High concentration aquaculture wastewater treatment device

Abstract

High concentration aquaculture wastewater treatment device, wastewater is sequentially through coagulation zone A, flocculation zone B and biochemical zone C, respectively, high speed stirring coagulation, low method speed flocculation and microbial treatment, including wastewater tank, multistage processing assembly, dosing tank, switch board and clean water tank, multistage processing assembly right including support frame, multistage processing box, aeration assembly and biofilm assembly, wherein stirring assembly, can fully stir wastewater, ensure that the coagulant and wastewater instantaneous, uniform mixing, form uniform microfloc, avoid the bottom settlement, through the form of micro electrode plate + stirring, create a unique pulse gathering environment, can promote the colloidal particle destabilization aggregation, provide gentle conditions for the growth of floc dense, finally through the biofilm assembly for biofilm assembly formed stable and abundant microbial community, improve the wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a device for treating high-concentration aquaculture wastewater. Background Technology

[0002] High-concentration livestock wastewater mainly refers to wastewater discharged from large-scale livestock farms such as pig, cattle, and chicken farms. Its hazards are mainly as follows: First, eutrophication of water bodies results in wastewater containing extremely high concentrations of nitrogen (ammonia nitrogen, organic nitrogen) and phosphorus. When these nutrients enter surface water bodies such as rivers and lakes, they stimulate the rampant growth of algae and aquatic plants. The massive proliferation of algae consumes dissolved oxygen in the water and blocks sunlight, causing other aquatic organisms (such as fish) to die due to lack of oxygen and light.

[0003] Second, wastewater depletes dissolved oxygen in water bodies. Wastewater contains large amounts of organic matter, such as feces, uneaten feed, and urine. During microbial decomposition, these substances consume significant amounts of dissolved oxygen. When the rate of oxygen consumption far exceeds the rate of reoxygenation, the water body falls into a state of anoxic or anaerobic conditions. Under anaerobic conditions, the decomposition of organic matter produces toxic and harmful gases such as hydrogen sulfide, ammonia, and methane, causing the water to turn black and smell foul.

[0004] Third, antibiotic and hormone pollution: Antibiotics and hormones used in modern aquaculture are excreted in feces and urine. Even at low concentrations, these substances persist in the environment for extended periods, potentially inducing antibiotic resistance in microorganisms and disrupting microbial communities. Based on these hazards, current aquaculture wastewater treatment methods generally employ solid-liquid separation + anaerobic digestion + aerobic treatment + natural / advanced treatment. Regardless of the method, energy consumption and cost must be considered. Existing methods using air flotation machines only provide rough treatment, resulting in wastewater containing large amounts of organic matter. Furthermore, traditional coagulation and flocculation processes rely on mechanical stirring, leading to uneven mixing and inconsistent floc size and density, resulting in slow settling, unstable effects, and easy accumulation at the bottom. This exacerbates the cost and energy consumption of wastewater treatment. Utility Model Content

[0005] To overcome the aforementioned technical deficiencies, this utility model adopts the following technical solution: A high-concentration aquaculture wastewater treatment device includes a wastewater tank, a multi-stage treatment assembly, a dosing tank, a power distribution cabinet, and a clear water tank. The wastewater tank is connected to an external air flotation unit via a collection pipe and also connected to the multi-stage treatment assembly via an inlet pipe. The multi-stage treatment assembly includes a support frame, a multi-stage treatment chamber, an aeration assembly, and a biofilm assembly. The support frame is located between the wastewater tank and the clear water tank and supports the multi-stage treatment chamber. The power distribution cabinet and the dosing tank are fixedly installed on one side of the support frame. The multi-stage treatment chamber has an upward-facing opening and is internally divided into a coagulation zone A, a flocculation zone B, and a biochemical zone C by partitions. A first stirring motor and a second stirring motor are mounted on the upper part of the multi-stage treatment chamber via crossbeams. The first stirring motor and the second stirring motor are located above the coagulation zone A and the flocculation zone B, respectively. The coagulation zone A is equipped with a stirring assembly. The bottom of the flocculation zone B is conical. Microelectrode plates are embedded in the inner wall of the flocculation zone B, and the opposite microelectrode plates have opposite polarities. A conical seat is also installed at the bottom conical structure of the flocculation zone B, and the conical seat is also connected to the second stirring motor. The biochemical zone C is equipped with a biofilm assembly. The aeration assembly is also installed on the outside of the multi-stage treatment tank, and the output end of the aeration assembly extends into the biochemical zone C. The dosing tank is also connected to the backwashing pipeline through a dosing pipe. The backwashing pipeline also partially extends into the biochemical zone C, and a metering pump is also installed on the dosing pipe. The biochemical zone C is also connected to the clear water tank through an output pipe. The power distribution cabinet is electrically connected to the aeration assembly, the first stirring motor, the second stirring motor, the microelectrode plates, and the metering pump.

[0006] Preferably, the support frame is also equipped with a first sludge pump, a second sludge pump, and a third sludge pump. The output end of the first sludge pump is connected to a wastewater tank via a pipe, and the output end of the first sludge pump extends into the coagulation zone A via a pipe. The input end of the second sludge pump is connected to the coagulation zone A via a pipe, and the output end of the second sludge pump is connected to the flocculation zone B via a pipe. The input end of the third sludge pump is connected to the flocculation zone B via a pipe, and the output end of the third sludge pump is connected to the biochemical zone C via a pipe. The bottom of the flocculation zone B is also connected to a solid-liquid separator via a pipe. The first sludge pump, the second sludge pump, and the third sludge pump are electrically connected to the power distribution cabinet.

[0007] Preferably, the output ends of the first stirring motor and the second stirring motor are both fixedly connected to the corresponding first stirring shaft and the second stirring shaft. The first stirring shaft is also connected to the stirring assembly, and the bottom of the first stirring shaft is also arrayed with multiple scrapers. The second stirring shaft is also provided with multiple blades, and the bottom of the second stirring shaft is also connected to a conical seat. The conical seat is a porous hollow structure, and a spiral scraper is fixedly provided on the conical surface of the conical seat.

[0008] Preferably, the stirring assembly includes a gear ring, which is fixedly installed at the bottom of the crossbeam, and a first stirring shaft passes through the center of the gear ring. A rotating plate is also fixedly installed on the first stirring shaft. Multiple extension plates are arranged in a circular array on the rotating plate. The rotating plate is located below the gear ring. A transmission column is also vertically and movably installed on each extension plate. A first gear and a second gear are equipped at both ends of the transmission column. The first gear meshes with the outer ring of the gear ring. A bottom column is also fixedly connected to the bottom end of each extension plate away from the first stirring shaft. A third gear is movably installed on the bottom column. The third gear meshes with the second gear. A rotating arm is also fixedly connected to the bottom surface of the third gear. A rotating shaft is fixedly connected to the bottom of the rotating arm. Multiple stirring blades are also provided on the rotating shaft. The bottom end face of each stirring blade is located above a scraper.

[0009] Preferably, the biofilm assembly includes an attachment frame made of polyethylene with a hollow skeleton. The attachment frame has multiple connecting columns arranged symmetrically in an array, and multiple anti-corrosion rods are spaced apart between each pair of symmetrical connecting columns. The gaps between adjacent anti-corrosion rods are used to fill microbial carriers, allowing microorganisms in the wastewater of biochemical zone C to attach and form a microbial film.

[0010] Preferably, the aeration assembly includes an aeration blower and multiple microporous aerators. The aeration blower is mounted on a support frame, and the output end of the aeration blower is connected to an aeration pipe. The output end of the aeration pipe extends into the biochemical zone C, and the end extending into the biochemical zone C is connected to multiple microporous aerators. The microporous aerators are located below the biofilm assembly, and the aeration blower is also electrically connected to the power distribution cabinet.

[0011] Preferably, the clean water tank is also connected to a backwash pump via a circulation pipe, the backwash pump is also connected to a security filter, the output end of the security filter is also connected to a flushing pipe, and the backwash pump and the security filter are both electrically connected to the power distribution cabinet.

[0012] The beneficial effects of this utility model are as follows: The device of this invention features a stirring assembly where a rotating plate drives an extension plate to rotate under the action of a first stirring motor. During this rotation, a first gear drives a second gear, which in turn drives a third gear, allowing the rotating arm to rotate synchronously in multiple positions. The rotating shaft not only revolves around the sun but also rotates on its own axis, thus thoroughly stirring the wastewater and ensuring instantaneous and uniform mixing of the coagulant and wastewater, forming uniform micro-flocs and preventing bottom settling. Secondly, the combination of microelectrode plates and mechanical stirring creates a unique pulse aggregation environment, promoting the destabilization and aggregation of colloidal particles. Slow centrifugal force provides gentle conditions for the growth and compaction of the flocs. Finally, the biofilm assembly provides a large attachment area (high specific surface area carrier) for microorganisms, forming a stable and rich microbial community, thereby efficiently degrading organic matter. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the device of this utility model; Figure 2 This is a front view structural diagram of the device of this utility model; Figure 3 This is a rear view schematic diagram of the device of this utility model; Figure 4 This is a top view of the device of this utility model; Figure 5 for Figure 4 A sectional view along line AA. Figure 6 This is a partially enlarged schematic diagram of the stirring assembly; In the diagram: 1. Wastewater tank; 2. Multi-stage treatment assembly; 3. Dosing tank; 4. Electrical control cabinet; 5. Clean water tank; 6. Collection pipe; 7. Inlet pipe; 20. Support frame; 21. Multi-stage treatment box; 22. Aeration assembly; 23. Biofilm assembly; 24. Crossbeam; 8. First stirring motor; 9. Second stirring motor; 10. Stirring assembly; 11. Microelectrode plate; 12. Conical seat; 13. Dosing pipeline; 14. Backwashing pipeline; 15. Metering pump; 16. First sludge pump; 17. Second sludge pump; 18. Third sludge pump; 19. First stirring shaft; 25. Second stirring shaft; 26. Scraper. 6. Blade 27. Spiral scraper 28. Gear ring 101. Rotating plate 102. Extension plate 103. Transmission column 104. First gear 105. Second gear 106. Bottom column 107. Third gear 108. Rotating arm 109. Rotating shaft 110. Agitator 111. Attachment frame 230. Connecting column 231. Corrosion-resistant rod 232. Aeration blower 220. Microporous aerator 221. Aeration pipe 222. Circulation pipe 29. Backwash pump 30. Security filter 31. Output pipe 32. Solid-liquid separator 33. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0015] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0016] Example 1: See appendix Figure 1-6A high-concentration aquaculture wastewater treatment device includes a wastewater tank 1, a multi-stage treatment assembly 2, a dosing tank 3, a power distribution cabinet 4, and a clean water tank 5. The wastewater tank 1 is connected to an external air flotation unit via a collection pipe 6, and is also connected to the multi-stage treatment assembly 2 via an inlet pipe 7. The multi-stage treatment assembly 2 includes a support frame 20, a multi-stage treatment box 21, an aeration assembly 22, and a biofilm assembly 23. The support frame 20 is located between the wastewater tank 1 and the clean water tank 5 and supports the multi-stage treatment box 21. The power distribution cabinet 4 and the dosing tank 3 are fixedly installed on one side of the support frame 20. The multi-stage treatment box 21 has an upward-facing opening and is internally divided into a coagulation zone A, a flocculation zone B, and a biochemical zone C by partitions. A first stirring motor 8 and a second stirring motor 9 are mounted on the upper part of the multi-stage treatment box 21 via a crossbeam 24. The first stirring motor 8 and the second stirring motor 9 are located above the coagulation zone A and the flocculation zone B, respectively. The coagulation zone A is equipped with a stirring assembly 10. The bottom of the flocculation zone B is conical. Microelectrode plates 11 are embedded in the inner wall of the flocculation zone B, and the opposite microelectrode plates 11 have opposite polarities. A conical seat 12 is also installed at the bottom conical structure of the flocculation zone B. The conical seat 12 is also connected to the second stirring motor 9. The biochemical zone C is equipped with a biofilm assembly 23. The aeration assembly 22 is also installed on the outside of the multi-stage treatment tank 21, and the output end of the aeration assembly 22 extends into the biochemical zone C. The dosing tank 3 is also connected to the backwashing pipe 14 through the dosing pipe 13. The backwashing pipe 14 is also connected to the clear water tank 5 and the biochemical zone C. A metering pump 15 is also installed on the dosing pipe 13. The biochemical zone C is also connected to the clear water tank 5 through the output pipe 32. The power distribution cabinet 4 is electrically connected to the aeration assembly 22, the first stirring motor 8, the second stirring motor 9, the microelectrode plate 11, and the metering pump 15.

[0017] Through the above technical solution, wastewater first enters the multi-stage treatment tank 21 and passes through the coagulation zone A, flocculation zone B, and biochemical zone C in sequence. Wastewater in flocculation zone B can re-enter coagulation zone A under the action of a circulating pump, and wastewater treated in biochemical zone C can also enter coagulation zone A or flocculation zone B. Repeated circulation can better improve the wastewater treatment effect. Secondly, in coagulation zone A, high-speed stirring is mainly carried out by the stirring component 10. This stirring component 10 can rotate on its own axis while revolving around the sun, and this process can stir multiple positions, replacing the traditional stirring shaft. This allows for thorough stirring of the wastewater, ensuring instantaneous and uniform mixing of the coagulant and wastewater, forming uniform micro-flocs, and avoiding bottom sedimentation. Secondly, the combination of microelectrode plates and mechanical stirring creates a unique pulse aggregation environment, which can promote the destabilization and aggregation of colloidal particles. Slow centrifugal force provides mild conditions for the growth and compaction of flocs. Finally, the biofilm component provides a huge attachment area (high specific surface area carrier) for microorganisms, forming a stable and rich microbial community, thereby efficiently degrading organic matter.

[0018] See appendix Figure 2-3 The support frame 20 is also equipped with a first sludge pump 16, a second sludge pump 17, and a third sludge pump 18. The output end of the first sludge pump 16 is connected to the wastewater tank 1 via a pipe, and the output end of the first sludge pump 16 extends into the coagulation zone A via a pipe. The input end of the second sludge pump 17 is connected to the coagulation zone A via a pipe, and the output end of the second sludge pump 17 is connected to the flocculation zone B via a pipe. The input end of the third sludge pump 18 is connected to the flocculation zone B via a pipe, and the output end of the third sludge pump 18 is connected to the biochemical zone C via a pipe. The bottom of the flocculation zone B is also connected to the solid-liquid separator 33 via a pipe. The first sludge pump 16, the second sludge pump 17, the third sludge pump 18, and the solid-liquid separator 33 are also electrically connected to the power distribution cabinet 4.

[0019] The above technical solution enables the transfer of wastewater between coagulation zone A, flocculation zone B, and biochemical zone C. During this process, wastewater from flocculation zone B can be re-entered into coagulation zone A via an external pump, and wastewater from biochemical zone C can similarly enter coagulation zone A or flocculation zone B, thus achieving cyclic treatment and improving the wastewater treatment effect.

[0020] See appendix Figure 5 The output ends of the first stirring motor 8 and the second stirring motor 9 are fixedly connected to the corresponding first stirring shaft 19 and second stirring shaft 25. The first stirring shaft 19 is also connected to the stirring assembly 10, and the bottom of the first stirring shaft 19 is also arrayed with multiple scrapers 26. The second stirring shaft 25 is also provided with multiple blades 27, and the bottom of the second stirring shaft 25 is also connected to the conical seat 12. The conical seat 12 is a porous hollow structure, and the conical surface of the conical seat 12 is also fixedly provided with a spiral scraper 28.

[0021] Through the above technical solution, during the stirring process of the stirring component 10, in order to prevent sedimentation, the bottom of the coagulation zone A can be cleaned by the scraper 26, which can prevent impurities or flocs from accumulating. At the same time, the scraped impurities and other sediments can be resuspended during the revolution and rotation of the stirring component 10, thus avoiding bottom sedimentation. In the flocculation zone B, the second stirring shaft 25 rotates slowly, which makes the sediment in the pretreated wastewater better flocculate and settle. The bottom sedimentation mixture is sent into the solid-liquid separator 33 for separation and discharge by the spiral scraper 28 during rotation. The separated wastewater re-enters the flocculation zone B for flocculation, further improving the wastewater treatment effect.

[0022] See appendix Figure 6The stirring assembly 10 includes a gear ring 101, which is fixedly installed at the bottom of the crossbeam 24. A first stirring shaft 19 passes through the center of the gear ring 101. A rotating plate 102 is also fixedly installed on the first stirring shaft 19. Multiple extension plates 103 are arranged in a circular array on the rotating plate 102. The rotating plate 102 is located below the gear ring 101. A transmission column 104 is vertically and movably installed on each extension plate 103. Both ends of the transmission column 104 are equipped with a first gear 105 and a second gear 106. 05 meshes with the outer ring of the gear ring 101, and the bottom of each extension plate 103 away from the first stirring shaft 19 is also fixedly connected to the bottom of the bottom of the extension plate 103. The bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the bottom of the scraper 26.

[0023] Through the above technical solution, when the first stirring motor 8 starts, the first stirring shaft 19 drives the rotating plate 102 to rotate, and the rotating plate 102 drives the extension plate 103 to rotate. During the rotation process, the first gear 105 drives the second gear 106 to rotate, and the second gear 106 drives the third gear 108 to rotate, so that the rotating arm 109 can rotate synchronously in multiple positions. During the rotation of the rotating arm 109, the rotating shaft 110 can be in different positions and is always rotating on its own axis. During this process, the rotating shaft 110 not only revolves around the sun but also rotates on its own axis. This can fully stir the wastewater, ensure the instantaneous and uniform mixing of the coagulant and the wastewater, form uniform micro-flocs, and avoid bottom settling.

[0024] See appendix Figure 5 The biofilm component 23 includes an attachment frame 230, which is made of polyethylene and has a hollow skeleton. The attachment frame 230 has multiple connecting columns 231 arranged symmetrically in the upper and lower sections, and multiple anti-corrosion rods 232 are spaced apart between each of the symmetrical connecting columns 231. The gaps between adjacent anti-corrosion rods 232 are used to fill microbial carriers, so that microorganisms in the sewage in the biochemical zone C can attach and form a microbial film.

[0025] Through the above technical solution, the gaps between multiple anti-corrosion rods 232 can be filled with microbial carriers, providing a huge attachment area for microorganisms. Under the action of the aeration component 22, the rising bubbles also continuously flush the biofilm component, effectively preventing blockage and promoting the shedding of aging biofilm, thus maintaining the high activity of the biofilm.

[0026] The aeration assembly 22 mainly provides dissolved oxygen. It includes an aeration blower 220 and multiple microporous aerators 221. The aeration blower 220 is mounted on the support frame 20, and the output end of the aeration blower 220 is connected to an aeration pipe 222. The output end of the aeration pipe 222 extends into the biochemical zone C, and the end extending into the biochemical zone C is connected to multiple microporous aerators 221. The microporous aerators 221 are located below the attachment frame 230. The aeration blower 220 is also electrically connected to the power distribution cabinet 4.

[0027] Through the above technical solution, the dissolved oxygen generated by the aeration blower 220 can be transported to each microporous aerator 221 through the aeration pipe 222, and the microporous aerators 221 are all located at the bottom of the attachment frame 230. This ensures that the rising bubbles can continuously flush the biofilm components, thereby efficiently degrading organic matter.

[0028] See appendix Figure 2-3 The clean water tank 5 is also connected to the backwash pump 30 through the circulation pipe 29. The backwash pump 30 is also connected to the security filter 31. The output end of the security filter 31 is also connected to the flushing pipe 14. The backwash pump 30 and the security filter 31 are both electrically connected to the power distribution cabinet 4.

[0029] Through the above technical solution, the backwash pump 30 can inject clean water from the clean water tank 5 into the biochemical zone C. The security filter 31 can remove residual microparticles, suspended solids, colloids and other impurities in the water, further reducing the residue in the wastewater during the backwashing process and ensuring the wastewater treatment effect.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A high concentration aquaculture wastewater treatment apparatus, characterized by, The system includes a wastewater tank (1), a multi-stage treatment assembly (2), a dosing tank (3), a power distribution cabinet (4), and a clean water tank (5). The wastewater tank (1) is connected to an external air flotation unit via a collection pipe (6). The wastewater tank (1) is also connected to the multi-stage treatment assembly (2) via an inlet pipe (7). The multi-stage treatment assembly (2) includes a support frame (20), a multi-stage treatment tank (21), an aeration assembly (22), and a biofilm assembly (23). The support frame (20) is located between the wastewater tank (1) and the clean water tank (5), and is used for... The multi-stage treatment box (21) is supported by a power distribution cabinet (4) and a dosing tank (3) fixedly installed on one side of the support frame (20). The multi-stage treatment box (21) is open upwards and is divided into a coagulation zone A, a flocculation zone B, and a biochemical zone C by partitions. The upper part of the multi-stage treatment box (21) is also supported by a crossbeam (24) for a first stirring motor (8) and a second stirring motor (9). The first stirring motor (8) and the second stirring motor (9) are located on the upper part of the coagulation zone A and the flocculation zone B, respectively. An internal stirring assembly (10) is also provided. The bottom of the flocculation zone B is a conical structure. Microelectrode plates (11) are embedded in the inner wall of the flocculation zone B, and the polarities of the opposite microelectrode plates (11) are opposite. A conical seat (12) is also provided at the conical structure at the bottom of the flocculation zone B. The conical seat (12) is also connected to the second stirring motor (9). A biofilm assembly (23) is provided in the biochemical zone C. The aeration assembly (22) is also provided on the outside of the multi-stage treatment box (21), and the output end of the aeration assembly (22) extends outward. Entering the biochemical zone C, the dosing tank (3) is also connected to the backwashing pipe (14) through the dosing pipe (13). The backwashing pipe (14) is also connected to the clear water tank (5) and the biochemical zone C. A metering pump (15) is also installed on the dosing pipe (13). The biochemical zone C is also connected to the clear water tank (5) through the output pipe (32). The power distribution cabinet (4) is electrically connected to the aeration component (22), the first stirring motor (8), the second stirring motor (9), the microelectrode plate (11), and the metering pump (15).

2. The high concentration aquaculture wastewater treatment device according to claim 1, characterized in that, The support frame (20) is also equipped with a first sludge pump (16), a second sludge pump (17) and a third sludge pump (18). The output end of the first sludge pump (16) is connected to the wastewater tank (1) through a pipe. The output end of the first sludge pump (16) extends into the coagulation zone A through a pipe. The input end of the second sludge pump (17) is connected to the coagulation zone A through a pipe. The output end of the second sludge pump (17) is connected to the flocculation zone B through a pipe. The input end of the third sludge pump (18) is connected to the flocculation zone B through a pipe. The output end of the third sludge pump (18) is connected to the biochemical zone C through a pipe. The bottom of the flocculation zone B is also connected to the solid-liquid separator (33) through a pipe. The first sludge pump (16), the second sludge pump (17), the third sludge pump (18) and the solid-liquid separator (33) are also electrically connected to the power distribution cabinet (4).

3. The high-density aquaculture wastewater treatment device according to claim 1, characterized in that, The output ends of the first stirring motor (8) and the second stirring motor (9) are fixedly connected to the corresponding first stirring shaft (19) and second stirring shaft (25). The first stirring shaft (19) is also connected to the stirring assembly (10), and the bottom of the first stirring shaft (19) is also arrayed with multiple scrapers (26). The second stirring shaft (25) is also provided with multiple blades (27), and the bottom of the second stirring shaft (25) is also connected to the conical seat (12). The conical seat (12) is a porous hollow structure, and the conical surface of the conical seat (12) is also fixedly provided with a spiral scraper (28).

4. The high-density aquaculture wastewater treatment device according to claim 3, characterized in that, The stirring assembly (10) includes a gear ring (101), which is fixedly installed at the bottom of the crossbeam (24), and a first stirring shaft (19) passes through the center of the gear ring (101). A rotating plate (102) is also fixedly installed on the first stirring shaft (19). Multiple extension plates (103) are arranged in a circular array on the rotating plate (102). The rotating plate (102) is located below the gear ring (101). A transmission column (104) is also vertically and movably installed on each extension plate (103). A first gear (105) and a second gear (106) are mounted at both ends of the transmission column (104). 05) It meshes with the outer ring of the gear ring (101), and the bottom of each extension plate (103) away from the first stirring shaft (19) is also fixedly connected to the bottom column (107). The bottom column (107) is movably mounted with a third gear (108). The third gear (108) also meshes with the second gear (106), and the bottom surface of the third gear (108) is also fixedly connected to a rotating arm (109). The bottom of the rotating arm (109) is fixedly connected to a rotating shaft (110). The rotating shaft (110) is also provided with multiple stirring paddles (111). The bottom end face of each stirring paddle (111) is located above the scraper (26).

5. The high-density aquaculture wastewater treatment device according to claim 1, characterized in that, The biofilm component (23) includes an attachment frame (230), which is made of polyethylene and has a hollow skeleton. The attachment frame (230) has multiple connecting columns (231) arranged symmetrically in the upper and lower parts, and multiple anti-corrosion rods (232) are spaced apart between each symmetrical connecting column (231). The gaps between adjacent anti-corrosion rods (232) are used to fill microbial carriers, so that microorganisms in the sewage in the biochemical zone C can attach and form a microbial film.

6. The high-concentration aquaculture wastewater treatment device according to claim 1, characterized in that, The aeration assembly (22) includes an aeration blower (220) and multiple microporous aerators (221). The aeration blower (220) is mounted on a support frame (20), and the output end of the aeration blower (220) is connected to an aeration pipe (222). The output end of the aeration pipe (222) extends into the biochemical zone C, and the end extending into the biochemical zone C is connected to multiple microporous aerators (221). The microporous aerators (221) are located below the attachment frame (230). The aeration blower (220) is also electrically connected to the power distribution cabinet (4).

7. The device for treating high-density aquaculture wastewater according to claim 1, characterized in that, The clean water tank (5) is also connected to the backwash pump (30) through the circulation pipe (29). The backwash pump (30) is also connected to the security filter (31). The output end of the security filter (31) is also connected to the flushing pipe (14). The backwash pump (30) and the security filter (31) are both electrically connected to the power distribution cabinet (4).

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