Breeding technology system for improving growth welfare of eels

Abstract

The invention relates to a breeding technology system for improving growth welfare of eels, which comprises an eel fry breeding device and an adult eel breeding device, and comprises the following steps: (1) controlling the growth water temperature at 20-25 DEG C; (2) at a breeding stage, feeding eel fries in an eel fry breeding device, and feeding disinfected blood worms for 50-70 days; (3) growth stage: transferring the selected eel fries meeting the specification into an adult eel culture device for feeding, feeding high-quality feed, and adding bacteria and algae into culture water; a bacillus series is put into the culture water in the morning, and photosynthetic bacteria and phosphorus-accumulating bacteria are put into the culture water in the afternoon; in summer, chlorella, diatom and spirulina are put into the culture water; in winter, chlorella, diatom and spirulina are put into the culture water. Through the breeding system, the eel growth environment can be effectively improved, and healthy and rapid growth of eels is promoted.

Description

Technical Field

[0001] The invention relates to a breeding technology system for improving the growth and welfare of eels. Background Art

[0002] Eel is rich in various nutrients, boasting benefits such as nourishing the blood, removing dampness, and combating tuberculosis. It is an excellent nutritional supplement for those suffering from chronic illness, weakness, anemia, and tuberculosis. Eel is a calcium-rich aquatic product, and regular consumption can increase blood calcium levels and strengthen the body. Eel liver, rich in vitamin A, is an excellent food for those with night blindness. Consequently, eel farming has become a significant aquaculture industry in coastal areas.

[0003] During eel farming, the eel's growth environment is crucial to its growth, such as the aquaculture water, aquaculture feed, and aquaculture temperature. Improving the eel's growth environment, improving its welfare, and promoting its rapid and healthy growth is a challenge that the eel farming industry needs to overcome. Summary of the Invention

[0004] The purpose of the present invention is to provide a breeding technology system for improving the growth welfare of eels. Through this breeding system, the growth environment of eels can be effectively improved, and the healthy and rapid growth of eels can be promoted.

[0005] The technical solution of the present invention is: a breeding technology system for improving the growth and welfare of eels, including an eel fry breeding device and an adult eel breeding device, comprising the following steps: (1) Control the water temperature for growth at 20-25°C; (2) During the nursery stage: the eel fry are raised in an eel fry breeding device and fed with disinfected bloodworms for 50 to 70 days; (3) Growth stage: The eel fry that meet the specifications after selection are transferred to the eel breeding device for breeding, and are fed with high-quality feed, and bacteria and algae are added to the breeding water; (3.1) Preparation of high-quality feed includes preparing dry powder feed with the following mass ratios: fish meal 70-74%, starch 22-26%, yeast powder 3-5%, multivitamins 0.6-0.9%, and minerals 0.3-0.6%. Water is then added to the dry powder feed at the feeding site with a water to dry powder ratio of 1.2-1.8, and 6-8% fish oil, 0.4-0.6% yeast, and 0.2-0.4% lactic acid bacteria or Bacillus are added and stirred until uniform. (3.2) In the morning, add 5-15 ppm of Bacillus series to the aquaculture water, and in the afternoon, add 10-20 ppm of photosynthetic bacteria and 5-10 ppm of phosphate-accumulating bacteria to the aquaculture water; (3.3) In summer, add 0.05~0.1kg / t of chlorella, 0.02~0.05kg / t of diatoms, and 0.02~0.05kg / t of spirulina to the aquaculture water; in winter, add 0.02~0.05kg / t of chlorella, 0.05~0.1kg / t of diatoms, and 0.02~0.05kg / t of spirulina to the aquaculture water.

[0006] Furthermore, the eel fry breeding device includes an eel fry intensive breeding pond provided with a heat preservation shed, the eel fry intensive breeding pond is connected to a first microfiltration device via a first drainage pipe, the liquid output end of the first microfiltration device is connected to a first return pipe via an MBBR biological treatment tank, the first return pipe is provided with a return pump and is connected to the eel fry intensive breeding pond, the filtrate output end of the first microfiltration device is connected to a sedimentation tank, and the supernatant water output end of the sedimentation tank is connected to a tail water treatment device.

[0007] Furthermore, the sediment in the sedimentation tank is sucked out and sent to the filter tank for filtration, and the filtered products in the filter tank are fermented and used to feed red worms; the bottom of the filter tank is provided with a lower mesh layer, a rice husk layer, a sawdust layer and an upper mesh layer from bottom to top, and the filtered water output end at the bottom of the filter tank is connected to the tail water treatment device.

[0008] Furthermore, in step (2), a red worm temporary rearing, cleaning and disinfecting device is used to disinfect the red worms. The red worm temporary rearing, cleaning and disinfecting device includes a red worm temporary rearing pool which is internally divided into a plurality of temporary rearing pools. An insulating greenhouse is provided on the outside of the red worm temporary rearing pool. A water inlet and a water outlet are provided at the front and rear ends of each temporary rearing pool, respectively. An aeration pipe A is also provided on the bottom surface of each temporary rearing pool. When the red worms are temporarily reared in the temporary rearing pool, a layer of mesh with mesh is covered on the surface of the red worms so that the cleaned red worms can crawl from the mesh to the surface of the mesh.

[0009] Furthermore, a plurality of temporary rearing pool channels are formed inside the temporary rearing pool of the red worms through a plurality of partitions. The aeration pipe A is embedded in the bottom of the temporary rearing pool of the red worms. The aeration pipe A has a plurality of aeration holes A, and the aeration holes A are exposed on the bottom surface of the temporary rearing pool of the red worms.

[0010] Furthermore, a disinfection pool is provided next to the temporary rearing pool for red worms. A plurality of aeration pipes B are embedded in the bottom of the disinfection pool. The aeration pipes B have a plurality of aeration holes B exposed on the bottom surface of the disinfection pool. The cleaned red worms are placed in the disinfection pool before feeding and disinfectant is added for disinfection.

[0011] Furthermore, the adult eel breeding device includes an adult eel intensive breeding pond provided with a heat preservation shed, the adult eel intensive breeding pond is connected to a second microfiltration device via a second drainage pipe, the liquid output end of the second microfiltration device is connected to a second return pipe via a second MBBR biological treatment tank, the second return pipe is provided with a return pump and is connected to the adult eel intensive breeding pond, the filtrate output end of the second microfiltration device is connected to a sedimentation tank, the adult eel intensive breeding pond is connected to a bacteria and algae cultivation device via a pipeline, and bacteria and algae are put into the adult eel intensive breeding pond through the bacteria and algae cultivation device.

[0012] Furthermore, the eels are regularly sorted by the sorting device, and the eels that meet the sale specifications are quickly sent to the hanging pool for hanging through the sorting and diversion device, and the eels that do not meet the sale specifications are quickly sent to the adult eel breeding device for continued breeding.

[0013] Furthermore, the sorting and diverting device includes a plurality of collecting and holding pools arranged side by side and corresponding to the output ports of the rotating device. A diverter tube is provided at the corresponding position of the collecting and holding pools. The plurality of diverter tubes are located above the rear side of the plurality of collecting and holding pools. A conveying pipe for outputting eels is provided at the lower rear end of each collecting and holding pool; a diverter input port is provided at the middle front end of the diverter tube, and a lifting basket is provided between each diverter tube and the corresponding collecting and holding pool. The top of the lifting basket is open and is convenient for receiving the eels output from the collecting and holding pool. A discharge port is provided at the rear end of the lifting basket. Each lifting basket is driven by a lifting mechanism to rise and fall vertically so that the lifting basket lifts the eels output from the collecting and holding pool upward to the height of the diverter tube. The eels in the lifting basket are output from the discharge port and enter the diverter tube through the diverter input port. The bottom of the diverter tube is connected to a diverter output pipe.

[0014] Furthermore, the hanging water pool includes several pool bodies arranged longitudinally side by side and a water supply pool, and is characterized in that an aeration pipe is provided on the bottom plate of each pool body, and an eel output pipe with one end passing through the pool body and installed with a first valve is buried in the bottom plate of one end of the pool body, and the other end of the eel output pipe is flush with or lower than the bottom surface of the pool body and is plugged with a pluggable vertical plug. A pump body is provided in the water supply pool, and the pump body is provided with a water supply branch pipe leading to each pool body through the water supply main pipe.

[0015] Compared with the prior art, the present invention has the following advantages: 1. This breeding system allows eels to be raised in water from the time they are placed in the pond to the time they are exported as adult eels. This effectively improves the eel's growth environment and promotes their healthy and rapid growth, thereby achieving the goal of not adding antibiotics and pesticides during the eel breeding process and ensuring that the eels meet green product standards.

[0016] 2. By setting up a temporary bloodworm rearing pool, the cleaning of the bloodworms can be completed more conveniently, reducing the labor intensity during the cleaning of the bloodworms. By feeding the bloodworms during the eel fry period, the eel fry can start eating quickly and promote their growth.

[0017] 3. After the eels are put into the adult fish breeding device, feeding them high-quality feed and using fungi can help the eels improve the balance of intestinal flora, promote the eels to digest and absorb substances in the feed, and further promote the growth of the eels.

[0018] 4. By introducing photosynthetic bacteria, polyphosphate bacteria, chlorella, diatoms, spirulina and other fungi into eel breeding ponds, the accumulation of ammonia, nitrogen, nitrite and other substances in the breeding water can be reduced or eliminated, the breeding water quality can be improved, and the quality of eels can be improved.

[0019] 5. By setting up a sorting and diversion device, the eels can be quickly diverted after sorting. There is no need to manually pick out the eels during the whole process, which reduces the stimulation of the eels during sorting and transportation and improves the sorting efficiency.

[0020] 6. The hanging pool facilitates the rapid delivery of eels into baskets for weighing when they are sold. The entire process does not require manual fishing, which reduces the stimulation to the eels when they are sold and alleviates the intensity of manual labor.

[0021] 7. This breeding technology system for improving the growth and welfare of eels can be used to transform and upgrade traditional eel breeding ponds, reducing the cost of transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of the eel breeding device of the present invention; Figure 2 The eel fry breeding device of the present invention; Figure 3 It is a filtering schematic diagram of the present invention; Figure 4 This is a top view of the red worm temporary rearing, cleaning and disinfecting device of the present invention; Figure 5 This is a cross-sectional view of the red worm temporary rearing, cleaning and disinfecting device of the present invention; Figure 6 It is a cross-sectional schematic diagram of the separation and diversion device of the present invention; Figure 7 This is a schematic diagram of the state in which the lifting basket of the present invention moves upward to the height where the diverter cylinder is located; Figure 8 This is a schematic diagram of the top view of the separation and diversion device of the present invention; Figure 9 For the present invention Figure 7 Schematic diagram of local structure; Figure 10 For the present invention Figure 8Schematic diagram of local structure; Figure 11 It is a schematic diagram of the cross-sectional structure of the diverter tube of the present invention; Figure 12 This is a rear view structural diagram of the lifting basket of the present invention. Figure 13 It is a schematic diagram of the overhead structure of the hanging water tank of the present invention; Figure 14 It is a schematic elevational cross-sectional view of a hanging water tank body of the present invention; Figure 15 It is a cross-sectional view of the overflow pipe and the pool body of the present invention. DETAILED DESCRIPTION

[0023] To make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0024] refer to Figures 1 to 15 A breeding technology system for improving the growth and welfare of eels, including an eel fry breeding device and an adult eel breeding device, includes the following steps: (1) Control the water temperature in the eel breeding pond to 20~25℃; (2) During the nursery stage: the eel fry are raised in an eel fry breeding device and fed with disinfected bloodworms for 50 to 70 days; for example, 60 days; (3) Growth stage: The eel fry that meet the specifications after selection are transferred to the eel breeding device for breeding, and are fed with high-quality feed, and bacteria and algae are added to the breeding water; (3.1) Preparation of high-quality feed includes preparing dry powder feed, wherein the mass ratio of the dry powder feed is: fish meal 70-74%, starch 22-26%, yeast powder 3-5%, multivitamins 0.6-0.9%, and minerals 0.3-0.6%. Water is then added to the dry powder feed at the feeding site, with the mass ratio of water to dry powder feed being 1.2-1.8, such as 1.5 or 1.6. 6-8% fish oil, 0.4-0.6% yeast, and 0.2-0.4% lactic acid bacteria or Bacillus are also added, and the mixture is stirred evenly to form a viscous consistency. The mixture is then fed to the eels, where the yeast and lactic acid bacteria or Bacillus help improve the balance of the eel's intestinal flora and promote the eels' digestion and absorption of the feed. (3.2) Every morning, add 5-15PPM of Bacillus series to the aquaculture water to promote eel digestion and absorption; every afternoon, add 10-20PPM of photosynthetic bacteria and 5-10PPM of phosphate-accumulating bacteria to the aquaculture water; (3.3) Based on the results of water quality testing, 0.05-0.1 kg / t of Chlorella, 0.02-0.05 kg / t of Diatoms, and 0.02-0.05 kg / t of Spirulina are added to the aquaculture water in summer; 0.02-0.05 kg / t of Chlorella, 0.05-0.1 kg / t of Diatoms, and 0.02-0.05 kg / t of Spirulina are added to the aquaculture water in winter. Bacteria and algae consume ammonia, nitrogen, and nitrite in the aquaculture ponds, improving the aquaculture water quality.

[0025] In one embodiment, the mass ratio of the dry powder feed may be: fish meal 71%, starch 24%, yeast powder 4%, multivitamins 0.6%, and minerals 0.4%; or the mass ratio of the dry powder feed may be: fish meal 73%, starch 23%, yeast powder 3%, multivitamins 0.7%, and minerals 0.3%; or the mass ratio of the dry powder feed may be: fish meal 73.5%, starch 22%, yeast powder 3.5%, multivitamins 0.6%, and minerals 0.4%.

[0026] The fish meal can be imported fish meal such as American fish meal or New Zealand fish meal; the fish oil can be deep-sea fish oil; the multivitamins include vitamin A, B vitamins, vitamin C, vitamin D, vitamin E, etc. The Bacillus series includes DE, Bacillus subtilis, etc.

[0027] For smaller eels, the mass of water and dry feed can be 1.8, and for larger eels, such as eels in the selling period, the mass of water and dry feed can be 1.2. In this embodiment, the eel fry breeding device includes an eel fry intensive breeding pond 10 provided with a heat preservation shed, the eel fry intensive breeding pond is connected to a first microfiltration device 12 via a first drainage pipe 11, the liquid output end of the first microfiltration device is connected to a first return pipe 14 via an MBBR biological treatment tank 13, the first return pipe is provided with a return pump 15 and is connected to the eel fry intensive breeding pond, the filtrate output end of the first microfiltration device is connected to a sedimentation tank 20, and the upper clear water output end of the sedimentation tank is connected to a tail water treatment device 40. The water discharged from the eel breeding pond is divided into two paths through a microfiltration machine: one path is 80%-90% filtered sewage, and the other path is 10%-20% sewage with filtered feces. The 80%-90% filtered sewage enters the MBBR biological treatment pool, degrades the ammonia nitrogen and nitrite in the sewage, and then returns to the eel breeding pond for recycling through the return pipe. The 10%-20% sewage with feces enters the sedimentation tank for sedimentation, and the supernatant water is sent to the tail water treatment device for treatment to remove phosphorus and nitrogen before being discharged. At the same time, 10%-20% of external water is added to the eel fry breeding pond through the water replenishment tank 80.

[0028] In this embodiment, the sediment in the sedimentation tank is sucked out and then filtered into a filter tank 30. The bottom of the filter tank is arranged from bottom to top with a lower mesh layer 31, a rice husk layer 32, a sawdust layer 33, and an upper mesh layer 34. The filtered water output at the bottom of the filter tank is connected to the tailwater treatment device. The rice husk and sawdust layers have thicknesses ranging from 8 to 15 cm and are replaced every 2-3 days. The filtered product in the filter tank is fermented and used to feed red worms. This not only consumes fecal waste generated by eel farming, but also feeds the red worms with the fermented product, achieving self-sufficiency in the red worms and reducing farming costs.

[0029] In this embodiment, the adult eel breeding device includes an adult eel intensive breeding pond 60 provided with a heat preservation shed, the adult eel intensive breeding pond is connected to a second microfiltration device 62 via a second drainage pipe 61, the liquid output end of the second microfiltration device is connected to a second return pipe 64 via a second MBBR biological treatment tank 63, the second return pipe is provided with a return pump 65 and is connected to the adult eel intensive breeding pond, the filtrate output end of the second microfiltration device is connected to the sedimentation tank 30, the upper clear water output end of the sedimentation tank is connected to the tail water treatment device 40, the adult eel intensive breeding pond is connected to the bacteria and algae cultivation device 70 via a pipeline, and bacteria and algae are put into the adult eel intensive breeding pond through the bacteria and algae cultivation device, thereby consuming ammonia, nitrogen, nitrite and other substances in the breeding water.

[0030] In this embodiment, the first microfiltration device and the second microfiltration device may include microfiltration machines disposed in a microfiltration tank.

[0031] In this embodiment, the eel's feces are filtered out within 3 hours of defecation, and in order to maintain the integrity of the feces, the water flow rate in the first drainage pipe and the second drainage pipe is within 0.5m / s.

[0032] In this embodiment, in step (2), a red worm temporary rearing, cleaning, and disinfecting device is used to disinfect the red worms. The device includes a red worm temporary rearing pool 1 internally divided into a plurality of temporary rearing pools 101. A heat-insulating greenhouse is provided outside the red worm temporary rearing pool to maintain the indoor temperature. A water inlet 102 and a water outlet 103 are provided at the front and rear ends of each temporary rearing pool, respectively. An aeration pipe A104 is also provided on the bottom surface of each temporary rearing pool. When the red worms are temporarily reared in the temporary rearing pool, a mesh 2 with mesh holes is covered on the surface of the mesh to allow the cleaned red worms to crawl through the mesh holes to the surface of the mesh.

[0033] During operation: the harvested bloodworms are first placed in a temporary holding pond of the bloodworm temporary holding pond, the water inlet in the temporary holding pond continuously inputs water, and the water outlet continuously discharges water to form flowing water, which can clean the bloodworms temporarily held therein, and at the same time, the aeration pipe A at the bottom of the temporary holding pond is opened for aeration to oxygenate the bloodworms. When the bloodworms are placed in the temporary holding pond, a layer of mesh cloth with mesh holes needs to be covered on the surface of the bloodworms. During the cleaning process, the bloodworms will crawl to the surface of the mesh cloth through the mesh holes; after a period of temporary holding and cleaning, the cleaned bloodworms are moved to another adjacent temporary holding pond to continue to repeat the same temporary holding and cleaning work. The process is repeated for about 2-3 temporary holding ponds to complete the cleaning of the bloodworms; after about 2-3 days of temporary holding, a batch of bloodworms are moved to a disinfection pool, disinfected by adding disinfectant, and then transported to the eel breeding pond for feeding.

[0034] In this embodiment, multiple temporary rearing pool channels are formed inside the red worm temporary rearing pool through multiple partitions 105, and the aeration pipe A is embedded in the bottom of the red worm temporary rearing pool. The aeration pipe A has multiple aeration holes A106, and the aeration holes A are exposed on the bottom surface of the red worm temporary rearing pool.

[0035] An aeration main pipe A107 is installed above each aeration pipe A. Each aeration pipe is connected to the aeration main pipe A via an aeration branch pipe A108. Each aeration branch pipe A is provided with an aeration valve A109, which can open and close the aeration pipe A. The aeration main pipe A is connected to an aeration device outside.

[0036] In this embodiment, a disinfection pool 3 is provided next to the temporary rearing pool for red worms. A plurality of aeration pipes B4 embedded in the bottom of the disinfection pool are provided at the bottom of the disinfection pool. The aeration pipes B have a plurality of aeration holes B401 exposed on the bottom surface of the disinfection pool. The cleaned red worms are placed in the disinfection pool before feeding and disinfected by adding disinfectant; the added disinfectant can be chlorine dioxide disinfectant, etc.

[0037] An aeration main pipe B5 is installed above each aeration pipe B. Each aeration pipe is connected to the aeration main pipe B via an aeration branch pipe B. Each aeration branch pipe B is provided with an aeration valve B6, which can open and close the aeration pipe B. The aeration main pipe B is externally connected to an aeration device.

[0038] The disinfection tank can be provided with a drain pipe to facilitate the discharge of disinfectant. A filter screen can be provided at the water inlet and outlet of the temporary holding pond to prevent the red worms from flowing out while only allowing water to pass through.

[0039] In this embodiment, eels are regularly sorted by a sorting device, which may be a dual-purpose eel size sorting device with authorization publication number CN222108955U. Eels that meet the saleable specifications are quickly sent to a hanging pond for hanging by a sorting diversion device, while eels that do not meet the saleable specifications are quickly sent to an adult eel culture device for continued culture.

[0040] In this embodiment, the sorting and diverting device includes a plurality of collecting and holding ponds C1 arranged side by side and corresponding to the output ports of the rotating device. Each collecting and holding pond 1 temporarily holds a type of eel after being sorted by specifications. The collecting and holding ponds are all provided with diverter cylinders corresponding to their positions, and the number of diverter cylinders corresponds to the number of collecting and holding ponds. The plurality of diverter cylinders are located above the rear side of the plurality of collecting and holding ponds, and the lower rear end of each collecting and holding pond is provided with a delivery pipe C3 for outputting eels; the front middle part of the diverter cylinder 2 is provided with a diversion input port C4, and a rectangular lifting basket C5 is provided between each diverter cylinder and the collecting and holding pond corresponding to its position. The top of the lifting basket is open and is convenient for receiving the eels output from the delivery pipe of the collecting and holding pond corresponding to its position. The rear end of the lifting basket is provided with a discharge port C6, and each lifting basket is driven by a lifting mechanism to move vertically. The lifting mechanism lifts the eels collected and output from the temporary holding pond 1 upward to the height of the diversion cylinder through the lifting basket, and the eels in the lifting basket are discharged from the discharge port and enter the diversion cylinder through the diversion input port. The bottom of the diversion cylinder is connected with a diversion output pipe C7, and the eels in the diversion cylinder are discharged through the diversion output pipe. Related transfer equipment is arranged below the diversion output pipe to facilitate the reception of the diversion output eels, and then transferred and output through the transfer equipment. The whole process does not require manual scooping of the eels, and the operation is simple and convenient, which effectively improves work efficiency.

[0041] In this embodiment, the inner bottom of the diversion tube is provided with two symmetrically spaced diversion grooves C8, each symmetrically distributed left and right. The diversion grooves 8 have an arc-shaped cross-section, and the centerline of the diversion inlet coincides with the axis of symmetry of the two diversion grooves. By providing two diversion grooves within the diversion tube, eels entering through the diversion inlet fall into both diversion grooves, achieving simple left-right diversion and preventing accumulation of all eels.

[0042] In this embodiment, each diversion trough is inclined, with a higher front end and a lower rear end. A vertically extending diversion outlet is formed at the rear end bottom of each diversion trough. The outlet is connected to a diversion outlet pipe, meaning each diversion tube is connected to two diversion outlet pipes. The inclined bottom of the diversion trough facilitates the eel's backward flow and passage through the outlet for delivery.

[0043] In this embodiment, two water inlet pipes C9 distributed on the left and right are connected to the top of the diversion cylinder. The two water inlet pipes correspond to the positions of the two diversion troughs respectively, and the two water inlet pipes are used to supply water to the two diversion troughs respectively.

[0044] In this embodiment, the lifting mechanism includes a pair of lifting guide rails C10 arranged on the front side of the diversion cylinder. The pair of lifting guide rails are symmetrically distributed on the left and right and are located on the rear side of the lifting basket. A lifting rope C11 is arranged between the pair of lifting guide rails. The upper end of the lifting rope is connected to the winch C12, and the lower end of the lifting rope is connected to the lifting basket 5. The lifting basket and the pair of lifting guide rails slide vertically. When the winch reels the lifting rope, the lifting rope pulls the lifting basket to move upward along the pair of lifting guide rails.

[0045] In this embodiment, the lifting guide rails have a groove-shaped cross-section, with the grooves of a pair of lifting guide rails facing each other. A pair of sliding wheels C13 are mounted on the left and right ends of the rear side of the lifting basket. Each pair of sliding wheels is arranged vertically and extends into the interior of the lifting guide rail on the same side and engages in rolling engagement with the lifting guide rail. When the lifting rope pulls the lifting basket upward, the sliding wheels roll along the lifting guide rail. The cooperation between the grooved lifting guide rail and the sliding wheels improves the smoothness of the lifting basket's ascent and descent.

[0046] In this embodiment, a lifting connecting rod C14 is fixed to the open top of the lifting basket. This connecting rod is located in the middle and rear portion of the lifting basket. A lifting ring C15 is provided on the top of the connecting rod, which is connected to the lower end of the lifting rope. Since the lifting guide rail is located at the rear of the lifting basket, connecting the lifting rope to the lifting connecting rod located in the middle and rear portion of the lifting basket facilitates better lifting.

[0047] In this embodiment, in order to facilitate the eels discharged from the discharge port to better pass through the diversion input port, a guide plate C16 is provided in the diversion input port along the front-to-back direction. The guide plate is inclined with the front end higher and the rear end lower, and vertical side panels C17 are fixed at both ends of the guide plate.

[0048] In this embodiment, a U-shaped vertical slot C18 is provided at the lower middle end of the rear side of the lifting basket. This slot is located at the lower edge of the discharge port. A discharge shielding plate C19, designed to shield the discharge port, is inserted into the slot. During the upward movement of the lifting basket, the shielding plate remains inserted into the slot, shielding the discharge port. When the lifting basket moves upward to a position where the discharge port aligns with the diversion inlet, the shielding plate can be manually withdrawn, opening the discharge port. The eels in the lifting basket are then discharged from the discharge port and flow along the guide plate into the diversion barrel.

[0049] In this embodiment, the bottom of the lifting basket is a mesh structure. When the eels and water in the temporary holding pond are collected and output to the lifting basket through the conveying pipe, the water is discharged through the bottom of the lifting basket. That is, the lifting basket only drives the eels to move upward, while the water is discharged, reducing the lifting weight.

[0050] In this embodiment, the bottom of the lifting basket is inclined with a higher front end and a lower rear end, so that the eels can move better toward the discharge port.

[0051] In this embodiment, the delivery pipe is a hose, and a control valve can be provided on the delivery pipe.

[0052] In this embodiment, a drainage trough 20 is further provided between the plurality of collecting and holding tanks and the plurality of diversion cylinders. The drainage trough extends in the left-right direction. The drainage trough C20 is located below the collecting and holding tanks and corresponds to the positions of the plurality of lifting baskets to facilitate receiving the water discharged from the lifting baskets 5.

[0053] Specific implementation process of the sorting and diversion device: In the initial state, the lifting basket C5 is located in the drainage trough C20, and the top opening of the lifting basket C5 is located below the conveying pipe C3 of the collecting and holding tank C1; multiple collecting and holding tanks C1 are connected to the eel size sorting equipment, and each collecting and holding tank C1 temporarily holds a type of eel after size sorting; when the eels in the collecting and holding tank C1 need to be diverted, the eels and water in the collecting and holding tank C1 are output to the lifting basket C5 through the conveying pipe C3, and the water passes through the bottom of the lifting basket C5 into the drainage trough C20; then the winch C12 reels the lifting rope C11, and the lifting rope C11 pulls the lifting basket C5 upward, and the lifting basket C5 drives the eels to move upward along a pair of lifting guide rails C10; when the discharge port C6 of the lifting basket C5 moves to connect with the front end of the guide plate C16 in the diversion input port C4, the winch C12 stops, and the discharge baffle C19 is manually pulled upward. The eels in the lifting basket 5 pass through the discharge port C6 and enter the separation groove C8 of the diversion cylinder C2 along the guide plate C16, and are then discharged along the diversion output pipe C7.

[0054] In this embodiment, the water-hanging pond includes a plurality of pond bodies D10 arranged vertically side by side on the ground, and a water supply pond D20. Aeration pipes D30 are provided on the bottom plates of each of the pond bodies. An eel outlet pipe D40, one end of which extends through the pond body and is equipped with a first valve, is embedded in the bottom plate at one end of the pond body. The other end of the eel outlet pipe is flush with or below the bottom surface of the pond body and is plugged into a removable vertical plug-in pipe D50. A pump body D60 is disposed within the water supply pond, which is provided with water supply branch pipes D62 leading to each pond body via a water supply main D61. By embedding the eel outlet pipes, with their water inlet ends flush with or below the bottom surface of the pond body, in the bottom of the pond body, and using the removable vertical plug-in pipes, not only is it convenient to export the eels for sale, avoiding manual fishing, but it also prevents eels from entering the eel outlet pipes during the water-hanging process.

[0055] In this embodiment, in order to improve the aeration effect of the hanging water tank, a plurality of transversely arranged aeration pipes are buried at intervals along the longitudinal direction on the bottom plate of the tank body, and a plurality of aeration holes are arranged at intervals along the transverse direction on the aeration pipes.

[0056] In this embodiment, in order to supply oxygen to the aeration pipe, a gas supply main pipe D31 connected to the gas supply equipment is longitudinally arranged above the other end of the tank body. One end of the aeration pipe is closed, and the other end of the aeration pipe is connected to the gas supply main pipe via a vertical connecting pipe D32. A second valve is provided on the vertical connecting pipe to control the opening and closing of the aeration pipe.

[0057] In this embodiment, to prevent eels from entering the eel outlet pipe when the water level in the hanging tank is high and the eels need to be drained for sale, the vertical intubation tube is evenly distributed along the circumference with drainage holes D51 having a diameter of 0.5 cm to 1.5 cm. Therefore, when the water level is high, the first valve is opened, allowing water to enter the vertical drain pipe and then exit the eel outlet pipe through the drainage holes. When the water level drops below the lowest drainage hole, the vertical intubation tube is removed, and the water and eels are discharged through the eel outlet pipe.

[0058] In this embodiment, in order to control the on / off of the water supply main, a third valve is provided on the water supply main; and a fourth valve is provided on each water supply branch pipe so that each water supply branch pipe can control the on / off of water flow.

[0059] In this embodiment, the first valve, the third valve and the fourth valve are all butterfly valves. The first valve being a butterfly valve also facilitates the discharge of eels.

[0060] In this embodiment, to allow overflow when the water level inside the tank is high, overflow pipes D70 are vertically installed at the other end of each tank. The lower ends of these overflow pipes are connected to a main overflow pipe D71, which passes through the lower portion of the partition between adjacent tanks and the lower portion of the partition between the tank and the water supply tank, connecting to the water supply tank. Water overflowing from the tank is drained through the overflow pipes to the water supply tank for recycling.

[0061] In this embodiment, in order to prevent eels from entering the overflow pipe when water overflows, overflow holes D72 are distributed on the upper part of the overflow pipe, and the diameter of the overflow holes is 0.5 cm to 1.5 cm.

[0062] In this embodiment, in order to replenish water into the water supply tank, a water supply pipe D80 is provided on the upper side of the water supply tank. In order to increase the oxygen content in the water, an aeration pipe is provided at the bottom of the water supply tank.

[0063] In this embodiment, in order to improve the sunshade effect, a sunshade awning D90 is provided on the upper side of the several pool bodies and the water supply pool.

[0064] In this embodiment, the diameters of the eel outlet pipe and the overflow pipe are about 20 cm, and the diameter of the water supply branch pipe is about 15 cm.

[0065] In this embodiment, a platform D11 is provided on the side of the tank body and the water supply tank away from the eel outlet pipe for people to walk, etc. A drainage pipe is provided at one end of the water supply tank, and its specifications and structure are the same as those of the eel outlet pipe.

[0066] Usage: Eels are fed into tank D10 through the sorting and diversion device. Oxygen is supplied to tank D10 via aeration pipe D30, and water from the water supply tank D20 is supplied to tank D10 via pump D60, main water supply pipe D61, and branch water supply pipe D62. During the water supply process, a vertical intubation pipe D50 is inserted into one end of the eel outlet pipe D40, and the first valve is closed. Because the first valve is closed, any leaks between the vertical intubation pipe D50 and the eel outlet pipe D40 will not affect the system. After the water supply is completed, the branch water supply pipe D62 is closed, the first valve is opened, and the water in tank D10 is drained through drain hole D51. When the water level in tank D10 falls below the lowest drain hole D51, the vertical intubation pipe D50 is removed. A receiving basket or container is placed below the end of the eel outlet pipe D40 outside tank D10 to catch the eels. The water discharged from the tank D10 can be sent to the subsequent tailwater treatment device through a pipe. The eel output pipe can be used to weigh the eels within 30 seconds, reducing the stress response of the eels.

[0067] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, it does not require creative labor to design different forms of aquaculture technology systems that improve the growth and welfare of eels. Without departing from the principles and spirit of the present invention, all equal changes, modifications, substitutions and variations made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A breeding technology system for improving the growth and welfare of eels, comprising an eel fry breeding device and an adult eel breeding device, characterized in that: The following steps are involved: (1) Control the water temperature for growth at 20-25°C; (2) During the nursery stage: the eel fry are raised in an eel fry breeding device and fed with disinfected bloodworms for 50 to 70 days; (3) Growth stage: The eel fry that meet the specifications after selection are transferred to the eel breeding device for breeding, and are fed with high-quality feed, and bacteria and algae are added to the breeding water; (3.1) Preparation of high-quality feed includes preparing dry powder feed with the following mass ratios: fish meal 70-74%, starch 22-26%, yeast powder 3-5%, multivitamins 0.6-0.9%, and minerals 0.3-0.6%. Water is then added to the dry powder feed at the feeding site with a water to dry powder ratio of 1.2-1.8, and 6-8% fish oil, 0.4-0.6% yeast, and 0.2-0.4% lactic acid bacteria or Bacillus are added and stirred until uniform. (3.2) In the morning, add 5-15 ppm of Bacillus series to the aquaculture water, and in the afternoon, add 10-20 ppm of photosynthetic bacteria and 5-10 ppm of phosphate-accumulating bacteria to the aquaculture water; (3.3) In summer, add 0.05~0.1kg / t of chlorella, 0.02~0.05kg / t of diatoms, and 0.02~0.05kg / t of spirulina to the aquaculture water; in winter, add 0.02~0.05kg / t of chlorella, 0.05~0.1kg / t of diatoms, and 0.02~0.05kg / t of spirulina to the aquaculture water.

2. The aquaculture technology system for improving eel growth and welfare according to claim 1, characterized in that: The eel fry breeding device includes an eel fry intensive breeding pond provided with a heat preservation shed, the eel fry intensive breeding pond is connected to a first microfiltration device via a first drainage pipe, the liquid output end of the first microfiltration device is connected to a first return pipe via an MBBR biological treatment tank, the first return pipe is provided with a return pump and is connected to the eel fry intensive breeding pond, the filtrate output end of the first microfiltration device is connected to a sedimentation tank, and the supernatant water output end of the sedimentation tank is connected to a tail water treatment device.

3. The aquaculture technology system for improving eel growth and welfare according to claim 2, characterized in that: The sediment in the sedimentation tank is sucked out and sent to the filter tank for filtration, and the filtered products in the filter tank are fermented and used to feed red worms; the bottom of the filter tank is provided with a lower mesh layer, a rice husk layer, a sawdust layer and an upper mesh layer from bottom to top, and the filtered water output end at the bottom of the filter tank is connected to the tail water treatment device.

4. The aquaculture technology system for improving eel growth and welfare according to claim 1, 2 or 3, characterized in that: In the step (2), a red worm temporary rearing, cleaning and disinfecting device is used to disinfect the red worms. The red worm temporary rearing, cleaning and disinfecting device includes a red worm temporary rearing pool internally divided into a plurality of temporary rearing pools. A heat-insulating shed is provided outside the red worm temporary rearing pool. A water inlet and a water outlet are provided at the front and rear ends of each temporary rearing pool, respectively. An aeration pipe A is also provided on the bottom surface of each temporary rearing pool. When the red worms are temporarily reared in the temporary rearing pool, a layer of mesh with mesh is covered on the surface of the red worms so that the cleaned red worms can crawl from the mesh to the surface of the mesh.

5. The aquaculture technology system for improving eel growth and welfare according to claim 4, characterized in that: The interior of the red worm temporary rearing pool is formed with multiple partitions to form multiple temporary rearing pool channels. The aeration pipe A is embedded in the bottom of the red worm temporary rearing pool. The aeration pipe A is provided with multiple aeration holes A, and the aeration holes A are exposed on the bottom surface of the red worm temporary rearing pool.

6. The aquaculture technology system for improving eel growth and welfare according to claim 4, characterized in that: A disinfection pool is provided beside the temporary rearing pool for red worms. A plurality of aeration pipes B are embedded in the bottom of the disinfection pool. The aeration pipes B are provided with a plurality of aeration holes B exposed on the bottom surface of the disinfection pool. The cleaned red worms are placed in the disinfection pool before feeding and disinfected by adding disinfectant.

7. The aquaculture technology system for improving eel growth and welfare according to claim 1, 2, 3, 5 or 6, characterized in that: The adult eel breeding device includes an adult eel intensive breeding pond provided with a heat preservation shed, the adult eel intensive breeding pond is connected to a second microfiltration device via a second drainage pipe, the liquid output end of the second microfiltration device is connected to a second return pipe via a second MBBR biological treatment tank, the second return pipe is provided with a return pump and is connected to the adult eel intensive breeding pond, the filtrate output end of the second microfiltration device is connected to a sedimentation tank, the adult eel intensive breeding pond is connected to a bacteria and algae cultivation device via a pipeline, and bacteria and algae are put into the adult eel intensive breeding pond through the bacteria and algae cultivation device.

8. The aquaculture technology system for improving eel growth and welfare according to claim 1, 2, 3, 5 or 6, characterized in that: Eels are regularly sorted by sorting devices, and eels that meet the sales specifications are quickly sent to the hanging pool for hanging through the sorting and diversion devices, while eels that do not meet the sales specifications are quickly sent to the adult eel breeding device for continued breeding.

9. The aquaculture technology system for improving eel growth and welfare according to claim 8, characterized in that: The sorting and diverting device includes a plurality of collecting and holding pools arranged side by side and corresponding to the output ports of the rotating device. A diverter tube is correspondingly provided at the position of each collecting and holding pool. The plurality of diverter tubes are located above the rear side of the plurality of collecting and holding pools. A conveying pipe for outputting eels is provided at the lower rear end of each collecting and holding pool; a diverter input port is provided at the middle front end of the diverter tube, and a lifting basket is provided between each diverter tube and the corresponding collecting and holding pool. The top of the lifting basket is open and is conducive to receiving the eels output from the collecting and holding pool. A discharge port is provided at the rear end of the lifting basket. Each lifting basket is driven by a lifting mechanism to rise and fall vertically, so that the lifting basket lifts the eels output from the collecting and holding pool upward to the height where the diverter tube is located. The eels in the lifting basket are output from the discharge port and enter the diverter tube through the diverter input port. The bottom of the diverter tube is connected with a diverter output pipe.

10. The aquaculture technology system for improving eel growth and welfare according to claim 8, characterized in that: The hanging water pool includes several pool bodies arranged side by side longitudinally and a water supply pool, and is characterized in that an aeration pipe is provided on the bottom plate of each pool body, an eel output pipe with one end passing through the pool body and equipped with a first valve is buried on the bottom plate at one end of the pool body, the other end of the eel output pipe is flush with or lower than the bottom surface of the pool body and is plugged with a pluggable vertical plug-in pipe, a pump body is provided in the water supply pool, and the pump body is provided with a water supply branch pipe leading to each pool body through the water supply main pipe.

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