Aquaculture container

Abstract

To provide aquaculture containers that can improve aquaculture productivity.SOLUTION: An aquaculture container 1 comprises a bag body 2 that is submerged in an aquarium with a culture subject therein, and an injection hole 3 through which culture water is injected into the bag body 2. The aquaculture container 1 comprises a drainage hole 5 provided on a wall surface 4 of the bag body 2 for draining culture water AW in the bag body 2 into the aquarium. The bag body 2 is made of a flexible, transparent synthetic resin.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an aquaculture container. [Background technology]

[0002] 2. Description of the Related Art Conventionally, culture containers for accommodating marine products such as seed shellfish and culturing them, such as seeding bags for Nori seaweed culture, have been known (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-80684 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, there is a consideration of cultivating the seaweed, Anemone nigricans, on land. Anemone nigricans grows naturally, attached to rocky reefs with good wave exposure at a depth of about 10m. For this reason, in order to improve productivity when cultivating, it is necessary to reproduce suitable growing conditions on land that are close to those found in the wild, such as appropriate water temperature, water flow, and lighting, and further improvements are desired.

[0005] Therefore, an object of the present invention is to provide an aquaculture container that can improve aquaculture productivity. [Means for solving the problem]

[0006] The culture container of the present invention comprises a bag body in which the culture subject is placed and submerged in a water tank, an injection hole for injecting culture water into the bag body, and a drainage hole provided on the wall of the bag body for draining the culture water in the bag body into the water tank. The bag body is characterized by being made of a flexible transparent synthetic resin. Effect of the Invention

[0007] According to the present invention, there is provided an aquaculture container capable of improving aquaculture productivity. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing the overall configuration of an aquaculture container according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a front view illustrating the configuration of the culture container. [Diagram 3] FIG. 1 is a side view illustrating how the culture container expands and deforms when culture water is injected. [Figure 4] FIG. 1 is a side view showing an overall configuration of a land-based aquaculture plant using an aquaculture container according to an embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In the following, in an embodiment of the present invention, a culture container 1 for cultivating Porphyra japonica on land will be described with reference to the drawings as appropriate. In addition, the same components are given the same reference numerals, and duplicated descriptions will be omitted.

[0010] FIG. 1 is a perspective view illustrating the configuration of a culture container 1 according to a first embodiment of the present invention. The culture container 1 of the embodiment includes a bag body 2 in which a kind of seaweed, Anemone arborescens G (see FIG. 3), is placed as a culture target, and an injection hole 3 for injecting culture water AW into the bag body 2. The bag body 2 is partially or entirely submerged in hot spring water SW in a primary water tank 21 (see FIG. 4) described later.

[0011] Of these, the bag body 2 of the embodiment is configured as a flexible transparent vinyl (polyvinyl chloride resin) bag. The bag body 2 has a pair of vinyl walls 4, 4 overlapping in the out-of-plane direction, and an upper edge 2a, a lower edge 2b, a left edge 2c, and a right edge 2d provided around these walls 4. Of these, the left edge 2c and the right edge 2d may be provided with gussets, for example. The gussets formed in the edges 2c, 2d on both sides allow expansion and deformation when the walls 4, 4 are spaced apart by a certain distance in the outward direction.

[0012] The wall surfaces 4 of the bag body 2 are each flat and have a generally rectangular shape when viewed from the front (see FIG. 2). The two walls 4, 4 are folded back at the upper edge 2a, lower edge 2b, left edge 2c, and right edge 2d to form a bag. An openable opening may be formed at the upper edge 2a of the bag body 2. The opening is opened when the cultivated algae G is placed in the storage section 6. The opening is closed when the algae G is stored in the storage section 6. Inside the bag body 2, a storage space 6 is formed, the four sides of which are surrounded by the upper, lower, left and right edges 2a to 2d.

[0013] In the culture container 1, when no culture object or culture water AW is placed in the bag body 2, the inner surfaces of the two walls 4, 4 come into contact with each other, thereby minimizing the volume of the storage section 6. In this state, the bags 2 are flat and in surface contact with each other, and can be folded or stacked to form a compact state. Therefore, when storing a plurality of these bags 2 before and after aquaculture, they do not take up much space even if they are stacked in large quantities.

[0014] The bag body 2 expands and deforms when the culture water AW is poured in. At this time, the bag body 2 bends outwardly so that the wall surfaces 4, 4 move away from each other as shown by the imaginary lines in FIG. In the embodiment, the bag body 2 is spaced the widest near the center when viewed from the front as shown in Fig. 2. This forms a relatively wide culture area near the middle of the internal storage section 6. For example, the storage section 6 is bulged at the center to have a generally cylindrical shape with a circular cross-sectional shape such as an oval or ellipse, and each end is sharpened. That is, the bag body 2 expands and deforms to a desired size as shown by the imaginary lines in Figure 3. The expanded and deformed bag body 2 has an expanded dimension D1 at the middle position in the up-down and left-right directions that is larger than the expanded dimensions D2 and D3 near the upper edge 2a and the lower edge 2b. As a result, when the bag body 2 expands and deforms due to water injection, the middle portion has a wider expanded shape than both ends.

[0015] Furthermore, the bag body 2 of the embodiment is set so that the expanded dimension D1 is larger than the expanded dimension in the vicinity of each of the edges 2c, 2d (see FIG. 1). Therefore, as shown in FIG. 3, the stored algae G can be allowed to drift within a relatively large culture area formed near the middle of the storage section 6. As a result, the capacity of the storage section 6 formed inside the bag body 2 is larger than when the two walls 4, 4 are in contact with each other. In this embodiment, the capacity of the storage section 6 can be expanded to a desired size more easily by the gussets formed on the edges 2c, 2d on both sides. The algae G stored in the relatively wide culture area formed near the middle of the storage section 6 can be allowed to drift.

[0016] When the culture water AW is injected into the storage section 6 from the tip 7a of the water injection pipe 7, the expanded and deformed bag body 2 causes the culture water AW to flow back up and down or left and right. The culture water AW then circulates around the intermediate position along the inside of the wall surface 4 that bulges out in an arc shape. As a result, the algae G drift with the current of the circulating culture water AW and gather near the middle position in the vertical and horizontal directions. The algae G then come into contact with each other and entangle their stolon (runners) to form clumps. The clumped algae G drift in the culture water AW without adhering to any part, as shown in Figure 3. Therefore, the algae G cultivated in the culture container 1 of the embodiment is prevented from being damaged by minimizing contact with the inner wall surface of the bag body 2, etc.

[0017] Furthermore, each wall surface 4 of the bag body 2 is provided with a plurality of drainage holes 5 for draining the culture water AW in the bag body 2 toward the inside of the primary water tank 21. The drainage holes 5 in the embodiment are evenly distributed and arranged in a lattice pattern at predetermined intervals on each wall surface 4, 4. Each drainage hole 5 is formed as a round hole penetrating the wall surface 4 in the in-plane and out-of-plane directions. As shown in Fig. 1, each drainage hole 5 is set to a size that allows the culture water AW in the storage section 6 to be drained to the outside. The culture water AW in the storage section 6 flows along the inside of the wall surface 4 and is drained from each drainage hole 5 to the outside.

[0018] In addition, each drainage hole 5 is set to a size that prevents the algae G in the storage section 6 from flowing out to the outside. Therefore, small algae G in the middle of growth are unlikely to flow out to the outside through the drainage hole 5 even if they are not clumped together by entangling runners. As shown in Fig. 3, the bag body 2 allows the algae G to remain in the storage section 6 so that they are entangled with each other. This allows the algae G cultivated in the storage section 6 to be efficiently agglomerated without reducing the quantity.

[0019] 1, the injection hole 3 of the bag body 2 of the embodiment is formed in the upper edge portion 2a at a central position in the left-right direction W. A tubular water injection pipe 7 is inserted in the inward-outward direction through the injection hole 3. The water injection pipe 7 has a base end connected to a culture water piping 8 that supplies the culture water AW (see FIG. 4). A tip 7a of the water injection pipe 7 on the opposite side to the base end is extended to a middle position of the storage section 6. The culture water AW delivered from the culture water piping 8 through the water injection pipe 7 is discharged downward from the tip 7a to near the middle of the storage section 6 in the vertical and horizontal directions W. The culture water AW discharged from the tip 7a into the storage section 6 is poured directly into the culture water AW filling the storage section 6. Therefore, air is not entrained during pouring, and no air bubbles are generated in the culture water AW. Therefore, the air bubbles do not physically come into contact with the algae G that are clumped together near the middle position of the storage section 6. Therefore, the culture container 1 of the embodiment does not damage the algae G growing in the bag body 2.

[0020] 1, the culture water AW is poured into the storage section 6 from a tip 7a at a middle position of the storage section 6. After the culture water AW is stirred by the water flow inside the storage section 6, the culture water AW is discharged to the outside from each of the drainage holes 5 formed at predetermined intervals on the wall surfaces 4, 4. Therefore, the fresh culture water AW is in a so-called free-flowing state. The culture water AW passes through the storage section 6, generating a water current and stirring the algae G, before being discharged. This eliminates the need for wave-making equipment for stirring the culture water AW or mechanical equipment for aeration in the culture facility.

[0021] 4, the land-based aquaculture facility of the embodiment includes a hot spring plant 10 as a primary utilization facility and a land-based aquaculture plant 20 as a secondary utilization facility. The culture water AW poured into the bag body 2 of the embodiment is heated by using the heat of hot spring water SW supplied from the source of the hot spring 9.

[0022] The hot spring plant 10 of the embodiment has a hot spring utilization facility 11 such as a greenhouse or bathing area that makes primary use of hot spring water SW sent from a hot spring 9 as a heat source. The hot spring utilization facility 11 also has a heat exchanger 12. The hot spring water SW is drawn into the hot spring utilization facility 11 and the heat exchanger 12 from the hot spring 9 via an inlet pipe.

[0023] The hot spring utilization facility 11 is also provided with hot spring water piping 13 for discharging hot spring water SW. The hot spring water piping 13 is connected to a heat exchanger 12. The heat exchanger 12 performs heat exchange using the heat of the hot spring water SW drawn from the hot spring 9 as a heat source to warm the culture water AW to a temperature suitable for culture. The heat exchanger 12 can also perform heat exchange using the heat of the waste hot water DW, which has a lower temperature than the hot spring water SW of the hot spring 9, as a heat source. For example, the heat exchanger 12 may adjust the ratio of hot spring water SW and waste hot water DW used for heat exchange. As a result, seawater MW taken from the water intake port M becomes culture water AW at a temperature suitable for culture when passing through the heat exchanger 12 via the water intake pipe ML.

[0024] A seawater conveyance pipe 15 and a hot spring water conveyance pipe 16 are connected to the heat exchanger 12. Of these, the seawater MW discharged from the heat exchanger 12 is sent to the land-based aquaculture plant 20 via the seawater conveyance pipe 15. Then, in the mixer 30, the seawater MW is mixed with the hot spring water SW sent from the heat exchanger 12 to become the culture water AW. As shown in Fig. 4, the culture water AW is sent to the culture containers 1 in the primary water tank 21 or to a secondary culture container 23, which is relatively larger than the culture containers 1, via culture water piping 8 etc. A plurality of water injection pipes 7 are connected to the culture water piping 8. Water is injected from the tip 7a of each water injection pipe 7 into the plurality of culture containers 1 submerged in the hot spring water SW of the primary water tank 21. As shown in Figure 3, the culture water AW injected into the storage section 6 provided in the bag body 2 of the culture container 1 is used for cultivating the algae G, and then drained from the drainage hole 5 into the primary water tank 21.

[0025] The hot water DW or hot spring water SW discharged from the heat exchanger 12 is sent to the primary water tank 21 and the secondary water tank 22 via the hot spring water supply pipe 16 to become the heat-retaining water HW. The hot spring water SW may be configured to be sent directly from the hot spring 9 to the primary water tank 21 or the secondary water tank 22. The warm water HW is temporarily stored in the primary tank 21 or the secondary tank 22, and then discharged from the drainage section 24 to the outside of the primary tank 21 and the secondary tank 22 together with the culture water AW discharged from the drainage hole 5 of the culture container 1.

[0026] As described above, the culture container 1 of the embodiment includes the bag body 2 in which the culture target is placed and submerged in the primary water tank 21 (see FIG. 4), and the injection hole 3 for injecting culture water into the bag body 2. The culture container 1 also includes a plurality of drainage holes 5. The drainage holes 5 are provided in the wall surface 4 of the bag body 2 and drain the culture water AW in the bag body 2 into the water tank. The bag body 2 is made of a flexible, transparent synthetic resin. The bag body 2 of the culture container 1 submerged in the primary water tank 21 is bent and expanded by the culture water AW injected from the injection hole 3. Therefore, the culture target can be placed together with the culture water AW inside the bag body 2 that has expanded to a desired size and cultured. In addition, the culture water AW used for the culture is drained and run off through the drainage holes 5. Therefore, the conditions necessary for growth, such as appropriate water temperature, water flow, and light intensity, can be easily obtained inside the transparent bag body 2. This makes it possible to improve the productivity of the cultured object.

[0027] In detail, the land-based aquaculture plant 20 of the embodiment can heat the aquaculture water AW by mixing or heat exchange using the heat of the hot spring 9. This allows efficient use of renewable energy. When the heated culture water AW is poured into the storage section 6 formed in the bag body 2 of the culture container 1, it can generate an appropriate water flow. The bag body 2 may also be submerged in the hot spring water SW of high temperature in the primary water tank 21 (see FIG. 4). This allows the culture container 1 to be kept warm from the surroundings by the hot spring water SW. The hot spring water SW, which is obtained in relatively abundant quantities, is simply poured over and does not need to be reheated. Therefore, the culture water AW can be maintained at a desired temperature for a long period of time even without heating equipment.

[0028] Furthermore, the bag body 2 is made of a transparent synthetic resin having flexibility. Therefore, when the culture water AW is poured in, it expands, and the volume required for cultivating the algae G can be secured within the storage section 6. Furthermore, the bag body 2 is made of a transparent synthetic resin. Therefore, the storage section 6 can easily guide a desired amount of external light to the culture target contained therein. In this way, the culture container 1 of the embodiment can obtain the growth conditions required for land-based culture of aquatic organisms such as Porphyra niger G. For example, in the case of Porphyra niger G, growth conditions close to those found in the wild can be obtained, such as a water temperature of about 18°C ​​to 22°C, a water flow similar to that of waves due to stirring, and sufficient lighting.

[0029] Moreover, the culture container 1 of the embodiment is provided with a water injection pipe 7 that is inserted into the inside of the bag body 2 through the injection hole 3. The water injection pipe 7 is inserted into the inside of the bag body 2, and the culture water AW can be directly injected into the bag body 2. Specifically, the flexible bag body 2 expands and deforms when the culture water AW is poured into it. Therefore, the storage section 6 formed inside the bag body 2 has a desired volume for culture. Therefore, the culture subjects can be efficiently stored in a state suitable for growth, such as by floating them in the culture water AW.

[0030] In addition, the tip 7a of the water injection pipe 7 inserted inside the bag body 2 is extended to the middle position of the storage section 6. Therefore, the culture water AW injected from the tip 7a does not entrain air and generate air bubbles. Furthermore, the force of the injection can generate a water current that reaches every corner of the storage section 6.

[0031] Then, the culture water AW is drained from the drainage hole 5 into the primary water tank 21 in which the bag body 2 is submerged. Therefore, the culture water AW used for culture in the storage section 6 can be replaced with fresh culture water AW. Therefore, the growth conditions of the cultured subject can be reproduced in the culture container 1 with an appropriate water flow close to the natural conditions, thereby improving productivity.

[0032] Furthermore, the bag body 2 is a transparent vinyl bag, which expands and deforms when culture water AW is poured into it, forming a shape suitable for culture, with a middle part that is wider and more expanded than both ends. Specifically, as shown by the imaginary lines in Fig. 3, the bag body 2 expands to a predetermined dimension at the intermediate position between the walls 4, 4. The expanded dimension of the bag body 2 at the intermediate position is greater than the expanded dimension near each of the upper, lower, left, and right edges 2a-2d. Therefore, when the bag body 2 is inflated and deformed, the volume inside the storage section 6 is largest at the intermediate position in the upper, lower, left, and right directions. For example, as shown in FIG. 3, the shape of the storage section 6 formed inside using two wall surfaces 4, 4 that are approximately rectangular when viewed from the front can be approximately cylindrical in shape with a wide bulge in the center and a circular cross-sectional shape such as an oval or ellipse, and each end can be pointed.

[0033] Therefore, the algae G stored in the storage section 6 is less likely to remain in the narrow areas near the upper, lower, left, and right edges 2a-2d due to the water flow of the culture water AW along the curved wall surface 4. Also, in the middle part in the upper, lower, left, and right directions where the inner surfaces of the wall surfaces 4, 4 are relatively far apart, the algae G is collected in a relatively wide area, promoting the entanglement of the runners. Therefore, the algae G is less likely to form large clumps and move to the narrow areas near the edges 2a-2d. Therefore, the algae G can continue to drift due to the water flow of the culture water AW without remaining in the storage section 6.

[0034] The two walls 4, 4 constituting the transparent vinyl bag allow external light such as natural light to pass through from any of the four directions, so that natural light can be guided to the culture target contained inside the bag body 2. Moreover, the transparent bag body 2 expands and deforms most at the middle part, spreading outward and curving each wall surface 4 in a convex shape. This allows light guided from all four sides of the storage section 6 to easily reach the clumps of algae G near the middle position. This allows good lighting to be obtained, further improving the growing conditions of algae G.

[0035] For example, in the case of seaweed cultivation in the land-based cultivation plant 20, the amount of light required for growth can be easily secured, and lighting equipment is not required. Therefore, the energy required for cultivation can be further reduced. Furthermore, the bag body 2 can be folded into a compact state, so it does not take up much space when stored.

[0036] The target of aquaculture is algae such as seaweed. In its natural state, Algae Algae G attaches itself to rocky reefs about 10m deep with good wave exposure, and prefers water temperatures of around 18 to 22 degrees. The algae of P. nigricans G. have a creeping part and an upright part. Of these, the creeping part is attached to the surface of the reef. The upright part extending from the creeping part has a main axis, branches and twigs. Of these, the main axis has multiple branches extending in each direction from the upper part. Each of these branches has a dense growth of fine, hair-like, flexible twigs. In the embodiment of the land-based aquaculture plant 20, the branches having dense hair-like twigs growing from the main axis are cut off and these branches are stored through an opening provided on the upper edge 2a of the storage section 6 formed within the bag body 2 of the aquaculture container 1. The bag 2 is submerged in hot spring water SW in the primary water tank 21 (see FIG. 4) with the opening at the upper edge 2a closed and a water injection tube 7 inserted into the bag 2 from the injection hole 3. When the cultivation target is algae G, the algae G is submerged in the primary water tank 21 while floating inside the bag body 2 expanded and deformed to a desired size. Therefore, the algae G will not break apart. Therefore, by using the culture container 1 of the embodiment, in the land-based culture plant 20, the work of fastening the algae G to the rocky reef zone as in the case of the wild state is not required.

[0037] When the culture water AW delivered through the culture water piping 8 is discharged from the tip 7a of the water injection pipe 7, the bag body 2 expands and the volume of the storage section 6 increases. As a result, the culture water AW in the storage section 6 has a temperature suitable for the growth of the twigs. In addition, by using the culture container 1, the land-based culture plant 20 can obtain the necessary water flow and lighting without having to attach the twigs to rocks, and can reproduce growth conditions in the culture area that are close to those of the wild algae G. Therefore, the twigs of land-cultured Noritake algae G grow well through asexual reproduction, which steadily increases their size.

[0038] When the algae grow to a certain size in the culture vessel 1, they are separated into an upper part (new cells) and a lower part (old cells) and then cut off. Then, when the lower part of the algae has fully grown, it is either harvested or transferred to a secondary culture vessel 23 in a secondary water tank 22 (see FIG. 4) and cultured until it grows even larger. The upper part of the algae bodies continues to be cultured in the culture container 1. Basically, the culture is carried out by repeating these operations.

[0039] Furthermore, as shown in FIG. 3, in the intermediate portion of the storage portion 6 of the embodiment, the algae G gather in the center and form agglomerates, forming a relatively thick vine-like structure in which the algae are entangled with each other. This makes it harder for the algae to become damaged during growth. It also makes it easier for the algae to form many small twigs in clusters. In this manner, the culture container 1 of the embodiment can accommodate and culture the Uncaria arborescens G as a culture target in the accommodation section 6. This allows appropriate growth conditions, such as appropriate water temperature, water flow, and lighting, close to the natural conditions, to be achieved in the primary water tank 21 of the land-based culture plant 20, improving productivity.

[0040] As shown in Fig. 4, in a land-based aquaculture plant 20 using the aquaculture container 1 of the embodiment, the aquaculture water AW is heated using the heat of the hot spring water SW. This allows the aquaculture water AW injected into the bag body 2 to efficiently use the heat of the hot spring water SW, which is a renewable energy source. The heat of the hot spring water SW is more energy efficient than the case of burning fuel in a heating facility such as a boiler, and does not emit greenhouse gases. Specifically, seawater MW is pre-warmed by the heat of hot spring water SW supplied from a hot spring 9, and becomes culture water AW in the limited-capacity storage section 6 of the culture container 1. The bag body 2 of the culture container 1 is submerged in heat-retaining water HW in the primary water tank 21, and heat loss to the surroundings is suppressed, thereby retaining the heat. For example, by using hot spring water SW, which has a relatively plentiful amount of heat and can be poured over the water, as a heat source, there is no need to raise the temperature of seawater MW using heating equipment such as boilers. Therefore, the environmental load can be reduced with good energy efficiency.

[0041] In addition, in the land-based aquaculture plant 20 of the embodiment, the algae G that have grown to a certain size in the culture container 1 in the primary water tank 21 are moved to a relatively large secondary culture container 23 in the secondary water tank 22. At this time, the growth state of the algae G in the storage section 6 can be easily confirmed through the transparent wall surfaces 4, 4 of the bag body 2. Therefore, it is easy to know when to move the algae G from the culture container 1 to the secondary culture container 23 in the secondary water tank 22. The algae G moved to the secondary culture container 23 for each culture container 1 is stored and cultured in the secondary culture container 23 until harvest.

[0042] Furthermore, the primary tank 21 can use the space vacated by the movement of the culture container 1 to start culture by putting the next algae G into the culture container 1. This provides continuity to the culture and improves productivity. In addition, the land-based aquaculture plant 20 can maintain appropriate growth conditions, such as appropriate water temperature, water flow, and lighting, all year round, and there is little seasonal variation in growth conditions. Therefore, in the land-based aquaculture plant 20 of the embodiment, the algae G that have grown to a desired size can be harvested at the same intervals, and the yield of the algae G can be stabilized all year round. In this way, the culture container 1 of the embodiment can efficiently and systematically culture the algae G by utilizing the heat of the hot spring 9, which is a renewable energy source. Therefore, it is possible to exert a practically beneficial effect of being able to steadily supply good quality algae G to consumption areas while reducing production costs.

[0043] The present invention is not limited to the above-described embodiment, and various modifications are possible. The above-described embodiment is exemplified to explain the present invention in an easy-to-understand manner, and is not necessarily limited to those having all of the configurations described. In addition, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to delete a part of the configuration of each embodiment, or to add or replace other configurations. Possible modifications of the above-described embodiment are, for example, as follows.

[0044] In the culture container of this embodiment, the culture of the algae Porphyra japonica has been described. However, the present invention is not limited to this. For example, the culture of other seaweeds such as red algae, seaweed, or marine products may be used. Furthermore, if it is a marine product, it may be other fish and shellfish, marine products, or organisms such as marine products that live in fresh water or brackish water. In other words, the cultured object is not limited to those that have been cultured or are suitable for land culture, but may be those that have not been cultured on land before. Furthermore, there are no particular limitations on the type, quantity, shape, or growth stage of the cultured object.

[0045] Furthermore, the bag body 2 does not have to be a vinyl bag made of polyvinyl chloride resin as shown in the embodiment. For example, the bag body 2 may be made of other flexible synthetic resin materials such as polyethylene or polypropylene. Furthermore, the shape of the bag body 2 is not limited to the generally rectangular shape seen from the front as shown in FIG. 2, but may be other shapes such as a square, an oval, or an ellipse, and may be made of a flexible, transparent synthetic resin. Furthermore, the shape of the drainage holes 5 is not limited to a round hole, but may be, for example, a long hole, a triangle, a polygon, or the like, as long as it penetrates the wall surface 4 in both the in-plane and out-of-plane directions, and if multiple drainage holes are formed, the arrangement may be staggered or random. That is, the culture container 1 only needs to have a plurality of drainage holes 5 provided on the wall surface 4 of the bag body 2 for draining the culture water AW in the bag body 2 into the aquarium tank. Also, a translucent plastic bag may be used to adjust the light intake. In this manner, the culture container 1 is not particularly limited in terms of the material, shape, and number of the bag body 2, and the number or arrangement of the drainage holes 5 formed in the bag body 2.

[0046] In addition, in the embodiment, hot spring water SW is used as the heat source, but for example, waste heat from a biomass power plant may be used as the heat source. Also, waste heat from natural renewable energy such as a geothermal power plant may be effectively utilized. In other words, the type and form of the heat source are not limited to renewable energy derived from geothermal or hot springs, and are not particularly limited as long as they can adjust the water temperature of the culture water AW. [Explanation of symbols]

[0047] 1 aquaculture container 2 bags 3 Injection hole 4. Wall 5 Drain hole 21 Primary water tank (water tank) AW Aquaculture water

Claims

1. A bag for containing the culture target and being submerged in the aquarium; An injection hole for injecting culture water into the bag body; A drainage hole is provided on a wall surface of the bag body to drain the culture water in the bag body into the water tank, The aquaculture container is characterized in that the bag body is made of flexible, transparent synthetic resin.

2. 2. The culture container according to claim 1, further comprising a water injection pipe inserted into the bag body through the injection hole.

3. 3. The culture container according to claim 1 or 2, characterized in that the bag body is a transparent vinyl bag, which when expanded and deformed has a shape in which the middle part is wider and more bulging than both end parts.

4. 2. The culture container according to claim 1, wherein the culture object is algae.

5. 2. The culture container according to claim 1, wherein the culture water injected into the bag is pre-warmed using heat from hot spring water.

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