Phosphorus-containing wastewater aerobic and anaerobic treatment system

Abstract

The present invention discloses an aerobic-anaerobic treatment system for phosphorus-containing wastewater, comprising an anaerobic tank and an aerobic tank. The lower portion of the anaerobic tank is provided with an anaerobic tank liquid inlet, the upper portion of the anaerobic tank is provided with an anaerobic tank liquid outlet, the lower portion of the aerobic tank is provided with an aerobic tank liquid inlet, and the anaerobic tank liquid outlet is connected to the aerobic tank liquid inlet. A plurality of partitions are provided in the anaerobic tank, the partitions are located above the anaerobic tank liquid inlet, the four walls of the partitions are fixedly connected to the inner wall of the anaerobic tank, the partitions are provided with water holes, and the water holes are provided with elastic members capable of opening and closing the water holes. When the water pressure below the water holes increases, the elastic members undergo elastic deformation to open the water holes. Compared with the prior art, the four walls of the partitions of the present invention are fixedly connected to the inner wall of the anaerobic tank, sealing the space below the partitions and maintaining the anaerobic space below the partitions, thereby facilitating the rapid conversion of organic matter in the sewage.

Description

Technical Field

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

[0002] Biological phosphorus removal can be used to remove phosphorus from phosphorus-containing wastewater. Biological phosphorus removal utilizes the biochemical action of phosphate-accumulating bacteria to remove phosphorus. The principle is that phosphate-accumulating bacteria can fully release the polyphosphates in their cells under anaerobic conditions, while absorbing phosphorus from the water in excess of their physiological needs under aerobic conditions. This phosphorus-rich sludge is then discharged from the system through sedimentation, achieving the desired effect of removing phosphorus from the wastewater.

[0003] Patent application publication number CN 118255464 A discloses an integrated method for treating liquid, gas, and microbial aerosols of phosphorus-containing wastewater. This method includes: passing the phosphorus-containing wastewater through an anaerobic tank for anaerobic treatment to produce intermediate treated wastewater and a first waste gas; introducing the intermediate treated wastewater into an aerobic tank for aerobic treatment to produce purified water and a second waste gas. The first waste gas is introduced into an electroactive reaction zone. The second waste gas is treated using an adsorbent filler to produce an intermediate purified gas; and the intermediate purified gas is separated using a gas separation membrane assembly to produce oxygen-enriched gas and the remaining gases. Summary of the Invention

[0004] The technical problem solved by the present invention is: based on the existing technology, and improved, to provide an aerobic and anaerobic treatment system for phosphorus-containing wastewater.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: an aerobic and anaerobic treatment system for phosphorus-containing wastewater, comprising an anaerobic tank and an aerobic tank, wherein an anaerobic tank liquid inlet is provided at the lower portion of the anaerobic tank, an anaerobic tank liquid outlet is provided at the upper portion of the anaerobic tank, and an aerobic tank liquid inlet is provided at the lower portion of the aerobic tank, and the anaerobic tank liquid outlet is connected to the aerobic tank liquid inlet; a plurality of partitions are provided in the anaerobic tank, the partitions are located above the anaerobic tank liquid inlet, and the four walls of the partitions are fixedly connected to the inner wall of the anaerobic tank; a water hole is provided on the partition, and an elastic member capable of opening and closing the water hole is provided in the water hole; when the water pressure below the water hole increases, the elastic member undergoes elastic deformation to open the water hole.

[0006] Activated sludge, containing phosphate-accumulating bacteria, is located at the bottom of the anaerobic tank and between the baffles. Phosphorus-containing wastewater enters the anaerobic tank through the tank's liquid inlet. Within the anaerobic tank, phosphate-accumulating bacteria degrade organic matter in the wastewater using nucleoside triphosphates, releasing phosphorus accumulated within their cells. The organic matter in the wastewater provides the carbon source for phosphate-accumulating bacteria's respiration. Under anaerobic conditions, phosphate-accumulating bacteria utilize the organic matter in the wastewater for energy metabolism. Once the phosphate-containing wastewater enters the anaerobic tank, it comes into contact with the activated sludge, rapidly converting the organic matter in the wastewater.

[0007] Compared with the prior art, the four walls of the partition of the present invention are fixedly connected to the inner wall of the anaerobic tank, which seals the space below the partition and maintains the anaerobic space below the partition, which is beneficial to the rapid conversion of organic matter in sewage.

[0008] As sewage is continuously pumped into the space below the bottom baffle, the pressure increases, causing the elastic member to deform and open the water hole. Sewage in the space below the bottom baffle enters the space above it through the water hole. The water pressure in the space above the bottom baffle increases, pushing the water hole of the upper baffle upward. This process continues, gradually opening the water holes of several baffles. The initially purified sewage then flows through the anaerobic tank's liquid outlet into the aerobic tank.

[0009] The elastic member in the water hole of the present invention returns to its original state and closes the water hole when the water pressure below any partition decreases. In this way, oxygen from the gas outlet of the aerobic tank or the anaerobic tank can be effectively prevented from entering the space below the partition, thereby ensuring anaerobic conditions below the partition and improving the sewage purification effect.

[0010] The elastic member comprises a plurality of fan-shaped members disposed in the water hole. All the fan-shaped members in any water hole are assembled into a circle, and the arc-shaped outer edges of the fan-shaped members are fixedly connected to the inner wall of the water hole. When sewage pushes the water hole upward from the bottom, the elastic member warps and deforms upward from the middle of the water hole.

[0011] As an option, the elastic member is a rubber member, and the arc-shaped outer edge of the elastic member is bonded to the inner wall of the water hole.

[0012] A bottom filter layer is provided below the water hole, and the edge of the bottom filter layer is fixed to the partition through a connector. The bottom filter layer blocks the sludge below the partition and allows sewage to pass through the water hole and enter the top of the partition.

[0013] A top filter element is located above the water hole. Its center is arched, and its edges are fixed to the baffle via connectors. The top filter element blocks sludge above the baffle, but allows sewage to pass through. The arched structure provides space for the elastic element to deform.

[0014] An anaerobic tank gas outlet is provided on the top of the anaerobic tank. The gas discharged through the anaerobic tank gas outlet is purified by other equipment, which is not described in the present invention.

[0015] A water pump is provided on the connecting pipe between the liquid outlet of the anaerobic tank and the liquid inlet of the aerobic tank.

[0016] A horizontal plate is arranged in the aerobic pool, with a gap between one edge of the horizontal plate and the inner wall of the aerobic pool. The horizontal plate is located above the liquid inlet of the aerobic pool.

[0017] An aeration pipe is installed in the aerobic tank, and the aeration pipe is located above the horizontal plate. Oxygen-containing gas enters through one end of the aeration pipe and is aerated in the aerobic tank through the aeration holes on the aeration pipe.

[0018] A membrane assembly is provided in the aerobic tank and is located above the aeration pipe.

[0019] The wastewater treated in the anaerobic tank flows through the anaerobic tank outlet, a water pump, and the aerobic tank inlet into the aerobic tank. The wastewater is then directed along the horizontal plates within the aerobic tank to the aeration holes. It then enters the membrane modules within the aerobic tank and is discharged through the aerobic tank outlet to produce purified water. Gases generated during the purification process are discharged through the aerobic tank outlet to other equipment for further treatment, which is not described in this invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the aerobic and anaerobic treatment system for phosphorus-containing wastewater;

[0022] Figure 2 for Figure 1 A schematic diagram of any partition 30;

[0023] Figure 3 for Figure 2 Bottom view of

[0024] Figure 4 for Figure 2 A top view of

[0025] Figure 5 is a partial schematic diagram of the partition 30;

[0026] Figure 6 for Figure 5 Schematic diagram of the central water hole opening.

[0027] Explanation of symbols in the figure:

[0028] 10. Anaerobic tank; 11. Anaerobic tank liquid inlet; 12. Anaerobic tank liquid outlet; 13. Anaerobic tank gas outlet;

[0029] 20. Aerobic tank; 21. Aerobic tank liquid inlet; 22. Water pump; 23. Horizontal plate; 24. Aeration tube; 25. Membrane module; 26. Aerobic tank liquid outlet; 27. Aerobic tank gas outlet;

[0030] 30. Partition; 31. Water hole; 32. Elastic part; 33. Bottom filter layer; 34. Top filter element. DETAILED DESCRIPTION

[0031] like Figure 1 、 Figure 5The aerobic and anaerobic treatment system for phosphorus-containing wastewater includes an anaerobic tank 10 and an aerobic tank 20. The lower part of the anaerobic tank is provided with an anaerobic tank liquid inlet 11, the upper part of the anaerobic tank is provided with an anaerobic tank liquid outlet 12, the lower part of the aerobic tank is provided with an aerobic tank liquid inlet 21, and the anaerobic tank liquid outlet is connected to the aerobic tank liquid inlet; a plurality of partitions 30 are provided in the anaerobic tank, the partitions are located above the anaerobic tank liquid inlet, the four walls of the partitions are fixedly connected to the inner wall of the anaerobic tank, the partitions are provided with water holes 31, and the water holes are provided with elastic parts 32 capable of opening and closing the water holes. When the water pressure below the water holes increases, the elastic parts are elastically deformed to open the water holes.

[0032] like Figure 3 、 Figure 5 、 Figure 6 The elastic member 32 includes a plurality of fan-shaped members arranged in the water hole 31. All the fan-shaped members in any water hole are assembled into a circle, and the arc-shaped outer edge of the fan-shaped member is fixedly connected to the inner wall of the water hole.

[0033] The elastic member 32 is a rubber member, and the arc-shaped outer edge of the elastic member is bonded to the inner wall of the water hole 31 .

[0034] A bottom filter layer 33 is provided below the water hole 31 , and the edge of the bottom filter layer is fixed to the partition plate 30 via a connector.

[0035] A top filter element 34 is provided above the water hole 31 . The middle portion of the top filter element is arched, and the edge of the top filter element is fixed to the partition plate 30 via a connector.

[0036] like Figure 1 The top of the anaerobic tank 10 is provided with an anaerobic tank gas outlet 13.

[0037] A water pump 22 is provided on the connecting pipe between the anaerobic tank liquid outlet 12 and the aerobic tank liquid inlet 21 .

[0038] A horizontal plate 23 is provided in the aerobic pool 20 . A gap is formed between one edge of the horizontal plate and the inner wall of the aerobic pool 20 . The horizontal plate is located above the liquid inlet 21 of the aerobic pool.

[0039] like Figure 1 An aeration pipe 24 is provided in the aerobic pool 20 and is located above the horizontal plate 23 .

[0040] A membrane assembly 25 is provided in the aerobic tank 20 , and the membrane assembly is located above the aeration pipe 24 .

[0041] Activated sludge containing phosphate-accumulating bacteria is located at the bottom of the anaerobic tank 10 and between the partitions 30. Phosphorus-containing wastewater enters the anaerobic tank through the anaerobic tank liquid inlet 11. The phosphate-accumulating bacteria in the anaerobic tank degrade organic matter in the wastewater using nucleoside triphosphates, releasing phosphorus accumulated in the cells. The organic matter in the wastewater provides the carbon source required for the phosphate-accumulating bacteria to respire. Under anaerobic conditions, the phosphate-accumulating bacteria utilize the organic matter in the wastewater for energy metabolism. The phosphorus-containing wastewater enters the anaerobic tank and comes into contact with the activated sludge in the tank, rapidly converting the organic matter in the wastewater.

[0042] As sewage is continuously pumped into the space below the bottom baffle, the pressure in this space increases, causing elastic member 32 to deform and open water holes 31. Sewage in the space below the bottom baffle enters the space above it through the water holes. The increasing water pressure in the space above the bottom baffle pushes the water holes of the upper baffle upward, opening them. This process gradually opens the water holes 31 of several baffles 30, allowing the initially purified sewage to enter the aerobic tank 20 through the anaerobic tank liquid outlet 12.

[0043] The elastic member 32 in the water hole 31 of the present invention returns to its original state and closes the water hole when the water pressure below any partition 30 decreases. In this way, oxygen from the gas outlet 13 of the aerobic tank 20 or the anaerobic tank can be effectively prevented from entering the space below the partition 30, thereby ensuring anaerobic conditions below the partition and improving the sewage purification effect.

[0044] Wastewater treated in anaerobic tank 10 flows through anaerobic tank liquid outlet 12, pump 22, and aerobic tank liquid inlet 21 into aerobic tank 20. The wastewater is then directed along horizontal plates 23 within the aerobic tank to the aeration holes. It then enters membrane modules 25 within the aerobic tank and is discharged through aerobic tank liquid outlet 26 to produce purified water. Gases generated during the purification process are discharged through aerobic tank gas outlet 27 to other equipment for further treatment.

[0045] The above contents are only preferred embodiments 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 methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. An aerobic-anaerobic treatment system for phosphorus-containing wastewater, comprising an anaerobic tank (10) and an aerobic tank (20), wherein the lower portion of the anaerobic tank is provided with an anaerobic tank liquid inlet (11), the upper portion of the anaerobic tank is provided with an anaerobic tank liquid outlet (12), the lower portion of the aerobic tank is provided with an aerobic tank liquid inlet (21), and the anaerobic tank liquid outlet is connected to the aerobic tank liquid inlet; characterized in that: A plurality of partitions (30) are provided in the anaerobic tank. The partitions are located above the liquid inlet of the anaerobic tank. The four walls of the partitions are fixedly connected to the inner wall of the anaerobic tank. The partitions are provided with water holes (31). The water holes are provided with elastic members (32) capable of opening and closing the water holes. When the water pressure below the water holes increases, the elastic members are elastically deformed to open the water holes.

2. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 1, wherein: The elastic member (32) comprises a plurality of sector-shaped members arranged in the water through hole (31), all the sector-shaped members in any water through hole are assembled into a circle, and the arc-shaped outer edges of the sector-shaped members are fixedly connected to the inner wall of the water through hole.

3. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 2, wherein: The elastic member (32) is a rubber member, and the arc-shaped outer edge of the elastic member is bonded to the inner wall of the water hole (31).

4. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 1, wherein: A bottom filter layer (33) is provided below the water hole (31), and the edge of the bottom filter layer is fixed to the partition plate (30) through a connecting piece.

5. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 4, characterized in that: A top filter (34) is provided above the water hole (31), the middle portion of the top filter is arched, and the edge of the top filter is fixed to the partition (30) via a connecting piece.

6. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 1, wherein: The top of the anaerobic tank (10) is provided with an anaerobic tank gas outlet (13).

7. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 1, wherein: A water pump (22) is provided on the connecting pipe between the anaerobic tank liquid outlet (12) and the aerobic tank liquid inlet (21).

8. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 1, wherein: A horizontal plate (23) is provided in the aerobic pool (20), with a gap between one edge of the horizontal plate and the inner wall of the aerobic pool (20), and the horizontal plate is located above the liquid inlet (21) of the aerobic pool.

9. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 8, characterized in that: An aeration pipe (24) is provided in the aerobic tank (20), and the aeration pipe is located above the horizontal plate (23).

10. The aerobic and anaerobic treatment system for phosphorus-containing wastewater according to claim 1, characterized in that: A membrane assembly (25) is provided in the aerobic tank (20), and the membrane assembly is located above the aeration pipe (24).

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