A tail water recovery device and method for a farming system

Abstract

The application discloses a breeding system tail water recovery device, which comprises a filter assembly; the filter assembly comprises a rotating shaft, one end of the rotating shaft is fixedly connected with a filter, the inner surface of the filter is provided with a filter layer, the surface of the filter, which is far away from the filter layer, is provided with a driving gear and a mud conveying plate, the surface of the driving gear is movably connected with a plurality of driven gears, and the end, which is close to the filter layer, of the surface of the driven gears is fixedly provided with a cleaning brush; the driving gear in the filter drives the driven gears with different numbers of teeth to rotate, so that the cleaning brush brushes and washes the surface of the filter layer; different transmission ratios result in different brushing and washing efficiencies of the cleaning brush, different brushing and washing forces can be applied to quickly clean impurities, the filtering effect of the filter layer is further improved, the device does not need to be paused for cleaning the filter screen, the device can automatically clean the impurities on the surface of the filter layer, remove foam and fuse processing agents during the operation process, the tail water recovery period is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of aquaculture wastewater treatment technology, specifically to a device and method for recycling wastewater from an aquaculture system. Background Technology

[0002] Aquaculture is the activity of reproducing, cultivating, and harvesting aquatic plants and animals under human control. Farmers create suitable growth environments by controlling water quality. However, aquaculture produces wastewater, mainly from regular water changes and the metabolic products of aquatic plants and animals, uneaten feed, and feces. Direct discharge of untreated wastewater causes various forms of pollution, such as high levels of organic matter that depletes dissolved oxygen, leading to oxygen deficiency in the water and affecting the survival of aquatic organisms. It may also contain nutrients such as nitrogen and phosphorus, promoting eutrophication and disrupting the aquatic ecosystem. Therefore, to protect the environment and achieve sustainable development, effective treatment of aquaculture wastewater is essential.

[0003] Patent CN118978199A discloses a wastewater recycling device for an aquaculture system, comprising: a base plate, a cleaning structure, and a cleaning box. By setting up a multi-stage filtration structure, the cleanliness of the wastewater is ensured. By setting up a catalytic structure, the wastewater can be catalytically treated to prevent excessive levels of trace elements. The cleaning structure not only facilitates the cleaning of impurities from the filter screen by aquaculture personnel but also makes it easy to replace the filter screen when it is damaged, solving the problems of inconvenience for aquaculture personnel in cleaning and replacing damaged filter screens.

[0004] However, in the aforementioned patented solutions, the cleaning effect is achieved by controlling the raising and lowering of the filter screen, but this process requires the entire device to be stopped before cleaning can be carried out, resulting in a long wastewater recycling cycle. Furthermore, manual cleaning is delayed and cannot remove impurities from the filter screen in time during its operation, leading to a large amount of impurities clogging the filter screen and affecting filtration efficiency. Therefore, this invention proposes a wastewater recycling device and method for aquaculture systems. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for recycling wastewater from an aquaculture system, in order to solve the problems mentioned in the background above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wastewater recycling device for an aquaculture system, comprising a recycling tank, a variable speed motor and a control panel being provided on the surface of the recycling tank, a drainage pipe being provided on the side of the recycling tank surface near the variable speed motor, a water inlet pipe being provided on the side of the recycling tank surface away from the variable speed motor, a tank cover being provided on the top of the recycling tank, and a filter assembly for filtering aquaculture wastewater being provided inside the recycling tank. Filter assembly: includes a rotating shaft, one end of which is fixedly connected to the output end of a variable speed motor. A filter is fixedly connected to the end of the rotating shaft away from the variable speed motor. A filter layer is provided inside the filter on the surface near the rotating shaft. A drive gear and a mud conveying plate are provided inside the filter on the surface away from the filter layer. A plurality of driven gears are meshed on the surface of the drive gear. A cleaning brush is fixedly provided on the surface of the plurality of driven gears near the filter layer.

[0007] Preferably, the plurality of driven gears are all disposed inside the upper part of the filter, the cleaning brush is in close contact with the surface of the filter layer, the plurality of driven gears have different numbers of teeth, and the speed ratio between them is different when the driving gear controls the rotation of the plurality of driven gears.

[0008] Preferably, the filter layer has an internal cavity, and agitator bars are fixedly arranged on both sides of the cavity. Several groups of agitator bars are evenly distributed around the center of the filter layer on both sides. The several groups of agitator bars on both sides are not connected to each other, and there are gaps between them. Activated carbon particles are filled in the gaps.

[0009] Preferably, an aeration pipe and a triangular block are fixedly provided on the surface of the rotating shaft. Both ends of the surface of the aeration pipe are provided with slots. Several aeration holes are connected through the surface of the aeration pipe. A turntable is also fixedly connected to the end of the rotating shaft near the filter. A drive block is eccentrically fixedly connected to the surface of the turntable.

[0010] Preferably, the recycling bin has a mixing chamber, a pressure chamber, and a collection chamber inside. A scraper is provided between the collection chamber and the recycling bin. A treatment agent and a connecting pipe are fixedly connected inside the mixing chamber. An aeration pipe is rotatably inserted through the surface of the treatment agent and the connecting pipe. The treatment agent and the connecting pipe are respectively wrapped around two slotted surfaces. An air groove is provided at the upper part of the pressure chamber near the filter. The other end of the air groove is inserted through the piston chamber. An exhaust port and an air inlet are connected through the bottom of the piston chamber. A piston disc is slidably disposed inside the piston chamber. A driving component is rotatably connected to the bottom of the piston disc. The end of the driving component away from the piston disc rotates on the surface of the driving block.

[0011] Preferably, a through groove is provided between the mixing chamber and the air pressure chamber, and a water inlet groove is provided between the air pressure chamber and the water inlet pipe. The through groove is located below the middle of the horizontal position of the water inlet groove.

[0012] Preferably, the air pressure chamber is provided with a defoaming assembly, which includes a defoaming plate. The surface of the defoaming plate is provided with a plurality of filter plates, and a drainage groove is provided between the plurality of filter plates. The plurality of filter plates are inclinedly arranged inside the defoaming plate, and the defoaming plate is inclinedly arranged inside the air pressure chamber in the direction of the scraper.

[0013] Preferably, a plurality of connecting plates are fixedly connected to both sides of the surface of the defoaming plate, and a return spring is fixedly connected to the upper surface of the plurality of connecting plates. The defoaming plate is positioned above the triangular block and slides inside the air pressure chamber.

[0014] A method for recycling wastewater from an aquaculture system includes the following steps: S1: Introduce the aquaculture wastewater into a sedimentation tank for sedimentation; S2: The inlet pipe is connected to the middle of the sedimentation tank through a pipe, and the aquaculture wastewater flows into the recycling device by its own pressure. S3: The aquaculture wastewater is filtered through the filter components in the recycling device, and the foam generated during the filtration process is removed through the foam removal components. S4: The treated wastewater flows into the aquaculture pond through the drainage pipe.

[0015] Preferably, in step S3, when filtering aquaculture wastewater through the filtration assembly in the recycling device, activated carbon particles are placed inside the empty tank, filling it halfway. During the rotation of the filter layer, the activated carbon particles are always located relative to the area between the inlet pipe and the inlet tank by their own gravity, adsorbing microorganisms in the wastewater. At the same time, the activated carbon particles are agitated by the stirring strip during the rotation to prevent the activated carbon pores from clogging and improve the adsorption effect.

[0016] The beneficial effects of this invention are as follows: 1. This invention uses a variable speed motor to drive the rotating shaft to rotate, causing the filter and filter layer to rotate. During the filtration process, the filtration area on the surface of the filter layer changes continuously, resulting in a more uniform distribution of impurities, reducing the risk of clogging at a single filtration location, and improving filtration efficiency. 2. This invention uses an internal drive gear to rotate driven gears with different numbers of teeth, causing a cleaning brush to scrub the surface of the filter layer. Different transmission ratios result in different scrubbing efficiencies, allowing for the application of varying scrubbing forces to quickly remove impurities and further improve the filtration effect of the filter layer. The device can automatically clean impurities, remove foam, and incorporate treatment agents on the filter layer surface during operation, reducing the wastewater recovery cycle and improving work efficiency.

[0017] 3. This invention uses the hollow grooves inside the filter layer to place activated carbon particles to adsorb microorganisms. During the rotation, the stirring bar drives the activated carbon particles to turn over. The turning state increases the contact opportunity between the activated carbon and the aquaculture wastewater, avoids local adsorption saturation on the surface of the activated carbon, makes full use of the adsorption capacity, delays the occurrence of adsorption saturation, and improves the filtration efficiency for microorganisms. Attached Figure Description

[0018] Figure 1This is a front view of a wastewater recycling device for an aquaculture system; Figure 2 This is a schematic diagram of a partial internal structure of a wastewater recovery device for an aquaculture system. Figure 3 Another perspective schematic diagram of a wastewater recycling device for an aquaculture system; Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle; Figure 5 This is a schematic diagram of the air pressure chamber structure; Figure 6 This is a schematic diagram of the filter component structure; Figure 7 This is a schematic diagram of the filter layer structure; Figure 8 This is a schematic diagram showing the location of the activated carbon. Figure 9 This is a schematic diagram showing the location of the foam removal component; Figure 10 This is a schematic diagram of the foam removal component. Figure 11 This is a schematic diagram of the aeration pipe structure; In the diagram: 1. Recycling bin; 11. Bin cover; 12. Drainage pipe; 13. Water inlet pipe; 14. Mixing chamber; 15. Pressure chamber; 151. Air trough; 152. Piston chamber; 153. Exhaust port; 154. Piston disc; 155. Drive component; 16. Through groove; 17. Water inlet trough; 18. Collection bin; 19. Scraper; 2. Variable speed motor; 3. Filter assembly; 31. Rotating shaft; 311. Aeration pipe; 312. Groove; 313. Aeration. 314. Hole; 32. Triangular block; 32. Filter; 321. Filter layer; 3211. Empty trough; 3212. Agitator bar; 322. Drive gear; 323. Mud conveying plate; 33. Driven gear; 331. Cleaning brush; 34. Turntable; 341. Drive block; 4. Foam removal assembly; 41. Foam removal plate; 411. Filter plate; 412. Drainage trough; 42. Connecting plate; 43. Return spring; 5. Treatment agent; 6. Connecting pipe; 7. Control panel. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1: like Figures 1 to 8As shown, a wastewater recycling device for an aquaculture system includes a recycling box 1. A variable speed motor 2 and a control panel 7 are provided on the surface of the recycling box 1. A drain pipe 12 is provided on the side of the surface of the recycling box 1 close to the variable speed motor 2, and a water inlet pipe 13 is provided on the side of the surface of the recycling box 1 away from the variable speed motor 2. A box cover 11 is provided on the top of the recycling box 1, and a filter assembly 3 for filtering aquaculture wastewater is provided inside the recycling box 1. Filter assembly 3 includes a rotating shaft 31, one end of which is fixedly connected to the output end of the variable speed motor 2. A filter 32 is fixedly connected to the end of the rotating shaft 31 away from the variable speed motor 2. A filter layer 321 is provided inside the filter 32 near the rotating shaft 31. A drive gear 322 and a mud conveying plate 323 are provided inside the filter 32 away from the filter layer 321. A plurality of driven gears 33 are meshed on the surface of the drive gear 322. A cleaning brush 331 is fixedly provided on the end of the plurality of driven gears 33 near the filter layer 321.

[0021] Several driven gears 33 are disposed inside the filter 32. The cleaning brush 331 is in close contact with the surface of the filter layer 321. The number of teeth of the driven gears 33 is different. When the driving gear 322 controls the rotation of the driven gears 33, the speed ratio between them is different.

[0022] The filter layer 321 has a hollow groove 3211 inside. Stirring strips 3212 are fixedly arranged on both sides of the hollow groove 3211. Several groups of stirring strips 3212 are evenly distributed around the center of the filter layer 321. The several groups of stirring strips 3212 on both sides are not connected to each other, and there are gaps between them. Activated carbon particles are filled in the gaps.

[0023] The recycling bin 1 has a mixing chamber 14, a pressure chamber 15 and a collection box 18 inside. A scraper 19 is provided between the collection box 18 and the recycling bin 1. A through groove 16 is provided between the mixing chamber 14 and the pressure chamber 15. A water inlet groove 17 is provided between the pressure chamber 15 and the water inlet pipe 13. The through groove 16 is located below the middle of the horizontal position of the water inlet groove 17.

[0024] Specific implementation process and working principle: The settled aquaculture wastewater flows into the air pressure chamber 15 inside the recycling box 1 through the water inlet pipe 13. The wastewater inside the air pressure chamber 15 then flows into the mixing chamber 14 through the channel 16. The wastewater inside the mixing chamber 14 flows out to the aquaculture pond through the drainage pipe 12.

[0025] A filter assembly 3 is installed inside the recycling bin 1. The filter layer 321 in the filter assembly 3 is located between the water inlet pipe 13 and the water inlet tank 17 to filter impurities remaining in the effluent. To further improve filtration efficiency, the output end of the variable speed motor 2 drives the rotating shaft 31 in the filter assembly 3 to rotate. The rotation of the rotating shaft 31 drives the filter 32 to rotate, and the filter 32 controls the rotation of the filter layer 321. During the filtration process, the filtration area on the surface of the filter layer 321 changes continuously, making the distribution of impurities filtered on the surface of the filter layer 321 more uniform and reducing the risk of clogging at a single filtration position. Furthermore, in order to remove impurities from the surface of the filter layer 321 in a timely manner to improve the filtration effect, a drive gear 322 is provided inside the filter 32, and several sets of driven gears 33 are meshed with the drive gear 322. A cleaning brush 331 is fixedly connected to the surface of the driven gear 33. During the rotation of the filter 32, the drive gear 322 drives the several driven gears 33 to rotate, thereby causing the cleaning brush 331 to rotate and brush the surface of the filter layer 321. A scraper 19 is provided on one side of the surface of the filter layer 321. The impurities after brushing are scraped off by the scraper 19 during the continuous rotation of the filter 32. The scraped impurities flow into the collection box 18 along the surface of the scraper 19 for collection.

[0026] Furthermore, in order to improve the brushing efficiency of the cleaning brush 331 on the filter layer 321, the number of teeth of the driven gears 33 is set differently, resulting in different transmission ratios between the driving gear 322 and the driven gears 33. As a result, the brushing efficiency of the cleaning brushes 331 on the surface of the filter layer 321 is different, thereby applying different brushing forces to quickly clean impurities and further improve the filtration effect of the filter layer 321.

[0027] To improve the filtration efficiency for microorganisms in the effluent, a hollow groove 3211 is provided inside the filter layer 321. An appropriate amount of activated carbon particles are placed inside the hollow groove 3211 to adsorb microorganisms. During the rotation of the filter layer 321, the activated carbon particles remain at the bottom of the filter layer 321 due to their own gravity, filtering the effluent. Several sets of agitator strips 3212 are installed inside the hollow groove 3211. During the rotation of the hollow groove 3211, the agitator strips 3212 cause the activated carbon particles to tumble. When the activated carbon particles are tumbling, they constantly collide and rub against each other, allowing the activated carbon to come into more thorough contact with the aquaculture effluent, increasing the contact opportunities between the activated carbon surface and microorganisms or pollutants in the water. Continuous tumbling also prevents localized adsorption saturation on the activated carbon surface, allowing for more complete utilization of the activated carbon's adsorption capacity. The tumbling state also ensures that pollutants are evenly distributed on the activated carbon surface, delaying adsorption saturation and improving adsorption efficiency.

[0028] Example 2: like Figures 9 to 11As shown, an aeration pipe 311 and a triangular block 314 are fixedly installed on the surface of the rotating shaft 31. Both ends of the surface of the aeration pipe 311 are provided with slots 312. Several aeration holes 313 are connected through the surface of the aeration pipe 311. A turntable 34 is also fixedly connected to the end of the surface of the rotating shaft 31 near the filter 32. A drive block 341 is fixedly connected to the surface of the turntable 34 eccentrically.

[0029] The mixing chamber 14 is fixedly connected to the treatment agent 5 and the connecting pipe 6. The aeration pipe 311 is rotatably inserted through the surface of the treatment agent 5 and the connecting pipe 6. The treatment agent 5 and the connecting pipe 6 are respectively wrapped around the surface of two slots 312. The upper part of the pressure chamber 15 is provided with an air groove 151 near the filter 32. The other end of the air groove 151 is connected through the interior of the piston chamber 152. The bottom of the piston chamber 152 is connected through an exhaust port 153 and an air inlet. The piston disc 154 is slidably arranged inside the piston chamber 152. The bottom of the piston disc 154 is rotatably connected to a driving component 155. The end of the surface of the driving component 155 away from the piston disc 154 rotates on the surface of the driving block 341.

[0030] The air pressure chamber 15 is equipped with a defoaming assembly 4, which includes a defoaming plate 41. The surface of the defoaming plate 41 is provided with a plurality of filter plates 411. A drainage groove 412 is provided between the plurality of filter plates 411. The plurality of filter plates 411 are inclinedly arranged inside the defoaming plate 41. The defoaming plate 41 is inclinedly arranged inside the air pressure chamber 15 towards the scraper 19.

[0031] Several connecting plates 42 are fixedly connected to both sides of the surface of the descaling plate 41. A return spring 43 is fixedly connected to the upper surface of the connecting plates 42. The descaling plate 41 is located above the triangular block 314 and slides inside the air pressure chamber 15.

[0032] Specific implementation process and working principle: There are harmful substances, organic matter or algal toxins in the effluent. During the effluent transportation or filtration process, these harmful substances will generate foam. In order to prevent these foams from flowing back into the aquaculture pond and polluting the water, the recycling device is equipped with an air pressure chamber 15 and a piston chamber 152 inside the recycling box 1. They are connected by an air groove 151. An air defoaming component 4 is installed inside the air pressure chamber 15, and a piston disc 154 is installed inside the piston chamber 152. The rotation of turntable 34 drives the drive component 155 to move via drive block 341. The movement of drive component 155 pulls piston disc 154 to slide up and down inside piston chamber 152. When piston disc 154 moves downward, gas above the pressure chamber 15 is drawn into the piston disc 154, causing the tailwater below the pressure chamber 15 to be drawn upward and surge. Due to its low density, the foam always floats above the tailwater inside the pressure chamber 15. As the tailwater is drawn upward, the foam is pushed through the surface of the defoaming plate 41 by the water. When piston disc 154 moves upward, the gas inside piston chamber 152 returns to the pressure chamber 15. At this time, the pressure chamber... The tailwater inside chamber 15 flows back down, while the foam, due to its adsorption properties, is adsorbed by the defoaming plate 41 and remains on the upper surface of the defoaming plate 41. The defoaming plate 41 is set at an angle, and the triangular block 314 continuously knocks and vibrates the defoaming plate 41 during rotation, causing the foam to break and become liquid, which flows into the scraper 19 through the drainage channel 412. The defoaming plate 41 is set at an angle inside the pressure chamber 15, which can also transport unbroken foam. A liquid extraction device is set at the bottom inside the scraper 19 to automatically remove the tailwater containing a large amount of toxic substances inside the scraper 19. The liquid extraction process does not affect the up-and-down adsorption and surging effect of the tailwater inside the pressure chamber 15. Meanwhile, an exhaust port 153 and an intake pipe are provided below the piston chamber 152. Both the exhaust port 153 and the intake pipe are equipped with one-way valves, which operate in opposite directions. A chemical agent 5 and a connecting pipe 6 are provided inside the mixing chamber 14. Two sets of slots 312 are provided on the surface of the aeration pipe 311. The chemical agent 5 communicates with one set of slots 312, and the connecting pipe 6 communicates with the other set of slots 312. The other end of the connecting pipe 6 is connected to the exhaust port 153. Furthermore, the two slots 312 are positioned opposite each other, so that during the rotation of the aeration pipe 311, the chemical agent... The treatment agent inside 5 flows into the aeration pipe 311 through the slot 312. At the next moment, the aeration pipe 311 blocks the chemical agent 5, while the connecting pipe 6 is connected to another set of slots 312. Gas enters the aeration pipe 311 through the slot 312, squeezing the treatment agent inside the aeration pipe 311 and expelling it through the aeration hole 313. The liquid treatment agent is sprayed out in a mist form under the pressure of air, which can quickly integrate into the tailwater inside the mixing chamber 14, improving the treatment effect of the tailwater. The treatment agent can be adjusted according to the specific recycling process on site.

[0033] This device can filter the wastewater while using activated carbon to adsorb microorganisms in the water and remove foam formed by harmful substances in the wastewater. At the same time, the treatment agent is sprayed out in a mist and mixed with the wastewater, enabling faster recycling of the wastewater.

[0034] The embodiments described above merely illustrate implementation methods of the present invention and should not be construed as limiting the scope of the invention patent, nor as imposing any form of limitation on the structure of the present invention. It should be noted that those skilled in the art can make various changes and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A wastewater recycling device for an aquaculture system, comprising a recycling tank (1), wherein a variable speed motor (2) and a control panel (7) are disposed on the surface of the recycling tank (1), a drain pipe (12) is disposed on the side of the recycling tank (1) near the variable speed motor (2), a water inlet pipe (13) is disposed on the side of the recycling tank (1) away from the variable speed motor (2), and a tank cover (11) is disposed on the top of the recycling tank (1), characterized in that: The recycling bin (1) is equipped with a filter assembly (3) for filtering aquaculture wastewater. Filter assembly (3): includes a rotating shaft (31), one end of which is fixedly connected to the output end of a variable speed motor (2), and a filter (32) is fixedly connected to the end of the rotating shaft (31) away from the variable speed motor (2). A filter layer (321) is provided inside the filter (32) near the rotating shaft (31). A drive gear (322) and a mud conveying plate (323) are provided inside the filter (32) away from the filter layer (321). A plurality of driven gears (33) are meshed on the surface of the drive gear (322), and a cleaning brush (331) is fixedly provided on the end of the surface of the plurality of driven gears (33) near the filter layer (321). An aeration pipe (311) and a triangular block (314) are fixedly provided on the surface of the rotating shaft (31). Both ends of the surface of the aeration pipe (311) are provided with slots (312). Several aeration holes (313) are connected through the surface of the aeration pipe (311). A turntable (34) is also fixedly connected to the end of the rotating shaft (31) near the filter (32). A drive block (341) is fixedly connected eccentrically to the surface of the turntable (34). The recycling bin (1) has a mixing chamber (14), a pressure chamber (15), and a collection bin (18) inside. A scraper (19) is provided between the collection bin (18) and the recycling bin (1). The mixing chamber (14) is fixedly connected to a treatment agent (5) and a connecting pipe (6). An aeration pipe (311) is rotatably inserted through the surface of the treatment agent (5) and the connecting pipe (6). The treatment agent (5) and the connecting pipe (6) are respectively wrapped around the surface of two slots (312). The pressure chamber (15) has an air supply at the upper part near the filter (32). The other end of the gas groove (151) is disposed inside the piston chamber (152). The bottom of the piston chamber (152) is connected to the exhaust port (153) and the air inlet. The piston disc (154) is slidably disposed inside the piston chamber (152). The bottom of the piston disc (154) is rotatably connected to the drive member (155). The end of the surface of the drive member (155) away from the piston disc (154) rotates on the surface of the drive block (341). The other end of the connecting pipe (6) is connected to the exhaust port (153). A through groove (16) is provided between the mixing chamber (14) and the air pressure chamber (15), and a water inlet groove (17) is provided between the air pressure chamber (15) and the water inlet pipe (13). The through groove (16) is located below the middle of the horizontal position of the water inlet groove (17). The air pressure chamber (15) is provided with a defoaming assembly (4), which includes a defoaming plate (41). The surface of the defoaming plate (41) is provided with a plurality of filter plates (411). A drainage groove (412) is provided between the plurality of filter plates (411). The plurality of filter plates (411) are inclinedly arranged inside the defoaming plate (41). The defoaming plate (41) is inclinedly arranged inside the air pressure chamber (15) in the direction of the scraper (19).

2. The aquaculture system wastewater recovery device according to claim 1, characterized in that: The driven gears (33) are all located inside the filter (32) and above it. The cleaning brush (331) is in close contact with the surface of the filter layer (321). The number of teeth of the driven gears (33) is different. When the driving gear (322) controls the rotation of the driven gears (33), the speed ratio between them is different.

3. The aquaculture system wastewater recovery device according to claim 2, characterized in that: The filter layer (321) has a hollow groove (3211) inside. Stirring strips (3212) are fixedly arranged on both sides of the hollow groove (3211). Several groups of stirring strips (3212) are evenly distributed around the center of the filter layer (321). The several groups of stirring strips (3212) on both sides are not connected to each other, and there are gaps between them. Activated carbon particles are filled in the gaps.

4. The aquaculture system wastewater recovery device according to claim 3, characterized in that: Several connecting plates (42) are fixedly connected to both sides of the surface of the desiccant plate (41), and a reset spring (43) is fixedly connected to the upper surface of the several connecting plates (42). The desiccant plate (41) is located above the triangular block (314), and the desiccant plate (41) slides inside the air pressure chamber (15).

5. A method for recycling wastewater from an aquaculture system, using the wastewater recycling device for an aquaculture system as described in claim 4, characterized in that, Includes the following steps: S1: Introduce the aquaculture wastewater into a sedimentation tank for sedimentation; S2: The inlet pipe (13) is connected to the middle of the sedimentation tank through the pipe, and the aquaculture tailwater flows into the recycling device by its own pressure; S3: The aquaculture wastewater is filtered by the filter assembly (3) in the recycling device and the foam generated during the filtration process is removed by the foam removal assembly (4); S4: The treated wastewater flows into the aquaculture pond through the drainage pipe (12).

6. The method for recycling wastewater from an aquaculture system according to claim 5, characterized in that: In the S3, when the aquaculture wastewater is filtered by the filter assembly (3) in the recycling device, activated carbon particles are placed inside the empty tank (3211). The activated carbon particles are filled halfway inside the empty tank (3211). During the rotation of the filter layer (321), the activated carbon particles always adsorb the microorganisms in the wastewater by their own gravity relative to the area between the water inlet pipe (13) and the water inlet tank (17). At the same time, the activated carbon particles are stirred by the stirring bar (3212) during the rotation to avoid clogging of the activated carbon pores and improve the adsorption effect.

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