JP3944213B2 - Seafood rearing device and foreign matter removing method - Google Patents

Description

  The present invention relates to a seafood rearing apparatus and a foreign matter removing method for rearing seafood in a rearing aquarium.

  When seafood is cultivated in a breeding aquarium or temporarily cultivated, it is circulated while purifying the breeding water in the breeding aquarium. And since fish and shellfish are generally bred in a breeding aquarium, foreign foods such as husks tend to accumulate in the breeding aquarium when residual food or shrimp are bred. Cause it to occur. For this reason, it is necessary to remove such foreign matters from the breeding aquarium. Currently, every day, diving work is performed to collect and remove foreign matters by human power. However, this is a so-called 3K operation, and labor costs are increased. .

Therefore, it has been attempted to cause water to flow in the breeding tank by discharging water from the nozzle to the breeding tank, and to remove foreign substances in the breeding tank automatically by using this water flow without human power. (See, for example, Patent Document 1).
JP-A-8-47354

  However, it is not possible to concentrate and capture the foreign matter only by causing a water flow in the breeding aquarium to allow the foreign matter to flow in the water, and there is a problem in the efficiency of removing the foreign matter in the water.

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a seafood breeding apparatus and a foreign matter removal method capable of efficiently capturing and removing foreign matters such as underwater bait and molting shells. It is what.

The fish and shellfish breeding apparatus according to claim 1 of the present invention is provided with a plurality of nozzles 2 for generating a water flow in the breeding aquarium 1 by the discharged water in the breeding aquarium 1 where the fish and shellfish are bred. 2 are arranged at predetermined intervals along the direction of the water flow, and the foreign matter is reared in the foreign matter collecting point 3 where the foreign matter moved in the breeding water tank 1 by the water flow discharged from each nozzle 2 gathers by eddy current. A foreign matter removing device 4 for removing from the water tank 1 is provided.

The invention of claim 1 comprises a conveying device 45 with draining function of conveying exuviae seafood a foreign material removed in the foreign substance removing device 4, the filter media 47 to be fluidized, carried by the transport device 45 A molting shell dissolving tank 48 for dissolving the molting shell in water, and an outflow passage 49 for returning water in which the molting shell is dissolved from the molting shell dissolving tank 48 to the breeding aquarium 1. Is.

The invention of claim 2 is characterized in that, in claim 1 , a crushing device 50 is provided for crushing the molting shell put into the molting shell dissolution tank 48.

The foreign matter removing method in the seafood breeding apparatus according to claim 3 of the present invention is provided with a plurality of nozzles 2 for generating a water flow in the breeding aquarium 1 by the discharged water in the breeding aquarium 1 where the seafood is raised. At the same time, the nozzles 2 are arranged at predetermined intervals along the direction of the water flow, and the foreign matter collected in the water tank 1 moved in the breeding aquarium 1 by the water flow discharged from the nozzles 2 is collected in the foreign matter collecting point. A fish and shellfish breeding device comprising a foreign matter removing device 4 for removing foreign matter from the breeding aquarium 1 is used , and a plurality of nozzles 2 are arranged in order from the upstream nozzle 2 to the downstream nozzle 2 for a predetermined time. By performing the discharge operation every time, the foreign matter in the water is sequentially moved in the breeding tank 1 by the water flow discharged from each nozzle 2, and the foreign matter that has reached the foreign matter collecting point 3 is removed from the breeding tank 1 by the foreign matter removing device 4. To do The one in which the features.
According to a fourth aspect of the present invention, in the third aspect, the seafood breeding device is fluidized with a transporter 45 having a draining function for transporting the molting shells of the seafood that is a foreign matter removed by the foreign matter removing device 4. An unsealing shell dissolution tank 48 that is provided with a filter medium 47 and that dissolves the unhulled shell introduced from the transport device 45 into the water, and an outflow passage 49 that returns water in which the unhulling shell is dissolved from the unhulling shell dissolution tank 48 to the breeding aquarium 1. It is characterized by comprising.
The invention of claim 5 is characterized in that, in claim 4, the fish and shellfish breeding apparatus comprises a crushing device 50 for crushing the molting shells put into the molting shell dissolution tank 48.

According to a sixth aspect of the present invention, in any one of the third to fifth aspects , a plurality of nozzles 2 are formed from a plurality of sets of nozzles 2, and the nozzle 2 positioned at the most upstream of the water flow in each set is used as a reference. The nozzles 2 of each set are discharged at predetermined time intervals in order from the upstream set to the downstream set.

  According to the present invention, by discharging water from the plurality of nozzles 2 provided in the breeding aquarium 1, foreign substances in the water are sequentially moved in the breeding aquarium 1 and collected in the foreign substance collection point 3. The collected foreign matter can be efficiently captured by the foreign matter removing device 4 and removed to the outside of the breeding water tank 1.

  Hereinafter, the best mode for carrying out the present invention will be described.

  The breeding aquarium 1 is formed in a long and narrow rectangular shape as shown in FIG. 1, and both end portions thereof are formed in a semicircular shape. And as shown in FIG. 2, the bottom of the breeding water tank 1 is made into the double bottom structure with the water flow partition plate 10 by arrange | positioning the water flow divider 10 over the whole surface in the bottom part of the breeding water tank 1. A breeding room 11 is formed above the water partition plate 10 and a water supply chamber 12 is formed below the water flow partition plate 10. The water flow partition plate 10 is formed so that water can freely pass through, such as a grid-like plate, and a mesh sheet 13 of a mesh that does not allow sandy substances to pass through is laid on the water flow partition plate 10, and on that. A sandy material layer 14 is formed by spreading a sandy material. In addition, what was formed by the grating made from FRP which consists of a 40 mm square grating | lattice can be used for the water flow partition plate 10, for example, and the mesh sheet | seat 13 uses what was formed by the net | network of a 1.5 mm square grid, for example. be able to. The thickness of the sand-like substance layer 14 is about 10 to 30 cm, particularly preferably about 10 to 15 cm, so that fish and shellfish such as prawns can be submerged. As the sandy substance forming the sandy substance layer 14, natural sand or the like can be used, but it is preferable to use a circular cylindrical columnar shape or an elliptical columnar resin particle having an elliptical sectional shape, For example, resin grains formed of polyethylene terephthalate pellets can be used.

  A partition wall 16 is provided in the center of the breeding water tank 1 along the longitudinal direction. This partition wall 16 is erected on the water flow partition plate 10, and the partition wall 16 divides the inside of the breeding chamber 11 of the breeding water tank 1 in the width direction. A pair of parallel water channels 17a, 17b is formed. The partition wall 16 is provided in a range that does not reach both ends of the breeding water tank 1, and the ends of the water channels 17 a and 17 b communicate between the both ends of the partition wall 16 and the peripheral walls of both ends of the breeding room 11. The communicating water channels 18a and 18b are formed.

  The water in the breeding aquarium 1 is circulated while being purified through a water supply channel 21 and a return channel 22 by a circulation pump 20. The circulation pump 20 is connected to the water supply chamber 12 of the breeding aquarium 1 by a water supply channel 21, and the water supply channel 21 is branched and connected to one end and the other end of the breeding aquarium 1 as shown in FIG. It is. The return path 22 is disposed at the bottom of the water supply chamber 12 as shown in FIG. 2, and one end is led out from the end of the breeding water tank 1 and is circulated through a filter 23 formed by a drum filter or the like. 20 is connected. In the water return chamber 22, a drain tube 25 is set up in the water return chamber 22, and the drain tube 25 has an upper end opening disposed in the breeding chamber 11 through the water partition plate 10 and the sandy substance layer 14. It is. The upper end opening of the drain tube 25 is surrounded by a guard tube 26 formed of a net as shown in FIG. 5 so as to prevent the intake of seafood. The upper end portion of the guard tube 26 is more than the water surface L of the breeding aquarium 1. It protrudes upward.

  Further, a plurality of nozzles 2 are provided in each of the water channels 17a and 17b in the breeding chamber 11 of the breeding water tank 1, and these nozzles 2 are arranged at predetermined intervals along the water channels 17a and 17b. The nozzle 2 is formed by providing discharge ports 28 at a plurality of locations along the longitudinal direction (cylinder axial direction) of a horizontally disposed cylinder, and each nozzle 2 has water channels 17a and 17b in the width direction. It is arranged so that it crosses. Here, in one water channel 17a, the first nozzle 2a is disposed closer to one end portion, and the second nozzle 2b is disposed closer to the longitudinal center of the water channel 17a than the first nozzle 2a. As described above, a plurality of nozzles 2 are arranged, and in the other water channel 17b, the first nozzle 2a is arranged closer to the other end, and the second nozzle 2b is connected to the first nozzle 2a. Also, a plurality of nozzles 2 are arranged so as to be arranged closer to the center in the longitudinal direction of the water channel 17b. The first nozzle 2a located at the end is provided with a discharge port 28 so as to face the second nozzle 2b, so that the discharge port 28 of each nozzle 2 has the same direction in each water channel 17a, 17b. It is made to face. Therefore, the direction of the opening of the discharge port 28 of each nozzle 2 is set so that the nozzle 2 of the one water channel 17a and the nozzle 2 of the other water channel 17b are opposite in direction.

  A water supply pipe 29 is provided at the end of each nozzle 2 on the partition wall 16 side so as to rise upward, and the nozzle 2 is held in the breeding room 11 by fixing the water supply pipe 29 to the partition wall 16. I have to do it. The nozzle 2 is disposed in the water below the water surface L of the breeding room 11 as shown in FIG. 4A, and the nozzle 2 is positioned slightly above the middle between the upper surface of the sandy substance layer 14 and the water surface L. Is preferably arranged. Further, as shown in FIG. 4B, it is preferable that the discharge port 28 is provided so as to face the nozzle 2 slightly downward so that the discharge direction is about 1 to 2 degrees below the horizontal.

  As shown in FIGS. 1 and 2, a water supply pipe 31 branched from the water supply path 21 is connected to an upper end portion of a water supply pipe 29 provided in each nozzle 2. An opening / closing valve 33 is provided at a connection portion of the water supply pipe 31 to the water supply passage 21, and an opening / closing valve 34 is provided at a connection portion of the water supply pipe 31 to each water supply pipe 29. Further, an opening / closing valve 35 is provided at a position downstream of the flow of water from the connection portion of the water supply passage 21 with the water supply pipe 31. These on-off valves 33, 34, and 35 are formed of electromagnetic valves or the like so that the on-off can be automatically controlled.

  In the breeding apparatus formed as described above, it is possible to cultivate habitable seafood, such as prawns, that are submerged in the sandy material layer 14 in the breeding room 11 of the breeding aquarium 1. When the on-off valve 35 is opened and the circulation pump 20 is operated with the on-off valve 33 closed, the water in the breeding chamber 11 of the breeding aquarium 1 enters the return path 22 from the drain tube 25 and is supplied to the filter 23. Solids in the water are removed. The water that has passed through the filter 23 is supplied to the water supply chamber 12 of the breeding water tank 1 through the water supply path 21 by the discharge force of the circulation pump 20. Furthermore, the water that has flowed into the water supply chamber 12 passes through the water flow partition plate 10, the mesh sheet 13, and the sandy material layer 14 due to the discharge water pressure from the circulation pump 20, and flows into the breeding chamber 11. In this way, the water in the breeding aquarium 1 can be circulated.

  Then, the water supplied to the water supply chamber 12 as described above is passed through the sandy substance layer 14 from the lower side to the upper side to be transferred to the breeding room 11, thereby remaining food and molting shells in the sandy substance layer 14. Such foreign substances can be pushed upward by the water flow to the upper side of the sandy substance layer 14 and can be lifted, and the foreign substances can be removed from the sandy substance layer 14. In addition, by passing water through the sandy material layer 14 in this way, the water contained in the sandy material layer 14 is constantly updated, and the sandy material layer 14 is aerobic with oxygen contained in the water. It can be kept in. For this reason, it prevents the inside of the sandy substance layer 14 from becoming anaerobic, promotes the growth and activation of nitrifying bacteria, which are aerobic bacteria inhabiting the sandy substance layer 14, and excretes it from the seafood to be bred. Thus, it is possible to satisfactorily decompose ammonium to be decomposed by nitrifying bacteria, and it is possible to eliminate the necessity of providing special equipment for ammonia decomposition.

  As described above, foreign matters such as residual food and husks in the sandy substance layer 14 are pushed up, and foreign matters are present at the bottom of the breeding room 11. Therefore, an operation for removing this foreign substance from the breeding room 11 is performed about 1 to 3 times a day. In the foreign matter removing operation, first, the on-off valve 35 of the water supply passage 21 is closed and the on-off valve 33 of the water supply pipe 31 is opened. When the on-off valve 33 of the water supply pipe 31 is thus opened, water is sent out from the water supply path 21 to the water supply pipe 31 by the discharge force of the circulation pump 20, water is supplied to the nozzle 2, and water is discharged from the discharge port 28. The When water is discharged from the discharge port 28 of the nozzle 2 disposed in the water channels 17a and 17b of the breeding room 11, a water flow is generated in the breeding room 11 in the water discharge direction. As shown by arrows in FIG. 3, the direction of the water flow is opposite between the water channel 17 a and the water channel 17 b, the direction of the water flow is changed by 180 ° in the communication water channels 18 a and 18 b, and the breeding room 11 partitioned by the partition wall 16. It becomes a circulating current that flows in one direction along the peripheral wall of the breeding room 11. When a circular flow that flows in one direction in the breeding room 11 partitioned by the partition wall 16 occurs in this way, when the water flow changes direction from the communication water channel 18b to the water channel 17a, the inflow side end portion of the water channel 17a. In FIG. 3, a vortex is generated at a location in contact with the end portion of the partition wall 16 and a vortex flow is generated at the inflow side end portion of the water channel 17a in a range of about half the width of the water channel 17a as shown in FIG. Similarly, at the inflow side end portion of the water channel 17b, a vortex is generated as shown in FIG. 3 in a range of approximately half the width of the water channel 17b at the portion in contact with the end portion of the partition wall 16. The generation of such eddy currents has been confirmed by simulation and has also been confirmed in actual machines.

  The foreign matter existing in the breeding room 11 is washed away by the water flow as described above, moves along the water channels 17a and 17b, passes through the communication water channels 18a and 18b, and passes from the water channel 17a to the water channel 17b or the water channel 17b. The vortex flow is generated at the inflow side end of the water channel 17a and the inflow side end of the water channel 17b as described above. Therefore, the eddy current causes foreign matter to flow into the vortex flow generation unit of the water channel 17a. It gathers in the eddy current generation part of the water channel 17b, and this part can be collected as the foreign material collection point 3 to collect foreign material. At this time, a foreign matter stopping net 36 that does not allow foreign matter to pass is provided downstream of the water flow at the foreign matter collection location 3 to prevent foreign matter from flowing out from the foreign matter collection location 3. The foreign material can be reliably collected at the location 3. The foreign matter retaining net 36 is preferably provided in a range of about half of the width direction of the water channels 17a and 17b from the partition plate 16 so as not to prevent the seafood from moving in the breeding room 11.

  Here, as described above, the opening / closing valve 34 is provided at the connection portion of each nozzle 2 of the water supply pipe 31 to the water supply pipe 29, and each nozzle 2 is sequentially operated by controlling the opening / closing of the opening / closing valve 34. The water is discharged sequentially. That is, when only the first nozzle 2a provided in the water channel 17a and the water channel 17b is discharged for a predetermined time and water is discharged from the first nozzle 2a, the first nozzle 2a and the second nozzle 2b The foreign matter existing between them is caused to flow by the water flow generated by the water discharge, and moves forward of the second nozzle 2b. Next, when the discharge of the first nozzle 2a is stopped, only the second nozzle 2b is discharged for a predetermined time, and water is discharged from the first nozzle 2a, it exists in front of the second nozzle 2b. The foreign matter is caused to flow by the water flow caused by the discharge of the water, moves to the foreign matter collection point 3, and the foreign matter can be collected at the foreign matter collection point 3. The plurality of nozzles 2 arranged in this way can be moved so as to send foreign substances in order by performing discharge operation at predetermined time intervals in order from the upstream side to the downstream side of the water flow. Foreign matter can be efficiently collected at the collection point 3. In particular, if water is discharged from all nozzles 2 at the same time, the discharge pressure of water from each nozzle 2 will be low, and large foreign matter may not be able to be moved by water flow. In this case, the discharge pressure of water from each nozzle 2 is increased, and even a large foreign matter can be moved by a water flow and collected in the foreign matter collection point 3. For example, after operating the first nozzle 2a for 30 minutes, the second nozzle 2b is operated for 30 minutes, and further, the first nozzle 2a is operated for 20 minutes, and then the second nozzle 2b is operated for 15 minutes. Thus, the nozzle 2 can be operated intermittently in order. Of course, the operation time of the nozzle 2 is not limited to this. For example, the operation time of the first nozzle 2a and the second nozzle 2b may be set to 15 minutes, respectively. It can be done.

  The number of nozzles 2 arranged in the water channels 17a and 17b of the breeding room 11 is determined according to the length of the water channels 17a and 17b. In the illustrated embodiment, two nozzles 2 are provided in each water channel 17a and 17b. Although arranged one by one, three or more nozzles 2 may be arranged according to the length of the water channels 17a and 17b.

Here, when the water channels 17a and 17b are long and the number of nozzles 2 arranged in the water channels 17a and 17b increases, the nozzles 2 arranged in the water channels 17a and 17b are formed from a plurality of sets of nozzles 2, The nozzles 2 of each group may be discharged at predetermined intervals in order from the upstream group to the downstream group. FIG. 6 shows an example (FIG. 6 shows only the nozzle 2 but the other configurations are the same as above). For example, eight nozzles 2 are arranged in each of the water channels 17a and 17b. Yes, the nozzles 2 arranged in the water channels 17a and 17b are arranged in order from the upstream side of the water flow, nozzle 2-1, nozzle 2-2, nozzle 2-3, nozzle 2-4, nozzle 2-5, nozzle 2-6, Assuming that the nozzle 2-7 and the nozzle 2-8 are used, one set of the nozzle 2-1, the nozzle 2-3, the nozzle 2-5, and the nozzle 2-7 arranged in an odd number is an even number arranged in the nozzle 2-2. , The nozzle 2-4, the nozzle 2-6, and the nozzle 2-8 form another set. Since the nozzle 2-1 located at the uppermost stream in the odd group is upstream of the nozzle 2-2 located at the uppermost stream in the even group, first, the nozzles 2-1, nozzle 2-3, and nozzles of the odd group 2-5 and nozzles 2-7 are simultaneously discharged for a predetermined time, for example, 30 minutes, and then stopped, and then an even number of nozzles 2-2, nozzle 2-4, nozzle 2-6 and nozzle 2-8 are simultaneously For a predetermined period of time, for example, 30 minutes, and then stop the operation, and then discharge the odd number of nozzles 2-1, 2-3, nozzle 2-5, and nozzle 2-7 all at once for a predetermined period of time, for example, 20 minutes. After being stopped, the even number of nozzles 2-2, nozzle 2-4, nozzle 2-6, and nozzle 2-8 are simultaneously stopped for a predetermined time, for example, 15 minutes. Of course, the present invention is not limited to the provision of an even number of nozzles 2 in each of the water channels 17a and 17b as in the embodiment of FIG. 6, but two or more nozzles 2 are arranged in each of the water channels 17a and 17b. The nozzles 2 may be sequentially discharged for each group. The present invention is not limited operating time of the nozzle 2, it is not to say can be set at any time.

  A foreign matter removing device 4 is disposed at the foreign matter collecting portion 3. The foreign matter removing device 4 can be formed by an air lift pump 38. As shown in FIG. 5, the air lift pump 38 is formed by projecting a discharge pipe 40 laterally at the upper end of the air lift pipe 39 and connecting an air hose 42 connected to the blower 41 to the lower end of the air lift pipe 39. The opening at the lower end of the air lift pipe 39 is arranged in a vertical orientation so that it is located slightly above the upper surface of the sandy substance layer 14. The air lift pump 38 supports the air lift pipe 39 by attaching it to the partition wall 16, and the tip of the discharge pipe 40 is arranged above the water surface L of the breeding room 11 at a position directly above the drain tube 25. is there. As described above, the guard cylinder 26 is attached to the upper end opening of the drain cylinder 25, and a foreign object receiving net 43 that does not allow foreign substances to pass through is placed on the upper end opening of the guard cylinder 26. The tip of the discharge pipe 40 of the air lift pump 38 is arranged immediately above the foreign material receiving net 43.

  In the air lift pump 38 formed as described above, when air is supplied into the air lift pipe 39 by operating the blower 41, the air rises in the air lift pipe 39, thereby causing water in the air lift pipe 39 to flow. Is pushed up by the air and discharged from the tip of the discharge pipe 40 at the upper end of the air lift pipe 39. As the water in the air lift pipe 39 is discharged from the discharge pipe 40 in this way, water is sucked into the air lift pipe 39 from the opening at the lower end. The suctioned foreign matter is discharged from the tip of the discharge pipe 40 together with water. Foreign matter discharged together with water can be received and collected by the foreign matter receiving net 43 of the drain tube 25. In this way, the foreign matter collected at the foreign matter collection point 3 can be efficiently captured and removed by the foreign matter removing device 4 including the air lift pump 38.

  Here, when raising crustaceans such as shrimps in the rearing tank 1, the crustaceans absorb minerals such as calcium in the seawater in the rearing tank 1 to form crusts, but the crustaceans repeatedly molt. In order to grow, the mineral content in the water in the breeding aquarium 1 is consumed and reduced. As described above, most of the foreign matter captured and removed by the foreign matter removing device 4 is the molting shell. When the molting shell removed by the foreign matter removing device 4 is discarded as industrial waste as it is, the processing cost and Not only is labor required, but also the minerals contained in the molting shells are discarded, and the minerals in the water in the breeding aquarium 1 are deficient.

  Therefore, in the embodiment of FIGS. 7 and 8, minerals are collected from the molting shells of the breeding aquarium 1 removed by the foreign matter removing device 4 and returned to the breeding aquarium 1. That is, in FIGS. 7 and 8, reference numeral 45 denotes a conveyor, which is formed as a belt conveyor in which an infinite belt belt 53 having water permeability such as a net is stretched between rolls 52 that are rotationally driven. The transporting device 45 is arranged above the breeding aquarium 1, and the end portion on the running side of the belt 53 that is driven to run by the rotation of the roll 52 is projected outward from the breeding aquarium 1. . Further, the upper end of the air lift pipe 39 forming the air lift pump 38 of the foreign substance removing device 4 is raised to a position higher than the belt 53 of the conveying tool 45, and the tip of the discharge pipe 40 at the upper end of the air lift pipe 39 is connected to the belt 53. It is located directly above. The transport tool 45 is operated at the same time when the foreign matter removing device 4 is operated. Although the blower 41 and the air hose 42 are not shown in FIG. 7, the air hose 42 is connected to the lower end portion of the air lift pipe 39 as in FIGS. 1 and 5.

  Further, the molting shell dissolution tank 48 composed of a tank body whose upper surface is open is arranged in the vicinity of the breeding water tank 1 so that the molting shell dissolution tank 48 is located immediately below the terminal end of the belt 53 of the transport tool 45. is there. The molting shell dissolution tank 48 is connected to the return path 22 between the breeding aquarium 1 and the filter 23 by an inflow path 54 and an outflow path 49. By operating a pump 55 provided in the inflow path 54, the return path The water passing through 22 flows into the molting shell dissolution tank 48 from the inflow path 54. On the inner surface of the upper shell of the molting shell dissolution tank 48, a mesh filter 58 of a mesh that does not allow the molting shell and the filter medium 47 to pass is provided, and the outflow passage 49 is connected to the molting shell dissolution tank 48 inside the mesh filter 58. It is. Further, an air diffuser 56 is disposed in the bottom of the molting shell dissolution tank 48, and the air blown from the blower 57 is discharged from the air diffusion pipe 56 so that the inside of the molting shell dissolution tank 48 can be aerated. It is. Aeration means 46 is formed from the air diffuser 56 and the blower 57. Further, a filter medium 47 is put in the molting shell dissolution tank 48. The filter medium 47 is formed of particles such as foamed resin, and a fluid filter bed that flows in water in the molting shell dissolution tank 48 is formed by the air discharged from the diffuser tube 56. A water pump (not shown) or the like may be provided in the molting shell dissolution tank 48, and the filter medium 47 may be caused to flow by this water pump. When the aeration means 46 is not provided as described above, it is desirable to provide oxygen supply means (not shown) for supplying oxygen to the molting shell dissolution tank 48.

  As described above, when the foreign matter collected at the foreign matter collection point 3 is captured by the foreign matter removing device 4 including the air lift pump 38, the foreign matter is discharged from the discharge pipe 40 at the upper end of the air lift pipe 39 constituting the air lift pump 38. Is discharged together with water and received on the belt 53 of the transport tool 45. When raising crustaceans such as shrimps in the breeding aquarium 1, most of the foreign matter is the molting shell 60. The molting shell 60 is sent to the molting shell dissolving tank 48 as the belt 53 is driven. However, since the belt 53 is formed of a net or the like, the water falls through the belt 53 and returns to the breeding tank 1. With the water drained in this manner, the husk 60 is fed into the husk dissolving tank 48 from the tip of the belt 53. At this time, the tip of the scraper 65 is elastically contacted to the outer surface of the tip of the belt 53, and the peeling shell 60 transported on the belt 53 is scraped off from the surface of the belt 53 by the scraper 65, and the peeling shell dissolution tank 48 can be reliably inserted. This scraper 65 is supported by the upper end part of the molting shell dissolution tank 48, for example.

  The molting shell 60 is decomposed in the water of the molting shell dissolution tank 48, but the decomposition of the molting shell 60 is promoted by the action of bacteria living in the filter medium 47 in the molting shell dissolution tank 48, and the molting by the aeration tube 56 is performed. The water in the shell dissolution tank 48 is not in an anaerobic state, and the activity of bacteria becomes active in an aerobic atmosphere with a large amount of dissolved oxygen, and the molting shell 60 is efficiently decomposed. In order to increase the decomposition efficiency of the molting shell 60, it is preferable to adjust the pH of the water in the molting shell dissolution tank 48 to 6.5 or higher and the water temperature to 25 ° C. or higher. When the molting shell 60 is decomposed in this way, the molting shell 60 is dissolved in water, and the mineral content is also dissolved in water. When the molting shell 60 is dissolved in water, the pump 55 is operated to cause the water passing through the return path 22 to flow into the molting shell dissolution tank 48 from the inflow path 54, and with the inflow water, By pushing up the water, the water in which the molting shell 60 is dissolved is overflowed to the outflow channel 49, sent out from the outflow channel 49 to the return channel 22, and returned to the breeding aquarium 1 through the filter 23 and the water supply channel 21. is there.

  By returning the water in which the molting shell 60 is dissolved as a mineral to the breeding aquarium 1, the mineral absorbed by the crustaceans to be bred to form the crust can be returned to the water in the breeding aquarium 1. It can prevent the mineral content of the water in the rearing tank 1 from decreasing and the balance of seawater components from being lost, and can be reared without having to replace the water in the rearing tank 1 for a long period of time. is there.

FIGS. 9A and 9B show an embodiment in which a pulverizing apparatus 50 is added to the embodiment of FIGS. In the embodiment of FIG. 9A, a pulverizing roll 62 is used as the pulverizing device 50. Then, this crushing roll 62 is arranged above the roll 52 at the end of the belt 53 that constitutes the conveying device 45, and the peeling shell 60 conveyed on the belt 53 is crushed by crushing with the crushing roll 62. Therefore, it is put into the molting shell dissolution tank 48. In the embodiment of FIG. 9B, a pulverizing mill 63 is used as the pulverizing device 50. The crushing mill 63 is disposed immediately below the end portion of the belt 53 that constitutes the conveying tool 45 on the traveling side, and the peeling shell 60 that is conveyed on the belt 53 and falls from the end portion is received by the crushing mill 63, and the peeling shell is received. 60 is pulverized by the pulverizing mill 63, and is put into the molting shell dissolution tank 48. Thus, by putting the molting shell 60 into the molting shell dissolution tank 48 in a state finely pulverized by the pulverizing apparatus 50, the molting shell 60 can be efficiently decomposed and dissolved in water.

It is a top view which shows an example of embodiment of this invention. It is front sectional drawing same as the above. It is a schematic plan view which shows the flow of water same as the above. The nozzle is shown as above, (a) is a front view and (b) is a sectional view. It is a schematic front view which shows a drain cylinder and an air lift pump same as the above. It is a schematic plan view which shows an example of other embodiment of this invention. It is a top view which shows an example of further another embodiment of this invention. It is a one part schematic front view same as the above. Other embodiment is shown, (a), (b) is a partial schematic front view, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Breeding water tank 2 Nozzle 3 Foreign material collection location 4 Foreign material removal apparatus 45 Conveyance tool 46 Aeration means 47 Filter medium 48 Dehulling shell dissolution tank 49 Outflow path 50 Crushing apparatus

Claims (6)

A plurality of nozzles for generating a water flow in the breeding aquarium by the discharged water are provided in the breeding aquarium where the seafood is bred, and the nozzles are arranged at predetermined intervals along the direction of the water flow. the foreign matter collecting portion that collects the water of the foreign matter is vortex which is moved in the breeding aquarium with water discharged from, Rutotomoni includes a foreign substance removing device for removing foreign matters from the breeding aquarium, with the foreign matter removed by the foreign matter removing apparatus A transporter with a draining function for transporting the molting shells of a certain seafood, a dehulling shell dissolving tank that dissolves the molting shells introduced from the transporting device in water, and water in which the molting shells are dissolved A seafood breeding apparatus comprising an outflow passage for returning the shellfish from the molting shell dissolution tank to the breeding water tank . 2. The fish and shellfish breeding apparatus according to claim 1, further comprising a crushing device that crushes the molting shells that are put into the molting shell dissolution tank . A plurality of nozzles for generating a water flow in the breeding aquarium by the discharged water are provided in the breeding aquarium where the seafood is bred, and the nozzles are arranged at predetermined intervals along the direction of the water flow. Using a fish rearing device equipped with a foreign matter removal device that removes foreign matter from the breeding aquarium at the foreign matter collection point where the foreign matter in the water moved in the breeding tank by the water flow discharged from the vortex gathers By moving the nozzles to be discharged from the nozzles on the upstream side of the water flow to the nozzles on the downstream side in order at predetermined time intervals, the foreign matter in the water is sequentially moved in the breeding tank by the water flow discharged from each nozzle, and the foreign matter is collected. the foreign matter removing method of rearing fish and shellfish you characterized that you removed from the breeding aquarium foreign matter that has reached the position in the foreign matter removing apparatus. The fish and shellfish breeding equipment is equipped with a transporter with a draining function for transporting the molting shells of seafood that has been removed by the foreign matter removing device, and a flowable filter medium. and exuviae dissolving tank to be dissolved in, seafood according to claim 3, wherein the formed isosamples comprises a outlet channel for returning to the breeding aquarium exuviae were dissolved water from exuviae dissolving tank Foreign matter removal method in breeding device. Seafood breeding apparatus, the foreign matter removing method of rearing fish and shellfish according to claim 4, wherein the formed isosamples comprises a crushing device for crushing the molting shell is introduced into exuviae dissolver.   A plurality of nozzles are formed from a plurality of sets of nozzles, and the nozzles of each set are arranged at predetermined intervals in order from the upstream set to the downstream set with reference to the nozzle located at the uppermost stream of the water flow in each set. The foreign matter removing method in the fish and shellfish breeding apparatus according to any one of claims 3 to 5, wherein the discharge operation is performed.

Images