Alternating land-based cultivation of shrimp and seaweed

Abstract

To address the following issues in which: traditional land-based aquaculture cultivates a single species in a single tank, requiring stable water temperatures, with heating needed in winter; or if the water temperature becomes too high or too low and cannot be adjusted, aquaculture operations have to be paused.SOLUTION: In the present invention, shrimp are cultivated in the same aquaculture tank when water temperatures are high, while seaweed is cultivated when the water temperature drop. Consequently, aquaculture can be maintained throughout the year.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a method for cultivating shrimp and Porphyra seaweed in the same facility in land-based aquaculture. [Background technology]

[0002] In recent years, land-based aquaculture has involved cultivating a single variety of shrimp, seaweed, or fish in aquaculture tanks throughout the year. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2022-173162 [Patent Document 2] JP 2022-112117 A Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional land-based shrimp farming, shrimp are farmed in tanks all year round, and other types of creatures are not raised in the same tank. However, shrimp farming requires an appropriate water temperature, and it is difficult to raise shrimp at water temperatures below 20°C. For this reason, in order to keep the room and water temperatures constant during indoor farming, heaters such as oil heaters are used in the winter when the temperature drops, and heating costs become expensive and it is no longer profitable.

[0005] Land-based cultivation of Nori has been tested at universities in recent years, and it is cultivated during the low water temperature period from October to the end of March. During the period when the water temperature rises from April to October, growth is hindered, causing discoloration, making cultivation difficult in the summer.

[0006] Furthermore, there was a risk of bacteria or viruses being mixed into the water or seawater being supplied, which posed a risk of disease outbreaks. Shrimp and seaweed are also known to be susceptible to disease. [Means for solving the problem]

[0007] To solve this problem, shrimp can be cultivated in the same breeding tank when the water temperature is high, and seaweed such as nori can be cultivated when the water temperature is low. This makes it possible to cultivate shrimp all year round and eliminates the need for costs such as adjusting the water temperature.

[0008] In addition, by filtering the water or seawater supplied to the breeding tank through a UF membrane to a size of 0.01 microns, bacteria and viruses can be removed, thereby preventing diseases.

[0009] In addition, a nanobubble generator will be installed to generate microscopic bubbles in the tanks, and nanobubbles of oxygen or air will be supplied to shrimp farming, and nanobubbles of carbon dioxide will be supplied to seaweed farming, promoting growth. Effect of the Invention

[0010] By cultivating shrimp and seaweed in the same tank, they can be cultivated all year round without incurring heating costs, doubling sales with the same facilities. In addition, the use of seawater or water filtered through a UF membrane can help prevent the occurrence of diseases, and the supply of nanobubbles can promote growth. [Brief description of the drawings]

[0011] [Figure 1] Image of the aquarium [Diagram 2] Flow Diagram [Diagram 3] Illustration of the farming season DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] The aquaculture tank of the present invention shown in Figure 1 is connected to a pipe that supplies water or seawater, and an overflow outlet pipe is installed on the side of the tank. This allows new water to be constantly supplied. The water discharged from the tank passes through a purification tank, making aquaculture possible through a closed circulation system. Even in the case of free-flowing aquaculture, purified water can be discharged by passing it through the purification tank.

[0013] The water or seawater supplied to the breeding tank is stored in the tank before being fed and filtered through a UF membrane. Both closed circulation and free-flowing water pass through the UF membrane, so bacteria and viruses are removed.

[0014] Water or seawater filtered through the UF membrane is temporarily stored in an aquarium, and by supplying nanobubbles into the aquarium, it becomes nanobubble water, which can then be supplied to each breeding tank through a pump. When pouring water into the breeding tank, the water is supplied at an angle that creates a water current, and the water in the tank is gently rotated.

[0015] Shrimp farming is best done in water temperatures not lower than 20°C, and the start and end times vary depending on the temperature of the area where the tanks are installed. The baby shrimp used in shrimp farming are raised separately from the farming tanks and transferred to the breeding tanks at the appropriate time and size.

[0016] It is advisable to prepare the seedlings used for seaweed cultivation separately from the rearing tanks and cultivate them in stages in larger rearing tanks. The best time for seaweed cultivation is from autumn to spring, after shrimp cultivation has finished. EXAMPLES

[0017] This method of cultivating seaweed requires sunlight, so there is no need to bring it indoors to regulate the temperature, so the tanks are set up outdoors. The optimal size for management is a round or square tank, about 2 to 6 meters in diameter and 1 meter deep.

[0018] The water flow in this aquaculture method is as follows: water intake → UF membrane → water tank (nanobubble tank) → breeding tank → septic tank → discharge (or to the UF membrane in a closed cycle).

Claims

1. This is a land-based aquaculture method characterized by cultivating shrimp in the same aquaculture tank when the water temperature is warm and cultivating seaweed when the water temperature is cool, and is applicable to both closed circulation and free-flowing systems.

2. 2. The aquaculture method according to claim 1, wherein the water or seawater supplied to the tank is filtered through a UF membrane to prevent the introduction of bacteria and viruses and a water storage tank is provided to suppress the occurrence of diseases.

3. 3. The aquaculture method according to claim 1, wherein various gases such as air, oxygen, and carbon dioxide are supplied to the tank as fine bubbles by a nanobubble generator to promote the growth of the cultured organisms.

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