An integrated treatment device compatible with multi-stage AO and A2O

Abstract

This invention relates to an integrated treatment device compatible with multi-stage AO and A2O processes, comprising a vertical reaction cylinder with an anaerobic zone at the bottom and a comprehensive treatment zone above it. The comprehensive treatment zone has a layered structure, with an inner sedimentation zone and an outer anoxic and aerobic zone located on opposite sides of the sedimentation zone. The anoxic zone is divided into several anoxic partitions by several first partitions, and each first partition has an openable first water-passing plate on its inner or outer side. The aerobic zone is divided into several aerobic partitions by several second partitions, and each second partition has an openable second water-passing plate on its inner or outer side. Each anoxic partition is connected to an aerobic partition at a corresponding height via a first water inlet. Each aerobic partition is connected to an anoxic partition above it via a first water pipe.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, specifically relating to an integrated treatment device compatible with multi-stage AO and A2O. Background Technology

[0002] With the development of wastewater treatment technology and equipment, various wastewater treatment processes have been developed in this field, including multi-stage AO and A2O, which have become mainstream wastewater treatment processes. Multi-stage AO in series refers to an AO unit with multiple anoxic and aerobic tanks connected in series. The effluent from the aerobic tank enters the next stage's anoxic tank, and the nitrified liquid from the previous stage completely enters the next stage's anoxic zone for denitrification. This eliminates most of the return equipment, enhances the denitrification effect, and improves denitrification efficiency. A2O is a treatment process that combines anaerobic, anoxic, and aerobic processes in series. The nitrified liquid from the aerobic tank is returned to the anoxic tank, and the sludge from the sedimentation tank is returned to the anoxic tank to replenish the sludge volume.

[0003] Currently, whether it's a wastewater treatment plant consisting of scattered individual tanks, or a rural wastewater treatment plant using an integrated system, or a small wastewater treatment unit added to a factory, the common practice is to select a fixed treatment process based on the characteristics of the wastewater to be treated, and then introduce corresponding microbial communities into each tank or area for wastewater treatment. How to easily and readily modify the treatment equipment so that the same set of equipment can execute two different process routes, achieving flexible application and cost reduction and efficiency improvement, is a problem faced by those skilled in the art. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides an integrated treatment device compatible with multi-stage AO and A2O, comprising a vertical reaction cylinder with an anaerobic zone at the bottom and a comprehensive treatment zone above it. The comprehensive treatment zone has a layered structure, with an inner sedimentation zone and an outer anoxic and aerobic zone, which are located on opposite sides of the sedimentation zone.

[0005] The anoxic zone is divided into several anoxic sections by several first partitions from top to bottom. Each first partition has an openable and closable first water-passing plate on its inner or outer edge. The aerobic zone is divided into several aerobic sections by several second partitions from top to bottom. Each second partition has an openable and closable second water-passing plate on its inner or outer edge.

[0006] Each anoxic zone is connected to the corresponding aerobic zone at a certain height via a first water inlet, which is used to input the water treated in the anoxic zone into the corresponding aerobic zone; each aerobic zone is connected to the anoxic zone above the corresponding anoxic zone via a first water pipe, which is used to input the water treated in the aerobic zone into the next anoxic zone.

[0007] The integrated treatment device of this invention comprises an anoxic zone, an aerobic zone, and a sedimentation zone above the anaerobic zone. The anoxic and aerobic zones are located on both sides of the sedimentation zone, surrounding it internally, thus saving space. The anoxic zone is divided into several equal sections from top to bottom, with a first partition separating adjacent sections. To connect the sections, the first water-passing plates are opened to form a connected anoxic zone. The aerobic zone follows the same design. When implementing a multi-stage AO process, the water-passing plates of the first and second partitions are closed, separating the anoxic and aerobic sections. Through the first water inlet and the first water pipe, water flow is connected between the anoxic section, the aerobic section, the anoxic section above, and the aerobic section above again, achieving an anoxic-aerobic-anoxic-aerobic treatment process. When the A2O process is implemented, the water-passing plates of each of the first and second baffles are opened to form an anoxic zone and an aerobic zone that are connected vertically. The effluent from the anaerobic zone flows through the anoxic zone for treatment, then enters the aerobic zone for treatment, and finally enters the sedimentation zone.

[0008] Optionally, the reaction cylinder is cylindrical, with the anaerobic zone and the sedimentation zone arranged concentrically, and the centers of the anoxic zone and the aerobic zone coinciding with the center of the sedimentation zone;

[0009] Both the anoxic and aerobic zones have semi-circular cross-sections, surrounding the sedimentation zone in the center. The two ends of the anoxic and aerobic zones are connected to each other and separated by vertical sidewalls, making the two ends of the anoxic and aerobic zones closed and not interconnected.

[0010] Optionally, the top of the anaerobic zone is provided with a third partition to separate the anaerobic zone and form a separate chamber; the anaerobic zone is connected to an inlet pipe for inputting raw wastewater; the part of the third partition corresponding to the anoxic zone is provided with a second water outlet to discharge the wastewater treated in the anaerobic zone into the bottom of the anoxic zone; the anaerobic zone contains anaerobic granular sludge.

[0011] Preferably, the second water inlet corresponds to the side of the anoxic zone closest to the sedimentation zone.

[0012] Optionally, the first and second partitions are semi-circular except for the sedimentation area at the center. Several first and second partitions are horizontally arranged, with the side of the first and second partitions closest to the sedimentation area being the inner side and the side furthest from the sedimentation area being the outer side.

[0013] Alternatively, the outer side of the bottom first partition is provided with a first water-passing plate, and the inner side is fixedly connected to the outer wall of the sedimentation zone; the inner side of the next lower first partition is provided with a first water-passing plate, and the outer side is fixedly connected to the inner wall of the anoxic zone; the configuration of the uppermost first partition is the same as that of the bottom first partition, and several first partitions are arranged in this way in an alternating manner, so that the sewage flows in a tortuous manner in the anoxic zone.

[0014] Alternatively, a second water-passing plate is provided on the inner side of the lowest second baffle, and the outer side is fixedly connected to the inner wall of the aerobic zone; a second water-passing plate is provided on the outer side of the next lower second baffle, and the inner side is fixedly connected to the outer wall of the sedimentation zone; the second baffle above is arranged in the same way as the lowest second baffle, and several second baffles are arranged in this way in an alternating manner, so that the sewage flows in a tortuous manner in the aerobic zone.

[0015] Optionally, a plurality of semi-circular first baffles are provided in the hypoxic zone, and the plurality of first baffles are concentrically arranged with the hypoxic zone, with the two ends of the first baffles corresponding to the two ends of the hypoxic zone.

[0016] One end of the first baffle is fixedly connected to the side wall of one end of the anoxic zone, and the other end of the first baffle points to the side wall of the other end of the anoxic zone, leaving a gap between them to allow sewage to flow through, thus realizing the back-and-forth flow of sewage between the two ends of the anoxic zone.

[0017] Optionally, a plurality of semi-circular second baffles are provided in the aerobic zone, and the plurality of second baffles are concentrically arranged with the aerobic zone, with the two ends of the second baffles corresponding to the two ends of the aerobic zone.

[0018] One end of the second baffle is fixedly connected to the side wall of one end of the aerobic zone, and the other end of the second baffle points to the side wall of the other end of the aerobic zone, leaving a gap between them to allow sewage to flow through, thus realizing the back-and-forth flow of sewage between the two ends of the aerobic zone.

[0019] Optionally, the top of the sedimentation zone is provided with an overflow weir, which is connected to an outlet pipe. The outlet pipe extends out of the reaction cylinder to discharge the supernatant from the sedimentation zone. The upper middle part of the sedimentation zone is a separation zone, which is provided with an upper separation plate group and a lower separation plate group from top to bottom to separate the sludge and water from the wastewater input from the aerobic zone.

[0020] The bottom of the sedimentation zone is equipped with a sludge return pipe and a discharge pipe. The sludge return pipe is connected to the inside of the bottom of the anoxic zone, and the discharge pipe extends out of the reaction cylinder to discharge sludge.

[0021] Further optionally, the upper separation plate assembly includes several hollow frustum-shaped wall rings from the inside to the outside, and the wall rings are all concentrically arranged with the top smaller than the bottom and the same height, and the side walls of each wall ring are parallel to each other.

[0022] The lower separation plate assembly comprises several hollow, frustum-shaped wall rings II from the inside out. All wall rings II are concentrically arranged with the top being larger than the bottom, having the same height, and the sidewalls of each wall ring II are parallel to each other. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the integrated processing device that is compatible with multi-level AO and A2O.

[0024] Figure 2 This is a top-down view of the hypoxic and aerobic zones at the bottom.

[0025] Figure 3 This is a schematic diagram of the sedimentation zone.

[0026] In the attached diagram, 1-anaerobic zone, 2-sedimentation zone, 3-anoxic zone, 4-aerobic zone, 5-first baffle, 6-second baffle, 7-anoxic zone, 8-aerobic zone, 9-first water passage plate, 10-second water passage plate, 11-first water inlet, 12-second water inlet, 13-first water pipe, 14-second water pipe, 15-side wall, 16-third baffle, 17-first baffle, 18-second baffle, 19-opening, 20-upper separation plate assembly, 21-lower separation plate assembly, 22-sludge return pipe, 23-wall ring one, 24-wall ring two. Detailed Implementation

[0027] This embodiment provides an integrated processing device compatible with multi-level AO and A2O, such as... Figures 1-3 As shown, it includes a vertical reaction cylinder. The bottom of the reaction cylinder is provided with an anaerobic zone 1. Above the anaerobic zone 1 is a comprehensive treatment zone. The comprehensive treatment zone has a nested structure. The inner layer is a sedimentation zone 2, and the outer layer includes an anoxic zone 3 and an aerobic zone 4. The anoxic zone 3 and the aerobic zone 4 are located on both sides of the sedimentation zone 2.

[0028] The anoxic zone 3 is provided with several first partitions 5 from top to bottom, which divide the anoxic zone 3 into several anoxic zones 7. Each first partition 5 has an openable and closable first water-passing plate 9 on its inner or outer edge. The aerobic zone 4 is provided with several second partitions 6 from top to bottom, which divide the aerobic zone 4 into several aerobic zones 8. Each second partition 6 has an openable and closable second water-passing plate 10 on its inner or outer edge.

[0029] Each anoxic zone 7 is connected to the corresponding aerobic zone 8 at a certain height via a first water inlet 11, which is used to input the water treated in the anoxic zone 7 into the corresponding aerobic zone 8; each aerobic zone 8 is connected to the anoxic zone 7 above the corresponding anoxic zone 7 via a first water pipe 13, which is used to input the water treated in the aerobic zone 8 into the next anoxic zone 7.

[0030] Optionally, the reaction cylinder is cylindrical, with the anaerobic zone 1 and the sedimentation zone 2 arranged concentrically, and the centers of the anoxic zone 3 and the aerobic zone 4 coinciding with the center of the sedimentation zone 2.

[0031] Both the anoxic zone 3 and the aerobic zone 4 have semi-circular cross-sections, surrounding the sedimentation zone 2 at the center. The two ends of the anoxic zone 3 and the aerobic zone 4 are connected to each other and separated by vertical sidewalls 15, ensuring that the two ends of each zone are closed and do not communicate with each other. The heights of the anaerobic zone and the integrated treatment zone are adjusted according to the actual wastewater treatment requirements.

[0032] Optionally, the top of the anaerobic zone 1 is provided with a third partition 16 to separate the anaerobic zone 1 and form a separate chamber; the anaerobic zone 1 is connected to an inlet pipe for inputting raw wastewater; the part of the third partition 16 corresponding to the anoxic zone 3 is provided with a second water inlet 12 to discharge the wastewater treated in the anaerobic zone 1 into the bottom of the anoxic zone 3; the anaerobic zone 1 contains anaerobic granular sludge.

[0033] Preferably, the second water inlet 12 corresponds to the side of the anoxic zone 3 that is close to the sedimentation zone 2.

[0034] Optionally, the first partition 5 and the second partition 6 are semi-circular except for the sedimentation area at the center. Several first partitions 5 and second partitions 6 are horizontally arranged. The side of the first partition 5 and the second partition 6 closest to the sedimentation area 2 is the inner side, and the side away from the sedimentation area 2 is the outer side.

[0035] Alternatively, the outer side of the bottommost first partition 5 is provided with a first water-passing plate 9, and the inner side is fixedly connected to the outer wall of the sedimentation zone 2; the inner side of the next lower first partition 5 is provided with a first water-passing plate 9, and the outer side is fixedly connected to the inner wall of the anoxic zone 3; the arrangement of the uppermost first partition 5 is the same as that of the bottommost first partition 5, and several first partitions 5 are arranged in this way in an alternating manner, so that the sewage flows in a tortuous manner in the anoxic zone 3.

[0036] Alternatively, the inner side of the lowest second partition 6 is provided with a second water-passing plate 10, and the outer side is fixedly connected to the inner wall of the aerobic zone 4; the outer side of the next lower second partition 6 is provided with a second water-passing plate 10, and the inner side is fixedly connected to the outer wall of the sedimentation zone 2; the arrangement of the uppermost second partition 6 is the same as that of the lowest second partition 6, and several second partitions 6 are arranged in this way in an alternating manner, so that the sewage flows in a tortuous manner in the aerobic zone 4.

[0037] The anoxic zone 7 and the corresponding aerobic zone 8 at the same height are a pair of anoxic zones 7 and aerobic zones 8 at the same height. When a multi-stage AO process is implemented, the anoxic zone 7 is connected to the aerobic zone 8 at the same height, and the aerobic zone 8 is then connected to the anoxic zone 7 above it, realizing anoxic-aerobic-anoxic treatment.

[0038] Optionally, a plurality of semi-circular first baffles 17 are provided in the hypoxia zone 7, and the plurality of first baffles 17 are concentrically arranged with the hypoxia zone 7, with the two ends of the first baffles 17 corresponding to the two ends of the hypoxia zone 7.

[0039] One end of the first baffle 17 is fixedly connected to the side wall of one end of the anoxic zone 7, and the other end of the first baffle 17 points to the side wall of the other end of the anoxic zone 7, leaving a gap with the side wall of the other end of the anoxic zone 7 to allow sewage to flow through, thereby realizing the back-and-forth flow of sewage between the two ends of the anoxic zone 7.

[0040] Optionally, a plurality of semi-circular second baffles 18 are provided in the aerobic zone 8, and the plurality of second baffles 18 are concentrically arranged with the aerobic zone 8, with the two ends of the second baffles 18 corresponding to the two ends of the aerobic zone 8.

[0041] One end of the second baffle 18 is fixedly connected to the side wall of one end of the aerobic zone 8, and the other end of the second baffle 18 points to the side wall of the other end of the aerobic zone 8, leaving a gap with the side wall of the other end of the aerobic zone 8 to allow sewage to flow through, thereby realizing the back-and-forth flow of sewage between the two ends of the aerobic zone 8.

[0042] Optionally, the first water inlet 11 is located on the side wall 15 at any end near the outside of the anoxic zone 7, which can connect and guide the sewage flowing to the outside of the anoxic zone 7 to the outside of the aerobic zone 8 at the corresponding height.

[0043] Optionally, the first water pipe 13 is located on the side wall 15 at any end near the inner side of the aerobic zone 8, and extends upward to the side wall of the anoxic zone 7 above the corresponding height, so as to connect and guide the sewage flowing to the inner side of the aerobic zone 8 to the inner side of the anoxic zone 7 above, thereby realizing the connection between the aerobic zone 8 and the anoxic zone 7 above.

[0044] Preferably, the number of hypoxic zones 7 and aerobic zones 8 is the same, and both are odd numbers.

[0045] The present invention achieves internal partitioning of the anoxic zone 3 through a plurality of first baffles 5 and internal partitioning of the aerobic zone 4 through a plurality of second baffles 6; achieves deflected flow of sewage in the anoxic zone 3 through a plurality of first water-passing plates 9 and deflected flow of sewage in the aerobic zone 4 through a plurality of second water-passing plates 10; achieves deflected flow of sewage in the anoxic zone 7 through a first deflecting baffle 17 and deflected flow of sewage in the aerobic zone 8 through a second deflecting baffle 18.

[0046] Specifically, when implementing a multi-stage AO process, both the first water inlet plate 9 and the second water inlet plate 10 are completely closed. Wastewater treated in the anaerobic zone 1 enters the lowermost anoxic zone 7 near its inner side (near the sedimentation zone 2) through the second water inlet 12, then flows along several first baffles 17 for anoxic treatment; until the wastewater reaches the outside of the anoxic zone 7, it flows through the first water inlet 11 into the outside of the lowermost aerobic zone 8, then flows along several second baffles 18 for aerobic treatment; until the wastewater reaches the outside of the anoxic zone 7, it flows through the first water inlet 11 into the outside of the lowermost aerobic zone 8, and then flows along several second baffles 18 for aerobic treatment; until the wastewater reaches the outside of the anoxic zone 7... Water flows to the inside of the aerobic zone 8, then flows into the inside of the next lower anoxic zone 7 through the first water pipe 13, and then flows along several first baffles 17 for anoxic treatment; until the sewage flows to the outside of the next lower anoxic zone 7, then flows into the outside of the next lower aerobic zone 8 through the first water outlet 11, and then flows along several second baffles 18 for aerobic treatment; this process is repeated, in the anoxic zone 7, the sewage flows from the inside to the outside through baffles, and in the aerobic zone 8, the sewage flows from the outside to the inside through baffles.

[0047] When implementing the A2O process, both the first water inlet plate 9 and the second water inlet plate 10 are fully open. Wastewater treated in anaerobic zone 1 enters the lowermost anoxic zone 7 near its inner side (near sedimentation zone 2) through the second water inlet 12. It then flows along several first baffles 17 for anoxic treatment. This continues until the wastewater reaches the outer side of the anoxic zone 7, then flows through the first water inlet plate 9 to the outer side of the next lower anoxic zone 7, and then flows along several first baffles 17 again until it reaches the inner side of the next lower anoxic zone 7. This process is repeated for each anoxic zone 7 until it reaches the uppermost anoxic zone 7. When there is an odd number of anoxic zones 7, the uppermost... The wastewater in the anoxic zone 7 flows from the inside to the outside, and is fed into the outer side of the uppermost aerobic zone 8 through the first inlet 11. Then, within this aerobic zone 8, it flows from the outside to the inside along several second baffles 18 for aerobic treatment. This continues until the wastewater reaches the inside of the aerobic zone 8, then flows into the inner side of the next uppermost aerobic zone 8 through the second inlet 10, and then flows along several second baffles 18 again until it reaches the outer side of the next uppermost aerobic zone 8. This process is repeated for each aerobic zone 8. When there is an odd number of aerobic zones 8, the wastewater in the lowermost aerobic zone 8 also flows from the outside to the inside. Regarding the nitrification liquid recirculation, the first inlet pipe 13 of one or more aerobic zones 8 continuously or intermittently recirculates the nitrification liquid to the connected anoxic zone 7.

[0048] Optionally, a second water pipe 14 is provided on the inner wall of the sedimentation zone 2 near the aerobic zone 4. The top end of the second water pipe 14 is connected to the inner side of the uppermost aerobic zone 8, and the bottom end is connected to the inner side of the lowermost aerobic zone 8. An opening 19 is provided on the second water pipe 14 at the lower part of the sedimentation zone 2 to discharge the water treated by the uppermost aerobic zone 8 (multi-stage AO process) or the lowermost aerobic zone 8 (A2O process) into the sedimentation zone 2.

[0049] Optionally, the top of the sedimentation zone 2 is provided with an overflow weir, which is connected to an outlet pipe. The outlet pipe extends out of the reaction cylinder and is used to discharge the supernatant of the sedimentation zone 2. The middle and upper part of the sedimentation zone 2 is a separation zone, in which an upper separation plate group 20 and a lower separation plate group 21 are provided from top to bottom for separating the sludge and water from the wastewater input into the aerobic zone 4.

[0050] The bottom of the sedimentation zone 2 is equipped with a sludge return pipe 22 and a discharge pipe. The sludge return pipe 22 is connected to the inner side of the bottom of the anoxic zone 3, and the discharge pipe extends out of the reaction cylinder to discharge sludge.

[0051] Further optionally, the upper separation plate assembly 20 includes a number of hollow frustum-shaped wall rings 23 from the inside to the outside, and the wall rings 23 are all concentrically arranged with the upper part smaller than the lower part and the same height, and the side walls of each wall ring 23 are parallel to each other.

[0052] The lower separation plate assembly 21 includes several hollow frustum-shaped wall rings 24 from the inside to the outside. All wall rings 24 are larger at the top and smaller at the bottom, have the same height, and are concentrically arranged. The side walls of each wall ring 24 are parallel to each other.

[0053] Preferably, the number of wall rings 23 in the upper separation plate group 20 is equal to the number of wall rings 24 in the lower separation plate group 21, and the wall rings 23 and 24 are concentrically arranged; the bottom diameter of the corresponding wall rings 23 and 24 is slightly smaller than the top diameter of the wall ring 24, so that most of the sludge sliding down the outer side of the wall ring 23 can fall onto the inner side of the corresponding wall ring 24 below and continue to slide down.

[0054] Traditional sedimentation zones 2 / tanks typically employ inclined plate separation. However, simple straight inclined plates are not well-suited to the cylindrical sedimentation zone 2 of this invention. Therefore, this invention designs the upper separation plate assembly 20 and the lower separation plate assembly 21. Both wall rings 23 and 24 are hollow frustum shapes, compatible with the cylindrical shape of the sedimentation zone 2. The lower separation plate assembly 21 is generally wider at the top and narrower at the bottom, while the upper separation plate assembly 20 is narrower at the top and wider at the bottom. This reduces the water flow velocity through the lower separation plate assembly 21, preventing excessive impact on the sludge sliding down from the upper separation plate assembly 20. This allows the sludge to continue falling in a slower water flow. As the sludge adheres and agglomerates during its descent, its mass increases, allowing it to resist the slightly faster water flow and continue settling when it reaches the bottom of the lower separation plate assembly 21. Furthermore, the top-to-bottom shape of the lower separation plate assembly 21 also facilitates sludge collection.

[0055] The first water inlet 11, the first water pipe 13, and the second water inlet 12 described in this invention are all equipped with valves, which are controlled by an external control device to open and close. The first water inlet plate 9 and the second water inlet plate 10 can adopt conventional opening and closing forms and sealing forms.

Claims

1. An integrated treatment device compatible with multi-stage AO and A2O, characterized in that, The reaction cylinder comprises a vertical reaction cylinder, the bottom of the reaction cylinder is provided with an anaerobic zone, the upper part of the anaerobic zone is a comprehensive treatment zone, the comprehensive treatment zone is a sleeve structure, the inner layer is a sedimentation zone, and the outer layer comprises an anoxic zone and an aerobic zone, and the anoxic zone and the aerobic zone are respectively arranged on the two sides of the sedimentation zone; The anoxic zone is provided with a plurality of first partitions from top to bottom, and the anoxic zone is equally divided into a plurality of anoxic sub-zones, the inner side edge or the outer side edge of each first partition is provided with a first water passing plate which can be opened and closed; the aerobic zone is provided with a plurality of second partitions from top to bottom, and the aerobic zone is equally divided into a plurality of aerobic sub-zones, the inner side edge or the outer side edge of each second partition is provided with a second water passing plate which can be opened and closed; Each anoxic sub-zone is communicated with the corresponding height aerobic sub-zone through a first water passing port for inputting the water body treated in the anoxic sub-zone into the corresponding aerobic sub-zone; each aerobic sub-zone is communicated with the corresponding height anoxic sub-zone above through a first water passing pipe for inputting the water body treated in the aerobic sub-zone into the next anoxic sub-zone; The reaction cylinder is a cylinder, the anaerobic zone and the sedimentation zone are concentrically arranged, and the centers of the anoxic zone and the aerobic zone coincide with the center of the sedimentation zone; The cross sections of the anoxic zone and the aerobic zone are both semicircular annular, the anoxic zone and the aerobic zone surround the sedimentation zone in the center, and the two ends of the anoxic zone and the aerobic zone are respectively sealed and not communicated with each other through the vertical side walls. The top of the anaerobic zone is provided with a third partition, the part of the third partition corresponding to the anoxic zone is provided with a second water passing port, and the sewage treated in the anaerobic zone is discharged into the bottom of the anoxic zone; the second water passing port corresponds to the side of the anoxic zone close to the sedimentation zone; The side close to the sedimentation zone of the first partition and the second partition is the inner side, and the side away from the sedimentation zone is the outer side; The outer side of the lowermost first partition is provided with a first water passing plate, and the inner side is fixedly connected with the outer wall of the sedimentation zone; the inner side of the second lowermost first partition is provided with a first water passing plate, and the outer side is fixedly connected with the inner wall of the anoxic zone; a plurality of first partitions are alternately arranged in this way, so that the sewage forms a zigzag flow in the anoxic zone; The inner side of the lowermost second partition is provided with a second water passing plate, and the outer side is fixedly connected with the inner wall of the aerobic zone; the outer side of the second lowermost second partition is provided with a second water passing plate, and the inner side is fixedly connected with the outer wall of the sedimentation zone; a plurality of second partitions are alternately arranged in this way, so that the sewage forms a zigzag flow in the aerobic zone.

2. The integrated treatment device compatible with multi-stage AO and A2O according to claim 1, characterized in that, The anaerobic zone is connected with a water inlet pipe for inputting raw sewage; the anaerobic zone has anaerobic granular sludge.

3. The integrated treatment device compatible with multi-stage AO and A2O of claim 1, wherein, The plurality of first partitions and the plurality of second partitions are all horizontally arranged.

4. The integrated treatment device compatible with multi-stage AO and A2O of claim 1, wherein, A plurality of semicircular first baffles are arranged in the anoxic sub-zone, the plurality of first baffles are concentrically arranged with the anoxic sub-zone, and the two ends of the first baffle correspond to the two ends of the anoxic sub-zone. One end of the first baffle is fixedly connected with the side wall of one end of the anoxic sub-zone, the other end of the first baffle points to the side wall of the other end of the anoxic sub-zone and leaves a gap with the side wall of the other end of the anoxic sub-zone, allowing the sewage to flow through, realizing the zigzag flow of the sewage between the two ends of the anoxic sub-zone.

5. The integrated treatment device compatible with multi-stage AO and A2O of claim 4, wherein, The second baffle plates are fixedly connected to the side walls of the two ends of the aerobic partition, and the other ends of the second baffle plates are directed to the side walls of the other ends of the aerobic partition and leave gaps with the side walls of the other ends of the aerobic partition, so that the sewage can flow through the gaps and flow back and forth between the two ends of the aerobic partition. The top of the precipitation zone is provided with an overflow weir connected to a water outlet pipe which penetrates the reaction cylinder and is used for discharging supernatant of the precipitation zone; the middle and upper part of the precipitation zone is a separation zone provided with an upper separation plate group and a lower separation plate group from top to bottom, which is used for separating sludge and water of the sewage input from the aerobic zone; 6. The integrated treatment device compatible with multi-stage AO and AnO of claim 1, wherein, The bottom of the precipitation zone is provided with a sludge backflow pipe connected to the inner side of the bottom of the anoxic zone and a sludge discharge pipe penetrating the reaction cylinder and discharging sludge. The upper separation plate group comprises a plurality of hollow wall rings one in the shape of a circular truncated cone, and the wall rings one are concentrically arranged with the same height and gradually increasing from top to bottom, and the side walls of the wall rings one are parallel to each other.

7. The integrated treatment device compatible with multi-stage AO and A2O of claim 6, wherein, The lower separation plate group comprises a plurality of hollow wall rings two in the shape of a circular truncated cone, and the wall rings two are concentrically arranged with the same height and gradually decreasing from top to bottom, and the side walls of the wall rings two are parallel to each other. ​

Images