JPH06153744A - Method for diminishing parasite of fishes and bacterium and removing living thing attached to crawl net - Google Patents

Abstract

PURPOSE:To diminish and remove parasite of fishes, bacteria and crawl net- attached living thing by which fishes are damaged. CONSTITUTION:Electrodes compased of a titanium anode 5a and a titanium cathode 5b are provided in a water tank 2 which fishes are cultured and direct current is allowed to flow from sodium hypochlorite concentration controlling and generating device 5 to generate residual chlorine in natural sea water and the residual chlorine is arbitrarily controlled. Thereby, parasite of fishes and bacteria and crawl-attached living thing in the water tank 2 are diminished and removed to protect fishes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the killing of various adherent organisms that attach to parasites that cause aggravation of cultured fish, such as beetle and cage nets, and prevent the circulation of seawater to reduce the oxygen concentration in cages. The present invention relates to a method for killing fish parasites and bacteria and removing organisms attached to fish cage nets for the purpose of removing and protecting cultured fish.

[0002]

2. Description of the Related Art In recent years, in marine aquaculture, parasites such as bedbugs parasitic on yellowtail, amberjack and the like have been generated in various places along the coast of Japan, and have seriously damaged aquaculture. This is because the ban on the use of organotin antifouling agents markedly increased the number of organisms attached to the cage net, which made the tide worse and resulted in a decrease in the amount of dissolved oxygen in the cage, a decrease in the amount of cultured fish fed, and This is because it becomes a place where stress is generated and the eggs of parasites such as beetles are settled, which makes it easier to suffer from parasitic diseases and bacterial diseases. On the other hand, if the conventional net change, fresh water bath, high salt water bath, chemical bath, etc. are performed, the cost and labor required for these are a great burden.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The method of exterminating fish parasites and bacteria is to concentrate fishes after the parasites parasitize them and take a chemical bath, or to land a cage net to which the egg mass of organisms adheres. There are three main methods, such as renewal and new one, and spraying chemicals to kill floating larvae, but these methods cannot completely remove them. That is, when a fish is concentrated in a narrow space and subjected to a medicinal bath, the fish body is damaged and oxygen deficiency occurs, and due to the increase in the weight of the fish body, the labor force increases (normal scale). However, it is difficult to treat 100% by regular treatment (every 10 people are required) and regular treatment (every 10 to 20 days), so parasites and cage net-adhering organisms remain, and one parasite again produces 300 eggs. As a result, the damage caused by parasites cannot be extinguished. In addition, due to the parasite infestation, there is no countermeasure against bacterial diseases caused by scratching the fish net on the net. With the new replacement of the cage net, the weight of the cage net increases due to diatoms, mussels, red barnacles, etc. attached to the cage net, which makes it difficult to pull the cage net up. In addition to this, because the mesh is small, tidal flow deteriorates, where the dissolved oxygen amount decreases and the fish weaken and the growth is delayed,
Egg masses from parasites are more likely to attach. Therefore, it is difficult to kill parasites because they have a good spawning site. In addition, replacing this with a net requires a lot of labor and cost, and if this is not done, the stress generation and bacterial diseases in fish in a hypoxic environment will increase. Egg masses of parasites attached to fish stored in fish cage nets hatch in 5 days at a water temperature of 25 ° C after they attach to the nets and can float freely as larvae and move freely. obtain. If food is stopped to prevent this, the fish body will be weakened, so the only option is to spray the drug in water, but considering the toxicity and persistence to fish, dilution of the concentration in water, etc., the drug that is useful and requires immediate effect is currently I can't find it. Also,
No countermeasures are found for bacterial diseases. As described above, the three methods cannot be expected to be effective even if they are implemented, but since there is no other countermeasure, they can only be continued, and they are extremely problematic methods that repeat the vicious circle as described above. The present invention has been made in view of the above-mentioned conventional problems, and is excellent in killing fish parasites, bacteria and fish cage net-adhering organisms that are safe for both humans and fish, and at the same time It is an object of the present invention to provide a method of erasing fish parasites and bacteria and removing organisms attached to fish cage nets, which can be reduced in quantity, and can be carried out easily and continuously for a long period of time.

[0004]

In order to achieve the above-mentioned object, in the method of killing fish parasites and bacteria and removing organisms attached to cage nets according to claim 1 of the present invention, an anode and a cathode are used. The electrode is installed in natural seawater within the habitat of the fish, direct current is applied to the electrode to generate sodium hypochlorite, and the residual chlorine concentration in the natural seawater is adjusted to kill the fish. The method of killing and removing the fish parasites and bacteria and the organisms attached to the cage nets was adopted.

Further, in the method for killing fish parasites and bacteria and removing organisms attached to fish cage nets according to claim 2, an electrode formed by an anode and a cathode is provided inside and outside the floating cage in natural seawater, and a direct current is applied to the electrode. A method of killing and removing fish parasites, bacteria and fish cage net-adhering organisms that kill fish stored in the cage by adjusting the residual chlorine concentration in the cage by applying an electric current to generate sodium hypochlorite. Adopted.

In the method for killing fish parasites and bacteria and removing organisms attached to fish cage nets according to a third aspect of the present invention, an electrode formed of an anode and a cathode is provided on the floating buoy, and a direct current is applied to the electrode to apply the current. We adopted a method of intensively killing and removing fish parasites and bacteria and fish cage net attachment organisms by generating sodium chlorite and adjusting the residual chlorine concentration in seawater.

Further, in the method for killing fish parasites and bacteria and removing organisms attached to fish cage nets according to claim 4, the natural seawater provided on a ship is formed by an anode and a cathode in a tank which can be directly sucked and discharged into the fish cage. A direct current is applied to the electrode to generate sodium hypochlorite in the tank to adjust the residual chlorine concentration in the tank, and the water inside the tank is returned to the water in the fish cage to repel fish parasites, bacteria, and fish cages. The method of killing and removing the net-attached organisms was adopted.

The method for killing fish parasites and bacteria and removing the organisms attached to cage nets according to claim 5,
In the method for killing fish parasites and bacteria and removing organisms attached to cages according to 2, 3 or 4, an electrode formed of an anode and a cathode for generating copper ions is provided in addition to the electrode for adjusting the residual chlorine concentration. A method of killing and removing fish parasites and bacteria and organisms attached to the cage net by applying a direct current to the electrode to generate copper ions in seawater was adopted.

[0009]

The method of killing fish parasites and bacteria and removing the organisms attached to the nets according to the first aspect of the present invention has the following effects. The present invention has a chlorine concentration of 18.
980 ppm is converted to the production of sodium hypochlorite by electrolysis, and this sodium hypochlorite is voluntarily made to be, for example, 1 ppm to 2 ppm as residual chlorine, thereby increasing the residual chlorine in natural seawater to an arbitrary concentration. The presence of chlorine makes it possible to utilize the disinfection effect of chlorine, and the contribution to the fishery is extremely large. It is only to increase chlorine, which is a constituent element of natural seawater, as residual chlorine by electrolysis using natural seawater,
Since such residual chlorine returns to natural seawater after the disinfection and sterilization actions, it does not cause any harm or side effect to the natural environment. Generally, the pH of seawater is about 8, but the reduction of residual chlorine in seawater is observed due to the reaction with reducing inorganic substances and organic substances in seawater, or photochemical reaction, so that the bactericidal effect is maintained. Therefore, it is necessary to continuously generate sodium hypochlorite. Therefore, the present invention has a stable generation mechanism of sodium hypochlorite that can eliminate interference due to PH in natural seawater, and also has an effect of maintaining the bactericidal effect of residual chlorine.

In the method for killing fish parasites and bacteria and removing organisms attached to fish cage nets according to a second aspect of the present invention, an electrode formed of an anode and a cathode is provided inside and outside the floating cage in natural seawater or river water to provide a direct current. By energizing the outside of the cage, it is possible to kill the organisms attached to the cage net to prevent a decrease in the amount of dissolved oxygen in the cage, and inside the cage there is a double effect of killing the parasites and bacteria of the housed fish. Occur. Since the floating cages are assembled not in a single unit but in a unit of tens to hundreds, it is necessary to perform work such as moving and retracting cages when conventional fish parasites, bacteria, and cage-net attachment organisms occur. It will disappear and you will be able to farm with confidence. In addition, because sodium hypochlorite is generated in a large number of cages, even if the tidal current changes, fish parasites, bacteria, and cage net-adhering organisms have died due to residual chlorine in the vicinity, so it can be considered harmless. The effect occurs. Impacts on distant surrounding waters can be ignored because residual chlorine returns to natural seawater.

In the method for killing fish parasites and bacteria and removing organisms attached to fish cage nets according to claim 3 of the present invention, the above-mentioned anode and cathode are provided on the floating buoy, and a direct current is applied to the electrodes so that Generate sodium chlorite and adjust the concentration. Since this floating buoy can move in the same way as fish parasites, bacteria, and fish cage-attached organisms, the residual chlorine concentration can be arbitrarily adjusted even in shallow water levels or rocky reef areas where ships cannot move. Because it can be adjusted, it produces effects in concentrated waters such as fish parasites, bacteria, and cage net attachment organisms.

[0012] In the method for killing fish parasites and bacteria and removing living fish net adhering organisms according to claim 4 of the present invention, the ship is directly moved to the area where the generation of fish parasites and bacteria and living fish net adhering organisms is confirmed. Then, the fish parasites and bacteria, organisms attached to cage nets, etc. are killed while orbiting the generation area. Ships have a wide range of action and have a large initial effect on the development of fish parasites, bacteria, and cage net attachment organisms.

In the method for killing fish parasites and sterilization of bacteria and removing organisms attached to cage nets according to claim 5 of the present invention, sodium hypochlorite is added to the natural seawater, inside and outside floating cages, floating buoys, ship tanks and the like. In addition to the method of generating by electrolysis of copper, copper ion concentration in each natural seawater is 3p
By using a high concentration of pb, for example, 30 ppb in combination with sodium hypochlorite, the sterilization and killing removal effect is about 2
It is possible to reduce the copper ion concentration to 1/2 and the sodium hypochlorite concentration to 1/2, thereby reducing the concentration. Therefore, there is a great synergistic effect that power consumption and electrode consumption can be reduced. Copper ions and chlorine are both present in natural seawater, and after killing, they are returned to natural seawater and reused, so there is no pollution of the natural environment.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, the first embodiment will be described with reference to FIG. FIG. 1 shows a general cultivated water tank 2 provided adjacent to the sea surface 9. The sea tank 9 is separated from the sea surface 9 by a door 7 that separates a seawall 8 from natural seawater or river water. It is a structure that can be exchanged. Then, even if the fish parasites and bacteria, organisms attached to fish cage nets 4 enter the water intake by opening and closing the door 7, a method of killing the fish parasites and bacteria attached to fish 3 and organisms attached to fish nets 4 adopt. That is, the adjusting tank 2a is connected by a pipe in the order of the intake pipe 1a, the pump 1, and the water supply pipe 1b to take in natural seawater or river water.
In this adjusting tank 2a, a titanium anode 5a and a titanium cathode 5b connected to the sodium hypochlorite concentration adjusting generator 5 by an electric wire 6 are provided, and a direct current is generated by the sodium hypochlorite concentration adjusting generator 5. By energizing, sodium hypochlorite is generated as shown in the following formula.

Generation of Sodium Hypochlorite Chemical formulas 1 to 4 show cathodic reactions.

[Chemical 1]

[0016]

[Chemical 2]

[0017]

[Chemical 3]

[0018]

[Chemical 4]

Chemical formula 5 shows an anodic reaction.

[Chemical 5]

As a whole

[Chemical 6]

NaOH generated at the cathode and Cl generated at the anode
₂ reacts to generate sodium hypochlorite.

[Chemical 7]

With this generated sodium hypochlorite,
Kill fish parasites, bacteria, organisms attached to cage nets, etc. in the aquarium 2. In this case, the concentration of residual chlorine in the natural seawater decreases slowly with time, but can be stably supplied by continuously electrolyzing the seawater.

In this case, even if fish parasites, bacteria, organisms attached to fish cage nets 4, etc. enter the aquarium 2, they can be killed by adjusting the residual chlorine concentration in natural seawater to 0.5 ppm or more. At the same time, floating parasites of fish parasites in water also die.

Next, a second embodiment will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals. In this example, the floating cage is provided with a sodium hypochlorite concentration adjusting generator, a titanium anode and a titanium cathode, and sodium hypochlorite is generated inside and outside of the floating cage to cause fish parasites, bacteria, and cage net attachment organisms, etc. It prevents the invasion of and kills them. Levitation cage 10 that floats on the sea surface 9 by a float 11.
a, 10b, 10c generate a direct current with the sodium hypochlorite concentration adjusting generator 5 provided on the upper part of the walking board 12,
By energizing the titanium anode 5a and the titanium cathode 5b suspended in the cage with the electric wire 6, sodium hypochlorite is generated inside and outside the cage, and kills fish parasites and bacteria and organisms attached to the cage net from the outside. In addition to preventing invasion, it also kills and removes adherent parasites of fish contained inside. The sodium hypochlorite concentration adjusting and generating device 5 of this device can be installed on land to generate a similar sterilizing effect of residual chlorine when the floating cage on the sea surface is close. Floating cages are usually fixed on the sea, so that in addition to the effect as a single substance, residual chlorine diffuses as an aggregate, which synergizes as a stronger bactericidal effect. When the titanium anodes 5a and the titanium cathodes 5b are alternately arranged in FIG. 3, an electric current is generated so as to circulate on the inner peripheral surface of the floating cage, and fish parasites, bacteria, fish cage net attachment organisms, etc. No matter which direction it enters, it will be completely killed by the residual chlorine generated all around. Also, in order to be able to sufficiently cope with the change of tidal current, it is considered that the outermost tidal current side floating cage can be provided with a titanium anode 5a or a titanium cathode 5b outside.

Next, a third embodiment will be described with reference to FIG. The drawing shows that the floating buoy 15 is left in the sea area where fish parasites, bacteria, and fish cage net attachment organisms, etc. It is carried into a concentrated sea area of fish parasites, bacteria, and fish net-adhering organisms, and a direct current is supplied from the built-in battery to the titanium anode and titanium cathode provided on the lower surface of the buoy to generate sodium hypochlorite and generate fish parasite. It kills insects, bacteria, organisms attached to cage nets, etc. The floating buoy 15 floats on the sea surface 9 together with fish parasites, bacteria, and cage net attachment organisms 4, and the direct current generated by the built-in battery 16 is passed through the electric wire 6 to generate the sodium hypochlorite concentration adjustment generator 5 By titanium anode 5
a, sent to the titanium cathode 5b to generate sodium hypochlorite and kill fish parasites, bacteria, organisms attached to cage nets and the like. In addition, the utility pole 1 is installed by the timer-17 that is built in at the same time.
Electric power is transmitted to the electric lamp 13 provided in No. 4 and is turned on only at night. Fish parasites in complex waters are housed in a strong case that can generate enough sodium hypochlorite even in low water levels, rocky areas, and other difficult water passages, and can be turned on at night. In addition, it is possible to automatically kill bacteria and organisms attached to the cage net. The battery 16 can be charged by a solar cell and a wave power generator for long-term use. It can also be equipped with a buoy location transmitter. The location of fish parasites, bacteria, and fish net-adhering organisms, etc. can be determined by adopting this method because the basin of fish parasites, bacteria and fish-netting organisms may change subtly due to wind direction, wind force, tidal current, and waves. Along with the effect of grasping, the killing effect is synergized. Since the fish parasites and bacteria and organisms attached to the fish nets move along with the wind and water currents regardless of the depth of the water, the floating buoy has the effect of migrating along with the fish parasites and bacteria and organisms attached to the fish net.

Next, a fourth embodiment will be described with reference to FIG. The drawing shows a tank that is equipped with a suction pipe for fish parasites and bacteria, organisms attached to cage nets, drainage pipes, and a sodium hypochlorite concentration adjustment generator on a ship that moves in natural seawater or river areas.
By suspending titanium anode and titanium cathode from the top of the tank in the tank and generating sodium hypochlorite, fish parasites and bacteria in the tank and organisms attached to cage nets are killed, and wastewater with high residual chlorine concentration Is released into the concentrated sea area of fish parasites, bacteria, and fish cage net attachment organisms, etc. to produce a double effect of killing fish parasites, bacteria, fish cage net attachment organisms, and the like. That is, from the water suction box 18 provided inside the ship 19, the intake pipe 1a, the pump 1, the water supply pipe 1
Water is sent to the tank 20 via b, and the titanium anode 5a and the titanium cathode 5b in the tank 20, which are connected to the sodium hypochlorite concentration generator 5 by the electric wire 6, are energized to enter the tank 20 into the hypochlorous acid. Generates soda. The fish parasites, bacteria, organisms attached to the cage nets, and the like that have died inside the tank 20 are discharged to the sea surface 9 by the drainage pipe 21. In this case, since the water depth of fish parasites, bacteria, and organisms attached to fish cage nets is about 4m, it is possible to efficiently inhale from the water level where fish parasites, bacteria, organisms attached to fish cage nets, etc. 4 are concentrated. It shall be possible to adjust the water intake by installing multiple water suction boxes by changing the above. The ship 19 is assumed to be capable of sequentially dying in order to find fish parasites, bacteria, organisms attached to cage nets, etc., and to move sequentially. Conventionally, there is no definite measure for killing fish parasites, bacteria, and cage-net adhering organisms, etc. Has the effect of killing.

Next, a fifth embodiment will be described with reference to FIG. FIG. 6 shows a state in which a copper electrode 5c and an iron electrode 5d are provided in addition to the electrodes for generating sodium hypochlorite provided on the floating cage 10a, and the wires 6 are connected to the copper ion concentration generator 22. . With this copper ion concentration generator 22, the copper electrode 5
c, by supplying a direct current to the iron electrode 5d, copper ions 23 having an arbitrary concentration are generated. In this case, since sodium hypochlorite is also generated, it is possible to generate residual chlorine having a disinfecting effect, for example, by generating copper chloride CuCl ₂ to which copper ions are added, as compared with the case where chlorine is only 5 ppm. The combination of 2.5 ppm and 0.15 ppm of copper chloride results in a longer residual chlorine connection and doubles the bactericidal effect. As a matter of course, in practice, this value is within the regulation value and no pollution occurs. In this case, if the generation of copper ions is adjusted to 30 ppb, which is the Seto Inland Sea seawater standard value for copper ions, the copper ions will penetrate into the body of parasites, microorganisms, algae, etc., coagulate protoplasts, and leave one residue. Chlorine Cl ₂ (H
Cl, ClO) to 500 ppb to kill bacteria instantly, even 200 ppb to kill in 10 minutes,
Also, diatoms are 500 ppb-1ppm, and protozoa are 3
It was killed at 1 ppm from 00 ppb. When the floating cage 10a is made of metal, the floating cage 10a can be used as a cathode instead of the iron electrode 5d. In this case, the fish parasite larvae and egg mass are directly attached to the floating cage net, so in addition to the bactericidal effect, the energization effect and the separation of the cathode and anode by the successive generation of hydrogen gas causes the exfoliation. As it produces an effect, it is more easily killed and separated from wire mesh.

The following effects are obtained in the above embodiment. (1) In the medicinal bath, the fish is also damaged, so that there is a time restriction. However, if the sodium hypochlorite of the present invention has an electrochemical action of 500 ppb or more, the fish is not damaged. Conversely, the effect of killing parasites on fish occurs. In addition, dead fish parasites, bacteria and organisms attached to cage nets sink to the seabed. (2) As for the effect of killing shellfish as adhering organisms, the larvae of red barnacles were killed at 250 ppb 6 minutes. Also, the oyster larvae were killed at 200 ppb 7 minutes, and the blue mussel larvae were killed at 500 ppb 10 minutes.
The shellfish as a living cage net attachment organism can be completely removed in the larva. (3) Similarly, the diatom, which is a large damage to the cage net as an attached organism, was killed by copper ions at 500 ppb for 10 minutes. (4) Red tide (Gymnodinium, Mikimotoi) swelled and died instantly with 50 ppb of sodium hypochlorite. Similarly, Shatonella and Antica also died. In this case, by adding 20 ppb of copper ion, sodium hypochlorite exhibited a killing effect at 20 ppb.

[Table 1] Under the above-mentioned conditions, fish parasites (Haddamushi: Benedenia, Ceriora), fish cage net-adhering organisms, etc. died in 10 minutes. Sea-submerged fish parasites and fish cage net-adhering organisms serve as food for the biological chain on the seabed, but are non-polluting.

As described above, in the method of generating direct current through the electrode provided in water to generate sodium hypochlorite, fish parasites and bacteria and fish parasites causing damage to fish cage net attachment organisms, etc. Oxygen in environmental water due to bacterial toxicity of fish and fish attached to fish cage nets, generation of toxic substances due to decomposition of fish parasites and bacteria and fish attached to fish nets, large amount of fish parasites and generation of bacteria and fish attached to fish nets. Insufficiency, mechanical disorders of respiration due to parasitism of fish and shellfish epidermis and gill, and stress, etc. are mentioned. Since there was no method to deal with damage such as organisms attached to fish and cage nets, it was possible to take a positive approach by withdrawing. In recent years, the import of aquaculture seedlings from foreign countries has increased the number of seeds and seedlings that are dispersed in various places and become sick while being contaminated with bacterial diseases. Have. In the future, the dream of the aquaculture business and natural fishery as a life plan for the fishermen in the future will not be endangered, so the succession of young people will not occur, and this method is expected to have a long-term effect. it can.

Although the embodiment of the present invention has been described in detail with reference to the drawings, the present invention includes a specific method of the present invention and a specific design change of members and devices used in the method. . For example, the sodium hypochlorite concentration can be arbitrarily set, and individual killing optimum values can be set for many types recognized as fish parasites, bacteria, fish cage net attachment organisms, and the like.

The material of the anode and the cathode is arbitrary, and for example, iron material such as stainless steel or graphite can be used. It is also possible to add a platinum coating or an oxide coating to the titanium electrode.

The DC power source for electrolysis can also be supplied by a solar cell, a wave power generator, or the like.

The shape of the anode or the cathode can be arbitrarily set, such as a block shape or a linear shape. Further, when the cage net is used as a metal for the electrode, the cathode part and the anode part may be mixed.

The copper electrode 5c and the iron electrode 5d are provided in addition to the electrode for generating sodium hypochlorite to adjust the concentration of copper ions in the sea in the floating cage 10a. It can also be performed in a livestock tank, a floating buoy, a tank, or the like.

[0035]

EFFECTS OF THE INVENTION In the method for killing fish parasites and bacteria and removing organisms attached to cage nets according to claim 1 of the present invention, since the above-mentioned method is adopted, fish parasites which have not been conventionally improved or improved. Bacteria and fish parasites are extremely low in price compared to labor costs, drug costs, including difficult handling methods related to use for killing and removing organisms attached to fish cages, storage, large-scale transportation, large-scale single release, etc. It also has the effect of completely sustaining the effect of killing and removing bacteria and organisms attached to cage nets, and of making the work unmanned. Further, the present invention is an epoch-making invention capable of producing pollution-free sodium on the site of sodium hypochlorite used as a bactericidal agent for food products by electrolyzing seawater in the sea. Since the effect is outstanding while using it within the standard value, it is possible to solve the damage amount, the difficulty of successors, the mental, artificial and financial burdens currently placed by fishermen all at once. In particular, juvenile fish for seed and seedling production and intermediate breeding have a remarkable effect because they are vulnerable to fish parasites, bacteria, and organisms attached to cage nets.

In the method for killing fish parasites and bacteria and removing organisms attached to cage nets according to claim 2 of the present invention, since the above method is adopted, offshore aquaculture is the mainstream of the current fishing industry, and the book before shipment is used. When a floating cage that is most likely to be exposed to aquaculture cages is subjected to a concentrated attack of fish parasites, bacteria, or fish cage net-attached organisms, the damage amount is in the unit of billions of yen and it takes several years to grow. Since the fish that have disappeared are completely wiped out in one day, mental fatigue of the fishermen is also great, but in order to fix multiple floating cages in a concentrated manner, a walking board or a work boat is placed at the fixed interval, and next to the upper part of it. Damage can be prevented in advance by coping with fluctuations in tidal current by placing a sodium chlorite concentration generation control device and arranging a positive electrode and a negative electrode outside and inside the floating cage. In addition, as the power generator, a solar cell, a wave power generator, a diesel power generator, or the like is used, and electric power can be easily obtained on the ocean. The hydrogen gas generated in the electrodes has the effect of promoting convection. Marine organisms adhering to the nets of floating cages are stripped by residual chlorine, which improves tidal flow, resulting in better removal of leftover food and excrement from the bottom of the cage, and the effect of removing parasites. There is a synergistic effect that occurs.

According to the method for killing fish parasites and bacteria and removing organisms attached to fish nets according to claim 3 of the present invention, a direct current of a battery provided on a floating buoy in a concentrated water area of fish parasites and bacteria and organisms attached to fish nets. Levitating buoys are moved by the tidal current in a concentrated water area such as fish parasites, bacteria, and cage net attachment organisms while the current is applied to the positive and negative electrodes under the buoy via the sodium hypochlorite concentration generator. Since they can move together with living fish parasites and bacteria and organisms attached to cage nets, the residual chlorine effect can be synergistically exerted. Since fish parasites, bacteria, and fish cage net-attachment organisms pass through shallow water levels and narrow waterways, they are left in places where it is difficult to track them by ships, etc. If there is a problem, for example, a group of floating cages, etc., will be placed in multiple places as galleries, and there will be the effect of completely killing them.

In the method for killing fish parasites and bacteria and removing the organisms attached to fish cage nets according to the fourth aspect of the present invention, fish parasites and bacteria and fish cages are collected from a concentrated area of fish parasites and bacteria and organisms attached to fish cage nets by ship. It moves with net-attached organisms and concentrates in the densest place to generate a high concentration of sodium hypochlorite, which can be instantly killed, and is a large capacity sodium hypochlorite concentration adjustment generator It is effective to prevent damage to fishes by equipping them with fish parasites, bacteria, and organisms attached to fish cage nets. Removal of other fish parasites, bacteria, fish cage net-attached organisms, red tides, and other fish parasites under development and investigation (aggregation by clay spraying)
In addition, it is cheaper and more reliable than countermeasures such as inactivation of toxicity of fish parasites, bacteria and organisms attached to cage nets (development of antidote), oxygen supplementation (installation of vinyl sheet and installation of oxygen disperser), etc. In addition, it has an effect of predominantly killing fish parasites, bacteria and organisms attached to the cage net at an early stage.

In the method for killing fish parasites and bacteria according to claim 5 of the present invention and for removing organisms attached to fish cage nets, the method described above is used. Therefore, sodium hypochlorite is used in an aquarium, floating cage, floating buoy, tank or the like. In addition to generating water, electrolysis of natural seawater by direct current to generate copper ions. Therefore, chlorine and copper ions, which are elements contained in natural seawater, can be made to have high concentrations to double the bactericidal effect. it can. Further, since the generated ion concentration may be low, the power consumption can be reduced. The residual concentration of chlorine will continue as copper chloride for a long time due to its combination with copper ions,
A synergistic effect of the sterilizing ability of copper ions and chlorine is obtained. In addition, generation of copper ions and sodium hypochlorite, and by continuing this generation work to adjust the concentration of copper ions and residual chlorine in natural seawater, fish parasites and bacteria, and fish cage net attachment organisms were completely eliminated. A great synergistic effect of dying can be obtained. When the metal net is used as an electrode for generating copper ions, the egg mass attached to the fish net by energization,
The larvae are killed, and the exfoliation effect by gas generation is synergized. Therefore, in addition to the method of generating sodium hypochlorite by electrolysis of seawater in natural seawater, inside and outside floating cages, floating buoys, ship tanks, etc. Cost reduction with elimination
It can greatly contribute to the growth of fish.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an apparatus used for a method according to claim 1 of the present invention.

FIG. 2 is an explanatory view showing an apparatus used for the method according to claim 2 of the present invention.

FIG. 3 is an explanatory view showing an apparatus used for the method according to claim 2 of the present invention.

FIG. 4 is an explanatory view showing an apparatus used for the method according to claim 3 of the present invention.

FIG. 5 is an explanatory view showing an apparatus used for the method according to claim 4 of the present invention.

FIG. 6 is an explanatory view showing an apparatus used for the method according to claim 5 of the present invention.

[Explanation of symbols]

 2 Fermented water tank 3 Fish 4 Fish parasite and bacteria, fish cage net attachment organisms 5 Sodium hypochlorite concentration adjusting generator 5a Titanium anode 5b Titanium cathode 5c Copper electrode 5d Iron electrode 10a Floating cage 10b Floating cage 10c Floating cage Buoy 16 Battery 19 Ship 20 Tank 21 Drain pipe 22 Copper ion concentration adjustment generator

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location C02F 1/46 A 9344-4D 1/50 101

Claims (5)

[Claims] 1. An electrode formed of an anode and a cathode is provided in natural seawater in the habitat of fish, and a direct current is applied to the electrode to generate sodium hypochlorite, whereby residual chlorine in the natural seawater is generated. A method for eradicating fish parasites and bacteria and removing organisms attached to fish cages, which comprises killing and removing fish parasites and bacteria that cause fishes to die, and organisms attaching fish cage nets by adjusting the concentration. 2. An electrode formed of an anode and a cathode is provided inside and outside the floating cage in natural seawater, and a direct current is applied to the electrode to generate sodium hypochlorite to adjust the residual chlorine concentration in the cage. A method for killing fish parasites and bacteria and removing organisms attached to fish cages, which comprises killing and removing fish parasites and bacteria and organisms that adhere to fish cage nets, thereby killing fish contained in cages. 3. A floating buoy is provided with electrodes formed of an anode and a cathode, a direct current is passed through the electrodes to generate sodium hypochlorite, and the residual chlorine concentration in seawater is adjusted to control fish parasites and A method for killing fish parasites and bacteria and removing organisms attached to fish nets, which is characterized by intensively removing bacteria and organisms attached to fish nets. 4. In a tank, which is installed in a ship and can directly inhale and discharge natural seawater into the cage, a direct current is applied to an electrode formed by an anode and a cathode to generate sodium hypochlorite in the tank Killing and removing fish parasites and bacteria and organisms attached to fish cage nets by adjusting the residual chlorine concentration in the tank and returning the water inside the tank to the water inside the fish cages. Method of removing attached organisms. 5. The method for killing fish parasites and bacteria and removing organisms attached to fish cage nets according to claim 1, 2, 3 or 4, in addition to the electrode for adjusting the residual chlorine concentration, an anode for generating copper ions. And an electrode formed of a cathode, by applying a direct current to the electrode to generate copper ions in seawater, the fish characterized by killing and removing fish parasites and bacteria and organisms attached to the cage net Method of killing parasites and bacteria and removing organisms attached to cage nets.