Culture facility

Abstract

To provide a culture facility that can generate culture water having high safety.SOLUTION: A culture facility according to an embodiment of the present disclosure comprises: a fish preserve capable of storing culture water; a supply line for supplying the culture water to the fish preserve; a UV sterilization device located in the supply line, and for irradiating the culture water with ultraviolet rays; and an oxygen dissolution device located in a portion downstream of the UV sterilization device in the supply line, and for dissolving oxygen in the culture water irradiated with the ultraviolet rays by the UV sterilization device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to aquaculture equipment.

Background Art

[0002] As a technology related to aquaculture equipment, Patent Document 1 discloses a method of mechanically dissolving pure oxygen in the same water as the breeding water using an oxygen dissolution device, injecting the dissolved high-concentration oxygen water into the breeding water, and breeding fish and shellfish. By using the oxygen dissolution device described in Patent Document 1, the breeding efficiency of aquaculture equipment can be improved.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, in order to produce aquaculture water that is highly safe for the aquaculture target, sterilization of the aquaculture water is required. For example, UV sterilization can be performed by irradiating the aquaculture water with ultraviolet light. However, when ultraviolet light is irradiated on aquaculture water with a high dissolved oxygen concentration, a large amount of oxygen contained in the aquaculture water changes into ozone. Since ozone has a strong oxidizing power, excessive generation of ozone is not preferable for the aquaculture target. Therefore, irradiating aquaculture water with a high dissolved oxygen concentration with ultraviolet light may be contrary to the production of highly safe aquaculture water.

[0005] Therefore, an object of the present disclosure is to provide aquaculture equipment capable of producing highly safe aquaculture water.

Means for Solving the Problems

[0006] The aquaculture facility according to one aspect of the present disclosure includes a fishpond capable of storing aquaculture water, a supply line for supplying the aquaculture water to the fishpond, a UV sterilizer located in the supply line for irradiating the aquaculture water with ultraviolet light, and an oxygen dissolution device located in a portion of the supply line downstream of the UV sterilizer for dissolving oxygen in the aquaculture water that has been irradiated with ultraviolet light by the UV sterilizer.

Effect of the Invention

[0007] According to the above configuration, it is possible to provide an aquaculture facility capable of generating highly safe aquaculture water.

Brief Description of the Drawings

[0008]

Figure 1

Embodiments for Carrying Out the Invention

[0009] Hereinafter, the aquaculture facility 100 according to the embodiment will be described. FIG. 1 is a schematic diagram of the aquaculture facility 100. As shown in FIG. 1, the aquaculture facility 100 according to the present embodiment includes a fishpond 11, a supply line 12, a water intake pump 13, a filtration device 14, a buffer tank 15, a transfer pump 16, a UV sterilizer 17, and an oxygen dissolution device 18. Hereinafter, these components will be described in order.

[0010] <Fishpond> The fishpond 11 is a part for accommodating the aquatic organisms to be cultured. In this embodiment, the aquatic organisms are fish. The fishpond 11 may be installed on land or in water. Also, the shape of the fishpond 11 is not limited. The fishpond 11 can store aquaculture water. The aquaculture water may be seawater or freshwater. The aquaculture water is supplied to the fishpond 11 from the supply line 12. Also, the aquaculture water stored in the fishpond 11 is discharged to the outside through the discharge port 21. The aquaculture water stored in the fishpond 11 may be continuously replaced or periodically replaced.

[0011] <Supply Line> The supply line 12 is a line for supplying culture water to the aquaculture tank 11. The supply line 12 is a flow path through which the culture water flows and may not be formed by piping. However, the portion downstream of the buffer tank 15 of the supply line 12 in the present embodiment and connecting each device is formed by piping. The culture water is subjected to various treatments while flowing along the supply line 12. The downstream end of the supply line 12 is located inside the aquaculture tank 11, and the filtration device 14 is located at the upstream end of the supply line 12.

[0012] <Water intake pump> The water intake pump 13 is a pump that takes in water to be culture water into the supply line 12. The water intake pump 13 in the present embodiment supplies the water taken in from a water source such as the sea, a river, or a pond to the supply line 12 via the water intake line 22. However, the water intake pump 13 may supply the culture water taken in from the aquaculture tank 11 to the water intake line 22. That is, the culture water may be circulated. The water intake pump 13 in the present embodiment is a submersible pump. Also, the type of the water intake pump 13 is non-self-priming. However, the water intake pump 13 may be a self-priming land pump. Note that a self-priming pump is a pump that can automatically discharge air and suck up water from the next time if it performs priming first.

[0013] <Filtration device> The filtration device 14 is a device for filtering culture water. The filtration device 14 in the present embodiment is located at the upstream end of the supply line 12, that is, at the inlet of the supply line 12. The water taken in by the water intake pump 13 is supplied as culture water to the upper part of the filtration device 14. The filtration device 14 includes a filtration filter 23, and the culture water supplied to the filtration device 14 passes through the filtration filter 23 by its own weight and is filtered. The culture water that has passed through the filtration filter 23 falls into the buffer tank 15.

[0014] As described above, in the filtration device 14 of the present embodiment, since the culture water passes through the filtration filter by its own weight, it is not necessary to increase the pressure of the culture water supplied to the filtration device 14. Therefore, according to the present embodiment, a pump with a small discharge head can be adopted as the water intake pump 13. Although the filtration device 14 of the present embodiment is installed on land, it may also be installed underwater.

[0015] <Buffer tank> The buffer tank 15 is a tank for temporarily storing the culture water. The buffer tank 15 is located downstream of the filtration device 14 in the supply line 12 and upstream of the transfer pump 16. The buffer tank 15 is located below the filtration device 14 when viewed from the filtration device 14 and can receive the culture water that has passed through the filtration filter 23. Also, the buffer tank 15 is open to the atmosphere.

[0016] <Transfer pump> The transfer pump 16 is a pump for transferring the culture water. The transfer pump 16 of the present embodiment is located in the supply line 12. Therefore, the culture water in the supply line 12 can be efficiently transferred. Also, the transfer pump 16 is a non-self-priming pump and is located downstream of the buffer tank 15 in the supply line 12 and upstream of the UV sterilization device 17. A non-self-priming pump has a larger discharge pressure with respect to the suction pressure than a self-priming pump. Therefore, the transfer pump 16 can strongly push out the culture water toward the UV sterilization device 17 and can transfer the culture water to the aquaculture pond 11.

[0017] Also, the transfer pump 16 of the present embodiment is located downstream of the buffer tank 15. That is, the buffer tank 15 is located between the water intake pump 13 and the transfer pump 16. Therefore, in the present embodiment, it is not necessary to match the amount of water taken in by the water intake pump 13 and the amount of culture water transferred by the transfer pump 16, and the degree of freedom in controlling the water intake pump 13 and the transfer pump 16 can be improved.

[0018] Also, as described above, since the buffer tank 15 of the present embodiment is open to the atmosphere, the aquaculture water upstream of the transfer pump 16 is reduced to a pressure close to atmospheric pressure. Therefore, in the present embodiment, a pump with a large discharge head is adopted as the transfer pump 16. Specifically, the discharge head of the transfer pump 16 is larger than the discharge head of the water intake pump 13. Therefore, according to the present embodiment, the aquaculture water in the supply line 12 can be appropriately transferred to the fishpond 11. As an example, the discharge head of the water intake pump 13 is 5 m, and the discharge head of the transfer pump 16 is 30 m.

[0019] <UV Sterilizer> The UV sterilizer 17 is a device that irradiates aquaculture water with ultraviolet rays. The UV sterilizer 17 of the present embodiment is located downstream of the transfer pump 16 in the supply line 12 and upstream of the oxygen dissolution device 18. By irradiating the aquaculture water with ultraviolet rays by the UV sterilizer 17 to perform UV sterilization, aquaculture water with high safety for the aquaculture target can be generated.

[0020] Also, since the filtration device 14 is located in a portion of the supply line 12 upstream of the UV sterilizer 17, the purification (sterilization) of the aquaculture water by the UV sterilizer 17 can be efficiently performed. Note that the UV sterilizer 17 of the present embodiment is installed on land, but it may also be installed in water.

[0021] <Oxygen Dissolution Device> The oxygen dissolving device 18 is a device that dissolves oxygen in the culture water. The oxygen dissolving device 18 receives the supply of oxygen from the oxygen supply facility. The oxygen supply facility 18 is, for example, a PSA (Pressure Swing Adsorption) type oxygen gas generator. The oxygen dissolving device 18 can dissolve oxygen in the culture water by supplying the culture water into oxygen, and generate culture water with a high dissolved oxygen concentration. The oxygen dissolving device 18 may be, for example, a method of dissolving oxygen in the supply water by pushing out the supply water like a water spray using a screw or the like, a method of supplying small bubbles / microbubbles to the supply water, or a method of passing the atomized supply water through a space of high-pressure oxygen. In the oxygen dissolving device 18, water with a high dissolved oxygen concentration can be efficiently generated. Note that the specific configuration of the oxygen dissolving device 18 is not limited. For example, the oxygen dissolving device 18 may mechanically dissolve oxygen in the supply water by increasing the surface area of the supply water by diffusing the supply water inside and bringing it into contact with oxygen in that state. If the culture is carried out using the culture water generated by the oxygen dissolving device 18, the culture density can be improved.

[0022] Also, the oxygen dissolving device 18 is located at a portion downstream of the UV sterilizing device 17 in the supply line 12. Therefore, the oxygen dissolving device 18 dissolves oxygen in the culture water after the UV sterilizing device 17 irradiates ultraviolet rays. In other words, the UV sterilizing device 17 irradiates ultraviolet rays on the culture water before the oxygen dissolving device 18 dissolves oxygen.

[0023] Here, when oxygen is irradiated with ultraviolet rays, ozone is generated, and ozone has a strong oxidizing power. Therefore, the culture water containing excessive ozone may have an adverse effect on the culture target. Therefore, in the present embodiment, the oxygen dissolving device 18 is arranged at a portion downstream of the UV sterilizing device 17 in the supply line 12. According to this configuration, the culture water irradiated with ultraviolet rays by the UV sterilizing device 17 is the culture water before oxygen is dissolved and does not contain a large amount of oxygen. Therefore, even if the UV sterilizing device 17 irradiates ultraviolet rays on the culture water, a large amount of ozone will not be generated, and the safety of the culture water can be ensured.

[0024] (Summary) The first item disclosed in this specification is an aquaculture facility comprising a live fish basket capable of storing aquaculture water, a supply line for supplying the aquaculture water to the live fish basket, a UV sterilization device located in the supply line for irradiating the aquaculture water with ultraviolet light, and an oxygen dissolution device located in a portion of the supply line downstream of the UV sterilization device for dissolving oxygen in the aquaculture water irradiated with ultraviolet light by the UV sterilization device.

[0025] According to this configuration, since the oxygen dissolution device is located downstream of the UV sterilization device, the amount of oxygen contained in the aquaculture water irradiated with ultraviolet light by the UV sterilization device is not large. Therefore, the generation amount of ozone can be suppressed.

[0026] The second item disclosed in this specification is the aquaculture facility according to the first item, further comprising a filtration device located in a portion of the supply line upstream of the UV sterilization device.

[0027] According to this configuration, the aquaculture water can be efficiently purified.

[0028] The third item disclosed in this specification is the aquaculture facility according to the first item, further comprising a water intake pump for taking in water to be aquaculture water into the supply line and a transfer pump located in the supply line.

[0029] According to this configuration, the aquaculture water can be efficiently conveyed along the supply line.

[0030] The fourth item disclosed in this specification is the aquaculture facility according to the third item, wherein the transfer pump is located in a portion of the supply line upstream of the UV sterilization device.

[0031] According to this configuration, the transfer pump can extrude the aquaculture water toward the UV sterilization device, and the aquaculture water can be conveyed to the live fish basket.

[0032] The fifth item disclosed in this specification is the aquaculture facility according to item 3, further comprising a buffer tank located upstream of the transfer pump in the supply line for temporarily storing aquaculture water.

[0033] According to this configuration, it is not necessary to match the amount of water taken in by the intake pump and the amount of aquaculture water transferred by the transfer pump, and the degree of freedom in controlling the intake pump and the transfer pump can be improved.

[0034] The sixth item disclosed in this specification is the aquaculture facility according to any one of items 3 to 5, wherein the discharge head of the transfer pump is larger than the discharge head of the intake pump.

[0035] According to this configuration, the aquaculture water in the supply line can be appropriately transferred to the aquaculture pond.

[0036] The seventh item disclosed in this specification is the aquaculture facility according to item 5 or 6, further comprising a filtration device located upstream of the buffer tank in the supply line and including a filtration filter through which aquaculture water can pass by its own weight, and the aquaculture water passing through the filtration filter falls into the buffer tank.

[0037] According to this configuration, since it is not necessary to increase the pressure of the aquaculture water supplied to the filtration device, a pump with a small discharge head can be adopted as the intake pump.

Explanation of Reference Numerals

[0038] 11 Aquaculture pond 12 Supply line 13 Intake pump 14 Filtration device 15 Buffer tank 16 Transfer pump 17 UV sterilization device 18 Oxygen dissolution device 21 Drain outlet 22 Intake line 23 Filtration filter 100 Aquaculture facility

Claims

1. A raw fish basket capable of storing aquaculture water, A supply line for supplying aquaculture water to the raw fish basket, A UV sterilizer located on the supply line for irradiating aquaculture water with ultraviolet light, An oxygen dissolution device located in a portion of the supply line downstream of the UV sterilizer for dissolving oxygen in the aquaculture water irradiated with ultraviolet light by the UV sterilizer, and an aquaculture facility.

2. The aquaculture facility according to claim 1, further comprising a filtration device located in a portion of the supply line upstream of the UV sterilizer.

3. A water intake pump for taking in water to be aquaculture water into the supply line, A transfer pump located on the supply line, and the aquaculture facility according to claim 1.

4. The transfer pump is located in a portion of the supply line upstream of the UV sterilizer, and the aquaculture facility according to claim 3.

5. A buffer tank located in a portion of the supply line upstream of the transfer pump for temporarily storing aquaculture water, and the aquaculture facility according to claim 3.

6. The discharge head of the transfer pump is greater than the discharge head of the water intake pump, and the aquaculture facility according to claim 3.

7. A filtration device located in a portion of the supply line upstream of the buffer tank, including a filtration filter through which aquaculture water can pass by its own weight, and the aquaculture water passing through the filtration filter falls into the buffer tank, and the aquaculture facility according to claim 5.

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