Biologically self-contained, multi-water integrated land-based aquaculture system

Abstract

Conventional land-based aquaculture requires physical and chemical water treatment equipment to remove organic matter and nutrients from the rearing water, which presents challenges in terms of energy consumption and wastewater treatment. [Solution] The present invention employs a configuration in which organic matter and nutrients in the rearing water are gradually ingested, decomposed, and fixed by a group of organisms consisting of microalgae, shellfish, benthic organisms, and seaweed in a land-based aquaculture and agriculture integrated system having multiple independent water systems. As a result, the end point of the processing process becomes the point of product collection, and continuous drainage to the outside is not required during steady operation. [Effects] This enables simplification of water treatment facilities, reduction of energy consumption, and simultaneous production of multiple products.

Description

Technical Field

[0001] The present invention relates to Regarding land-based aquaculture a recirculating water treatment system that has a plurality of independent water systems and that treats organic substances and nutrient salts in breeding water by organisms and converts them into products.

Background Art

[0002] In conventional onshore aquaculture systems, in order to remove organic substances and nutrient salts accumulated in breeding water, water treatment facilities such as physical filtration devices, biological filtration devices, nitrification devices, and denitrification devices have been used.

[0003] However, these facilities consume a large amount of energy, and the organic substances and nutrient salts to be treated are treated as discharges and not sufficiently reused in production.

[0004] On the other hand, although the concept of IMTA, that is, integrated multi-trophic aquaculture, is known, there is still room for study regarding a recirculating water treatment system that maintains water quality while stepwise utilizing organic substances and nutrient salts in breeding water by a biological community and converting them into products.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a recirculating water treatment system that uses organic substances and nutrient salts in breeding water not merely as objects to be removed but as raw materials for biological production, and that enables simultaneous achievement of water quality maintenance and production activities.

Means for Solving the Problems

[0006] The biological treatment complete multi-water system integrated onshore aquaculture system according to the present invention has a plurality of independent water systems, Each of the aforementioned multiple independent water systems includes a tank for raising fish or crustaceans, and the organic matter and nutrients contained in the water of the tank for raising fish or crustaceans are and adopts a configuration in which a biological community composed of microalgae, shellfish, benthic organisms, and seaweed stepwise ingests, decomposes, and fixes them.

[0007] This makes the end point of the biological treatment process the product recovery point, and realizes a circulating system that does not require continuous wastewater discharge to the outside during steady operation. [Effects of the Invention]

[0008] According to the present invention, organic matter and nutrients in the rearing water can be utilized stepwise by the organisms, enabling simultaneous maintenance of water quality and recovery of products.

[0009] Furthermore, by converting organic matter and nutrients into biological production, multiple products such as fish, crustaceans, shellfish, benthic organisms, and seaweed can be obtained. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram showing the circulatory structure of a self-contained biological treatment, multi-water integrated land-based aquaculture system. [Modes for carrying out the invention]

[0011] In one embodiment of the present invention, The water discharged from the fish or crustacean rearing tanks is filtered through a coarse drum filter to remove only large solid particles before being introduced into the microalgae cultivation area.

[0012] In the microalgae cultivation section, By utilizing the nutrients contained in the aquarium water To promote the growth of microalgae.

[0013] The cultured microalgae are supplied to a community of organisms consisting of mollusks, benthic organisms, and seaweed.

[0014] Shellfish filter suspended matter, benthic organisms decompose settled organic matter, and seaweed absorbs and fixes dissolved inorganic nutrients.

[0015] As a result, organic matter and nutrients in the rearing water are gradually absorbed, decomposed, and fixed by the organisms, thus maintaining water quality.

[0016] The water that has undergone the above treatment is circulated back to the breeding tank again and does not require continuous drainage to the outside during steady operation.

Explanation of symbols

[0017] 1 Fish breeding tank 2 Crustacean breeding tank 3 Circulating water flow path 4 Microalgae culture section for fish 5 Microalgae culture section for crustaceans 6 Biota treatment section for fish 7 Biota treatment section for crustaceans 8 Product recovery section for fish 9 Product recovery section for crustaceans 10 Shellfish 11 Benthic organisms 12 Seaweed 13 Coarse-mesh drum filter for fish 14 Coarse-mesh drum filter for crustaceans

Claims

1. A land-based aquaculture system having multiple independent water systems, Each of the aforementioned multiple independent water systems includes a tank for raising fish or crustaceans. The organic matter and nutrients contained in the rearing water of the aforementioned fish or crustacean rearing tank, Water quality is maintained by a group of organisms consisting of microalgae, shellfish, benthic organisms, and seaweeds that gradually ingest, decompose, and fix the material. The end point of the processing process by the organism in question is the point where the product is collected. A self-contained, multi-water integrated land-based aquaculture system with complete biological processing.

2. The system according to claim 1, characterized in that the group of organisms forms a multi-trophic aquaculture structure starting from microalgae.

3. The system according to claim 1 or 2, characterized in that the microalgae proliferate by utilizing nutrients contained in the rearing water.

4. The system according to claim 1 or 2, characterized in that the rearing water is introduced into the microalgae cultivation section after only large solid matter has been removed by a coarse drum filter.

5. The system according to claim 1 or 2, characterized in that continuous drainage to the outside is not required during steady-state operation.

6. The system according to claim 1, characterized in that the group of organisms consists of at least one organism, including primary production organisms and organisms that utilize them.

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