Breeding and breeding system for crayfishes
The described system addresses the limitations of traditional crayfish breeding by integrating a breeding pond with a water treatment system, enhancing water quality and habitat, resulting in high survival rates and efficient seedling production.
Patent Information
- Application Number
- CN202420660932.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-04-02
AI Technical Summary
Existing crayfish breeding methods, particularly those using pond cages, are not applicable to sites without ponds and suffer from low survival rates and poor water quality management, leading to inadequate seedling production.
A system comprising a breeding pond with a vertical inner wall and convex edge, combined with a water treatment pond for purification and circulation, using herringbone-shaped bricks and Hydrilla verticillata for habitat, along with a filtration system including sponge and brush layers, ultraviolet disinfection, and controlled water flow to enhance water quality and breeding efficiency.
Facilitates controlled, large-scale production of crayfish seedlings with high survival rates and improved breeding conditions, minimizing escape and natural enemy threats while ensuring water quality and ease of seedling collection.
Smart Images
Figure CN222170939U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crayfish breeding, and more specifically, to a crayfish seed breeding system. Background Art
[0002] In recent years, the crayfish industry has developed rapidly. In addition to the five traditional crayfish breeding provinces of Hubei, Anhui, Hunan, Jiangsu and Jiangxi, other provinces and cities have also set off a wave of crayfish breeding, resulting in a shortage of crayfish seedlings. At present, the breeding of crayfish seedlings mainly includes the self-breeding method of rice fields, ponds and lotus fields. This seedling cultivation method is relatively rough, the survival rate of seedlings is low, and the quality and quantity of seedlings cannot be guaranteed, which cannot meet the needs of farmers for crayfish seedlings. To solve the rough breeding method of crayfish, the prior art discloses a crayfish pond cage breeding system (Announcement No. CN218789863U), which is convenient for fishing in the cage by using the cage set in the pond and breeding in the same pond, realizing the coupling of the cage and the pond for water exchange, and meeting the water requirements.
[0003] Although the existing breeding system can solve the traditional rough breeding method of crayfish, it is not applicable to breeding sites without ponds and has poor applicability, especially when crayfish seedlings are needed for breeding. The bred shrimp seedlings are very small, and the mesh size of the net cage must be set smaller. The smaller mesh size not only affects the flow of water, but also is not conducive to the discharge of residual bait and feces, affecting the breeding effect of crayfish.
[0004] Therefore, it is urgent to design a crayfish seed breeding system that can overcome the above-mentioned defects to a certain extent. Utility Model Content
[0005] An object of the present invention is to solve at least the above-mentioned disadvantages and to provide at least the advantages to be described below.
[0006] Another object of the utility model is to provide a crayfish brooding shrimp breeding system, which artificially constructs a water treatment pool and a breeding pool in the required breeding site. The breeding pool is used for breeding brooding shrimp and raising seedlings, and the water treatment pool is used for purifying and circulating the water in the breeding pool to meet the water quality requirements and the stimulation of flowing water in the breeding pool, complete the process of breeding brooding shrimp, brooding shrimp eggs and seedling hatching, and seedling cultivation, so as to achieve the purpose of artificially controllable large-scale production of crayfish seedlings.
[0007] The utility model provides a crayfish seed shrimp breeding system, which comprises a breeding pond for breeding seed shrimp and raising seedlings, and a water treatment pond for purifying and circulating water in the breeding pond;
[0008] The breeding pool is an upper-open container, the inner side of the pool wall of the breeding pool is vertical and smooth, the upper end of the pool wall extends a convex edge into the pool, and the convex edge is perpendicular to the pool wall; a herringbone-shaped hollow brick is installed on the inner side of the pool wall, and the installation height is lower than the pool wall height, one end of the herringbone-shaped hollow brick is opened close to the pool wall, and the other end is opened toward the pool;
[0009] The bottom of the breeding pond is provided with an air-filled tube, which is provided with a plurality of air holes and immersed in the water body. One end of the air-filled tube is closed, and the other end is connected with an aerator.
[0010] Preferably, the herringbone hollow bricks are composed of three hollow bricks, wherein the three hollow bricks are arranged with two hollow bricks in the lower layer and one hollow brick in the upper layer is located in the middle above the two hollow bricks in the lower layer, thereby forming a herringbone hollow brick.
[0011] Preferably, Hydrilla verticillata is transplanted in the breeding pond, and the roots of Hydrilla verticillata are wrapped in a box or a bag and sunk to the bottom of the breeding pond.
[0012] Preferably, the inner wall of the bottom of the breeding pond is inclined downward by 4.0-5.0% from the outside to the center, and a sewage outlet is arranged at the lowest point of the bottom of the pond; the sewage outlet is connected to two pipelines, one is connected to the water treatment tank, and the other is connected to the sewage pipe, and each pipeline is provided with a switch valve.
[0013] Preferably, the water treatment tank comprises:
[0014] A first filtering pool, wherein a filter screen is mounted on the upper part of the pool, a sponge layer is stacked above the filter screen, and a brush layer is arranged below the filter screen;
[0015] A second filtering pool, wherein multiple layers of suspended fillers are arranged in the pool;
[0016] A water storage tank, which is used to temporarily store water treated by the first filter tank and the second filter tank;
[0017] a first pipeline, which connects the bottom of the first filter tank with the bottom of the second filter tank,
[0018] a second pipeline, which connects the upper part and the bottom of the second filter tank to the bottom of the water reservoir, and a switch valve is provided on the bottom water outlet of the water reservoir connected to the bottom of the second filter tank;
[0019] Among them, the first filter tank, the second filter tank and the water storage tank are connected in sequence along the water flow direction, the sewage outlet at the bottom of the breeding tank is connected to the top of the sponge layer of the first filter tank through a circulating drainage pipe, and the bottom of the water storage tank is connected to the top of the upper opening of the breeding tank through a circulating water inlet pipe, and the circulating drainage pipe and the circulating water inlet pipe are respectively provided with a first water pump and a second water pump.
[0020] Preferably, it further includes an ultraviolet disinfection device which is arranged on the second pipeline.
[0021] Preferably, the suspended packing includes rubber particles and plastic particles.
[0022] Preferably, the brush layer fills the space in the pool below the filter mesh plate, and the brush layer is formed by arranging multiple brush rollers in a staggered manner.
[0023] Preferably, a filter net is arranged on the sewage outlet, and it is an arc-shaped mesh cover structure with a convex middle.
[0024] Preferably, it further includes a make-up water pipe. One end of the make-up water pipe is connected to an external water source, and the other end is the water outlet of the make-up water pipe, which is connected above the upper opening of the breeding pond. A water flow retarder plate is arranged on the water outlet of the make-up water pipe. A water flow retarder plate is also arranged on the water outlet above the upper opening of the breeding pond where the circulating water inlet pipe is connected. The water flow retarder plate is a horizontally arranged rigid plate body, and the size of the water flow retarder plate is smaller than the size of the upper opening of the breeding pond.
[0025] The utility model has at least the following beneficial effects:
[0026] First, by providing a breeding pond with an upper opening, the breeding pond stores water for breeding broodstock shrimps and seedlings. The water treatment pond is used to purify and circulate the water body of the breeding pond, achieving the purpose of artificially controllable large-scale production of crayfish fry.
[0027] Second, the inner side surface of the pool wall of the breeding pond of the utility model is vertical and smooth, and the upper end of the pool wall extends inwards to form a convex edge, and the convex edge is perpendicular to the pool wall to prevent crayfish from escaping and improve the breeding effect.
[0028] Moreover, "pin"-shaped hollow bricks are erected along the inner side of the pool wall of the breeding pond of the utility model for crayfish to inhabit, hide, mate and hold eggs, so as to improve the breeding effect.
[0029] Furthermore, the inner wall of the bottom of the breeding pond of the utility model slopes gently downward from the outside to the center, and a sewage outlet is arranged at the lowest point of the bottom of the pool, which is conducive to the water in the pool flowing out by means of water pressure and eddy current. And the first filter pond of the utility model is provided with a sponge layer and a filter mesh plate for rough filtration of the water body of the breeding pond. The brush layer below the filter mesh plate can not only buffer and filter the water body, but also provide more space for nitrifying bacteria to attach, which is conducive to biological filtration of the water body; the suspended packing in the second filter pond immersed in the water body is used for nitrifying bacteria to attach, further biologically filtering the water body, which is conducive to effectively purifying the water body of the breeding pond and meeting the needs of artificially controllable large-scale production of crayfish fry.
[0030] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 This is a structural schematic diagram of an implementation method of the crayfish seed breeding system of the utility model;
[0032] Figure 2 It is an enlarged structural schematic diagram of an implementation mode of the Chinese-shaped hollow bricks of the crayfish seed shrimp breeding system of the utility model;
[0033] Figure 3 It is an enlarged structural schematic diagram of another embodiment of the Chinese-shaped hollow brick of the crayfish seed shrimp breeding system of the utility model;
[0034] Figure 4 It is a structural schematic diagram of another embodiment of the crayfish seed shrimp breeding system of the utility model;
[0035] Among them, the water supply pipe 1; the water buffer plate 2; the convex edge 3; the pool wall 4; the hollow bricks 5; the wheel-leaved black algae 6; the sewage outlet 7; the sewage pipe 8; the first water pump 9; the circulating drainage pipe 10; the sponge layer 11; the filter screen plate 12; the first filter tank 13; the second filter tank 14; the suspended filler 15; the bottom water outlet 16; the second pipeline 17; the ultraviolet disinfector 18; the water reservoir 19; the second water pump 20; the circulating water inlet pipe 21; the brush layer 22; the breeding pool 23; the filter screen 24. DETAILED DESCRIPTION
[0036] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.
[0037] It should be noted that the experimental methods described in the following implementation schemes are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial channels unless otherwise specified; in the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "setting" should be understood in a broad sense. For example, they can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The orientation or positional relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.
[0038] As Figure 1-3 shown, the present invention discloses an implementation manner of a crayfish breeding system for breeding parent crayfish, which includes a breeding and rearing pond 23 for breeding parent crayfish and raising seedlings, and a water treatment pond for purifying and circulating the water body of the breeding and rearing pond 23;
[0039] The breeding and rearing pond 23 is an open-top container, and the container can be square or cylindrical. The inner side of the pool wall 4 of the breeding and rearing pond 23 is vertically smooth, and the upper end of the pool wall extends inwards to form a convex edge 3, and the convex edge 3 is perpendicular to the pool wall 4; a triangular hollow brick 5 is erected on the inner side of the pool wall 4, and the erection height is lower than the height of the pool wall 4. One end of the triangular hollow brick 5 is open close to the pool wall, and the other end is open towards the inside of the pool;
[0040] An air charging pipe is arranged at the bottom of the breeding and rearing pond 23, and a plurality of air holes are arranged on the air charging pipe and are immersed in the water body. One end of the air charging pipe is closed, and the other end is communicated with an aerator for oxygenating the water body of the breeding and rearing pond 23 as needed.
[0041] The crayfish breeding system of the present invention can be built indoors or in a greenhouse, with wide applicability and strong controllability. The pool walls of the breeding and rearing pond 23 and the water treatment pond can be built with a concrete structure, which is firm and durable. The length of the convex edge 3 extending inwards to the pool can be 10 cm. If the breeding and rearing pond 23 is set to be square, the pool mouth specifications can be 2.5 m × 2.5 m × 0.6 m, and the highest water level is about 0.45 m. The hollow bricks 5 and the air charging pipe are immersed in the water; the inner four sides of the pool wall of the square breeding and rearing pond 23 are vertically smooth, the triangular hollow bricks 5 are erected around the pool wall, and the air charging pipe is arranged around the bottom of the pool.
[0042] The implementation process of the utility model is as follows: during the day, an aerator is used to supply air into the inflation pipe to oxygenate the water in the breeding pool 23, and at night, the water treatment pool is opened to purify and circulate the water, and the running water is used to stimulate the mating, egg holding, hatching (when breeding the seed shrimp) and molting of the shrimp seedlings (when raising the seedlings), because the molting of the shrimp seedlings means the growth of the shrimp seedlings. The convex edge 3 at the upper end of the wall of the breeding pool 23 can effectively prevent the crayfish from escaping, and the "pin"-shaped hollow bricks 5 are set up around the wall of the pool for the crayfish to live and mate and hold eggs in secret, thereby improving the breeding effect. According to the water quality of the breeding pool 23, the breeding pool 23 can be changed, discharged or cleaned. The water can be changed once a day or once a week.
[0043] On the basis of the above implementation, the inscribed hollow brick 5 includes three hollow bricks 5, wherein the three hollow bricks 5 are arranged in the middle of the two hollow bricks 5 in the lower layer, and the upper hollow brick 5 is located above the two hollow bricks 5 in the lower layer, so as to form an inscribed hollow brick 5; the two hollow bricks 5 in the lower layer can be arranged close to each other (such as Figure 2 As shown), the two hollow bricks 5 of the lower layer may also be separated by a space for suspending a hollow brick 5 of the upper layer (as shown in FIG. Figure 3 As shown in the figure, the amount of hollow bricks 5 is reduced, and more hidden space for habitat is provided. The hollow bricks 5 in the shape of a Chinese character set up around the pool wall can facilitate the crayfish to live in and mate and carry eggs in a hidden manner, so as to improve the breeding effect.
[0044] On the basis of the above implementation, the verticillium 6 is transplanted in the breeding pond, and the planting area accounts for 40-50% of the bottom area of the pond. The roots of the verticillium 6 are wrapped in a box or a bag and sunk into the bottom of the breeding pond. The box or the bag can be wrapped with soil, sand and stones, etc., to provide sinking force and growth matrix for the verticillium 23. Planting the verticillium 23 in the breeding pond can absorb part of the pollutants in the pond, and the crayfish adults and shrimp fry can cling to the verticillium 23, and the verticillium 23 can also be used as bait for the adults and shrimp fry, thereby improving the breeding effect.
[0045] On the basis of the above implementation, the inner wall of the bottom of the breeding pool 23 is inclined downward from the outside to the center at a slope of 4.0-5.0%, and a sewage outlet 7 is arranged at the lowest point of the pool bottom, which is conducive to the outflow of pool water with the help of water pressure and vortex; the sewage outlet 7 is connected to two pipelines, one is connected to the water treatment pool, and the other is connected to the sewage pipe 8, and each pipeline is provided with a switch valve for switching or closing as needed.
[0046] Based on the above implementation, the water treatment pool includes:
[0047] A first filter pool 13 is provided with a filter screen plate 12 at the upper part of the pool, a sponge layer 11 is stacked above the filter screen plate 12, the sponge layer 11 and the filter screen plate 12 are used for coarse filtering of the water in the breeding pool 23, and a brush layer 22 is provided below the filter screen plate 12, the brush layer 22 can not only buffer and filter the water, but also provide more space for nitrifying bacteria to attach, which is conducive to biological filtration of the water;
[0048] The second filtration pool 14 has multiple layers of suspended fillers 15 disposed therein. The suspended fillers 15 immersed in the water are used for nitrifying bacteria to attach to further biologically filter the water.
[0049] A water storage tank 19, which is used to temporarily store the water treated by the first filter tank 13 and the second filter tank 14;
[0050] A first pipeline connects the bottom of the first filter tank 13 with the bottom of the second filter tank 14,
[0051] A second pipeline 17 connects the upper part and the bottom of the second filter tank 14 with the bottom of the water reservoir 19. A switch valve is provided on the bottom water outlet 16 connecting the water reservoir 19 with the bottom of the second filter tank 14, for controlling the connection and disconnection between the bottom of the second filter tank 14 and the water reservoir 19. During normal water purification and circulation, the switch valve between the bottom of the second filter tank 14 and the water reservoir 19 remains closed. When sewage discharge, cleaning, drainage, or water replacement is required, the switch valve between the bottom of the second filter tank 14 and the water reservoir 19 is opened.
[0052] Among them, the first filter tank 13, the second filter tank 14 and the water storage tank 19 are connected in sequence along the water flow direction. The sewage outlet 7 at the bottom of the breeding pool 23 is connected to the top of the sponge layer 11 of the first filter tank 13 through the circulating drainage pipe 10. The bottom of the water storage tank 19 is connected to the top of the upper opening of the breeding pool 23 through the circulating water inlet pipe 21. The circulating drainage pipe 10 and the circulating water inlet pipe 21 are respectively provided with a first water pump 9 and a second water pump 20 for pumping water for circulation, purification and flow.
[0053] On the basis of the above implementation, it also includes an ultraviolet disinfector 18, which is arranged on the second pipeline 17 and is used to perform ultraviolet disinfection on the water treated by the first filter tank 13 and the second filter tank 14, and then flow it into the water storage tank 19 for temporary storage.
[0054] On the basis of the above implementation method, the suspended filler 15 includes rubber particles and plastic particles. Rubber particle layers and plastic particle layers are arranged alternately in the second filter tank 14, or rubber particles and plastic particles are mixed and arranged in multiple layers. Each layer can be filled with a mesh bag or a mesh box. The suspended filler 15 is placed in the second filter tank 14 layer by layer, and the nitrifying bacteria attached to the suspended filler 15 perform biological filtration on the water body.
[0055] On the basis of the above implementation, the brush layer 22 fills the space in the pool below the filter screen plate 12. The brush layer 22 is formed by arranging multiple brush rollers in a staggered manner. The brush roller can be composed of a brush filament adherent (such as a plastic pipe, nylon pipe, plastic rod, nylon rod, etc.) and brush filaments, and the brush filaments are布满 around the periphery of the adherent.
[0056] On the basis of the above implementation, as Figure 4 shown, a filter screen 24 is provided on the sewage outlet 7, which is an arc-shaped mesh cover structure with a middle bulge, facilitating filtration and reducing blockage.
[0057] On the basis of the above implementation, it further includes a water replenishing pipe 1. One end of the water replenishing pipe 1 is connected to an external water source, and the other end is the water outlet of the water replenishing pipe 1, which is connected above the upper opening of the breeding pond 23. A water flow slowing plate 2 is provided on the water outlet of the water replenishing pipe 1. The circulating water inlet pipe 21 is also provided with a water flow slowing plate 2 when connected to the water outlet above the upper opening of the breeding pond 23. The water flow slowing plate 2 is a horizontally arranged rigid plate body, and the size of the water flow slowing plate 2 is smaller than the size of the upper opening of the breeding pond 23. The setting of the water flow slowing plate 2 not only makes the water flow gentle but also can continuously increase oxygen while water enters. A switch valve is provided on the water replenishing pipe 1, which can add water to the breeding pond 23 according to the water volume of the breeding pond 23, or provide water when the breeding pond 23 is changed water and cleaned.
[0058] The implementation process of the present utility model is as follows: During the periods when the breeding pond 23 is not discharging sewage, cleaning, draining, or changing water, the switch valve of the sewage pipe 8 remains closed, and the highest water level of the breeding pond 23 is maintained at about 0.45 m. The hollow bricks 5 and the air charging pipe are immersed in water.
[0059] During the day, the aerator is used to supply air into the air charging pipe to oxygenate the water body in the breeding pond 23. At night, the switch valve of the circulating drain pipe 10 is opened, and the first water pump 9 and the second water pump 20 are started. The water body in the breeding pond 23 sequentially flows from the sewage outlet 7 at the bottom of the breeding pond 23, the first water pump 9, the first filter pond 13, the second filter pond 14, the reservoir 19, the second water pump 20, and then flows into the breeding pond 23 from above the breeding pond 23, purifying and circulating the water body. The flowing water is used to stimulate the mating, egg-carrying, and hatching of breeding shrimps (when breeding breeding shrimps) and the molting of shrimp fries (when breeding fry), because the molting of shrimp fries means the growth of shrimp fries. The convex edge 3 at the upper end of the pool wall of the breeding pond 23 can effectively prevent crayfish from escaping. The "pin" - shaped hollow bricks 5 are erected around the pool wall for crayfish to inhabit, hide, mate, and carry eggs. The breeding pond 23 is planted with Hydrilla verticillata, which can absorb part of the pollutants in the pool. Adult crayfish and shrimp fries can climb on the Hydrilla verticillata, and the Hydrilla verticillata can also serve as food for adult crayfish and shrimp fries, improving the breeding effect.
[0060] When the shrimp fry of the shrimp breeding can be collected, first use the ground dragon net to collect the crayfish shrimp fry in the breeding pond 23. When the ground dragon net cannot collect or is very little, the verticillium and hollow bricks 5 are taken out of the breeding pond 23, and the water is drained to collect the shrimp fry.
[0061] Cultivating crayfish seedlings by the utility model crayfish seedlings breeding system has a high survival rate, which is beneficial to the brooding and hatching of the seedlings. The crayfish seedlings breeding system has the advantages of good ecological environment, easy management, low investment, low energy consumption and convenient seedling collection, and at the same time, can effectively avoid the natural enemies of seedlings (when crayfish are bred in rice fields or outdoors, they are often violated by natural enemies such as flying birds, snakes, frogs, voles, etc., and are now bred in breeding ponds 23, which can be operated indoors or in greenhouses, so that the infringement of these natural enemies on crayfish seedlings can be effectively avoided), prevent crayfish from escaping, and can also facilitate seedling collection, greatly improve the seedling collection rate, and obtain time-controllable large-scale crayfish seedlings. In addition, the crayfish seedlings breeding system can also directly collect the brooding shrimps of the excellent germplasm resources of crayfish, which is used for the preservation and improvement of excellent germplasm resources.
[0062] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized.
Claims
1. Crayfish breeding system, It is characterized in that It includes a breeding pond for breeding shrimp and raising seedlings, and a water treatment pond for purifying and circulating the water in the breeding pond; The breeding pool is an upper-open container, the inner side of the pool wall of the breeding pool is vertical and smooth, the upper end of the pool wall extends a convex edge into the pool, and the convex edge is perpendicular to the pool wall; a herringbone-shaped hollow brick is installed on the inner side of the pool wall, and the installation height is lower than the pool wall height, one end of the herringbone-shaped hollow brick is opened close to the pool wall, and the other end is opened toward the pool; The bottom of the breeding pond is provided with an air-filled tube, which is provided with a plurality of air holes and immersed in the water body. One end of the air-filled tube is closed, and the other end is connected with an aerator.
2. The crayfish seed breeding system according to claim 1, It is characterized in that The Chinese-character hollow brick block comprises three hollow brick blocks, wherein the three hollow brick blocks are arranged in a lower layer with two hollow brick blocks, and an upper layer hollow brick block is located in the middle above the two hollow brick blocks in the lower layer, thereby forming a Chinese-character hollow brick block.
3. The crayfish seed breeding system as claimed in claim 2, It is characterized in that Verticillium hydrillae is transplanted in the breeding pond, and the roots of the verticillium hydrillae are wrapped by boxes or bags and sunk to the bottom of the breeding pond.
4. The crayfish seed breeding system as claimed in claim 3, It is characterized in that The inner wall of the bottom of the breeding pond is inclined downward from the outside to the center at a slope of 4.0-5.0%, and a sewage outlet is arranged at the lowest point of the bottom of the pond; the sewage outlet is connected to two pipelines, one is connected to the water treatment pool, and the other is connected to the sewage pipe, and each pipeline is provided with a switch valve.
5. The crayfish seed breeding system according to any one of claims 1 to 4, It is characterized in that The water treatment pool comprises: A first filtering pool, wherein a filter screen is mounted on the upper part of the pool, a sponge layer is stacked above the filter screen, and a brush layer is arranged below the filter screen; A second filtering pool, wherein multiple layers of suspended fillers are arranged in the pool; A water storage tank, which is used to temporarily store water treated by the first filter tank and the second filter tank; a first pipeline, which connects the bottom of the first filter tank with the bottom of the second filter tank, a second pipeline, which connects the upper part and the bottom of the second filter tank to the bottom of the water reservoir, and a switch valve is provided on the bottom water outlet of the water reservoir connected to the bottom of the second filter tank; Among them, the first filter tank, the second filter tank and the water storage tank are connected in sequence along the water flow direction, the sewage outlet at the bottom of the breeding tank is connected to the top of the sponge layer of the first filter tank through a circulating drainage pipe, and the bottom of the water storage tank is connected to the top of the upper opening of the breeding tank through a circulating water inlet pipe, and the circulating drainage pipe and the circulating water inlet pipe are respectively provided with a first water pump and a second water pump.
6. The crayfish seed breeding system according to claim 5, It is characterized in that It also includes an ultraviolet sterilizer, which is arranged on the second pipeline.
7. The crayfish seed breeding system as claimed in claim 5, It is characterized in that The suspended filler includes rubber particles and plastic particles.
8. The crayfish seed breeding system as claimed in claim 5, It is characterized in that The brush layer fills up the space in the pool below the filter screen plate, and the brush layer is formed by a plurality of brush rollers arranged in a staggered manner.
9. The crayfish seed breeding system according to claim 5, It is characterized in that The sewage outlet is provided with a filter screen which is a curved screen structure with a protrusion in the middle.
10. The crayfish seed breeding system according to any one of claims 6 to 9, It is characterized in that It also includes a water supply pipe, one end of which is connected to an external water source, and the other end is a water outlet of the water supply pipe, which is connected to the upper part of the upper opening of the breeding pond. A water buffer plate is arranged on the water outlet of the water supply pipe. A water buffer plate is also arranged on the water outlet of the circulating water inlet pipe connected to the upper part of the upper opening of the breeding pond. The water buffer plate is a horizontally arranged hard plate body, and the size of the water buffer plate is smaller than the size of the upper opening of the breeding pond.