Improved A2O biological tank

Abstract

The utility model discloses an improved A2O biological tank which comprises a biological tank body, one side of an inner cavity of the biological tank body is fixedly connected with a selection frame, a partition plate is fixedly connected between the rear part of the inner cavity of the biological tank body and the rear part of the selection frame, one side of the partition plate is fixedly connected with a baffle plate, and the other side of the partition plate is fixedly connected with a baffle plate. An anaerobic zone is arranged in the biological tank body and is positioned behind the selection frame. The utility model relates to the technical field of biological tanks. According to the improved A2O biological tank, in-frame water inlet, aeration stirring and sludge backflow are selected; stirring and refluxing in the anaerobic zone, the anoxic zone and the aerobic zone; aeration is carried out through a plurality of aeration pipes, and static precipitation is carried out; therefore, the improved A2O biological tank aims at efficient biological nitrogen and phosphorus removal, the process operation is reliable, the use of chemical agents can be well saved, in addition, the operation management is convenient, the improved process is high in impact load resistance, the operation is more stable, and the sludge is high in fertilizer efficiency and can be used as sludge compost.

Description

Technical Field

[0001] The utility model relates to the technical field of biological pools, in particular to an improved A2O biological pool. Background Art

[0002] A2O biological pool is a biological treatment pool that uses A-A2O sewage treatment process. A-A2O sewage treatment process refers to the process of sewage treatment in a treatment pool that undergoes pre-anoxic-anaerobic-anoxic-aerobic processes. When it is in normal operation, it has a good sewage treatment effect.

[0003] However, when the A2O biological pool is operated at an ultra-low load with a small influent volume, the influent organic matter concentration is seriously low, resulting in reduced activity of the system's activated sludge due to lack of nutrients. At the same time, the original continuous aeration operation mode of the A2O biological pool causes the activated sludge to self-oxidize due to severe lack of organic matter. In addition, the influent organic matter concentration is low, and the carbon source required for the denitrification reaction is seriously insufficient. Nitrate nitrogen cannot be reduced normally, affecting the total nitrogen removal effect. Therefore, when the A2O biological pool is under ultra-low load and low carbon source influent conditions, there is a defect of low total nitrogen and total phosphorus removal rate, and it is difficult for the effluent to meet the standards continuously and stably. At the same time, it causes a large energy loss in the normal operation of the biological pool. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides an improved A2O biological pool, which solves the problem that when the A2O biological pool is under ultra-low load and low carbon source inlet conditions, there is a low total nitrogen and total phosphorus removal rate, and the effluent is difficult to meet the standards continuously and stably.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: an improved A2O biological pool, including a biological pool body, a selection frame is fixedly connected to one side of the inner cavity of the biological pool body, a partition plate is fixedly connected between the rear part of the inner cavity of the biological pool body and the rear part of the selection frame, a shielding plate is fixedly connected to one side of the partition plate, an anaerobic zone is arranged inside the biological pool body and behind the selection frame, an aerobic zone and an anoxic zone are respectively arranged on one side of the partition plate and in front and rear of the shielding plate, water holes are provided at the front and rear of the selection frame, a connecting hole is provided on one side of the partition plate, a connecting plate is fixedly connected to the top of the inner cavity of the biological pool body, a support frame is fixedly installed on the top of the connecting plate, a vent pipe is fixedly installed inside the support frame, and an aeration pipe is connected to the front and rear of the outer surface of the vent pipe.

[0006] Preferably, a water inlet box is fixedly installed on one side of the front of the biological pool body, one side of the water inlet box is connected to a water inlet pipe, the front of the biological pool body is connected to a sludge return pipe, and water inlet holes are opened at the rear of the water inlet box and the front of the biological pool body.

[0007] Preferably, a plurality of underwater pushers are provided on the inner wall of the selection frame and one side of the water hole, and arc guide plates are fixedly connected to the bottom of the inner cavity of the biological pool body and at the front and rear of the baffle.

[0008] Preferably, an air inlet pipe is provided on one side of the biological pond body, and one end of the air inlet pipe is connected to one end of the ventilation pipe.

[0009] Preferably, the other side of the front portion of the biological pond body is connected to a water outlet pipe.

[0010] Preferably, a sewage inspection well is provided at the rear of the biological pool body. Beneficial Effects

[0011] The utility model provides an improved A2O biological pool. Compared with the existing technology, it has the following beneficial effects:

[0012] The utility model selects water inlet, aeration stirring and sludge reflow in the frame; stirring and reflow in the anaerobic zone, the anoxic zone and the aerobic zone; and aeration and static sedimentation through multiple aeration pipes; thereby achieving the improved A2O biological pool for efficient biological nitrogen and phosphorus removal, the process operation is reliable, the use of chemical agents can be well saved, and the operation and management are convenient. The improved process has strong impact load resistance and is more stable in operation. The sludge has high fertilizer efficiency and can be used as sludge compost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the biological pool body, the ventilation pipe, the aeration pipe and the underwater pusher of the utility model;

[0015] Figure 3 It is a side view of the internal structure of the utility model;

[0016] Figure 4 The utility model is a schematic diagram of the internal structure of the water inlet tank, the water inlet pipe and the sludge return pipe.

[0017] In the figure: 1. Biological pool body; 2. Selection box; 3. Divider plate; 4. Shield plate; 5. Anaerobic zone; 6. Anoxic zone; 7. Aerobic zone; 8. Support frame; 9. Ventilation pipe; 10. Aeration pipe; 11. Water inlet tank; 12. Water inlet pipe; 13. Sludge return pipe; 14. Water inlet hole; 15. Underwater pusher; 16. Arc guide plate; 17. Air inlet pipe; 18. Water outlet pipe; 19. Sewage inspection well; 20. Connection plate; 21. Water hole; 22. Connection hole. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] See also Figure 1-4 The utility model provides a technical solution: an improved A2O biological pool, comprising a biological pool body 1, a selection frame 2 is fixedly connected to one side of the inner cavity of the biological pool body 1, a water outlet pipe 18 is connected to the other side of the front of the biological pool body 1, a sewage inspection well 19 is arranged at the rear of the biological pool body 1, a partition plate 3 is fixedly connected between the rear of the inner cavity of the biological pool body 1 and the rear of the selection frame 2, a shielding plate 4 is fixedly connected to one side of the partition plate 3, an anaerobic zone 5 is arranged inside the biological pool body 1 and behind the selection frame 2, an aerobic zone 7 and an anoxic zone 6 are respectively arranged on one side of the partition plate 3 and in front and rear of the shielding plate 4, a water through hole 21 is opened at the front and rear of the selection frame 2, a connecting hole 22 is opened on one side of the partition plate 3, a connecting plate 20 is fixedly connected to the top of the inner cavity of the biological pool body 1, a support frame 8 is fixedly installed on the top of the connecting plate 20, a vent pipe 9 is fixedly installed inside the support frame 8, and an aeration pipe 10 is connected to the front and rear of the outer surface of the vent pipe 9.

[0020] Furthermore, in order to facilitate the passage of sewage into the anaerobic zone 5, the aerobic zone 7 and the anoxic zone 6, a water inlet box 11 is fixedly installed on one side of the front of the biological pool body 1, one side of the water inlet box 11 is connected to a water inlet pipe 12, the front of the biological pool body 1 is connected to a sludge return pipe 13, and a water inlet hole 14 is opened at the rear of the water inlet box 11 and the front of the biological pool body 1.

[0021] Furthermore, in order to facilitate the flow and backflow of sewage, a plurality of underwater pushers 15 are provided on the inner wall of the selection frame 2 and one side of the water hole 21, and an arc-shaped guide plate 16 is fixedly connected to the bottom of the inner cavity of the biological pool body 1 and at the front and rear of the baffle 4.

[0022] Furthermore, in order to ventilate the aeration pipe 10 , an air inlet pipe 17 is provided on one side of the biological pond body 1 , and one end of the air inlet pipe 17 is connected to one end of the ventilation pipe 9 .

[0023] It should be noted that one end of the air inlet pipe 17 is connected to the blower in the blower room.

[0024] When in use, sewage and return sludge are added into the water inlet tank 11 through the water inlet pipe 12 and the sludge return pipe 13, and the sewage and sludge flow into the selection frame 2 through the water inlet hole 14, and are pushed by the upper underwater pusher 15 of the selection frame 2, so that the sewage in the selection frame 2 flows into the anaerobic zone 5 through the water through hole 21, and the sewage in the anaerobic zone 5 is pushed by multiple underwater pushers 15, so that the sewage flows back in the anaerobic zone 5, and then flows into the anoxic zone 6 through the connecting hole 22 on the partition plate 3, and the sewage is guided by the arc guide plate 16, and the sewage is pushed by multiple underwater pushers 15 in the anoxic zone 6, so that the sewage flows back in the anoxic zone 6, and then flows into the aerobic zone 7 through multiple underwater pushers 15, and the sewage is pushed by multiple underwater pushers 15 in the aerobic zone 7, so that the sewage flows back in the aerobic zone 7;

[0025] At the same time, the ventilation pipe 9 is ventilated through the air inlet pipe 17, so that the ventilation pipe 9 ventilates the multiple aeration pipes 10, and the multiple aeration pipes 10 aerate the sewage in the biological pool body 1, and then discharge it from the sewage inspection well 19, and the upper layer of clear water in the biological pool body 1 is discharged from the outlet pipe 18.

Claims

1. An improved A2O bio-pond, comprising a bio-pond body (1), characterized in that: A selection frame (2) is fixedly connected to one side of the inner cavity of the biological pond body (1), a partition plate (3) is fixedly connected between the rear part of the inner cavity of the biological pond body (1) and the rear part of the selection frame (2), a shielding plate (4) is fixedly connected to one side of the partition plate (3), an anaerobic zone (5) is arranged inside the biological pond body (1) and behind the selection frame (2), an aerobic zone (7) and an anoxic zone (6) are arranged on one side of the partition plate (3) and in front and rear of the shielding plate (4), a water hole (21) is provided at the front and rear of the selection frame (2), a connection hole (22) is provided at one side of the partition plate (3), a connection plate (20) is fixedly connected to the top of the inner cavity of the biological pond body (1), a support frame (8) is fixedly installed on the top of the connection plate (20), a vent pipe (9) is fixedly installed inside the support frame (8), and an aeration pipe (10) is connected to the front and rear of the outer surface of the vent pipe (9).

2. The improved A2O bio-pond according to claim 1, characterized in that: A water inlet box (11) is fixedly mounted on one side of the front of the biological pond body (1); one side of the water inlet box (11) is connected to a water inlet pipe (12); the front of the biological pond body (1) is connected to a sludge return pipe (13); and a water inlet hole (14) is provided at the rear of the water inlet box (11) and the front of the biological pond body (1).

3. The improved A2O bio-pond according to claim 1, characterized in that: A plurality of underwater pushers (15) are provided on the inner wall of the selection frame (2) and on one side of the water hole (21), and arc-shaped guide plates (16) are fixedly connected to the bottom of the inner cavity of the biological pool body (1) and located in front of and behind the shielding plate (4).

4. The improved A2O bio-pond according to claim 1, characterized in that: An air inlet pipe (17) is provided on one side of the biological pond body (1), and one end of the air inlet pipe (17) is connected to one end of the ventilation pipe (9).

5. The improved A2O bio-pond according to claim 1, characterized in that: The other side of the front portion of the biological pond body (1) is connected to a water outlet pipe (18).

6. The improved A2O bio-pond according to claim 1, characterized in that: A sewage inspection well (19) is provided at the rear of the biological pond body (1).

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