JPH10309147A - Copper ion-generating device for culturing fish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a copper ion-generating device capable of efficiently generating copper ions in a net crawl for culturing fishes to fill the crawl with copper ion- containing water and maintaining the copper ion concentration for a specified time without highly flowing out the copper ions from the net crawl. SOLUTION: Plural copper electrodes 2 are suspended along the inside surfaces of mutually faced nets in a net crawl 1 for culturing fishes, and an electric wire 16 for a positive electric current and an electric wire 15 for a negative electric current are alternately connected the adjacent electrodes. The other end of the electric wire for the positive electric current and the other end of the electric wire for the negative electric current are connected to the positive and negative ends of an electric source box 17, respectively, disposed on a raft 10 floated on the sea surface. Air bubbling pipes 3 for aeration are disposed below the outsides of the electrodes, and connected to an air distribution pipe 4, whose other end is connected to an air compressor 5 disposed on the raft floated on the sea. Devices 11 for winding up water-impermeable films 7 having weights attached to the tips, respectively, are disposed along the upper and outer surfaces of the mutually faced nets of the net crawl suspended from the raft floated on the sea, so that the devices 11 can arbitrarily extend the films 7 in the sea at the faced two places, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for killing pathogenic bacteria and killing pathogenic parasites in water for the treatment and prevention of diseases of aquaculture nets and cultured fish in a culture tank. The present invention relates to a copper ion generator capable of generating and diffusing and filling an aquaculture net or a water tank with copper ion water and maintaining a copper ion concentration for a certain period of time.

[0002]

2. Description of the Related Art Conventionally, when a disease of a fish has occurred in an aquaculture net or an aquaculture tank, a method of treating the fish by mixing the feed with the feed and treating the disease with a high concentration solution of a sterilizing and insecticide chemical. There is a method called a medicine bath in which fish are released for several hours to eliminate parasites attached to the fish, and to kill and cure pathogenic bacteria. Due to the overcrowding of the nets and cultivation tanks, fish diseases are transmitted quickly and most of the fish can be transmitted in a few days. In fish farming, the shipping rate of fish is 50-60 due to death due to disease. %. In puffer fish farming, it is said that good results are obtained when 50% can be shipped due to the damage caused by white spot insects.

[0003] Conventionally, a chemical bath method in the case of a net for cultivation uses a method in which a person dives with a sheet in the net, and drives a fish into the sheet, and turns the sheet to reduce the amount of water therein. Thus, a high concentration of drug-dissolved water is made with a small amount of chemicals, and the fish is bathed for a short time of about 1 hour. The medicinal bath of fish in the net ikesu is usually performed three to four times every few days because the effect is small once.

[0004] For this reason, a lot of manpower and cost are required. Therefore, recently, a large quantity of a formalin drug, which is a harmful substance that eliminates parasites without putting a sheet, is directly injected into the net ikesu. Parasite control is not effective if the drug concentration is low, so to maintain 200 ppm of the drug concentration required for control, add the amount of drug flowing out from the mesh and add more than 10 times the amount of formalin drug doing. The concentrated drug solution used in the medicine bath diffuses into the sea and causes phytotoxicity in the sea area, and the death of a large number of pearl-cultured shellfish and shellfish, which are vulnerable to drugs, has become a major social problem. .

Conventionally, two metals are suspended as electrodes in a solution that easily conducts electricity, and when a direct current is applied to each electrode, a current flows between the anode and the cathode. It is known that it dissolves as ions and elutes in water, adheres to a cathode electrode, and forms a film by lamination. If gold is used as the anode electrode and iron is used as the cathode electrode, gold is plated on iron.

[0006] The copper ion generator is a device which can be used by increasing the distance between the anode and the cathode, and taking out the copper ions eluted from the anode in a structure in which the ions are difficult to adhere to the cathode. The alloy is made of copper and the cathode is made of iron or stainless steel electrodes.

[0007]

DISCLOSURE OF THE INVENTION The present invention is directed to an effective treatment and prevention of diseases of farmed fish in a culture net.
Finding ways to kill pathogens in water and kill pathogenic parasites without formalin, without phytotoxicity, and without human intervention, and to develop effective methods of medicine bath treatment. Is the purpose.

When an electrode is installed in a seawater supply pipe to generate copper ions, chlorine and copper in the seawater react with each other, and copper chloride adheres to the cathode electrode and is difficult to remove. The aim is to develop a method for efficiently removing copper chloride.

[0009]

In order to achieve the above object, the present invention utilizes copper ions, which are less toxic than formalin but have sterilizing and insecticidal properties, in place of formalin, which is highly toxic and harmful. I do. In order to compensate for the weakness of the copper ion toxicity and increase the effect with a small amount of use, diffuse a thin concentration of copper ions into the culture net, and fill the Ikes with copper ion sterilized water and fill it for 3 hours or more. By taking a medicine bath, the fish will not be seriously damaged, and sterilization and insecticidal effects will be ensured.

In addition, in order to prevent the loss of the medicine by a simple operation without much labor, a diffuser tube is arranged outside the copper electrode, and an air curtain is stretched by the jet air to generate a rising water flow. The copper ions generated by energizing the copper electrode suspended inside the trachea do not flow out of the air curtain, stay there, do not adhere to the cathode electrode, and diffuse upward to diffuse copper ions. The ion concentration can be increased without waste.

Further, in order to prevent copper ions, which have been diffused and ascended by the rising water flow, from flowing out of the aquaculture net on the sea surface, an impermeable film is formed from the sea surface to a depth of several meters below the sea surface. It stretched along the four sides of the net to allow all rising water to flow inward at the sea surface to promote equalization of copper ion concentration.

Further, a water-impermeable film that can be rolled up and rolled down can be stretched on the bottom of the culture net, so as to prevent the copper ions from dissipating from the bottom and to be gradually uniformized by aeration by air aeration. Then, the copper ion concentration increases, so that the inside of the net ikesu can be filled with a high concentration of copper ions.

[0013] As described above, the slow rise of the copper ion concentration while homogenizing does not cause abrupt damage to the fish. Water drops do not cause fish burns or poisoning.

In the present invention, only two or more rod-shaped or plate-shaped copper or copper alloys are used as electrode materials.
Metals other than copper, such as iron and stainless steel, are not used as electrodes. Since the use of multiple electrodes increases the number of sites where copper ions are simultaneously generated, copper ions can be easily dispersed in the sea,
Further, the concentration of copper ions generated from one electrode is reduced, and the required concentration is obtained, so that fish is safe.

A large number of electrodes are arranged such that electrodes adjacent to each other are arranged alternately with electrodes for positive current and electrodes for negative current, and a direct current is applied to each electrode to elute copper ions on the anode side. After a temporary power outage after the specified time has passed, a negative current is applied to the electrode that was passing the positive current,
A positive current is applied to the electrode through which the negative current was flowing. Furthermore, this switching can be automatically repeated.

When a positive current is applied to the negative current electrode, copper chloride which adheres to the negative current electrode and starts to solidify,
Since the negative current electrode dissolves and flows away due to dissolution, the copper chloride adhered to the electrode does not need to be stripped.

The copper ion concentration used in this copper ion generator is about 0.04 ppm, and is not higher than that of formalin.
The present invention proposes a copper ion generator for aquaculture nets that does not cause harm in the adjacent sea area because it is not used at a concentration as high as 0 ppm.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a marine aquaculture net ikesu is a raft composed of floats floating on the sea surface.
It is suspended at 0 ▼. The size of the net ikesu is generally 10 m in length, 10 m in width, and 10 m in depth.

1 m inside the net surface of the net ikesu, a length of 2 m. The lower end of a 30mm diameter pure copper round bar is 1m from the net bottom
Four electrodes a to d were suspended at equal intervals so as to be on top. Further, the same number of electrodes are similarly suspended on the facing mesh surface by e to h. c. e. g. A positive current wire (16) is connected to each electrode of b.
d. f. h. A negative current wire (15) was connected to each of the electrodes.

The other end of the electric wire (16) for supplying a positive current is
The other end of the electric wire (15) for passing a negative current was connected to the anode terminal of the power supply box (17) installed on the marine raft (10), and the other end was connected to the cathode terminal of the power supply box (17). A photovoltaic power generation panel (18) was attached to the upper part of the power supply box (17) to charge the storage battery in the power supply box (17).

A diffuser is installed below each suspended electrode, at the corner between the mesh bottom and the side of the mesh, and each diffuser is connected to a blower, and this end is connected to a raft (10) at sea. It was connected to the installed air compressor.

On the net bottom of the net net, the storage line (13) guided by the pulling line guide b is wrapped like an accordion curtain at a corner of the net bottom near b. Impervious film for net bottom which was stored ▲ 14
▼ is the stretch rope led by the pull rope guide a ▲ 12
Pulled out and expanded by ▼.

A water-impermeable film winding device (11) was installed on the offshore raft (10) outside the culture net Ikes, and a weight (19) was attached to the tip of the film. The lock of the winding device (11) was released, and the film 7 was lowered to a depth of 1 m and stretched. Further, a film winding device (11) was similarly installed on the marine raft (10) outside the facing net surface, and the film 7 was lowered to a depth of 1 m and stretched.

[0024]

EXAMPLE A white spot disease occurred during the cultivation of 1500 puffer fish with an average length of 10 cm, and a copper ion generator according to the present invention was installed in a net Ikes, which died about 20 fish daily, and air aeration was started. The current supply was started at a current value of 1 A. 3 hours 48
After one minute, the copper ion concentration became 0.05 ppm. Since the blowfish seemed to be a little restless, we turned off electricity. After 2 hours, the blowfish was settled down.
It was 3 ppm.

When current is intermittently applied at a current value of 350 mA,
Since it was found that a copper ion concentration of 0.03 ppm can be maintained, a copper ion medicine bath was carried out for 8 hours every day during the day for 1 week. As a result, no fish died around the 4th day, and the fish was examined at the end of the experiment by microscopic examination. No white spots were found, confirming the complete cure of the disease.

During the experiment, seawater outside the net Ikes was periodically collected every day and the copper ion concentration was measured, but no significant difference was found.

[0027]

Since the present invention is configured as described above, it has the following effects.

[0028] It is possible to effectively treat the diseased fish with a medicine bath and to prevent the phytotoxicity caused by the conventional large dose of formalin which is a deleterious substance.

Since the fish can be bathed without netting or chasing the fish, it does not cause stress or rubbing of the fish, so that the fish is less likely to get sick and can be bathed easily. This will help improve the survival rate of cultured fish.

Since the work can be performed by two people, it is useful to greatly reduce labor costs.

[Brief description of the drawings]

FIG. 1 shows a plan view of an embodiment of the present invention.

FIG. 2 shows a side view of an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Net ikesu 2 ... Electrode copper 3 ... Aeration pipe 4 ... Blower pipe 5 ... Air compressor 6 ... Trainer guide 7 ... Impermeable film 8 ... Sea water surface 9 ... Floating 10 ... Sea raft 11 ... Not Water permeable film winding device 12 ... Tension line 13 ... Storage line 14 Impermeable film for net bottom 15 ... Negative current wire 16 ... Positive current wire 17 ... Power supply box 18 ... Solar power generation panel 19 ... Weight 20 ... Bubble

Claims (5)

[Claims] 1. In marine culture, two or more rod-shaped or plate-shaped copper or copper alloys are brought into contact with each other along the outer or inner circumference of the net for cultivation, or along the inside of each side of the aquarium in shore culture. A copper ion generator which can be suspended in seawater as an electrode at arbitrary intervals and a direct current is supplied to the electrode from a power source to dissolve copper on the anode side and elute it into seawater as copper ions. 2. An air diffuser having an ejection port for ejecting air in a bubble state below the outside of the electrode,
A copper ion generator capable of connecting a blower tube from an air compressor installed in a floating workplace attached to a culture net ikesu to the air diffuser tube to ventilate and blow foamy air from the air diffuser tube. 3. A water-impermeable film-shaped screen curtain which can be rolled up and rolled down from the sea on four sides of the aquaculture net to the underwater side surface and bottom surface.
A copper ion generator having a function that can be extended. 4. The power supply according to claim 1, which has a function of alternately energizing the electrodes adjacent to each other as an electrode for a positive current and an electrode for a negative current. In addition, a negative current can be supplied to the electrode that has passed the positive current, a positive current can be supplied to the electrode that has passed the negative current, and further, a function of repeating this operation has been provided, and a function of adjusting the current value has been provided. Copper ion generator. 5. The power source stores power supplied from a generator with an engine, a solar thermal power generator, a wind power generator, a wave power generator, and the like in a storage battery, and uses the power to generate a predetermined power. A copper ion generator equipped with a function that can supply each electrode.