JP3978416B2 - Culture system for fish-feeding organisms - Google Patents

Description

  The present invention relates to a system for culturing fish-feeding organisms such as rotifers and floating diatoms. In particular, the present invention relates to an improvement for constructing a culture system capable of performing an optimal culture operation according to the type of fish feed organisms, changes in environmental conditions, and the like.

  Conventionally, fish-feeding organisms such as rotifers and floating diatoms are generally used as initial feeds for fish and crustaceans in the production of seedlings in the fishery industry. In order to perform such seedling production, it is indispensable to stably obtain fish feed organisms, and techniques for stably culturing these fish feed organisms in large quantities have been proposed. For example, the following Patent Document 1 discloses a technology that enables stable culture of a fish-feeding organism while reducing the burden on an operator by automating a system that uses a so-called planting culture method. Yes.

-Transplanting culture method-
The above-mentioned planting culture method is a method in which a plurality of planting culture tanks that are cultivating fish-feeding organisms are connected in series with each other, and the planting culture tank that has reached a predetermined culture period (for example, 3 days) A part (for example, about 70%) of fish feed organisms is supplied to fish breeding aquariums as feed for fish and the like. Specifically, the fish feed organisms taken out from the planting culture tank are subjected to treatments such as concentration, washing, and nutrient enhancement, and then supplied to the fish breeding aquarium. On the other hand, the remaining fish-feeding organisms (for example, about 30% fish-feeding organisms) in the planting culture tank are transferred to other planting culture tanks (planted culture tanks that have been emptied before reaching a predetermined culture period). ). This operation is repeated every time any one of the joint culture tanks reaches a predetermined culture period.

-Continuous culture method-
In addition, a continuous culture method is also known as a method for culturing fish-preserving organisms. This continuous culture method is a method for culturing a feed organism for fish farming in one continuous culture tank, and continuously supplies seawater to this continuous culture tank. Then, the seawater overflowing from this continuous culture tank (seawater containing fish-feeding organisms) is stored in the harvest tank, and when the amount stored in the harvest tank reaches a predetermined amount, This fish feed organism is taken out together with seawater and subjected to predetermined treatment (treatment such as concentration, washing, and nutrient enhancement) and then supplied to the fish breeding aquarium.
JP 2000-23594 A

  As described above, the conventional methods for culturing fish feed organisms are typically known as a subculture culture method and a continuous culture method. However, these culture methods have the following problems and can solve these problems. The culture system has not been constructed yet.

-Problems of the subculture method-
(A-1) In the planting culture method, when the culture period in the planting culture tank is set constant (for example, 3 days), a certain planting culture tank reaches a predetermined culture period. Then, a system is created by creating a cycle in which one other subculture tank is emptied, and supplying each feed subculture tank with a fish feed organism in turn (this operation is hereinafter referred to as a subculture operation). So that you can continue driving.

For this reason, changes in the environment, for example, the water temperature in one planting culture tank rises, or a large amount of chlorella serving as feed for fish farming organisms is supplied into one planting culture tank. Even if the breeding speed of the fish feed organism rapidly increases and the density of the fish feed organism in the tank rises rapidly, the fish feed organism until the culture period of the planting culture tank reaches the predetermined period. Must continue to be cultured. In other words, the fish-feeding organisms must be cultured in an over-density state in the joint culture tank. If such a situation lasts for a long time, a large amount of flocks such as feces (metabolites) and carcasses of fish-feeding organisms accumulate in the tank, and the tank environment is deteriorated. As a result, there arise problems that the survival rate of the fish-feeding organisms deteriorates or that a large amount of fish-feeding organisms that exceed the culture peak (bad life) are harvested.
(A-2) On the other hand, due to environmental changes, the breeding rate of the fish feed organisms rapidly decreases, and the density of the fish feed organisms in the planting culture tank is sufficient even when the predetermined culture period is reached. Even if it is not obtained, harvesting and planting operations of fish feed organisms will be performed in order to continue the above cycle. For this reason, if this operation is repeated, the dilution in the planting culture tank proceeds, and the density of the feed organism for fish farming may become extremely low, making it impossible to continue the culture operation.
(A-3) Breeding organisms for fish farming vary greatly in fertility and lifespan depending on the type. For example, there are L and S types of rotifers, and there are strain types for each habitat in each type, and their fertility and life span are different. For this reason, the culture | cultivation period optimal in cultivating the feed organism for fish farming changes with kinds. For example, some types of (eg, highly fertile) fish feed organisms are best suited for two days of culture, while other types of (eg, low fertile) fish feed organisms are best suited for three days of culture. There is the present situation. For this reason, the number of planting culture tanks to be used is different between the case where the former fish-feeding organism is cultured by the planting culture method and the case where the latter fish-cultured organism is cultured by the planting culture method. Become. None of the conventional subculture culture systems are based on the premise that the number of subculture culture tanks used is changed. In other words, culture is possible depending on the number of subculture culture tanks provided in the subculture culture system. The types of fish for fish farming were also limited. In other words, in the planting culture system with three planting culture tanks, only the feed organism for fish farming cultured for two days can be cultivated, and there is a planting culture system with four planting culture tanks. In the past, only three-day cultured fish feed organisms could be cultured. That is, one culture system could not cope with many kinds of fish feed organisms.
(A-4) In the planting and culturing method, a plurality of planting and culturing tanks are connected to each other in series. Along with this, the toxic substance is mixed in all the subculture tanks, and there is a possibility that the fish-feeding organisms in the system are completely destroyed. In addition, when even one of the plurality of planting culture tanks is broken, it becomes impossible to continuously perform the planting operation, and while repairing the failed planting culture tank, In addition, in other planting culture tanks, the culture period will be prolonged, and the environment in the tank will be deteriorated, and in this case, the fish-feeding organisms in the system will be annihilated as a result. there is a possibility. In order to avoid this, it is considered to provide a plurality of planting lines in which a plurality of planting culture tanks are connected in series with each other independently so that no planting operation is performed between the lines. It is done. In other words, even if the fish feed organism is annihilated in one line, the other fish can make the fish feed organism survive. However, in this case, even if only two planting lines are used, the number of necessary planting culture tanks is twice that of the conventional one (for example, 8), and a large number of planting culture tanks are required. This is not preferable because the system configuration is complicated, the control operation is complicated, and the construction cost is increased.

-Failure of continuous culture method-
(B-1) In the continuous culture method, as a countermeasure when the breeding rate of the fish feed organism rapidly increases and the density of the fish feed organism in the continuous culture tank rapidly increases, It is conceivable to optimize the density by increasing the amount of seawater supplied. In this case, however, a large amount of seawater (seawater containing fish-feeding organisms) is supplied to the harvesting tank per unit time. Generally, the capacity of this harvesting tank is preset according to the capacity of the culture system. For example, in a system that harvests 10 tons of seawater per day, the capacity of this harvesting tank is also set so that 10 tons of seawater can be stored. Therefore, when the amount of seawater supplied to the continuous culture tank is increased in order to optimize the density of the feed organism for fish farming as described above, the capacity of the harvest tank becomes insufficient, and in some cases Seawater may overflow from the tank. In order to avoid this, it is conceivable to design the harvesting tank in a large size in advance, but this is not preferable because it leads to an increase in the size of the system and an increase in construction costs.
(B-2) Moreover, since the continuous culture method has only one continuous culture tank, if a toxic substance is mixed in the continuous culture tank, the feed organism for fish farming will be annihilated immediately. There was a fear. Moreover, since only one harvesting tank is provided, if either one of the continuous culture tank or the harvesting tank breaks down, the system operation becomes impossible. For example, when a continuous culture tank breaks down, all the seawater in the tank must be extracted and repaired, which may lead to the annihilation of feed organisms for fish farming. On the other hand, if the harvesting tank breaks down, seawater cannot be supplied to the continuous culture tank, so the culture period in the tank will be prolonged and the environment in the tank will be deteriorated. As a result, the fish feed organisms in the system may be annihilated as a result.

  The present invention has been made in view of the above points, and the object of the present invention is to eliminate both of the above-described problems of the planting and culturing methods and the problems of the continuous culture method. It is an object of the present invention to provide a culture system for fish-feeding organisms capable of performing an optimal culture operation according to changes in the quality of the fish.

-Summary of invention-
In order to achieve the above object, the solution means of the present invention constitutes a culture system with a plurality of tanks, and each tank has a function as a culture tank and a function as a harvest tank. The connection state of these tanks is configured to be arbitrarily switchable, and the number of tanks functioning as culture tanks, the number of tanks functioning as harvesting tanks, and their connection relations are determined depending on the type of fish feed organism and the environment. It can be set arbitrarily according to changes in conditions.

-Solution-
Specifically, the present invention is premised on a system for cultivating a feed organism for fish farming. For this culture system, three or more combined function tanks having functions as a culture tank and a harvesting tank are connected to each other by piping, and the communication state between the combined function tanks by these pipes is switched. The number of combined function tanks functioning as tanks and the number of combined function tanks functioning as harvesting tanks can be arbitrarily switched. Then, while introducing the culture solution into the combined function tank functioning as the culture tank, the culture solution containing the fish feed organism discharged from the combined function tank is harvested in the combined function tank functioning as a harvesting tank. It is configured.

  Moreover, the following structure is mention | raise | lifted as another solution means to achieve said objective. First, a system for cultivating a feed organism for fish farming is assumed. For this culture system, four or more combined function tanks having functions as a culture tank and a harvesting tank are connected to each other by piping, and the communication state between the combined function tanks by these pipes is switched. The first combined function tank usage mode that increases the number of combined function tanks that function as harvesting tanks than the number of combined function tanks that function as tanks, and functions as a harvest tank rather than the number of combined function tanks that function as culture tanks The second multi-function tank usage mode for reducing the number of multi-function tanks to be configured can be arbitrarily switched. Then, while introducing the culture solution into the combined function tank functioning as the culture tank, the culture solution containing the fish feed organism discharged from the combined function tank is harvested in the combined function tank functioning as a harvesting tank. It is configured.

  As a configuration for providing the “function as a culture tank”, the culture solution can be introduced, and a feed (for example, chlorella) can be supplied to the fish feed organism. In addition, air and oxygen necessary for cultivation can be introduced, the temperature of the culture medium can be controlled, and the feed organism for fish farming can be sent to other tanks (harvesting tanks). For example, it can be discharged together with the culture solution. On the other hand, as a configuration for providing “function as a harvesting tank”, it is configured to be able to introduce a fish-feeding organism from other tanks (culture tanks) together with a culture solution, It is configured to allow the introduction of air and oxygen necessary for survival, and is configured to be able to control the temperature of the culture solution. It is listed that it can be discharged together with the culture solution into subsequent processes (concentration, washing, nutrition enhancement, etc.).

  From the above specific matters, according to this solution, the number of culture tanks (number of tanks functioning as culture tanks), the number of harvest tanks (number of tanks functioning as harvest tanks), and their connection relation It can be set arbitrarily according to the type of feed organism and changes in environmental conditions. In other words, the capacity of the culture tank and the capacity of the harvest tank as the entire system can be arbitrarily set. As a usage pattern of this system, the first combined function tank usage pattern described above (a mode in which the number of combined function tanks functioning as harvesting tanks is increased more than the number of combined function tanks functioning as culture tanks), the second Combined function tank usage form (a form in which the number of combined function tanks functioning as harvesting tanks is less than the number of combined function tanks functioning as culture tanks), and functions as a culture tank as a third combined function tank use form It is possible to apply a form in which the number of combined function tanks to be matched with the number of combined function tanks functioning as a harvesting tank.

  The first combined function tank usage mode is used, for example, in the case of an environmental condition in which the breeding speed of fish feed organisms is high or in the case of culturing fish feed organisms having a high breeding ability. In other words, the breeding rate of fish feed organisms rapidly increases, the density of fish feed organisms in the culture tank rises rapidly, and a large amount of culture solution is supplied to optimize the density. However, by increasing the number of harvesting tanks and ensuring a large capacity as a whole, it is possible to avoid a situation in which mixed water overflows from the harvesting tanks.

  In addition, the second combined function tank usage mode is used, for example, when it is an environmental condition in which the breeding speed of the fish feed organism is low, or when a fish feed organism having a low fertility is cultured. . In other words, even if the breeding rate of the fish feed organisms is drastically reduced and the amount of water supplied must be kept low in order to maintain the density of the fish feed organisms in the culture vessel, Increasing the amount makes it possible to maintain a high yield and maintain a high system productivity.

  Moreover, according to this solution, the culture / harvest operation in the third combined function tank usage mode (a mode in which the number of combined function tanks functioning as the culture tank matches the number of combined function tanks functioning as the harvesting tank) In the case of performing the operation, it is possible to respond promptly even if there is a failure in the multi-function tank or contamination of toxic substances. That is, for example, when one multifunctional tank used as a harvesting tank fails, the tank cannot be used as a harvesting tank. Under such circumstances, the culture tank (multifunctional tank functioning as a culture tank) that had been in communication with this harvest tank (multifunctional tank that functioned as a harvesting tank) until then was replaced with another combined function tank ( It communicates with a multi-function tank functioning as a harvest tank or a multi-function tank that has not functioned until then. This makes it possible to continue the culture operation and the harvesting operation in the culture tank even after one of the harvesting tanks fails. Conventionally, when such a failure occurs, the culture period in the culture tank is prolonged while repairing the failed tank, and the environment in the tank is deteriorated. There was a possibility of annihilation. According to this solution, a failed tank can be quickly replaced with another tank, and the harvesting efficiency can be maintained. This operation can also be applied to the case where a toxic substance is mixed in the multifunctional tank used as a harvesting tank. Furthermore, it is possible to deal with a case where a failure occurs in a multi-function tank used as a culture tank or a toxic substance is mixed.

  Specific examples of the configuration for switching the communication state between the composite function tanks by piping are as follows. In other words, an open / close valve is provided in a pipe connecting the multiple function tanks to each other, and the communication state between the multiple function tanks can be switched by switching the opening / closing of these open / close valves.

  According to this specific matter, only the switching operation of the on-off valve switches the communication state between the composite function tanks, and it is possible to easily realize the automation of the switching operation of each composite function tank usage mode. For example, by inputting the type of fish feed organism and environmental conditions (temperature, etc.) to the system control system, the optimal number of tanks (number of culture tanks and number of harvest tanks) and The communication state can be automatically set, and the work burden on the worker can be reduced.

  Further, the present invention makes it possible to promote the culture of feed organisms for fish farming even in a multi-function tank functioning as a harvest tank. That is, when the number of compound function tanks that function as harvesting tanks is set to a plurality, a feeding device that feeds the feed organism for fish farming is provided in the compound function tanks that function as harvesting tanks. For example, when culturing and harvesting operations are performed with one culture tank and two harvest tanks, the fish feed organisms discharged from the culture tank are divided into two harvest tanks. In each harvest tank, the density of fish feed organisms cannot be obtained sufficiently, which may lead to a shortage of harvest. In order to avoid this, in this solution, the feeding device feeds the harvesting tank, promotes the breeding of the fish-feeding organisms in the harvesting tank, and the density of the fish-feeding organisms in the individual harvesting tanks. Is sufficient to secure the required yield.

  Moreover, the following are mentioned as a structure for producing | generating the culture solution supplied to the composite function tank which functions as a culture tank. That is, the culture solution is mixed water of seawater and clean water, and a water supply device that supplies the mixed water to the combined function tank functioning as the culture tank is provided, and the water supply apparatus is provided with the mixed water tank. And it is set as the structure which can set the mixing ratio of seawater and clean water arbitrarily by performing the water supply operation | movement of the predetermined amount seawater with respect to this mixing water tank, and the water supply operation | movement of the predetermined amount of clean water separately.

  In this way, mixed water (culture solution) with a desired concentration (salt concentration) can be obtained by separately performing seawater supply operation and clean water supply operation and managing the water level of each operation, and a simple configuration In addition, it is possible to accurately obtain mixed water having a desired concentration by the mixing operation, and it is easy to generate mixed water suitable for culturing fish-preserving organisms.

  In the present invention, a culture system is constituted by a plurality of tanks, and each tank has a function as a culture tank and a function as a harvesting tank. The connection state of these tanks is configured to be arbitrarily switchable, and the number of tanks functioning as culture tanks, the number of tanks functioning as harvesting tanks, and their connection relations are determined depending on the type of fish feed organism and the environment. It can be set arbitrarily according to changes in conditions. That is, the number of culture tanks and the number of harvesting tanks can be arbitrarily combined, such as one-to-one, multiple-to-one, one-to-multiple, and multiple-to-multiple. For this reason, the number of culture tanks (number of tanks that function as culture tanks), the number of harvest tanks (number of tanks that function as harvest tanks), and their connection relationship, changes in the type of fish feed organisms and environmental conditions Provide a new culture system that can realize the culture method that could not be realized by the conventional subculture method or continuous culture method, and can solve the problems of the conventional culture method. can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This form demonstrates the case where this invention is applied to the system which cultures the rotifer as a feed organism for fish farming.

  FIG. 1 is a piping system diagram of a culture system according to this embodiment. FIG. 2 is a schematic diagram showing the internal configuration of one multi-function tank 11, FIG. 3 is a schematic diagram showing the internal configuration of one concentrated cleaning tank 2, and FIG. It is the schematic which shows the internal structure of.

  As shown in FIG. 1, the main culture system is a tank unit composed of four tanks 11, 12, 13, 14 (multifunctional tanks referred to in the present invention), one concentration washing tank 2, 2, and two tanks. , Nutrient tanks 3, 3, recovery device 4, four fish breeding water tanks 5, 5,..., Mixing water tank 6, and washing water tank 7. Further, a seawater supply system A, a clean water supply system B, a compressed air supply system C, and a concentrated oxygen supply system D are provided. Hereinafter, each part will be described.

-Rotifer transfer circuit system-
The tank unit 1 is a characteristic part of the present system, and is configured by connecting the first to fourth composite function tanks 11 to 14 to each other by piping.

  Specifically, as this pipe connection structure, 1-2 pipe 1a for connecting the first composite function tank 11 and the second composite function tank 12, and the third composite function tank 13 and the fourth composite function tank 14 are connected. 3-4 piping 1b, 1-3 piping 1c connecting the first composite function tank 11 and the third composite function tank 13, and 2-4 piping connecting the second composite function tank 12 and the fourth composite function tank 14 1d, 1-4 piping 1e for connecting the first composite function tank 11 and the fourth composite function tank 14, and 2-3 piping 1f for connecting the second composite function tank 12 and the third composite function tank 13 are provided. Yes. In other words, the multi-function tanks 11, 12, 13, and 14 are connected in matrix to form the tank unit 1. In addition, each of the pipes 1a to 1f is provided with two motorized valves as open / close valves, and by switching the open / closed state of these motorized valves, any composite function tank can be communicated with each other. It has become.

  For example, if only the motor-operated valves respectively provided in the 1-2 pipe 1a and the 3-4 pipe 1b are opened, the first composite function tank 11 and the second composite function tank 12 communicate with each other, and the third composite The functional tank 13 and the fourth composite functional tank 14 communicate with each other. Further, if only the motor-operated valves respectively provided in the 1-2 pipe 1a, the 1-3 pipe 1c, and the 1-4 pipe 1e are opened, the second composite function tank 12 is compared with the first composite function tank 11. The third composite function tank 13 and the fourth composite function tank 14 communicate with each other. That is, three composite function tanks 12, 13, and 14 communicate with one composite function tank 11.

  One of the motor-operated valves provided on the same pipe is a two-way valve and the other is a three-way valve. A drain pipe is connected to one opening of the three-way valve.

  Moreover, the partition member 15 which partitions the inside of this tank into two spaces is provided inside each composite function tank 11, 12, 13, and 14, and the inside of a composite function tank is divided into this tank by this partition member 15. It is partitioned into a main space 1A that occupies most of the space and an overflow space 1B that is a small space. The pipes 1a to 1f communicate with an overflow space 1B partitioned by the partition member 15.

  As shown in FIG. 2, a chlorella storage tank 8 is installed adjacent to each of the combined function tanks 11 to 14, and the chlorella in the chlorella storage tank 8 is fed by a chlorella feeding pump 81. 82 is fed into the multifunctional tanks 11-14. The chlorella storage tank 8, the chlorella feeding pump 81, and the chlorella feeding pipe 82 constitute a feeding device known in the present invention.

  Furthermore, a temperature sensor 17 and a heater 18 are provided in the composite function tanks 11 to 14, and the temperature of the culture solution (mixed water of seawater and tap water) in the composite function tanks 11 to 14 is suitable for culture. It is configured to keep it constant at different temperatures. Furthermore, an ultrasonic water level gauge 19 is provided on the upper part of the composite function tanks 11 to 14 so that the water level of the culture solution in the composite function tanks 11 to 14 can be detected.

  Moreover, the density measuring apparatus which is not shown in figure which measures the density of the feed organism for fish farming (rotifer) is arrange | positioned at each composite function tank 11-14. The system includes a control panel 10 for comprehensively controlling the entire system, and the control panel 10 includes an arithmetic unit. By calculating the amount of water in the tank from this water level detected by the ultrasonic water level gauge 19 and multiplying by the density measuring apparatus or the density of the culture solution measured by a microscope, the multi-function tanks 11-14 are calculated. It is the structure which can calculate the solid number of the culture feed organism currently stored in the inside. A pressure gauge may be attached to the bottom of the tank as a means for calculating the amount of water in the tank.

  And based on the data of the amount of rotifer calculated | required, the supply_amount | feed_rate in the multifunctional tanks 11-14 of the chlorella (baker yeast is used together as needed) used as the rotifer's feed is determined. These operations are automatically executed by determining the transfer timing of the culture solution when transferring the rotifers in the tanks 11 to 14 to the concentrated washing water tank 2.

  In addition, according to culture | cultivation conditions, feeding conditions, etc., the supply operation | movement of the compressed air from the compressed air supply system C into the composite function tanks 11-14, the concentrated oxygen from the concentrated oxygen supply system D into the composite function tanks 11-14 Supply operation, ON / OFF operation of each heater for adjusting the temperature of the culture solution, supply operation of warm seawater from the seawater supply system A to the composite function tanks 11 to 14, and the composite function tank 11 from the water supply system B Various control operations such as the operation of supplying warming water to -14, the operation of supplying cleaning water to the cleaning water tank 7, and the timing of draining the water stored in the composite function tanks 11 to 14 are appropriately performed. It is automatically controlled by the control panel 10 to operate. Moreover, the automatic control of the culture process in the composite function tanks 11 to 14 can be similarly applied to each water tank such as the nutrient enhancement tank 3.

  In the conventional culture process, the operator himself / herself visually confirmed the water level of each tank, calculated the volume of the culture solution, and estimated the amount of rotifer in the tank based on the measurement result of the culture solution density. These calculations and trial calculations take a long time, and errors often occur in the calculated data. Therefore, it has been difficult to appropriately determine the amount of chlorella supplied into the tank and the amount of rotifer transferred to the concentrated washing tank. In addition, based on the culture conditions calculated and determined in this way, the operator himself performed operations such as adjusting the temperature of the culture solution, supplying water to the tank, and washing the tank. There was a fear.

  In the system according to the present embodiment, the supply amount of chlorella into the composite function tanks 11 to 14 and the transfer timing of the rotifer to the concentrated cleaning tank 2 can be appropriately determined, and the inside of the composite function tanks 11 to 14 can be determined. It is possible to significantly reduce the waiting time for the work that occurs when calculating the amount of rotifer and determining the supply amount of chlorella and the transfer timing of rotifer. In addition, since operations such as water temperature adjustment of the culture solution, water supply to the composite function tanks 11 to 14 and washing of the composite function tanks 11 to 14 performed based on the culture conditions and the like are automatically controlled by the control panel 10, Therefore, it is possible to execute the operation accurately without any erroneous operation. For example, the waiting time and work time required when the conventional worker himself calculated and decided and operated peripheral devices were about 5 hours excluding counting work, In the case of automation as in this example, the waiting time and work time can be made almost zero.

  On the other hand, harvest tubes 1g, 1h, 1i, and 1j are connected to the bottoms of the multi-function tanks 11, 12, 13, and 14, respectively. The harvesting tubes 1g to 1j communicate with the main space 1A in the tank space. In addition, each harvesting tube 1g-1j is provided with a motor-operated valve comprising a two-way valve, and by opening this motor-operated valve, rotifers can be recovered from the combined function tanks 11-14 together with the culture solution. ing.

  And as shown in FIG. 1, the downstream end of each said harvesting pipes 1g-1j is connected to the one junction pipe 16, and this junction pipe 16 is connected via the rotifer transfer pump P1 and the 1st supply pipe 21. As shown in FIG. It is connected to each of the concentrated cleaning tanks 2 and 2. Each branch pipe on the downstream side of the junction pipe 16 and the first supply pipe 21 is provided with an electric valve, and when each of these electric valves is opened and the rotifer transfer pump P1 is driven, any one of the harvest pipes is provided. The rotifer which passed 1g-1j, the confluence | merging pipe | tube 16, and the 1st supply pipe | tube 21 is supplied to each concentration washing tank 2 and 2 with a culture solution.

  The merging pipe 16 and the nutrient enhancement tanks 3 and 3 are connected by a second supply pipe 31. The second supply pipe 31 and each branch pipe on the downstream side thereof are provided with motorized valves, respectively, the motorized valves of the first supply pipe 21 and the motorized valves of the second supply pipe 31 are opened, and the rotifer is transferred. By rotating the pump P1 in the reverse direction, the rotifer concentrated and washed in each of the concentration cleaning tanks 2 and 2 is supplied to each of the nutrient enhancement tanks 3 and 3 through the first supply pipe 21 and the second supply pipe 31. It has become.

  Each of the nutrient enhancement tanks 3 and 3 and the collector 4 are connected by a third supply pipe 41 provided with a rotifer feeding pump P2. Each branch pipe on the upstream side of the third supply pipe 41 is provided with a motor-operated valve. When each motor-operated valve of the third supply pipe 41 is opened and the rotifer feeding pump P2 is driven, each nutrition enhancement tank The rotifer fortified with 3 and 3 is collected in the collection device 4.

  Then, the rotifer recovered in the recovery device 4 is temporarily transferred to the feeding container 42 by an operator's manual operation or the like, and then supplied to each fish breeding aquarium 5, 5,... Is done.

  Thus, the rotifer extracted together with the culture solution from the specific combined function tank of the tank unit 1 (the rotifer culture operation and harvesting operation in the tank unit 1 will be described later) is concentrated in the concentration washing tanks 2 and 2. And after the concentrated chlorella and nutrients are given to the nutrient-enriched water tanks 3 and 3 and the nutrients are enhanced (further culture), the fish tanks 5, 5,... Feeding to fish.

  The said concentration washing tank 2 is explained in full detail below. As shown in FIG. 3, the concentration washing tank 2 has a concentration net configured such that rotifers, which are fish feed organisms, do not pass through, and culture fluid (mixed water of seawater and clean water), filth, and the like can pass through. 22 is arranged in a double structure, and when the rotifer cultured in the composite functional tanks 11 to 14 is supplied into the concentration net 22 through the first supply pipe 21 together with the culture solution, The mixed water subjected to microfiltration for washing the rotifer is supplied from the mixed water supply pipe 63, and the clean water is supplied from the clean water supply pipe B2 of the clean water supply system B. When rotifer, mixed water, and clean water are supplied into the concentration net 22, the concentration net 22 is swung by a rocking mechanism (not shown) provided in the concentration net 22. As a result, the culture solution or the like supplied into the concentration net 22 passes through the concentration net 22 and flows out from the overflow pipe 23 of the concentration washing tank 2. On the other hand, since the rotifer does not pass through the concentration net 22, it stays in the concentration net 22 and is stored, and the density in the concentration net 22 increases and is concentrated. In addition, rotifers stored in the concentration net 22 are washed in the course of the flow of the culture solution or the like supplied into the concentration net 22 to the outside. In addition, the cleaning effect of the rotifer is improved by swinging the concentration net 22. In addition, by supplying mixed water or clean water into the concentration net 22 during the concentration / cleaning operation, dissolved oxygen and air in the atmosphere are supplied to the culture solution. Even if the rotifer in the concentration net 22 is concentrated and becomes high density, the culture solution does not fall into oxygen shortage.

  Thus, in the concentration washing tank 2, rotifers are concentrated and washed, but the rotifers in the concentration net 22 may clog the eyes of the concentration net 22, and the culture solution may not pass through the concentration net 22. is there. In this case, since the culture solution or the like continuously supplied overflows from the upper end of the concentration net 22 together with the rotifer in the concentration net 22, the culture is performed when the concentration net 22 is clogged. It is necessary to temporarily stop the supply of liquid or the like. Therefore, an ultrasonic water level gauge 24 is arranged above the concentration net 22 to detect the water level in the concentration net 22. When the water level rises, it is determined that the concentration net 22 is clogged, and the culture solution. Etc. are configured to be stopped. After that, when the water level decreases, the supply of rotifer from the first supply pipe 21 and the supply of mixed water and clean water are resumed, and the concentration / cleaning operation is continued. In this case, since the water level meter 24 is composed of an ultrasonic water level meter that detects the water level by emitting ultrasonic waves to the water surface and measuring the distance to the water surface, it is not in contact with the water surface, Since it is installed above the concentration net 22, even when bubbles are generated on the water surface, it is possible to detect an accurate water level by adjusting the sensitivity. As a result, bubbles are attached to the water level gauge as in the case where the water level is detected using a float-type water level gauge or a rod-shaped water level gauge, which is an obstacle when the water level is erroneously detected or when the concentrated cleaning tank 2 is washed. Can be prevented.

  When the concentration / cleaning operation in the concentration cleaning tank 2 is completed, the mixed water is supplied into the concentration net 22 and the high density rotifer in the concentration net 22 is diluted to improve the fluidity, and the rotifer transfer pump P1 is operated. The rotifer is driven reversely, the rotifer in the concentration net 22 is sucked and transferred to the nutrient enhancement tank 3 through the second supply pipe 31, and the next process is performed.

  As described above, when the concentration work is performed in the concentration washing tank 2, by supplying the mixed water subjected to microfiltration into the concentration washing tank 2, the rotifer can be sufficiently washed simultaneously with the concentration work. Contamination in the nutrient enhancement tank 3, which is a process, and lack of nutrient enhancement can be resolved. Further, by continuously supplying the mixed water, fresh oxygen is always supplied to the culture solution being concentrated, and it is possible to prevent the concentrated and densified rotifer from falling short of oxygen. In addition, since the concentrated and washed rotifer is transferred to the next process while supplying mixed water to dilute the concentration, the oxygen deficiency of the rotifer during transfer is eliminated and physical damage to the rotifer is reduced during the transfer. Can be made. As a result, the number of rotifers that die during the transfer is greatly reduced, so that the harvesting efficiency can be improved.

  Next, the nutrient enhancement tank 3 will be described in detail. As shown in FIG. 4, the nutrient enhancement tank 3 can supply heated seawater through the seawater supply pipe A <b> 2, can supply cleaning water from the cleaning water tank 7, and can be supplied from the chlorella storage tank 8 through the chlorella feeding pipe 82. It is configured to feed chlorella and supply nutrients through the nutrient enhancement tube 32. In addition to supplying concentrated oxygen through the concentrated oxygen supply pipe D2 of the concentrated oxygen supply system D and supplying compressed air through the compressed air supply pipe C2 of the compressed air supply system C, the rotifer that is cultured while enhancing nutrition is high. Even if the density is increased, oxygen is not deficient. Further, a temperature sensor 33 and a heater 34 are also provided in the nutrient enhancement tank 3 so that the temperature of the culture solution in the nutrient enhancement tank 3 is kept constant at a temperature suitable for nutrient enhancement. Yes. In addition, the water level is managed by detecting the water surface height with an ultrasonic water level meter.

−Seawater / water supply system−
Next, the seawater supply system A will be described. This seawater supply system A supplies the seawater stored in the seawater storage tank A1 to the mixed water tank 6, the combined function tanks 11 to 14, and the nutrient enhancement tanks 3 and 3. Here, the supply of seawater to each of the combined function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3 is performed as necessary.

  The seawater supply system A has a seawater supply pipe A2 having an upstream end connected to the seawater storage tank A1 and provided with a seawater supply pump P3. In FIG. 1, the seawater flow path is indicated by “HSH”. The seawater supply pipe A2 is provided with a heat exchanger A3 that receives heat from a heat source (not shown), and the seawater is heated by the heat exchanger A3. In addition, the downstream end of the seawater supply pipe A2 is branched, one of which is connected to the mixed water tank 6 through the microfiltration filter 61, and the other is composed of the combined function tanks 11 to 14, the nutrient enhancement tank 3, 3 is open at the top. Each branch pipe extending toward each of the composite function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3 is provided with an electric valve, and when the electric valve is opened and the seawater supply pump P3 is driven, seawater storage is performed. Seawater taken out from the tank A1 and heated can be supplied to the combined function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3.

  The tap water supply system B supplies the tap water stored in the tap water (tap water) storage tank B1 to the mixed water tank 6 and each composite function tank 11-14. Here, the supply of clean water to each of the composite function tanks 11 to 14 is performed as necessary.

  The water supply system B has a water supply pipe B2 having an upstream end connected to the water storage tank B1 and provided with a water supply pump P4. In FIG. 1, the flow path of clean water is indicated by “HW”. The water supply pipe B2 is also provided with a heat exchanger B3 that receives heat from a heat source (not shown), and the water is heated by the heat exchanger B3. Further, the downstream end of this water supply pipe B2 is branched, one of which is connected to the mixed water tank 6, and the other is opened at the upper part of each composite function tank 11-14. Each branch pipe extending toward each composite function tank 11-14 is equipped with an electric valve. When the electric valve is opened and the water supply pump P4 is driven, it is taken out from the water storage tank B1. Thus, the heated water can be supplied to each of the composite function tanks 11-14.

  The mixed water tank 6 receives both the seawater from the seawater supply pipe A2 and the clean water from the water supply pipe B2 as described above, and after mixing them, supplies them to the composite function tanks 11-14.

  As the mixing operation of seawater and clean water in the mixed water tank 6, first of all, the motor operated valve provided in each branch pipe extending toward the composite function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3 in the seawater supply pipe A2. The seawater supply pump P3 is driven for a predetermined time in a state in which all are closed, and seawater is supplied to a certain water level in the mixed water tank 6. Thereafter, the water supply pump P4 is driven for a predetermined time in a state where all of the electric valves provided in the branch pipes extending toward the composite function tanks 11 to 14 in the water supply pipe B2 are closed. Supply water to a certain level. For example, if the supply water level of seawater and the supply water level of clean water (the rising water level after seawater supply is stopped) are matched, mixed water in which seawater is diluted to 50% can be obtained. In this way, mixed water having a desired concentration can be obtained by separately performing the seawater supply operation and the clean water supply operation and managing the water level of each operation. Examples of means for detecting the water level include an ultrasonic water level gauge and a float switch. Moreover, the mixing water tank 6 is provided with a temperature sensor and a heater (not shown) so that the temperature of the mixing water can be adjusted.

  A configuration for supplying the mixed water whose concentration is adjusted in this way to each of the composite function tanks 11 to 14 will be described below. The mixed water tank 6 is provided with a pair of water supply pumps P5 and P5, and the mixed water pumped up by these water supply pumps P5 and P5 is joined by a merge header 62. This combined header 62 and each composite function tank 11-14 are connected by the mixed water supply pipes 63, 63,..., And the downstream ends of these mixed water supply pipes 63, 63,. It is open. Further, each mixed water supply pipe 63, 63,... Is provided with flow control valves 64, 64,... And flow meters 65, 65,. The flow rate control valves 64, 64,... Are controlled while detecting the mixed water supply amount in the pipes 63, 63,. Yes. Thereby, the water supply apparatus said by this invention is comprised.

-Compressed air supply system C-
Next, the compressed air supply system C will be described. The compressed air supply system C includes a compressor C1 and a compressed air supply pipe C2. In FIG. 1, the compressed air supply path is indicated by “AEL”. The downstream end of the compressed air supply pipe C2 is branched and connected to the diffuser pipes provided inside the composite function tanks 11 to 14, the concentration cleaning tanks 2 and 2, and the nutrient enhancement tanks 3 and 3, respectively. Moreover, each branch pipe extended toward each of these composite function tanks 11 to 14, the concentration cleaning tanks 2 and 2, and the nutrient enhancement tanks 3 and 3 is provided with an electric valve, and the electric valve is opened and the compressor C1 is opened. Is driven so that compressed air is supplied to each of the composite function tanks 11 to 14, the concentration cleaning tanks 2 and 2, and the nutrient enhancement tanks 3 and 3.

-Concentrated oxygen supply system D-
Next, the concentrated oxygen supply system D will be described. The concentrated oxygen supply system D has a concentrated oxygen supply pipe D2 whose upstream end is connected to the concentrated oxygen supply machine D1. In FIG. 1, the supply path of the concentrated oxygen is indicated by “O ₂ ”. The concentrated oxygen supply pipe D2 includes a supply header D3, and a plurality of branch pipes extend from the supply header D3 toward the composite function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3. In addition, these branch pipes are equipped with motorized valves, and by opening the motorized valves, concentrated oxygen is supplied to each of the composite function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3. Yes. Thereby, even if the density of the rotifer to culture | cultivate becomes high, the inside of the compound function tanks 11-14 and the nutrient enhancement tanks 3 and 3 is made not to run out of oxygen.

-Washing water tank 7-
The cleaning water tank 7 stores a cleaning liquid used when cleaning a flock removal mat 71, the multifunctional tanks 11 to 14, and the nutrient enhancement tank 3 described later.

  In each of the multi-function tanks 11 to 14, flocs composed of garbage and dirt such as rotifer dead bodies and excrement float in the culture solution. Therefore, a fibrous material such as cotton is used in the multi-function tanks 11 to 14. The floc removal mat 71 configured as an elastic body is dipped and the floc is adsorbed to the floc removal mat 71 for removal. Then, the flock removal mat 71 contaminated by adsorbing the flocks in the composite function tanks 11 to 14 is washed by the flock removal mat washing machine 72. At this time, the flock removal mat washing machine from the washing water tank 7 is washed. The floc removal mat 71 is cleaned by the cleaning liquid supplied to the 72 through the cleaning water pipe 73. The cleaning water pipe 73 is provided with a cleaning water pump 74.

  In addition, a cleaning device (not shown) is attached to the multi-function tanks 11 to 14 and the nutrient enhancement tanks 3 and 3, and the tank is cleaned by the cleaning apparatus in a state where the tank is empty after the rotifer culture is completed. Is called. At this time, the inside of the tank is cleaned by the cleaning liquid supplied from the cleaning water tank 7 to the cleaning device.

  In this embodiment, control is performed so that the above-described cleaning operation of the floc removal mat 71 and the cleaning operations of the multifunctional tanks 11 to 14 and the nutrient enhancement tanks 3 and 3 are also automatically executed. For this reason, the work time required for the manual work performed by the worker can be greatly reduced. For example, in the past, 14 hours of work time was required for the cleaning work of the multi-function tanks 11 to 14, which was a manual work, but this system can reduce the work time to 2.5 hours. Further, by automating the manual work, it is possible to reduce and equalize the dispersion of each work, and it is possible to stably culture and feed the rotifer.

-Water level setting structure of multi-function tanks 11-14-
The composite function tanks 11 to 14 are provided with a mechanism for adjusting the water level when the mixed water overflows from the main space 1A to the overflow space 1B. Hereinafter, this mechanism will be described.

  FIG. 5 is a diagram showing the composite function tank 11. 5A is a plan view, FIG. 5B is a cross-sectional view taken along line BB in FIG. 5A, and FIG. 5C is taken along line CC in FIG. 5A. Sectional drawing and FIG.5 (d) are the enlarged views of D section in Fig.5 (a). As shown in these drawings, the overflow space 1B has a partition member 15 having a substantially U-shaped cross section attached to a part of the inner wall of the composite function tank 11, and between the partition member 15 and the inner wall of the composite function tank 11 Thus, the overflow space 1B is formed. And each said piping which enables communication between the composite function tanks 11-14 is connected to the side wall of the composite function tank 11 so that this overflow space 1B may be faced.

  And the rectangular opening 15a is formed in the center part of the width direction of this partition member 15 over the up-down direction, The opening edge of this opening 15a is formed in U shape, This U-shaped part Is configured as partition weir locking portions 15b and 15b. A partition weir 15c having a width dimension that approximately matches the width dimension of the opening 15a is inserted between the partition weir locking portions 15b and 15b, thereby closing the opening 15a. A plurality of types having different lengths are prepared in advance as the partition weir 15c, and when the partition weir 15c having a long length is applied (see the solid line in FIG. 5C), the weir height Is set at a relatively high position, the water level when the mixed water starts to overflow from the main space 1A to the overflow space 1B is set high. That is, a large amount of storage in the main space 1A is set. On the other hand, when the partition weir 15c having a short length is applied (see the broken line in FIG. 5C), the weir height is set at a relatively low position, and therefore the main space 1A to the overflow space 1B. The water level when the mixed water begins to overflow is set low. That is, the storage amount in the main space 1A is set to be small. In this way, it is possible to arbitrarily set the storage amount in the main space 1A by simply replacing the partition weir 15c to be applied. The replacement operation of the partition weir 15c is performed manually by the operator.

-Cultivation and harvesting operation of rotifer in tank unit 1-
Next, the rotifer culture operation and the rotifer harvesting operation in the tank unit 1, which are operations characteristic of the culture system configured as described above, will be described. The rotifer culture operation and the rotifer harvesting operation in the tank unit 1 have a plurality of patterns as described below. For example, the first pattern that matches the number of combined function tanks that function as culture tanks and combined function tanks that function as harvest tanks, the number of combined function tanks that function as harvest tanks rather than the combined function tanks that function as culture tanks There are a second pattern to be set in large numbers, a third pattern in which the number of combined function tanks functioning as harvesting tanks is set smaller than a combined function tank functioning as a culture tank. This will be specifically described below. In addition, in the following description, the case where each compound function tank 11-14 is comprised as a capacity | capacitance which can store a 10 ton culture solution is demonstrated.

(First pattern)
As described above, this pattern is for culturing and harvesting rotifers by matching the number of the composite function tank functioning as a culture tank and the composite function tank functioning as a harvest tank.

  First, only the motor-operated valves respectively provided in the 1-2 pipe 1a and the 3-4 pipe 1b are opened. Thereby, the first composite function tank 11 and the second composite function tank 12 communicate with each other, and the third composite function tank 13 and the fourth composite function tank 14 communicate with each other. In this case, the first combined function tank 11 and the third combined function tank 13 function as a culture tank, while the second combined function tank 12 and the fourth combined function tank 14 function as a harvesting tank. For this reason, before the start of the culture operation, the second composite function tank 12 and the fourth composite function tank 14 are in an empty state.

  When the culturing operation is started, the mixed water of seawater and clean water mixed at a predetermined ratio in advance is supplied from the mixed water tank 6 through the mixed water supply pipe 63 to the first combined function tank 11 and the third combined function tank 13 (both The supply amount per unit time is kept constant (a supply amount of 10 tons per day for each of the tanks 11 and 13) and supplied to the main space 1A of the culture tank.

  As a result of this operation, the water level of the main space 1A rises and the mixed water overflows beyond the partition member 15 (mixed water containing fish organisms for fish farming with a predetermined density) is overflowed in the combined function tanks 11 and 13. It flows into 1B. Then, the mixed water that has flowed into the overflow space 1B of the first composite function tank 11 flows into the overflow space 1B of the second composite function tank 12 via the 1-2 pipe 1a. The water level in the overflow space 1B rises, and the mixed water overflowing beyond the partition member 15 flows into the main space 1A of the second composite function tank 12. In this manner, the rotifer cultured in the first combined function tank 11 is harvested in the second combined function tank 12. Similarly, rotifers cultured in the third combined function tank 13 are also harvested in the fourth combined function tank 14.

  Then, when the mixed water stored in the second composite function tank 12 and the fourth composite function tank 14 reaches a predetermined water level, the electric motors of the harvesting tubes 1h and 1j connected to the bottoms of the composite function tanks 12 and 14 are used. When the valve is opened and the rotifer transfer pump P <b> 1 is driven, the mixed water is drawn from the second combined function tank 12 and the fourth combined function tank 14 at a stretch and supplied to the concentrated cleaning tanks 2 and 2.

  Thereafter, the concentration operation and the cleaning operation are performed in the concentration cleaning tanks 2 and 2, and the concentrated chlorella and nutrients are given in the nutrient-enriched water tanks 3 and 3 for nutritional enhancement (further culture). It feeds to the fish in each fish breeding tank 5,5, ... via the feeding container 42. FIG.

  In this pattern, the system composed of the culture tank and the harvest tank can be configured into two independent systems. For this reason, even if a toxic substance is mixed in any one of the tanks, the feed organism for fish farming can survive in a system different from that tank. For this reason, it can be avoided that the feed organism for fish farming in the system is completely destroyed, and the production capacity of the feed organism for fish farming can be maintained to some extent.

  In the first pattern, the case where two lines composed of a culture tank and a harvest tank are used has been described. Not only this but the system which consists of a culture tank and a harvest tank may be used only one line. For example, the culture operation and the harvesting operation are performed in a state where only the motor-operated valves provided in the 1-2 pipe 1a are opened and the first composite function tank 11 and the second composite function tank 12 are communicated. Is the case. Moreover, in the case of this pattern, the composite function tank which functions as a culture tank and the composite function tank which functions as a harvest tank can be selected arbitrarily. For example, in one system, the second combined function tank 12 functions as a culture tank and the first combined function tank 11 functions as a harvesting tank, while in the other system, the fourth combined function tank 14 functions as a culture tank. And the third combined function tank 13 functions as a harvesting tank.

(Second pattern)
This pattern is the “first combined function tank usage mode” in the present invention, and as described above, sets a larger number of combined function tanks that function as harvesting tanks than combined function tanks that function as culture tanks. Cultivate and harvest rotifers. Here, a case will be described in which there is one multi-functional tank functioning as a culture tank and three multi-functional tanks functioning as harvesting tanks.

  First, only the electric valves provided in the 1-2 pipe 1a, the 1-3 pipe 1c, and the 1-4 pipe 1e are opened. Accordingly, the second composite function tank 12, the third composite function tank 13, and the fourth composite function tank 14 communicate with the first composite function tank 11. That is, three composite function tanks 12, 13, and 14 communicate with one composite function tank 11. In this case, the first combined function tank 11 functions as a culture tank, while the second combined function tank 12, the third combined function tank 13, and the fourth combined function tank 14 function as a harvesting tank. For this reason, before the start of the culture operation, the second composite function tank 12, the third composite function tank 13, and the fourth composite function tank 14 are in an empty state.

  When the culturing operation is started, the mixed water of seawater and clean water mixed in advance at a predetermined ratio passes from the mixed water tank 6 through the mixed water supply pipe 63 to the main space 1A of the first combined function tank 11 (culture tank). The supply amount per unit time is kept constant (a supply amount of 30 tons per day).

  As a result of this operation, the water level in the main space 1A rises and the mixed water overflows beyond the partition member 15 (mixed water containing fish organisms with a predetermined density) is overflowed in the first combined function tank 11. To flow into. The mixed water flowing into the overflow space 1B of the first composite function tank 11 passes through the 1-2 pipe 1a, enters the overflow space 1B of the second composite function tank 12, passes through the 1-3 pipe 1c, and passes through the third composite function tank. 13 overflow space 1B flows into the overflow space 1B of the fourth composite function tank 14 via the 1-4 pipe 1e. The water level in the overflow space 1B of each of the multi-function tanks 12, 13, and 14 rises, and the mixed water that overflows beyond the partition member 15 flows into the main space 1A of each of the multi-function tanks 12, 13, and 14. In this way, the rotifer cultured in the first combined function tank 11 is harvested in the second combined function tank 12, the third combined function tank 13, and the fourth combined function tank 14.

  And when the mixed water stored in these 2nd composite function tank 12, the 3rd composite function tank 13, and the 4th composite function tank 14 reaches a predetermined | prescribed water level, it connects to the bottom part of these composite function tanks 12, 13, and 14 When the motorized valves of the harvesting pipes 1h, 1i, 1j are opened and the rotifer transfer pump P1 is driven, the mixed water is supplied from the second composite function tank 12, the third composite function tank 13, and the fourth composite function tank 14. Is pulled out at a stretch and supplied to the concentrated cleaning tanks 2 and 2.

  Thereafter, the concentration operation and the cleaning operation are performed in the concentration cleaning tanks 2 and 2, and the concentrated chlorella and nutrients are given in the nutrient-enriched water tanks 3 and 3 for nutritional enhancement (further culture). It feeds to the fish in each fish breeding tank 5,5, ... via the feeding container 42. FIG.

  In this pattern, even if the amount of water supply per unit time for the first composite function tank 11 is set large, these can be absorbed by the three composite function tanks 12, 13, and 14 (first composite function tank). 11 is supplied with 30 tons of culture medium per day, but only 10 tons of culture medium per day is stored in each of the three composite function tanks 12, 13, and 14. For this reason, when the breeding speed of the fish feed organisms rapidly increases and the density of the fish feed organisms in the first combined function tank 11 rises rapidly, the amount of the mixed water to be supplied is optimized in order to optimize the density. Even when many are set, it is possible to avoid the situation that the mixed water overflows from the harvesting tank, and the reliability of the system can be improved.

  In addition, when cultivating rotifers with high fertility, even if a large amount of mixed water is set to optimize the density, it is possible to avoid a situation where the mixed water overflows from the harvesting tank. it can.

  In the second pattern, the case where there is one composite function tank functioning as a culture tank and three composite function tanks functioning as a harvest tank has been described. However, the present invention is not limited to this, and it is also possible to configure the system with one composite function tank functioning as a culture tank and two composite function tanks functioning as a harvesting tank. For example, only the electric valves provided in the 1-2 pipe 1a and the 1-3 pipe 1c are opened. As a result, only the second composite function tank 12 and the third composite function tank 13 communicate with the first composite function tank 11, and two composite function tanks 12, A system configuration in which 13 communicates can be realized.

  Also in this pattern, it is possible to arbitrarily select a composite function tank that functions as a culture tank and a composite function tank that functions as a harvest tank. For example, the second combined function tank 12 functions as a culture tank, while the first combined function tank 11, the third combined function tank 13, and the fourth combined function tank 14 function as a harvesting tank.

  The second pattern can be switched from the first pattern. That is, in a situation where the first combined function tank 11 is used as a culture tank and the second combined function tank 12 is used as a harvesting tank, the breeding rate of the fish food organisms in the first combined function tank 11 is rapidly increased. In this case, the 1-3 pipe 1c is provided so that the supply amount of the culture solution to the first combined function tank 11 is increased (for example, doubled), and the third combined function tank 12 is also functioned as a harvesting tank. The operation is such as opening each motorized valve.

(Third pattern)
This pattern is the “second combined function tank usage mode” in the present invention, and as described above, the number of combined function tanks functioning as harvesting tanks is set smaller than the combined function tanks functioning as culture tanks. Cultivate and harvest rotifers. Here, a case will be described in which there are three combined function tanks functioning as culture tanks and one combined function tank functioning as a harvesting tank.

  First, only the motor-operated valves respectively provided in the 1-4 pipe 1e, the 2-4 pipe 1d, and the 3-4 pipe 1b are opened. As a result, the first composite function tank 11, the second composite function tank 12, and the third composite function tank 13 communicate with the fourth composite function tank 14. That is, three composite function tanks 11, 12, and 13 communicate with one composite function tank 14. In this case, the first combined function tank 11, the second combined function tank 12, and the third combined function tank 13 function as a culture tank, while the fourth combined function tank 14 functions as a culture tank. For this reason, before the start of this culturing operation, the fourth combined function tank 14 is in an empty state.

  When the culturing operation is started, the mixed water of seawater and clean water previously mixed at a predetermined ratio passes from the mixed water tank 6 through the mixed water supply pipe 63 to the first composite function tank 11, the second composite function tank 12, and the first. The supply amount per unit time is kept constant (a supply amount of 3 tons per day for each of the tanks 11, 12, and 13) and supplied to the main space 1 </ b> A of the three composite function tanks 13 (both culture tanks).

  As a result of this operation, the water level in the main space 1A of each multi-function tank 11, 12, 13 rises and overflows beyond the partition member 15 (mixed water containing a predetermined density of fish-feeding organisms). It flows into the overflow space 1B of each composite function tank 11, 12, and 13. And the mixed water which flowed into this overflow space 1B flows in into the overflow space 1B of the 4th multifunctional tank 14 through each piping 1e, 1d, 1b. The water level in the overflow space 1B of the fourth composite function tank 14 rises, and the mixed water overflowing beyond the partition member 15 flows into the main space 1A of the fourth composite function tank 14. In this way, rotifers cultured in the first, second, and third combined function tanks 11, 12, and 13 are harvested in the fourth combined function tank 14.

  Then, when the mixed water stored in the fourth composite function tank 14 reaches a predetermined water level, the electric valve of the harvesting pipe 1j connected to the bottom thereof is opened and the rotifer transfer pump P1 is driven, The mixed water is withdrawn from the fourth combined function tank 14 at a stretch and supplied to the concentrated cleaning tanks 2 and 2.

  Thereafter, the concentration operation and the cleaning operation are performed in the concentration cleaning tanks 2 and 2, and the concentrated chlorella and nutrients are given in the nutrient-enriched water tanks 3 and 3 for nutritional enhancement (further culture). It feeds to the fish in each fish breeding tank 5,5, ... via the feeding container 42. FIG.

  In this pattern, the harvesting tank (the fourth combined function tank in the above case) is set while the amount of water supply per unit time for the first, second, and third combined function tanks 11, 12, and 13 is set to be small. 14) can be maintained at a high level (even if only 3 tons of culture medium is supplied to each of the first, second, and third combined function tanks 11, 12, and 13 per day, The combined function tank 14 stores 9 tons of culture medium per day). For example, even if the breeding rate of fish feed organisms is drastically reduced and the amount of feed water must be kept low in order to maintain the density of fish feed organisms in the culture vessel, Increasing the amount makes it possible to maintain a high yield and maintain a high system productivity.

  In addition, when cultivating a rotifer having a low fertility, even when the amount of mixed water supplied is set low in order to optimize the density, the yield can be kept high.

  In the third pattern, the case has been described in which there are three composite function tanks functioning as culture tanks and one composite function tank functioning as a harvest tank. However, the present invention is not limited to this, and it is possible to configure the system with two composite function tanks functioning as culture tanks and one composite function tank functioning as a harvesting tank. For example, only the motor-operated valves respectively provided in the 1-4 pipe 1e and the 2-4 pipe 1d are opened. As a result, the first composite function tank 11 and the second composite function tank 12 communicate with the fourth composite function tank 14, and one composite function tank 14 is connected to the two composite function tanks 11 and 12. System configuration can be realized.

  Also in this pattern, it is possible to arbitrarily select a composite function tank that functions as a culture tank and a composite function tank that functions as a harvest tank. For example, the first, second, and fourth combined function tanks 11, 12, and 14 function as culture tanks, while the third combined function tank 13 functions as a harvesting tank.

(Failure response pattern)
Next, a description will be given of a corresponding pattern when a failure occurs in any one of the multifunctional tanks when the culture operation and the harvesting operation are performed as described above. Here, when the culture operation and the harvesting operation are performed in the first pattern (while the first composite function tank 11 and the third composite function tank 13 function as the culture tank, the second composite function tank 12 and The response | compatibility operation | movement when a failure generate | occur | produces in the 2nd compound function tank 12 is demonstrated when the 4th compound function tank 14 is functioning as a harvest tank.

  If a failure occurs in the second composite function tank 12 when the culture operation and the harvesting operation are performed in the first pattern, the second composite function tank 12 cannot be used as a harvest tank. For this reason, the electric valve of 1-2 piping 1a which has connected the 1st compound function tank 11 and the 2nd compound function tank 12 is closed, and it replaces with it and the 1st compound function tank 11 and the 4th compound function tank The motorized valve of the 1-4 pipe 1e connected to 14 is opened. That is, the 1st compound function tank 11 and the 4th compound function tank 14 are connected by 1-4 piping 1e. Thereby, the 1st compound function tank 11 can be used as a culture tank, and the harvesting tank corresponding to it can be used as the 4th compound function tank 14. For this reason, even after the second composite function tank 12 has failed, the culture operation in the first composite function tank 11 can be continuously performed. Conventionally, when such a failure occurs, the culture period in the culture tank is prolonged while repairing the failed tank, and the environment in the tank is deteriorated. There was a possibility of annihilation. According to this embodiment, the failed tank can be replaced with another tank quickly, and the harvest efficiency can be maintained.

  This operation can also be applied when a toxic substance is mixed in the second multifunctional tank 12 used as a harvesting tank. In other words, when it is detected that a toxic substance is mixed in the second composite function tank 12, the same motor-operated valve switching operation as described above is performed so that the rotifer is not discharged into the second composite function tank 12. To do. Thereby, the amount of rotifers killed can be reduced, and the harvest efficiency can be maintained.

  In the above description of the operation, the case where a failure occurs in the multi-function tank used as a harvest tank or a toxic substance is mixed is described. However, the present invention is not limited to this, and it is also possible to deal with a case where a failure occurs in a multi-function tank used as a culture tank or a toxic substance is mixed. For example, if a failure occurs in the first composite function tank 11 when the culture operation and the harvesting operation are performed in the first pattern, the culture operation in the first composite function tank 11 cannot be performed, and the second composite function There is a possibility that the mixed water supply to the tank 12 is cut off, and the breeding here proceeds to become over-density. In this case, the electric valve of the 1-2 pipe 1a connecting the first composite function tank 11 and the second composite function tank 12 is closed, and instead, the third composite function tank 13 and the second composite function tank The motor-operated valve of the 2-3 pipe 1f connected to 12 is opened. That is, the 3rd compound function tank 13 and the 2nd compound function tank 12 are connected by 2-3 piping 1f. Thereby, the 3rd compound function tank 13 can be used as a culture tank, and the harvesting tank corresponding to it can be used as not only the 4th compound function tank 14 but the 2nd compound function tank 12. For this reason, the mixed water supply to the second composite function tank 12 is maintained, and the harvesting operation of the second composite function tank 12 can be continuously performed. This operation can also be applied when a toxic substance is mixed in the first combined function tank 11 used as a culture tank.

  In addition, when a malfunction occurs in a multi-function tank used as a harvest tank or a toxic substance is mixed, the multi-function tank that has been used as a culture tank until then is regarded as a harvest tank and is regarded as a harvest tank. Further, it is possible to operate such that the mixed water is extracted from the combined function tank and supplied to the concentrated cleaning tanks 2 and 2. This operation is applicable not only when the culture / harvest operation is performed in the first pattern, but also when the culture / harvest operation is performed in the second and third patterns.

-Other examples-
In the embodiment described above, the case where the present invention is applied to a system for cultivating a rotifer has been described. The present invention can be similarly applied not only to rotifers but also to systems for culturing other fish-feeding organisms such as floating diatoms.

  In the embodiment described above, the tank unit 1 is constituted by the four composite function tanks 11 to 14, but the tank unit may be constituted by three composite function tanks or five or more composite function tanks. Good.

  In addition, as a form of use of the culture system according to the present invention, a well-known planting culture method or continuous culture method is conventionally used by setting the communication state between the composite function tanks and the flow state of the culture solution between the composite function tanks. It is also possible to apply.

It is a piping system diagram of a culture system concerning an embodiment. It is the schematic which shows the internal structure of a composite function tank. It is the schematic which shows the internal structure of a concentration washing tank. It is the schematic which shows the internal structure of a nutrient enhancement tank. (A) is a plan view, (b) is a cross-sectional view taken along line BB in FIG. 5 (a), (c) is a cross-sectional view taken along line CC in FIG. 5 (a), and (d). FIG. 6 is an enlarged view of a portion D in FIG.

Explanation of symbols

11 1st compound function tank 12 2nd compound function tank 13 3rd compound function tank 14 4th compound function tank 1a 1-2 piping 1b 3-4 piping 1c 1-3 piping 1d 2-4 piping 1e 1-4 piping 1f 2-3 piping 6 mixed water tank 8 chlorella storage tank 81 chlorella feeding pump 82 chlorella feeding pipe

Claims (5)

A system for cultivating fish feed organisms,
Three or more composite function tanks having a function as a culture tank and a function as a harvest tank are connected to each other by piping, and function as a culture tank by switching the communication state between the composite function tanks by these pipes. The number of combined function tanks and the number of combined function tanks that function as harvesting tanks can be arbitrarily switched.
While introducing the culture solution into the combined function tank functioning as the above culture tank, the culture solution containing the fish feed organisms discharged from the combined function tank is harvested in the combined function tank functioning as the harvest tank A culture system for feed organisms for fish farming, characterized in that A system for cultivating fish feed organisms,
Four or more composite function tanks having a function as a culture tank and a function as a harvest tank are connected to each other by piping, and function as a culture tank by switching the communication state between the composite function tanks by these pipes. The first combined function tank usage mode that increases the number of combined function tanks that function as harvest tanks rather than the number of combined function tanks, and the combined function tank that functions as harvest tanks rather than the number of combined function tanks that function as culture tanks It is configured to be arbitrarily switchable with the second combined function tank usage form that reduces the number of
While introducing the culture solution into the combined function tank functioning as the above culture tank, the culture solution containing the fish feed organisms discharged from the combined function tank is harvested in the combined function tank functioning as the harvest tank A culture system for feed organisms for fish farming, characterized in that In the culture system for fish feed organisms according to claim 1 or 2,
The piping that connects the multiple function tanks to each other is provided with an open / close valve, and the communication state between the multiple function tanks can be switched by switching the open / close of the open / close valves. Culture system for fish feed organisms. In the culture system of the fish-feeding organism according to claim 1, 2, or 3,
When the number of multi-function tanks that function as harvesting tanks is set to a plurality, a feeding device that feeds the feed organism for fish farming is provided in the multi-function tanks that function as harvesting tanks. A culture system for live fish feed organisms. In the culture system of the fish feed organism according to any one of claims 1 to 4,
The culture solution is a mixed water of seawater and clean water,
A water supply device for supplying mixed water to the multi-function tank functioning as a culture tank is provided, and this water supply device is provided with a mixed water tank. A culture system for feed organisms for fish farming, wherein a mixing ratio of seawater and clean water can be arbitrarily set by separately performing a water supply operation.

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