JP2018019614A - Eel culture system and eel culture method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To culture eel in an excellent yield.SOLUTION: In an eel culture system including a plurality of culture water tanks for storing water, water supply means for supplying water into each culture water tank, and a filter device for filtering water, as for the culture water tank, a glass eel culture water tank for culturing glass eel, a young Japanese eel culture water tank for culturing young Japanese eel, and an adult eel culture water tank for culturing adult eel are provided respectively separately, and the filter device is provided in the glass eel culture water tank, in the young Japanese eel culture water tank, and in the adult eel culture water tank, respectively.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for cultivating salmon, for example.

  Conventionally, in aquaculture, appropriate filtration has been performed to improve water quality. As one of such filtration devices, a fish water purification device using an aeration pipe or the like has been proposed (see Patent Document 1).

  This water purification apparatus for fish comprises means for coagulating organic substances dissolved in water by fine bubbles generated from an aeration tube to form bubbles containing the organic substances, and removing the bubbles containing the organic substances outside the purification apparatus. Yes. Thus, it is described that oxygen can be infused into the purified water, and organic substances generated from fish and food can be separated and removed by fine bubbles to reduce the pollution load.

  Moreover, an aquaculture pond purification apparatus has been proposed as an apparatus for purifying the aquaculture pond (see Patent Document 2). This culture pond purification device pumps up water from a culture pond that is a irrigation pond or a culture pond purification facility, mixes the water sucked from a water ejector, passes it through a water heater, and returns it to the culture pond. is there. As a result, if the initial investment is made, it is said that the aquaculture pond can be purified without any effort.

  Here, in the cultivation of salmon, the glass eels collected or purchased are put into the aquaculture pond, the glass eels are grown to obtain growth, and the growth is shipped. The growth of white eel, the initial stage of aquaculture, is the most difficult and relatively many individuals die during aquaculture. For this reason, the yield is inevitably deteriorated and the surviving salmon is cultivated.

  However, if the yield is poor, there is a problem that the ratio of the growth shipment value to the purchase price of glass eel becomes small, making it difficult to obtain profits. For this reason, it has been desired to improve the yield by reducing the mortality rate of glass eel as much as possible.

JP 7-46950 A JP 2010-267397 A

  In view of the above problems, an object of the present invention is to make it possible to cultivate salmon with a high yield.

  The present invention comprises a plurality of aquaculture tanks for storing water, water supply means for supplying water to each aquaculture tank, and a filtering device for filtering the water, wherein the aquaculture tank is a glass eel aquaculture tank for cultivating glass eels And a black eel aquaculture tank for cultivating black eel and an adult aquaculture tank for cultivating adults, respectively, and the filtering device is provided in each of the glass eel aquaculture tank, the black eel aquaculture tank, and the adult aquaculture aquarium. The present invention is characterized by an established aquaculture system and an aquaculture method using the same.

  By this invention, it is possible to cultivate salmon with a high yield.

The block diagram of a salmon culture system. Explanatory drawing explaining the structure of a glass eel culture water tank and a filtration apparatus. Explanatory drawing explaining the structure of a black eel culture water tank and a filtration apparatus. The front longitudinal section explaining the composition of the growth tank according to size, and a filtration device. The front longitudinal section explaining the composition of a large growth culture tank and a filtration device. The flowchart explaining the salmon culture method by a salmon culture system.

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

  FIG. 1 shows a configuration diagram of a salmon culture system 1. In the present embodiment, the terms glass eel, black eel, and growth are used according to the growth stage of the cocoon. When it is simply described as cocoon, it means that any stage of cocoon may be used without distinguishing between glass eel, black eel, and growth.

  The salmon culture system 1 includes a groundwater supply device 3 (water supply means) for supplying groundwater and a plurality of aquaculture tanks (10, 20, 30A, 30B, 30C, 30D, 30E, and the like) that receive groundwater from the groundwater supply device 3. 40) and filtration devices 11, 11, 31A, 31B, 31C, 31D, 31E for filtering the water stored in the respective aquaculture tanks (10, 20, 30A, 30B, 30C, 30D, 30E, 40), respectively. , 41 and a drainage device 5 for treating drainage from each of the aquaculture tanks (10, 20, 30A, 30B, 30C, 30D, 30E, 40).

  The water channels from the groundwater supply device 3 to each of the aquaculture tanks (10, 20, 30A, 30B, 30C, 30D, 30E, 40) are all divided in parallel, and each of the aquaculture tanks (10, 20, 30A) is separated from the groundwater supply device 3. , 30B, 30C, 30D, 30E, 40), groundwater is directly supplied. That is, groundwater is not supplied through other aquaculture tanks. In addition, each aquaculture tank (10, 20, 30A, 30B, 30C, 30D, 30E, 40) has its own independent filtration device 11, 11, 31A, 31B, 31C, 31D, 31E, 41. Have an independent filtration system. By these, in all aquaculture tanks (10, 20, 30A, 30B, 30C, 30D, 30E, 40), other aquaculture tanks (10, 20, 30A, 30B, 30C, 30D, 30E, 40) are not affected. An independent water environment has been realized.

  This salmon culture system 1 is installed indoors. This prevents rainwater and the like from entering the aquaculture tank (10, 20, 30A, 30B, 30C, 30D, 30E, 40) and the filtration devices 11, 11, 31A, 31B, 31C, 31D, 31E, 41. . In addition, the indoors where the salmon culture system 1 is installed are equipped with air conditioning equipment. As a result, the temperature is controlled so that the temperature suitable for the growth of the cocoon can be maintained.

  The aquaculture tank (10, 20, 30A, 30B, 30C, 30D, 30E, 40) is a glass eel aquaculture tank 10 that grows glass eels, a black eel aquaculture tank 20 that grows black eels, and a size-specific adult aquaculture It has the aquarium 30 (30A-30E) and the large sized aquaculture tank 40 which grows the growth which became large to the size which can be shipped or the size close to the size which can be shipped. The size-specific growth aquaculture tank 30 (30A to 30E) and the large-scale growth aquaculture tank 40 serve as a growth aquaculture tank for cultivating growth.

  FIGS. 2A and 2B are explanatory views for explaining the configuration of the glass eel aquaculture tank 10 and the filtration device 11, in which FIG. 2A shows a front longitudinal sectional view, and FIG. 2B shows a right side longitudinal sectional view.

  As shown in FIG. 2B, the glass eel aquaculture tank 10 has a rectangular parallelepiped container shape that is hollow inside and has an open upper surface, and has a size capable of storing an appropriate amount of water W (for example, 0.8 tons of water). Is formed. A water supply pipe 3 a for supplying new groundwater supplied from the groundwater supply device 3 (see FIG. 1) into the glass eel culture water tank 10 is provided on the upper side of the glass eel culture water tank 10. A drainage pipe 26 extending in the vertical direction is provided at the bottom of the glass eel aquaculture tank 10. The drain pipe 26 has an upper end at a position slightly lower than the edge of the upper surface of the glass eel aquaculture tank 10, and is provided with a hole 27 penetrating the bottom surface of the glass eel aquaculture tank 10 from the upper end. When the water W stored in the glass eel aquaculture tank 10 exceeds a certain amount, the water W overflows and flows into the hole 27 of the drainage pipe 26 and is drained to the drainage device 5 (see FIG. 1).

  As shown in FIG. 2 (A), the filtering device 11 is a horizontally long cubic container having a width that is the same as or slightly larger than the width of the glass eel aquaculture tank 10 and whose depth is shorter than that of the glass eel aquaculture tank 10. The top surface is released. The filtration device 11 is divided into regions so that six partitions of equal size are arranged side by side by the partition 15 (15a, 15b). The partition 15 is divided from the vicinity of the top surface of the filtration device 11 to a position slightly away from the bottom surface and forms a flow path 15c below, and a position slightly away from the water surface located at the top of the filtration device 11 A total of five lower partition portions 15b that partition from the bottom to the bottom and form a flow path 15d below are alternately arranged. By the upper partition part 15a and the lower partition part 15b, the first water storage part 14a and the second water storage part 14b are sequentially arranged from the upstream side (left in FIG. 2A) in which the water W storage space in the filtration device 11 flows. The third water reservoir 14c, the fourth water reservoir 14d, the fifth water reservoir 14e, and the sixth water reservoir 14f are partitioned.

  A filtration mat 12 made of sponge is accommodated in the first water reservoir 14a so as to cover the surface of the water W. Thereby, the water W sucked up by a suitable pump from the glass eel culture water tank 10 and supplied from the water suction port 11a is filtered.

  The 2nd water storage part 14b accommodates the filtration wool 16 comprised with the wool so that the surface of the water W may be covered. Thereby, the water W supplied from the 1st water storage part 14a through the downward flow path 15c is filtered.

  In the third water storage part 14c, a sand filter tool 18 in which a large number of pieces of cocoon (crushed sand) are packed in a net bag is accommodated so as to fill up the water surface of the third water storage part 14c. . Thereby, the water W supplied through the upper flow path 15d from the 2nd storage part 14b is filtered.

  In the fourth water reservoir 14d, a ceramic filter 19 in which a large number of cylindrical pipe-shaped ceramic filter media are packed in a net bag is accommodated so as to fill up the water surface of the fourth water reservoir 14d. ing. Thereby, the water W supplied from the 3rd storage part 14c through the downward flow path 15c is filtered.

  In the fifth water storage part 14e, a ceramic filter 22 in which a large number of cylindrical pipe-shaped ceramic filter media are packed in a net bag is accommodated so as to fill up the water surface of the fifth water storage part 14e. ing. Thereby, the water W supplied from the fourth reservoir 14d through the upper flow path 15d is filtered.

  The sixth water reservoir 14f is provided with a cylindrical drain pipe 23 that penetrates the bottom surface. The drain pipe 23 is formed so that its upper end is located in the vicinity of the water surface of the sixth water reservoir 14f. As a result, when the water W in the sixth water storage section 14f increases, the water W overflows into the drainage pipe 23, passes through the hole 24 of the drainage pipe 23, and is supplied to the glass eel aquaculture tank 10.

  With this configuration, the groundwater (water W) supplied from the water supply pipe 3 a into the glass eel culture tank 10 is stored in the glass eel culture tank 10. Water W in the glass eel aquaculture tank 10 is sucked up by a pump (not shown) and supplied from the water suction port 11a to the first water storage part 14a of the filtration device 11, and the second water storage part 14b, the third water storage part 14c, It flows in order of 4 water storage part 14d, 5th water storage part 14e, and 6th water storage part 14f. Meanwhile, the water W is filtered through the filter mat 12, the filter wool 16, the cinnabar filter 18, the ceramic filter 19, and the ceramic filter 22 in order. The water W thus filtered is supplied again into the glass eel aquaculture tank 10.

  In the glass eel aquaculture tank 10, the state of the glass eel being bred is seen, and fresh ground water is supplied from the water supply pipe 3 a and the overflowed water W is drained from the drain pipe 26. In this way, glass eels can spend their time in clean water.

  FIGS. 3A and 3B are explanatory diagrams for explaining the configuration of the black eel aquaculture tank 20 and the filtration device 11, in which FIG. 3A shows a front longitudinal sectional view and FIG. 3B shows a right side longitudinal sectional view.

  The black eel aquaculture tank 20 has a rectangular parallelepiped container shape that is hollow inside and has an open upper surface, and is formed in a size that can store an appropriate amount of water W (for example, 1 ton of water). As shown in FIG. 3B, a water supply pipe 3a for supplying new groundwater supplied from the groundwater supply device 3 (see FIG. 1) into the black eel aquaculture tank 20 is provided at the upper side of the side surface of the black eel aquaculture tank 20. It has been.

  Further, a drainage unit 29 is provided in the vicinity of the side surface inside the black eel aquaculture tank 20. The drainage unit 29 includes a cylindrical cylindrical main body portion 29b extending up and down, a mesh portion 29c formed in a cylindrical shape with a wire mesh to the same diameter below the cylindrical main body portion 29b, and the mesh portion 29c. A bottom cover 29d for closing the bottom, a mesh cover 29a formed in a disk shape by a wire mesh covering the top surface of the cylindrical main body 29b, and a horizontal eel aquaculture tank 20 extending horizontally from the side of the cylindrical main body 29b It has a drainage pipe 29e protruding from the side to the outside. In the drainage unit 29, the mesh cover portion 29a and the mesh portion 29c are made of a non-rusting material such as stainless steel and have a mesh size that does not allow passage of black eel, and other portions are made of plastic.

  In the drainage unit 29, the internal space of the cylindrical main body portion 29b and the internal space of the drainage pipe 29e communicate with each other, and water W flowing in from the mesh cover portion 29a or the mesh portion 29c is discharged from the inside of the cylindrical main body portion 29b to the drainage pipe 29e. It drains through the inside to the drainage device 5 (see FIG. 1) outside the black eel aquaculture tank 20.

  The size of the drainage unit 29 is such that the bottom cover 29d is located near the bottom of the black eel aquaculture tank 20, and the mesh cover 29a is slightly higher than the water surface of the water W in the black eel aquaculture tank 20. ing. Thereby, the dirty water usually located near the bottom of the black eel aquaculture tank 20 is drained from the mesh portion 29c, and when the water W overflows, the water W can be drained from the mesh cover portion 29a.

  A filtration device 11 is provided on the upper part of the black eel aquaculture tank 20. Since this filtration device 11 has the same configuration as the filtration device 11 provided in the upper part of the glass eel aquaculture tank 10, the same reference numerals are assigned to the same elements, and detailed description thereof is omitted. In addition, although the thing used for the glass eel culture water tank 10 and the thing used for the black eel culture water tank 20 were the same as the filtration apparatus 11, it is good not only in this but in a different structure suitably.

  FIG. 4 is a front longitudinal sectional view illustrating the configuration of the size-specific growth aquaculture tank 30 and the filtering device 31. The size-specific growth aquaculture tank (size 1) 30A to the size-specific growth aquaculture tank (size 5) 30E and the respective filtering devices 31A to 31E shown in FIG. Therefore, it will be described collectively as a size-specific growth aquaculture tank 30 and a filtration device 31.

  As shown in FIG. 4, the size-specific growth aquaculture tank 30 has a rectangular parallelepiped container shape that is hollow inside and has an open upper surface, and is formed to have a size that can store an appropriate amount of water W (for example, 1 ton of water). Has been. A water supply pipe 3 a for supplying new groundwater supplied from the groundwater supply device 3 (see FIG. 1) into the size-specific growth culture tank 30 is provided on the upper side of the size-specific growth culture tank 30.

  Further, a drainage unit 29 is provided in the vicinity of the side surface inside the size-specific growth aquaculture tank 30. Since this drainage unit 29 is the same as that provided in the black eel aquaculture tank 20, the same reference numerals are assigned to the same elements, and detailed description thereof is omitted.

  The filtration device 31 includes a cylindrical drain pipe 35, a rectangular parallelepiped flange 34 connected to one end of the drain pipe 35, and an adsorption bag 33 that covers the flange 34. The collar portion 34 is configured by a collar formed entirely in a net shape. The adsorption bag 33 is formed in a bag shape having a size that can be covered with the flange 34 by a nonwoven fabric. The drain pipe 35 is provided with a pump (not shown) inside, and discharges the water W that has passed through the adsorption bag 33 and flows into the flange 34 to the other end of the discharge pipe 35. Thus, the water W in the size-specific adult aquaculture tank 30 can be sucked, and at that time, garbage (food residue, feces, etc.) floating in the water W are adsorbed on the surface of the adsorption bag 33. . The filtration device 31 is disposed in the water W in the size-specific growth aquaculture tank 30 and floats in the water W at a height near the water surface W. For this reason, garbage can be adsorbed at each position while the position of the filtering device 31 changes.

FIG. 5 is a front longitudinal sectional view illustrating the configuration of the large-scale growth aquaculture tank 40 and the filtration device 41.
The large adult aquaculture tank 40 has a cylindrical shape with one end closed at the bottom, and has a radial diameter longer than the axial height. This large adult aquaculture tank 40 is 10 times or 20 times larger than the size-specific adult aquaculture tank 30 so that a large amount of water W (for example, 10 tons or 20 tons) can be stored. It is formed larger than any of the black eel aquaculture tank 20 and the size-specific adult aquaculture tank 30.

  The large growth culture tank 40 is provided with a water supply pipe 3a for supplying new groundwater supplied from the groundwater supply device 3 (see FIG. 1) into the large growth culture tank 40. In addition, a drain pipe 49 extending in the vertical direction is provided at the bottom of the large growth culture tank 40. The drain pipe 49 has an upper end at a position slightly lower than the edge of the upper surface of the large adult aquaculture tank 40, and has a hole (not shown) penetrating from the upper end to the bottom surface of the large adult aquaculture tank 40. ing. When the amount of water W stored in the large growth culture tank 40 exceeds a certain amount, the water W overflows and flows into the hole of the drain pipe 49 and is drained to the drain device 5 (see FIG. 1).

  In addition, on the side peripheral surface of the large growth aquaculture tank 40, a drain pipe 51 for draining the water W stored in the large growth aquaculture tank 40 to the upper unit 54 of the aeration tank 50, and a lower unit of the aeration tank 50 A water supply pipe 52 is provided for supplying the filtered water W from 55 to the large growth culture tank 40.

  The aeration tank 50 is a tank in which air is brought into contact with water and air. The water W that has flowed in from the large adult aquaculture tank 40 is aerated in the aeration tank 50, and flows out to the nitrification tank 60 through the flow path 56 and the flow path 61 by the circulation pump 58.

  The nitrification tank 60 has a cylindrical shape with a bottom and a container shape that stores water W therein. The nitrification tank 60 is provided with an aeration diffuser pipe 63 therein. The aeration diffuser pipe 63 is formed in a ring shape having a size slightly smaller than the bottom circular shape. The aeration diffuser 63 sends air into the water W. The nitrification tank 60 is filled with a plurality of fluid filter media 65. The fluid filter medium 65 is formed by a microfiber in a shape in which a partition plate having a cross section in the radial direction is provided inside the cylindrical shape. This fluid filter medium 65 has the property of adsorbing bacteria. By the action of this bacterium, harmful ammonia is changed to nitrous acid or nitric acid. In addition, it is preferable to irradiate far-infrared rays to the fluid filter medium 65 with an appropriate far-infrared ray irradiation device. Thereby, decomposition | disassembly of ammonia by bacteria is accelerated | stimulated.

  The nitrification tank 60 is provided with a drain pipe 67. Water W in the nitrification tank 60 is supplied to the denitrification tank 70 by the drain pipe 67.

  The denitrification tank 70 has a cylindrical shape with a bottom and a container shape that stores water W therein. The denitrification tank 70 is provided with an aeration diffuser pipe 73 therein. The aeration air diffuser 73 is formed in a ring shape having a slightly smaller size than the bottom circular shape. The aeration air diffuser 73 sends air into the water W. The denitrification tank 73 is charged with a plurality of fluid filter media 75. The fluid filter medium 75 is formed by a microfiber in a shape in which a partition plate having a cross section in the radial direction is provided inside the cylindrical shape. This fluid filter medium 75 has the property of adsorbing bacteria. By the action of this bacterium, harmful nitric acid is decomposed into harmless nitrogen and water. In addition, it is preferable to irradiate far-infrared rays to the fluid filter medium 75 with an appropriate far-infrared ray irradiation device. This promotes the decomposition of nitric acid and nitrous acid by bacteria.

  The denitrification tank 70 is provided with a stirring propeller 71. The agitation propeller 1 is rotated by a drive motor (not shown) to agitate the stored water.

  The denitrification tank 70 is provided with an organic replenishment 78 used for replenishing the organic matter.

  A drain pipe 83 that supplies water flowing out from the denitrification tank 70 to the nanobubble generator 80 is connected downstream of the denitrification tank 70.

  The nanobubble generator 80 stores water in an active tank, and generates a nanobubble that is a bubble having a diameter of several hundred nm or less so as to be immersed in the water in the active tank, and An activator for activating the water is provided. The activator is composed of an appropriate carrier that immobilizes and propagates microorganisms, such as polyvinylidene chloride filler or activated carbon. Thereby, the nanobubble generator 80 can activate water while generating nanobubbles. The nanobubble generator 80 may be a micro / nano bubble generator using a micro / nano bubble generator that generates micro / nano bubbles (micro bubbles and nano bubbles) of about 10 μm to several hundred nm.

  The activated water including the nanobubbles is supplied to the aeration tank 50 disposed downstream by the drain pipe 53.

  In the aeration tank 50, when water and air are brought into contact with this water, the water is returned to the large growth culture tank 40 in a state where oxygen is further supplied to the water.

  The aeration tank 50, the nitrification tank 60, the denitrification tank 70, and the nanobubble generator 80 constitute a filtration device 41.

  FIG. 6 is a flowchart for explaining the flow of a culling culture method for cultivating cocoons by the culling culture system 1.

  First, the received glass eel is discharged into the glass eel aquaculture tank 10 (see FIG. 2), and reared in the glass eel aquaculture tank 10 (step S1). In the breeding in the glass eel aquaculture tank 10, the condition of the glass eel is seen and poured (water is introduced, and the same amount of water is discharged from the glass eel aquaculture tank 10), and the filtration device 11 always performs filtration. . In this glass eel stage, the feed of biological system such as plankton is given as the first feed. This biological feed can be live, dead, or a mixture of these. Further, the biological food may be one type or plural types. In the case of using a plurality of kinds, it is preferable to give the smaller bait when the glass eel is small and the larger bait after the glass eel grows a little. Specifically, for the first two weeks or so, feed the smaller biological feed, and then change the feed to the next larger biological feed over a period of about two weeks. Switch completely in about a month. Furthermore, after one month, gradually switch to kneaded food.

Until the glass eel grows to become a black eel (step S2: No), the breeding in the glass eel aquaculture tank 10 is continued. The breeding period in the glass eel aquaculture tank 10 is about 3 months for glass eels.
When the glass eel grows to become a black eel (step S2: Yes), the water in the glass eel aquaculture tank 10 is partially drained and reduced, and the black eel is transferred to the black eel aquaculture tank 20 (see FIG. 3). Switch to breeding (step S3). In breeding in the black eel aquaculture tank 20, the state of the black eel is seen and poured, and the filtration device 11 always performs filtration. In this stage of black eel, we will feed as food.

Until the black eel grows and grows (step S4: No), the breeding in the black eel aquaculture tank 20 is continued. The breeding period in the black eel culture tank 20 is about three months for the black eel.
When the black eel grows and grows (step S4: Yes), a part of the water of the black eel aquaculture tank 20 is drained and reduced, and the growth is reduced to the minimum size in the growth aquaculture tank 30 by size (see FIG. 4). The size is shifted to the size-specific growth aquaculture tank (size 1) 30A for rearing, and switched to the size-specific growth aquaculture tank 30 (step S5). In breeding in the size-specific growth tank 30, the growth is carried out by looking at the growth state, and the filtration device 31 always performs filtration. At this stage of growth, food is fed as food.

  Until the selection timing is reached (step S6: No), the breeding is continued in the size-specific growth aquaculture tank 30. When the selection timing is reached (step S6: Yes), the size-specific growth culture tank 30 is reduced in water and grown. Are selected according to size (step S7), and are categorized and raised according to size in five water tanks of size-specific adult aquaculture tank (size 1) 30A to size-specific adult aquaculture tank (size 5) 30E. In addition, it is good to make it the appropriate number which can be divided into sizes, such as not only five but three, according to size. The total period of breeding by size in the plurality of size-specific growth aquaculture tanks 30 is about 3 to 6 months for growth.

  When the breeding that has been bred grows to a size suitable for entering the large-scale growth aquaculture tank 50 (step S8: Yes), the water in the size-specific growth aquaculture tank (size 5) 30E is partially drained and reduced. Then, the growth that has grown to that size is transferred to the large growth culture tank 50 and switched to breeding in the large growth culture tank 50 (step S9). In rearing in the large adult aquaculture tank 50, aeration in the aeration tank 50, decomposition and aeration of ammonia in the nitrification tank 60, decomposition and aeration of nitric acid and nitrous acid in the denitrification tank 70, and supply and activity of nanobubbles by the nanobubble generator 80 Do. This makes it possible to cultivate without changing water over a longer period than the white eel aquaculture tank 10, the black eel aquaculture tank 20, and the size-specific adult aquaculture tank 30.

  That is, the large adult aquaculture tank 40 is configured to be 5 times or more, preferably 10 times or more compared to each size of the glass eel aquaculture tank 10, the black eel aquaculture tank 20, and the size-specific adult aquaculture tank 30. It is also difficult to drain water. Thus, the culture | cultivation operation | work is made easy by raising the grade which filters in the large sized growth culture water tank 40. FIG.

Until the growth in the large growth aquaculture tank 40 becomes ready for shipment (step S10: No), the breeding in the large growth aquaculture tank 40 described above is continued.
When the growth grows to a state ready for shipment (step S10: Yes), the growth that has become ready for shipment is taken out from the large-scale growth aquaculture tank 40 according to the number of orders and shipped (step S11).

  By the above configuration and method, the salmon can be cultivated with a high yield. In detail, in the conventional aquaculture, a part of the salmon died before the white eels were received, reared and shipped as adults, reducing to 40-50% of the original quantity. . On the other hand, at least 70% and on average 75% of the original quantity can be grown and shipped by breeding by the above-described method using the straw culture system 1. it can.

  In some of the breeding processes, biological food is used, so that food residue is less likely to remain compared to pasteurized food, and the cleanliness of water can be increased. In particular, the use of biological food in the glass eel farming process can reduce the mortality in the state of the glass eel, which is the weakest and most likely to die.

  In addition, the tanks are divided according to the growth stage, and only close-sized moths are bred in each tank, so that the large moths eat too much food and the small moths eat less food. Can be prevented. As a result, it is possible to prevent a small rice cake from being eaten for a long time without being eaten and to grow slowly, and any rice cake can be grown on average.

  Also, glass eel aquaculture tank 10, black eel aquaculture tank 20, size-specific adult aquaculture tank (size 1) 30A, size-specific adult aquaculture tank (size 2) 30B, size-specific adult aquaculture tank (size 3) 30C, and size A growth aquaculture tank (size 4) 30D, a size-specific growth aquaculture tank (size 5) 30E, and a large growth aquaculture tank 40 are provided separately, and groundwater is supplied to each of these tanks from the groundwater supply device 3 Directly and individually, the filtration devices 11, 11, 31A, 31B, 31C, 31D, 31E, and 41 are also provided independently for each water tank. For this reason, the breeding environment which became independent for every water tank is realizable, without the water of each water tank mixing each other. As a result, for example, even if a disease occurs in a certain tank, it is only affected by the tank, and it is possible to prevent the disease from being transmitted to other tanks. In other words, even if a disease that leads to the annihilation of moths or a situation where staphylococci that lead to the annihilation of moths occurs, only the aquarium is annihilated, and the moths of all the aquariums are annihilated. There is nothing. Therefore, damage at the time of problem occurrence can be minimized.

  Further, only the large growth culture water tank 40 is provided with all of the nitrification tank 60, the denitrification tank 70, and the nanobubble generator 80. As a result, the large growth culture tank 40 that is difficult to replace water keeps the water clean by taking advantage of the action of bacteria, and the other aquaculture tanks use cheaper filtration main guns. It is possible to solve the conflicting problem of improving the yield of cocoons.

  Further, by changing the configuration of the filtration devices 11, 31, and 41 for each water tank according to the growth stage of the koji, appropriate filtration can be performed without incurring unnecessary costs.

  In addition, in the filtration devices 11, 21, 31A, 31B, 31C, 31D, 31E, and 41, bacteria were used by using the ceramic filter tools 19 and 22 and the flow filter media 65 and 75 using appropriate filter media. Water can be filtered, and ammonia can be decomposed to raise cocoons with clean water.

  In addition, by using the nanobubble generator 80 that supplies nanobubbles and activates water, it is possible to improve the bite of the salmon feed and promote the growth of the salmon and maintain health.

  In addition, by temperature control, the temperature of the aquaculture tank (10, 20, 30A, 30B, 30C, 30D, 30E, 40) can be kept constant, and the feeding of the salmon feed is improved for breeding Can grow cocoons in an optimal environment.

The present invention is not limited to this embodiment, and can be various other embodiments.
For example, although the nitrification tank 60 and the denitrification tank 70 are configured separately, the present invention is not limited to this, and a nitrification and denitrification tank in which one tank has functions of nitrification and denitrification may be used. In this case, the same effect can be obtained.

  Moreover, it is good also as a structure which installs the filtration apparatus 11 also in the growth tank 30 according to size, and uses the filtration apparatus 11 while managing by classification even if it becomes a growth. In this case, water can be filtered more effectively.

  Moreover, although the temperature was adjusted by indoor air conditioning, the temperature is not limited to this, and the aquaculture tank (10, 20, 30A, 30B, 30C, 30D, 30E, 40) is provided with a temperature control device such as a heater. You may enable it to manage temperature separately. Even in this case, it is possible to promote the growth of the cocoon by maintaining an appropriate temperature.

  In addition, five growth tanks 30 (30A to 30E) according to size are provided, and the growth until growing to a size close to shipment is raised according to five sizes. Or 3 stages, such as 3 stages, etc. Even in this case, it is possible to prevent the growth of small growths from growing indefinitely only when the growth has grown, and to grow equally.

  The present invention can be used for cultivation of salmon.

DESCRIPTION OF SYMBOLS 1 ... Coral culture system 3 ... Groundwater supply apparatus 10 ... Glass eel culture tank 10, 20, 30A, 30B, 30C, 30D, 30E, 40 ... Culture tank 11, 21, 31A, 31B, 31C, 31D, 31E, 41 ... Filtration Apparatus 12 ... Filtration mat 16 ... Filter wool 18 ... Sand filter 19, 22 ... Ceramic filter 20 ... Black eel aquaculture tank 30 (30A-30E) ... Size-specific growth aquaculture tank 33 ... Adsorption bag 40 ... Large growth Aquaculture tank 60 ... Nitrification tank 70 ... Denitrification tank 80 ... Nano bubble generator

Claims (8)

Multiple aquariums for storing water,
Water supply means for supplying water to each aquaculture tank;
A filtration device for filtering the water,
The aquaculture tank is
Glass eel aquaculture tank to cultivate glass eel,
A black eel aquaculture tank to cultivate black eel,
There is a separate aquaculture tank to cultivate growth,
The filtration apparatus is a salmon aquaculture system provided in each of the glass eel aquaculture tank, the black eel aquaculture tank, and the adult aquaculture tank. The adult aquaculture tank is
At least three different size aquaculture aquaculture tanks that are cultivated in at least three stages according to the size of the growing straw;
The culturing system according to claim 1, further comprising a large cultivating aquaculture tank for culturing growing cultivated to a predetermined size. The glass eel aquaculture tank is
As the filtration device, a filtration mat composed of sponge, a filtration wool composed of wool, a cinnabar filtration tool in which a large number of pieces of cocoon (silica sand) are packed in a net bag, and a cylindrical pipe-shaped filter Comprising at least one ceramic filter stuffed with a large number of ceramic filter media in a mesh bag;
The large adult aquaculture tank is
The salmon culture system of Claim 2 provided with the nitrification tank which decomposes | disassembles ammonia, the denitrification tank which decomposes | disassembles nitric acid and nitrous acid, and the nano bubble generator which generates a nano bubble. The size-specific growth aquaculture tanks are:
As the filtration device, comprising an adsorption bag formed of non-woven fabric and a pump for supplying water inside thereof,
The salmon culture system according to claim 3, wherein the pump attaches garbage to the surface of the adsorption bag that is a nonwoven fabric by supplying water. 5. The straw culture system according to claim 4, wherein the glass eel aquaculture tank, the black eel aquaculture tank, and the size-specific growth aquaculture tank are formed to have a water storage size of 1/5 or less of the large-scale growth aquaculture tank. . A water supply path from the water supply means to the plurality of the aquaculture tanks is formed in parallel, and water is independently supplied to the aquaculture tanks, respectively.
The filtration device is provided independently and individually in each of the plurality of aquaculture tanks,
The salmon farming system according to any one of claims 1 to 5, wherein the aquaculture system is configured as a separate and independent water environment in which the water environments of the respective aquaculture tanks do not affect each other. A salmon culture method for cultivating salmon using the salmon culture system according to any one of claims 1 to 6,
A salmon culture method for raising glass eels using biological feed in the glass eel aquaculture tank. The aquaculture method according to claim 7, wherein the aquarium is reared according to the size of the culm, and is reared by selecting the size so that only one stub of a similar size exists in one aquarium.

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