Intensive runway type biofloc aquaculture system

Abstract

The utility model discloses an intensive runway type biological floc aquaculture system which comprises a runway type culture pond, an aeration and water circulation device, and an automatic feeding device, a water quality monitoring device, a residual body collecting device and a floc removing device which are sequentially arranged in the runway type culture pond, the runway type culture pond comprises a pond bottom wall and pond side walls, the pond side walls comprise a first long pond wall and a second long pond wall which are oppositely arranged as well as a first short pond wall and a second short pond wall which are oppositely arranged, and the first short pond wall and the second short pond wall are arc-shaped or semi-hexagonal; the residue collecting device and the floccule removing device are in a right-angle inscribed arc shape or a right-angle triangle shape matched with the appearance of the second short pool wall. Through reasonable design of functional modules, reasonable layout of automatic feeding, water quality monitoring, residual body collection and floc removal is completed, a residual body collection device and a floc removal device are arranged at the edge position of a runway type culture pond, no extra land is occupied, and the effective culture area proportion in industrial culture can be increased.

Description

Technical Field

[0001] This utility model relates to the field of aquaculture technology, specifically to an intensive raceway-type biofloc aquaculture system. Background Technology

[0002] Biofloc technology is one of the emerging aquaculture models. With its gradual promotion in factory farming, biofloc technology has gained attention in the aquaculture industry for its advantages of using active microorganisms to treat aquaculture pollutants in situ and achieving extremely low water exchange.

[0003] Raceway-style aquaculture ponds, with their ability to easily create stable and continuous water flow, are highly suitable for biofloc culture. They are typically rectangular with rounded corners, as the remaining edges and corners are difficult to utilize. In production applications, a series of supporting facilities and equipment, such as floc removal devices, shrimp shell residue collection devices, and automatic feeding devices, are still required to maintain stable, adequate, and effective biofloc formation, thereby ensuring the stable operation of the aquaculture system.

[0004] However, current technological systems mainly focus on the research of ponds or functional equipment, and do not incorporate the intensive design of bioflocculation devices required for racetrack-style bioflocculation aquaculture. In existing technologies, bioflocculation devices are generally located outside the aquaculture system, requiring additional floor space and hindering the improvement of the effective aquaculture area ratio of the plant.

[0005] Not only does it occupy additional floor space and reduce the effective aquaculture area of ​​the factory, but the biofloc device is also connected to the aquaculture pond through complex pipelines. Due to the influence of the complex pipelines, more stagnant water will be generated, causing pollution and reducing the aquaculture effect. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the defects of low integration and low site utilization in the existing biofloc aquaculture system, thereby providing an intensive raceway-type biofloc aquaculture system.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] The aquaculture system is rectangular in shape and includes a racetrack-type aquaculture pond, an aeration and water circulation device, an automatic feeding device, a water quality monitoring device, a residue collection device, and a floc removal device.

[0009] The racetrack-style aquaculture pond includes side walls and a bottom wall; the side walls include a first long wall and a second long wall arranged opposite each other, and a first short wall and a second short wall arranged opposite each other, the first short wall and the second short wall being arc-shaped or semi-hexagonal; the bottom wall is an inclined slope, the first short wall being located at the top of the slope of the bottom wall, and the second short wall being located at the bottom of the slope of the bottom wall; a barrier wall parallel to the first long wall is provided in the middle of the racetrack-style aquaculture pond.

[0010] The aeration and water circulation device includes multiple jets installed on the side wall of the pool and the barrier wall. The jets are used to drive the water in the racetrack-type aquaculture pool to circulate along the outer periphery of the barrier wall.

[0011] The automatic feeding device is located in the chamfered area outside the side of the first short pool wall near the first long pool wall, and is used to feed the racetrack-type aquaculture pond.

[0012] The water quality monitoring device is located in the chamfered area outside the side of the first short pool wall near the second long pool wall, and is used to monitor the water quality parameters of the racetrack-type aquaculture pond.

[0013] The waste collection device is located in the chamfered area outside the second short pool wall near the second long pool wall, and is used to collect the aquaculture waste in the racetrack-type aquaculture pond;

[0014] The floc removal device is located in the chamfered area outside the second short pool wall near the first long pool wall, and is used to collect particulate matter in the racetrack-type aquaculture pond.

[0015] Furthermore, the residue collection device is in the shape of a right-angled inscribed arc or a right-angled triangle with the same shape as the outer chamfered area of ​​the second short pool wall near the second long pool wall, and the floc removal device is in the shape of a right-angled inscribed arc or a right-angled triangle with the same shape as the outer chamfered area of ​​the second short pool wall near the first long pool wall.

[0016] Furthermore, the lengths of the first long pool wall and the second long pool wall are 10-30 meters, the lengths of the first short pool wall and the second short pool wall are 4-8 meters, and the slope of the pool bottom wall is 0.5°-0.6°.

[0017] Furthermore, an aeration pipe is provided on the side of the first long pool wall near the first short pool wall.

[0018] Furthermore, the area of ​​the residue collection device is 0.2%-0.5% of the total area of ​​the intensive raceway-type biofloc aquaculture system; the area of ​​the floc removal device is 0.2%-0.5% of the total area of ​​the intensive raceway-type biofloc aquaculture system.

[0019] Furthermore, the interval between two adjacent injectors on the sidewall of the pool is 4-5 meters; the injectors on the barrier wall and the injectors on the first long pool wall or the second long pool wall are positioned correspondingly, and the interval between the injectors on the barrier wall and the injectors on the first long pool wall or the second long pool wall is 2-3 meters.

[0020] Furthermore, the waste collection device includes a collection pipe with openings at both ends, a first inlet located below the second short pool wall for water from the racetrack-type aquaculture pond to enter through the bottom opening of the collection pipe, a plurality of first nano-airlift rings located inside the collection pipe, a filter screen located at the top of the collection pipe for collecting aquaculture waste, an overflow tray for receiving water overflowing from the filter screen, and a first outlet located above the second short pool wall for water from the overflow tray to flow back to the racetrack-type aquaculture pond.

[0021] Furthermore, the vertical distance between the center of the collection tube and the two right-angled surfaces of the residue collection device is 5-25 cm, and the diameter of the collection tube is not less than 160 mm.

[0022] Furthermore, the floc removal device includes a settling inner tube with an opening at the upper end, a settling outer tube sleeved around the outer periphery of the settling inner tube and with its upper end face higher than the upper end face of the settling inner tube, a second inlet located below the second short pool wall for water from the racetrack-type aquaculture pond to flow into the settling inner tube, a second nano-airlift ring located inside the settling inner tube, and a second outlet located above the second short pool wall for water from the floc removal device to flow back to the racetrack-type aquaculture pond.

[0023] Furthermore, the height of the second inlet of the floc removal device is 25-30 cm higher than the bottom wall of the pool; the water level inside the floc removal device is 5-10 cm higher than the water level inside the raceway-type aquaculture pool.

[0024] The technical solution of this utility model has the following advantages:

[0025] 1. The intensive raceway-type biofloc aquaculture system provided by this utility model has a raceway-type aquaculture pond with rounded corners and an octagonal shape. The aquaculture system is rectangular in shape. The automatic feeding device, water quality monitoring device, residue collection device, and floc removal device are arranged sequentially at the outer edges of the four corners of the raceway-type aquaculture pond according to the water flow direction in the raceway-type aquaculture pond. That is, they are arranged in the four corner areas of the rectangular aquaculture system that are not occupied by the raceway-type aquaculture pond. This effectively utilizes the edge area of ​​the aquaculture system. The residue collection device and the floc removal device do not occupy additional space, which can increase the effective aquaculture area ratio in factory aquaculture. Furthermore, the bottom wall of the pool has a certain slope. By installing jets on the side walls and middle baffle walls of the racetrack-style aquaculture pool, the jets are connected to water pumps to form a circular circulating water flow. Following the direction of the water flow, an automatic feeding device and a water quality detection module are arranged in sequence in the chamfered area on the higher horizontal side, while a residue collection device and a floc removal device are arranged in sequence in the two chamfered areas on the lower horizontal side. The water flow can be used to periodically and effectively remove residues and flocs in the racetrack-style aquaculture pool, control the concentration of residues and flocs in the water, improve the aquaculture environment of the aquaculture system, and enhance the aquaculture effect.

[0026] 2. The intensive raceway-type biofloc aquaculture system provided by this utility model has a residue collection device and a floc removal device that are both inscribed in right-angled arcs or right-angled triangles with the same shape as the chamfered area. This can realize the intensive design of the aquaculture system and reduce the footprint of the residue collection device and the floc removal device.

[0027] 3. The intensive raceway-type biofloc aquaculture system provided by this utility model has a bottom wall slope of 0.5°-0.6°, which increases the drop at both ends of the raceway-type aquaculture pond, which is conducive to improving the water circulation effect and facilitating the effective separation and collection of residual organisms.

[0028] 4. The intensive raceway-type biofloc aquaculture system provided by this utility model has a residue collection device and a floc removal device that both use air lifting to deliver feed or water, which is highly compatible with the overall aquaculture system and is highly efficient and energy-saving.

[0029] 5. The intensive raceway-type biofloc aquaculture system provided by this utility model, through the rational design of the ratio of the area of ​​the residue collection device and the floc removal device to the area of ​​the entire aquaculture system, can ensure that the residue collection device and the floc removal device can effectively remove residues and flocs in the raceway-type aquaculture pond, and control the floc concentration at a level that does not affect the aquaculture environment, thereby achieving the intensive design of the entire aquaculture system and increasing the effective aquaculture area ratio in factory farming.

[0030] 6. The intensive raceway-type biofloc aquaculture system provided by this utility model, through the reasonable design of the layout and spacing of each jet in the aeration and water circulation device, can control the water flow velocity in the raceway-type aquaculture pond between 0.05 and 0.20 m / s, and the dissolved oxygen content of the aquaculture water is not less than 5.0 mg / L, providing an aquaculture environment suitable for the normal growth of the cultured organisms.

[0031] 7. The intensive raceway-type biofloc aquaculture system provided by this utility model has a simple structure for the residue collection device and the floc removal device. It does not require the design of complex connecting pipes, which can reduce the volume of dead water caused by connecting pipes, avoid the pollution of the aquaculture water caused by the rapid reproduction of microorganisms in the dead water in the module, and improve the aquaculture effect.

[0032] 8. The intensive raceway-type biofloc aquaculture system provided by this utility model has a second inlet height of 25-30 cm higher than the bottom wall of the pool, and the water level inside the floc removal device is 5-10 cm higher than the water level inside the raceway-type aquaculture pool. The water inlet speed can be adjusted by adjusting the aeration size of the second nano airlift ring, and the water retention time in the module can be controlled at 1-1.5 hours to achieve a good settling effect. During the aquaculture process, the sludge settling volume (SV30) of the biofloc in the water can be controlled at 0.5-30.0 ml / L. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of an intensive raceway-type biofloc aquaculture system in the first embodiment of this utility model.

[0035] Figure 2 This is a schematic diagram of an intensive raceway-type biofloc aquaculture system in the second embodiment of this utility model.

[0036] Figure 3 This is a schematic diagram of the bottom wall of the racetrack-type aquaculture pond in an embodiment of this utility model;

[0037] Figure 4 This is a right-angled view of the residue collection device in an embodiment of this utility model;

[0038] Figure 5This is a view of the arc or bevel of the debris collection device in the embodiment of this utility model;

[0039] Figure 6 This is a right-angled view of the floc removal device in an embodiment of this utility model;

[0040] Figure 7 This is a view of the arc or bevel of the floc removal device in the embodiments of this utility model;

[0041] Figure 8 This is a schematic diagram of the inlet and outlet water of the raceway-type aquaculture pond, the residue collection device, and the floc removal device in the first embodiment of this utility model.

[0042] Figure 9 This is a schematic diagram of the inlet and outlet of the raceway-type aquaculture pond, the residue collection device, and the floc removal device in the second embodiment of this utility model.

[0043] Explanation of reference numerals in the attached drawings: 1. Raceway-style aquaculture pond; 11. First long pond wall; 12. Second long pond wall; 13. First short pond wall; 14. Second short pond wall; 15. Bottom wall of the pond; 16. Baffle wall; 21. Jet jet; 22. Aeration pipe; 3. Automatic feeding device; 4. Water quality monitoring device; 5. Residue collection device; 50. Residue collection pond; 51. Collection pipe; 52. First water inlet; 53. First nano-airlift ring; 54. Filter screen; 55. Overflow tray; 56. First outlet; 57. First sewage outlet; 6. Floc removal device; 60. Floc removal tank; 61. Inner sedimentation pipe; 62. Outer sedimentation pipe; 63. Second inlet; 64. Second nano-airlift ring; 65. Second outlet; 66. Sedimentation cone; 67. Second sewage outlet; 7a. Water level in the floc removal tank; 7b. Water level in the racetrack-type aquaculture tank; 9a. Water flow circulation direction; 7b. Module inlet direction; 9c. Module outlet direction. Detailed Implementation

[0044] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] Example

[0048] like Figure 1 The intensive raceway-type biofloc aquaculture system shown in Figure 9 includes a raceway-type culture pond 1, an aeration and water circulation device, an automatic feeding device 3, a water quality monitoring device 4, a residue collection device 5, and a floc removal device 6.

[0049] like Figure 1 As shown, in the first embodiment of the raceway-type aquaculture pond 1, the entire aquaculture system is rectangular, and the raceway-type aquaculture pond 1 is a rounded rectangle; the length and width of the raceway-type aquaculture pond 1 are equal to the length and width of the aquaculture system, and the four corner areas of the aquaculture system not occupied by the raceway-type aquaculture pond 1 are all right-angled inscribed arcs. The automatic feeding device 3, the water quality monitoring device 4, the residue collection device 5, and the floc removal device 6 are respectively installed in one of the corner areas.

[0050] The racetrack-type aquaculture pond 1 includes side walls and a bottom wall 15. The side walls include a first long wall 11 and a second long wall 12, and a first short wall 13 and a second short wall 14, which are arranged opposite each other and are arc-shaped. A baffle wall 16, parallel to the first long wall 11, is located in the middle of the racetrack-type aquaculture pond 1. The baffle wall 16 is positioned between the first long wall 11 and the second long wall 12, and its two ends do not contact the first short wall 13 and the second short wall 14, allowing the water in the racetrack-type aquaculture pond 1 to circulate around the baffle wall 16. Figure 3As shown, the bottom wall 15 of the pool is an inclined slope, with the first short pool wall 13 located at the top of the slope of the bottom wall 15 and the second short pool wall 14 located at the bottom of the slope of the bottom wall 15.

[0051] The aeration and water circulation device includes multiple ejectors 21, a water pump (not shown), and aeration pipes 22. The ejectors are arranged on the four side walls and the baffle wall 16 of the racetrack-type aquaculture pond 1. The ejectors 21 drive the water in the racetrack-type aquaculture pond 1 to circulate along the outer perimeter of the baffle wall 16. Specifically, the ejectors 21 are Venturi ejectors. The interval between two adjacent Venturi ejectors 21 on the side walls is 4-5 meters; the ejectors 21 on the baffle wall 16 are positioned correspondingly to the ejectors 21 on the first long pool wall 11 or the second long pool wall 12, with an interval of 2-3 meters between them. By rationally designing the layout and spacing of each ejector 21 in the aeration and water circulation device, the water flow velocity in the racetrack-type aquaculture pond 1 can be controlled between 0.05 and 0.20 m / s. A water pump is located at the lower end of the raceway-type aquaculture tank 1, and is used to provide high-pressure water to multiple jets 21. An aeration pipe 22 is installed on the side of the first long tank wall 11 near the first short tank wall 13, and is used to introduce air into the aquaculture water in the raceway-type aquaculture tank 1 to ensure that the dissolved oxygen content of the aquaculture water is not less than 5.0 mg / L, providing a suitable aquaculture environment for the normal growth of cultured organisms (e.g., lobsters).

[0052] like Figure 1 As shown, the automatic feeding device 3, water quality monitoring device 4, waste collection device 5, and floc removal device 6 are arranged sequentially along the water flow direction within the raceway-type aquaculture pond 1. Specifically, the automatic feeding device 3 is located in the chamfered area outside the first short pond wall 13 near the first long pond wall 11, and is used to feed the raceway-type aquaculture pond 1; the water quality monitoring device 4 is located in the chamfered area outside the first short pond wall 13 near the second long pond wall 12, and is used to monitor the water quality parameters of the raceway-type aquaculture pond 1; the waste collection device 5 is located in the chamfered area outside the second short pond wall 14 near the second long pond wall 12, and is used to collect aquaculture waste within the raceway-type aquaculture pond 1; the floc removal device 6 is located in the chamfered area outside the second short pond wall 14 near the first long pond wall 11, and is used to collect particulate matter within the raceway-type aquaculture pond 1. Both the waste collection device 5 and the floc removal device 6 are shaped like right-angled inscribed arcs that match the shape of the chamfered area of ​​the rectangular aquaculture system.

[0053] like Figure 2As shown, in the second embodiment of the raceway-type aquaculture pond 1, the difference from the first embodiment of the raceway-type aquaculture pond 1 is that the raceway-type aquaculture pond 1 is octagonal, the first short pond wall 13 and the second short pond wall 14 are both semi-hexagonal, the four corner areas of the aquaculture system not occupied by the raceway-type aquaculture pond 1 are right-angled triangles, and the residue collection device 5 and the floc removal device 6 are both right-angled triangles that match the shape of the corner areas of the rectangular aquaculture system.

[0054] In some embodiments, the lengths of the first long pool wall 11 and the second long pool wall 12 are 10-30 meters, the lengths of the first short pool wall 13 and the second short pool wall 14 are 4-8 meters, and the slope of the pool bottom wall 15 is 0.5°-0.6°. This arrangement can increase the drop between the two ends of the racetrack-type aquaculture pool 1, improve the water circulation effect, and facilitate the effective separation and collection of fish residue.

[0055] In some embodiments, the area of ​​the residue collection device 5 is 0.2%-0.5% of the total area of ​​the rectangular aquaculture system; the area of ​​the floc removal device 6 is 0.2%-0.5% of the total area of ​​the rectangular aquaculture system. By rationally designing the ratio of the area of ​​the residue collection device 5 and the floc removal device 6 to the total area of ​​the aquaculture system, it is possible to ensure that the residue collection device 5 and the floc removal device 6 can effectively remove residues and flocs in the raceway-type aquaculture pond 1, and control the floc concentration to a level that does not affect the aquaculture environment. This achieves the intensive design of the entire aquaculture system and increases the effective aquaculture area ratio in factory farming.

[0056] In some embodiments, the automatic feeding device 3 employs an air-lift method, allowing for fan-shaped spraying of feed with a range of 2-10 meters. Through area spraying and jet-feed circulation, the automatic feeding device 3 can achieve full-pond feeding. The water quality monitoring device 4 uses a real-time probe to monitor parameters such as pH, dissolved oxygen, temperature, and turbidity in the racetrack-style aquaculture pond 1. Both the residue collection device 5 and the floc removal device 6 are shaped like right-angled inscribed arcs or right-angled triangles, matching the shape of the truncated corner areas of the rectangular aquaculture system.

[0057] In some implementations, such as Figure 4 and Figure 5As shown, the waste collection device 5 includes a waste collection pool 50, a collection pipe 51, a first inlet 52, a first nano-airlift ring 53, a filter screen 54, an overflow tray 55, a first outlet 56, and a first sewage outlet 57. The waste collection pool 50 is shaped like a right-angled inscribed arc or a right-angled triangle, matching the shape of the chamfered area of ​​the rectangular aquaculture system. A portion of the second short pool wall 14 separates the racetrack-type aquaculture pool 1 from the waste collection pool 50. The collection pipe 51 is located inside the waste collection pool 50, with openings at both its upper and lower ends. The first inlet 52 is located below the second short pool wall 14, allowing water from the racetrack-type aquaculture pool 1 to enter the waste collection pool 50 through the first inlet 52 and further into the collection pipe 51 through the bottom opening. Multiple first nano-airlift rings 53 are vertically arranged inside the collection pipe 51, and these rings promote the floating of aquatic remains in the water within the collection pipe 51. A filter screen 54 is located at the top of the collection pipe 51 and is used to collect aquatic remains in the water. An overflow tray 55 is used to collect water overflowing from the filter screen 54. A first outlet 56 is located above the second short pool wall 14, allowing water in the overflow tray 55 to flow back to the raceway-type aquaculture pond 1 through the first outlet 56. A first drain outlet 57 is located at the bottom of the remains collection pond 50 and is used to drain silt from the bottom of the remains collection pond 50 or to empty the water in the raceway-type aquaculture pond 1. The remains in the raceway-type aquaculture pond 1 flow with the water circulation into the remains collection device 5. During continuous aeration, the first nano-airlift rings 53 inside the collection pipe 51 lift the remains above the water surface in the remains collection pond 50, where they are collected and separated by the filter screen 54, achieving periodic removal of remains from the aquaculture water. This waste collection device 5 has a simple structure and does not require complex connecting pipes, which can reduce the volume of stagnant water caused by connecting pipes, avoid the pollution of the aquaculture water caused by the rapid proliferation of microorganisms in the stagnant water within the module, and improve the aquaculture effect. Among them, the first nano-airlift ring 53 is an aeration ring made of nano-air tubes.

[0058] Preferably, the vertical distance between the center of the collection tube 51 and the two right-angled surfaces of the residue collection device 5 is 5-25 cm, and the diameter of the collection tube 51 is not less than 160 mm.

[0059] In some implementations, such as Figure 6 and Figure 7As shown, the floc removal device 6 includes a floc removal tank 60, an inner sedimentation pipe 61, an outer sedimentation pipe 62, a second inlet 63, a second nano-airlift ring 64, a second outlet 65, a sedimentation cone 66, and a second discharge outlet 67. The floc removal tank 60 is shaped like a right-angled inscribed arc or a right-angled triangle, matching the shape of the chamfered area of ​​the rectangular aquaculture system. A portion of the second short tank wall 14 separates the racetrack-type aquaculture tank 1 from the floc removal tank 60. The water level 7a in the floc removal tank is higher than the water level 7b in the racetrack-type aquaculture tank. The inner sedimentation pipe 61 is located inside the floc removal tank 60, and its upper end has an opening. The second inlet 63 is located below the second short tank wall 14, and the lower end of the inner sedimentation pipe 61 connects to the second inlet 63. Water from the racetrack-type aquaculture tank 1 enters the interior of the inner sedimentation pipe 61 through the second inlet 63. The second nano-airlift ring 64 is disposed inside the inner settling tube 61, and is used to promote the floating of flocs in the water within the inner settling tube 61. The outer settling tube 62 is located inside the floc removal tank 60 and is sleeved around the outer periphery of the inner settling tube 61. The upper end face of the outer settling tube 62 is higher than the upper end face of the inner settling tube 61, and the upper end face of the outer settling tube 62 is higher than the water level height 7a in the floc removal tank. Water flows out from the upper opening of the inner settling tube 61 and flows to the outer settling tube 62, and then flows to the floc removal tank 60 through the lower opening of the outer settling tube 62. The flocs in the water settle vertically within the outer settling tube 62. The second outlet 65 is disposed above the second short tank wall 14, and the water above the floc removal tank 60 flows back to the racetrack-type aquaculture tank 1 through the second outlet 65. Both the settling cone 66 and the second drain outlet 67 are located at the bottom of the floc removal tank 60. The upper end of the settling cone 66 is inclined to facilitate the flow of sediment from the floc removal tank 60 to the second drain outlet 67. The water in the racetrack-type aquaculture tank 1 flows into the floc removal device 6 with the water circulation. The water enters the inner settling pipe 61 through the second inlet 63. The water in the inner settling pipe 61 is lifted to the top of the inner settling pipe 61 by the air lift effect of the second nano air lift ring 64. Then the water flows to the outer settling pipe 62. The flocs and particles in the water naturally settle downward under the action of gravity. The clarified water returns to the racetrack-type aquaculture tank 1 through the second outlet 65. The flocs and particles accumulate at the settling cone 66 and are discharged through the second drain outlet 67 after a period of accumulation, thus realizing the periodic removal of flocs and particles in the aquaculture water. This floc removal device 6 has a simple structure and does not require complex connecting pipes. This reduces the volume of stagnant water caused by connecting pipes, prevents the rapid proliferation of microorganisms in the stagnant water within the module from polluting the aquaculture water, and improves aquaculture efficiency. The second nano-airlift ring 64 is an aeration ring made of a nano-air tube.

[0060] Specifically, the height of the second inlet 63 of the floc removal device 6 is 25-30 cm higher than the bottom wall 15 of the pool. The water level 7a in the floc removal pool is 5-10 cm higher than the water level 7b in the raceway-type aquaculture pool. The aeration rate of the second nano-airlift ring 64 is adjustable. By adjusting the aeration rate of the second nano-airlift ring 64, the water inflow rate can be adjusted, and the water retention time in the floc removal device 6 can be controlled at 1-1.5 hours to achieve a good settling effect. During the aquaculture process, the sludge settling volume (SV30) of the bio-flocs in the water can be controlled at 0.5-30.0 ml / L.

[0061] like Figure 8 and Figure 9 As shown in the diagram, the thick solid arrow indicates the direction of water circulation, and the thin solid arrow indicates the direction of water inlet to the module; 7b, and the thin dashed arrow indicates the direction of water outlet to the module 9c. The water inlet direction of the residue collection device 5 is set along the long wall of the racetrack-type aquaculture pond 1, and flows from the upper end to the lower end of the racetrack-type aquaculture pond 1; the water outlet direction of the residue collection device 5 is perpendicular to one side of the second short wall 14 and points towards the racetrack-type aquaculture pond 1. The water inlet direction of the floc removal device 6 is perpendicular to the other side of the second short wall 14 and points towards the floc removal device 6, and the water outlet direction of the floc removal device 6 is opposite to the water inlet direction. When the water, flocs, and residues in the racetrack-type aquaculture pond 1 flow from the upper end to the lower end, as the water flow changes direction, larger objects such as residues in the water are affected by centrifugal force and are easily accumulated and removed at the residue collection device 57; while small particles such as flocs in the water flow further to the floc removal device 6, and are collected and removed after vertical sedimentation.

[0062] In summary, the intensive raceway-type biofloc aquaculture system provided by this utility model embodiment designs the raceway-type aquaculture pond 1 as a rounded rectangle or octagon, and the aquaculture system as a rectangle, with the length and width dimensions of the aquaculture system and the raceway-type aquaculture pond 1 being the same. The automatic feeding device 3, water quality monitoring device 4, residue collection device 5, and floc removal device 6 are arranged sequentially at the outer edges of the four corners of the raceway-type aquaculture pond 1 according to the water flow direction in the raceway-type aquaculture pond 1, that is, arranged in the four corner areas of the rectangular aquaculture system not occupied by the raceway-type aquaculture pond 1. The residue collection device 5 and the floc removal device 6 are both inscribed in right-angled arcs or right-angled triangles with the same shape as the corner areas. The residue collection device 5 and the floc removal device 6 do not occupy additional space, which can increase the effective aquaculture area ratio in factory aquaculture. Furthermore, the bottom wall 15 of the pool has a certain slope. By installing jet injectors on the side walls and the middle baffle wall 16 of the racetrack-type aquaculture pool 1, the jet injectors are connected to a water pump to form a circular circulating water flow. Following the direction of the water flow, the automatic feeding device 3 and the water quality detection module are arranged sequentially in the chamfered area on the higher horizontal position, while the two chamfered areas on the lower horizontal position are arranged sequentially in the detritus collection device 5 and the floc removal device 6. The detritus and floc in the racetrack-type aquaculture pool 1 can be effectively removed periodically by the water flow, controlling the concentration of detritus and floc in the water, improving the aquaculture environment of the aquaculture system, and enhancing the aquaculture effect. Moreover, the automatic feeding device 3, the detritus collection device 5, and the floc removal device 6 all use air lifting to deliver feed or water, which has a high degree of matching with the overall system and is highly efficient and energy-saving.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An intensive raceway-type biofloc aquaculture system, characterized in that, The aquaculture system is rectangular in shape and includes a raceway-type aquaculture pond (1), an aeration and water circulation device, an automatic feeding device (3), a water quality monitoring device (4), a residue collection device (5), and a floc removal device (6). The racetrack-type aquaculture pond (1) includes side walls and bottom walls (15); the side walls include a first long wall (11) and a second long wall (12) arranged opposite to each other, and a first short wall (13) and a second short wall (14) arranged opposite to each other, the first short wall (13) and the second short wall (14) being arc-shaped or semi-hexagonal; the bottom wall (15) is an inclined slope, the first short wall (13) being located at the top of the slope of the bottom wall (15), and the second short wall (14) being located at the bottom of the slope of the bottom wall (15); a barrier wall (16) parallel to the first long wall (11) is provided in the middle of the racetrack-type aquaculture pond (1); The aeration and water circulation device includes a plurality of jets (21) installed on the side wall of the pool and the barrier wall (16), the jets (21) being used to drive the water in the raceway-type aquaculture pool (1) to circulate around the outer periphery of the barrier wall (16); The automatic feeding device (3) is located in the chamfered area outside the first short pool wall (13) on the side close to the first long pool wall (11), and is used to feed the racetrack-type aquaculture pond (1). The water quality monitoring device (4) is located in the chamfered area outside the side of the first short pool wall (13) near the second long pool wall (12), and is used to monitor the water quality parameters of the racetrack-type aquaculture pond (1). The residue collection device (5) is located in the chamfered area outside the second short pool wall (14) near the second long pool wall (12), and is used to collect the culture residue in the racetrack-type culture pond (1); The floc removal device (6) is located in the chamfered area outside the side of the second short pool wall (14) near the first long pool wall (11), and is used to collect particulate matter in the racetrack-type aquaculture pond (1).

2. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The residue collection device (5) is in the shape of a right-angled inscribed arc or a right-angled triangle with the same shape as the outer chamfered area of ​​the second short pool wall (14) near the second long pool wall (12). The floc removal device (6) is in the shape of a right-angled inscribed arc or a right-angled triangle with the same shape as the outer chamfered area of ​​the second short pool wall (14) near the first long pool wall (11).

3. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The lengths of the first long pool wall (11) and the second long pool wall (12) are 10-30 meters, the lengths of the first short pool wall (13) and the second short pool wall (14) are 4-8 meters, and the slope of the bottom wall (15) is 0.5°-0.6°.

4. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The aeration and water circulation device includes an aeration pipe (22) installed on the side of the first long pool wall (11) near the first short pool wall (13).

5. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The area of ​​the residue collection device (5) is 0.2%-0.5% of the total area of ​​the aquaculture system; the area of ​​the floc removal device (6) is 0.2%-0.5% of the total area of ​​the aquaculture system.

6. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The interval between two adjacent injectors (21) on the side wall of the pool is 4-5 meters; the injectors (21) on the barrier wall (16) and the injectors (21) on the first long pool wall (11) or the second long pool wall (12) are positioned correspondingly, and the interval between the injectors (21) on the barrier wall (16) and the injectors (21) on the first long pool wall (11) or the second long pool wall (12) is 2-3 meters.

7. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The waste collection device (5) includes a collection pipe (51) with openings at both the top and bottom, a first inlet (52) located below the second short pool wall (14) for water from the racetrack-type aquaculture pond (1) to enter the bottom opening of the collection pipe (51), a plurality of first nano airlift rings (53) located inside the collection pipe (51), a filter screen (54) located at the top of the collection pipe (51) for collecting aquaculture waste, an overflow tray (55) for receiving water overflowing from the filter screen (54), and a first outlet (56) located above the second short pool wall (14) for water from the overflow tray (55) to flow back to the racetrack-type aquaculture pond (1).

8. The intensive raceway-type biofloc aquaculture system according to claim 7, characterized in that, The vertical distance between the center of the collection tube (51) and the two right-angled surfaces of the residue collection device (5) is 5-25 cm, and the diameter of the collection tube (51) is not less than 160 mm.

9. The intensive raceway-type biofloc aquaculture system according to claim 1, characterized in that, The floc removal device (6) includes a settling inner tube (61) with an opening at the upper end, a settling outer tube (62) sleeved on the outer periphery of the settling inner tube (61) and with its upper end face higher than the upper end face of the settling inner tube (61), a second inlet (63) located below the second short pool wall (14) for water from the racetrack aquaculture pond (1) to flow into the settling inner tube (61), a second nano airlift ring (64) located inside the settling inner tube (61), and a second outlet (65) located above the second short pool wall (14) for water from the floc removal device (6) to flow back to the racetrack aquaculture pond (1).

10. The intensive raceway-type biofloc aquaculture system according to claim 9, characterized in that, The height of the second inlet (63) of the floc removal device (6) is 25-30 cm higher than the bottom wall (15) of the pool; the water level inside the floc removal device (6) is 5-10 cm higher than the water level inside the raceway-type aquaculture pond (1).

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