JP2019180374A - Eel culture facility - Google Patents

Abstract

To provide an eel culture facility capable of improving remarkably eel culture yield from white eel to eel adult fish.SOLUTION: An eel culture facility is provided with rectangular breeding ponds 13, 14, 15, 16 formed so that breeding water flows from one end side to the other end side facing thereto, a drainage channel 17 provided with pumps 31, 32 for supplying breeding water flowing out from the breeding ponds to filter devices 11, 12, an oxygen bubble supply device 4 for supplying oxygen bubbles to the breeding water cleaned by the filter devices 11, 12, and a breeding water supply pipe 41 for supplying the breeding water to which oxygen bubbles are supplied to one end side of the breeding ponds 13, 14, 15, 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sericulture equipment, and more particularly to a sericulture equipment that can significantly improve breeding efficiency and, as a result, can significantly reduce fuel costs and electricity charges.

  The breeding pond used in conventional sericulture equipment is circular or substantially square, and the breeding water is circulated as a whole by a plurality of aeration turbines floated on the surface of the breeding water. As a result, a slow flow of breeding water is formed in the breeding pond by the aeration turbine, and at the same time, breeding water containing air generated by the aeration turbine is distributed in the breeding pond, and excrement etc. is collected at the center of the vortex. It was discharged out of the breeding pond from here. Patent Document 1 discloses a structure of an aeration turbine improved for such a purpose.

JP2009-214054

  However, the conventional sericulture equipment using an aeration turbine has not been able to realize sufficient breeding efficiency, and it has been difficult to significantly reduce fuel costs and electricity charges.

  Then, this invention solves such a subject and it aims at providing the sericulture equipment which can improve breeding efficiency drastically.

  In order to achieve the above object, according to the first aspect of the present invention, a rectangular breeding pond (13 to 16) in which breeding water flows from one end side to the other end opposite thereto, and breeding water that has flowed out of the breeding pond. A first flow path (17) for supplying water to the filtration device (11, 12), an oxygen bubble supply device (4) for supplying oxygen bubbles to breeding water purified by the filtration device (11, 12), and an oxygen bubble And a second flow path (41) for supplying the breeding water supplied to the one end side of the breeding pond (13 to 16).

  According to the first aspect of the present invention, oxygen bubbles are supplied from the oxygen bubble supply device to the breeding water instead of the aeration turbine, and particularly when oxygen nanobubbles are used as the oxygen bubbles, the dissolved oxygen concentration of the breeding water can be greatly improved. it can. And by flowing such breeding water from one end side to the other end side of the breeding pond, the flow becomes uniform and stable throughout the breeding pond, and the breeding density is increased to about five times the conventional density. Can do. As a result, the breeding efficiency is improved, and as a result, the fuel cost for raising the breeding water necessary for aquaculture per rabbit can be greatly reduced. In addition, it is possible to grow up to mature fish with sufficient yield, such as poorly grown eels that have been discarded because it is difficult to cultivate to adult fish, so-called Japanese eels, or a mixture of poorly grown eels grown in different environments or different species is there. Furthermore, pelletized bait can be used because it is not washed away by the strong water flow as in the case of using an aeration turbine, and the burden of bait management, bait making, and feeding work is greatly reduced.

  In this 2nd invention, the said filtration apparatus (11,12) is provided in the position where the water level is the highest, and the pump (31,32) which supplies breeding water from the 1st flow path (17) to the said filtration apparatus (11,12). ), And sequentially lower the water level so that the breeding water naturally flows from the filtration device (11, 12) toward the oxygen bubble supply device (4) and the breeding pond (13-16).

  According to the second aspect of the present invention, since the breeding water is allowed to flow naturally from the filtration device to the breeding pond through the oxygen bubble supply device, it is possible to reduce the number of installed pumps and save space. Electricity cost required for aquaculture can be reduced.

  In the third aspect of the invention, the breeding ponds (13 to 16) are partitioned by a partition wall (18) whose work path is on the wall.

  In the third aspect of the invention, since the work passage is formed on the partition wall that partitions the breeding pond, breeding work can be performed efficiently.

  In this 4th invention, the said breeding pond (13-16) is a rectangle, and the width | variety is set to the dimension that work tools can reach to the breeding pond center from each work channel | path (18) located in the said width direction. ing.

  In this 4th invention, since it is possible to make work tools reach the breeding pond center from the work path, breeding work can be performed efficiently.

  In the fifth aspect of the present invention, the breeding pond (13 to 16) has the bottom of the pond inclined downward as a whole, and has a dredging hole (52) for sucking and collecting the salmon at the lowest part of the pond bottom. Is provided

  In this 5th invention, the collection | recovery operation | work of the cage | basket from a breeding pond can be performed efficiently.

  In the sixth invention, a plurality of the breeding ponds (13 to 16) are provided adjacent to each other.

  In the sixth invention, the entire sericulture facility can be made compact, and the same level can be sorted into each breeding pond according to the growth difference of the juvenile fish. Can be prevented, thereby improving the yield of the aquaculture.

  The reference numerals in the parentheses refer to the correspondence with specific means described in the embodiments described later.

  As described above, according to the present invention, the breeding efficiency of pupae can be dramatically improved, so that the fuel costs and electricity charges for breeding water heating necessary for culturing per pup are greatly reduced. can do.

It is a principal part top view of the sericulture equipment which shows one Embodiment of this invention. FIG. 2 is a vertical sectional view taken along line II-II in FIG. 1.

  The embodiment described below is merely an example, and various design improvements made by those skilled in the art without departing from the gist of the present invention are also included in the scope of the present invention.

  FIG. 1 shows a plan view of the main part of the sericulture equipment. The entire sericulture facility is provided at a position slightly lower than the ground surface, and can easily be performed without going up and down each work necessary for eel farming described later. The sericulture equipment has plane areas 1A and 1B each composed of a plurality of rectangular (rectangular) areas 11 to 16 which are partitioned so as to be in contact with each other. In the present embodiment, a pair of plane regions 1A and 1B are provided symmetrically. The pair of planar regions 1A and 1B are partitioned by a drainage channel 17 that is a relatively wide first channel, and a beam 171 (FIG. 2) is provided in the upper opening of the drainage channel 17. It can be used as a work path.

  Each of the rectangular regions 11 to 16 in the planar regions 1A and 1B is partitioned by a relatively narrow partition 18 and a work passage is formed on the partition 18. Filtration devices 21 and 22 are accommodated in the two regions 11 and 12 at the ends of the rectangular regions of the planar regions 1A and 1B. The remaining rectangular regions 13 to 16 are formed as rectangles narrower than the rectangular regions 11 and 12 and serve as breeding ponds.

  A pair of pumps 31 and 32 for pumping the breeding water from the drainage channel 17 are installed on the inlet side of the filtration device 21, and the water level on the inlet side of the filtration device 21 is the highest, and then toward the drainage channel 17 having the lowest water level. As will be described later, the breeding water flows down naturally. The pumps 31 and 32 are not necessarily provided as a pair, and may be a single unit.

  For example, a biological filtration device can be used as the filtration device. The two filtration devices 21 and 22 are connected in series, and the breeding water contaminated with excrement and the like is circulated from one filtration device 21 to the other filtration device 22 and purified as shown by the arrow in FIG. . The oxygen bubble supply device 4 is connected to the outlet side of the filtration device 22, and here, the oxygen supplied from the oxygen generator (not shown) is mixed with the breeding water flowing out from the filtration device 22 in the form of nanobubbles. The

  From the oxygen bubble supply device 4, a breeding water supply pipe 41 serving as a second flow path is bent toward the outer end (one end) of the breeding pond 13 and extends so as to connect the outer ends of the breeding ponds 13 to 16. In the breeding water supply pipe 41, a feed port 411 with an opening / closing valve is opened at a substantially central position of each breeding pond 13-16.

  The rectangular width of each of the breeding ponds 13 to 16 is set to such a size that tools used for various operations from the respective work paths 18 in the width direction that divide these breeding ponds can easily reach the center of the breeding pond. In addition, the pond bottom of each breeding pond 13-16 is made to incline and descend toward the inner side end (other end) from the longitudinal direction, ie, the outer end (one end), as shown in FIG.

  In addition, the inner end portion of the pond bottom of each breeding pond 13 to 16 communicates with a drain port 51 for draining the breeding water and a suction pipe 53 for sucking the culm collected at the inner end portion. A punching hole 52 is provided. Further, in order to keep the water level of the breeding pond at a predetermined height, a U-shaped drain pipe 54 is provided that allows the inner ends of the breeding ponds 13 to 16 and the drainage channel 17 to communicate with each other below the partition wall. That is, a slit 543 for allowing the breeding water to flow is formed in the pipe wall of the breeding pond side standing pipe 541 (FIG. 2) of the drain pipe 54, while the breeding water is placed in the drainage channel side standing pipe 542 at a predetermined height position. A drain outlet 544 is provided to keep the water level of the breeding pond at a predetermined height.

  In the sericulture equipment configured as described above, the breeding water pumped up by the pumps 31 and 32 to the inlet side of the filtration device 21 is connected from the filtration device 21 in series to the filtration device 22 as indicated by the arrow in FIG. And flows into the oxygen bubble supply device 4. The breeding water having a high oxygen concentration while passing through the oxygen bubble supply device 4 is supplied from the supply ports 411 to the breeding ponds 13 to 16 through the supply pipe 41. And as shown by the arrow of FIG. 2, it flows along the longitudinal direction of the said breeding ponds 13-16 from the outer side edge to the inner side edge of the breeding ponds 13-16, flows out into the drainage channel 17 through the drainage pipe 54, and drainage channel It flows in the direction of one end of 17 and is pumped up by pumps 31 and 32 again. In this way, the breeding water is circulated.

  According to this embodiment, after pumping up with the pumps 31 and 32, the circulation of the breeding water from the filtration devices 21 and 22 to the oxygen bubble supply device 4 and the breeding ponds 13 to 16 is carried out by decreasing the water level sequentially. Therefore, the pumps 31 and 32 need only be installed at the circulation start position, and the installation space for the entire sericulture equipment and the necessary electricity bill can be greatly reduced.

  In addition, since the plurality of rectangular breeding ponds 13 to 16 are partitioned by the working passage 18 and provided adjacent to each other, the placement efficiency of the breeding ponds is good, and the capacity of each breeding pond 13 to 16 is made appropriate. If this is the case, it is possible to prevent cannibalism and insufficient food intake of relatively small juveniles by sorting the same grades into each breeding pond according to the growth difference of juveniles, thereby improving the cultivation yield. Can do.

  In this case, observation and sorting in the breeding pond can be easily and efficiently performed on the work path 18 that partitions the breeding ponds 13 to 16. In particular, since the breeding ponds 13 to 16 are rectangular and the width thereof is set so that tools used for work can easily reach the center of the breeding pond, more efficient work is possible.

  Each breeding pond 13-16 is supplied with breeding water in which high concentration of oxygen higher than the natural oxygen saturation concentration is dissolved by oxygen nanobubbles, so raising the breeding density of glass eel more than five times It is possible, and the fuel cost for heating the breeding pond per eel and the electricity bill can be greatly reduced.

  In the said embodiment, the filtration apparatuses 21 and 22 are installed in the one end part of planar area | region 1A, 1B, and the several breeding ponds 13-16 are arrange | positioned from this to the other end direction by making each rectangular long side adjoin each other from now on. However, arrangement | positioning of the filtration apparatuses 21 and 22 and the breeding ponds 13-16 is not restricted to this. For example, you may make it arrange | position several breeding ponds so that a filtration apparatus may be enclosed. The number of breeding ponds is not limited to the above embodiment.

  In the said embodiment, of course, the installation number of the filtration apparatuses 21 and 22 is not restricted to a pair. Further, when the filtration device is a biological filtration device, an oxygen bubble supply device may also be provided on the inflow side thereof to supply sufficient oxygen to the microorganisms in the filtration device.

DESCRIPTION OF SYMBOLS 1A, 1B ... Plane area | region, 13, 14, 15, 16 ... Breeding pond, 17 ... Drainage channel (1st flow path), 18 ... Partition, 21,22 ... Filtration apparatus, 31, 32 ... Pump, 4 ... Oxygen bubble Supply device, 41 ... breeding water supply pipe (second flow path), 52 ... punching hole.

Claims (6)

A rectangular breeding pond that allows breeding water to flow from one end to the other end, a first flow path for feeding the breeding water flowing out of the breeding pond to the filtration device, and breeding purified by the filtration device An sericulture facility provided with an oxygen bubble supply device for supplying oxygen bubbles to water, and a second flow path for supplying breeding water supplied with oxygen bubbles to the one end side of the breeding pond. The filtration device is provided at the highest water level and a pump is provided for supplying breeding water from the first flow path to the filtration device. The breeding water is naturally directed from the filtration device to the oxygen bubble supply device and the breeding pond. The sericulture equipment according to claim 1, wherein the water level is gradually lowered so as to flow down. The sericulture facility according to claim 1 or 2, wherein the breeding pond is partitioned by a partition wall having a work passage on the wall. The sericulture equipment according to claim 3, wherein the breeding pond has a rectangular shape, and the width of the breeding pond is set such that work tools can reach the center of the breeding pond from each work passage located in the width direction. 5. The breeding pond according to claim 1, wherein the bottom of the breeding pond is inclined downward as a whole, and a dredging hole is provided at the lowest part of the pond bottom for sucking and collecting the straw from the breeding pond. Sericulture equipment. The sericulture equipment according to any one of claims 1 to 5, wherein a plurality of the breeding ponds are provided adjacent to each other.