Breeding device and method for sea grapes

Abstract

To provide a breeding device and method for sea grapes, which can reduce an installation area, have a compact structure and large yield, and enhanced breeding efficiency.SOLUTION: A breeding device 1 for sea grapes breeds sea grapes in a vertical direction, by arranging multiple net racks R on which seedling of sea grapes are planted in a breeding water tank 11, circulating and filtering sea water for breeding the sea grapes on each rack R, the device comprises: one or more breeding water tanks 11 whose upper end is open, formed of a light transmissive material, and formed in a bottomed and vertically long cylindrical shape; a bottomed and vertically long cylindrical filtration water tank 12 for circulating sea water to the filtration filter 13 disposed inside, for filtering the sea water; a lower pipe line 14 which flows the sea water from the bottom of the breeding water tanks 11 for making the sea water flow into a lower part of the filtration water tank 12 by a circulation pump 14a; and an upper pipe line 15 for making the sea water overflowing from the upper part of the filtration water tank 12 flow into the upper part of the breeding water tank 11, where, the multiple net racks R on which seedlings are planted, are connected in a vertical row by a suspension string S, so that bottom faces of the net racks are horizontally arranged, and in the state, the net racks R are suspended from an upper part of the breeding water tank 11 to inside.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a sea grape cultivation method and a sea grape cultivation apparatus. [Background technology]

[0002] Sea grapes (Caulerpalentillifera: Caulerpalentillifera, Cauleraceae, Japanese name: Kubiredzuta) are seaweeds that grow naturally in warm waters, and their northern limit is said to be south of the main island of Okinawa. Cultivation equipment that can be used to cultivate sea grapes in Honshu has been proposed. As the growing conditions for sea grapes are relatively harsh, there is a demand for equipment that can meet these growing conditions. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-330119 A Summary of the Invention [Problem to be solved by the invention]

[0004] Since the sea grape cultivation equipment disclosed in Patent Document 1 is a large-scale facility, there is a demand for equipment that requires a small installation area and produces a large yield.

[0005] The object of the present invention is to solve the above-mentioned problems and to provide a sea grape cultivation device that has a compact structure that requires a small installation area, and can achieve high yields and high cultivation efficiency. [Means for solving the problem]

[0006] A first aspect of the present invention is a method for cultivating sea grapes, and in order to solve the above problems, a number of net shelves on which sea grape seeds have been planted are hung in a vertical chain shape with strings so that the shelf surface is horizontal, and these chain-like net shelves are hung from above into a long, vertically long, cylindrical aquaculture tank made of a light-transmitting material with an open top, and immersed in seawater flowing from top to bottom inside the aquaculture tank, causing the sea grapes on each net shelf to grow in the vertical direction, and after a required growth period has elapsed, the strings are lifted to pull the multiple net shelves on which the sea grapes have been grown above the aquaculture tank and the shelves are collected, and the sea grapes are harvested from each net shelf.

[0007] A second aspect of the present invention is a sea grape cultivation device, which solves the above-mentioned problems by arranging a plurality of net shelves on which sea grape seedlings are planted in a cultivation tank, filtering and circulating seawater to grow sea grapes vertically from each net shelf, and the cultivation device comprises one or more cultivation tanks made of a light-transmitting material and having an open upper end, a bottomed, vertically tubular filtration tank having a bottomed, vertically tubular filtration tank having a filtration filter 13 therein for filtering seawater by passing it through the filtration filter 13, a lower piping system that discharges seawater from the bottom of the cultivation tank and flows it into the lower part of the filtration tank with a circulation pump, and an upper piping system that flows seawater overflowing from the upper part of the filtration tank into the upper part of the cultivation tank, and the plurality of net shelves on which seedlings are planted are connected vertically with hanging strings so that the bottom part is horizontal and are suspended from above into the cultivation tank.

[0008] A third inventive aspect of the present application is a sea grape cultivation device which, in addition to the configuration of the second inventive aspect, further comprises a supply tank for storing the make-up seawater, a third piping system including a pump for causing the seawater stored in the supply tank to flow into the aquaculture tank, and a group of sensors for detecting the salinity concentration, carbon dioxide concentration, turbidity, water level, and pH of the seawater flowing through the aquaculture tank or the filtration tank, and a measurement and control device for calculating measurement values ​​based on detection signals from the group of sensors.

[0009] A fourth aspect of the present invention is a sea grape cultivation apparatus which, in addition to the configuration of the second aspect of the invention, adds the required salt, alkali, or carbon dioxide gas to the seawater stored in the supply tank based on the measurement values ​​of the measurement and control device, and replenishes this seawater into the culture tank at the required time, while discharging seawater flowing through the lower piping system in an amount equal to the amount of replenished seawater.

[0010] A fifth aspect of the present invention is a sea grape cultivation device which, in addition to the configuration of the second aspect of the invention, is configured to provide the filtration tank with a seawater temperature adjustment means, such as a heat exchanger through which cooling water, cold or hot water, hot water, or steam flows, a pipe with a built-in heater, or a heat pipe.

[0011] A sixth aspect of the present invention is a sea grape cultivation device which, in addition to the configuration of the second aspect of the invention, is configured to include a curtain rail which is erected at a required height so as to surround the aquaculture tank and the filtration tank, and a shading curtain which is hung on the curtain rail and expanded to surround the aquaculture tank and the filtration tank when the temperature of the seawater flowing through the aquaculture tank rises to a required temperature close to 30°C.

[0012] A seventh aspect of the present invention is a sea grape cultivation device which, in addition to the configuration of the second aspect of the invention, is configured to include a metahalide lamp that is arranged opposite the cultivation tank and illuminates the cultivation tank from the outside when the temperature of the seawater flowing through the cultivation tank drops to a required temperature close to 15°C, thereby warming the seawater flowing through the cultivation tank. Effect of the Invention

[0013] According to the present invention, it is possible to provide a sea grape cultivation device that has a compact structure that requires a small installation area, and that can achieve a large yield and high cultivation efficiency. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a front view of an aquaculture device according to a first embodiment of the present invention. [Diagram 2]FIG. 4 is a front view of an aquaculture device according to a second embodiment of the present invention. BEST MODE FOR CARRYING OUT THEINVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0016] [First embodiment] Fig. 1 shows a culture device according to a first embodiment of the present invention. This culture device 1 is a culture device in which a plurality of net shelves R on which sea grape seedlings (mother algae) are planted are arranged vertically in a culture tank 11, seawater is filtered and circulated, and sunlight is irradiated to grow sea grapes.

[0017] The aquaculture device 1 has two aquaculture tanks 11 and one filtration tank 12 arranged side by side, and these tanks 11, 11, 12 are connected by a lower piping system 14 and an upper piping system 15.

[0018] The aquaculture tank 11 is made of a light-transmitting material such as glass or plastic, has a circular horizontal cross section, an open top, and a bottomed, vertically long cylindrical shape. The aquaculture tank 11 may be one, or may be three or more. The aquaculture tank 11 is made of a light-transmitting material so that sunlight, which is involved in the growth of the sea grapes, can reach the inside of the tank, allowing the sea grapes to perform carbon dioxide assimilation. The aquaculture tank 11 is made of a light-transmitting material so that the sunlight, which is involved in the growth of the sea grapes, can reach the inside of the tank, allowing the sea grapes to perform carbon dioxide assimilation. The aquaculture tank 11 is made of a vertically long cylindrical shape so that the device can be made compact and the ground area can be small, and the net shelves R, which are the growth stage of the sea grapes A, can be arranged in a multi-tiered suspended state, ensuring a large yield. The net shelves R may be, for example, a shallow dish-like shape consisting of a bottom part and a short peripheral wall part, and have holes that allow good seawater flow and are large enough to allow the stems of the sea grapes to extend downward.

[0019] The filtration tank 12 is also made of a light-transmitting material such as glass or plastic, and is a vertically long cylinder with a circular horizontal cross section and an open top end. The filtration tank 12 has a filter 13 inside, and seawater is passed through the filter 13 to filter the seawater. There are various types of filtration, such as coarse filtration, fine filtration, ultrafiltration, and reverse osmosis. The filter 13 only needs to be able to capture fine impurities, and it is recommended to use a ring-shaped ceramic filter medium that is less likely to clog and has good water permeability, and a coarse filter medium that can separate particles larger than 10 μm on the upstream side (lower layer) of the ring-shaped ceramic filter medium as a pretreatment. If the filter 13 becomes clogged, the circulation of seawater will be impaired, diseases will occur, and bad odors will occur, so the filter medium must be replaced regularly or removed from the tank for cleaning. The top end of the filtration tank 12 is open so that the filter 13 can be removed from the tank.

[0020] A drain valve 23 for draining all the seawater is provided at the bottom of the aquaculture tanks 11, 11 and the filtration tank 12.

[0021] The lower piping system 14 discharges seawater from the bottom of the aquaculture tanks 11, 11 and causes it to flow into the lower part of the filtration tank 12 by a circulation pump 14a. The lower piping system 14 is provided with a drain pipe 22 including an electromagnetic valve 22a.

[0022] The upper piping system 15 allows seawater overflowing from the top of the filtration tank 12 to flow into the top of the aquaculture tanks 11, 11. The seawater overflow of the filtration tank 12 is provided higher than the seawater inlet of the aquaculture tanks 11, 11, and the circulating flow rate of seawater is set so that the seawater level of the filtration tank 12 coincides with the seawater overflow and the seawater level of the aquaculture tanks 11, 11 is required to be lower than the seawater inlet. This allows the seawater overflowing from the filtration tank 12 to flow smoothly through the upper piping system 15.

[0023] In the aquaculture tanks 11, 11, a number of net shelves R on which sea grape seedlings A are planted are connected in a vertical row with hanging strings S so that the bottom parts are horizontal, and are suspended from above into the aquaculture tank 11. The protruding end of an L-shaped bracket 21 that is supported on the upper end of the outer surface of the aquaculture tank 11 and can rotate horizontally can swing upward corresponding to the center of the aquaculture tank 11, and the upper end of the hanging string S is engaged with the protruding end of the L-shaped bracket 21 to hold the number of net shelves R connected in a vertical row with a required interval between them. In this way, the number of net shelves R suspended in the aquaculture tanks 11, 11 are arranged at the required intervals, and the sea grape seedlings planted on each net shelf R can grow vertically. When harvesting the grown sea grapes A, the upper end of the hanging rope S is connected to a lifting machine, the L-shaped bracket 21 is rotated outside the aquaculture tank 11, and the multiple net shelves R are suspended and lowered outside the aquaculture tank 11. After the sea grapes A to be used as seedlings are cut and placed on the net shelves R, they are suspended and lowered back into the aquaculture tank 11.

[0024] Furthermore, the aquaculture device 1 has a supply tank 16 for storing supply seawater, a third piping system 17 connecting the supply tank 16 and the aquaculture tank 11, and a group of sensors 18 and a measurement and control device 19 for managing the quality of the seawater in the filtration tank 12.

[0025] As sea grapes A grow in the culture tank 11, they absorb minerals and carbon dioxide gas in the seawater in the presence of sunlight. Even if the seawater is temperature controlled and circulated, if there is a shortage of salt, minerals, carbon dioxide gas, etc. in the seawater, the sea grapes will not grow. For this reason, seawater that contains a lot of salt, minerals, carbon dioxide gas, etc. is made and stored in the supply tank 16 for replenishment.

[0026] The sensor group 18 is provided in a state of being immersed in seawater at the upper part of the filtration water tank 12. The sensor group 18 is a collection of a sensor that senses the salinity concentration, a sensor that senses the carbon dioxide concentration, a sensor that senses the turbidity, a sensor that senses the water level, and a sensor that senses the pH.

[0027] The measurement and control device 19 calculates the salinity concentration, carbon dioxide concentration, turbidity, water level, and pH value based on the detection signals of the sensor group 18. The measurement and control device 19 calculates the required amount of salinity, alkali, or carbon dioxide to be added to the seawater stored in the supply tank 16 based on the calculated measurement values.

[0028] The third piping system 17 includes a seawater supply pump 17a, which operates based on a control signal from the measurement and control device 19 to cause seawater stored in the supply tank 16 to flow into the lower part of the aquaculture tank 11, and the solenoid valve 22a is configured to open for a required period of time based on a control signal from the measurement and control device 19 to drain from the drain piping 22 an amount of seawater flowing through the circulating pump 14a equal to the amount of seawater supply.

[0029] Sea grapes can grow at seawater temperatures of 15-30°C, with 24°C being the optimum growth temperature. Therefore, in the present invention, temperature control is performed so that the seawater temperature is within the range of 20-28°C. For this reason, the aquaculture device 1 is equipped with a cooling water pipe, a cold / hot water pipe, a hot water pipe, or a heater as a seawater temperature adjustment means 20 in the filtration water tank 12. The seawater temperature adjustment means 20 only needs to be able to operate intermittently, and is configured to, for example, flow cold water when the temperature of the seawater flowing through the aquaculture tank 11 rises to 30°C, preferably close to 28°C, and to flow hot water when the temperature drops to close to 15°C, preferably close to 20°C.

[0030] [Second embodiment] FIG. 2 shows a culture device according to a second embodiment of the present invention. This culture device 1A is a culture device in which a plurality of net shelves R on which sea grape seedlings are planted are arranged vertically in a culture tank 11, seawater is filtered and circulated, and sunlight is irradiated to grow sea grapes. The culture device 1A has two culture tanks 11 and one filtration tank 12 arranged side by side, and these tanks 11, 11, 12 are connected by a lower piping system 14 and an upper piping system 15. Furthermore, the culture device 1A has a sensor group 18 and a measurement and control device 19, a supply tank 16, a third piping system 17 including a seawater supply pump 17a, and a drain pipe 22 including an electromagnetic valve 22a. These configurations are the same as those of the culture device 1 according to the first embodiment.

[0031] The configuration of the aquaculture device 1A of the second embodiment differs from the configuration of the aquaculture device 1 of the first embodiment in that the aquaculture device 1A of the second embodiment does not have the seawater temperature adjustment means 20 provided in the aquaculture device 1 of the first embodiment, and instead the aquaculture device 1A is provided with a curtain rail 24 and a light-blocking curtain (not shown) that is hung on the curtain rail 24, and a metahalide lamp 25 that illuminates the aquaculture tanks 11, 11 from the outside.

[0032] The curtain rail 24 is installed on the side of the aquaculture tanks 11, 11 that is exposed to sunlight. The shading curtain (not shown) can be normally removed and is installed when the seawater temperature is expected to rise above 28°C. The metahalide lamps 25 may be installed in winter and turned on to irradiate the aquaculture tank 11 when a strong cold wind blows against the aquaculture tanks 11, 11 and the seawater temperature drops to, for example, 20°C.

[0033] [The method for cultivating sea grapes according to the present invention] As shown in FIG. 1, the sea grape cultivation method of the present invention involves hanging a number of net shelves R on which sea grape seedlings have been planted in a vertical chain shape with a string S so that the shelf surface is horizontal, and hanging these multiple linked net shelves R from above into a culture tank 11, which is a vertically long, cylindrical tank with a bottom and made of a light-transmitting material with an open top, and immersing them in seawater flowing from top to bottom inside the culture tank 11 to grow the sea grapes on each net shelf R in the vertical direction. After a required growth period has elapsed, the string S is lifted to pull the multiple net shelves R on which the sea grapes have grown above the culture tank 11, and the sea grapes are harvested from each net shelf R.

[0034] Since multiple net shelves R are arranged in a chain in the vertically long cylindrical aquaculture tank 11, the ground surface area is small, and since seawater flows downward in the aquaculture tank 11, the sea grape seedlings planted on the net shelves R grow upward and downward due to the net shelves R, and since sunlight shines into the aquaculture tank 11 made of a light-transmitting material, the sea grapes can grow by carbon dioxide assimilation. In addition, the sea grape cultivation method constantly senses the seawater temperature and carbon dioxide concentration in the seawater, controls the seawater temperature to an optimal 24°C using a seawater temperature adjustment means, and when the concentration drops, seawater injected with carbon dioxide is replenished to increase the yield.

[0035] [Peripheral parts of the invention] A saltwater fish tank may be provided adjacent to the culture tank 11, connected by a lower piping system 14 and an upper piping system 15, and a lattice may be provided at the connection port of the lower piping system 14 to prevent the saltwater fish from escaping, so that the culture tank 11 has a refugium function for the saltwater fish tank. Oxygen produced by sea grapes A through the carbon dioxide assimilation action of sea grapes A and dissolved in seawater is inoculated to the saltwater fish. [Explanation of symbols]

[0036] 1, 1A...Culture equipment, 11...Aquaculture tank 11, 12... Filtration tank, 13... Filtration filter, 14…Lower piping system, 14a…Circulation pump, 15...Upper piping system, 16…supply tank, 17…Third piping system, 17a…Seawater supply pump, 18...Sensor group, 19...Measuring and control equipment, 20...Sea water temperature control means, 21...L-shaped bracket, 22...Drain piping, 22a...Solenoid valve, 23...Drain valve, 24…Curtain rail, 25...Metahalide lamp, A…Sea grapes, R… Mesh shelf.

Claims

1. A plurality of net shelves on which sea grape seedlings have been planted are hung in a vertical chain with a string so that the shelf surface is horizontal, and the plurality of linked net shelves are hung from above into a vertically elongated cylindrical aquaculture tank made of a light-transmitting material with an open top, and immersed in seawater flowing from top to bottom in the aquaculture tank, so that the sea grapes on each net shelf grow vertically, and after a required growth period has elapsed, the string is lifted to pull the plurality of net shelves on which the sea grapes have grown above the aquaculture tank and collected, and the sea grapes are harvested from each net shelf. A method for cultivating sea grapes.

2. A sea grape cultivation device that includes a plurality of net shelves on which sea grape seeds are planted in a culture tank, and that grows sea grapes vertically from each net shelf by filtering and circulating seawater, One or more of the aquaculture tanks, each of which is made of a light-transmitting material and has a vertically elongated cylindrical shape with a bottom and an open upper end; a filtration water tank having a bottom and a vertically long cylindrical shape, the filtration water tank having a filtration filter therein and for filtering seawater by passing the seawater through the filtration filter; A lower piping system that discharges seawater from the bottom of the aquaculture tank and causes seawater to flow into the lower part of the filtration tank using a circulation pump; and an upper piping system for causing seawater overflowing from the upper portion of the filtration tank to flow into the upper portion of the aquaculture tank; The plurality of net shelves on which the seedlings are planted are connected in a vertical row with hanging strings so that the bottom parts are horizontal, and are suspended from above into the aquaculture tank. A sea grape cultivation device characterized by the above.

3. A supply tank for storing the supply seawater; A third piping system including a pump for causing seawater stored in the supply tank to flow into the aquaculture tank; The apparatus further includes a sensor group for detecting the salinity, carbon dioxide concentration, turbidity, water level, and pH of the seawater flowing through the aquaculture tank or the filtration tank, and a measurement and control device for calculating measurement values ​​based on the detection signals of the sensor group. The sea grape cultivation apparatus according to claim 2.

4. The system is configured to add the required amount of salt, alkali, or carbon dioxide gas to the seawater stored in the supply tank based on the measurement value of the measurement and control device, and to supply the seawater to the aquaculture tank at the required timing, while discharging the seawater flowing through the lower piping system in an amount equal to the amount of the seawater replenished. The sea grape cultivation apparatus according to claim 2.

5. The sea grape cultivation device according to claim 2, further comprising a heat exchanger through which cooling water, cold or hot water, hot water, or steam flows, a pipe having a built-in heater, or a heat pipe, as a seawater temperature adjustment means in the filtration water tank.

6. A curtain rail installed at a required height so as to surround the aquaculture tank and the filtration tank; and a light-shielding curtain that is hung on the curtain rail and spread to surround the aquaculture tank and the filtration tank when the temperature of the seawater flowing through the aquaculture tank rises to a required temperature close to 30°C. The sea grape cultivation apparatus according to claim 2.

7. A metal halide lamp is provided which is arranged to face the aquaculture tank and illuminates the aquaculture tank from the outside to warm the seawater flowing through the aquaculture tank when the temperature of the seawater flowing through the aquaculture tank drops to a required temperature close to 15°C. The sea grape cultivation apparatus according to claim 2.

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