JP2007020501A - Method for culturing fish and shellfish - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To regulate use of the conventional medical agents such as disinfectant, bactericides, etc., by using water produced by electrolysis specified as a measure to bacteria, disease germ adhering or parasitic on feed organisms for sea fish and shellfish such as rotifer, floating diatoms, etc. <P>SOLUTION: The invention relates to the method for culturing sea fish and shellfish by feeding feed organisms to the sea fish and shellfish in the fish farm, wherein the cultured and collected feed organisms are concentrated, the concentrated feed organisms are washed with the water produced by electrolysis which is produced from sea water or diluted sodium chloride solution by electrolysis and having sterilizing potential of 0.3-3.0 mg/L of active chlorine concentration, and then supplied to the sea fish in a state suspended in the water produced by electrolysis of sea water or diluted salt solution and subjected to the active chlorine removing treatment or in a sterilized sea water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a marine fish culture method for feeding marine seafood by feeding feed organisms for seafood such as rotifers and floating diatoms to marine seafood in a farm.

  As a method for cultivating marine seafood, there is a method of feeding and cultivating feed organisms for seafood such as rotifers and floating diatoms. This type of aquaculture method is carried out, for example, in an aquaculture farm that intensively grows and grows marine seafood, an example of which is patented under the name of “automatic culture and feeding system for fish farming organisms”. An application has been filed (see Patent Document 1).

  The feeding system uses rotifers and floating diatoms as feed organisms for fish farming, a culture process for cultivating fish feed organisms, a concentration process for concentrating the cultured fish feed organisms, and a concentrated fish feed organism. And a feeding process of feeding to the farm and feeding.

  By the way, in this feeding system, rotifers and floating diatoms that are feed organisms for fish farming often have bacteria or pathogenic bacteria that affect marine fish and shellfish attached or parasitized. When pathogenic bacteria are brought into the farm together with the fish feed organisms, the water quality of the farm is deteriorated, and the marine fish and shellfish during the farming are adversely affected. Therefore, a means for dealing with these bacteria and pathogens is required. However, the feeding system is equipped with a washing process for washing each water tank as a means for dealing with dirt in each water tank constituting each process, but means for dealing with bacteria and pathogens is not provided. I do not have.

  In aquaculture of marine seafood, drugs such as disinfectant and disinfectant are generally used to deal with bacteria and pathogens, and the disinfectant and disinfectant are added to the aquaculture water, or aquaculture Means are taken to bring the fish and shellfish in contact with chemicals such as disinfectants and disinfectants. For this reason, also in the said feeding system, use of chemical | medical agents, such as a disinfectant and a disinfectant, can be considered as a means to cope with the bacteria, pathogen, etc. which adhere to or parasitize a wasim and floating diatom. However, rotifers and floating diatoms are extremely weak organisms against drugs, and there are major problems with the use of drugs such as normal disinfectants and disinfectants. In the near future, there is a high probability that measures for prohibiting the use of these food ingredients such as disinfectants and disinfectants will be taken.

On the other hand, as a result of earnest research on the means for dealing with bacteria and pathogens in aquaculture water for marine organisms, the present inventors have found that for bacteria and pathogens in aquaculture water for marine organisms, It has been found that electrolytically produced water having a bactericidal ability obtained by electrolyzing salt water is extremely effective. Based on such knowledge, the present inventors have completed an invention named “water for cultivating marine organisms, production method and apparatus for cultivating water” (see Patent Document 2).
JP 2000-23594 A JP 2003-144001 A

  The present invention has been made based on the knowledge that electrolyzed water having a bactericidal ability obtained by electrolyzing seawater or dilute salt water is extremely effective against bacteria, pathogens, etc. in aquaculture water for marine organisms. The main purpose is to use the specified electrolytically generated water as a countermeasure against bacteria and pathogens that adhere to or parasitize feed organisms for marine seafood such as rotifers and floating diatoms.

  The present invention is a method for cultivating marine seafood, in which feed organisms for seafood are fed to marine seafood in a farm to cultivate marine seafood. The method for aquaculture of marine seafood according to the present invention captures and concentrates cultured feed organisms, has an antibacterial ability produced by electrolyzing the concentrated feed organisms with seawater or dilute brine, and has an effective chlorine concentration Is produced by electrolyzing seawater or dilute salt water to remove effective chlorine, or electrolyzed water from which effective chlorine has been removed, or by washing with electrolyzed water in the range of 0.3 mg / L to 3.0 mg / L, or It is characterized by being suspended in sterilized seawater, supplied to a marine seafood farm in a suspended state, and fed to marine seafood in aquaculture water. In the method for culturing marine seafood according to the present invention, rotifers or floating algae can be adopted as the feed organism for marine seafood.

  According to the method for cultivating marine seafood according to the present invention, bacteria and pathogens that adhere to or parasitize feed organisms can be adversely affected without using conventional disinfectants and disinfectants. There is an advantage that it can be sterilized and cleaned very effectively. In addition, feed organisms that have been sterilized or sterilized in this way are supplied to the farm in a state of being suspended in a suspension medium that is substantially aseptic or very nearly aseptic. The introduction of electrolyzed water having sterilizing ability into the aquaculture is regulated, and the growth of microalgae and the like in the aquaculture water of the aquaculture is not affected. Microalgae and the like are equivalent to feed organisms and greatly contribute to the cultivation of marine seafood.

  The present invention is a method for cultivating marine seafood, in which feed organisms for seafood are fed to marine seafood in a farm to cultivate marine seafood. The method for cultivating marine fish and shellfish according to the present invention mainly involves washing and feeding fish and shellfish feed organisms with electrolyzed water having a bactericidal ability. In the aquaculture method according to the present invention, rotifers and floating algae can be adopted as fish and shellfish feed organisms. For example, rotifers are usually grown in a primary culture that increases the number of individuals, followed by a secondary culture that enhances nutrients, and then the culture solution is filtered and captured and concentrated using plankton nets. . In general, concentrated feed organisms are supplied as they are to the farm and fed to marine fish and shellfish.

  In the aquaculture method according to the present invention, the feed organism cultured, captured and concentrated as described above is washed with electrolyzed water having sterilizing ability produced by electrolyzing seawater or dilute brine, and then seawater Alternatively, electrolyzed dilute salt water that has been treated to remove effective chlorine, or suspended in sterilized seawater, and suspended and supplied to the aquaculture farm, and the ocean in the aquaculture water Feeds seafood. However, as the electrolytically generated water (electrolytically generated water for cleaning) used for cleaning feed organisms, one having an effective chlorine concentration in the range of 0.3 mg / L to 3.0 mg / L is used.

  The 1st production | generation method which produces | generates the electrolysis production | generation water for washing | cleaning is a method of electrolyzing a diaphragm using the filtered seawater or dilute salt water as electrolyzed water. According to this method, weakly acidic to substantially neutral electrolytically generated water having an effective chlorine concentration in the range of 0.3 mg / L to 3.0 mg / L can be obtained. The 2nd production | generation method which produces | generates the electrolysis water for washing | cleaning is the method of diaphragm membrane electrolysis using the filtered seawater or dilute salt water as electrolyzed water. According to this method, strongly acidic electrolytically generated water is generated in the anode electrolysis chamber of the diaphragm electrolytic cell. Since the electrolyzed water has a high effective chlorine concentration, it is diluted with seawater that has been filtered and / or sterilized so that the effective chlorine concentration is in the range of 0.3 mg / L to 3.0 mg / L. Adjust. Thereby, although it has the bactericidal ability with respect to bacteria and a pathogenic microbe, the electrolysis water for washing | cleaning very suitable which does not have a bad influence on the rotifer which is a feed organism is obtained.

  Rotifers washed with electrolyzed water for washing are supplied to the farm in a suspended state in suspension medium. The suspension medium to be used is effectively produced by electrolyzing seawater or dilute salt water. Use electrolyzed water from which chlorine has been removed or seawater that has been sterilized. As a method of removing effective chlorine from the electrolytically generated water, there is a method of adding a neutralizing agent such as sodium thiosulfate to the electrolytically generated water to be treated, decomposing the chlorine component, and volatilizing and removing, It is a simple and advantageous method. As another method, there is a method of applying a negative pressure to the electrolytically generated water to be treated to promote the volatilization of the chlorine component, and removing the volatilized chlorine component by suction. There is a method in which gas is bubbled to promote the volatilization of the chlorine component and the volatilized chlorine component is removed by suction. The concentrated rotifer washed with the electrolyzed water for cleaning having sterilizing ability is supplied to the farm in a state suspended in the suspension medium, so the electrolyzed water for cleaning having sterilizing ability is supplied. Is not brought into the farm, and the influence of the electrolysis water for washing on the culture water can be prevented.

  FIG. 1 schematically shows a series of flows (systems) for feeding rotifers as feed organisms to fish and shellfish from the culture of rotifers. The rotifer which is a feed organism is cultured in the rotifer culture tank 11 by a known method, and the rotifer cultured in the rotifer culture tank 11 is captured by the plankton net 12, filtered and concentrated. The concentrated rotifer is carried into the washing tank 13 and washed with the electrolytically generated water for washing in the washing tank 13. The washed rotifer is carried into the suspension tank 14. In this system, the diaphragm electrolysis method is employed as the electrolytic generation water for cleaning (first generation unit).

  The electrolytically generated water is electrolytically generated in the diaphragm electrolyzer 15. As the electrolyzed water for non-diaphragm electrolysis, filtered seawater is used, and the electrolyzed seawater is supplied to the electrolyzed electrolysis tank 15 through the supply line 15a, undergoes electrolysis, and is generated. A part of the generated electrolytically generated water is introduced into the washing tank 13 through the outflow line 15b as cleaning electrolytically generated water, and another part of the generated electrolytically generated water passes through the outflow line 15c and becomes effective chlorine. Is supplied to a removal treatment tank 16 for removing water. The electrolytically generated water for cleaning introduced into the cleaning tank 13 cleans the concentrated rotifer carried into the cleaning tank 13, and is drained after the cleaning.

  The electrolytically generated water introduced into the removal treatment tank 16 is added with sodium thiosulfate, which is a neutralizing agent, from the storage tank 17 that stores the neutralizing agent that is interposed in the middle of the outflow pipe 15c. It introduce | transduces in the removal processing tank 6 in the state which mixed sodium. The introduced chlorine component of the electrolytically generated water reacts with sodium thiosulfate in the removal treatment tank 16 to be decomposed and volatilizes as chlorine gas, and the volatilized chlorine gas is removed by suction. Thereby, the electrolyzed water sufficiently removes effective chlorine and is introduced into the suspension tank 14 as a suspension medium. A rotifer which is a washed feed organism is carried from the washing tank 13 into the suspension tank 14. The introduced rotifer is sufficiently suspended in the suspending medium in the suspension tank 14 and is supplied to the aquaculture water in the aquaculture farm 18 in a suspended state. Thereby, the rotifer which is a feed organism is fed to the marine seafood in the aquaculture water in the farm 18.

  FIG. 2 shows a second means for generating electrolysis water for cleaning. The said 2nd means takes the diaphragm membrane electrolysis system which uses the filtered seawater as electrolyzed water. The diaphragm electrolyzer 21 is a well-known electrolyzer, and filtered seawater as electrolyzed water is supplied to each electrolysis chamber of the diaphragm electrolyzer 21 through a supply pipe 21a, and a strong acid in the anode-side electrolyzer. Electrolyzed water is produced, and strongly alkaline electrolyzed water is produced in the cathode side electrolysis chamber. The strongly acidic electrolyzed water generated in the anode side electrolysis chamber is introduced into the mixing tank 22 through the outflow pipe 21b, and the strongly alkaline electrolyzed water generated in the cathode side electrolysis chamber is the outflow pipe 21c. Through the system.

  On the other hand, the filtered seawater similar to the water to be electrolyzed is introduced into the mixing tank 22 through the supply line 22a, mixed with the strongly acidic electrolytically generated water in the mixing tank 22 to dilute the electrolytically generated water, The effective chlorine concentration is adjusted in the range of 0.3 mg / L to 3.0 mg / L. The electrolytically generated water whose effective chlorine concentration is adjusted in the mixing tank 22 is introduced into the cleaning tank 13 shown in FIG. 1 as cleaning electrolytically generated water through the outflow pipe 22b. A part of the seawater flowing through the supply pipeline 22a is introduced into the suspension tank 14 shown in FIG. 1 as a suspension medium through the branch pipeline 22c branched from the supply pipeline 22a.

  FIG. 3 shows a third means for generating electrolysis water for cleaning. The third means adopts a diaphragm membrane electrolysis system using dilute saline prepared to a predetermined concentration as electrolyzed water. The diaphragm electrolyzer 31 is a known electrolyzer, and dilute saline as electrolyzed water is introduced through the supply line 31a at a site upstream of each electrolysis chamber in the diaphragm electrolyzer 31. It is prepared by mixing tap water and saline introduced from the saline tank 32 at a predetermined ratio. The prepared dilute saline solution is supplied to each electrolysis chamber as electrolyzed water, strong acid electrolysis water is generated in the anode electrolysis chamber, and strong alkaline electrolysis water is generated in the cathode electrolysis chamber. Generated. The strongly acidic electrolyzed water generated in the anode side electrolysis chamber is introduced into the mixing tank 33 through the outflow pipe 31b, and the strongly alkaline electrolyzed water generated in the cathode side electrolysis chamber is the outflow pipe 31c. Through the system.

  On the other hand, the filtered seawater is introduced into the mixing tank 33 through the supply pipe 33a, mixed with the strongly acidic electrolytically generated water in the mixing tank 33 to dilute the electrolytically generated water, and the effective chlorine concentration is reduced to 0. Prepare in the range of 3 mg / L to 3.0 mg / L. The electrolytically generated water whose effective chlorine concentration is adjusted in the mixing tank 33 is introduced into the cleaning tank 13 shown in FIG. 1 through the outflow pipe 33b as cleaning electrolytically generated water. A part of the seawater flowing through the supply pipe 33a is introduced into the suspension tank 14 shown in FIG. 1 as a suspension medium through the branch pipe 33c branched from the supply pipe 33a.

It is a system diagram which shows typically the feed system of the feed organism in the culture method which concerns on this invention. It is a schematic diagram which shows typically the 2nd means to produce | generate the electrolysis water for washing | cleaning employ | adopted with the said culture method. It is a schematic diagram which shows typically the 3rd means to produce | generate the electrolysis water for washing | cleaning employ | adopted with the said culture method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Culture tank, 12 ... Plankton net, 13 ... Washing tank, 14 ... Suspension tank, 15 ... Non-diaphragm electrolysis tank, 15a ... Supply line, 15b, 15c ... Outflow line, 16 ... Removal treatment tank, 17 ... Neutralizing agent storage tank, 18 ... aquaculture tank, 21 ... diaphragm electrolyzer, 21a ... supply line, 21b, 21c ... outflow line, 22 ... mixing tank, 22a, 22c ... supply line, 22b ... outflow line 31 ... Separative membrane electrolytic cell, 31a ... supply line, 31b, 31c ... outflow line, 32 ... saline tank, 33 ... mixing tank, 33a, 33c ... supply line, 33b ... outflow line.

Claims (2)

A method for aquaculture of marine seafood that feeds seafood feed organisms to marine seafood on a farm to cultivate marine seafood. Is washed with electrolytically produced water having an sterilizing ability and an effective chlorine concentration in the range of 0.3 mg / L to 3.0 mg / L, which is produced by electrolyzing seawater or dilute salt water, Electrolyzed water produced by electrolyzing dilute salt water to remove effective chlorine, or suspended in sterilized seawater and supplied to the farm in a suspended state, marine seafood in aquaculture water A method for cultivating marine seafood, characterized by feeding the fish. 2. The method for cultivating marine seafood according to claim 1, wherein the feed organism fed to the marine seafood is a rotifer or a floating algae.

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