Lateral flow aerobic granular sludge device

Abstract

The invention relates to the technical field of sewage treatment, and provides a side-flow aerobic granular sludge device, which comprises: a body, the interior of which is at least provided with an anoxic zone and an aerobic zone; the upstream runner area of the aerobic zone is smaller than the downstream runner area; the inlet of the aerobic zone is communicated with the outlet of the anoxic zone, the outlet of the aerobic zone is divided into a first branch and a second branch, the first branch is communicated with the anoxic zone, and the second branch is communicated with the downstream process zone of the aerobic zone. According to the side-flow aerobic granular sludge device, a pump body does not need to be matched with a pipeline for nitrification liquid backflow, energy conservation and environmental protection are facilitated, and the burden of system maintenance is not increased. Moreover, during use, nitrification liquid and raw water are mixed at the upper part of the anoxic zone by utilizing disturbance of rising of tail gas of the aerobic zone, rise at the upper section of the anoxic zone, then fall back and are continuously stirred and mixed, so that the space utilization rate in the body is increased, the retention time of a water body can be effectively prolonged, and the sewage treatment effect is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a side-flow aerobic granular sludge device. Background Technology

[0002] Existing aerobic reactors mainly consist of an anoxic zone, an aerobic zone, and a sedimentation zone arranged sequentially along the wastewater flow path. Raw wastewater enters the anoxic zone, where it is diluted and mixed with microorganisms for anoxic reaction. The wastewater then enters the aerobic zone for further aerobic reaction to remove pollutants. Finally, the wastewater enters the sedimentation zone for sedimentation and separation. The downstream aerobic zone contains a large amount of nitrified liquid; therefore, this nitrified liquid can be transported back to the upstream anoxic zone for denitrification to remove total nitrogen from the wastewater. Current technologies typically use pumps and pipelines for nitrified liquid recirculation; however, this design is not energy-efficient and environmentally friendly, and it increases the burden of system maintenance. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that the traditional aerobic reaction device uses a pump body and pipeline for nitrification liquid reflux. However, such a design is not conducive to energy saving and environmental protection and will increase the burden of system maintenance. Therefore, a side-flow aerobic granular sludge device is provided.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] This invention provides a side-flow aerobic granular sludge device, comprising: a main body, the interior of which is provided with at least an anoxic zone and an aerobic zone arranged along a water flow path; the upstream flow channel area of ​​the aerobic zone is smaller than the downstream flow channel area, and an aeration device is provided in the upstream flow channel of the aerobic zone; the inlet of the aerobic zone is connected to the outlet of the anoxic zone, and the outlet of the aerobic zone is divided into a first branch and a second branch, the first branch being connected to the anoxic zone, and the second branch being used to connect to the downstream process area of ​​the aerobic zone; wherein, the anoxic zone is connected to an external wastewater source, and the external wastewater enters the anoxic zone and flows to the aerobic zone; under the action of the aeration device, the aerobic zone utilizes the air lift effect generated by the rising gas to transport the nitrified liquid in the aerobic zone to the anoxic zone via the first branch.

[0006] Furthermore, the upstream channel of the aerobic zone includes a premixing section and a speed-maintaining section connected together, and the speed-maintaining section is located downstream of the premixing section; the channel area of ​​the premixing section gradually decreases along the direction close to the speed-maintaining section, and the aeration device is installed in the premixing section; a gap is left between the end of the premixing section away from the speed-maintaining section and the bottom of the main body, so that the water in the anoxic zone can enter the aerobic zone.

[0007] Furthermore, a first opening is provided between the aerobic zone and the anoxic zone, through which a portion of the sludge in the aerobic zone enters the anoxic zone.

[0008] Furthermore, an annular degassing channel and a sludge suspension zone are also provided along the water flow path within the main body; the annular degassing channel is located downstream of the aerobic zone, and the inlet of the annular degassing channel is connected to the second branch; the outlet of the annular degassing channel is divided into a third branch and a fourth branch, a portion of the water in the annular degassing channel enters the sludge suspension zone through the third branch, and another portion of the water in the annular degassing channel flows back to the aerobic zone through the fourth branch.

[0009] Furthermore, the main body is a vertical tank-shaped structure with a circular or square cross-section. The anoxic zone, aerobic zone, annular degassing channel, and sludge suspension zone are concentrically distributed within the main body, and from the inside out, they are the sludge suspension zone, annular degassing channel, aerobic zone, and anoxic zone, respectively.

[0010] Furthermore, a sedimentation zone is provided along the water flow path within the body of the structure. The sedimentation zone is located downstream of the sludge suspension zone, and the inlet of the sedimentation zone is connected to the outlet of the sludge suspension zone.

[0011] Furthermore, the side-flow aerobic granular sludge device also includes a water distribution chamber disposed within the main body, and the water distribution chamber is arranged in a ring around the circumference of the anoxic zone. The inlet of the water distribution chamber is adapted to be connected to an external sewage source, and the outlet of the water distribution chamber is connected to the anoxic zone. The water distribution chamber transports water to the anoxic zone through a ring-shaped water distribution method.

[0012] Furthermore, the side-flow aerobic granular sludge device also includes an inlet jet, an inlet pipe, and a sludge return pipe; one end of the inlet jet is connected to the wastewater source, and the other end extends into the inlet pipe; the end of the inlet pipe away from the inlet jet is connected to the water distribution chamber; one end of the sludge return pipe is connected to the inlet pipe, and the other end is connected to the sludge suspension zone, so as to use negative pressure to transport the heavy sludge in the sludge suspension zone to the anoxic zone.

[0013] Furthermore, the side-flow aerobic granular sludge device also includes a light sludge collection hopper and a light sludge discharge pipe; the light sludge collection hopper is located in the sedimentation zone or the sludge suspension zone and is used to collect light sludge in the sedimentation zone or the sludge suspension zone; one end of the light sludge discharge pipe is connected to the light sludge collection hopper and the other end is connected to the inlet pipe, so as to use negative pressure to transport the light sludge in the sludge suspension zone to the anoxic zone.

[0014] Furthermore, the inlet pipe is located within the sludge suspension zone, and the inlet pipe is connected to the water distribution chamber via a first inlet branch pipe.

[0015] Further, the aeration device includes: an aerator disposed in the aerobic zone; a premixing hood covering the air outlet of the aerator, the space between the premixing hood and the aerator forming a first premixing zone; a gap is left between the premixing hood and the aerator to form a return water inlet, the return water inlet connecting the first premixing zone with the space outside the first premixing zone; wherein, the flow area of ​​the release port of the premixing hood is smaller than the flow area of ​​the inlet of the premixing hood, so as to increase the pressure in the first premixing zone under aeration conditions.

[0016] Furthermore, the aeration device also includes a rectifier shroud covering the release port of the premixing shroud. The end of the rectifier shroud away from the premixing shroud is a sealed structure, and the inner diameter of the rectifier shroud gradually decreases in the direction away from the premixing shroud. The space between the rectifier shroud and the premixing shroud forms a second premixing zone. A gap is left between the rectifier shroud and the premixing shroud to form a diversion port, which connects the second premixing zone with the space outside the second premixing zone.

[0017] Furthermore, the fairing has a plurality of toothed openings along its circumferential edge.

[0018] Furthermore, the aeration device also includes a speed-maintaining component disposed between the premixing hood and the rectifier hood, and the end of the speed-maintaining component away from the rectifier hood is connected to the release port of the premixing hood.

[0019] Furthermore, the aeration device also includes a baffle plate disposed inside the shroud, with the baffle plate surface facing the outlet of the speed-maintaining component.

[0020] Furthermore, the aeration device also includes a speed-maintaining component; one end of the speed-maintaining component is connected to the release port of the premixing hood, and the other end extends in a direction away from the premixing hood.

[0021] The technical solution of this invention has the following advantages:

[0022] The side-flow aerobic granular sludge device provided by this invention utilizes the airlift effect generated by the rising gas in the aerobic zone to transport the nitrified liquid in the aerobic zone to the anoxic zone via a first branch. This design eliminates the need for pumps and pipelines for nitrified liquid recirculation, promoting energy conservation and environmental protection without increasing system maintenance burden. Furthermore, during operation, the nitrified liquid and raw water mix in the upper part of the anoxic zone due to the disturbance caused by the rising exhaust gas in the aerobic zone. The mixture rises in the upper section of the anoxic zone and then falls back, continuously agitating and mixing, improving the space utilization within the device and effectively extending the water retention time, thus enhancing wastewater treatment efficiency. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a side-flow aerobic granular sludge device according to one embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the first water passage in a side-flow aerobic granular sludge device according to one embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the second water passage in a side-flow aerobic granular sludge device according to one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of a swirl guide plate in a side-flow aerobic granular sludge device according to one embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the effluent tank in a side-flow aerobic granular sludge device according to one embodiment of the present invention.

[0030] Figure 7 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the anoxic zone in a side-flow aerobic granular sludge device according to one embodiment of the present invention;

[0035] Figure 12 This is a schematic diagram of the main body of the side-flow aerobic granular sludge device in another embodiment of the present invention;

[0036] Figure 13 This is a schematic diagram of the side-flow aerobic granular sludge device used in combination according to one embodiment of the present invention;

[0037] Figure 14 for Figure 13 A schematic diagram of one of the deployment methods when the side-flow aerobic granular sludge unit is used in combination.

[0038] Figure 15 This is a schematic diagram of the side-flow aerobic granular sludge device used in combination in another embodiment of the present invention;

[0039] Figure 16 for Figure 15 A schematic diagram showing the location of the side collection hopper;

[0040] Figure 17 for Figure 15 A schematic diagram of one of the deployment methods when the side-flow aerobic granular sludge unit is used in combination.

[0041] Figure 18 This is a schematic diagram of the side-flow aerobic granular sludge device in another embodiment of the present invention when the annular degassing channel does not recirculate back to the aerobic zone.

[0042] Figure 19 for Figure 18 A schematic diagram of the sludge discharge pipes installed in the intermediate aerobic zone;

[0043] Figure 20 This is a schematic diagram of the side-flow aerobic granular sludge device in another embodiment of the present invention, in which the annular degassing channel adopts a bucket reflux method to reflux the aerobic zone.

[0044] Figure 21 for Figure 20 A schematic diagram of the distribution of reflux holes;

[0045] Figure 22 This is a schematic diagram of an aeration device according to one embodiment of the present invention;

[0046] Figure 23 This is a schematic diagram of an aeration device in another embodiment of the present invention;

[0047] Figure 24 This is a schematic diagram of an aeration device in another embodiment of the present invention;

[0048] Figure 25 This is a schematic diagram of an aeration device in another embodiment of the present invention;

[0049] Figure 26 This is a schematic diagram of an aeration device in another embodiment of the present invention;

[0050] Figure 27 This is a schematic diagram of the aerator layout in one embodiment of the present invention;

[0051] Figure 28 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0052] Figure 29 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention;

[0053] Figure 30 This is a schematic diagram of a side-flow aerobic granular sludge device in another embodiment of the present invention.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Main body; 2. Anoxic zone; 3. Aerobic zone; 4. Annular degassing channel; 5. Sludge suspension zone; 6. First annular component; 7. Second annular component; 8. Third annular component; 9. First notch; 10. Second notch; 11. Third notch; 12. Fourth notch; 13. First opening; 14. Second opening; 15. Aeration device; 16. Water distribution tank; 17. First water passage hole; 18. First pipe body; 19. Second pipe body; 20. Inlet jet; 21. Premixing section; 22. Speed-maintaining section; 23. Sludge return pipe; 24. Light sludge collection hopper; 25. Light sludge discharge pipe; 26. Sludge discharge pipe; 27. Empty pipe; 28. Outlet 29. Water tank; 30. Outlet pipe; 31. Second water passage hole; 32. Swirl guide plate; 33. Sedimentation zone; 34. Gas collection hood; 35. Gas collection pipe; 36. Exhaust pipe; 37. Cylinder; 38. Inclined tube separation device; 39. First inlet branch pipe; 40. Reverse cone; 41. Sewage treatment tank; 42. Main inlet pipe; 43. Second inlet branch pipe; 44. Side collection hopper; 45. Aerator; 46. Premixing hood; 47. First premixing zone; 48. Return water outlet; 49. Rectifier hood; 50. Second premixing zone; 51. Speed-maintaining component; 52. Baffle; 53. Toothed inlet; 54. Diverter; 55. Annular inlet pipe; 56. Drainage plate. Detailed Implementation

[0056] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] like Figure 1 As shown, this embodiment provides a side-flow aerobic granular sludge device, including a body 1. For example, the body 1 can be a vertical tank-like structure with a circular cross-section. The body 1 is provided with concentrically distributed anoxic zone 2, aerobic zone 3, an annular degassing channel 4, and sludge suspension zone 5, which are arranged from the inside to the outside as follows: sludge suspension zone 5, annular degassing channel 4, aerobic zone 3, and anoxic zone 2. The cross-sectional shape of the body 1 is not limited to a circle, but can also be square, hexagonal, or other polygonal.

[0061] Specifically, the main body 1 is provided with a first annular component 6, and the area between the first annular component 6 and the inner wall of the main body 1 forms a cylindrical anoxic zone 2. The main body 1 is also provided with a second annular component 7, which is located within the first annular component 6, and the area between the second annular component 7 and the first annular component 6 forms a cylindrical aerobic zone 3. The main body 1 is also provided with a third annular component 8, which is located within the second annular component 7, and the area between the third annular component 8 and the second annular component 7 forms a cylindrical annular degassing channel 4. The inner aerobic zone 3 of the third annular component 8 forms a cylindrical sludge suspension zone 5.

[0062] The outlet of anoxic zone 2 is connected to the inlet of aerobic zone 3. After flowing through anoxic zone 2, the water enters the downstream aerobic zone 3. The outlet of aerobic zone 3 is connected to the inlet of annular degassing channel 4. After flowing through aerobic zone 3, the water enters the downstream annular degassing channel 4. The outlet of annular degassing channel 4 is connected to the inlet of sludge suspension zone 5. After flowing through annular degassing channel 4, the water enters the downstream sludge suspension zone 5.

[0063] Specifically, for the anoxic zone 2 and the aerobic zone 3, a first opening 13 can be provided on the side wall of the first annular component 6. The first opening 13 can be located on the side wall of the first annular component 6 near the top of the main body 1. During the rise of water in the aerobic zone 3, a portion of the water can flow back into the anoxic zone 2 through the first opening 13. This arrangement allows a portion of the sludge in the aerobic zone 3 to flow back into the anoxic zone 2, promoting the overflow of more nitrifying liquid from the first gap 9 into the anoxic zone 2.

[0064] Furthermore, a first gap 9 is left between the top of the first annular component 6 and the top wall of the main body 1. When the nitrifying liquid corresponding to the first branch in the aerobic zone 3 rises to the top of the aerobic zone 3, it can cross the first annular component 6 and flow into the anoxic zone 2 through the first gap 9. A second gap 10 is left between the bottom of the first annular component 6 and the bottom wall of the main body 1. When the water in the anoxic zone 2 falls to the bottom of the anoxic zone 2, the water can cross the first annular component 6 and flow into the aerobic zone 3 through the second gap 10.

[0065] Specifically, for aerobic zone 3, the lower half of aerobic zone 3 can be recessed towards the center of aerobic zone 3, so that the upstream flow channel area of ​​aerobic zone 3 is smaller than the downstream flow channel area. Further, the upstream flow channel of aerobic zone 3 includes a connected premixing section 21 and a speed-maintaining section 22, with the speed-maintaining section 22 located downstream of the premixing section 21. The flow channel area of ​​the premixing section 21 gradually decreases along the direction close to the speed-maintaining section 22. For example, the premixing section 21 can be designed as a conical structure, and the aeration device 15 is installed within the premixing section 21. A second gap 10 and a fourth gap 12 are left between the end of the premixing section 21 away from the speed-maintaining section 22 and the bottom wall of the main body 1, so that water from the anoxic zone 2 and the annular deaeration channel 4 can enter the aerobic zone 3. In particular, the downstream channel of the aerobic zone 3 is equipped with several aeration devices 15. Under the action of air lifting, the nitrified liquid in the aerobic zone 3 is transported to the anoxic zone 2 through the first branch and the first gap 9. Moreover, the water flow velocity in the upstream of the aerobic zone 3 is high and the flow velocity in the downstream is low, so that the raw water entering the aerobic zone 3 is quickly mixed and rises, and then undergoes comprehensive treatment in the low-velocity zone in the middle and upper part, which is conducive to improving the sewage treatment effect.

[0066] The side-flow aerobic granular sludge device provided in this embodiment utilizes the airlift effect generated by the rising gas in the aerobic zone 3 to transport the nitrified liquid in the aerobic zone 3 to the anoxic zone 2 via the first branch. This configuration eliminates the need for pumps and pipelines for nitrified liquid recirculation, promoting energy conservation and environmental protection without increasing system maintenance burden. Furthermore, during operation, the nitrified liquid and raw water are mixed in the upper part of the anoxic zone 2 (the area above the first gap 9) by the disturbance caused by the rising exhaust gas in the aerobic zone 3. The mixture rises and falls in the upper section of the anoxic zone 2, continuously agitating and mixing, improving the space utilization within the main body 1 and effectively extending the water retention time, thus enhancing wastewater treatment efficiency.

[0067] Specifically, for aerobic zone 3, a third gap 11 is left between the top of the second annular component 7 and the top wall of the main body 1. When the water corresponding to the second branch in aerobic zone 3 rises to the top of aerobic zone 3, it can climb over the second annular component 7 and flow through the third gap 11 to the annular degassing channel 4. A fourth gap 12 is left between the bottom of the second annular component 7 and the bottom wall of the main body 1. When the water corresponding to the fourth branch in annular degassing channel 4 falls to the bottom of annular degassing channel 4, it can climb over the second annular component 7 and flow through the fourth gap 12 to aerobic zone 3. Moreover, because there is a narrow space in aerobic zone 3, the upward flow velocity of air and water is increased, and the backflow attraction of water entering through the second gap 10 and the fourth gap 12 is also increased, allowing the falling mud and water to quickly replenish aerobic zone 3.

[0068] Specifically, for the sludge suspension zone 5, a second opening 14 can be provided on the side wall of the third annular component 8 near the bottom wall of the main body 1. This allows the water corresponding to the third branch in the annular degassing channel 4 to enter the central sludge suspension zone 5. The sludge in the water entering the sludge suspension zone 5 continuously increases, eventually forming a suspended floc filter bed layer. The top of the third annular component 8 can extend to the top of the main body 1, and the bottom of the third annular component 8 is connected to the bottom wall of the main body 1. The entire sludge suspension zone 5 extends from the bottom to the top of the main body 1. With this configuration, the filtration height of the floc filter bed layer is significantly increased compared to before, resulting in better removal efficiency, stricter end-of-pipe biological control, and more thorough filtration, which is beneficial for improving wastewater treatment efficiency.

[0069] like Figure 2 As shown, the side-flow aerobic granular sludge device also includes a water distribution chamber 16. A V-shaped plate can be installed on the side wall of the first annular member 6 facing the second annular member 7. The V-shaped plate can be arranged around the circumference of the first annular member 6, so that the space between the V-shaped plate and the first annular member 6 forms an annular water distribution chamber 16. Wastewater outside the main body 1 can enter the water distribution chamber 16 after being accelerated by the inlet pipe and the inlet jet 20. A first water passage hole 17 can be provided on the side wall of the water distribution chamber 16 facing the anoxic zone 2, so that the water in the water distribution chamber 16 enters the anoxic zone 2 through the first water passage hole 17. With this arrangement, the anoxic zone 2 adopts an annular water distribution, and the raw water and nitrifying liquid can be quickly mixed in the outer ring of the anoxic zone 2, and the denitrification process starts up faster.

[0070] The first water passage 17 can be a triangular hole, a square hole, a round hole, or a hole of other shapes.

[0071] The side-flow aerobic granular sludge device also includes a sludge return pipe 23. One end of the sludge return pipe 23 can be located at the bottom of the sludge suspension zone 5, and the other end can be connected to the inlet pipe. Under negative pressure, the heavy sludge at the bottom of the sludge suspension zone 5 can be introduced into the inlet pipe, mixed with the raw sewage outside the main body 1, and then enter the water distribution chamber 16. A sludge discharge pipe 26 can be connected to the sludge return pipe 23 to discharge the sludge inside the sludge return pipe 23.

[0072] The side-flow aerobic granular sludge device also includes a lightweight sludge discharge pipe 25. One end of the lightweight sludge discharge pipe 25 can extend into the upper middle part of the sludge suspension zone 5, and the other end extends to the outside of the main body 1 and is connected to the inlet pipe, so that the lightweight sludge in the sludge suspension zone 5 can enter the water distribution chamber 16. With this configuration, two sludge return points are set in the sludge suspension zone 5, which can respectively return the heavy sludge flocs and the lightweight sludge flocs to the anoxic zone 2.

[0073] The side-flow aerobic granular sludge device also includes an effluent trough 28, which can be located at the top of the sludge suspension zone 5. After filtration in the sludge suspension zone 5, the water enters the effluent trough 28. Several effluent pipes 29 are connected to the outside of the effluent trough 28, and the water in the effluent trough 28 can be discharged to the outside of the main body 1 through the effluent pipes 29. In this embodiment, the effluent pipes 29 can be connected to a sedimentation tank for further sedimentation treatment of the water.

[0074] The side-flow aerobic granular sludge device also includes a drain pipe 27, one end of which is connected to the bottom of the aerobic zone 3, and the other end extends to the outside of the main body 1.

[0075] like Figure 3 As shown, in one embodiment, the main body 1 is further provided with a sedimentation zone 32. The sedimentation zone 32 can be set in the sludge suspension zone 5 and located downstream of the sludge suspension zone 5. A light sludge collection hopper 24 is provided in the sedimentation zone 32 for collecting light sludge. One end of the light sludge discharge pipe 25 is connected to the light sludge collection hopper 24, and the other end is connected to the water inlet pipe.

[0076] The sedimentation zone 32 is also equipped with a gas collection hood 33, a gas collection pipe 34, and an exhaust pipe 35. The gas collection hood 33 can be installed on the outer wall of the light sludge collection hopper 24 along its circumference. One end of the gas collection pipe 34 is connected to the internal space of the gas collection hood 33, and the other end is connected to the exhaust pipe 35. For example, the top of the main body 1 is an open structure, and the end of the exhaust pipe 35 away from the gas collection pipe 34 can extend out of the water surface to discharge excess gas in the sedimentation zone 32.

[0077] The sedimentation zone 32 is also equipped with an inclined tube separation device 37, which is located upstream of the effluent tank 28 and downstream of the light sludge collection hopper 24. After the water is separated by sedimentation through the inclined tube separation device 37, the water enters the effluent tank 28, and the light sludge can fall into the light sludge collection hopper 24.

[0078] A cylindrical body 36 can be installed in the sedimentation zone 32, concentrically with the main body 1. The lower end of the cylindrical body 36 extends towards the light sludge collection hopper 24, and the upper end extends to the top of the main body 1. Light sludge can enter the light sludge collection hopper 24 through the gap between the cylindrical body 36 and the light sludge collection hopper 24. An inclined tube separation device 37 can be arranged around the cylindrical body 36. An exhaust pipe 35 can extend from the inside of the cylindrical body 36 to the top of the main body 1.

[0079] like Figure 6 As shown, the water outlet trough 28 can be divided into an inner ring part and an outer ring part that are connected. The inner ring part can be arranged along the circumference of the cylinder 36, and the outer ring part can be arranged along the circumference of the first annular member 6.

[0080] In one embodiment, the upper half of the third annular member 8 can be a bucket-shaped structure so that the flow channel area of ​​the sedimentation zone 32 gradually increases from upstream to downstream, which is beneficial to improving the sedimentation separation effect.

[0081] like Figure 10 As shown, in one embodiment, the end of the gas collecting pipe 34 away from the exhaust pipe 35 can extend into the sedimentation zone 32 through the side wall of the light sludge collecting hopper 24.

[0082] The inlet pipe may include a first pipe body 18 and a second pipe body 19. One end of the first pipe body 18 is connected to an external sewage source, and the other end is connected to an inlet jet 20. One end of the second pipe body 19 is covered by the outlet of the inlet jet 20, and the other end extends into the water distribution chamber 16.

[0083] In one embodiment, the second pipe body 19 is located outside the main body 1, and both the lightweight sludge discharge pipe 25 and the sludge return pipe 23 are connected to the second pipe body 19. This arrangement facilitates the maintenance of the second pipe body 19.

[0084] like Figure 7 , Figure 8 As shown, in one embodiment, the second pipe body 19 is located inside the main body 1. For example, the second pipe body 19 can be set in the inner ring of the third annular member 8, and then the water in the second pipe body 19 is sent into the water distribution chamber 16 through the first water inlet branch pipe 38. At this time, the sludge return pipe 23 can also be set in the inner ring of the third annular member 8, with one end extending downward into the sludge suspension zone 5, or upward into the sludge suspension zone 5, or upward into the light sludge collection hopper 24, and the other end connected to the second pipe body 19. When the sludge return pipe 23 extends into the light sludge collection hopper 24, the light sludge discharge pipe 25 is used to discharge sludge from the light sludge collection hopper 24.

[0085] like Figure 9 As shown, in one embodiment, a sludge reverse cone 39 is provided at the bottom of the sludge suspension zone 5, and the second opening 14 can be the gap between the bottom of the third annular member 8 and the side wall of the sludge reverse cone 39. This arrangement allows a portion of the sludge to slide down along the sludge reverse cone 39 under gravity and return to the aerobic zone 3 through the fourth notch 12, thus maintaining the sludge concentration in the aerobic zone 3 within a certain range.

[0086] like Figure 4 , Figure 5As shown, in one embodiment, a second water passage 30 can be provided on the side wall of the first annular member 6 facing the anoxic zone 2, so that the nitrified liquid in the aerobic zone 3 can enter the anoxic zone 2 through the second water passage 30. The second water passage 30 here has the same function as the first notch 9 in the above embodiment, which is to provide a channel for the nitrified liquid to cross the zone.

[0087] like Figure 11 As shown, for example, a swirl guide plate 31 can also be set at the edge of the second water passage 30. That is, the swirl guide plate 31 is located in the anoxic zone 2. In the anoxic zone 2, the water in the area without the swirl guide plate 31 can fall directly. In the area of ​​the anoxic zone 2 with the swirl guide plate 31, the gas in the water-air mixture can be guided to move upward through the swirl guide plate 31, while the water is guided to move downward, so as to separate the gas from the water as much as possible.

[0088] In one embodiment, the second opening 14 can be designed as a V-shaped or generally V-shaped baffle channel. The second opening 14 can also be designed as a toothed opening. The purpose is to reduce the amount of sludge flowing into the sludge suspension zone 5 with the water and ensure that a portion of the sludge in the annular degassing channel 4 can be returned to the aerobic zone 3.

[0089] like Figure 12 As shown, in one embodiment, the body 1 can also be a vertical tank-like structure with a square cross-section.

[0090] In use: After the raw water enters the distribution tank 16, it flows out of the outlet of the distribution tank 16 and enters the anoxic zone 2. The water in the anoxic zone 2 enters the aerobic zone 3 through the second gap 10. The water flows upward under the action of air lifting and propulsion. The nitrified liquid in the aerobic zone 3 enters the anoxic zone 2 through the first gap 9. After the nitrified liquid mixes with the raw water in the anoxic zone 2, the total nitrogen in the wastewater is removed through denitrification. The sludge in the aerobic zone 3 can enter the anoxic zone 2 through the first opening 13. The microorganisms in the sludge are in a state of starvation. After entering the anoxic zone 2, the pollutants in the raw water can provide nutrients for the microorganisms, enabling them to reproduce and grow rapidly. The microbial flocs aggregate and form sludge flocs. After the sludge enters the aerobic zone 3, the pollutants are continuously consumed and are basically consumed near the first opening 13. The starved microorganisms re-enter the anoxic zone 2, and the cycle continues, repeating the above process. A portion of the water in the aerobic zone 3 enters the annular deaeration channel 4 through the third gap 11. Then, a portion of the water in the annular deaeration channel 4 enters the sludge suspension zone 5 through the second opening 14. Another portion of the water in the annular deaeration channel 4 flows back to the aerobic zone 3 through the fourth gap 12. The sludge in the water can form a flocculent filter bed in the sludge suspension zone 5 to filter the flowing water, further purifying it. Afterward, the water enters the sedimentation zone 32, undergoes sedimentation and separation by the inclined tube separator 37, and then enters the effluent tank 28, finally being discharged from the main body 1 through the effluent pipe 29.

[0091] like Figure 13 , Figure 14 As shown, in one embodiment, when the main body 1 is a cylindrical tank structure, the side-flow aerobic granular sludge device of this application can also be used as a sewage treatment module placed in the sewage treatment tank 40. Instead of forming an anoxic zone 2 between the first annular component 6 and the inner wall of the main body 1, the sewage tank area surrounding the side-flow aerobic granular sludge device is used as the anoxic zone 2. The area between the second annular component 7 and the main body 1 forms the aerobic zone 3. The aerobic zone 3 is located at the outermost ring of the main body 1, and a gap is left between the bottom of the main body 1 and the bottom of the sewage treatment tank 40 so that the water in the sewage treatment tank 40 can flow back into the aerobic zone 3 through this gap. Furthermore, multiple sewage treatment modules can be used in combination. For example, four sewage treatment modules can be arranged in a 2x2 array within the sewage treatment tank 40. In this case, a main inlet pipe 41 can be used, and then four second inlet branch pipes 42 connected to this main pipe can be used to supply water to the inlet pipes of the four sewage treatment modules respectively. In operation, wastewater enters the distribution tank 16 and flows into the wastewater treatment tank 40. The water in the wastewater treatment tank 40, mixed with nitrifying liquid, then flows into the aerobic zone 3 through the gap between the bottom of the main body 1 and the bottom of the wastewater treatment tank 40. The nitrifying liquid in the aerobic zone 3 flows out of the main body 1 and back into the wastewater treatment tank 40, while the water enters the downstream annular deaeration channel 4. This configuration provides an upgrade method for existing tank structures without altering the original structure. By utilizing modules placed within the tank, granular sludge is formed within the main body 1 to treat the wastewater, thus achieving the upgrade.

[0092] like Figure 15 , Figure 16 as well as Figure 17As shown, in one embodiment, when the main body 1 is a rectangular tank structure, the side-flow aerobic granular sludge device of this application can also be used as a sewage treatment module placed in the sewage treatment tank 40. Instead of forming an anoxic zone 2 between the first annular member 6 and the inner wall of the main body 1, the sewage tank area between two adjacent side-flow aerobic granular sludge devices is considered the anoxic zone 2. The area between the second annular member 7 and the main body 1 forms the aerobic zone 3. The aerobic zone 3 is located at the outermost ring of the main body 1, and a gap is left between the bottom of the main body 1 and the bottom of the sewage treatment tank 40 so that the water in the sewage treatment tank 40 can flow back to the aerobic zone 3 through this gap. In use, multiple sewage treatment modules can be used in combination. For example, multiple sewage treatment modules can be placed in the sewage treatment tank 40 in a row with spacing. Water can be supplied to the adjacent sewage treatment modules through a main inlet pipe 41 and several second inlet branch pipes 42 connected to the main pipe, extending to the space between adjacent sewage treatment modules. Furthermore, the length of each second inlet branch pipe 42 can be consistent with the length of the main body 1, resulting in more uniform water distribution. Two rows of downward-sloping water distribution holes can be provided on the second inlet branch pipe 42, and these holes can be evenly distributed along the length of the main body 1, allowing the sprayed water to directly mix with the nitrifying liquid from the aerobic zone 3. Multiple sludge return pipes 23 can be installed along the length of the main body 1, with one end of each pipe located within the sedimentation zone 32 and the other end connected to the second inlet branch pipe 42, allowing sludge inside the main body 1 to return to the wastewater treatment tank 40. For example, side collection hoppers 43 can be installed at both ends of the main body 1 to collect light sludge, and sludge discharge pipes 26 can be installed at the bottom of the side collection hoppers 43 for sludge return or discharge.

[0093] In cases where the ammonia nitrogen level in the raw water is high, the internal reflux flow rate of aerobic zone 3 is large, and aerobic zone 3 requires a higher treatment load. The fourth gap 12 in the above embodiment can be used to connect the annular degassing channel 4 to aerobic zone 3 to increase the reflux flow rate.

[0094] like Figure 18 As shown, in one embodiment, the fourth notch 12 is no longer left between the bottom end of the second annular component 7 and the bottom wall of the main body 1, so that all the water in the annular degassing channel 4 enters the downstream sludge suspension zone 5. This configuration is suitable for scenarios where the ammonia nitrogen content of the raw water is very low. Figure 19As shown, in this embodiment, sludge discharge pipes 26 can be installed at the bottom of the sludge suspension zone and in the lower middle part of the aerobic zone 3. The sludge discharge pipes 26 in the sludge suspension zone can be conventional sludge discharge pipes 26. One end of the sludge discharge pipe 26 extends into the bottom of the sludge suspension zone, and the other end extends to the outside of the main body 1. Specifically, the sludge discharge pipe 26 in the aerobic zone 3 can include a main sludge discharge pipe and annular branch sludge discharge pipes. The annular branch sludge discharge pipes are located within the aerobic zone 3 and have several sludge inlets. The main sludge discharge pipe is connected to the branch sludge discharge pipes and extends to the outside of the main body 1. Sludge in the aerobic zone 3 is collected through the branch sludge discharge pipes and then discharged through the main sludge discharge pipe.

[0095] like Figure 20 , Figure 21 As shown, in one embodiment, the fourth notch 12 can be a discontinuous design, that is, the fourth notch 12 can be multiple holes distributed on the bottom sidewall of the second annular component 7. For example, 12 holes can be spaced apart along the circumferential direction of the second annular component 7. Inclined plates can be provided on both sides of each hole. One end of the inclined plate is connected to the hole, and the other end is inclined upwards and connected to the third annular component 8. Under the guidance of the inclined plates, the water in the annular degassing channel 4 is introduced into the aerobic zone 3 through the holes. This configuration is suitable for scenarios where the ammonia nitrogen in the raw water is not very high.

[0096] like Figure 22 As shown, the aeration device 15 includes: aerators 44, disposed within the aerobic zone 3; wherein, multiple aerators 44 can be disposed, and the aerators 44 can be arranged in a point pattern within the aerobic zone 3, for example, multiple point-arranged aerators 44 can be arranged in a ring. The aerators 44 can also be arranged in a strip pattern within the aerobic zone 3, for example, multiple aerators 44 can be arranged in a row or column array. The arrangement of the aerators 44 is not limited to the above two methods, and the actual arrangement of the aerators 44 can be designed according to needs. A premixing hood 45 is installed over the air outlet of the aerator 44, and the space between the premixing hood 45 and the aerator 44 forms a first premixing zone 46. A gap is left between the premixing hood 45 and the aerator 44 to form a return water inlet 47, which connects the first premixing zone 46 to the space outside the first premixing zone 46. The flow area of ​​the release port of the premixing hood 45 is smaller than the flow area of ​​the inlet of the premixing hood 45 to increase the pressure within the first premixing zone 46 during aeration. For example, the premixing hood 45 can be a frustum-shaped structure with open ends, the larger end at the bottom and the smaller end at the top, with the smaller end used as the release port. Alternatively, the premixing hood 45 can also be a frustum-shaped structure with open ends, the larger end at the bottom and the smaller end at the top, with the smaller end used as the release port. The premix hood 45 can be welded to the side wall of the aerobic zone 3 by setting a connecting rod on the side wall; or it can be installed as an integral structure with the air pipe support of the aerator 44 and fixed on the air pipe support of the aerator 44.

[0097] The aeration device 15 provided in this embodiment releases air from the aerator 44 in the first premixing zone 46. Due to the rapid rise of the bubbles, water from outside the first premixing zone 46 is drawn into the zone through the return water inlet 47. Furthermore, the narrowing of the release port directly above the premixing hood 45 increases the pressure in the first premixing zone 46, further mixing the bubbles with the water returning through the return water inlet 47. The increased pressure further enhances the mixing effect. The resulting air-water mixture is then sprayed out through the release port and rises to the aerobic zone 3 outside the first premixing zone 46. This configuration allows the aeration device 15 to increase dissolved oxygen concentration through reflux, mixing, and pressurized dissolved gas during use, resulting in higher efficiency and greater energy savings under the same aeration conditions.

[0098] like Figure 23 As shown, the aeration device 15 also includes a rectifier 48, which covers the release port of the premixing hood 45. The end of the rectifier 48 away from the premixing hood 45 is sealed, and the inner diameter of the rectifier 48 gradually decreases in the direction away from the premixing hood 45. The space between the rectifier 48 and the premixing hood 45 forms a second premixing zone 49. A gap is left between the rectifier 48 and the premixing hood 45 to form a diversion port 53, which connects the second premixing zone 49 to the space outside the second premixing zone 49. The rectifier 48 can be welded to the side wall of the aerobic zone 3 by means of connecting rods provided on the side wall. For example, the rectifier 48 can be a conical structure with the cone apex at the top. As another example, the premixing hood 45 can also be a prismatic structure with the smaller top surface at the top. The shape of the rectifier 48 is adapted to the shape of the premixing hood 45. For example, when the premixing hood 45 is a frustum-shaped structure, the rectifier 48 can be a conical structure. For example, when the premixing shroud 45 has a frustum-shaped structure, the rectifier 48 can have a prism-shaped structure. In use, the gas-water mixture in the first premixing zone 46 enters the second premixing zone 49 through the release port of the premixing shroud 45. The gas-water mixture in the second premixing zone 49 flows out through the diversion port 53 and splits into two branches. One branch's gas-water mixture moves towards the return port 47, thus forming a circulation. The other branch's gas-water mixture flows downstream over the rectifier 48. Furthermore, since the sidewall of the rectifier 48 is inclined, it forms a slope. A portion of the gas-water mixture slides down the slope, mixing with the rapidly rising gas-water mixture, thereby improving the mixing effect.

[0099] like Figure 27As shown, the edge of the fairing 48 can be provided with several toothed orifices 52, which are distributed circumferentially along the fairing 48. This arrangement has two advantages: first, the toothed orifices 52 can enhance the mixing effect because the flow velocities in the concave and convex areas of the orifices differ, increasing the turbulent mixing effect; second, it has the function of cutting bubbles, which can break large bubbles into smaller ones, increasing the contact area with water and thus increasing dissolved oxygen. Furthermore, the horizontal and downward backflow of the gas-water mixture further enhances the mixing effect, and the downward flow of the gas-water mixture increases the mixing distance, prolonging the effective contact time and preventing it from rising directly to the liquid surface.

[0100] like Figure 24 As shown, in one embodiment, the aeration device 15 further includes a flow retainer 50 disposed between the premixing hood 45 and the rectifier hood 48, with the end of the flow retainer 50 away from the rectifier hood 48 connected to the release port of the premixing hood 45. For example, when the premixing hood 45 has a frustum-shaped structure, the flow retainer 50 can be a circular tube. When the premixing hood 45 has a frustum-shaped structure, the flow retainer 50 can be a square tube, thus adapting to the shape of the premixing hood 45. In use, the air-water mixture flowing out of the release port of the premixing hood 45 can enter the flow retainer 50. Within the flow retainer 50, the velocity change of the air-water mixture is small, maintaining a high flow rate, and then it is released from the top outlet of the flow retainer 50 to the second premixing zone 49. With this configuration, adding a flow retainer 50 section to the release port of the premixing hood 45, this straight flow retainer 50 can maintain a large guiding force in the first premixing zone 46. Because the speed-maintaining component 50 increases the height of the release port of the premixing hood 45, the flow rate of the gas-water mixture outside the premixing hood 45 is relatively low, and the speed difference between it and the gas-water mixture in the first premixing zone 46 is relatively large, so the pressure difference is large. Compared with the absence of the speed-maintaining component 50, the speed difference between the two is even greater, so the diversion effect is better.

[0101] like Figure 25 As shown, the aeration device 15 also includes a baffle 51, which is disposed inside the shroud 48, with the baffle 51 facing the outlet of the retaining element 50. During use, the gas-water mixture released from the outlet at the top of the retaining element 50 impacts the baffle 51 and then diffuses outwards. This arrangement prevents air from accumulating at the top of the shroud 48, thus preventing bubble aggregation and ensuring smooth gas release into the water, thereby improving the gas-water mixing effect.

[0102] like Figure 26 As shown, in another embodiment, the aeration device 15 further includes a speed-holding member 50; one end of the speed-holding member 50 is connected to the release port of the premixing hood 45, and the other end extends in a direction away from the premixing hood 45.

[0103] like Figure 28As shown, in one embodiment, the side-flow aerobic granular sludge device supplies water to the anoxic zone 2 through an annular inlet pipe 54. The annular inlet pipe 54 can be a pipe with a circular end face. The annular inlet pipe 54 is located outside the main body 1 and is arranged around the anoxic zone 2. The water in the second pipe body 19 enters the annular inlet pipe 54 and is then distributed to the anoxic zone 2.

[0104] like Figure 29 As shown, in one embodiment, the side-flow aerobic granular sludge device supplies water to the anoxic zone 2 through an annular inlet pipe 54. The annular inlet pipe 54 can be a pipe with a half-hexagonal end face. The annular inlet pipe 54 is located inside the main body and is arranged around the anoxic zone 2. The water in the first inlet branch pipe 38 enters the annular inlet pipe 54 and is then distributed to the anoxic zone 2.

[0105] like Figure 30 As shown, in one embodiment, the side-flow aerobic granular sludge device divides the water into two parts by setting a diversion plate 55 in the annular degassing channel 4. One part of the water flows back into the aerobic zone 3, and the other part of the water enters the downstream sludge suspension zone 5. The position of the diversion plate 55 can be adjusted according to actual needs so that the water flowing back into the aerobic zone 3 exits at a position approximately flush with the position of the retaining element 50, which helps improve the backflow effect.

[0106] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A side-flow aerobic granular sludge treatment device, characterized in that, include: The body (1) has at least an anoxic zone (2) and an aerobic zone (3) set along the water flow path inside the body (1); The upstream flow channel area of ​​the aerobic zone (3) is smaller than the downstream flow channel area, and an aeration device (15) is provided in the upstream flow channel of the aerobic zone (3); the inlet of the aerobic zone (3) is connected to the outlet of the anoxic zone (2), and the outlet of the aerobic zone (3) is divided into a first branch and a second branch. The first branch is connected to the anoxic zone (2), and the second branch is used to connect to the downstream process area of ​​the aerobic zone (3); The anoxic zone (2) is connected to an external sewage source. After the external sewage enters the anoxic zone (2), it flows to the aerobic zone (3). Under the action of the aeration device (15), the aerobic zone (3) uses the air lift generated by the rising gas to transport the nitrified liquid in the aerobic zone (3) to the anoxic zone (2) through the first branch. An exhaust pipe (27) is provided, one end of which is connected to the bottom of the aerobic zone (3), and the other end extends to the outside of the body (1).

2. The side-flow aerobic granular sludge treatment device according to claim 1, characterized in that, The upstream flow channel of the aerobic zone (3) includes a premixing section (21) and a speed-maintaining section (22) connected together, and the speed-maintaining section (22) is located downstream of the premixing section (21); The flow channel area of ​​the premixing section (21) gradually decreases along the direction close to the speed-maintaining section (22), and the aeration device (15) is disposed in the premixing section (21); A gap is left between the end of the premixing section (21) away from the speed-maintaining section (22) and the bottom of the body (1) so that the water in the anoxic zone (2) can enter the aerobic zone (3).

3. The side-flow aerobic granular sludge device according to claim 2, characterized in that, A first opening (13) is provided between the aerobic zone (3) and the anoxic zone (2), and a portion of the sludge in the aerobic zone (3) enters the anoxic zone (2) through the first opening (13).

4. The side-flow aerobic granular sludge treatment device according to claim 1, characterized in that, The main body (1) is also provided with an annular degassing channel (4) and a sludge suspension zone (5) along the water flow path; The annular degassing channel (4) is located downstream of the aerobic zone (3), and the inlet of the annular degassing channel (4) is connected to the second branch. The outlet of the annular degassing channel (4) is connected to the sludge suspension zone (5); Alternatively, the outlet of the annular degassing channel (4) may be divided into a third branch and a fourth branch. A portion of the water in the annular degassing channel (4) may enter the sludge suspension zone (5) through the third branch, while another portion of the water in the annular degassing channel (4) may flow back to the aerobic zone (3) through the fourth branch.

5. The side-flow aerobic granular sludge treatment device according to claim 4, characterized in that, The main body (1) is a vertical tank-shaped structure with a circular or square cross section. The anoxic zone (2), aerobic zone (3), annular degassing channel (4) and sludge suspension zone (5) are concentrically distributed within the main body (1), and from the inside out, they are the sludge suspension zone (5), annular degassing channel (4), aerobic zone (3) and anoxic zone (2), respectively.

6. The side-flow aerobic granular sludge device according to claim 4, characterized in that, A sedimentation zone (32) is also provided inside the body (1) along the water flow path. The sedimentation zone (32) is located downstream of the sludge suspension zone (5), and the inlet of the sedimentation zone (32) is connected to the outlet of the sludge suspension zone (5).

7. The side-flow aerobic granular sludge treatment device according to claim 6, characterized in that, It also includes a water distribution tank (16), which is set inside the main body (1), and the water distribution tank (16) is arranged in a ring along the circumference of the anoxic zone (2). The inlet of the water distribution tank (16) is suitable for connection with an external sewage source, and the outlet of the water distribution tank (16) is connected to the anoxic zone (2). The water distribution tank (16) delivers water to the anoxic zone (2) in a ring-shaped water distribution manner.

8. The side-flow aerobic granular sludge device according to claim 7, characterized in that, It also includes an inlet jet (20), an inlet pipe, and a sludge return pipe (23); One end of the water inlet ejector (20) is connected to the sewage source, and the other end extends into the water inlet pipe; The end of the water inlet pipe away from the water inlet jet (20) is connected to the water distribution chamber (16); One end of the sludge return pipe (23) is connected to the water inlet pipe, and the other end is connected to the sludge suspension zone (5) so as to use negative pressure to transport the heavy sludge in the sludge suspension zone (5) to the anoxic zone (2).

9. The side-flow aerobic granular sludge device according to claim 8, characterized in that, It also includes a light sludge collection hopper (24) and a light sludge discharge pipe (25); The light sludge collection hopper (24) is set in the sedimentation zone (32) or the sludge suspension zone (5) for collecting light sludge in the sedimentation zone (32) or the sludge suspension zone (5); One end of the light sludge discharge pipe (25) is connected to the light sludge collection hopper (24), and the other end is connected to the water inlet pipe, so as to use negative pressure to transport the light sludge in the sludge suspension zone (5) to the anoxic zone (2).

10. The side-flow aerobic granular sludge treatment device according to claim 8, characterized in that, The inlet pipe is located in the sludge suspension zone (5), and the inlet pipe is connected to the water distribution chamber (16) through the first inlet branch pipe (38).

11. The side-flow aerobic granular sludge treatment device according to claim 10, characterized in that, The aeration device (15) includes: Aerator (44) is installed in the aerobic zone (3); A premixing hood (45) is installed over the air outlet of the aerator (44). The space between the premixing hood (45) and the aerator (44) forms a first premixing zone (46). A gap is left between the premixing hood (45) and the aerator (44) to form a return water inlet (47). The return water inlet (47) connects the first premixing zone (46) with the space outside the first premixing zone (46). The flow area of ​​the release port of the premixing hood (45) is smaller than the flow area of ​​the inlet of the premixing hood (45) to increase the pressure in the first premixing zone (46) under aeration conditions.

12. The side-flow aerobic granular sludge treatment device according to claim 11, characterized in that, It also includes a fairing (48) which covers the release port of the premixed shield (45). The end of the fairing (48) away from the premixed shield (45) is a sealed structure, and the inner diameter of the fairing (48) gradually decreases in the direction away from the premixed shield (45). The space between the fairing (48) and the premixing fairing (45) forms a second premixing zone (49); A gap is left between the fairing (48) and the premixing fairing (45) to form a diversion port (53), which connects the second premixing zone (49) with the space outside the second premixing zone (49).

13. The side-flow aerobic granular sludge treatment device according to claim 12, characterized in that, The fairing (48) has a plurality of toothed openings (52) along its edge, and the plurality of toothed openings (52) are distributed circumferentially along the fairing (48).

14. The side-flow aerobic granular sludge treatment device according to claim 12, characterized in that, It also includes a speed-maintaining component (50), which is disposed between the premixed cover (45) and the fairing (48), and the end of the speed-maintaining component (50) away from the fairing (48) is connected to the release port of the premixed cover (45).

15. The side-flow aerobic granular sludge treatment device according to claim 14, characterized in that, It also includes a baffle (51) disposed inside the fairing (48), with the baffle (51) facing the outlet of the speed-maintaining component (50).

16. The side-flow aerobic granular sludge treatment device according to claim 11, characterized in that, It also includes speed-maintaining parts (50); One end of the speed-maintaining component (50) is connected to the release port of the premixed cover (45), and the other end extends in a direction away from the premixed cover (45).

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