Soilless multi-layer circulating water culture device for sinonovacula constricta

Abstract

The utility model relates to a kind of soilless multiple layers of Sinonovacula constricta circulating water aquaculture device, including breeding barrel, multiple layers of three-dimensional aquaculture structure, circulating water system;Multiple layers of three-dimensional aquaculture structure include each other superimposed aquaculture tray, aquaculture tray includes upper and lower two layers of aperture plate, the aperture of two layers of aperture plate each other corresponds and is fixedly connected by Sinonovacula constricta nest pipe, and detachable stainless steel net is installed in bottom and upper portion;Each aperture plate is fixedly provided with multiple support rods, for supporting the aquaculture tray above to make the clearance between two layers of aquaculture tray;Multiple layers of three-dimensional aquaculture structure is arranged in breeding barrel;Breeding barrel inner wall lower portion has support component for supporting the lowermost aquaculture tray;The bottom of conical bottom breeding barrel is connected with water inlet pipe, top is equipped with overflow weir, and the water outlet of overflow weir is communicated with backwater pipe;Circulating water system includes bait biological culture pond, backwater pipe is communicated to bait biological culture pond;Bait biological culture pond is equipped with vertical-flow sedimentator for improving the concentration of bait, and vertical-flow sedimentator is connected with water inlet pipe by water pump.

Description

Technical Field

[0001] This utility model relates to a method for cultivating razor clams, specifically a soilless multi-layer recirculating aquaculture device and method for cultivating razor clams, belonging to the field of aquaculture technology. Background Technology

[0002] Current razor clam farming mainly relies on tidal flat or pond farming methods, which have the following problems:

[0003] 1. Low land utilization rate: It occupies a large amount of tidal flats or ponds, with a yield of only 5-10 kg / m² per unit area. 2 ;

[0004] 2. Highly affected by the environment: Production is unstable due to natural factors such as weather, tides, and water pollution;

[0005] 3. Frequent disease outbreaks: High-density farming leads to the rapid spread of pathogens, widespread drug abuse, and significant risks to product quality and safety;

[0006] 4. High labor intensity: Manual seeding, harvesting, and water quality management are tedious operations with high labor costs;

[0007] 5. Low feed utilization: Traditional feed cultivation easily leads to eutrophication of water bodies and low feed utilization.

[0008] Therefore, Chinese patent document CN116548292A, published on August 8, 2023, disclosed "a system and method for indoor intermediate cultivation of shellfish in tidal flats using the tailwater of Litopenaeus vannamei farming", which disclosed a three-dimensional recirculating aquaculture method for razor clams, but it still has shortcomings in terms of quality and efficiency. Utility Model Content

[0009] The purpose of this invention is to provide a soilless multi-layer recirculating aquaculture device and method for razor clams, which achieves all-weather, high-density, high-efficiency, and environmentally friendly razor clam farming through three-dimensional farming, a recirculating water system, and intelligent control.

[0010] The present invention adopts the following technical solution:

[0011] A soilless, multi-layered recirculating aquaculture system for razor clams includes a culture tank 1, a multi-layered three-dimensional culture structure, and a recirculating aquaculture system. The multi-layered three-dimensional culture structure includes stacked culture trays 11, each tray comprising upper and lower perforated plates with corresponding perforations connected by clam nest tubes 1101. The upper perforated plate is fixedly equipped with multiple support rods 1102 to support the upper culture tray 11, thus maintaining a gap between the two culture trays 11. The multi-layered three-dimensional culture structure is arranged within the culture tank... Inside the breeding tank 1; the inner wall of the breeding tank 1 has a support component 101 for supporting the lowest breeding tray 11; the bottom of the breeding tank 1 is connected to the water inlet pipe 2, and the top is provided with an overflow weir 10, the outlet of the overflow weir 10 is connected to the return water pipe 8; the circulating water system includes a feed organism cultivation tank 7, and the return water pipe 8 is connected to the feed organism cultivation tank 7 through a microfilter; the feed organism cultivation tank 7 is provided with a vertical flow sedimentation device 5 for increasing the feed concentration, and the vertical flow sedimentation device 5 is connected to the water inlet pipe 2 through a water pump 4.

[0012] Preferably, the four breeding tanks 1 are arranged in a group and in a row to facilitate the arrangement of the water inlet pipe 2 and the water return pipe 8.

[0013] Preferably, the bottom of the breeding tank 1 is conical.

[0014] Preferably, the feed organism cultivation tank 7 has a guide plate 6, the return water pipe 8 is connected to one side of the guide plate 6, and the vertical flow sedimentation tank 5 is located on the other side of the guide plate 6.

[0015] Preferably, the high-concentration feed solution stored at the bottom of the vertical flow sedimentation tank 5 is connected to the water inlet pipe 2 via the water pump 4.

[0016] Preferably, the water inlet pipe 2 extends into the breeding tank 1 and is connected to the bottom water distributor.

[0017] Preferably, the breeding tray 11 is made of PP material and has the same diameter as the inner diameter of the breeding bucket 1. Each breeding tray 11 is equipped with 3-4 support rods 1102 with a height of 20cm around it, which are used to load and unload the breeding tray and provide support for the upper breeding tray 1102.

[0018] Preferably, the breeding tray 11 is 10-12cm high, with breeding holes of 1.5-2cm in diameter evenly distributed inside the tray, and a stainless steel mesh with a mesh size of 0.1cm is fixed on the bottom surface of the tray.

[0019] Preferably, it also includes a microfilter, which is installed between the return water pipe 8 and the feed organism cultivation tank 7.

[0020] A method for using the above-mentioned soilless multi-layer recirculating aquaculture device for razor clams: At the beginning of the culture, a 2-3cm razor clam seedling is placed in each hole of the culture tray. After the culture tray 11 is filled with razor clam seedlings, a detachable stainless steel mesh with a mesh size of 0.1cm is placed on top of the culture tray 11 to prevent the razor clams from escaping. At the same time, another aeration tray is placed on top and connected to an aeration pipe installed along the tank wall; thus forming a multi-layer culture system with a culture tray and an aeration tray spaced 20cm apart. The culture tank is fed by a water distributor connected to a bottom water inlet pipe. The water enters from the bottom and gradually rises to the top. After the tank is full... The water overflows from the overflow weir inside the rearing tank 1 into the return water pipe 8; the inlet pipe 3 is connected to the vertical flow sedimentator in the feed organism cultivation tank. The biological feed rich in feed organisms and organic debris is transported to the rearing tank by a water pump. The water rises evenly through each rearing tray to meet the filter feeding needs of the razor clams. The water intake is adjusted according to the growth of the razor clams; the water from the rearing tank is collected in the return water pipe 3 and enters the microfiltration machine for treatment. The treated wastewater is returned to the feed organism cultivation tank 7, and the cycle continues; a water quality detector that can detect dissolved oxygen and temperature is installed inside the rearing tank to monitor the water quality.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1) This device has completely changed the way razor clams are farmed, greatly increased the farming density, achieved stable high yield and high efficiency and controllability, saved labor and improved quality; through the intelligent management and control system that controls flow rate, dissolved oxygen and other functions, it can achieve automatic operation.

[0023] 2) High yield and high efficiency: The yield per unit area can reach 80-120 kg / m2, which is 8-10 times higher than that of traditional breeding;

[0024] 3) Environmental protection and water conservation: The circulating water system reduces water consumption and wastewater discharge, meeting the requirements of green aquaculture;

[0025] 4) Quality controllable: The entire breeding process is monitored, which can prevent the overuse of antibiotics and ensure product quality and safety.

[0026] 5) Not limited by geographical location: It can be promoted in coastal or inland areas, expanding the aquaculture space;

[0027] 6) High degree of automation: reduces labor intensity. Attached Figure Description

[0028] Figure 1 This is a plan view of the soilless multi-layer recirculating aquaculture device for razor clams, which is a utility model.

[0029] Figure 2 This is a structural diagram of the interior of a single culture tank in the soilless multi-layer recirculating aquaculture device for razor clams, which is based on this utility model.

[0030] Figure 3 This is a top view of the breeding tray.

[0031] Figure 4 This is a schematic diagram of the structure of a razor clam nest tube.

[0032] Figure 5 This is a schematic diagram of a multi-layered, three-dimensional aquaculture structure.

[0033] Figure 6 This is a schematic diagram of the indoor installation of the soilless multi-layer recirculating aquaculture device for razor clams, as per this utility model.

[0034] In the diagram, 1. Culture tank, 2. Inlet pipe, 3. Outlet pipe, 4. Water pump, 5. Vertical flow sedimentator, 6. Baffle plate, 7. Feed organism cultivation pond, 8. Outlet pipe, 9. Air supply pipe, 10. Overflow weir, 11. Culture tray, 101. Supporting component, 1101. Razor clam nest tube, 1102. Support rod. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] See Figure 1-6 A soilless multi-layer recirculating aquaculture device for razor clams includes a culture tank 1, a multi-layer three-dimensional culture structure, and a recirculating water system.

[0037] See Figure 2-5 The multi-layer three-dimensional aquaculture structure includes superimposed aquaculture trays 11. Each aquaculture tray 11 includes upper and lower perforated plates. The holes of the two perforated plates correspond to each other and are fixedly connected by clam nest tubes 1101. The upper perforated plate is fixedly provided with multiple support rods 1102 to support the upper aquaculture tray 11, thereby maintaining a gap between the two aquaculture trays 11.

[0038] See Figure 2 The multi-layered three-dimensional aquaculture structure is disposed within the aquaculture tank 1; the inner wall of the aquaculture tank 1 has a support component 101 for supporting the lowest aquaculture tray 11; combined with Figure 1 The bottom of the breeding tank 1 is connected to the water inlet pipe 2, and the top is provided with an overflow weir 10. The outlet of the overflow weir 10 is connected to the return water pipe 8. The circulating water system includes a feed organism cultivation tank 7. The return water pipe 8 is connected to the feed organism cultivation tank 7 after passing through a microfilter. The feed organism cultivation tank 7 is provided with a vertical flow sedimentation device 5 for increasing the concentration of feed. The vertical flow sedimentation device 5 is connected to the water inlet pipe 2 through a water pump 4.

[0039] The device consists of a conical-bottomed upflow culture tank 1, a multi-layered porous culture tray 11 placed in the culture tank 1, an aerator and oxygenation device installed in the culture tank 1, a feed organism culture tank 7, an inlet pipe communicating with the vertical flow sedimentation device in the feed organism culture tank, a return water pipe communicating with the water outlet of the culture tank, a filtration device for treating the effluent, and a water quality detection and intelligent control system.

[0040] The conical bottom upflow aquaculture tank is 1.2-1.5m high. A support component 101 is welded around the inside of the tank from 20cm above the bottom for placing the first aquaculture tray. The aquaculture tray is made of PP material and has the same diameter as the inner diameter of the aquaculture tank. Each aquaculture tray is equipped with 3-4 stainless steel handles (i.e., support rods 1102) 20cm high around its perimeter for loading and unloading the aquaculture tray and providing support for the upper aquaculture tray.

[0041] The breeding tray is 10-12cm high, with breeding holes of 1.5-2cm in diameter evenly distributed inside. The bottom of the tray is equipped with a detachable stainless steel mesh with a mesh size of 0.1cm.

[0042] At the start of the breeding process, place a 2-3cm razor clam seedling in each hole of the breeding tray. After the breeding tray is filled with razor clam seedlings, cover the breeding tray with a detachable stainless steel mesh with a mesh size of 0.1cm to prevent the razor clams from escaping. At the same time, place an aeration tray on top, which is connected to the aeration pipe installed along the wall of the tank. Install the second breeding tray and aeration tray in the same way until the breeding tank is full, forming a multi-layer breeding system with a breeding tray and an aeration tray every 20cm. The rearing tanks use a water distributor connected to the bottom of the inlet pipe for water intake. Water enters from the bottom and gradually rises to the top. Once full, the water overflows through an overflow weir inside the tank and drains into the outlet pipe. The inlet pipe connects to a vertical flow sedimentation tank in the feed organism cultivation pond. A water pump delivers biological feed rich in feed organisms and organic debris to the rearing tanks. The rising water passes through each rearing tray, meeting the filter feeding needs of the razor clams. The water intake can be adjusted according to the growth of the razor clams. The effluent from the rearing tanks is collected in an outlet pipe and then treated by a microfiltration unit or other purification device. The treated wastewater returns to the feed organism cultivation pond, creating a continuous cycle. Water quality monitors, which can detect dissolved oxygen and temperature, are installed inside the rearing tanks to monitor water quality. A soilless multi-layer recirculating aquaculture system for razor clams typically consists of four or more rearing tanks, equipped with a water supply system with appropriate circulation capacity, and an intelligent control system that manages flow rate, dissolved oxygen, and other parameters to achieve automatic operation. This device has completely changed the way razor clams are farmed, significantly increasing the farming density, achieving stable, high-yield, and highly controllable production, saving labor, improving quality, and has significant guiding value.

[0043] The water quality detection and intelligent control system includes a water quality detector, a controller, and an execution device. The water quality detector is installed inside the aquaculture tank and is used to detect dissolved oxygen, temperature, pH value, and ammonia nitrogen content. The controller is connected to a water pump, an aeration fan, and a flow regulating valve.

[0044] The breeding tanks are made of 316 stainless steel or glass fiber reinforced plastic with smooth inner walls.

[0045] The breeding holes in the breeding tray are arranged in a circular pattern, with a diameter of 1.5-2.0 cm.

[0046] The aeration disc features multi-ring microporous aeration with a pore size of 20-50 μm, achieving an aeration uniformity of ≥95%.

[0047] A water flow disperser is installed at the inlet of the water inlet pipe. The water flow disperser has a truncated cone shape and spray holes with a diameter of 3-5 mm are evenly distributed on its surface.

[0048] Device assembly steps:

[0049] S1. Fix the conical bottom upflow aquaculture tank to the support on the floor of the aquaculture workshop to ensure vertical stability;

[0050] S2. Weld a fixed bracket 20cm from the bottom of the breeding tank. The bracket should be 5-8cm wide.

[0051] S3. Install the aeration pipe and connect it to the aeration disc. The aeration disc is fixed to the center of the breeding tray by a buckle.

[0052] S4. Connect the inlet and outlet water pipes, and install a water pump and flow regulating valve on the inlet water pipe;

[0053] S5. Install the water quality tester and controller, and connect them to the various execution devices.

[0054] In practice, follow these steps:

[0055] Seedling release: Select razor clam seedlings with a size of 2-3cm, soak them in 3-5% saline solution for 5-10 minutes, and then put them into the breeding holes, one clam per hole, with a stocking density of 800-1200 clams / m2.

[0056] Installation of breeding trays: After each breeding tray is placed, cover it with a detachable stainless steel mesh with a mesh size of 0.1cm. Then stack the breeding trays on the fixed bracket inside the breeding tank, with a spacing of 20cm between adjacent breeding trays.

[0057] Water circulation start-up: Start the water pump to deliver water rich in food organisms and organic debris, which has been concentrated by the vertical flow sedimentation device in the food organism cultivation tank, to the breeding tank at a flow rate of 0.5-1.5 m3 / h. The water enters from the bottom and rises gradually. After overflowing through the overflow weir, it flows back and is filtered by the microfilter before entering the food organism cultivation tank.

[0058] Oxygenation control: Turn on the aeration fan to maintain the dissolved oxygen in the aquaculture tank at 5-7 mg / L;

[0059] Water quality monitoring and control: The water quality parameters in the breeding tank are monitored in real time by a water quality tester. When the dissolved oxygen is below 5 mg / L, the aeration intensity is automatically increased; when the ammonia nitrogen content is above 0.5 mg / L, the water exchange rate is increased.

[0060] Feed replenishment: Regularly add single-celled algae, yeast powder and photosynthetic bacteria to the feed culture pond to maintain the feed organism density in the water at 300,000-500,000 organisms / mL;

[0061] Routine management: Inspect the breeding trays weekly and promptly remove dead shells and debris; rinse and disinfect the breeding tanks every 30 days.

[0062] Harvesting: When the razor clams reach 8-10cm in length, stop adding water, remove the culture trays layer by layer, rinse them, and then open the stainless steel mesh to harvest them.

[0063] This utility model has the following features:

[0064] 1. Multi-layered three-dimensional aquaculture structure:

[0065] - Adopting a conical upflow breeding tank, combined with a multi-layer porous breeding tray design, it realizes vertical space utilization and the breeding density can reach 800-1200 birds / m2, which is 8-10 times higher than the traditional model;

[0066] - The breeding trays feature a special aperture design that ensures the growth of the razor clams, prevents them from escaping, and facilitates the collection and cleaning of their excrement.

[0067] 2. Circulating water system:

[0068] - An innovative bottom-inlet, top-outlet water flow pattern ensures even distribution of feed and improves feeding efficiency;

[0069] 3. Intelligent control system:

[0070] - Real-time monitoring of water quality parameters (dissolved oxygen, temperature, pH, ammonia nitrogen, etc.) and automatic control of water flow, aeration and feed feeding;

[0071] - The remote monitoring function can be operated via mobile APP or computer, reducing manual management costs.

[0072] 4. Soilless aquaculture model:

[0073] - Abandoning the traditional muddy bottom, the breeding trays are used to fix the razor clams for growth, reducing bottom pollution and disease transmission;

[0074] - Combined with biological feed cultivation, it provides a higher quality and safer nutrient source, improving the quality and survival rate of razor clams.

[0075] Aquaculture Management Rules:

[0076] 1. Seedling selection and placement:

[0077] - Select razor clam seedlings with bright shell color, strong vitality, and no damage;

[0078] - After disinfecting by soaking in 3% saline solution for 10 minutes, place them into the breeding holes at a density of 1 per hole.

[0079] 2. Water quality control:

[0080] - Water temperature should be controlled between 20-28℃, with the optimal water temperature being 25℃;

[0081] Dissolved oxygen was maintained at 5-7 mg / L;

[0082] - The pH value is maintained between 7.5 and 8.5;

[0083] - Ammonia nitrogen content ≤ 0.5 mg / L

[0084] - Nitrite content ≤0.1mg / L.

[0085] 3. Feed Management:

[0086] - Repeat the feeding cycle 15-20 times daily, controlling the amount of single-celled algae (such as Chlorella and Chaetoceros) to 3-5% of the body weight of the razor clam;

[0087] - Regularly replenish the bait pond with nutrients such as yeast powder and photosynthetic bacteria to promote the reproduction of bait organisms;

[0088] - The circulation volume is automatically adjusted through an intelligent control system.

[0089] 4. Routine monitoring and maintenance:

[0090] - Record water quality parameters and feeding status daily;

[0091] -Inspect the breeding trays and aeration system weekly, and clean up debris and dead shells promptly;

[0092] - Backwash and disinfect the filter unit monthly;

[0093] - Conduct a comprehensive inspection and maintenance of the breeding tanks every quarter.

[0094] 5. Disease prevention and control:

[0095] - Regularly add probiotics to the feeding pond to enhance the razor clam's immunity;

[0096] -Isolate and treat infected shellfish promptly to prevent cross-infection;

[0097] - Disinfect the aquaculture system with chlorine dioxide every 30 days as a preventative measure.

[0098] Case Study:

[0099] This invention relates to a method for cultivating razor clams. The device is installed in a 100m² aquaculture workshop, with eight cultivation tanks, each 1.2m in diameter and 1.5m high, capable of holding 3-5 layers of cultivation trays. 80,000 2.5cm-sized razor clam seedlings are introduced. After a 6-month cultivation cycle, 6 tons of adult clams are harvested, achieving a yield of 60kg / m², five times higher than traditional pond cultivation. The water exchange rate throughout the cultivation process is less than 5%, ammonia nitrogen content remains below 0.3mg / L, the survival rate reaches 93%, and the products are uniform in size, with delicious meat, meeting green food standards.

[0100] The above are preferred embodiments of the present utility model. Those skilled in the art can make various changes or improvements based on this. Without departing from the overall concept of the present utility model, these changes or improvements should all fall within the scope of protection claimed by the present utility model.

Claims

1. A soilless multi-layer recirculating aquaculture system for razor clams, characterized in that: Includes aquaculture tank (1), multi-layer three-dimensional aquaculture structure, and recirculating water system; The multi-layer three-dimensional aquaculture structure includes an aquaculture tray (11), which includes two perforated plates, upper and lower, with the holes of the two perforated plates corresponding to each other and fixedly connected by clam nest tubes (1101); the upper perforated plate is fixedly provided with multiple support rods (1102) to support the upper aquaculture tray (11) so that a gap is maintained between the two aquaculture trays (11); the bottom and top of the aquaculture tray (11) are equipped with detachable stainless steel mesh. The multi-layer three-dimensional aquaculture structure is set inside the aquaculture tank (1); The inner wall of the breeding tank (1) has a support component (101) for supporting the lowest breeding tray (11). The bottom of the breeding tank (1) is connected to the water inlet pipe (2), and the top is provided with an overflow weir (10). The outlet of the overflow weir (10) is connected to the return water pipe (8). The circulating water system includes a food organism cultivation tank (7), and the return water pipe (8) is connected to the food organism cultivation tank (7). The bait culture pond (7) is equipped with a vertical flow sedimentation tank (5) for increasing the concentration of bait. The vertical flow sedimentation tank (5) is connected to the water inlet pipe (2) via a water pump (4).

2. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The four breeding tanks (1) are arranged in a group and in a row to facilitate the arrangement of the water inlet pipe (2) and the water return pipe (8).

3. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The bottom of the breeding tank (1) is conical.

4. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The feed organism cultivation pond (7) has a guide plate (6), the return water pipe (8) is connected to one side of the guide plate (6), and the vertical flow sedimentation tank (5) is located on the other side of the guide plate (6).

5. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The high-concentration feed solution stored at the bottom of the vertical flow sedimentation tank (5) is connected to the inlet pipe (2) through the water pump (4).

6. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The water inlet pipe (2) extends into the breeding tank (1) and is connected to the water distributor.

7. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The breeding tray (11) is made of PP material and has the same diameter as the inner diameter of the breeding bucket (1). Each breeding tray (11) is equipped with 3-4 support rods (1102) with a height of 20cm around it, which are used to load and unload the breeding tray and provide support for the upper breeding tray.

8. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: The breeding tray (11) is 10-12cm high, with breeding holes of 1.5-2cm in diameter evenly distributed inside the tray, and a detachable 0.1cm mesh stainless steel mesh installed on the bottom surface of the tray.

9. The soilless multi-layer recirculating aquaculture device for razor clams as described in claim 1, characterized in that: It also includes a microfilter, which is located between the return water pipe (8) and the feed organism cultivation tank (7).

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