Factory shelf type breeding system and method suitable for freshwater crayfish

Abstract

The invention discloses a factory shelf type breeding system and method suitable for freshwater crayfish, and the system comprises a breeding pool body which comprises a plurality of breeding modules, each breeding module is of a multi-layer structure, and each multi-layer structure comprises a regulating pool arranged in a single layer and a breeding pool designed in a multi-layer manner; the filtering system comprises a filtering assembly which is arranged in the regulating tank and is communicated with the breeding tank; the water supplementing system comprises a water supplementing header pipe communicated into the adjusting tank, the water supplementing header pipe is externally connected with a water source, and a water supplementing pump is arranged on the water supplementing header pipe; the aeration system comprises an aeration disc and a pure oxygen disc which are laid in the breeding pool; the drainage system comprises a main drainage pipe connected with the breeding module, and the main drainage pipe is communicated with the adjusting pool and the breeding pool and externally connected with a drainage land; the second-layer platform is arranged at the side part of the breeding pool and has a preset height; and the temperature control system comprises a heat preservation water tank and a circulating pipeline which is communicated with the heat preservation water tank and is arranged in the adjusting tank.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aquaculture, in particular to a factory layer type breeding system and method suitable for freshwater crayfish. BACKGROUND

[0002] Freshwater crayfish is a group of freshwater crustaceans with the largest individual and longest lifespan, which has the characteristics of strong adaptability, fast growth, wide food habits and high reproductive rate. Its meat is delicious and nutritious, and it is a favorite aquatic food for people.

[0003] The common freshwater crayfish breeding varieties in China are mainly Procambarus clarkii and Cambaroides. In most areas, traditional breeding methods are still used, and the natural hatching mode in the pond is adopted. The environment is greatly affected, there are many uncontrollable factors, and the hatching period cannot be accurately grasped, and the size of the fry cannot be unified.

[0004] Some fry farms are located in Guangdong, Guangxi and Fujian, and use greenhouse breeding to establish standardized breeding processes, but this method is still limited by region and season, and the land utilization rate is low.

[0005] For example, Chinese patent CN115517217A discloses a layer type fry equipment and fry method suitable for Cambaroides, which can solve the problem of regional and seasonal limitations to some extent, but it has the following problems: 1. Although it also improves productivity through layer type breeding, the water body at the bottom needs to be pumped to the top hatching area, and the flow of water bodies in other layers relies on the gravity of the water body itself, which flows to the lower water body through overflow mode. This way makes the top water overflow to the next layer without filtration, and the impurities are the most in the bottom hatching area, which affects the breeding of crayfish; 2. The water rain shower pipe is provided on the bottom plate, which extends above the highest layer of the fry tray, which is beneficial to the exchange of water and external environment to improve water oxygenation. This method has low efficiency in improving water oxygenation, which further affects the breeding efficiency of crayfish.

[0006] 3. The temperature control of the water body is achieved by constant temperature pipeline, which is connected to the constant temperature unit and balanced in the bottom biochemical tank. The use of constant temperature pipeline alone to control the temperature makes the heat exchange effect not ideal, which affects the breeding of crayfish.

[0007] Therefore, it is necessary to design a freshwater crayfish breeding system or method to solve the problems of regionality, seasonality and the above problems, and improve the land utilization rate. SUMMARY

[0008] The application aims to provide a factory layer breeding system and method for freshwater crayfish to solve the above problems in the prior art.

[0009] The application relates to a factory layer breeding system for freshwater crayfish, which comprises the following components. The breeding pool body comprises a plurality of breeding modules, and each breeding module is a multi-layer structure, wherein the multi-layer structure comprises an adjusting pool arranged in a single layer and a breeding pool designed in a multi-layer mode. The adjusting pool comprises a filter pool and a heating pool. The breeding pool comprises a temporary breeding pool located above the adjusting pool and a plurality of multi-layer breeding pools located above the temporary breeding pool.

[0010] A filter system is arranged in the adjusting pool and communicates with the breeding pool. Each temporary breeding pool and breeding pool is provided with a filter water inlet pipe communicating with the micro filter. The filter water inlet pipe is provided with a filter water pump. The filter system comprises a micro filter communicating with the filter water inlet pipe, filter cotton and ceramic filter material arranged in the filter pool; the filter cotton and ceramic filter material respectively occupy half of the filter pool, and during the filtration, the water body first passes through the filter cotton and then passes through the ceramic ring. The ceramic filter material is a ceramic ring. The filter system is the core of the whole breeding process, and only when the water quality is ensured can the yield of freshwater crayfish fry be improved; the circulation amount of the system is about 1 hour / once.

[0011] The system adopts a three-stage removal process of the micro filter, the filter cotton area and the ceramic filter material, and cooperates with the artificial sewage suction mode to maximize the removal of impurities in the water body.

[0012] A water replenishing system comprises a water replenishing main pipe communicating with the adjusting pool, the water replenishing main pipe is connected with a water source, and the water replenishing main pipe is provided with a water replenishing pump. The water replenishing main pipe communicates with the heating pool. The water replenishing main pipe is led out from the booster pump house, connected to the equipment room and used as the water replenishing of the heat preservation water tank; the water replenishing pipe is arranged along the breeding area stand column, one DN50 branch pipe enters the red claw crayfish breeding area, one water replenishing branch pipe is led out from the water replenishing main pipe for each red claw crayfish breeding system, the water replenishing outlet of the system is connected to the heating area at the bottom of the pool, an automatic water replenishing valve is arranged at the outlet of the pipe, and a manual valve is arranged on the pipe.

[0013] A water replenishment branch pipe is introduced into the breeding tank to form a cycle. Because the water body has a large contact area with air and the temperature is high during breeding, the overall water body evaporation is relatively large. Therefore, in order to ensure that the cycle can be normally carried out and not stopped due to water shortage caused by evaporation, microfiltration machine pollution, etc., an additional water replenishment branch pipe is added. The water replenishment is connected to the heating tank to ensure that the water temperature can be quickly balanced and not cause a significant temperature difference.

[0014] The water replenishment system uses a floating ball valve, which automatically replenishes water below a specified water level.

[0015] The aeration system includes an aeration disc and a pure oxygen disc laid in the breeding tank. The aeration disc and the pure oxygen disc are arranged in the temporary breeding tank and the seedling tank. The input end of the pure oxygen disc is connected to a pure oxygen pipe for external pure oxygen. The input of the aeration disc is connected to an aeration pipe for an external air blower. Under normal circumstances, the aeration pipe provides external air through the air blower. When it is found that the dissolved oxygen in the tank is insufficient, such as when the cycle is paused, the aeration is abnormal, or the power is off, the pure oxygen pipe intervenes at this time to perform emergency treatment to avoid oxygen deficiency.

[0016] Aeration is to improve the water body's dissolved oxygen. Under the breeding density designed by us, the oxygen consumption of the shrimp needs to be connected to the aeration to reach the standard of dissolved oxygen required for shrimp breeding and hatching, which is more than 6 mg / L.

[0017] The drainage system includes a total drainage pipe connected to the breeding module, which is in communication with the conditioning tank and the breeding tank and is externally connected to a drainage site. The drainage site includes a septic tank, which can be connected through a drainage site.

[0018] The total drainage pipe is in communication with the filter tank, the heating tank, the temporary breeding tank, and the seedling tank. The second layer platform is arranged on the side of the breeding tank and has a predetermined height. The breeding module has a height of 3.5 meters. In order to facilitate the maintenance and management of the three-layer and four-layer water tanks by the management personnel, an operation platform is designed at a height of 2.2 meters. The second layer is fully connected, and the operator can reach any breeding area on the platform. At the same time, an automatic lifting machine can be added to facilitate the operator to go up and down the platform.

[0019] The temperature control system includes: The heat preservation water tank is provided with a mechanical water replenishment valve in communication with the water replenishment main pipe. The heat preservation water tank is provided with a remote water meter. The circulation pipeline includes a hot water inlet pipe and a hot water outlet pipe in communication with the heat preservation water tank, and a heating coil pipe in the conditioning tank in communication with the hot water inlet pipe and the hot water outlet pipe. The heating coil pipe is a stainless steel finned tube. The heating coil is arranged in the heating tank; A hot water pump is arranged on the hot water inlet pipe or the hot water outlet pipe; The heat preservation water tank is connected with an air source heat pump and a solar heating system through pipelines, and when the pipelines are connected, the heating pump is used to pump the water into the air source heat pump or the solar heating system to heat the water.

[0020] The air source heat pump and the solar heating system belong to the prior art, and can be selected according to actual needs in the field; The centralized heating mode is used, the heat preservation water tank is arranged, the air source heat pump and the solar heating mode are used to ensure the water temperature of the water tank, the hot water inlet pipe and the hot water outlet pipe connected with the heat preservation water tank are designed, and the two ends of the heating coil in the heating tank at the bottom are connected; An electric control valve is arranged on the hot water inlet pipe, and a temperature probe is arranged in the hot water outlet pipeline or the ceramic filter area of the adjusting tank, when the water temperature reaches the set starting value, the temperature probe sends a signal to control the electric valve to open, and the hot water enters the heating coil to heat the breeding water through heat exchange; When the water temperature reaches the set closing value, the temperature probe sends a signal to control the electric valve to close; The heating coil is made of stainless steel finned pipe, the pipeline diameter is DN25, the fin height is about 9.5mm, the heat exchange area of this type of pipeline is large, and the heat exchange efficiency is higher than that of ordinary stainless steel hose in the same time.

[0021] A water supply system is arranged to connect the adjusting tank and the breeding tank; The heated hot water is introduced into the breeding tank through the water supply system; The water supply system comprises a water supply pipe, the water supply pipe is provided with water supply branch pipes connected with the breeding tanks, and valves are arranged on the water supply branch pipes; The water supply pipe is connected with the heating tank, and a water supply pump is arranged on the water supply pipe; The present application comprises a breeding tank body by designing a multi-layer structure breeding module, thereby improving the land utilization rate, space utilization efficiency, and unit area seedling yield of the existing factory breeding of freshwater crayfish; A temperature control system is designed to solve the limitation of climate and region on seedling breeding, and realize the supply of seedlings throughout the year and in the whole country; Through artificial regulation and control of water body, nutrition strengthening and other technologies, a more efficient and strict management mode is adopted to improve the survival rate of indoor seedling and reduce diseases; And large quantities of seedlings are uniformly produced, and the specifications of the seedlings are uniform.

[0022] A factory layer rack type breeding method suitable for freshwater crayfish, comprising: Step 1, nitrifying bacteria culture: culture nitrifying bacteria three weeks in advance, use 340 kg of ceramic filter material for each breeding module, put all the ceramic filter material into the bacteria culture pool in bags, add 1 part of nitrifying bacteria culture medium per ton of water, shade, aerate, and incubate at a constant temperature of 25℃ for 20 days, then use the ceramic filter material; Step 2, after cleaning and disinfecting the breeding system, put 6 pvc shrimp nests in each breeding pool, put in ceramic filter material, add water and circulate, and control the water temperature at 21℃, consistent with the temperature of the breeding environment of the seed shrimp; Step 3, select red claw crayfish for seed shrimp; Step 4, the selected seed shrimp is soaked in the disinfection pool for 15 minutes and then placed in the corresponding breeding pool, the ratio of breeding pool for male shrimp to breeding pool for female shrimp is 1:3 (3 pools for male shrimp, 9 pools for female shrimp); Place 300 seed shrimps in each pool, and spray 1 part of anti-stress agent in the pool for 3 consecutive days after the seed shrimps are placed in the pool; Step 5, temporary breeding for 3 days, increase the temperature by 0.5℃ in the morning and evening respectively, increase the temperature to 23℃ through the temperature control system, and keep the temperature; Step 6, one week before pairing, increase the temperature by 0.5℃ in the morning and evening respectively, increase the temperature to 27℃ through the temperature control system, after the water temperature reaches 27℃, pair the seed shrimps according to the ratio of female to male of 3:1, the breeding pools in the same layer are a group (4 breeding pools), after pairing, spray 1 part of anti-stress agent for 3 consecutive days; Step 7, after artificial pairing for 30 days, carry out screening and transfer in turn, pick out male shrimps separately, check the abdomen of female shrimps, and pick out female shrimps without eggs separately; Classify and screen the egg-bearing shrimps according to stages I, II, III and IV; Place the female shrimps without eggs and male shrimps in the temporary breeding pool for pairing again, place the egg-bearing shrimps according to the classification in the breeding pool for hatching, and the number of shrimps in each pool is within 300; Spray 1 part of anti-stress agent after placing the egg-bearing shrimps in the breeding pool, and hatch for about 30-40 days, the egg-bearing shrimps at different stages are hatched in turn, collect the shrimps on the collection net every day, and when a large number of shrimps are hatched, empty the egg-bearing shrimps and collect all the shrimps; Step 8, feed feeding: the feed is 25% clam meat, 15% pumpkin, 5% oatmeal, 5% soybean and 50% fermented feed, among which clam meat is fed for 1 day and stopped for 1 day; Add feed additives, 2% speed supplement 100, 2% devi whole process feeding, 2% by water, and 2% pio acid feeding for 7 days and stopping for 7 days; The initial feeding amount is 2% of the body weight of the shrimps, and the feeding amount is gradually increased by 1% to 8% of the body weight of the shrimps according to the feeding condition, and the shrimps are fed 3 times a day; The feeding amount for the egg-bearing shrimps during the hatching period is 4-5% of the body weight of the shrimps, and the shrimps are fed once in the evening.

[0023] Step 9: water quality control: long-term spraying of Bacillus subtilis, spraying at 9:00 am every day; long-term spraying of Lactobacillus, spraying before feeding in the evening every day, and filtering through the filtering system.

[0024] In further embodiments, the red claw crayfish to be kept as parents need to meet the following conditions: Shrimp age: 8-9 months old; Body weight specification: female shrimp specification 50-65g, male shrimp specification 60-75g.

[0025] Physical activity: crawling around, turning over and crawling on its own within a predetermined time after turning over; Appearance: four limbs are complete and the shape is standard; the shrimp shell surface is smooth and hard, the body surface and abdomen are free of ciliates, filamentous algae and other attachments, and there are no black-brown or gray-white spots and other diseases; the tail is complete without water bubbles and ulcers; 1 portion of nitrifying bacteria culture medium includes: 20g of tryptone, 38.2g of ammonium chloride, 71.4g of sodium bicarbonate, and 18.85g of disodium hydrogen phosphate; 4 bottles of Kedi nitrifying bacteria and 4 bottles of Kedi bacteria feed; daily detection of ammonia nitrogen and nitrite, and after all are reduced to 0, add 1 portion of culture medium per ton of water body for cultivation again; 1 portion of anti-stress agent includes 12g of vitamin C and 2g of Baijiling; When controlling the water temperature, the air source heat pump or the solar heating system is used to heat the water in the heat preservation water tank, and the heated water is circulated through the hot water outlet pipe, the hot water inlet pipe and the heating coil to heat the breeding water in the heating pool. The air source heat pump or the solar heating system can be selected according to the actual situation.

[0026] When the filtering system is working, the breeding water enters the microfilter through the filtering inlet pipe to filter out particulate impurities, then passes through the filter cotton for secondary filtration, and finally passes through the ceramic filter material for tertiary filtration. Through three-stage filtration and manual suction, the breeding water is filtered, and the filtered water can be discharged into the heating pool through overflow or designed pipeline, and then discharged into the corresponding breeding pool after heat exchange through the water supply pipe. When overflowing, the overflow port is designed at the ceramic filter material area of the secondary filtration pool, and the overflow port is connected with the heating pool. When designing the pipeline, the ceramic filter material area is directly connected with the heating pool, and a valve is designed on the pipeline. When the water replenishing system is working, the heating pool is replenished with water through the water replenishing main pipe, and the heat preservation water tank can also be replenished with water. When the aeration system is working, pure oxygen is provided to the pure oxygen disc through the pure oxygen pipe, and the pure oxygen is discharged into the breeding pool or the temporary breeding pool through the pure oxygen pipe. The aeration disc provides gas to the aeration disc through the aeration pipe, and the aeration disc performs aeration work on the temporary breeding pool or the breeding pool. When the drainage system is working, the water that needs to be discharged is discharged through the main drain pipe.

[0027] Beneficial effects: The present invention discloses a factory-based layered breeding system and method suitable for freshwater crayfish. The present invention improves the land utilization rate and space utilization efficiency of existing factory-based freshwater crayfish seedling cultivation by designing a multi-layered breeding module to form a breeding pond, thereby increasing the seedling yield per unit area. By designing a filtration system, the water in the temporary holding pond and the breeding pond is filtered. During filtration, the water enters the microfiltration machine through the filter water inlet pipe to filter out particulate impurities, then passes through the filter cotton for secondary filtration, and finally passes through the ceramic filter material for thrice filtration. After three-stage filtration and combined with artificial sewage suction, the filtration of the breeding water is completed. The filtered water can be discharged into the heating pool through overflow or designed pipes, and then discharged into the corresponding breeding pond through the water supply pipe after heat exchange; A temperature control system was designed to address climate and regional restrictions on seedling breeding, ensuring year-round, nationwide seedling supply. Heat exchange was achieved by designing an insulated water tank and a heating coil connected to the tank and located within the heating pool. The heating coil was designed as a stainless steel finned tube, resulting in a better heat exchange effect. By artificially controlling water quality and nutrient enrichment, we adopt more efficient and strict management models to improve the survival rate of indoor seedlings and reduce diseases. By designing an aeration system, the dissolved oxygen in the water of the temporary holding pond and nursery pond is increased. At the same time, two methods of increasing dissolved oxygen in the water are designed: external fans and external pure oxygen. Different methods of increasing dissolved oxygen can be selected based on different environments to avoid abnormalities during the crayfish breeding process. This will enable large-scale uniform emergence of seedlings with uniform specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 It is a schematic diagram of the working process of the temperature control system of the present invention.

[0030] Figure 3 Schematic diagram of control group 1 and control group 2 of the present invention.

[0031] Figure 4 It is a schematic diagram of the connection relationship structure of the temperature control system of the present invention. DETAILED DESCRIPTION

[0032] The present application relates to a factory-based shelf-type breeding system suitable for freshwater crayfish, which is explained in detail below through specific implementation methods.

[0033] A factory layer type breeding system and method suitable for freshwater crayfish, comprising: A breeding pool body, comprising a plurality of breeding modules, and each breeding module is a multi-layer structure, and the multi-layer structure comprises a regulating pool arranged in a single layer and a breeding pool designed in multiple layers; The regulating pool comprises a filter pool and a heating pool; The breeding pool comprises a temporary breeding pool above the regulating pool, and a plurality of multi-layer breeding pools above the temporary breeding pool.

[0034] Taking four sets of breeding modules, each set of breeding module has four layers as an example; The four sets of breeding modules are placed in a square shape, the bottom layer is the first layer, and the top layer is the fourth layer; Among them, the first layer is the regulating pool, which comprises a filter pool and a heating pool; The second to fourth layers are breeding pools, wherein the second layer is designed as a temporary breeding pool, and the third and fourth layers are designed as breeding pools; Among them, the filter pool and the heating pool are single pool bodies, the temporary breeding pool is four pool bodies, and the breeding pool is eight pool bodies, that is, in addition to the two pool bodies of the bottom layer regulating pool, the second to fourth layers are all four pool bodies, totaling fourteen pool bodies.

[0035] A filter system, a filter assembly arranged in the regulating pool and communicating with the breeding pool; Each temporary breeding pool and breeding pool is provided with a filter water inlet pipe communicating with the micro filter; The filter assembly comprises a micro filter communicating with the filter water inlet pipe, filter cotton and ceramic filter material arranged in the filter pool; the filter cotton and ceramic filter material respectively occupy half of the filter pool, and during filtration, the water body first passes through the filter cotton and then passes through the ceramic ring; The ceramic filter material is a ceramic ring; A filter water pump is arranged on the filter water inlet pipe; The filter system is the core of the entire breeding process, only by ensuring the water quality of the water body can the yield of freshwater crayfish fry be improved, and the circulation amount of the system is about 1 hour / time.

[0036] The system adopts a three-stage removal process of micro filter, filter cotton area and ceramic filter material, and cooperates with manual sewage suction to maximize the removal of impurities in the water body.

[0037] A water replenishment system, comprising a water replenishment main pipe communicating with the regulating pool, the water replenishment main pipe being connected to a water source, and the water replenishment main pipe being provided with a water replenishment pump; The water replenishment main pipe communicates with the heating pool; The water replenishing main pipe is led out from the booster pump house, connected to the equipment room, and used as water replenishing for the heat preservation water tank. The water replenishing pipe is laid along the stand of the breeding area, and one DN50 branch pipe enters the red claw crab breeding area. Each set of red claw crab breeding system is separately connected to one water replenishing branch pipe from the water replenishing main pipe, and the water replenishing outlet of the system is connected to the pool bottom heating area. An automatic water replenishing valve is arranged at the outlet of the pipe, and a manual valve is arranged on the pipe.

[0038] A water replenishing branch pipe is separately connected to the breeding pool to form a circulation. Because the water body has a large contact area with air and the temperature is high during breeding, the evaporation of the whole water body is relatively large. Therefore, in order to ensure that the circulation can normally proceed and the equipment will not stop running due to water shortage caused by evaporation, microfiltration machine pollution, etc., an additional water replenishing branch pipe is added. The water replenishing is connected to the heating pool to ensure that the water temperature can be quickly balanced and no obvious temperature difference is caused.

[0039] The water replenishing system adopts a float valve, which automatically replenishes water when the water level is below a certain limit.

[0040] The aeration system includes an aeration disc and a pure oxygen disc laid in the breeding pool. The aeration disc and the pure oxygen disc are arranged in the temporary breeding pool and the seedling breeding pool. The input end of the pure oxygen disc is connected to a pure oxygen pipe connected with external pure oxygen. The input of the aeration disc is connected to an aeration pipe connected with an external air blower. The aeration pipe normally provides external air through the air blower. When it is found that the dissolved oxygen in the pool body is insufficient, such as when the circulation is paused, the aeration is abnormal, or the power is off, the pure oxygen pipe is connected to work at this time to perform emergency treatment to avoid oxygen deficiency.

[0041] Aeration is used to improve the water body dissolved oxygen. Under the breeding density designed by us, the oxygen consumption of the seed shrimp needs to be additionally connected to the aeration to reach the standard of the dissolved oxygen required for the seed shrimp breeding and hatching, which is more than 6 mg / L.

[0042] The drainage system includes a total drainage pipe connected with the breeding module, which is communicated with the adjusting pool and the breeding pool and is externally connected with a drainage site. The drainage site includes a septic tank. The total drainage pipe is communicated with the filter pool, the heating pool, the temporary breeding pool and the seedling breeding pool. The second layer platform is arranged at the side of the breeding pool and has a predetermined height. The height of the breeding module is 3.5 meters. In order to facilitate the maintenance and management of the three-layer and four-layer pools by the management personnel, an operation platform is designed at a height of 2.2 meters. The second layer is completely communicated, and the operator can reach any breeding area on the platform. At the same time, an automatic lifting machine can be additionally arranged to facilitate the operator to go up and down the platform.

[0043] The temperature control system includes: The heat preservation water tank is provided with a mechanical water supplement valve communicated with the water supplement main pipe; and the heat preservation water tank is provided with a remote water meter; The circulating pipeline comprises a hot water inlet pipe and a hot water outlet pipe communicated with the heat preservation water tank, and a heating coil communicated with the hot water inlet pipe and the hot water outlet pipe and located in the adjusting pool; the heating coil is a stainless steel finned tube; The heating coil is arranged in the heating pool; The hot water inlet pipe or the hot water outlet pipe is provided with a hot water pump; The heat preservation water tank is connected with an air source heat pump and a solar heating system through pipelines; when the pipelines are connected, the water body is pumped into the air source heat pump or the solar heating system to heat the water body through the designed heat pump.

[0044] The air source heat pump and the solar heating system belong to the prior art and can be selected according to actual needs in the field; The centralized heating mode is adopted, the heat preservation water tank is arranged, the air source heat pump and the solar heating mode are adopted to ensure the water temperature of the water tank, the hot water inlet pipe and the hot water outlet pipe communicated with the heat preservation water tank are designed, and the two ends of the heating coil in the heating pool at the bottom are connected; An electric control valve is arranged on the hot water inlet pipe, and a temperature probe is designed in the hot water outlet pipeline or the ceramic filter area of the adjusting pool; when the water temperature reaches the set starting value, the temperature probe sends a signal to control the electric valve to be opened, the hot water enters the heating coil, and the breeding water body is heated through heat exchange; When the water temperature reaches the set closing value, the temperature probe sends a signal to control the electric valve to be closed; The heating coil is arranged using a stainless steel finned tube, the pipeline diameter is DN25, the fin height is about 9.5 mm, the heat exchange area of this type of pipeline is large, and the heat exchange efficiency is higher than that of ordinary stainless steel hoses in the same time.

[0045] A water supply system is connected with the adjusting pool and the breeding pool; The heated hot water is introduced into the breeding pool through the water supply system; The water supply system comprises a water supply pipe, the water supply pipe is provided with water supply branch pipes communicated with the breeding pools, and the water supply branch pipes are provided with valves; The water supply pipe is communicated with the heating pool, and the water supply pipe is provided with a water supply pump; The present application comprises a breeding pool body by designing a multi-layer structure breeding module, thereby improving the land utilization rate, the space utilization efficiency of the existing factory breeding of freshwater crayfish, and improving the yield of seedlings per unit area; A temperature control system is designed to solve the limitation of climate and region on seedling breeding, and realize the supply of seedlings throughout the year and in the whole country; Through artificial regulation of water body, nutrition strengthening and other technologies, more efficient and strict management mode is adopted to improve the survival rate of indoor seedling and reduce diseases. Further, large-scale uniform emergence is realized, and the emergence specifications are uniform.

[0046] A factory layer type breeding method suitable for freshwater crayfish, comprising: Step 1, nitrifying bacteria culture: culture nitrifying bacteria three weeks in advance, use 340 kg ceramic filter material for each breeding module, all ceramic filter materials are bagged and put into bacteria culture pool, add 1 part of nitrifying bacteria culture medium per ton of water, and culture under shading, aeration and constant temperature of 25℃ for 20 days, and then use ceramic filter material; Step 2, after cleaning and disinfecting the breeding system, put 6 pvc nests into each breeding pool, put ceramic filter material, add water and circulate, and control water temperature at 21℃, which is consistent with the breeding environment temperature of the seed crayfish; Step 3, select red claw crayfish as seed crayfish; Step 4, the selected seed crayfish is soaked in the disinfection pool for 15 minutes and then put into the corresponding breeding pool, and the ratio of the breeding pool for male crayfish to the breeding pool for female crayfish is 1:3 (3 pools for male crayfish and 9 pools for female crayfish); Put 300 seed crayfish into each pool, and spray 1 part of anti-stress agent in the pool for 3 consecutive days after the seed crayfish are put into the pool; Step 5, temporary breeding for 3 days, increase the temperature by 0.5℃ in the morning and evening respectively, increase the temperature to 23℃ through the temperature control system and keep it; Step 6, increase the temperature by 0.5℃ in the morning and evening respectively for one week before pairing, increase the temperature to 27℃ through the temperature control system, and after the water temperature reaches 27℃, pair the seed crayfish according to the ratio of female to male of 3:1, and the breeding pools in the same layer form a group (4 breeding pools), and after pairing, spray 1 part of anti-stress agent for 3 consecutive days; Step 7, after artificial pairing for 30 days, carry out screening and transfer in turn, pick out male crayfish alone, check the abdomen of female crayfish, and pick out female crayfish without eggs alone; Classify and screen the egg-bearing crayfish according to stages I, II, III and IV; Put the female crayfish without eggs and male crayfish into the temporary breeding pool for pairing again, put the egg-bearing crayfish into the breeding pool for hatching according to the classification, and the number of crayfish in each pool is within 300; Spray 1 part of anti-stress agent after putting the egg-bearing crayfish into the breeding pool, and hatch for about 30-40 days, and collect the crayfish larvae on the collection net every day, and when a large number of crayfish larvae are hatched, empty the egg-bearing crayfish and collect all the crayfish larvae; Step 8, feed the bait: the bait is 25% clam meat, 15% pumpkin, 5% oatmeal, 5% soybean and 50% fermented feed, and the clam meat is fed for 1 day and stopped for 1 day; Add feed additives, 2% speed supplement 100, 2% devi le full-time feed, 2% by water, and 2% pio acid feed for 7 days and stop for 7 days. The initial feeding amount during temporary cultivation is 2% of the body weight of the shrimps. According to the feeding condition, the feeding amount is gradually increased by 1% to 8% of the body weight of the shrimps per day, and the shrimps are fed three times a day. The feeding amount during the hatching period of the egg-carrying shrimps is 4-5% of the body weight of the shrimps, and the shrimps are fed once in the evening.

[0047] Step 9: Water quality control: long-term spraying of activated Bacillus subtilis, spraying at 9:00 am every day; long-term spraying of extended lactic acid bacteria, spraying before feeding in the evening every day, and filtering through the filtering system.

[0048] In further embodiments, the red claw crayfish to be used as parents needs to meet the following conditions: Shrimp age: 8-9 months; Body weight specification: 50-65 g for female shrimps and 60-75 g for male shrimps.

[0049] Physical activity: crawling around, turning over and crawling on its own within a predetermined time after turning over; Appearance: four limbs are intact and the shape is standard; the shrimp shell surface is smooth and hard, there are no attached materials such as ciliates, filamentous algae, black-brown or gray-white spots and other diseases on the body surface and abdomen; the tail is complete without water bubbles and ulcers; 1 portion of nitrifying bacteria culture medium includes 20 g of tryptone, 38.2 g of ammonium chloride, 71.4 g of sodium bicarbonate, and 18.85 g of disodium hydrogen phosphate; 4 bottles of Kedi nitrifying bacteria and 4 bottles of Kedi bacteria feed; the ammonia nitrogen and nitrite are detected every day, and after all are reduced to 0, 1 portion of culture medium is added per ton of water body for cultivation; 1 portion of anti-stress agent includes 12 g of vitamin C and 2 g of Baijiling; When controlling the water temperature, the water body in the heat preservation water tank is heated by an air source heat pump or a solar heating system. The heated water body circulates through the hot water outlet pipe, the hot water inlet pipe and the heating coil to complete the heat exchange of the breeding water body in the heating pool. The air source heat pump or the solar heating system can be selected according to the actual situation.

[0050] When the filtering system is working, the breeding water body enters the microfilter through the filtering inlet pipe to filter the particulate impurities, then passes through the filtering cotton for secondary filtration, and finally passes through the ceramic filter material for tertiary filtration. Through three-stage filtration and manual suction, the breeding water body is filtered. The filtered water body can be discharged into the heating pool through overflow or designed pipeline, and then discharged into the corresponding breeding pool through the water supply pipe after heat exchange. When overflowing, the overflow port is designed at the ceramic filter material area of the re-filtering pool, and the overflow port is connected with the heating pool. When designing the pipeline, the ceramic filter material area is directly connected with the heating pool, and a valve is designed on the pipeline. When the water supplement system is working, water supplement to the heating pool is completed through the water supplement main pipe, and the heat preservation water tank can be supplemented with water at the same time; When the aeration system is working, pure oxygen is provided to the pure oxygen disc through the pure oxygen pipe, and the pure oxygen is discharged into the breeding pool or the temporary breeding pool through the pure oxygen pipe. Air is provided to the aeration disc through the aeration pipe, and the temporary breeding pool or the breeding pool is aerated by the aeration disc; When the drainage system is working, the water to be drained is discharged through the total drainage pipe.

[0051] Control group 1: Cement pools were used as experimental equipment, all conditions were completely consistent with the layer equipment, 900 juvenile shrimps were put into each 20m2 cement pool, that is, 4 cement pools were used as a group for pairing. After artificial pairing for 30 days, the egg-carrying shrimps were classified, and the I and II stages were put into different cement pools for further incubation, and the III and IV stages were put into incubation baskets for incubation, and 1mm mesh boxes were used to collect the hatched shrimps.

[0052] Control group 2: Soil pond greenhouses were used as experimental equipment, 4000 juvenile shrimps were put into a 200m2 soil pond greenhouse according to the male to female ratio of 3:1 for natural pairing and yield. After the natural water temperature reached above 27℃ for 30 days, the water was drained and the adult shrimps were artificially captured, and the egg-carrying shrimps were incubated in the same way, and the shrimps were collected.

[0053] Working principle: When the filtration system is working, the breeding water in the breeding pool enters the microfilter through the filter inlet pipe to filter out particulate impurities, then passes through the filter cotton for secondary filtration, and finally passes through the ceramic filter material for tertiary filtration. Through three-stage filtration and manual sewage suction, the breeding water is filtered, and the filtered water is discharged into the heating pool for temperature control; When the water temperature is controlled, the air source heat pump or solar heating system is used to heat the water in the heat preservation water tank. The heated water circulates through the hot water outlet pipe, the hot water inlet pipe and the heating coil to complete the heat exchange of the breeding water in the heating pool. Through the water supply pipe, the filtered water is discharged into the corresponding breeding pool to complete the temperature control work of the filter box; When the water supplement system is working, water supplement to the heating pool is completed through the water supplement main pipe, and the heat preservation water tank can be supplemented with water at the same time; When the aeration system is working, pure oxygen is provided to the pure oxygen disc through the pure oxygen pipe, and the pure oxygen is discharged into the breeding pool or the temporary breeding pool through the pure oxygen pipe. Air is provided to the aeration disc through the aeration pipe, and the temporary breeding pool or the breeding pool is aerated by the aeration disc; When the drainage system is working, the water to be drained is discharged through the total drainage pipe.

[0054] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the specific details in the above-described embodiments, and various equivalent transformations can be made to the technical solutions of the present application within the technical concept of the present application, and these equivalent transformations all belong to the protection scope of the present application.

Claims

1. A factory-based rack-type breeding system suitable for freshwater crayfish, characterized in that: include: The breeding tank body includes multiple breeding modules, and each breeding module has a multi-layer structure, wherein the multi-layer structure includes a single-layer regulating tank and a multi-layer breeding tank; a filtration system comprising a filtration assembly disposed in the regulating tank and in communication with the breeding tank; A water supply system includes a water supply main pipe connected to the regulating tank, the water supply main pipe is connected to an external water source, and a water supply pump is provided on the water supply main pipe; an aeration system comprising an aeration plate and a pure oxygen plate laid in the breeding pond; A drainage system, including a main drainage pipe connected to the breeding module, the main drainage pipe is connected to the regulating tank and the breeding tank, and is externally connected to a drainage ground; A second-layer platform is provided on the side of the breeding pool and has a predetermined height; A temperature control system comprising a heat preservation water tank and a circulation pipe connected to the heat preservation water tank and arranged in the regulating tank; The water supply system is connected to the regulating pool and the breeding pool.

2. The factory-based rack-type breeding system for freshwater crayfish according to claim 1, characterized in that: The regulating pool includes a filtering pool and a heating pool; The breeding pond includes a temporary holding pond located above the regulating pond, and a multi-layered seedling raising pond located above the temporary holding pond; The water supply system comprises a water supply pipe connected to the heating pool, and the water supply pipe is provided with a water supply branch pipe connected to each breeding pool.

3. The factory-based shelf-type breeding system for freshwater crayfish according to claim 1, characterized in that: Each temporary holding pool and seedling raising pool is provided with a filtering water inlet pipe which is communicated with the filtering pool.

4. The factory-based shelf-type breeding system for freshwater crayfish according to claim 1, characterized in that: The input end of the pure oxygen disk is connected to a pure oxygen pipe for external pure oxygen; The input of the aeration plate is connected to an aeration pipe of an external fan.

5. The factory-based shelf-type breeding system for freshwater crayfish according to claim 1, characterized in that: The filter assembly includes a microfilter connected to the filter water inlet pipe, and filter cotton and ceramic filter material arranged in the filter pool.

6. The factory-based rack-type breeding system for freshwater crayfish according to claim 1, characterized in that: The water supply main pipe is communicated with the heating pool.

7. The factory-based rack-type breeding system for freshwater crayfish according to claim 1, characterized in that: The aeration disk and the pure oxygen disk are arranged in the temporary holding pond and the seedling raising pond.

8. The factory-based rack-type breeding system for freshwater crayfish according to claim 1, characterized in that: The thermal insulation water tank is provided with a mechanical water supply valve connected to the water supply main pipe; The circulation pipeline includes a hot water inlet pipe and a hot water outlet pipe connected to the insulated water tank, and a heating coil connected to the hot water inlet pipe and the hot water outlet pipe and located in the heating pool; the heating coil is a stainless steel finned tube.

9. A factory-based rack-type breeding method for freshwater crayfish, implemented based on the system according to any one of claims 1 to 8, characterized in that: include: Step 1: Cultivate nitrifying bacteria: Cultivate nitrifying bacteria three weeks in advance. Use 340 catties of ceramic filter media for each breeding module. Bag all the ceramic filter media and place them in the culture pool. Add 1 part of nitrifying bacteria culture medium per ton of water. Cultivate for 20 days under light-shielding, aeration, and constant temperature of 25°C before using the ceramic filter media. Step 2: After cleaning and disinfecting the breeding system, place 6 PVC shrimp nests in each breeding pond, add ceramic filter material, add water circulation, and control the water temperature at 21°C; Step 3: Select red claw crayfish to be used as breeding shrimp; Step 4: Place the selected seed shrimps into the disinfection tank for 15 minutes and then place them into the corresponding breeding ponds. The ratio of breeding ponds for male shrimps to breeding ponds for female shrimps is 1:

3. 300 broodstock shrimps were placed in each pond. After the broodstock shrimps were placed in the pond, 1 portion of anti-stress agent was sprayed in the pond for 3 consecutive days. Step 5: Temporarily raise the temperature for 3 days, raising it by 0.5°C in the morning and evening, and using the temperature control system to raise the temperature to 23°C and maintain it; Step 6: One week before pairing, raise the temperature by 0.5℃ in the morning and evening each day, and raise the temperature to 27℃ through the temperature control system. After the water temperature reaches 27℃, pair the shrimps at a male-female ratio of 3:

1. The shrimps are grouped together in the same layer of the breeding pond. After pairing, spray one portion of anti-stress agent for three consecutive days. Step 7: After 30 days of artificial pairing, the shrimps are screened and transferred in sequence, male shrimps are picked out separately, the abdomens of female shrimps are inspected, and female shrimps without eggs are picked out separately; Egg-bearing shrimps are classified and screened according to stage I, II, III and IV; Female shrimp without eggs are placed in temporary holding ponds and paired with male shrimp again. Shrimp with eggs are placed in nursery ponds for hatching according to their classification, with no more than 300 shrimp in each pond. After the shrimps with eggs are placed in the nursery pond, 1 portion of anti-stress agent is sprayed on them. After about 30-40 days of incubation, the shrimps with eggs at different stages will gradually emerge. The shrimp fry on the collection net are collected every day. When a large number of fry emerge, the shrimps with eggs are cleared out and all the shrimp fry are collected. Step 8, feeding: feeding the bait is 25% clam meat, 15% pumpkin, 5% oats, 5% soybeans, and 50% fermented feed, wherein the clam meat is fed for 1 day and rested for 1 day; Mix feed additives, feed 2% Subu 100 and Dewei Le throughout the whole process, mix with 2% Baishuian and Biosaccharin for 7 days and stop for 7 days; The initial feeding amount for the shrimp is 2% of their body weight. Based on their feeding habits, the amount can be gradually increased by 1% to 8% of their body weight, with the standard being that they have finished eating within 1 hour. Feed them 3 times a day. During the hatching period, the feeding amount for brooding shrimp is 4-5% of the shrimp's body weight, and they are fed once in the evening. Step 9, water quality control: long-term spraying of activated Bacillus subtilis, spraying at 9:00 am every day; long-term spraying of cultured lactic acid bacteria, spraying before feeding every evening, and filtering through the filtration system.

10. The factory-scale rack-type breeding system for freshwater crayfish according to claim 9, characterized in that: The red claw crayfish used as the parent should meet the following requirements: Shrimp age: 8-9 months; Weight specifications: female shrimp specifications are 50-65g, and male shrimp specifications are 60-75g. Physical activity: crawling around, and turning over and crawling on their own within a predetermined time after falling over; Appearance: The limbs are healthy and of standard shape; the shrimp shell surface is smooth and hard, there are no attachments on the body surface and abdomen, and there is no disease; the tail is intact without blisters or ulcers.

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