Fish and shellfish farming system
The fish and shellfish farming system addresses residue clogging by using mesh filters and a unidirectional water flow to efficiently filter and separate residues, enhancing water quality and enabling nutrient recycling.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- HANERU KATSURAO CO LTD
- Filing Date
- 2024-11-12
- Publication Date
- 2026-05-22
AI Technical Summary
Existing fishery cultivation systems face issues with residues such as uneaten feed, excrement, and carcasses clogging gills and generating ammonia, leading to suffocation and inefficient residue precipitation.
A fish and shellfish farming system equipped with a water tank, filtration unit, and purification unit, utilizing mesh filters of varying sizes to create a unidirectional water flow for efficient residue filtration and separation, along with a barrier material to prevent stagnation.
The system effectively filters residues, prevents stagnation, and allows for the reuse and disposal of filtered materials, improving water quality and soil health through nutrient recycling.
Smart Images
Figure 2026085062000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a fishery cultivation system that efficiently filters residues.
Background Art
[0002] When cultivating fishery products, residues such as uneaten feed, excrement, bacteria attached to filter media, or carcasses of breeding organisms (hereinafter referred to as residues, etc.) in the cultivation pond generate organic substances, clog the gills of the breeding organisms, causing suffocation death, or the organic substances are decomposed to generate ammonia. The treatment of residues, etc. has become an issue.
[0003] Patent Document 1 discloses that in an aquarium, residues are circulated together with a water flow whose circulation direction is determined by a partition wall, and residues, etc. are intercepted by a blocking net disposed in a first fish cultivation tank, precipitated in a precipitation tray, and drained to a sewer.
Prior Art Documents
Patent Documents
[0004]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0005] Although the water flow circulates in the aquarium, the blocking net arranged in the path becomes an obstacle, and residues, etc. cannot circulate through the water channel and stay. As a result, there is a problem that the residues, etc. cannot be efficiently precipitated in the aquarium.
Means for Solving the Problems
[0006] In view of such circumstances, the present invention is made, and an object thereof is to provide a fishery cultivation system including a physical filtration unit for residues, etc.
[0007] To achieve the above object, a first aspect of the present invention is, A fish and shellfish farming system, Equipped with a water tank, a filtration unit, and a purification unit, A water flow is formed in the tank. The filtration unit provided in the aforementioned water tank comprises 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.
[0008] (Effects and Benefits) According to the first invention described above, by providing a mesh inside the water tank, the water flow generated inside the tank flows from upstream to downstream, making it possible to filter out residues and other debris generated inside the tank. Furthermore, the meshes can trap the residues and other debris between themselves.
[0009] Furthermore, the aquarium has a rectangular shape when viewed from above, with semicircles added to both ends of the rectangle, the semicircles having a diameter equal to the length of the shorter side of the rectangle. A barrier material that blocks the water flow, with a length approximately the same as the rectangle, may be positioned in the center between the two longer sides of the rectangle, and the drain outlet may be located on the semicircular arc side of the filtration unit.
[0010] (Effects and Benefits) According to the above embodiment, by providing a barrier material, the water in the tank can flow in one direction without stagnating, and the water can be efficiently filtered by the mesh.
[0011] Furthermore, the filtration unit may further include a third mesh-like filter media, wherein the mesh size of the second mesh-like filter media is larger than the mesh size of the third mesh-like filter media, and the third mesh-like filter media is installed downstream of the second mesh-like filter media in the water flow.
[0012] (Effects and Benefits) According to the above aspect, by providing a mesh in the water tank, the water flow generated in the water tank flows from upstream to downstream, making it possible to scoop up residues and the like generated in the water tank. Furthermore, it becomes possible to sandwich residues and the like between the meshes.
[0013] Also, in the water tank, it may be configured as a water supply pipe that supplies water from above the water surface into the water underwater.
[0014] (Function and effect) According to the above aspect, it is possible to continuously generate a water flow in one direction in the water tank and also to flow in the opposite direction.
[0015] Also, it may be a method for culturing fish and shellfish, including a filtration step of separating at least one selected from the group consisting of feed, feces, and carcasses of cultured organisms contained in the water flow using a fish and shellfish culture system, and a nitrification step of nitrifying ammonia contained in the water obtained through the filtration step.
[0016] (Function and effect) According to the above aspect, by filtering only the designated residues, it is possible to efficiently sort and reuse and discard them.
[0017] Also, it may be a method for culturing fish and shellfish, further including a larva rearing step in which larvae are reared in a partial area between the barrier material and one of the long sides.
[0018] (Function and effect) According to the above aspect, it is possible to distinguish between larvae and adults so that the larvae are not cannibalized by the adults.
[0019] Also, the culture method may be configured such that the feed includes food residues.
[0020] (Function and effect) By using food not only as a specific feed but also as feed, it becomes possible to efficiently consume food.
[0021] Furthermore, it may be configured to further include a drainage utilization step in which the drainage containing ammonia obtained through the filtration step is used as fertilizer for plant cultivation.
[0022] (Function and effect) According to the above aspect, it is possible to improve the physical properties of the soil for plants and maintain the health of the soil by using the drainage containing natural components such as the organic matter of animals and plants, such as residues.
Brief description of the drawings
[0023] [Figure 1] It is a perspective view of the fish and shellfish farming system in the embodiment of the present invention. [Figure 2] It is a plan view of the fish and shellfish farming system. [Figure 3] It is a perspective view of the fish tank in the fish and shellfish farming system, showing the skeleton to make it easier to grasp the mesh. [Figure 4] It is a perspective view of the fish and shellfish farming system with a filter unit installed.
Embodiments for carrying out the invention
[0024] The fish and shellfish farming system 1 in the present invention will be described. As shown in FIGS. 1, 2, and 4, the fish and shellfish farming system 1 includes an aquarium 2, a filtration unit 3, and a purification unit 4, and is configured to cultivate organisms in the aquarium 2 and ensure a certain water quality. Note that the aquarium 2 on the semi-circular wall 22 side from the mesh 31 is used as a drainage tank, and the rectangular aquarium 2 is referred to as a cultivation tank.
[0025] The aquarium 2 has a rectangular side wall 21 in plan view (see FIG. 2), and a semi-circular semi-circular wall 22 with the length of the short side of the side wall 21 as the diameter is added to both ends of the side wall 21. The side wall 21 and the semi-circular wall 22 have a bottom surface and are open at the top. The aquarium 2 is filled with an aqueous solution for organisms to inhabit.
[0026] Furthermore, water supply pipes 24, 24 are provided in the tank 2, and by using the openable and closable valves on the water supply pipes 24 to supply water only to designated locations, an upstream and downstream current are created within the tank 2, generating a clockwise or counterclockwise water flow within the tank 2. Specifically, the outlets of the water supply pipes 24 are positioned so that they are below the water surface (in the water) of the aqueous solution filled in the tank 2, or so that they are at a certain height above the water surface. This makes it possible to adjust the water supply and water flow according to the rearing conditions of the organisms being cultivated. The "upstream" refers to the water flow near the outlet of the water supply pipe 24, and the "downstream" refers to the water flow at a certain distance from the outlet of the water supply pipe 24.
[0027] Figure 3 shows the aquarium 2 with its side walls 21 and semicircular walls 22 exposed. 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 positioned on the frame 23 towards the bottom of the aquarium 2.
[0028] The mesh 31 has a grid-like mesh size, and the mesh 31 is suspended from the frame 23 by wrapping a rope around it and inserting the rope through a hole made in the upper end of the mesh 31 that is approximately the diameter of the rope. The remaining ends of the mesh 31 are installed integrally within the semicircular wall 22, but the mesh 31 can be opened and closed from the semicircular wall 22, for example, by a wire fastener.
[0029] The mesh 31 consists of a first mesh-like filter material 31a, a second mesh-like filter material 31b, and a third mesh-like filter material 31c, arranged toward the semicircular wall 22. Each mesh is suspended integrally from the frame 23 by ropes, allowing for some slack within the tank 2.
[0030] The mesh size of the first mesh filter media 31a is larger than that of the second mesh filter media 31b, and the mesh size of the second mesh filter media 31b is larger than that of the third mesh filter media 31c. By providing differences in the mesh sizes of each mesh, when the aqueous solution flows from upstream to downstream due to the water flow generated in the tank 2, it is possible to filter out residues and other particles generated in the tank 2 using one of the meshes.
[0031] Furthermore, the aqueous solution is circulated by supplying it to the water tank 2 via a drain pipe 32 from a drain outlet at the bottom of the drainage tank, and through a purification unit 4 (see Figures 2 and 4) which includes a filter tank and a nitrification tank. As a result, there is no need to remove residues in the water tank 2, and it is sufficient to dispose of the residues that accumulate in each tank to a certain extent.
[0032] Furthermore, residues that are too large to pass through the first mesh filter material 31a but not through the mesh size of the second mesh filter material 31b are trapped between the first mesh filter material 31a and the second mesh filter material 31b. Similarly, residues that are too large to pass through the second mesh filter material 31a but not through the mesh size of the third mesh filter material 31c are trapped between the second mesh filter material 31b and the third mesh filter material 31c. The trapped residues can also be removed from above, and the first mesh filter material 31a and the second mesh filter material 31b on the semicircular wall 22 side can be removed as needed and drained through the drain pipe 32. The recovered residues can be used as sintered ash as a soil conditioner or reused as pelletized feed.
[0033] In the aquaculture tank, a barrier material 25, approximately the same length as a rectangle, is placed to block the water flow. The barrier material 25 is slightly smaller than the side wall 21, and by providing the barrier material 25, the breeding fluid in the tank 2 flows in one direction without water stagnation, and residues can be efficiently filtered by the mesh 31.
[0034] A feeder 26 is installed across the barrier material 25 and the side wall 21, and feed is dispensed from the feeder 26 into the tank 2 at set times. In addition, in the aquaculture method of the fish and shellfish farming system described above, it is also possible to use feed containing food residue from the feeder 26, making it possible to efficiently consume not only specific feeds but also food products.
[0035] Furthermore, by installing a wire of the same shape in a frame-like manner from the end of the side wall 21 upwards, and arranging a mesh downwards from the wire (not shown), splashback during water supply from the water supply pipe 24 can be prevented.
[0036] Furthermore, any number of filters 27, 27 are stretched from the barrier material 25 to the side wall 21, extending all the way to the bottom. The tank can be divided according to the rearing conditions of the organisms being cultivated. For example, in the cultivation tank, larvae and adults can be separated and kept in layers created by the filters 27. This prevents adults from cannibalizing larvae. In addition, mooring devices 28 are appropriately provided to prevent organisms from being swept away by the water currents generated in the tank 2.
[0037] The water flow allows the aqueous solution containing residues to flow along the side wall 21, preventing organisms larger than the mesh size from moving from the cultivation tank to the drainage tank. As a result, the organisms being cultivated do not pass through the filtration unit 3.
[0038] Furthermore, the semicircular wall 22 and the mesh 31 may be made elliptical in shape to facilitate the flow of water.
[0039] When the aqueous solution flows from upstream to downstream, residues and other particles come into contact with one mesh 31 of the tank 2. Even if they cannot be filtered out, they can be filtered out by coming into contact with the other mesh 31 of the tank 2. Furthermore, by providing a filter 27, it is possible to block the residues and other particles.
[0040] For example, the capacity of tank 2 is 18m³. 3A tank capable of storing approximately 0.08 m of breeding water. 3 When the water is circulated in the tank with a flow rate of 1 / min or more, the circulation system completes one cycle in approximately 3.4 hours, allowing for 7 cycles per day. By using this aquaculture system, a filtration process is included to separate at least one selected from a group consisting of feed, feces, and carcasses of farmed organisms contained in the water flow, and a nitrification process is included to nitrify the ammonia contained in the water obtained through the filtration process. This allows for efficient sorting, reuse, and disposal of only the specified residue by filtering it.
[0041] Furthermore, through a wastewater utilization process in which the wastewater containing ammonia obtained through the filtration process using filtration unit 3 is used as fertilizer for plant cultivation, it becomes possible to improve the physical properties of the soil and maintain soil health by using wastewater containing naturally derived components such as organic matter from plants and animals.
[0042] Furthermore, the types of organisms grown in this embodiment are not limited to specific fish and shellfish. Preferred fish and shellfish include shrimp, abalone, and turban shells. [Explanation of Symbols]
[0043] 1…Aquaculture systems for fish and shellfish, 2...Aquarium, 21...Side wall, 22...Semicircular wall, 23...Frame, 24...Water supply pipe, 25...Barrier material, 26...Feeder, 27...Filter, 28...Mooring device 3... Filtration unit, 31... Mesh, 32... Drain pipe, 4... Purification unit.
Claims
1. A fish and shellfish farming system, Equipped with a water tank, a filtration unit, and a purification unit, A water flow is formed in the tank. The filtration unit installed in the tank comprises 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. A fish and shellfish farming system characterized in that 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.
2. The tank has a rectangular side wall in a plan view, and semicircular walls with a diameter equal to the length of the shorter side of the side wall are added to both ends of the side wall. A barrier material that blocks the water flow, having approximately the same length as the rectangle, is positioned in the center between the two long sides of the rectangle. The aquaculture system according to claim 1, characterized in that the drain outlet is provided on the arc side of the semicircle from the filtration unit.
3. The filtration unit further comprises a third mesh-like filter material, The mesh size of the second mesh filter material is larger than the mesh size of the third mesh filter material. The aquaculture system according to claim 1, characterized in that the third mesh filter material is installed downstream of the water flow from the second mesh filter material.
4. The aquaculture system according to claim 1, characterized in that the tank is equipped with at least one selected from the group consisting of a water supply pipe for supplying water into the water and a water supply pipe for supplying water into the water from above the water surface.
5. A filtration step of separating at least one selected from the group consisting of feed, feces, and carcasses of reared organisms contained in the water flow, using the aquaculture system described in any one of claims 1 to 4, and A method for cultivating fish and shellfish, comprising a nitrification step for nitrifying the ammonia contained in the water obtained through the filtration step.
6. The method for cultivating fish and shellfish according to claim 5, further comprising a larval rearing step in which larvae are reared in a portion of the area between the barrier material and one of the longer sides.
7. The method for cultivating fish and shellfish according to claim 5, wherein the feed includes food residue.
8. The method for cultivating fish and shellfish according to claim 5, further comprising a wastewater utilization step in which the wastewater containing ammonia obtained through the filtration step is used as fertilizer for plant cultivation.