Fish and shellfish farming system

Abstract

To provide a fish and shellfish farming system that efficiently filters residue. [Solution] A fish and shellfish farming system 1, The water tank 2, the filtration unit 3, and the purification unit 4 are provided. A water current is formed in this tank 2, The filtration unit 3 provided in the water tank 2 includes a first mesh filter material 31a and a second mesh filter material 31b. The mesh size of the first mesh filter material 31a is larger than the mesh size of the second mesh filter material 31b, The fish and shellfish farming system 1 is characterized in that the first mesh filter material 31a is installed on the upstream side of the water flow, and the second mesh filter material 31b is installed on the downstream side of the water flow.

Description

[Technical Field]

[0001] The present invention relates to a fish and shellfish farming system that efficiently filters debris. [Background technology]

[0002] When farming seafood, residues (hereinafter referred to as residues) such as leftover feed, excrement, bacteria attached to filter media, and the carcasses of captive organisms generate organic matter that clogs the gills of captive organisms, causing them to suffocate and die, and the organic matter decomposes to produce ammonia. Disposal of residues is therefore a major issue.

[0003] Patent Document 1 discloses that in an aquarium, residues are circulated along with a water flow whose circulation direction is determined by a partition wall, and the residues are intercepted by a blocking net installed in the first fish farming tank, settled in a settling basin, and then discharged into a sewer system. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2018-201489 Summary of the Invention [Problem to be solved by the invention]

[0005] Although the water circulates within the tank, the blocking net placed in the path acts as an obstacle, preventing the residue from circulating through the waterway and causing it to accumulate. This poses a problem in that the residue cannot be efficiently precipitated within the tank. [Means for solving the problem]

[0006] The present invention has been made in consideration of the above circumstances, and aims to provide a fish and shellfish farming system including a physical filtration unit for removing residue and the like.

[0007] In order to achieve the above object, the first aspect of the present invention is: 1. A fish and shellfish farming system comprising: Equipped with a water tank, a filtration unit, and a purification unit, A water current is formed in the tank, The filtration unit provided in the water tank includes a first mesh filter material and a second mesh filter material, The mesh size of the first mesh filter material is larger than the mesh size of the second mesh filter material, The first mesh filter material is placed on the upstream side of the water flow, and the second mesh filter material is placed on the downstream side of the water flow.

[0008] (Action and effect) According to the first aspect of the present invention, by providing a mesh in the tank, the water current generated in the tank flows from upstream to downstream, making it possible to strain out residues generated in the tank. Furthermore, the meshes can sandwich the residues.

[0009] The water tank has a rectangular shape in plan view, and semicircles with diameters equal to the length of the short side of the rectangle are added to both ends of the rectangle, A barrier material for blocking water flow having approximately the same length as the rectangle may be arranged in the center between the two long sides of the rectangle, and a drain outlet may be provided on the arc side of the semicircle from the filtration unit.

[0010] (Action and effect) According to the above aspect, by providing a barrier material, the culture liquid in the aquarium flows in one direction without stagnating in the aquarium, and can be efficiently filtered by the mesh.

[0011] The filtration unit may further include a third mesh filter material, the mesh size of the second mesh filter material being larger than the mesh size of the third mesh filter material, and the third mesh filter material being configured to be installed downstream of the second mesh filter material in the water flow.

[0012] (Action and effect) According to the above-mentioned embodiment, by providing a mesh in the water tank, the water current generated in the water tank flows from upstream to downstream, making it possible to strain out residues generated in the water tank.Furthermore, the mesh can sandwich the residues.

[0013] The tank may also be configured with a water supply pipe that supplies water from above the water surface into the water.

[0014] (Action and effect) According to the above aspect, it is possible to generate a continuous water flow in one direction in the water tank and also to cause the water to flow in the opposite direction.

[0015] The method may also be a method for cultivating fish and shellfish, which includes a filtration step using a fish and shellfish culturing system to separate at least one selected from the group consisting of feed, feces, and carcasses of raised organisms contained in the water flow, and a nitrification step to nitrify ammonia contained in the water obtained through the filtration step.

[0016] (Action and effect) According to the above aspect, by filtering only the specified residue, it is possible to efficiently sort, reuse, and dispose of the residue.

[0017] The method may also be a fish and shellfish farming method further comprising a larvae rearing step in which larvae are reared in a partial area between the barrier material and one of the long sides.

[0018] (Action and effect) According to the above embodiment, it is possible to separate the larvae from the adults, thereby preventing the larvae from being cannibalized by the adults.

[0019] The aquaculture method may also be configured such that the feed contains food waste.

[0020] (Action and effect) By using food as bait, as well as specific feed, it is possible to consume food efficiently.

[0021] The method may further include a wastewater utilization step in which the ammonia-containing wastewater obtained through the filtration step is utilized as fertilizer for plant cultivation.

[0022] (Action and effect) According to the above aspect, by using wastewater containing residues containing naturally occurring components such as organic matter from plants and animals, it is possible to improve the physical properties of the soil for plants and maintain the health of the soil. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a perspective view of a fish and shellfish farming system according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a plan view of the fish and shellfish farming system. [Figure 3] FIG. 10 is a perspective view showing a skeleton of the aquarium tank in the fish and shellfish farming system to make it easier to understand the mesh. [Figure 4] FIG. 2 is a perspective view of the fish and shellfish farming system with the filter unit installed. DETAILED DESCRIPTION OF THE INVENTION

[0024] The fish and shellfish farming system 1 of the present invention will now be described. As shown in Figures 1, 2, and 4, the fish and shellfish farming system 1 comprises an aquarium 2, a filtration unit 3, and a purification unit 4, and is used to cultivate organisms in the aquarium 2 and ensure a certain level of water quality. The aquarium 2 on the semicircular wall 22 side of the mesh 31 is referred to as a drainage tank, and the rectangular aquarium 2 is referred to as a farming tank.

[0025] The aquarium 2 has a rectangular side wall 21 in plan view (see FIG. 2), and semicircular walls 22, each with a diameter equal to the length of the short side of the side wall 21, added to both ends of the side wall 21. The side wall 21 and the semicircular wall 22 have bottoms and are open at the top. The aquarium 2 is filled with an aqueous solution for living organisms to live in.

[0026] Furthermore, water supply pipes 24, 24 are provided within the aquarium 2, and an openable valve on the water supply pipe 24 allows water to be supplied only to designated locations, thereby creating upstream and downstream flows within the aquarium 2 and generating clockwise or counterclockwise water currents within the aquarium 2. Specifically, the outlet of the water supply pipe 24 is positioned below (underwater) the water surface of the aqueous solution filled in the aquarium 2 so that it faces in one direction or is at a certain height above the water surface. This makes it possible to adjust the water supply and water flow according to the breeding conditions of the cultivated organisms. The "upstream" refers to the water flow near the outlet of the water supply pipe 24, and the "downstream" refers to the water flow a certain distance from the outlet of the water supply pipe 24.

[0027] 3 shows the skeleton of the side wall 21 and semicircular wall 22 of the aquarium 2. The filtration unit 3 includes a mesh 31 and a filter 27. A semicircular frame 23 is installed at the intersection of the side wall 21 and the semicircular wall 22, and the mesh 31 is attached to the frame 23 and attached to the bottom of the aquarium 2.

[0028] The mesh 31 has a lattice-like mesh size, and is hung from the frame 23 by wrapping a rope around the frame 23 and passing the rope through a hole drilled at the top end of the mesh 31 that is approximately the diameter of the rope. The remaining edge of the mesh 31 is installed integrally within the semicircular wall 22, but the mesh 31 can be opened and closed from the semicircular wall 22 using, for example, a zipper.

[0029] The mesh 31 is arranged such that a first mesh filter material 31a, a second mesh filter material 31b, and a third mesh filter material 31c are arranged toward the semicircular wall 22 side, and each mesh is hung integrally on the frame 23 by a rope so that it has slack in the water tank 2.

[0030] The mesh size of first mesh filter material 31a is larger than that of second mesh filter material 31b, which is larger than that of third mesh filter material 31c. By providing different mesh sizes for each mesh, when the aqueous solution flows from upstream to downstream due to the water current generated in water tank 2, it becomes possible to filter out residues generated in water tank 2 using one of the meshes.

[0031] Furthermore, the aqueous solution is circulated by being supplied from a drain outlet provided at the bottom of the drainage tank through a drain pipe 32 to a purification unit 4 (see Figures 2 and 4) which includes a filter filtration tank and a nitrification tank, and then to the aquarium 2. This eliminates the need to remove residues and the like within the aquarium 2, and only the residues accumulated to a certain extent in each tank can be discarded.

[0032] Residues and the like that pass through the first mesh filter material 31a but are too large to pass through the mesh size of the second mesh filter material 31b are sandwiched between the first mesh filter material 31a and the second mesh filter material 31b. Residues and the like that pass through the second mesh filter material 31a but are too large to pass through the mesh size of the third mesh filter material 31c are sandwiched between the second mesh filter material 31b and the third mesh filter material 31c. The sandwiched residues and the like can be removed from above by appropriately removing the first mesh filter material 31a and the second mesh filter material 31b on the semicircular wall 22 side and draining them through the drain pipe 32. The collected residues and the like can be sintered into ash and used as a soil conditioner, or recycled as pelleted feed.

[0033] In the aquaculture tank, a barrier material 25 having approximately the same length as the rectangle is placed to block the water flow. The barrier material 25 is slightly smaller than the side wall 21. By providing the barrier material 25, the culture liquid in the aquarium 2 flows in one direction without stagnating the water flow within the aquarium 2, and residues and the like can be efficiently filtered by the mesh 31.

[0034] A feeder 26 is installed between the barrier material 25 and the side wall 21, and feed is supplied from the feeder 26 to the aquarium 2 at a set time. In the aquaculture method of the above-mentioned fish and shellfish aquaculture system, it is also possible to use feed containing food residues from the feeder 26, making it possible to efficiently consume not only specific feed but also food.

[0035] Furthermore, by installing a wire of the same shape in a frame shape above the edge of the side wall 21 and arranging a mesh downward from the wire (not shown), it is possible to prevent water from splashing back when supplied from the water supply pipe 24.

[0036] Furthermore, any number of filters 27, 27 are hung on the barrier material 25 and the side wall 21 all the way to the bottom. The organisms can be separated according to their breeding conditions. For example, layers formed by the filters 27 in the aquaculture tank are used to separate larvae and adults, allowing them to live in separate layers. This prevents the adults from cannibalizing the larvae. Additionally, mooring devices 28 are provided as needed to prevent the organisms from being swept away by water currents generated in the tank 2.

[0037] The water flow allows the aqueous solution containing residues to flow along the side wall 21, and organisms larger than the mesh size cannot move from the culture tank to the wastewater tank. As a result, the cultured organisms do not pass through the filtration unit 3.

[0038] Furthermore, the semicircular wall 22 and the mesh 31 may be elliptical to smooth the flow of water.

[0039] When the aqueous solution flows from upstream to downstream, residues and the like come into contact with one mesh 31 of the water tank 2, and even if they cannot be filtered out, they can be filtered out by coming into contact with the other mesh 31 of the water tank 2. In this case, by providing a filter 27, it is possible to block the residues and the like.

[0040] For example, the capacity of tank 2 is 18m 3The tank can store about 0.08m of water. 3 When circulating water in the tank at a water flow rate of 1 / min or more, the circulation system goes around once in about 3.4 hours, and can be rotated seven times a day. By using this fish and shellfish farming system, it is possible to filter out only the specified residues by including a filtration process that separates at least one selected from the group consisting of feed, feces, and carcasses of reared organisms contained in the water flow, and a nitrification process that nitrifies the ammonia contained in the water obtained through the filtration process, making it possible to efficiently sort, reuse, or dispose of the residues.

[0041] Furthermore, in the wastewater utilization process, the ammonia-containing wastewater obtained through the filtration process using the filtration unit 3 is used as fertilizer for plant cultivation. The wastewater uses residues containing naturally occurring components such as organic matter from plants and animals, improving the physical properties of the soil for plants and maintaining soil health.

[0042] Furthermore, the type of organisms grown in this embodiment is not limited to a specific type of fish or shellfish, and preferred types of fish or shellfish include shrimp, abalone, and turban shells. [Explanation of symbols]

[0043] 1...Fish and shellfish farming systems, 2...aquarium, 21...side wall, 22...semicircular wall, 23...frame, 24...water supply pipe, 25...barrier material, 26...feeder, 27...filter, 28...tether, 3...filtration unit, 31...mesh, 32...drainage pipe, 4...Purification unit.

Claims

1. 1. A fish and shellfish farming system comprising: Equipped with a water tank, a filtration unit, and a purification unit, A water current is formed in the tank, The filtration unit provided in the aquarium includes a first mesh filter material and a second mesh filter material, The mesh size of the first mesh filter material is larger than the mesh size of the second mesh filter material, The first mesh filter material is installed on the upstream side of the water flow, and the second mesh filter material is installed on the downstream side of the water flow, The water tank has a rectangular side wall in a plan view, and semicircular walls each having a diameter equal to the length of the short side of the side wall, added to both ends of the side wall; A barrier material for blocking the water flow, having approximately the same length as the rectangle, is disposed in the center between the two long sides of the rectangle; A fish and shellfish farming system characterized in that a drain outlet is provided on the arc side of the semicircle from the filtration unit.

2. The filtration unit further includes a third mesh filter material, The mesh size of the second mesh filter material is larger than the mesh size of the third mesh filter material, 2. The fish and shellfish farming system according to claim 1, wherein the third mesh filter medium is installed downstream of the second mesh filter medium in the water flow.

3. 2. The fish and shellfish farming system according to claim 1, characterized in that the aquarium is provided with at least one selected from the group consisting of a water supply pipe that supplies water into the water and a water supply pipe that supplies water from above the water surface into the water.

4. A filtering process for separating at least one selected from the group consisting of feed, feces, and carcasses of reared organisms contained in the water flow using the fish and shellfish farming system according to any one of claims 1 to 3; and The method for cultivating fish and shellfish includes a nitrification step of nitrifying the ammonia contained in the water obtained through the filtration step.

5. A filtration process using the fish and shellfish farming system described in claim 2 to separate at least one selected from the group consisting of feed, feces, and carcasses of reared organisms contained in the water flow; a nitrification step of nitrifying the ammonia contained in the water obtained through the filtration step; and A method for cultivating fish and shellfish, comprising a larvae rearing step in which larvae are reared in a portion of the area between the barrier material and one of the long sides.

6. 5. The method of claim 4, wherein the feed comprises food waste.

7. 5. The method for cultivating fish and shellfish according to claim 4, further comprising a wastewater utilization step in which the ammonia-containing wastewater obtained through the filtration step is utilized as fertilizer for plant cultivation.

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