Full-amount water circulation biofloc three-dimensional shrimp breeding system

Abstract

The utility model provides a full-amount water circulation biofloc three-dimensional shrimp breeding system which comprises a breeding pond, a vertical flow sedimentation pond, a biochemical pond, a microfilter and a power device which are sequentially arranged, a detection control system is arranged in the breeding pond, a curtain type MABR membrane assembly is arranged on the periphery of the breeding pond, and a three-dimensional oxygen supply biochemical MABR membrane device is arranged in the middle of the breeding pond. The curtain type MABR membrane assembly treats water quality while supplying oxygen to the shrimps, and the three-dimensional oxygen supply biochemical MABR membrane device provides an inhabiting place for the shrimps while supplying oxygen to the shrimps, so that high-density culture is realized; the three-dimensional oxygen supply biochemical MABR membrane device comprises a plurality of layers of oxygen supply membrane assemblies which are arranged in a three-dimensional manner, and each layer of oxygen supply membrane assembly is provided with an oxygen supply area, a feed receiving area, a passing area and a discharge channel. According to the utility model, a good water circulation system is formed, the discharge of tail water is reduced, the breeding density and the feed utilization rate are improved, and the breeding cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture equipment technology, and in particular to a three-dimensional shrimp farming system with full-volume water circulation and biofloc technology. Background Technology

[0002] The global shrimp industry has become a pillar sector of aquaculture, with an annual output of over 5 million tons. Industrialized farming is gradually replacing traditional methods, but technological bottlenecks are hindering the industry's sustainable development.

[0003] Currently, shrimp farmers largely rely on water changes to maintain a clean aquaculture environment. However, the lack of a proper circulating water system not only increases farming costs but also exacerbates environmental pollution through wastewater discharge. Secondly, the low level of automation in shrimp farms makes it difficult to balance monitoring accuracy with cost. Farmers often rely on their experience to diagnose and address problems, failing to digitize data and resulting in low efficiency and significant challenges for large-scale farming. Furthermore, the lack of timely monitoring and a clean living environment makes shrimp susceptible to bacterial infections. To mitigate losses, some farmers overuse antibiotics, seriously threatening food safety and leading to new and frequent disease outbreaks. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model proposes a three-dimensional shrimp farming system with full-volume water circulation and bioflocs, aiming to solve the problems of imperfect circulating water systems, low level of intelligence, and easy outbreaks of bacterial infections in shrimp.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a full-volume water circulation biofloc three-dimensional shrimp farming system, comprising a farming pond, a vertical flow sedimentation pond, a biological treatment pond, a microfilter, and a power unit arranged sequentially. The farming pond includes curtain-type MABR membrane modules arranged around the perimeter and a three-dimensional oxygen supply biochemical MABR membrane device arranged in the center. The curtain-type MABR membrane modules treat the water quality while supplying oxygen to the shrimp, and the three-dimensional oxygen supply biochemical MABR membrane device provides a habitat for the shrimp while supplying oxygen. The three-dimensional oxygen supply biochemical MABR membrane device includes several layers of oxygen supply membrane modules arranged vertically. Each oxygen supply membrane module has an oxygen supply zone, a feed receiving zone, and a passage zone. The feed receiving zones of each layer of the oxygen supply membrane module are staggered. A discharge channel for settling excrement is provided in the center of the three-dimensional oxygen supply biochemical MABR membrane device. A detection and control system is installed in the farming pond. The detection and control system, in conjunction with the power unit, re-transports the farmed water treated by the vertical flow sedimentation pond and the biological treatment pond back into the farming pond.

[0006] Furthermore, the biological treatment tank is equipped with a deoxygenation tank, an anoxic tank, an aerobic tank, and a sedimentation tank. The deoxygenation tank, anoxic tank, and aerobic tank are respectively equipped with a first MABR membrane module, a second MABR membrane module, and a third MABR membrane module. The deoxygenation tank is provided with an inlet. The biological treatment tank is connected to the vertical flow sedimentation tank through the inlet. The bottom of the sedimentation tank is provided with a biological treatment tank outlet.

[0007] Based on the above, the first MABR membrane module supplies a small amount of air. Microorganisms attached to the first MABR membrane module survive by consuming the abundant oxygen in the aquaculture water, thereby reducing the dissolved oxygen content and preventing excessive oxygen levels that could disrupt the biochemical environment of the downstream anoxic and aerobic tanks. The second and third MABR membrane modules in the anoxic and aerobic tanks, by controlling their air output, directly transfer oxygen through the membrane tubes in parallel with nano-microbubble oxygen transfer, improving oxygen transfer efficiency and the water's oxygen utilization rate, thus significantly reducing energy consumption. The second and third MABR membrane modules are covered with nitrifying and denitrifying bacteria with different oxygen requirements, degrading ammonia nitrogen and nitrite in the aquaculture water. Meanwhile, the sedimentation tank allows for secondary sedimentation of excrement and sludge, yielding a supernatant after sedimentation.

[0008] Furthermore, the power unit includes a circulation pump, an oxygenation pump, and an ultraviolet disinfection device. One end of the ultraviolet disinfection device is connected to the drain outlet of the biological treatment tank, and the other end is connected to the circulation pump. The circulation pump is connected to the aquaculture tank through a circulation pipe, and the oxygenation pump is connected to the aquaculture tank and the biological treatment tank through an air pipe.

[0009] Furthermore, the upper end of the vertical flow sedimentation tank is provided with a sedimentation tank inlet and a sedimentation tank outlet, the lower end of the vertical flow sedimentation tank is provided with a sedimentation tank sludge outlet, and the bottom of the vertical flow sedimentation tank is a cone bottom.

[0010] Based on the above, the conical bottom of the vertical flow sedimentation tank can efficiently collect the excrement discharged from the aquaculture pond and periodically discharge the excrement through natural sedimentation; the supernatant obtained after sedimentation in the vertical flow sedimentation tank enters the biological tank through the outlet of the sedimentation tank; the sewage outlet of the sedimentation tank is used to discharge the excrement collected by the vertical flow sedimentation tank.

[0011] Based on the above, after the supernatant from the sedimentation tank in the biological treatment tank is disinfected by the ultraviolet disinfection device, it can be returned to the aquaculture tank by the circulation pump, forming a good water circulation. The oxygenation pump is used to supply oxygen to the aquaculture tank and the biological treatment tank.

[0012] Furthermore, the power unit also includes an air-source heat pump, the inlet of which is connected to the outlet of the circulation pump, and the outlet of which is connected to the circulation pipe.

[0013] Based on the above, the air source heat pump can ensure the aquaculture temperature in different climates and temperatures, enabling uninterrupted aquaculture throughout the year and improving aquaculture production capacity.

[0014] Furthermore, the oxygen supply membrane assembly includes a membrane cavity and oxygen supply membrane walls on both sides of the membrane cavity, and a biofilm is attached to the oxygen supply membrane walls.

[0015] Based on the above, the biofilm on the oxygen supply membrane wall can provide food for shrimp and reduce farming costs.

[0016] Furthermore, an overflow observation port is provided on the side of the aquaculture pond.

[0017] Based on the above, the overflow observation port is used to control the highest water level of the aquaculture pond, and the detached shrimp shells will gather near the overflow observation port with the surface water flow, making it convenient to remove them periodically.

[0018] Furthermore, the bottom ends of the aquaculture pond, vertical flow sedimentation pond, and biochemical pond are all connected to the sewage pipe.

[0019] Based on the above, the sewage pipe is used to discharge sewage that cannot be treated cleanly.

[0020] Furthermore, the aquaculture pond is either a circular aquaculture pond or a square aquaculture pond.

[0021] Furthermore, the biochemical pool is a ring-shaped biochemical pool or a square biochemical pool.

[0022] In summary, the present invention has the following beneficial effects:

[0023] This invention utilizes curtain-type MABR membrane modules placed around the perimeter of the aquaculture pond for aeration and oxygenation, increasing dissolved oxygen while removing ammonia nitrogen. Simultaneously, the curtain-type MABR membrane modules form bioflocs, maintaining water clarity. The three-dimensional oxygen-supplying biochemical MABR membrane device, placed within the aquaculture pond, provides a habitat for microorganisms and a place for shrimp larvae to live. Under the combined action of microorganisms, shrimp feces, feed, and CN (nitrogenous carbon) in the water, the membrane surface of the oxygen-supplying membrane module forms a biofilm through bacterial mucus, i.e., bioflocs that purify the water. These bioflocs can serve as food for the shrimp, improving the biochemical efficiency of the aquaculture pond while reducing the need for supplemental feed. In traditional aquaculture, feed costs typically account for at least half of the total cost, while this invention can reduce feed costs by 10%-20%. Furthermore, the power unit, in conjunction with the detection and control system, can return the treated aquaculture water from the vertical flow sedimentation tank and biological treatment tank back to the aquaculture pond, forming a complete water circulation system and further reducing aquaculture costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the full-volume water circulation biofloc three-dimensional shrimp farming system of this utility model;

[0025] Figure 2 This is a three-dimensional structural diagram of the aquaculture pond of this utility model;

[0026] Figure 3 This diagram shows the positional relationship between the curtain-type MABR membrane module and the three-dimensional oxygen supply biochemical MABR membrane device in the aquaculture pond of this utility model.

[0027] Figure 4 This is a schematic diagram of the structure of the biochemical tank of this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the oxygen supply membrane assembly of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the three-dimensional oxygen supply biochemical MABR membrane device of this utility model;

[0030] Figure 7 This is a schematic diagram of the cross-sectional structure of the oxygen supply membrane module of this utility model;

[0031] Figure 8 This is a schematic diagram of a square aquaculture pond.

[0032] Figure 9 Top view of a square three-dimensional oxygen supply biochemical MABR membrane device;

[0033] Figure 10 This is a schematic diagram of a square biochemical pool.

[0034] Reference numerals: 1-Aquaculture pond; 2-Vertical flow sedimentation tank; 3-Biological tank; 4-Curtain-type MABR membrane module; 5-Three-dimensional oxygen supply biochemical MABR membrane device; 6-Oxygen supply membrane module; 7-Oxygen supply zone; 8-Feed receiving zone; 9-Passage zone; 10-Discharge channel; 11-Sedimentation tank inlet; 12-Sedimentation tank outlet; 13-Sedimentation tank sludge outlet; 14-Deoxygenation tank; 15-Anoxic tank; 16-Aerobic tank; 17-Sedimentation tank; 18-First MABR membrane module; 19-... 20-Second MABR membrane module; 21-Third MABR membrane module; 22-Inlet; 23-Biochemical tank outlet; 24-Circulation pump; 25-Oxygen pump; 26-Ultraviolet disinfection device; 27-Circulation pipe; 28-Gas pipe; 29-Microfilter; 30-Overflow observation port; 31-Air source heat pump; 32-Membrane cavity; 33-Oxygen supply membrane wall; 34-Biofilm; 35-Conical bottom; 36-Sewage pipe; 37-Square three-dimensional oxygen supply biochemical MABR membrane device; 38-Clear water tank. Detailed Implementation

[0035] The utility model objective of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the implementation of this utility model is not limited to the following embodiments.

[0036] Example 1

[0037] like Figures 1 to 7 As shown, the full-volume water circulation biofloc three-dimensional shrimp farming system includes a rearing pond 1, a vertical flow sedimentation tank 2, a biological treatment tank 3, a microfilter 28, and a power unit arranged sequentially. The rearing pond 1 contains curtain-type MABR membrane modules 4 arranged around the perimeter and a three-dimensional oxygen supply biochemical MABR membrane device 5 located in the center. The curtain-type MABR membrane modules 4 treat the water quality while supplying oxygen to the shrimp, and the three-dimensional oxygen supply biochemical MABR membrane device 5 provides a habitat for the shrimp while supplying oxygen. 5 includes several layers of oxygen supply membrane components 6 arranged vertically. Each oxygen supply membrane component 6 is provided with an oxygen supply zone 7, a feed receiving zone 8, and a passage zone 9. The feed receiving zones 8 of each layer of the oxygen supply membrane component 6 are staggered. The middle part of the three-dimensional oxygen supply biochemical MABR membrane device 5 is provided with a discharge channel 10 for settling excrement. The aquaculture pond 1 is provided with a detection and control system. The detection and control system, in conjunction with the power device, transports the aquaculture water treated by the vertical flow sedimentation tank 2 and the biochemical tank 3 back to the aquaculture pond 1.

[0038] This invention utilizes curtain-type MABR membrane modules 4 placed around the perimeter of the aquaculture pond 1 for aeration and oxygen transfer, increasing dissolved oxygen in the water while removing ammonia nitrogen. Simultaneously, bioflocs form on the curtain-type MABR membrane modules 4, maintaining water clarity. A three-dimensional oxygen supply biochemical MABR membrane device 5, placed within the aquaculture pond 1, provides a habitat for microorganisms and shrimp larvae. Under the combined action of microorganisms, shrimp feces, feed, and CN in the water, the membrane surface of the oxygen supply membrane module 6 forms a biofilm 33, i.e., bioflocs purifying the water, through bacterial mucus. These bioflocs serve as food for the shrimp, and their nutritional quality is similar to that of wild shrimp in their natural habitat. Therefore, by maintaining an appropriate density of flocs throughout the aquaculture cycle, the need for feed additives can be reduced. Feed costs typically account for at least half of the costs in traditional aquaculture, while this invention can reduce feed costs by 10%-20%, improving the biochemical efficiency within the aquaculture pond 1. The microfilter 28 is used to filter suspended solids in the biological effluent, making the aquaculture water in the fish pond clearer. Furthermore, the power unit, in conjunction with the detection and control system, can transport the wastewater treated by the vertical flow sedimentation tank 2 and the biological tank 3 back into the aquaculture pond 1, forming a complete water circulation system.

[0039] The detection and control system includes an electrical control system that controls the opening and closing of valves in each pool and pipeline. Each pool is equipped with an individual detection system, including the collection of data such as dissolved oxygen, pH, ammonia nitrogen, and nitrite, and is also equipped with AI intelligent recognition of activity trajectories. The detection and control system will aggregate and feed back all the aquaculture data from the aquaculture pool 1 to a cloud server. Through AI intelligent analysis of the aquaculture status, the system will summarize the aquaculture data, digitizing aquaculture experience. This data is applicable to farmers with different levels of experience, making it easier to promote in the market. The system can continuously innovate and optimize aquaculture efficiency based on the accumulated aquaculture data.

[0040] Preferably, the upper end of the vertical flow sedimentation tank 2 is provided with a sedimentation tank inlet 11 and a sedimentation tank outlet 12, and the lower end of the vertical flow sedimentation tank 2 is provided with a sedimentation tank drain outlet 13. The bottom of the vertical flow sedimentation tank 2 collects excrement discharged from the aquaculture pond 1. The excrement undergoes natural sedimentation and is periodically discharged through the sedimentation tank drain outlet 13. The supernatant obtained after sedimentation in the vertical flow sedimentation tank 2 enters the biological treatment tank 3 through the sedimentation tank outlet 12. The sedimentation tank drain outlet 13 is used to discharge the excrement collected in the vertical flow sedimentation tank 2.

[0041] Preferably, the biological treatment tank 3 is arranged in a ring with a deoxygenation tank 14, an anoxic tank 15, an aerobic tank 16, and a sedimentation tank 17. The deoxygenation tank 14, the anoxic tank 15, and the aerobic tank 16 are respectively equipped with a first MABR membrane module 18, a second MABR membrane module 19, and a third MABR membrane module 20. The deoxygenation tank 14 is provided with an inlet 21. The biological treatment tank 3 is connected to the sedimentation tank outlet 12 through the inlet 21. The bottom of the sedimentation tank 17 is provided with a biological treatment tank drain outlet 22. During the operation of the biological treatment tank 3, the first MABR membrane module 18 supplies a small amount of air. The microorganisms attached to the first MABR membrane module 18 survive by consuming the abundant oxygen in the aquaculture water, thereby reducing the dissolved oxygen content of the aquaculture water to prevent excessive oxygen levels from disrupting the biological environment of the downstream anoxic tank 15 and aerobic tank 16. The second MABR membrane module 19 and the third MABR membrane module 20 in the anoxic tank 15 and aerobic tank 16, by controlling their air output, directly transfer oxygen through the membrane tubes, in parallel with the oxygen transfer through nano-microbubbles, improving oxygen transfer efficiency and the utilization rate of oxygen in the water, thereby greatly reducing energy consumption. The second MABR membrane module 19 and the third MABR membrane module 20 are attached with nitrifying and denitrifying bacteria with different oxygen requirements, which degrade ammonia nitrogen and nitrite in the aquaculture water. Meanwhile, the sedimentation tank 17 can perform secondary sedimentation of excrement and sludge, and the supernatant is obtained after sedimentation.

[0042] Preferably, the power unit includes a circulation pump 23, an oxygenation pump 24, and an ultraviolet disinfection device 25. One end of the ultraviolet disinfection device 25 is connected to the drain outlet 22 of the biological treatment tank, and the other end is connected to the circulation pump 23. The circulation pump 23 is connected to the aquaculture tank 1 through a circulation pipe 26. The oxygenation pump 24 is connected to both the aquaculture tank 1 and the biological treatment tank 3 through an air pipe 27. After being disinfected by the ultraviolet disinfection device 25, the supernatant from the sedimentation tank 17 in the biological treatment tank 3 can be returned to the aquaculture tank 1 through the circulation pump 23, forming a good water circulation. The oxygenation pump 24 is used to supply oxygen to the aquaculture tank 1 and the biological treatment tank 3.

[0043] Preferably, the aquaculture pond 1 is provided with an overflow observation port 29 on its side. The overflow observation port 29 is used to control the maximum water level of the aquaculture pond 1, and the detached shrimp shells will collect near the overflow observation port 29 with the surface water flow, making it convenient to remove them periodically.

[0044] Preferably, the power unit further includes an air source heat pump 30, the inlet 21 of which is connected to the outlet of the circulation pump 23, and the outlet of which is connected to the circulation pipe 26. The air source heat pump 30 can maintain the aquaculture temperature of the water body under different climates and temperatures, enabling uninterrupted aquaculture throughout the year and improving the utilization rate of the aquaculture pond 1.

[0045] Preferably, the oxygen supply membrane assembly 6 includes a membrane cavity 31 and oxygen supply membrane walls 32 on both sides of the membrane cavity 31, and a biofilm 33 is attached to the oxygen supply membrane walls 32. The biofilm 33 on the oxygen supply membrane walls 32 can provide food for shrimp and reduce aquaculture costs.

[0046] Preferably, the bottom of the vertical flow sedimentation tank 2 is a conical bottom 34. The conical bottom 34 of the vertical flow sedimentation tank 2 can efficiently collect the excrement discharged from the aquaculture tank 1.

[0047] Preferably, the bottom ends of the aquaculture pond 1, the vertical flow sedimentation pond 2, and the biochemical pond 3 are all connected to a sewage pipe 35. The sewage pipe 35 is used to discharge sewage that cannot be completely treated.

[0048] The specific implementation of this embodiment is as follows: The three-dimensional oxygen supply biochemical MABR membrane device 5 provides a place for microorganisms to attach and a place for shrimp larvae to inhabit; the surface of the membrane fibers of the three-dimensional oxygen supply biochemical MABR membrane device 5 is connected by bacterial mucus under the combined action of microorganisms, shrimp feces, feed and CN in the water to form bioflocs, which can provide some food for shrimp. At the same time, the oxygen supply membrane component 6 is configured with an oxygen supply zone 7, a feed receiving zone 8 and a passage zone 9 by adjusting the density of membrane fibers in different areas. During feeding, feed is evenly scattered onto the oxygen supply membrane assembly 6. Due to the higher density of the membrane fibers in the feed receiving area 8, the feed will remain on it. However, the density in the oxygen supply area 7 and the passage area 9 is lower, causing the feed to fall through them. Furthermore, because the feed receiving areas 8 of each layer of the oxygen supply membrane assembly 6 are staggered (not in the same vertical direction), each layer's feed receiving area 8 can evenly receive feed, ensuring uniform stocking density in all areas of the pond and guaranteeing farming efficiency. The passage area 9 facilitates shrimp movement in each layer of the three-dimensional oxygen supply biochemical MABR membrane device 5. Simultaneously, the gas generated by the curtain-type MABR membrane floats to the surface in the water, agitating suspended particles such as excrement in the pond. These particles are then carried by the water flow and eventually settle to the bottom in the non-aerated discharge channel 10 at the center of the aquaculture pond 1. The excrement is discharged into the vertical flow sedimentation tank 2 through a pipe at the center of the bottom of the aquaculture pond 1. Meanwhile, detached shrimp shells are carried by the surface water flow and collect near the overflow observation port 29, where they are periodically removed manually. The bottom of the vertical flow sedimentation tank 2 collects the solid excrement discharged from the aquaculture pond 1. The supernatant obtained after sedimentation enters the deoxygenation tank 14 of the biological tank 3. Subsequently, the dissolved oxygen content of the aquaculture water is reduced in the deoxygenation tank 14, and the ammonia nitrogen and nitrite in the aquaculture water are degraded in the anoxic tank 15 and aerobic tank 16. Finally, the aquaculture water undergoes secondary sedimentation in the sedimentation tank 17. The supernatant obtained is then disinfected by the ultraviolet disinfection device 25 and supplied back to the aquaculture pond 1 through the circulation pump 23, forming an ecological cycle. With this water circulation system, the final wastewater discharge is only 3%-5%, avoiding environmental problems caused by large-scale wastewater discharge.

[0049] Example 2

[0050] Except for the following technical features, the other technical features in this embodiment are the same as those in Embodiment 1.

[0051] like Figures 8 to 10As shown, the aquaculture pond 1 is a square aquaculture pond, and a matching square three-dimensional oxygen supply biochemical MABR membrane device 36 is placed inside the square aquaculture pond. In addition, the biochemical pond 3 is a square biochemical pond, and a deoxygenation pond 14, an anoxic pond 15, an aerobic pond 16, a sedimentation pond 17, and a clear water pond 37 are arranged sequentially inside the square biochemical pond 37. The supernatant of the sedimentation pond 17 will enter the clear water pond 37 for storage, and the clear water pond 37 is connected to the circulation pump 23 through the ultraviolet disinfection device 25.

[0052] The above description is only the optimal solution embodiment of this utility model and is not intended to limit this utility model. Various modifications or substitutions made by those skilled in the art to this utility model without departing from the essence and protection scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A whole water circulation biological floc three-dimensional shrimp culture system, characterized in that: The system includes a rearing pond (1), a vertical flow sedimentation tank (2), a biological treatment tank (3), a microfilter (28), and a power unit arranged sequentially. The rearing pond (1) includes a curtain-type MABR membrane module (4) arranged around the perimeter and a three-dimensional oxygen supply biochemical MABR membrane device (5) arranged in the center. The curtain-type MABR membrane module (4) treats the water quality while supplying oxygen to the shrimp, and the three-dimensional oxygen supply biochemical MABR membrane device (5) provides a habitat for the shrimp while supplying oxygen, thus achieving high-density rearing. The three-dimensional oxygen supply biochemical MABR membrane device (5) includes upper and lower three-dimensional structures. The oxygen supply membrane assembly (6) consists of several layers, each with an oxygen supply zone (7), a feed receiving zone (8), and a passage zone (9). The feed receiving zones (8) of each layer of the oxygen supply membrane assembly (6) are staggered. The three-dimensional oxygen supply biochemical MABR membrane device (5) has a discharge channel (10) for settling excrement in the middle. The aquaculture pond (1) is equipped with a detection and control system. The detection and control system, in conjunction with the power device, transports the aquaculture water treated by the vertical flow sedimentation tank (2) and the biochemical tank (3) back to the aquaculture pond (1).

2. The whole water circulation bio-floc three-dimensional shrimp culture system according to claim 1, characterized in that: The biochemical tank (3) is provided with a deoxygenation tank (14), an anoxic tank (15), an aerobic tank (16) and a sedimentation tank (17). The deoxygenation tank (14), the anoxic tank (15) and the aerobic tank (16) are respectively equipped with a first MABR membrane module (18), a second MABR membrane module (19) and a third MABR membrane module (20). The deoxygenation tank (14) is provided with an inlet (21). The biochemical tank (3) is connected to the vertical flow sedimentation tank (2) through the inlet (21). The bottom of the sedimentation tank (17) is provided with a biochemical tank outlet (22).

3. The whole water circulation bio-floc three-dimensional shrimp culture system according to claim 2, characterized in that: The power unit includes a circulation pump (23), an oxygenation pump (24), and an ultraviolet disinfection device (25). One end of the ultraviolet disinfection device (25) is connected to the drain outlet (22) of the biological treatment tank, and the other end is connected to the circulation pump (23). The circulation pump (23) is connected to the aquaculture tank (1) through a circulation pipe (26). The oxygenation pump (24) is connected to the aquaculture tank (1) and the biological treatment tank (3) through an air pipe (27).

4. The whole water circulation bio-floc three-dimensional shrimp culture system according to claim 1, characterized in that: The upper end of the vertical flow sedimentation tank (2) is provided with a sedimentation tank inlet (11) and a sedimentation tank outlet (12), and the lower end of the vertical flow sedimentation tank (2) is provided with a sedimentation tank drain outlet (13). The bottom of the vertical flow sedimentation tank (2) is a cone bottom (34).

5. The whole water circulation bio-floc three-dimensional shrimp culture system according to claim 3, characterized in that: The power unit also includes an air source heat pump (30), the inlet (21) of which is connected to the outlet of the circulation pump (23), and the outlet of which is connected to the circulation pipe (26).

6. The whole water circulation bio-floc three-dimensional shrimp farming system according to claim 1, characterized in that: The oxygen supply membrane assembly (6) includes a membrane cavity (31) and oxygen supply membrane walls (32) on both sides of the membrane cavity (31), and a biofilm (33) is attached to the oxygen supply membrane walls (32).

7. The three-dimensional shrimp farming system based on bioflocs with full water circulation as described in claim 1, characterized in that: An overflow observation port (29) is provided on the side of the aquaculture pond (1).

8. The whole water circulation bio-floc three-dimensional shrimp farming system according to claim 1, characterized in that: The bottom ends of the aquaculture pond (1), the vertical flow sedimentation pond (2), and the biochemical pond (3) are all connected to the sewage pipe (35).

9. The whole water circulation bio-floc three-dimensional shrimp farming system according to claim 1, characterized in that: The aquaculture pond (1) is a ring-shaped aquaculture pond or a square aquaculture pond.

10. The three-dimensional shrimp farming system based on bioflocs with full water circulation according to claim 2, characterized in that: The biochemical pool (3) is a ring-shaped biochemical pool or a square biochemical pool.

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