A high density aquaculture system

Abstract

The utility model relates to aquatic culture technical field especially discloses a kind of high-density aquaculture systems, including breeding pond;Still including the filter system, decomposition system, oxygen supply system and new water replenishment system connected with breeding pond, filter system includes filter box, filter assembly and first circulation component being set in filter box, first circulation component is used to drive water in breeding pond to flow through filter assembly and return to breeding pond, decomposition system includes the decomposition box being communicated with breeding pond, the bacteria colony carrier for decomposing organic matter in water being set in decomposition box and the second circulation component of driving water in breeding pond to flow through bacteria colony carrier and return to breeding pond. Water body is purified by filter and biological decomposition system cooperation, sufficient dissolved oxygen is ensured using high-efficiency oxygen supply mechanism, and automatic water balance and update are supplemented. Realize the efficient removal of water pollutant and the stable supply of dissolved oxygen, and then the breeding density of aquatic product can be improved.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, and in particular discloses a high-density aquaculture system. Background Technology

[0002] Aquaculture is an important agricultural production activity, and with population growth and rising consumer demand, high-density aquaculture has become increasingly popular. However, high-density aquaculture also brings serious technical challenges. Within a limited water space, high-density aquaculture produces large amounts of organic pollutants such as feces and uneaten feed. These pollutants decompose to generate toxic substances such as ammonia nitrogen and nitrite, leading to water quality deterioration. Simultaneously, the respiration of high-density aquatic organisms rapidly depletes dissolved oxygen in the water, creating an oxygen-deficient environment.

[0003] While existing aquaculture systems include units such as filtration and aeration, they often suffer from insufficient treatment efficiency, low system integration, and difficulty in maintaining long-term stable water quality when dealing with the accumulation of pollutants and oxygen consumption caused by high-density aquaculture. Especially under high-load conditions, simple physical filtration is insufficient to completely remove dissolved pollutants and fine suspended solids. Traditional aeration methods may not meet the extremely high dissolved oxygen requirements of high-density aquaculture, and the lack of effective biological decomposition and water circulation mechanisms makes the aquaculture water prone to excessive ammonia nitrogen and nitrite levels, as well as insufficient dissolved oxygen. This seriously affects the growth, health, and even survival rate of farmed organisms, limiting the further development of high-density aquaculture. Utility Model Content

[0004] In order to overcome the technical problem that the development of high-density aquaculture is limited in the existing aquaculture systems, the purpose of this utility model is to provide an integrated, efficient, and cyclical aquaculture system suitable for high-density aquaculture.

[0005] To achieve the above objectives, this utility model provides a high-density aquaculture system, including an aquaculture pond; it also includes a filtration system, a decomposition system, an oxygen supply system, and a fresh water replenishment system connected to the aquaculture pond. The filtration system includes a filter box, a filter assembly disposed within the filter box, and a first circulation assembly used in conjunction with the filter assembly. The first circulation assembly drives the water in the aquaculture pond to flow through the filter assembly in the filter box for filtration and then returns it to the aquaculture pond. The decomposition system includes a decomposition box connected to the aquaculture pond, a microbial carrier disposed within the decomposition box for decomposing feces and uneaten feed in the water, and a second circulation assembly for driving the water in the aquaculture pond to flow through the microbial carrier for treatment and then returning it to the aquaculture pond. The microbial carrier is used to carry active microorganisms from the outside.

[0006] Furthermore, the first circulation component includes a first inlet pipe and a first return pipe connected between the filter box and the aquaculture pond, and a water flow unit connected in cooperation with the first inlet pipe or the first return pipe. The filter box is connected to the aquaculture pond via the first inlet pipe and the first return pipe. The filter component is installed inside the filter box. The water flow unit is used to drive the water to circulate between the filter cartridge system and the aquaculture pond.

[0007] Furthermore, the water flow unit includes a conical cylinder connected to the first return pipe and a first aeration component disposed inside the conical cylinder. The inner diameter of the conical cylinder gradually decreases from the bottom to the top. The first aeration component includes a first aeration disc and a first air source connected to the first aeration disc. The first aeration disc is disposed at the bottom of the conical cylinder. An air inlet pipe is provided on the first return pipe. The air inlet pipe extends to a height higher than the water surface of the filter box, and its extension direction intersects with the extension direction of the first return pipe. When the water flow driven by the first aeration disc passes through the top of the conical cylinder, it generates negative pressure, thereby drawing in air through the air inlet pipe and mixing it with the water flow before returning it to the aquaculture pond through the first return pipe.

[0008] Furthermore, the first and second circulation components have the same structure. The decomposition system is provided in multiple sets, and the types of active bacteria used in the multiple sets of decomposition systems are different. The first circulation component is connected to the filtration system, and the number of second circulation components is the same as the number of decomposition systems. Each second circulation component is connected to a corresponding set of decomposition systems.

[0009] Furthermore, the decomposition chamber is filled with packing material for microbial attachment and growth; the microbial carrier includes nitrifying bacteria, denitrifying bacteria, and a complex probiotic group disposed on the packing material; the nitrifying bacteria, denitrifying bacteria, and the complex probiotic group are used to synergistically degrade organic pollutants in the water and inhibit ammonia nitrogen accumulation.

[0010] Furthermore, the oxygen supply system includes a second aeration component, which includes a second gas source for conveying gas and a plurality of second aeration discs connected to the second gas source. The plurality of second aeration discs are evenly distributed at the bottom of the aquaculture pond, the filter box and the decomposition box, and are arranged in a circumferential manner to form a uniform bubble flow.

[0011] Furthermore, the aquaculture pond is equipped with multiple secondary aeration discs, the filter box is equipped with multiple secondary aeration discs, and the decomposition box is equipped with multiple secondary aeration discs.

[0012] Furthermore, the oxygen supply system includes a water-oxygen mixing unit, which includes an oxygen supply circulating water pump, a first filter screen connected to the oxygen supply circulating water pump, an oxygen tank, and a gas-liquid mixing pipe. The gas-liquid mixing pipe is a Venturi tube, and the oxygen supply pipeline of the oxygen tank is connected to the gas-liquid mixing pipe. The oxygen supply circulating water pump is used to draw water from the aquaculture pond through the first filter screen to the gas-liquid mixing pipe to mix with oxygen and then return it to the aquaculture pond.

[0013] Furthermore, the output end of the gas-liquid mixing pipe is inclined and placed into the water of the aquaculture pond, the cross-section of the aquaculture pond is circular, and the axis of the output end of the gas-liquid mixing pipe intersects with the axis of the aquaculture pond to form a swirling oxygenation effect.

[0014] Furthermore, the new water replenishment system includes a purified water delivery device, a purified water supply pipe, a drain pipe, and a water level sensor. The purified water delivery device is used to deliver external purified water to the aquaculture pond and / or filter box via the purified water supply pipe. The drain pipe is equipped with an electrically controlled valve, which adjusts the drainage volume based on the signal from the water level sensor to maintain the system's water balance.

[0015] Furthermore, the aquaculture ponds and filtration systems are connected to the drainage pipe via pipelines to discharge residual wastewater from the filter boxes of the aquaculture ponds and filtration systems.

[0016] Furthermore, a second filter screen is provided at one end of the first water inlet pipe, and the other end of the first water inlet pipe is connected to the filter box; the second filter screen extends along the depth direction of the water in the aquaculture pond, and the second filter screen is provided with multiple filter holes around its circumference for filtering aquatic products and particulate matter in the water. The diameter of the filter holes gradually decreases from the water surface to the bottom of the box, and one end of the second filter screen protrudes out of the water surface in the aquaculture pond.

[0017] The beneficial effects of this invention: This invention provides a high-density aquaculture system designed to solve the problems of water quality deterioration and insufficient dissolved oxygen in high-density aquaculture. Its principle lies in constructing an integrated, highly efficient, and cyclical ecosystem: water is purified through the synergistic effect of filtration and biological decomposition systems; sufficient dissolved oxygen is ensured using efficient oxygen supply mechanisms (including aeration and Venturi water-oxygen mixing); and automatic water balancing and renewal are provided. The various subsystems work closely together to achieve efficient removal of water pollutants and a stable supply of dissolved oxygen, achieving the following technical effects:

[0018] 1) Highly efficient water purification: The integrated filtration system and biological decomposition system work together to effectively remove suspended solids and dissolved pollutants, significantly improving the quality of aquaculture water.

[0019] 2) Maintain high dissolved oxygen: By combining aeration components and efficient water-oxygen mixing technology, it is ensured that the water body can still maintain sufficient dissolved oxygen under high-density aquaculture load.

[0020] 3) Support high-density and high-efficiency aquaculture: By optimizing water quality and dissolved oxygen environment, stable conditions are provided for high-density aquaculture, thereby increasing aquaculture yield and efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the planar structure of the high-density aquaculture system of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the filtration system and the first circulation component of this utility model;

[0023] Figure 3 This is a partial planar structural diagram of the filtration system of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the filter assembly of this utility model used in conjunction with the first circulation assembly and the first aeration assembly.

[0025] Figure 5 This is a schematic diagram of the water-oxygen mixing unit of the oxygen supply system of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the second aeration component of the oxygen supply system of this utility model.

[0027] The reference numerals in the figures include:

[0028] 1. Aquaculture pond; 2. Filtration system; 3. Decomposition system; 4. Oxygen supply system; 5. Fresh water replenishment system; 11. Filter box; 12. Filter assembly; 13. First circulation assembly; 131. First water inlet pipe; 132. First return pipe; 1321. Air inlet pipe; 133. Water flow unit; 134. Second filter screen; 14. Conical cylinder; 15. First aeration assembly; 150. First air inlet pipe; 151. First aeration disc; 31. Decomposition box; 41. Second aeration assembly; 42. Second air source; 421. Circular pipe; 422. Vertical pipe; 43. Second aeration disc; 45. Water-oxygen mixing unit; 46. Oxygen supply circulating water pump; 47. First filter screen; 48. Oxygen tank; 49. Gas-liquid mixing pipe; 51. Clean water supply pipe; 52. Drainage pipe. Detailed Implementation

[0029] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0030] Please see Figures 1 to 6As shown, this embodiment discloses a high-density aquaculture system, which includes an aquaculture pond 1, a filtration system 2, a decomposition system 3, an oxygen supply system 4, and a fresh water replenishment system 5. The various parts are connected by pipes and circulation components to form a closed loop, thereby purifying, oxygenating, and automatically replenishing the water, and meeting the requirements of high-density aquaculture for water quality stability and resource recycling.

[0031] The aquaculture pond 1 has a circular cross-section and an inverted conical settling area at the bottom for the concentrated deposition of uneaten feed and excrement during the aquaculture process. This settling area is connected to the filter box 11 via a first inlet pipe 131. An integrated second filter screen 134 is installed at the inlet of the first inlet pipe 131. This screen has a hollow cylindrical structure and is located at the center of the aquaculture pond 1, extending along the water depth direction. Multiple filter holes are opened circumferentially on its outer wall, with the hole diameter gradually decreasing from the water surface downwards. The top protrudes above the water surface to prevent particles from floating back up. This design achieves efficient primary filtration of particles in different water layers and effectively prevents aquaculture organisms from accidentally entering the water intake system.

[0032] The filter box 11 in the filtration system 2 is equipped with a set of filter components 12. The filter cartridge has a detachable structure, and the filter media is wrapped in a hollow cylinder with a frame for easy replacement and cleaning. The first circulation component 13 is used to guide the water in the aquaculture pond 1 to the filter box 11 for filtration and then return it to the aquaculture pond 1. Its structure includes a first inlet pipe 131, a first return pipe 132, and a water flow unit 133.

[0033] The water flow unit 133 consists of a conical cylinder 14 and a first aeration assembly 15 located at its bottom. The conical cylinder 14 is wider at the bottom and narrower at the top, with its top connected to the upper part of the aquaculture pond 1 via a first return pipe 132. The first aeration assembly 15 includes an aeration disc connected to a first air source for air supply. During operation, the air source continuously supplies gas to the bottom of the conical cylinder 14 through the aeration disc, pushing the water body to form an upward flow along the conical cylinder 14. As the water flow velocity rises to the top of the conical cylinder 14, a negative pressure is formed, drawing in air through the air inlet pipe 1321 located in the first return pipe 132. After mixing with the water flow, the air is jetted back to the upper part of the aquaculture pond 1 through the return pipe. The jet direction intersects with the circumferential direction inside the aquaculture pond 1, forming a stable swirling motion, which not only realizes air lifting circulation but also further promotes the overall water flow, optimizing the aquatic environment within the aquaculture pond 1.

[0034] Specifically, in actual use, a flexible scraper device that can move up and down is installed on the inner wall of the conical cylinder 14. After being activated at regular intervals, the attached biofilm is scraped off to prevent a decrease in airlift efficiency.

[0035] The decomposition system 3 includes three decomposition tanks 31. Each decomposition tank 31 is connected to the aquaculture pond 1 via a second inlet pipe and a second return pipe, employing a circulation structure similar to that of the filtration system 2. The decomposition tank 31 is filled with a special packing material for microbial attachment. This packing material is a mixture of porous ceramic particles and biofilm media, forming a three-dimensional biological purification zone. The connection between the decomposition tank 31 and the water pipes uses a quick-connect, quick-release interface design, facilitating rapid replacement or maintenance of specific decomposition modules and improving the system's continuous operation capability.

[0036] The microbial carriers, including nitrifying bacteria, denitrifying bacteria, and a complex of probiotics, are fixedly attached to the surface of the packing material. Through the synergistic effect of the microbial community, they effectively decompose feces, ammonia nitrogen, and organic pollutants entering the decomposition tank 31. The second circulation component propels water from the aquaculture pond 1 into the decomposition tank 31, where it is treated by microorganisms and then returned to the aquaculture pond 1, maintaining stable water quality. Compared with existing technologies, this structure changes the traditional series treatment to a parallel mode, with each decomposition system 3 operating independently, reducing the risk of system blockage, and enabling refined control and modular maintenance.

[0037] The oxygen supply system consists of four parts, including a second aeration assembly 41 located at the bottom of each tank. This assembly comprises multiple second aeration discs 43 and a second air source 42 (blower). The second air source 42 is indirectly connected to the aeration discs via an annular pipe 421 and a vertical pipe 422. The annular pipe 421 can be connected to the edges of the aquaculture tank 1, the decomposition tank 31, and the filter tank 11 via a quick-release structure. These components are arranged symmetrically around the bottom of the aquaculture tank 1, the filter tank 11, and the decomposition tank 31 to generate a continuous, uniform, and dense flow of fine bubbles, thereby increasing the basic dissolved oxygen level. In this embodiment, there are five second aeration assemblies 41, which are used in conjunction with three decomposition systems 3, one aquaculture tank 1, and one filter system 2.

[0038] The oxygen supply system 4 also includes a water-oxygen mixing unit 45, which consists of an oxygen supply circulating water pump 46, a first filter screen 47, an oxygen tank 48, and a Venturi-structured gas-liquid mixing pipe 49 connecting them. The oxygen supply circulating water pump 46 draws water from the aquaculture pond 1, which is then coarsely filtered by the first filter screen 47 before entering the Venturi pipe and mixing with gas from the oxygen tank 48. The mixed water is then reinjected into the aquaculture pond 1 from the output end of the gas-liquid mixing pipe 49, which is inclined within the water body and intersects the axis of the aquaculture pond 1, creating a swirling oxygenation zone through tangential outflow. This structure not only improves the oxygen dissolution efficiency in the water but also further enhances the agitation and circulation of the water within the aquaculture pond 1.

[0039] In actual production, a hemispherical cover with an inclined guide groove can be installed at the outlet of the gas-liquid mixing pipe 49 to guide the mixed gas flow to diffuse along the spiral path, increase the residence time of the gas in the water, and further enhance the oxygen dissolution efficiency.

[0040] The new water replenishment system 5 includes a purified water delivery device located outside the system. It connects to the aquaculture pond 1 and the filter box 11 via a purified water supply pipe 51, enabling automatic water replenishment based on water level changes. An electrically controlled valve is installed on the drain pipe 52 at the bottom of the aquaculture pond 1, electrically connected to a water level sensor installed inside the pond. When the water level is higher than a set value, the electrically controlled valve automatically opens to drain water; conversely, it triggers purified water supply when the water level is lower, automatically adjusting the water balance. This system maintains a stable aquaculture environment through electronic control, improving management efficiency.

[0041] Specifically, this invention is applicable to a high-density tilapia farming system: A circular farming pond 1 with a diameter of 12 meters and a depth of 1.5 meters is equipped with a bottom inverted cone-shaped sedimentation zone, with a drain pipe 52 located at the bottom of the cone. The bottom of the farming pond 1 is connected to a filter box 11 via a first inlet pipe 131, and the filter box 11 contains a replaceable filter cartridge. The filtration system 2 circulates water and automatically introduces air through a cone-shaped airlift device, driving the water flow to form a continuous swirling state in the farming pond 1. Three sets of decomposition boxes 31 and one set of filter boxes 11 are evenly distributed on the outside of the farming pond 1, communicating with the middle layer of the farming pond 1, for continuous water purification. The oxygen supply system 4 primarily uses aeration discs to maintain normal dissolved oxygen levels, while a venturi oxygenation system enhances oxygen supply during peak periods. During operation, a low water exchange rate is maintained, and water transparency and dissolved oxygen levels remain stable, making it suitable for high-density farming scenarios.

[0042] It achieves efficient water circulation and filtration without the use of water pumps, and the entire system is modularly designed, making it easy to disassemble and maintain, energy-saving and environmentally friendly, and easy to manage.

[0043] Specifically, this invention also designs a compact system for small ornamental fish. The breeding pond 1 has a diameter of 2 meters and a depth of 0.5 meters, and is equipped with a set of filter boxes 11 and a set of decomposition boxes 31. Flexible biofilm material is laid inside the decomposition boxes 31. A micro airlift cone is used to circulate the water, and a low-power air pump provides sufficient gas for aeration and negative pressure air intake. The same swirling water outlet method as the main system is adopted to maintain a uniform water flow. Oxygen supply uses a combination of small nano-aeration discs and Venturi tubes, producing fine bubbles that meet the physiological needs of small fish. The system is set to perform daily timed small-flow water changes to maintain ecological stability. This system has a compact structure and a high degree of automation, making it suitable for use in office, exhibition, or home environments to achieve ecological recirculating aquaculture in small spaces.

[0044] This invention achieves low-energy, high-efficiency, and automated operation under high-density aquaculture conditions by incorporating an airlift-type water circulation structure, a multi-stage decomposition tank 31 for coordinated treatment, an orderly layout of the aeration system, and an automatic water replenishment control system. Compared to traditional methods that rely on extensive water changes and external water pumps, this system significantly reduces energy consumption and maintenance frequency, while increasing stocking density and output efficiency, demonstrating significant potential for widespread application.

[0045] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-density aquaculture system, comprising a culture pond (1); characterized in that: It also includes a filtration system (2), a decomposition system (3), an oxygen supply system (4), and a fresh water replenishment system (5) connected to the aquaculture pond (1). The filtration system (2) includes a filter box (11), a filter assembly (12) set in the filter box (11), and a first circulation assembly (13) used in conjunction with the filter assembly (12). The first circulation assembly (13) is used to drive the water in the aquaculture pond (1) to flow through the filter assembly (12) in the filter box (11) for filtration and then return it to the aquaculture pond (1). The decomposition system (3) includes a decomposition box (31) connected to the aquaculture pond (1), a microbial carrier set in the decomposition box (31) for decomposing feces and uneaten feed in the water, and a second circulation assembly for driving the water in the aquaculture pond (1) to flow through the microbial carrier for treatment and then return it to the aquaculture pond (1). The microbial carrier is used to carry active microorganisms from the outside.

2. The high-density aquaculture system according to claim 1, characterized in that: The first circulation component (13) includes a first inlet pipe (131) and a first return pipe (132) connected between the filter box (11) and the aquaculture pond (1), and a water flow unit (133) connected in cooperation with the first inlet pipe (131) or the first return pipe (132). The filter box (11) is connected to the aquaculture pond (1) via the first inlet pipe (131) and the first return pipe (132). The filter component (12) is disposed inside the filter box (11). The water flow unit (133) is used to drive the water to circulate between the filter cartridge system and the aquaculture pond (1).

3. The high-density aquaculture system according to claim 2, characterized in that: The water flow unit (133) includes a conical cylinder (14) connected to the first return pipe (132) and a first aeration component (15) disposed inside the conical cylinder (14). The inner diameter of the conical cylinder (14) gradually decreases from the bottom to the top. The first aeration component (15) includes a first aeration disc (151) and a first air source connected to the first aeration disc (151). The first aeration disc (151) is disposed at the bottom of the conical cylinder (14). An air inlet pipe (1321) is provided on the first return pipe (132). The air inlet pipe (1321) extends to a height higher than the water surface of the filter box (11), and its extension direction intersects with the extension direction of the first return pipe (132). When the water flow driven by the first aeration disc (151) passes through the top of the conical cylinder (14), a negative pressure is generated, thereby drawing in air through the air inlet pipe (1321) and mixing it with the water flow before returning it to the aquaculture pond (1) through the first return pipe (132).

4. The high-density aquaculture system according to claim 1, characterized in that: The first circulation component (13) and the second circulation component have the same structure. The decomposition system (3) is provided in multiple sets. The types of active bacteria that the multiple sets of decomposition systems (3) are used with are different. The first circulation component (13) is connected to the filtration system (2). The number of the second circulation components is the same as the number of the decomposition systems (3), and each second circulation component is connected to a set of decomposition systems (3).

5. The high-density aquaculture system according to claim 1, characterized in that: The decomposition chamber (31) is filled with packing material for microbial attachment and growth; the microbial carrier includes nitrifying bacteria, denitrifying bacteria and a complex probiotic group set on the packing material; the nitrifying bacteria, denitrifying bacteria and the complex probiotic group are used to synergistically degrade organic pollutants in the water and inhibit the accumulation of ammonia nitrogen.

6. The high-density aquaculture system according to claim 1, characterized in that: The oxygen supply system (4) includes a second aeration component (41), which includes a second gas source (42) for conveying gas and a plurality of second aeration discs (43) connected to the second gas source (42). The plurality of second aeration discs (43) are evenly distributed at the bottom of the aquaculture pond (1), the filter box (11) and the decomposition box (31) and are arranged in a circumferential manner to form a uniform bubble flow. The aquaculture pond (1) is equipped with a plurality of second aeration discs (43), the filter box (11) is equipped with a plurality of second aeration discs (43), and the decomposition box (31) is equipped with a plurality of second aeration discs (43).

7. The high-density aquaculture system according to claim 1, characterized in that: The oxygen supply system (4) includes a water-oxygen mixing unit (45), which includes an oxygen supply circulating water pump (46), a first filter screen (47) connected to the oxygen supply circulating water pump (46), an oxygen tank (48), and a gas-liquid mixing pipe (49). The gas-liquid mixing pipe (49) is a Venturi tube. The oxygen supply pipeline of the oxygen tank (48) is connected to the gas-liquid mixing pipe (49). The oxygen supply circulating water pump (46) is used to draw water from the aquaculture pond (1) through the first filter screen (47) to the gas-liquid mixing pipe (49) to mix with oxygen and then return it to the aquaculture pond (1).

8. The high-density aquaculture system according to claim 7, characterized in that: The output end of the gas-liquid mixing pipe (49) is inclined and placed into the water of the aquaculture pond (1). The cross-section of the aquaculture pond (1) is circular. The axis of the output end of the gas-liquid mixing pipe (49) intersects with the axis of the aquaculture pond (1) to form a swirling oxygenation effect.

9. The high-density aquaculture system according to claim 1, characterized in that: The new water replenishment system (5) includes a water purification delivery device, a water purification supply pipe (51), a drain pipe (52), and a water level sensor. The water purification delivery device is used to transport external purified water to the breeding pond (1) and / or filter box (11) via the water purification supply pipe (51). The breeding pond (1) and the filter system (2) are both connected to the drain pipe (52). The drain pipe (52) is equipped with an electric control valve. The electric control valve adjusts the drainage volume based on the signal from the water level sensor to maintain the system water balance.

10. The high-density aquaculture system according to claim 2, characterized in that: One end of the first water inlet pipe (131) is provided with a second filter screen (134), and the other end of the first water inlet pipe (131) is connected to the filter box (11); the second filter screen (134) extends along the depth direction of the water in the aquaculture pond (1), and the second filter screen (134) is provided with a plurality of filter holes for filtering aquatic products and particulate matter in the water in the circumferential direction. The aperture of the filter holes gradually decreases from the water surface to the bottom of the box, and one end of the second filter screen (134) protrudes out of the water surface in the aquaculture pond (1).

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