provided on the lower side of the mud hopper.

7. The ABFT sewage treatment device according to claim 6, characterized in that: A tank top reinforcement steel trough is provided on the upper side of the top peripheral wall of the sedimentation tank.

8. The ABFT sewage treatment device according to claim 1, characterized in that: Tank partition panels are installed along the perimeter of the four ABFT tanks and the sedimentation tank.

9. The ABFT sewage treatment device according to claim 1, characterized in that: A walkway with stairs is provided on the upper side along the arrangement direction of the four ABFT tanks and the sedimentation tank, and guardrails are provided on the sides of the walkway.

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