Integrated granular sludge anammox reactor

Abstract

The application discloses an integrated anaerobic ammonia oxidation reactor for capturing granular sludge in the technical field of anaerobic ammonia oxidation water treatment, which comprises a reactor main body, a three-phase separator is installed at the inner top end of the reactor main body, and a plurality of water outlets are arranged at the upper end of the reactor main body. In the application, the high-activity anaerobic ammonia oxidation granular sludge at the upper end of the reactor main body floats on the water surface and is guided out through the plurality of water outlets, the high-activity anaerobic ammonia oxidation granular sludge is guided into a separation and precipitation component, nitrogen gas generated by separating the granular sludge is separated, and then the granular sludge is precipitated; the separation and precipitation component intermittently precipitates the granular sludge, the supernatant after precipitation is guided out, the concentration of suspended solids in the guided-out supernatant is prevented from exceeding the standard, the precipitated granular sludge is backflowed through a backflow component, the water inlet component carries the precipitated granular sludge to be guided into the reactor main body again, the biomass in the reactor main body is ensured, and the water body is fully decomposed.

Description

Technical Field

[0001] This invention relates to the field of anaerobic ammonia oxidation water treatment technology, specifically an integrated anaerobic ammonia oxidation reactor for collecting granular sludge. Background Technology

[0002] To control nitrogen pollution in water bodies, countries worldwide are actively researching and applying wastewater denitrification technologies. Currently, the main denitrification technologies include physicochemical and biological methods. Physicochemical methods, such as air stripping and sedimentation, are simple to operate but costly, inefficient, and prone to secondary pollution. Biological methods, centered on microbial denitrification, mainly include nitrification-denitrification and anaerobic ammonium oxidation (ANAO). The traditional nitrification-denitrification process is currently the most widely used denitrification technology. This process utilizes nitrifying and denitrifying bacteria to convert ammonia nitrogen into nitrate under aerobic and anoxic conditions, and then reduces the nitrate back to nitrogen gas. However, this process is energy-intensive, requires a large area, has low denitrification efficiency, and requires an external organic carbon source. Anaerobic ammonium oxidation (ANAO) is an emerging denitrification technology. Its principle is to utilize anaerobic ammonium-oxidizing bacteria under anoxic conditions, using nitrite as an electron acceptor, to directly convert ammonia nitrogen into nitrogen gas, producing a small amount of nitrate. Compared with traditional nitrification-denitrification processes, anaerobic ammonia oxidation (ANAO) offers higher nitrogen removal efficiency, lower carbon footprint and energy savings, smaller footprint, and greater environmental friendliness. The discovery of ANAO has revolutionized traditional nitrogen removal concepts, bringing about a revolutionary advancement in wastewater denitrification technology.

[0003] Despite the numerous advantages of anammox, in practical engineering applications, the performance of its three-phase separator is lower compared to other types of anammox reactors. This results in low three-phase separation efficiency in the anammox process, and the highly active anammox granular sludge tends to float on the water surface and be lost to subsequent structures with the effluent, leading to excessive suspended solids concentration in the effluent. Furthermore, the loss of granular sludge not only affects the effluent quality but also reduces the biomass in the reactor, impacting denitrification efficiency and resulting in poor performance. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated anaerobic ammonia oxidation reactor for collecting granular sludge, in order to solve the problems of low three-phase separation efficiency, high-activity anaerobic ammonia oxidation granular sludge easily floating on the water surface and being lost to subsequent structures with the effluent in the above-mentioned anaerobic ammonia oxidation process, resulting in excessive suspended solids concentration in the effluent. Moreover, the loss of granular sludge not only affects the effluent quality, but also reduces the biomass in the reactor and affects the denitrification efficiency.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An integrated anaerobic ammonia oxidation reactor for granular sludge collection includes a reactor body, a three-phase separator installed at the top of the reactor body, and multiple outlets provided at the top of the reactor body. The three-phase separator is used for the preliminary separation of gas phase, solid phase and liquid phase in the fluid after the reaction.

[0007] The outer wall of the reactor body is connected to a separation and sedimentation component, which is connected to a reflux component. The separation and sedimentation component is used for intermittent secondary sedimentation of the solid phase, and the reflux component is used to reflux the solid and liquid phases.

[0008] The bottom of the reactor body is connected to a water inlet component, which is connected to a reflux component. The water inlet component is used to introduce water into the bottom of the reactor body and mix the water with the refluxed solid and liquid phases.

[0009] As a further embodiment of the present invention: the separation and sedimentation component includes a screen and an outlet weir ring, and the outlet is connected to the screen;

[0010] The effluent weir ring is connected to the outer wall of the reactor body. The effluent weir ring is arranged around multiple effluent outlets. Multiple agitators are connected to the effluent weir ring. The agitators are used to stir the fluid so that the granular sludge settles.

[0011] The bottom end of the outlet weir ring is connected to the return flow component.

[0012] As a further embodiment of the present invention: the separation and sedimentation component further includes a scraping component, the scraping component includes a retaining ring and a scraper, a plurality of scrapers are fixedly welded on the retaining ring, a drive ring is welded on the scraper, a gear is provided on the outer wall of the drive ring, a drive gear is welded to the bottom end of the stirrer, the drive gear is matched with a meshing gear, a limiting groove is provided on the outer wall of the reactor body, and the retaining ring is matched and engaged in the limiting groove.

[0013] As a further aspect of the present invention: the bottom end of the outlet weir ring is provided with a sloping surface, and the bottom end surface of the scraper matches the sloping surface at the bottom end of the outlet weir ring.

[0014] As a further aspect of the present invention: the scraper is provided with a groove, the width of which is greater than the width of the drive gear.

[0015] As a further aspect of the present invention: the reflux component includes a reflux pipe and a mixing box, the reflux pipe is connected to the bottom end of the outlet weir ring, the bottom end of the reflux pipe is connected to the mixing box, and the mixing box is connected to the inlet component.

[0016] As a further aspect of the present invention: an agitator ring is installed inside the mixing chamber, and the agitator ring is connected to an external driving component.

[0017] As a further aspect of the present invention: the water inlet component includes a water inlet pipe, the mixing tank is connected to the water inlet pipe, the water inlet pipe is disposed at the bottom end of the reactor body, and the water inlet pipe is used to introduce water into the bottom of the reactor body and mix the water with the refluxed solid and liquid phases.

[0018] As a further aspect of the present invention: the water outlet end of the water inlet pipe is a tubular body, and the tubular body is provided with multiple water outlet holes.

[0019] As a further aspect of the present invention: the water outlet end of the water inlet pipe is an annular body, and the annular body is provided with multiple water outlet holes.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. In this invention, highly active anaerobic ammonia oxidation granular sludge floats on the water surface at the upper part of the reactor body and is discharged through multiple outlets. The highly active anaerobic ammonia oxidation granular sludge is introduced into the separation and sedimentation component, allowing the granular sludge to separate from the nitrogen gas generated during separation, thereby causing the granular sludge to settle. The separation and sedimentation component intermittently settles the granular sludge, and the supernatant after sedimentation is discharged to avoid the suspended solids concentration of the discharged supernatant exceeding the standard. The granular sludge sediment is returned through the return component, allowing the inlet component to carry the settled granular sludge back into the reactor body, ensuring the biomass in the reactor body and ensuring the full decomposition of the water. The overall denitrification efficiency of the device is high.

[0022] 2. In this invention, suspended granular sludge is discharged through multiple outlets and flows into the effluent weir ring. The effluent weir ring not only collects the clear liquid after filtration through a screen, but also intermittently stirs the mixture of granular sludge and water through multiple agitators. These agitators rapidly stir the granular sludge, causing nitrogen gas to escape from the granular sludge. After the agitators stop stirring, the nitrogen-exposed granular sludge settles at the bottom of the effluent weir ring by gravity. The supernatant is discharged when the agitators stop stirring intermittently, avoiding excessive suspended solids concentration in the discharged supernatant. The bottom of the effluent weir ring is connected to a return component, allowing the settled granular sludge to flow smoothly back into the reactor body, thereby realizing the recycling of granular sludge and ensuring the stability of biomass within the reactor body. Attached Figure Description

[0023] Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the three-dimensional structure of the scraper of the present invention.

[0026] In the diagram: 1. Reactor body; 11. Limiting groove; 2. Three-phase separator; 3. Outlet; 4. Screen; 5. Outlet weir ring; 6. Agitator; 61. Drive gear; 7. Snap ring; 71. Scraper; 72. Tank; 73. Drive ring; 8. Return pipe; 81. Mixing box; 9. Inlet pipe. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0028] Example:

[0029] Please see Figures 1-3 In this embodiment of the invention, an integrated anaerobic ammonia oxidation reactor for granular sludge collection includes a reactor body 1. A three-phase separator 2 is installed at the top of the reactor body 1. Multiple outlets 3 are provided at the upper end of the reactor body 1. The three-phase separator 2 is used for the preliminary separation of gas phase, solid phase and liquid phase in the fluid after the reaction. A separation sedimentation component is connected to the outer wall of the reactor body 1. The separation sedimentation component is connected to a reflux component. The separation sedimentation component is used for intermittent secondary sedimentation of the solid phase. The reflux component is used to return the solid and liquid phases. A water inlet component is connected to the bottom of the reactor body 1. The water inlet component is connected to the reflux component. The water inlet component is used to introduce water into the bottom of the reactor body 1 and mix the water with the returned solid and liquid phases.

[0030] The water to be treated is introduced into the reactor body 1. Anaerobic ammonia oxidation granular sludge is installed inside the reactor body 1. The anaerobic ammonia oxidation granular sludge contains highly efficient nitrifying and denitrifying bacteria. Under aerobic and anoxic conditions, the nitrifying and denitrifying bacteria convert ammonia nitrogen into nitrate, and then reduce the nitrate into nitrogen gas. After the water is treated, the upper liquid is a three-phase mixture of granular sludge, water and nitrogen gas.

[0031] Specifically, in this invention, the internal cavity of the reactor body 1 introduces the water to be treated through the inlet component. Nitrifying and denitrifying bacteria in the reactor body 1 convert ammonia nitrogen into nitrate under aerobic and anoxic conditions, and then reduce the nitrate into nitrogen gas. The treated gas, solid, and liquid mixture undergoes preliminary separation through the three-phase separator 2 inside the reactor body 1. Since the three-phase separator 2 cannot completely separate the three phases in the mixture, the highly active anaerobic ammonia oxidation granular sludge at the upper part of the reactor body 1 floats on the water surface and is discharged through multiple outlets 3. The highly active anaerobic ammonia oxidation granular sludge is introduced into the separation and sedimentation component, allowing the granular sludge to separate from the nitrogen gas generated during separation, thereby allowing the granular sludge to settle. The separation and sedimentation component intermittently settles the granular sludge, and the supernatant after sedimentation is discharged to avoid the suspended solids concentration of the discharged supernatant exceeding the standard. The granular sludge sediment is returned through the return component, allowing the inlet component to carry the settled granular sludge back into the reactor body 1, ensuring the biomass in the reactor body 1, ensuring the full decomposition of the water, and the overall denitrification efficiency of the device is high.

[0032] Furthermore, reactor body 1 is a conventional anaerobic ammonia oxidation reactor available on the market. The separation and sedimentation components and the reflux components can be installed on a conventional anaerobic ammonia oxidation reactor without requiring significant modifications to reactor body 1, thus achieving efficient water denitrification treatment. The ingenious design of the separation and sedimentation components ensures effective separation of the highly active anaerobic ammonia oxidation granular sludge from the generated nitrogen gas, preventing nitrogen interference with subsequent treatment processes. Simultaneously, the reflux function of the reflux components ensures stable biomass within reactor body 1, further improving water decomposition efficiency and the device's denitrification efficiency, while also reducing operating costs, demonstrating broad application prospects.

[0033] Preferred, such as Figure 1 As shown, the separation and sedimentation component includes a screen 4 and an effluent weir ring 5. The screen 4 is connected to the effluent outlet 3. The effluent weir ring 5 is connected to the outer wall of the reactor body 1. The effluent weir ring 5 is arranged around multiple effluent outlets 3. Multiple agitators 6 are connected to the effluent weir ring 5. The agitators 6 are used to stir the fluid so that the granular sludge settles. The bottom end of the effluent weir ring 5 is connected to a reflux component.

[0034] Specifically, the screen 4 at the outlet 3 can intercept large granular sludge particles that rise with the water flow, preventing them from being discharged along with the effluent from the outlet 3. The large granular sludge particles undergo three-phase separation through the three-phase separator 2, while the suspended small granular sludge particles are discharged through multiple outlets 3 and flow into the effluent weir ring 5. The effluent weir ring 5 not only collects the clear liquid filtered by the screen 4, but also intermittently agitates the mixture of small granular sludge particles and water through multiple agitators 6 on it. These multiple agitators 6 rapidly agitate the granular sludge particles. Stirring allows nitrogen gas to escape from the granular sludge. After multiple stirrers 6 stop stirring, the nitrogen-exposed granular sludge settles by gravity at the bottom of the effluent weir ring 5. The supernatant is discharged when multiple stirrers 6 stop stirring intermittently to avoid exceeding the suspended solids concentration in the discharged supernatant. The bottom end of the effluent weir ring 5 is connected to a return component, allowing the settled granular sludge to flow smoothly back into the reactor body 1, thereby realizing the recycling of granular sludge, ensuring the stability of biomass in the reactor body 1, and further improving the water treatment efficiency and denitrification performance of the device.

[0035] Furthermore, the stirring time of the multiple stirrers 6 is 3-7 minutes, and the intermittent sedimentation time is 30-70 minutes. Preferably, the stirring time is 5 minutes and the intermittent sedimentation time is 55 minutes.

[0036] This setup ensures that nitrogen in the granular sludge is fully released while allowing sufficient time for gravity settling. Too short a stirring time or too long an intermittent settling time may result in incomplete nitrogen release or poor granular sludge settling; conversely, too long a stirring time or too short an intermittent settling time may increase energy consumption and affect overall treatment efficiency. Therefore, by appropriately setting the stirring time and intermittent settling time, energy consumption can be minimized while ensuring treatment effectiveness.

[0037] Preferred, such as Figures 1-3 As shown, the separation and sedimentation component also includes a scraping component, which includes a retaining ring 7 and a scraper 71. Several scrapers 71 are fixedly welded to the retaining ring 7, and a drive ring 73 is welded to the scraper 71. Gears are provided on the outer wall of the drive ring 73. A drive gear 61 is welded to the bottom end of the stirrer 6. The drive gear 61 is matched with a meshing gear. A limiting groove 11 is provided on the outer wall of the reactor body 1, and the retaining ring 7 is matched and engaged in the limiting groove 11.

[0038] Specifically, after the granular sludge settles, when the agitator 6 is restarted, the drive gear 61 at its bottom meshes with the gear on the drive ring 73, causing the retaining ring 7 and scraper 71 to rotate as a whole. This, in turn, drives multiple scrapers 71 to move in a circular motion around the reactor body 1. During this circular motion, the scrapers 71 can scrape off the settled granular sludge at the bottom of the effluent weir ring 5, effectively preventing the granular sludge from accumulating in the effluent weir ring 5. The granular sludge accumulated in the effluent weir ring 5 is then returned through the return flow component. The retaining ring 7 is matched and engaged in the limiting groove 11 on the reactor body 1. The limiting groove 11 stably limits the retaining ring 7, effectively preventing the scraping component from shifting or falling off during operation, thus ensuring the stability and reliability of the scraping component. In addition, the scraper 71 is preferably made of a wear-resistant and corrosion-resistant alloy material, which can operate stably for a long time in harsh wastewater environments, extending the service life of the entire device.

[0039] Preferred, such as Figure 1 and Figure 2 As shown, the bottom end of the outlet weir ring 5 is provided with a sloping surface, and the bottom end surface of the scraper 71 matches the sloping surface at the bottom end of the outlet weir ring 5.

[0040] Specifically, the bottom surface of scraper 71 matches the slope of the bottom end of the effluent weir ring 5, making the scraper 71 smoother when scraping away settled granular sludge and reducing the likelihood of dead corners. The slope of the bottom end of the effluent weir ring 5 also guides the granular sludge towards the return component, further improving the return efficiency of the granular sludge. At the same time, the close fit between scraper 71 and the slope also enhances the scraping effect, ensuring the cleanliness of the effluent weir ring 5, thereby guaranteeing the normal operation of the entire wastewater treatment device and the quality of the effluent.

[0041] Preferred, such as Figure 3 As shown, a groove 72 is provided on the scraper 71, and the width of the groove 72 is greater than the width of the drive gear 61.

[0042] Specifically, the width of the trough 72 is greater than the width of the drive gear 61, allowing the drive gear 61 to rotate smoothly within the trough 72 without jamming or wear due to width mismatch. The width design of the trough 72 ensures a good fit between the drive gear 61 and the scraper 71, improving transmission stability and efficiency. Simultaneously, the trough 72 effectively prevents sewage or sludge from entering the gap between the drive gear 61 and the scraper 71, avoiding transmission failures caused by dirt accumulation and further extending the service life of the entire device. Furthermore, the greater width of the trough 72 provides sufficient installation and adjustment space for the drive gear 61, making assembly and maintenance of the device more convenient and efficient.

[0043] Preferred, such as Figure 1As shown, the reflux component includes a reflux pipe 8 and a mixing box 81. The reflux pipe 8 is connected to the bottom end of the outlet weir ring 5, and the bottom end of the reflux pipe 8 is connected to the mixing box 81. The mixing box 81 is connected to the inlet component.

[0044] Specifically, a portion of the water flow treated by the effluent weir ring 5 can be guided into the mixing tank 81 through the return pipe 8. In the mixing tank 81, this returned water flow can be thoroughly mixed with the new influent flow from the influent component, thereby achieving water homogenization and regulation. This return mechanism not only helps improve the treatment efficiency of the wastewater treatment device but also optimizes the effluent quality to a certain extent, ensuring that the effluent meets the expected environmental standards. At the same time, the inclusion of the return component increases the flexibility and adaptability of the wastewater treatment device, enabling it to better cope with changes in different water qualities and treatment needs.

[0045] Preferably (not shown), an agitator ring is installed inside the mixing chamber 81, and the agitator ring is connected to an external drive component.

[0046] Specifically, the agitator ring enhances the agitation of the water flow within the mixing tank 81, promoting thorough mixing of the incoming and returning water flows. Driven by an external drive component, the agitator ring can rotate or oscillate within the mixing tank 81, thereby generating eddies and turbulence in the water flow, increasing collisions and friction between the water streams, and improving mixing efficiency and uniformity. This further optimizes the water homogenization process of the wastewater treatment device, contributing to improved overall treatment performance and effluent quality. Furthermore, the agitator ring's driving method is flexible and can be adjusted and optimized according to actual treatment needs to meet the treatment requirements under different water quality conditions.

[0047] Preferred, such as Figure 1 As shown, the water inlet component includes a water inlet pipe 9, and the mixing tank 81 is connected to the water inlet pipe 9. The water inlet pipe 9 is located at the bottom of the reactor body 1. The water inlet pipe 9 is used to introduce water into the bottom of the reactor body 1 and mix the water with the refluxed solid and liquid phases.

[0048] Specifically, the design of the inlet pipe 9 fully considers the mixing effect after the water flows into the reactor body 1. By placing the inlet pipe 9 at the bottom of the reactor body 1, it is ensured that the water flows smoothly into the mixing tank 81 under gravity, allowing for sufficient contact and mixing with the returned solid and liquid phases. This not only improves mixing efficiency but also helps reduce the residence time and dead zone of the water within the reactor body 1, further enhancing the treatment effect of the wastewater treatment device. Simultaneously, the material and connection method of the inlet pipe 9 have been carefully selected and optimized to ensure its stability and durability during use, thereby extending the service life of the entire wastewater treatment device.

[0049] Preferred, such as Figure 1 As shown, the outlet end of the water inlet pipe 9 is a tubular body with multiple water outlet holes.

[0050] Specifically, the water disperses more evenly upon entering the mixing tank 81, further enhancing the mixing effect between the water and the solid and liquid phases. The multiple water outlets effectively reduce the impact force of the water flow, preventing excessive disturbance to other substances within the mixing tank 81, thus ensuring the stability and continuity of the mixing process. Simultaneously, the shape of the tubular outlet end easily matches the internal structure of the mixing tank 81, allowing water to flow more smoothly into the mixing area, further improving mixing efficiency.

[0051] Preferably (not shown in the figure), the outlet end of the water inlet pipe 9 is an annular body with multiple outlet holes.

[0052] Specifically, the annular shape at the outlet of the inlet pipe 9 covers a larger area, allowing the water to be more evenly distributed across multiple locations in the mixing tank 81 during outflow. This not only further enhances the mixing uniformity between the water and the solid and liquid phases but also helps improve the overall treatment efficiency and stability of the wastewater treatment device. Simultaneously, the multiple outlet holes on the annular shape effectively disperse the impact force of the water flow, ensuring a smooth mixing process.

[0053] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An integrated anaerobic ammonia oxidation reactor for collecting granular sludge, comprising a reactor body (1), characterized in that: A three-phase separator (2) is installed at the top of the reactor body (1), and multiple outlets (3) are provided at the top of the reactor body (1). The three-phase separator (2) is used for the preliminary separation of gas phase, solid phase and liquid phase in the fluid after reaction. The outer wall of the reactor body (1) is connected to a separation and sedimentation component, which is connected to a reflux component. The separation and sedimentation component is used for intermittent secondary sedimentation of the solid phase, and the reflux component is used to reflux the solid and liquid phases. The separation and sedimentation component includes a screen (4), an effluent weir ring (5), and a scraping component. The effluent outlet (3) is connected to a screen (4). The effluent weir ring (5) is connected to the outer wall of the reactor body (1). The effluent weir ring (5) is arranged around multiple effluent outlets (3). Multiple agitators (6) are connected to the effluent weir ring (5). The agitators (6) are used to stir the fluid to settle the granular sludge. The bottom end of the effluent weir ring (5) is connected to the reflux component. The scraping component includes a retaining ring (7). The reactor body (1) is equipped with a scraper (71), and a scraper (71) is fixedly welded to the retaining ring (7). A drive ring (73) is welded to the scraper (71). A gear is provided on the outer wall of the drive ring (73). A drive gear (61) is welded to the bottom end of the agitator (6). The drive gear (61) is matched with a meshing gear. A limiting groove (11) is provided on the outer wall of the reactor body (1). The retaining ring (7) is matched and snapped into the limiting groove (11). A slope surface is provided at the bottom end of the effluent weir ring (5). The bottom end surface of the scraper (71) matches the slope surface at the bottom end of the effluent weir ring (5). A groove (72) is provided on the scraper (71). The width of the groove (72) is greater than the width of the drive gear (61). The bottom end of the reactor body (1) is connected to the water inlet component, which is connected to the reflux component. The water inlet component is used to introduce water into the bottom of the reactor body and mix the water with the refluxed solid and liquid phases.

2. The integrated anaerobic ammonia oxidation reactor for collecting granular sludge according to claim 1, characterized in that: The reflux component includes a reflux pipe (8) and a mixing box (81). The reflux pipe (8) is connected to the bottom end of the outlet weir ring (5). The bottom end of the reflux pipe (8) is connected to the mixing box (81). The mixing box (81) is connected to the inlet component.

3. The integrated anaerobic ammonia oxidation reactor for collecting granular sludge according to claim 2, characterized in that: An agitator ring is installed inside the mixing chamber (81), and the agitator ring is connected to an external drive component.

4. The integrated anaerobic ammonia oxidation reactor for collecting granular sludge according to claim 3, characterized in that: The water inlet component includes a water inlet pipe (9), and the mixing tank (81) is connected to the water inlet pipe (9). The water inlet pipe (9) is located at the bottom of the reactor body (1). The water inlet pipe (9) is used to introduce water into the bottom of the reactor body and mix the water with the refluxed solid and liquid phases.

5. The integrated anaerobic ammonia oxidation reactor for collecting granular sludge according to claim 4, characterized in that: The outlet end of the water inlet pipe (9) is a tubular body, and multiple water outlet holes are provided on the tubular body.

6. The integrated anaerobic ammonia oxidation reactor for collecting granular sludge according to claim 5, characterized in that: The outlet end of the water inlet pipe (9) is an annular body, and multiple outlet holes are provided on the annular body.

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