A multi-layer circulation water breeding system for archachatina and a method of use

Abstract

This invention aims to provide a multi-layer recirculating aquaculture system for *Bellamya aquatic* snails that reduces external water source usage and achieves high water recycling efficiency, along with its usage method. The invention includes an aquaculture module with a drum microfilter at its outlet for separating particulate matter; a balancing water supply tank connected to the outlet of the drum microfilter for collecting and pre-treating wastewater; a wastewater treatment module connected to the first pumping pipe of the balancing water supply tank for treating wastewater from the bottom layer and source water; an ozone microbial treatment module connected to the second pumping pipe of the balancing water supply tank for treating wastewater from the middle and upper layers; and a balancing water supply tank with its inlet connected to the outlets of the wastewater treatment module and the ozone microbial treatment module, and its outlet connected to the aquaculture module. This invention applies to the technical field of multi-layer recirculating aquaculture systems for *Bellamya aquatic* snails.

Description

Technical Field

[0001] This invention relates to the technical field of multi-layer recirculating aquaculture systems for conch, and particularly to a multi-layer recirculating aquaculture system for conch and its usage method. Background Technology

[0002] The mud snail (Sinocyclocheilus 'Aureobasidium') is widely distributed in the East China Sea and South China Sea of ​​my country, and is an important economic snail species in provinces such as Fujian and Hainan. It inhabits subtidal muddy and sandy bottoms, is a benthic snail, and its meat is delicious and nutritious, making it a popular and valuable seafood product. Due to the limited natural yield of mud snails in natural sea areas, which cannot meet the vast market demand, specialized aquaculture facilities have emerged for large-scale artificial cultivation. During the cultivation process, food residue and snail excrement are directly discharged into the sand layer. The decomposition of these wastes produces a mixture containing nitrogen and phosphorus, causing the sand layer to turn black and polluting the pond water. Cleaning these pollutants is extremely difficult. In particular, long-term pollution accumulation or high-density cultivation can lead to serious disease problems in farmed mud snails, which are significant factors affecting disease incidence and low survival rates. Chinese patent CN216219553U discloses a breeding device for *Bambusa squarrosa*, including a breeding pond with a bottom sloping towards the center to form a drain outlet, and a breeding sand layer inside the pond; a water distribution pipe fixedly installed around the inner perimeter of the breeding pond; a water inlet pipe located at one corner of the breeding pond and connected to the water distribution pipe; a filter mesh laid at the drain outlet at the bottom of the breeding pond; and a mesh screen laid on top of the filter mesh and below the breeding sand, remaining within the sand layer and not completely discharged with the water flow. Uneaten food and excrement accumulate in the sand layer, causing it to deteriorate and turn black, leading to decreased appetite in the *Bambusa squarrosa*, slow growth, and increased disease incidence. The device also suffers from high workload and low production efficiency due to water changes and debris removal, and may cause mechanical damage to the *Bambusa squarrosa*, promoting disease development. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a multi-layer recirculating aquaculture system for *Cyprinus edulis* that reduces the utilization rate of external water sources and has high efficiency in the recycling of aquaculture water, as well as a method for using it.

[0004] The technical solution adopted in this invention is as follows: This invention includes an aquaculture module, the outlet of which is equipped with a drum microfilter for separating particulate matter; a balancing water storage tank, which is connected to the outlet of the drum microfilter for collecting and pre-treating effluent; an effluent treatment module, which is connected to the first pumping pipe of the balancing water storage tank for mechanically filtering, separating foam, and disinfecting the aquaculture effluent and source water with ozone; an ozone microbial treatment module, which is connected to the second pumping pipe of the balancing water storage tank for mechanically filtering the aquaculture effluent and source water and reducing the content of ammonia nitrogen, nitrite, and inorganic salts; and a balancing water supply tank, the inlet of which is connected to the outlets of the effluent treatment module and the ozone microbial treatment module, and the outlet of which is connected to the aquaculture module for collecting the treated aquaculture water and pumping it to the aquaculture module via a circulating water pump.

[0005] Furthermore, the aquaculture module includes an aquaculture pond group, a water supply component, an aeration and oxygen supply component, and a drainage component. The water supply component and the aeration and oxygen supply component are both located at the first end of the aquaculture pond group. The water supply component is connected to the balanced water supply tank. The drainage component is located at the second end of the aquaculture pond group and is connected to the drum microfilter.

[0006] Furthermore, the water supply assembly includes a main water supply pipe for the aquaculture pond, a water supply regulating valve for the aquaculture pond, a bottom cleaning switch valve for the aquaculture pond, an upper water inlet pipe for the aquaculture pond, and a bottom flushing assembly. The main water supply pipe for the aquaculture pond is connected to the balanced water supply tank. One end of the water supply regulating valve for the aquaculture pond and one end of the bottom cleaning switch valve for the aquaculture pond are both connected to the main water supply pipe for the aquaculture pond. The other end of the water supply regulating valve for the aquaculture pond is connected to the upper water inlet pipe for the aquaculture pond. The other end of the bottom cleaning switch valve for the aquaculture pond is connected to the bottom flushing assembly. The upper water inlet pipe for the aquaculture pond is located at the upper part of the aquaculture pond assembly, and the bottom flushing assembly for the aquaculture pond assembly is located at the lower part of the aquaculture pond assembly.

[0007] Furthermore, the aeration and oxygen supply assembly includes a connecting pipe, an air supply pipe, an aeration group, and an aquaculture water oxygen supply group. The air supply pipe is connected to the output end of the connecting pipe, and both the aeration group and the aquaculture water oxygen supply group are connected to the air supply pipe. The aeration group is located at the bottom of the aquaculture pond group, and the aquaculture water oxygen supply group is located in the middle of the aquaculture pond group.

[0008] Furthermore, the aquaculture water oxygenation unit includes an air supply pipe, an air supply regulating valve, an air supply pipe, a connecting pipe, and an air stone. The air supply pipe is connected to the air delivery pipe. One end of the air supply regulating valve is connected to the air supply pipe, and the other end of the air supply regulating valve is connected to the air supply pipe. The air supply pipe has an air hole. One end of the connecting pipe is connected to the air hole, and the other end of the connecting pipe is connected to the air stone.

[0009] Furthermore, the drainage assembly includes a sewage pipe, a sewage collection and drainage pipe, a sewage valve assembly, and a surface drainage assembly. The aquaculture pond assembly forms a sewage collection trough. The sewage pipe is connected to the balance storage tank. The sewage collection and drainage pipe is connected to the first end of the sewage collection trough. The sewage valve assembly is located at the second end of the sewage collection and drainage pipe and is connected to the sewage pipe. The surface drainage assembly is located at the upper part of the aquaculture pond assembly and is connected to the sewage pipe.

[0010] Furthermore, the surface drainage assembly includes a water supply pipe, a drainage trough, an escape-proof net, and an overflow plate. The first end of the water supply pipe is connected to the sewage pipe. The drainage trough is located at the top of the aquaculture pond assembly and is connected to the second end of the water supply pipe. The drainage trough has a drainage outlet. The escape-proof net is located at the drainage outlet. The overflow plate is rotatably connected to the drainage trough.

[0011] Furthermore, the wastewater treatment module includes a tank body, and a secondary vortex sedimentation component, a vortex diverter, a foam separation group, and an ozone aeration component arranged sequentially from bottom to top within the tank body, wherein the secondary vortex sedimentation component; The tank is provided with an inflow channel, a first outlet and a second outlet. The inflow channel is located between the secondary vortex sedimentation component and the vortex diverter. The inflow channel is connected to the first pumping pipe of the balanced water storage tank. The first outlet is located in the middle of the secondary vortex sedimentation component. The second outlet is located in the middle of the foam separation group. Both the first outlet and the second outlet are connected to the balanced water supply tank.

[0012] Furthermore, the ozone microbial treatment module includes a box body and a swirl collection device, a facultative aerobic treatment zone, an aerobic treatment zone, an anaerobic treatment zone, and an ozone aeration device disposed within the box body. The ozone aeration device is located at the lower part of the aerobic treatment zone. The box body forms a first drain outlet, a second drain outlet, and a microbial treatment outlet. The first drain outlet and the second drain outlet are both connected to the lower part of the box body, and the microbial treatment outlet is connected to the balanced water supply tank.

[0013] Furthermore, the circulating water treatment process includes: S1. The drainage component of the aquaculture module discharges the aquaculture wastewater into the drum microfilter, where the drum microfilter filters and separates particulate matter. S2. The wastewater treated by the roller microfilter and the supplemented external source water flow into the balance storage tank, which has the function of homogeneous and balanced water storage for the aquaculture wastewater and the supplemented external source water. S3. The liquid level in the balanced water storage tank is adjusted by the liquid level controller in the tank. The bottom water is pumped to the tailwater treatment module for real-time swirling sludge collection, timed solid-liquid separation, foam separation, and ozone disinfection to remove harmful substances from the water. The middle and upper water in the balanced water storage tank is pumped to the ozone microbial treatment module for real-time swirling sludge collection, timed solid-liquid separation, and ozone microbial denitrification, phosphorus removal, and ultraviolet disinfection for combined purification treatment. S4. After the wastewater is mechanically filtered, biologically filtered, foamed, and disinfected with ozone and ultraviolet light by the wastewater treatment module and the ozone microbial treatment module, it flows by gravity to the balanced water supply tank and is then pumped into the aquaculture pond group by the circulating water supply pump.

[0014] The beneficial effects of this invention are as follows: Because this invention uses a balanced reservoir for preliminary swirling sedimentation of the effluent, it reduces the amount of impurities entering the effluent treatment module and the ozone microbial treatment module, thus improving the efficiency of effluent purification. Connecting the effluent treatment module to the balanced reservoir allows for ozone disinfection and organic matter treatment of the external seawater supplied to the system, reducing disease transmission and improving the survival and success rates of aquaculture. The source water supplied during system operation is directly connected to the effluent treatment module, reducing investment in other auxiliary equipment and lowering overall costs. Simultaneous homogenization and treatment of the external seawater and aquaculture effluent increases the content of trace elements in the water, accelerating the growth rate of the snail. The aquaculture module uses a combination of aeration and water supply components. The aeration group of the aeration group degrades organic matter carried by inorganic particles, separating organic matter encased in sediment from sand particles encased in organic matter. Impurities settle at the bottom of the aquaculture tank, and the bottom flushing group flushes the impurities into the drain pipe, maintaining a clean internal environment of the aquaculture tank and reducing the long-term retention of food residue and excrement that pollutes the aquaculture water. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the process flow of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is another perspective of the structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the structure of the water supply component and the aquaculture pond assembly of the present invention; Figure 5 This is another perspective of the schematic diagram of the water supply components and aquaculture pond assembly of the present invention; Figure 6 This is a schematic diagram of the aeration group and aquaculture pond group of the present invention; Figure 7 This is another perspective of the schematic diagram of the aeration group and aquaculture pond group of the present invention; Figure 8 This is a schematic diagram of the structure of the aquaculture water oxygen supply group of the present invention; Figure 9 This is a schematic diagram of the drainage component and aquaculture pond assembly of the present invention; Figure 10 This is a schematic diagram of the structure of the single drainage component and the aquaculture pond assembly of the present invention. Figure 11 This is a schematic diagram of the structure of the surface drainage assembly and the aquaculture pond assembly of the present invention. Figure 12 This is a schematic diagram of the tailwater treatment module of the present invention; Figure 13 This is a schematic diagram of the structure of the oxygen microbial treatment module of the present invention.

[0016] In the picture: 1. Aquaculture Module; 11. Aquaculture Pond Assembly; 111. Sludge Collection Tank; 12. Water Supply Components; 121. Aquaculture Pond Water Supply Main Pipe; 122. Aquaculture Pond Water Supply Regulating Valve; 123. Aquaculture Pond Bottom Cleaning Switch Valve; 124. Aquaculture Pond Upper Inlet Pipe; 125. Pond Bottom Flushing Assembly; 13. Aeration and Oxygen Supply Components; 131. Connecting Pipe; 132. Air Supply Pipe; 133. Aeration Assembly; 134. Aquaculture Water Oxygen Supply Assembly; 1341. Air Supply Pipe; 1342. Air Supply Regulating Valve; 1343. Air Supply Pipe; 1344. Connecting Pipe; 1345. Air Stone; 14. Drainage Components; 141. Sludge Discharge Pipe; 1142. Sludge Collection and Drainage Pipe; 143. Sludge Discharge Valve Assembly; 144. Surface Drainage Assembly; 1 441. Water supply pipe; 1442. Drainage trough; 1443. Escape prevention net; 1444. Overflow plate; 2. Balanced water storage tank; 3. Tailwater treatment module; 31. Tank body; 32. Secondary vortex sedimentation component; 33. Foam separation group; 34. Swirl diverter component; 35. Inflow channel; 36. First outlet; 37. Second outlet; 38. Ozone aeration component; 4. Ozone microbial treatment module; 41. Box body; 42. Swirl sludge collection component; 43. Facultative oxygen treatment zone; 44. Aerobic treatment zone; 45. Anaerobic treatment zone; 46. Ozone aeration device; 47. First sewage outlet; 48. Second sewage outlet; 49. Microbial treatment outlet; 5. Balanced water storage tank; 6. Roller microfilter. Detailed Implementation

[0017] like Figures 1 to 13As shown, in this embodiment, the present invention includes an aquaculture module 1, the outlet of which is equipped with a drum microfilter 6 for separating particulate matter; a balancing reservoir 2, which is connected to the outlet of the drum microfilter 6, for collecting and pre-treating effluent; an effluent treatment module 3, which is connected to the first pumping pipe of the balancing reservoir 2, for mechanically filtering, separating foam, and disinfecting the aquaculture effluent and source water with ozone; an ozone microbial treatment module 4, which is connected to the second pumping pipe of the balancing reservoir 2, for mechanically filtering the aquaculture effluent and source water and reducing the content of ammonia nitrogen, nitrite, and inorganic salts; and a balancing water supply tank 5, the inlet of which is connected to the outlets of the effluent treatment module 3 and the ozone microbial treatment module 4, and the outlet of which is connected to the aquaculture module 1, for collecting the treated aquaculture water and pumping it to the aquaculture module via a circulating water pump. The drum microfilter 6 is connected to the inlet of the balanced water storage tank 2. The drum microfilter 6 is equipped with a backwashing module. The tailwater flowing in from the outlet of the aquaculture module 1 forms a vortex in the first collection tank along the inlet bend. Some impurities in the tailwater are deposited in the first collection tank. The first pumping pipe is set at the bottom to extract the tailwater containing impurities in the lower layer. The second pumping pipe is set in the middle and upper part to extract the tailwater in the middle and upper layer. The balanced water storage tank 2 is used to initially vortex and settle the tailwater, reducing the amount of impurities entering the tailwater treatment module 3 and the ozone microbial treatment module 4, thereby improving the tailwater purification efficiency. The tailwater treatment module 3 is connected to the balance storage tank 2, which can disinfect the external seawater with ozone and treat water-soluble organic matter, reduce the spread of diseases, and improve the survival rate and success rate of aquaculture. The direct access of the source water reduces the investment in other auxiliary equipment and lowers the overall cost. Simultaneous treatment of the external seawater and tailwater can increase the content of trace elements in the water and accelerate the growth rate of the East Wind Snail. The aquaculture module 1 uses an aeration and oxygen supply component 13 and a water supply component 12 together. The aeration group 133 of the aeration and oxygen supply component 13 is used to degrade the organic matter entrained in the inorganic particles, so that the organic matter wrapped in the sediment and the sand particles wrapped by the organic matter are separated. The impurities settle at the bottom of the aquaculture pond group 11, and the bottom flushing group 125 flushes the impurities into the sewage pipe 141 to flow out, keeping the internal environment of the aquaculture pond clean and reducing the long-term retention of food residue or excrement.

[0018] In this embodiment, the aquaculture module 1 includes an aquaculture pond group 11, a water supply component 12, an aeration and oxygen supply component 13, and a drainage component 14. The water supply component 12 and the aeration and oxygen supply component 13 are both located at the first end of the aquaculture pond group 11. The water supply component 12 is connected to the balanced water supply tank 5. The drainage component 14 is located at the second end of the aquaculture pond group 11 and is connected to the drum microfilter 6. The aquaculture tank assembly 11 includes an aquaculture box, a support frame, and connecting parts. The aquaculture box contains a grid, a sand layer, and a sludge collection trough. The grid is located at the bottom of the aquaculture box and is used to place the sand layer. A reserved cavity is formed between the grid and the bottom of the aquaculture box. An aeration assembly 133 and a bottom flushing assembly 125 are installed in the reserved cavity. The sand layer is placed on the grid for the cultivation of snails. The sludge collection trough is located on the side of the aquaculture box near the drainage assembly 14 and works with the bottom flushing assembly 125 to clean and discharge food residue or excrement deposited at the bottom of the aquaculture box.

[0019] In this embodiment, the water supply assembly 12 includes a main water supply pipe 121 for the aquaculture pond, a water supply regulating valve 122 for the aquaculture pond, a bottom cleaning switch valve 123 for the aquaculture pond, an upper water inlet pipe 124 for the aquaculture pond, and a bottom flushing assembly 125. The main water supply pipe 121 for the aquaculture pond is connected to the balanced water supply tank 5. One end of both the water supply regulating valve 122 and the bottom cleaning switch valve 123 for the aquaculture pond is connected to the main water supply pipe 121 for the aquaculture pond, and the other end of the water supply regulating valve 122 is connected to the upper water inlet pipe 124 for the aquaculture pond. The other end of the bottom cleaning switch valve 123 for the aquaculture pond is connected to the main water supply pipe 121 for the aquaculture pond. One end is connected to the bottom flushing assembly 125. The upper water inlet pipe 124 of the breeding pond is located at the upper part of the breeding pond assembly 11. The bottom flushing assembly 125 is located at the lower part of the breeding pond assembly 11. The breeding pond water supply regulating valve 122 is used to regulate the opening and closing of the upper water inlet pipe 124 and the amount of water entering the pond. The bottom cleaning switch valve 123 of the breeding pond is used to regulate the size and start / stop of the impact water flow of the bottom flushing assembly 125. The upper water inlet pipe 124 of the breeding pond is located at the upper part of the breeding tank and is used to push the breeding water to flow towards the drainage assembly 14, so that the breeding water circulates in the breeding tank as much as possible. The bottom flushing assembly 125 includes a flushing pipe and a diversion pipe. The flushing pipe is connected to the bottom cleaning switch valve 123 of the aquaculture tank. The diversion pipe is perpendicular to the flushing pipe and is connected to the flushing pipe. Multiple flushing holes are provided on the diversion pipe. Water jets are sprayed from the flushing holes to flush food residue or excrement at the bottom of the aquaculture tank to one side of the sludge collection trough.

[0020] In this embodiment, the aeration and oxygen supply assembly 13 includes a connecting pipe 131, an air supply pipe 132, an aeration group 133, and an aquaculture water oxygen supply group 134. The air supply pipe 132 is connected to the output end of the connecting pipe 131. The aeration group 133 and the aquaculture water oxygen supply group 134 are both connected to the air supply pipe 132. The aeration group 133 is located at the bottom of the aquaculture pond group 11, and the aquaculture water oxygen supply group 134 is located in the middle of the aquaculture pond group 11. The aeration unit 133 is equipped with an aeration pipe and an aeration support frame. The aeration pipe is connected to the air supply pipe 132. The aeration support frame is set at the bottom of the aquaculture tank and supports the aeration pipe. Multiple sets of fine pores are formed on the aeration pipe to create dense bubbles. The aeration pipe is a nano aeration pipe with a length of 5.5 meters and an air intake of 10 m³ / h. By increasing air bubbles in the tank, the aeration pipe allows suspended matter in the aquaculture water to come into full contact with the air bubbles, promoting the sedimentation of these suspended matter to the bottom of the sludge tank and effectively removing impurities from the wastewater. At the same time, the aeration pipe can increase the oxygen concentration in the aquaculture water, promote the decomposition and oxidation of organic matter in the wastewater, thereby eliminating odors in the wastewater and reducing odors during the wastewater treatment process.

[0021] In this embodiment, the aquaculture water oxygenation unit 134 includes an air supply pipe 1341, an air supply regulating valve 1342, an air supply pipe 1343, a connecting pipe 1344, and an air stone 1345. The air supply pipe 1341 is connected to the air supply pipe 132. One end of the air supply regulating valve 1342 is connected to the air supply pipe 1341, and the other end of the air supply regulating valve 1342 is connected to the air supply pipe 1343. The air supply pipe 1343 has air holes. One end of the connecting pipe 1344 is connected to the air holes, and the other end of the connecting pipe 1344 is connected to the air stone 1345.

[0022] In this embodiment, the drainage assembly 14 includes a sewage pipe 141, a sewage collection and drainage pipe 142, a sewage valve assembly 143, and a surface drainage assembly 144. The aquaculture pond assembly 11 forms a sewage collection trough 111. The sewage pipe 141 is connected to the balanced water storage tank 2. The sewage collection and drainage pipe 142 is connected to the first end of the sewage collection trough 111. The sewage valve assembly 143 is located at the second end of the sewage collection and drainage pipe 142 and is connected to the sewage pipe 141. The surface drainage assembly 144 is located at the upper part of the aquaculture pond assembly 11 and is connected to the sewage pipe 141. The sewage collection and drainage pipe 142 is equipped with a sewage collection section, a connecting section, and a discharge section. The sewage collection section is connected to the sewage collection tank and is perpendicular to the liquid level of the aquaculture water in the aquaculture tank. The connecting section is located between the sewage discharge section and the discharge section and is at the same height as the liquid level of the aquaculture water in the aquaculture tank. The connecting section is parallel to the liquid level. A connecting regulating valve is installed in the middle of the connecting section for regulating the opening and closing of the connecting section and controlling the flow. The discharge section is connected to the sewage discharge valve group 143. The sewage collection and drainage pipe 142 is designed to control the liquid level in the aquaculture tank. When the liquid level is higher than the lowest position of the connecting section, impurities in the sewage collection section flow from the connecting section to the discharge section through atmospheric pressure difference. The discharge section discharges the impurities to the balance storage tank 2. When the liquid level is lower than the lowest position of the connecting section, the aquaculture water in the aquaculture tank will not flow out along the connecting section, ensuring that the aquaculture water is maintained at a certain height during the growth cycle of the snail and avoiding the possibility of the aquaculture tank being completely emptied due to insufficient water intake. The drain valve assembly 143 is provided with a first valve body and a second valve body. The first valve body connects the sewage collection section and the drain pipe 141, and the second valve body connects the discharge section and the drain pipe 141.

[0023] In this embodiment, the surface drainage assembly 144 includes a water supply pipe 1441, a drainage trough 1442, an escape-proof net 1443, and an overflow plate 1444. The first end of the water supply pipe 1441 is connected to the sewage pipe 141. The drainage trough 1442 is located at the upper part of the aquaculture pond assembly 11 and is connected to the second end of the water supply pipe 1441. The drainage trough 1442 forms a drainage outlet, and the escape-proof net 1443 is located at the drainage outlet. The overflow plate 1444 is connected to... The drainage trough 1442 is rotatably connected, and the overflow plate 1444 is the same width as the breeding box. The surface drainage group 144 uses the overflow plate 1444 to collect the floating liquid on the surface into the drainage trough 1442, so that the foam flows into the balance storage tank 2 along the water supply pipe 1441. The escape-proof net 1443 is designed to effectively prevent the snails from escaping from the water supply pipe 1441. The overflow plate 1444 can adjust the rotation angle according to the liquid level, thereby controlling the maximum liquid level and drainage volume, and improving the surface foam discharge efficiency.

[0024] In this embodiment, the wastewater treatment module 3 includes a tank 31, and a secondary vortex sedimentation component 32, a vortex diverter 34, a foam separation group 33, and an ozone aeration component arranged sequentially from bottom to top within the tank 31. The secondary vortex sedimentation component 32; The barrel 31 is provided with an inflow channel 35, a first outlet 36 and a second outlet 37. The inflow channel 35 is located between the secondary vortex sedimentation component 32 and the vortex diverter 34. The inflow channel 35 is connected to the first pumping pipe of the balanced water storage tank 2. The first outlet 36 is located in the middle of the secondary vortex sedimentation component 32. The second outlet 37 is located in the middle of the foam separation group 33. Both the first outlet 36 and the second outlet 37 are connected to the balanced water supply tank.

[0025] In this embodiment, the ozone microbial treatment module 4 includes a housing 41 and a vortex sludge collection element 42, a facultative oxygen treatment zone 43, an aerobic treatment zone 44, an anaerobic treatment zone 45, and an ozone aeration device 46 disposed within the housing 41. The ozone aeration device 46 is located at the lower part of the aerobic treatment zone 44. The housing 41 has a first drain outlet 47, a second drain outlet 48, and a microbial treatment outlet 49. The first drain outlet 47 and the second drain outlet 48 are both connected to the lower part of the housing 41, and the microbial treatment outlet 49 is connected to the balanced water supply tank 5.

[0026] In this embodiment, the circulating water treatment process of the East Wind Snail multi-layer recirculating aquaculture system includes: S1. The drainage component 14 of the aquaculture module 1 discharges the aquaculture wastewater into the drum microfilter 6, and the drum microfilter 6 filters and separates particulate matter. S2. The wastewater treated by the roller microfilter 6 and the supplemented external source water flow into the balance storage tank 2. The balance storage tank 2 has the function of homogeneous balance storage of aquaculture wastewater and supplemented external source water. S3. The liquid level in the balanced water storage tank 2 is adjusted by the liquid level controller. The bottom water is pumped to the tailwater treatment module 3 for real-time swirling sludge collection, timed solid-liquid separation, foam separation, and ozone disinfection to remove harmful substances from the water. The middle and upper water in the balanced water storage tank 2 is pumped to the ozone microbial treatment module 4 for real-time swirling sludge collection, timed solid-liquid separation, and ozone microbial denitrification, phosphorus removal, and ultraviolet disinfection for joint purification treatment. S4. After mechanical filtration, biological filtration, foam separation, ozone and ultraviolet disinfection of the effluent by the tailwater treatment module 3 and the ozone microbial treatment module 4, the effluent flows by gravity to the balanced water supply tank 5 and is then pumped into the aquaculture pond group 11 by the circulating water supply pump.

[0027] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.

Claims

1. A multi-layered recirculating water system for breeding of Aplysia, characterized in that: include Aquaculture module (1), wherein the outlet of the aquaculture module (1) is equipped with a drum microfilter (6) for separating particulate matter; A balance storage tank (2) is connected to the outlet of the drum microfilter (6) and is used to collect tailwater and perform pretreatment. Tailwater treatment module (3), which is connected to the first pumping pipe of the balanced water storage tank (2), is used to mechanically filter foam separation and ozone disinfection treatment of aquaculture tailwater and source water; The ozone microbial treatment module (4) is connected to the second pumping pipe of the balanced water storage tank (2) and is used for mechanical filtration of aquaculture tailwater and source water and to reduce the content of ammonia nitrogen, nitrite and inorganic salts. A balanced water supply tank (5) is provided, with its inlet connected to the outlets of the tailwater treatment module (3) and the ozone microbial treatment module (4). The outlet of the balanced water supply tank (5) is connected to the aquaculture module (1). The balanced water supply tank (5) is used to collect the treated aquaculture water and pump it to the aquaculture module via a circulating water pump. The aquaculture module (1) includes an aquaculture pond group (11), a water supply component (12), an aeration and oxygen supply component (13), and a drainage component (14). The water supply component (12) and the aeration and oxygen supply component (13) are both located at the first end of the aquaculture pond group (11). The water supply component (12) is connected to the balanced water supply tank (5). The drainage component (14) is located at the second end of the aquaculture pond group (11) and is connected to the drum microfilter (6). The water supply assembly (12) includes a main water supply pipe (121) for the aquaculture pond, a water supply regulating valve (122) for the aquaculture pond, a bottom cleaning switch valve (123) for the aquaculture pond, an upper water inlet pipe (124) for the aquaculture pond, and a bottom flushing assembly (125). The main water supply pipe (121) for the aquaculture pond is connected to the balanced water supply tank (5). One end of the water supply regulating valve (122) for the aquaculture pond and the bottom cleaning switch valve (123) for the aquaculture pond are both connected to the main water supply pipe (121) for the aquaculture pond. The other end of the water supply regulating valve (122) for the aquaculture pond is connected to the upper water inlet pipe (124) for the aquaculture pond. The other end of the bottom cleaning switch valve (123) for the aquaculture pond is connected to the bottom flushing assembly (125) for the aquaculture pond. The upper water inlet pipe (124) for the aquaculture pond is located at the upper part of the aquaculture pond assembly (11), and the bottom flushing assembly (125) for the aquaculture pond assembly (11) is located at the lower part of the aquaculture pond assembly (11).

2. The multi-layered water circulation system for breeding of Aplysia according to claim 1, wherein: The aeration and oxygen supply assembly (13) includes a connecting pipe (131), an air supply pipe (132), an aeration group (133), and an aquaculture water oxygen supply group (134). The air supply pipe (132) is connected to the output end of the connecting pipe (131). The aeration group (133) and the aquaculture water oxygen supply group (134) are both connected to the air supply pipe (132). The aeration group (133) is located at the bottom of the aquaculture pond group (11), and the aquaculture water oxygen supply group (134) is located in the middle of the aquaculture pond group (11).

3. The multi-layer recirculating aquaculture system for *Sinocyclocheilus edulis* according to claim 2, characterized in that: The aquaculture water oxygenation unit (134) includes an air supply pipe (1341), an air supply regulating valve (1342), an air supply pipe (1343), a connecting pipe (1344), and an air stone (1345). The air supply pipe (1341) is connected to the air supply pipe (132). One end of the air supply regulating valve (1342) is connected to the air supply pipe (1341), and the other end of the air supply regulating valve (1342) is connected to the air supply pipe (1343). The air supply pipe (1343) has air holes. One end of the connecting pipe (1344) is connected to the air holes, and the other end of the connecting pipe (1344) is connected to the air stone (1345).

4. The multi-layer recirculating aquaculture system for *Sinocyclocheilus edulis* according to claim 1, characterized in that: The drainage assembly (14) includes a sewage pipe (141), a sewage collection and drainage pipe (142), a sewage valve assembly (143), and a surface drainage assembly (144). The aquaculture pond assembly (11) forms a sewage collection trough (111). The sewage pipe (141) is connected to the balance storage tank (2). The sewage collection and drainage pipe (142) is connected to the first end of the sewage collection trough (111). The sewage valve assembly (143) is located at the second end of the sewage collection and drainage pipe (142) and is connected to the sewage pipe (141). The surface drainage assembly (144) is located at the upper part of the aquaculture pond assembly (11) and is connected to the sewage pipe (141).

5. The multi-layer recirculating aquaculture system for *Sinocyclocheilus edulis* according to claim 4, characterized in that: The surface drainage assembly (144) includes a water supply pipe (1441), a drainage trough (1442), an escape-proof net (1443), and an overflow plate (1444). The first end of the water supply pipe (1441) is connected to the sewage pipe (141). The drainage trough (1442) is located on the upper part of the aquaculture pond assembly (11) and is connected to the second end of the water supply pipe (1441). The drainage trough (1442) has a drainage outlet. The escape-proof net (1443) is located at the drainage outlet. The overflow plate (1444) is rotatably connected to the drainage trough (1442).

6. The multi-layer recirculating aquaculture system for *Sinocyclocheilus edulis* according to claim 1, characterized in that: The tailwater treatment module (3) includes a tank (31), and a secondary swirling sedimentation device (32), a swirling diverter (34), a foam separation group (33), and an ozone aeration device arranged sequentially from bottom to top in the tank (31); The barrel (31) is provided with an inflow channel (35), a first outlet (36) and a second outlet (37). The inflow channel (35) is located between the secondary vortex sedimentation component (32) and the vortex diverter (34). The inflow channel (35) is connected to the first pumping pipe of the balanced water storage tank (2). The first outlet (36) is located in the middle of the secondary vortex sedimentation component (32). The second outlet (37) is located in the middle of the foam separation group (33). Both the first outlet (36) and the second outlet (37) are connected to the balanced water supply tank.

7. The multi-layer recirculating aquaculture system for *Sinocyclocheilus edulis* according to claim 1, characterized in that: The ozone microbial treatment module (4) includes a box (41) and a vortex sludge collection device (42), a facultative oxygen treatment zone (43), an aerobic treatment zone (44), an anaerobic treatment zone (45), and an ozone aeration device (46) disposed in the box (41). The ozone aeration device (46) is located at the lower part of the aerobic treatment zone (44). The box (41) has a first sewage outlet (47), a second sewage outlet (48), and a microbial treatment outlet (49). The first sewage outlet (47) and the second sewage outlet (48) are both connected to the lower part of the box (41). The microbial treatment outlet (49) is connected to the balanced water supply tank (5).

8. A method of using the multi-layer recirculating aquaculture system for *Sinocyclocheilus edulis* as described in any one of claims 1-7, characterized in that, The circulating water treatment process includes: S1. The drainage component (14) of the aquaculture module (1) discharges the aquaculture wastewater into the drum microfilter (6), and the drum microfilter (6) filters and separates the particulate matter. S2. The wastewater treated by the roller microfilter (6) and the supplemented external source water flow into the balance storage tank (2). The balance storage tank (2) has the function of homogeneous balance storage of the aquaculture wastewater and the supplemented external source water. S3. The liquid level in the balanced water storage tank (2) is adjusted by the liquid level controller. The bottom water is pumped to the tailwater treatment module (3) for real-time swirling sludge collection, timed solid-liquid separation and foam separation ozone disinfection to remove harmful substances from the water. The middle and upper water in the balanced water storage tank (2) is pumped to the ozone microbial treatment module (4) for real-time swirling sludge collection, timed solid-liquid separation and ozone microbial denitrification and phosphorus removal and ultraviolet disinfection for joint purification treatment. S4. After mechanical filtration, biological filtration, foam separation, ozone and ultraviolet disinfection of the tailwater by the tailwater treatment module (3) and the ozone microbial treatment module (4), the tailwater flows by gravity to the balanced water supply tank (5) and is then pumped into the aquaculture pond group (11) by the circulating water supply pump.

Images