AAO biological tank

Abstract

The utility model discloses an AAO biological tank, and belongs to the technical field of sewage treatment, the AAO biological tank comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank, the four tank bodies are sequentially communicated through pipelines, a slope making layer in the slope flow direction is fixedly laid in each tank body, and a plurality of guide plates are fixedly arranged in the anaerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank. The flow guide plate is divided into a flow guide folded plate and a flow guide straight plate; a reflux pump is fixedly arranged between the anoxic tank and the aerobic tank; the four tanks are compactly arranged and are communicated with one another in sequence, so that the short flow phenomenon of sewage in the flowing process can be avoided, meanwhile, the arranged slope making layer can be used for guiding the sewage to flow in the slope direction, the orderliness of the sewage in the flowing process is improved, the backflow phenomenon is avoided, and the service life of the sewage is prolonged. And the arranged guide plates can also divide the space in each pool body into a plurality of water channels along the water flow direction, so that the sewage can orderly flow along the water channels in the flowing process.

Description

Technical Field

[0001] This application relates to the technical field of sewage treatment, and particularly to an AAO biological pond. Background Art

[0002] The A-A-O biological carbon and phosphorus removal process is a combination of traditional activated sludge process, biological nitrification and denitrification process, and biological phosphorus removal process. In this process flow, BOD, SS, and nitrogen and phosphorus in various forms will be removed together. In the activated sludge of this system, the bacterial flora mainly consists of nitrifying bacteria, denitrifying bacteria, and phosphorus-accumulating bacteria, and obligate anaerobic and general obligate aerobic bacterial flora are basically eliminated by the process. In the aerobic section, nitrifying bacteria convert the ammonia nitrogen in the influent and the ammonia nitrogen ammoniated from organic nitrogen into nitrate through biological nitrification; in the anoxic section, denitrifying bacteria convert the nitrate brought in by the internal reflux into nitrogen gas and escape into the atmosphere through biological denitrification, so as to achieve the purpose of nitrogen removal; in the anaerobic section, phosphorus-accumulating bacteria release phosphorus and absorb easily degradable organic substances such as low-level fatty acids; while in the aerobic section, phosphorus-accumulating bacteria absorb phosphorus in excess and remove phosphorus through the discharge of excess sludge.

[0003] Existing AAO biological ponds usually adopt a partitioned design, including an anaerobic zone, an anoxic zone, and an aerobic zone. However, the layout and flow channel design between each zone are relatively simple. When sewage flows through it, due to the lack of effective flow channel guiding measures, it is easy to have disordered flow or short-circuit flow, which affects the treatment efficiency. Therefore, an AAO biological pond is proposed for the above problems. Utility Model Content

[0004] Aiming at the deficiencies of the prior art, this application provides an AAO biological pond, which overcomes the deficiencies of the prior art and aims to solve the problem that the lack of flow channel guiding measures easily leads to disordered flow or short-circuit flow during the flow of sewage, thus affecting the treatment efficiency.

[0005] To achieve the above purpose, this application provides the following technical solutions:

[0006] The AAO biological pond includes an anaerobic pond, an anoxic pond, an aerobic pond, and a sedimentation pond. The above four pond bodies are sequentially connected through pipelines, and a slope layer sloping towards the flow direction is fixedly laid in each pond body. Plug valves are fixedly arranged on the pipelines. A number of flow guiding plates are fixedly arranged in the anaerobic pond, anoxic pond, aerobic pond, and sedimentation pond. The flow guiding plates are divided into flow guiding folding plates and flow guiding straight plates. A reflux pump is fixedly arranged between the anoxic pond and the aerobic pond.

[0007] By adopting the above technical solution, the four pools are connected in sequence, which can avoid the short-circuit phenomenon of sewage during the flow process. At the same time, the set slope-forming layer can guide the sewage to flow along the slope direction, improving the orderliness of the sewage during the flow process and also avoiding the backflow of sewage. In addition, the set baffle plate can also divide the space in each pool body into several water channels along the water flow direction, so that the sewage can flow orderly along the water channels during the flow process, avoiding the occurrence of turbulent flow.

[0008] As a preferred technical solution of the present application, the baffle folding plate body is a folding plate body, the tail end of the folding plate body is a bending section bent to one side, the head end of the folding plate body is provided with a baffle folding head, the baffle straight plate body is a straight plate body, and the head end of the straight plate body is provided with a straight plate baffle head.

[0009] By adopting the above technical solution, the impact of the smaller water flow on the plate body by the baffle folding head or the straight plate baffle head can be used to better achieve the shunt and diversion effect. In addition, the bending section on the baffle folding plate can exert a lateral thrust when the water flow contacts it, causing the water flow to change direction and flow towards the outlet, improving the orderliness of the water flow.

[0010] As a preferred technical solution of the present application, a water inlet pipe is hermetically connected to the anaerobic tank, three baffle folding plates are fixedly arranged in the anaerobic tank, and the bending section at the tail end of the baffle folding plate points to the pipe orifice on the anaerobic tank. The slope-forming layer in the anaerobic tank slopes from the water inlet pipe along the arrangement direction of the baffle folding plate towards the pipe orifice thereon.

[0011] By adopting the above technical solution, the sewage can flow orderly from the water inlet pipe to the pipe orifice under the combined action of the slope-forming layer and the baffle folding plate, facilitating the smooth and efficient entry into the next pool body.

[0012] As a preferred technical solution of the present application, three baffle folding plates are fixedly arranged in the anoxic tank, and the bending section at the tail end of the baffle folding plate points to the pipe orifice communicating with the aerobic tank. The slope-forming layer in the anoxic tank slopes from the pipe orifice communicating with the anaerobic tank along the arrangement direction of the baffle folding plate towards the pipe orifice communicating with the aerobic tank.

[0013] By adopting the above technical solution, the sewage can flow orderly through the entire anoxic tank and then to the pipe orifice under the combined action of the slope-forming layer and the baffle folding plate, facilitating the smooth and efficient entry of the sewage into the next pool body.

[0014] As a preferred technical solution of the present application, three baffle folding plates are fixedly arranged in the aerobic tank, and the bending section at the tail end of the baffle folding plate points to the pipe orifice communicating with the sedimentation tank. The slope-forming layer in the aerobic tank slopes from the pipe orifice communicating with the anoxic tank along the arrangement direction of the baffle folding plate towards the pipe orifice communicating with the sedimentation tank.

[0015] By adopting the above technical solution, the sewage can flow orderly through the entire aerobic tank under the combined action of the slope-forming layer and the diversion folding plate and then flow to the pipe orifice, facilitating the smooth and efficient entry of the sewage into the next tank body.

[0016] As a preferred technical solution of the present application, a water suction pipe is hermetically connected to the input interface of the reflux pump, one end of the water suction pipe far from the reflux pump extends into the aerobic tank, a drain pipe is hermetically connected to the output interface of the reflux pump, and one end of the drain pipe far from the reflux pump extends into the anoxic tank.

[0017] By adopting the above technical solution, the reflux of the mixed liquid in the whole process can be realized, providing a necessary energy source for the biological work in the anoxic tank.

[0018] As a preferred technical solution of the present application, a water outlet pipe is hermetically connected to the sedimentation tank, two diversion straight plates are fixedly arranged in the sedimentation tank, and the slope-forming layer in the sedimentation tank slopes from the pipe orifice communicating with the aerobic tank along the arrangement direction of the diversion straight plates to the water outlet pipe orifice above it.

[0019] By adopting the above technical solution, the sewage can flow orderly through the entire sedimentation tank under the combined action of the slope-forming layer and the diversion straight plates and then flow to the water outlet pipe orifice, facilitating the discharge of the treated sewage.

[0020] As a preferred technical solution of the present application, an anti-corrosion coating is evenly sprayed on the outer surfaces of the diversion folding plate and the diversion straight plates.

[0021] By adopting the above technical solution, the service life of the diversion folding plate and the diversion straight plates can be effectively prolonged.

[0022] Advantages of the present application: The four tanks are arranged compactly, which can reduce the occupied space and are connected in sequence with each other, avoiding the short-circuit phenomenon of the sewage during the flow process. At the same time, the slope-forming layer can be set to guide the sewage to flow along the slope direction, improving the orderliness of the sewage during the flow process and also avoiding the sewage from flowing back. In addition, the diversion plates provided can also divide the space in each tank body into several water channels along the water flow direction, enabling the sewage to flow orderly along the water channels during the flow process and avoiding the occurrence of turbulent flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 It is a schematic diagram of the partial structure of the anaerobic tank and the anoxic tank of the present application;

[0025] Figure 3 It is a schematic diagram of the partial structure of the anoxic tank and the aerobic tank of the present application;

[0026] Figure 4 Schematic diagram of the flow deflector structure of this application.

[0027] In the figure: 1, anaerobic pond; 2, anoxic pond; 3, aerobic pond; 4, sedimentation pond; 5, pipeline; 51, flap valve; 6, slope layer; 7, flow deflector; 71, flow deflecting flap; 711, flap main body; 712, bending section; 713, flap flow deflector head; 72, flow deflecting straight plate; 721, straight plate main body; 722, straight plate flow deflector head; 8, reflux pump; 81, suction pipe; 82, drain pipe; 91, inlet pipe; 92, outlet pipe. Specific embodiments

[0028] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0029] Refer to Figure 1 , the AAO biological pond includes an anaerobic pond 1, an anoxic pond 2, an aerobic pond 3, and a sedimentation pond 4. The above four pond bodies are sequentially connected through a pipeline 5, and a slope layer 6 with a slope towards the flow direction is fixedly laid in each pond body. A flap valve 51 is fixedly arranged on the pipeline 5. A number of flow deflectors 7 are fixedly arranged in the anaerobic pond 1, anoxic pond 2, aerobic pond 3, and sedimentation pond 4. The flow deflector 7 is divided into a flow deflecting flap 71 and a flow deflecting straight plate 72. A reflux pump 8 is fixedly arranged between the anoxic pond 2 and the aerobic pond 3. The above technical solution connects the four ponds in sequence, which can avoid the short-circuit phenomenon of sewage during the flow process. At the same time, the set slope layer 6 can guide the sewage to flow along the slope, improving the orderliness of the sewage during the flow process and also avoiding the backflow of sewage. In addition, the set flow deflector 7 can also divide the space in each pond body into several water channels along the water flow direction, so that the sewage can flow orderly along the water channels during the flow process, avoiding the occurrence of turbulent flow.

[0030] Refer to Figure 4, the main body of the flow guide baffle 71 is the baffle main body 711. The tail end of the baffle main body 711 is a bent section 712 that bends towards one side. A baffle flow guide head 713 is provided at the head end of the baffle main body 711. The main body of the flow guide straight plate 72 is the straight plate main body 721. A straight plate flow guide head 722 is provided at the head end of the straight plate main body 721. By adopting the above technical solution, the impact of the smaller water flow of the baffle flow guide head 713 or the straight plate flow guide head 722 on the plate body can be reduced, and a better flow splitting and guiding effect can be achieved. In addition, the bent section 712 on the flow guide baffle 71 can exert a lateral thrust when the water flow contacts it, causing the water flow to change direction and flow towards the outlet, improving the orderliness of the water flow. In particular, the outer surfaces of the flow guide baffle 71 and the flow guide straight plate 72 are evenly sprayed with an anti-corrosion coating. This technical solution can effectively extend the service life of the flow guide baffle 71 and the flow guide straight plate 72.

[0031] Refer to Figure 2 , a water inlet pipe 91 is hermetically connected to the anaerobic tank 1. Three flow guide baffles 71 are fixedly arranged in the anaerobic tank 1, and the bent section 712 at the tail end of the flow guide baffle 71 points to the pipe orifice 5 on the anaerobic tank 1. The slope layer 6 in the anaerobic tank 1 slopes from the water inlet pipe 91 along the arrangement direction of the flow guide baffle 71 towards the pipe orifice 5 thereon. By adopting the above technical solution, the sewage can flow orderly from the water inlet pipe 91 to the pipe orifice 5 under the combined action of the slope layer 6 and the flow guide baffle 71, facilitating smooth and efficient entry into the next tank body.

[0032] Refer to Figure 2 , three flow guide baffles 71 are fixedly arranged in the anoxic tank 2, and the bent section 712 at the tail end of the flow guide baffle 71 points to the pipe orifice 5 communicating with the aerobic tank 3. The slope layer 6 in the anoxic tank 2 slopes from the pipe orifice 5 communicating with the anaerobic tank 1 along the arrangement direction of the flow guide baffle 71 towards the pipe orifice 5 communicating with the aerobic tank 3. By adopting the above technical solution, the sewage can flow orderly through the entire anoxic tank 2 and then towards the pipe orifice 5 under the combined action of the slope layer 6 and the flow guide baffle 71, facilitating smooth and efficient entry of the sewage into the next tank body.

[0033] Refer to Figure 3 , three flow guide baffles 71 are fixedly arranged in the aerobic tank 3, and the bent section 712 at the tail end of the flow guide baffle 71 points to the pipe orifice 5 communicating with the sedimentation tank 4. The slope layer 6 in the aerobic tank 3 slopes from the pipe orifice 5 communicating with the anoxic tank 2 along the arrangement direction of the flow guide baffle 71 towards the pipe orifice 5 communicating with the sedimentation tank 4. By adopting the above technical solution, the sewage can flow orderly through the entire aerobic tank 3 and then towards the pipe orifice 5 under the combined action of the slope layer 6 and the flow guide baffle 71, facilitating smooth and efficient entry of the sewage into the next tank body.

[0034] Refer to Figure 3, the input interface of the reflux pump 8 is hermetically connected to a water suction pipe 81, one end of the water suction pipe 81 away from the reflux pump 8 extends into the aerobic tank 3, the output interface of the reflux pump 8 is hermetically connected to a drain pipe 82, and one end of the drain pipe 82 away from the reflux pump 8 extends into the anoxic tank 2. By adopting the above technical solution, part of the mixed liquid in the aerobic tank 3 can be pumped back into the anoxic tank 2 to realize the reflux of the mixed liquid in the whole process and provide a necessary energy source for the biological work in the anoxic tank 2.

[0035] Refer to Figure 1 , a water outlet pipe 92 is hermetically connected to the sedimentation tank 4, two diversion straight plates 72 are fixedly arranged in the sedimentation tank 4, and the slope layer 6 in the sedimentation tank 4 slopes from the pipe orifice of the pipe 5 communicating with the aerobic tank 3 along the arrangement direction of the diversion straight plates 72 towards the pipe orifice of the water outlet pipe 92 thereon. By adopting the above technical solution, it can enable the sewage to flow orderly through the entire sedimentation tank 4 and then towards the pipe orifice of the water outlet pipe 92 under the combined action of the slope layer 6 and the diversion straight plates 72, facilitating the discharge of the treated sewage.

[0036] Working principle: The anaerobic tank 1, the anoxic tank 2, the aerobic tank 3 and the sedimentation tank 4 are sequentially connected through the pipe 5, so that the sewage passes through the above four tanks in sequence during the flowing process, which can avoid the short-circuit phenomenon of the sewage during the flowing process; and the set slope layer 6 always keeps the set slope direction consistent with the flowing direction of the water flow, and thus can guide the sewage to flow along the slope direction, making the sewage always flow according to the preset flow path during the flowing process, improving the orderliness of the sewage during the flowing process and also avoiding the situation of sewage backflow.

[0037] The set baffle 7 can also divide the space in each tank body into several water channels along the water flow direction, so that the sewage can flow orderly along the water channels during the flowing process, avoiding the occurrence of turbulent flow. In particular, the bent section 712 on the diversion folded plate 71 of the baffle 7 can exert a lateral thrust when the water flow contacts it, causing the water flow to change direction and flow towards the inlet of the next tank body to ensure the orderliness of the water flow.

[0038] In addition, the reflux pump 8 can pump part of the mixed liquid in the aerobic tank 3 back into the anoxic tank 2 to realize the reflux of the mixed liquid in the whole process and provide a necessary energy source for the biological work in the anoxic tank 2.

[0039] The above are only the preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An AAO biological pond, comprising an anaerobic pond (1), an anoxic pond (2), an aerobic pond (3) and a sedimentation pond (4), characterized in that: The four tank bodies are connected in sequence through pipelines (5), and a slope layer (6) sloping in the flow direction is fixedly laid in each tank body. A plug valve (51) is fixedly arranged on the pipeline (5). A plurality of guide plates (7) are fixedly arranged in the anaerobic tank (1), the anoxic tank (2), the aerobic tank (3) and the sedimentation tank (4). The guide plates (7) are divided into guide folded plates (71) and guide straight plates (72). A reflux pump (8) is fixedly arranged between the anoxic tank (2) and the aerobic tank (3).

2. The AAO biological pond according to claim 1, characterized in that The main body of the flow-guiding folding plate (71) is a folding plate main body (711); the tail end of the folding plate main body (711) is a bending section (712) bent to one side; the head end of the folding plate main body (711) is provided with a folding plate flow-guiding head (713); the main body of the flow-guiding straight plate (72) is a straight plate main body (721); the head end of the straight plate main body (721) is provided with a straight plate flow-guiding head (722).

3. The AAO biological pond according to claim 2, characterized in that The anaerobic tank (1) is sealed with a water inlet pipe (91), three guide folding plates (71) are fixedly arranged in the anaerobic tank (1), and the bent sections (712) at the tail ends of the guide folding plates (71) point to the pipe openings of the pipes (5) on the anaerobic tank (1), and the slope layer (6) in the anaerobic tank (1) slopes from the water inlet pipe (91) along the arrangement direction of the guide folding plates (71) toward the pipe openings of the pipes (5) thereon.

4. The AAO biological pond according to claim 2, characterized in that Three guide folding plates (71) are fixedly arranged in the anoxic tank (2), and the bent sections (712) at the tail ends of the guide folding plates (71) point to the pipe opening of the pipe (5) connected to the aerobic tank (3). The slope layer (6) in the anoxic tank (2) slopes from the pipe opening of the pipe (5) connected to the anaerobic tank (1) toward the pipe opening of the pipe (5) connected to the aerobic tank (3) along the arrangement direction of the guide folding plates (71).

5. The AAO biological pond according to claim 2, characterized in that Three guide folding plates (71) are fixedly arranged in the aerobic tank (3), and the bent sections (712) at the tail ends of the guide folding plates (71) point to the pipe opening of the pipe (5) connected to the sedimentation tank (4). The slope layer (6) in the aerobic tank (3) slopes from the pipe opening of the pipe (5) connected to the anoxic tank (2) toward the pipe opening of the pipe (5) connected to the sedimentation tank (4) along the arrangement direction of the guide folding plates (71).

6. The AAO biological pond according to claim 1, characterized in that The input interface of the reflux pump (8) is sealedly connected to a water pumping pipe (81), and one end of the water pumping pipe (81) away from the reflux pump (8) extends into the aerobic pool (3). The output interface of the reflux pump (8) is sealedly connected to a drainage pipe (82), and one end of the drainage pipe (82) away from the reflux pump (8) extends into the anoxic pool (2).

7. The AAO biological pond according to claim 2, characterized in that The sedimentation tank (4) is sealed with a water outlet pipe (92), and two guide straight plates (72) are fixedly arranged in the sedimentation tank (4). The slope layer (6) in the sedimentation tank (4) slopes from the pipe opening of the pipeline (5) connected to the aerobic tank (3) along the arrangement direction of the guide straight plates (72) toward the pipe opening of the water outlet pipe (92) thereon.

8. The AAO biological pond according to claim 1, characterized in that The outer surfaces of the guide folding plate (71) and the guide straight plate (72) are evenly sprayed with an anti-corrosion coating.

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