JPH03200705A - Hydrogen peroxide preparation to be used in water and use thereof - Google Patents

Abstract

PURPOSE:To obtain the subject preparation absolutely harmless to fish and shellfish, easily applicable and effective for the prevention, extermination or remedy for skin diseases of marine culture fish caused by parasites and pathogenic microorganisms by impregnating hydrogen peroxide water having a specific concentration into a porous carrier. CONSTITUTION:The objective preparation can be produced by impregnating a hydrogen peroxide water having a concentration of 3-10% (preferably 5-7%) into a powdery, granular pellet or spherical porous carrier composed of an inorganic material or a combination of inorganic material and organic material and optionally enclosing the product in a vessel made of a material impermeable to said carrier and permeable to liquid water. The preparation sufficiently releases hydrogen peroxide in water and uniformly disperses the peroxide throughout the water area. Accordingly, it can be easily applied at reduced manpower and cost. Furthermore, the effect of hydrogen peroxide can be fully exhibited to culture fish such as young yellowtail or grown yellowtail to remarkably attain the above effects.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to an underwater hydrogen peroxide preparation and its use.

More specifically, the present invention relates to a filtered hydrogen oxide preparation that can be easily used for the prevention, extermination, or treatment of skin diseases caused by parasites or pathogenic bacteria in fish cultured in seawater or freshwater, and uses thereof.

(b) Problems to be solved by conventional techniques and inventions When parasites infest yellowtail, yellowtail, etc. in seawater farms, their growth is inhibited, and eventually they die, or even if they do not die, their bodies are reduced. The product value will decrease due to discoloration. Such parasites include Benedenia, a body surface parasite.
5eriolae and Heteraxine parasitic on cod leaves
The two main types are heterocerca. This tendency for parasites to attach to fish bodies is more pronounced in small-scale cultivation methods in which a certain sea surface is divided with fishing nets according to the type of fish to be cultured or the level of growth of the fish in waters where the influence of open ocean water is relatively strong. The damage caused has become a problem.

To exterminate parasites on fish farms, it is necessary to carry out extermination treatments periodically, taking into consideration the life history schedule of the parasites, including the formation of parasitic eggs, and the difference in the extermination effect on fish and eggs. However, freshwater bathing and concentrated salt bathing have been known as countermeasures since ancient times (Shuzou Egusa, Kouseisha Koukaku, published May 10, 1980, "Fish Infectious Diseases JP-468, P- 47
2) Also, a chemical bath method is being considered as a method of using pesticides (Shizuoka Fisheries Experiment Station, 1966 Research Report on Fish Disease Countermeasures) Benedeni Hoshina-r.
a 5eriolae”), etc.). but,
The well-known freshwater bathing method and concentrated salt bathing method have an impact on the ecology of fish because the salt concentration of the treated water is different from that of seawater, and there is the inconvenience of having to transport the water to the aquaculture farm where the treatment is carried out. This poses significant practical difficulties, especially when processing large quantities of fish.

On the other hand, the medicated bath method uses sodium peroxide pyrophosphate, sodium percarbonate, disodium peroxide phosphate, formalin, glacial acetic acid, etc., although not necessarily recommended in terms of power, as described in the above-mentioned literature. It is an attempt to exterminate parasites from the fish body by utilizing the action of drugs such as, and the corresponding effect has been confirmed, and the above-mentioned freshwater bath,
This method can partially solve the disadvantages of the concentrated salt water bath method. However, the drugs that have been tested in conventional medicinal bathing methods and whose medicinal efficacy has been recognized have drawbacks in their use based on their chemical and physical properties. Furthermore, like the freshwater bathing and concentrated salt bathing methods, the chemical bathing method involves housing fish in a certain area and treating them; however, these chemical agents may become alkaline in seawater and change the properties of the seawater. It may be poorly soluble in seawater, or it may form inorganic precipitates in seawater that may adhere to fish catfish and cause breathing difficulties, so careful consideration must be given to the way they are used in consideration of the impact they may have on the ecology of fish. . In particular, since it is poorly soluble in seawater, it is necessary to prepare a solution dissolved in freshwater in advance, which poses serious problems in terms of equipment and labor when used in large quantities. This cannot be said to be an implementation method. On the other hand, there is no known method to effectively exterminate red tide when it approaches a fish farm.

(c) Means to solve the problem In light of the above circumstances, we are conducting an investigation to find a drug formulation and its uses that are completely harmless to fish and shellfish and can be easily used when used underwater. As a result, we have arrived at this invention.

According to the present invention, an underwater hydrogen peroxide preparation is provided, which is obtained by impregnating a porous carrier with 3 to 10% hydrogen peroxide solution. Also provided is a method for treating cultured fish using the formulation, among other uses.

The concentration of hydrogen peroxide used in the formulation of this invention ranges from 3 to
Preferably it is 10%. In particular, it has been found that 5 to 7% is practically preferable. If the concentration is 3% or less, a large amount of the preparation is required in order to expect the desired effect of hydrogen peroxide, which is not preferable.

Moreover, if it is 40% or less, although it is preferable in terms of effectiveness, there are problems particularly in terms of handling and release of hydrogen peroxide from the preparation.

In this invention, the porous carrier means, as long as it is porous,
It may be either inorganic or organic. It is generally preferable that the specific gravity is higher than that of freshwater or seawater, but as described below, when used in a container,
The specific gravity may be lower than that of freshwater or seawater.

Examples of the inorganic porous carrier include natural minerals such as diatomaceous earth, kaolin, bentonite, and zeolite, or processed products of these minerals; and porous bodies made of artificial inorganic materials such as granulated slag and cement.

Examples of the organic porous carrier include foams made of only synthetic resin and foams made of synthetic resin and the above-mentioned inorganic substances.

The shape of the porous carrier may be granular, granular, pellet, spherical, or the like. However, the size thereof is preferably an outer diameter of about 0.1 to IOIIIm.

Further, the porous carrier may have fine pores on its surface as a result of being formulated and granulated into the above-described shape, and may have a space capable of holding a liquid inside.

The porous carrier is preferably impregnated with hydrogen peroxide by a dipping method, a spray method, etc., preferably immediately before use.

The preparation of this invention is used either by putting the preparation as it is in water or by placing it in a suitable container and putting it in water. The container is preferably made of a material that prevents passage of the porous carrier but allows liquid water to pass therethrough. Examples include containers made of synthetic resin nets or fabrics, and containers made of metal with a mesh shape. The size of the container will vary depending on the place of use, the object of use, the amount of hydrogen peroxide required, etc.

The preparation of the present invention is effective for preventing, exterminating, or treating skin diseases caused by parasites and pathogenic bacteria that parasitize cultured fish in seawater (yellowtail, yellowtail, sea bream, striped horse mackerel, Japanese yellowtail, amberjack, flounder, etc.). More specifically, the preparation of this invention is stored in a container of an appropriate size,
This can be immersed in a predetermined grove of trees below the sea level within an appropriately sized enclosure of the fish farm. Further, the same method can be applied to freshwater cultured fish.

Furthermore, the formulation of the present invention can be used in sea areas where red tide occurs in seawater to prevent damage to fish.

For example, the preparation of this invention may be sprayed on the outer edge of the flowing area of the sea area where the red tide has occurred, or the preparation of this invention may be placed in a container and placed within 1 to 5 meters around the surrounding net of the aquaculture fish pen where the red tide approaches. Just immerse it in deep water.

The hydrogen peroxide concentration in seawater or freshwater can be changed depending on various conditions such as the purpose of use, temperature, and type of fish. For example, to exterminate parasites that have once infested wastewater cultured fish, 30 to 300 ppm' - preferably 4
Concentrations from 0 to 2QQppa+ are used.

10 to 2 steps to prevent parasite settlement on seawater cultured fish
00ppI111 preferably 20-150pI) III
It is. . The processing time depends on the purpose of use, hydrogen peroxide concentration,
Although it varies depending on the condition of the fish, it is generally sufficient to maintain a predetermined concentration for 3 to 40 minutes, preferably 5 to 30 minutes, and repeat this as many times as necessary. - The concentration used for red tide that has occurred is 10 to 30 ppo+.

In addition, in the treatment method according to the present invention, the porous carrier impregnated with the above-mentioned hydrogen peroxide solution is used in combination with a porous carrier impregnated with other known preparations effective against parasites or pathogens of cultured fish. This also includes cases where

Next, the present invention will be explained in more detail with reference to Examples.
This invention is not limited to this.

(D) Examples Example 1 The hydrogen peroxide-impregnated porous material according to the present invention was tested for release of hydrogen peroxide in seawater and horizontal diffusion.

FRP water tank (1800X 1800x 1800mm
) was charged with 5 m3 of seawater, and in a stationary state, the formulation of the present invention and the comparative samples (hydrogen peroxide solution alone and sodium percarbonate solution alone) were each gently added from one corner (point D) of the tank. The concentration of the formulation in the other three corners of the water tank (A, B, point 0) was measured after 10 minutes, 20 minutes, and 30 minutes.

The results are shown in Table 1, and the formulation of the present invention, in which porous granulated slag granules and porous zeolite granules are impregnated with hydrogen peroxide, can be sufficiently dispersed horizontally in seawater. I understand that.

Example 2 The same 5 m3 of waste water was placed in the water tank used in Example 1, and in a static state, porous inorganic compound granules impregnated with hydrogen peroxide were placed in a bag woven with Tetoron thread, wrapped with a vinyl sheet, and placed in the water tank. Hang it in the center (1 meter deep), remove the vinyl sheet, collect surface seawater from each corner after a certain period of time, and measure the concentration of hydrogen peroxide. Diffusivity in direction was tested.

Table 2 shows the concentration of the drug after each elapsed time at the measurement points (points A, B, C, and D in the four corners of the aquarium).

As a result, it was confirmed that the porous material impregnated with hydrogen peroxide used in the present invention diffused widely and uniformly in the upward direction in seawater.

(Left below) Table 12 Table 11 Example 1 Yellowtail in a certain bay! [We carried out extermination of parasites on site. The size of the farmed Ikesu was 7 m square and 5 m deep, the number of 19 fish being raised was approximately 5,000, and the average fish weight was approximately 6,009.

Granulated slag with particle size 2-4R11 (bulk specific gravity 0.81)
Five pieces were prepared by impregnating 5 and 9 with 6% hydrogen peroxide solution and placing them in a bag woven from Tetoron type. Slightly above the bottom of the aquaculture pond from the center of the pond (approximately 4.5m deep)
5/a was suspended in deep water. Seawater was collected from the sea surface in the center of the farmed Ike and 1 m below the sea surface at intervals of elapsed time, and the hydrogen peroxide concentration was measured.Five yellowtail fish were taken before and 24 hours after being immersed in the treatment agent, and their bodies were examined. The number of spider mites and elamids infesting the table and gills was calculated. The measurement results of hydrogen peroxide concentration are shown in Table 3, and the results of counting parasites are shown in Table 4. As a result, it was confirmed that the parasite extermination effect was remarkable.

83 (Concentration measurement results of hydrogen permarate) Table 4 (Parasitism count 1kJIIIJll&) Implementation FP12 At a yellowtail farm in a certain bay, an experiment was conducted to suppress the attachment of parasites to yellowtail. The size of the farmed squid is 7m square and 5m deep, and the number of 19 fish being raised is approximately 7,000. The average fish weight was approximately 3009.

Granulated slag with particle size of 4 to 6u (bulk specific gravity 0.85) 3.0
12 bags were prepared by impregnating 2.4 kg of 8% hydrogen peroxide solution with 9 parts and placing them in bags knitted with Tetoron thread.

The fish were hung in 12 locations in 4 holes of the fish net for aquaculture, slightly above the bottom of the fish (about 4.5 mm deep). The same number of the above preparations were changed every 10 days, and a four-month test was conducted from July to 10th month.

In addition, as a non-treated area, the size of the cultured Ikes and the rearing 1
A comparison was made with the same number of nine fish.

That is, after the test was completed, 965 yellowtails from the test area and 965 yellowtails from the untreated area were taken, and the number of parasites attached to the body surface and gills and the average fish weight were determined. The results are shown in Table 5.

As a result, The swimming larvae of the parasite are attached to the skin of the fish body. It was confirmed that adhesion can be prevented.

Table 5 (E) Effects of the Invention The preparation of the present invention can sufficiently release hydrogen peroxide into water and disperse it uniformly in the water, making it easy to work with and saving labor and costs.

Claims (1)

[Scope of Claims] An underwater hydrogen peroxide preparation comprising a porous carrier impregnated with 1.3 to 10% hydrogen peroxide solution. 2. The preparation according to claim 1, wherein the porous carrier is in the form of porous particles, granules, pellets, or spheres made of an inorganic substance or an inorganic substance and an organic substance. 3. The preparation according to claim 1, wherein the hydrogen peroxide solution is 5 to 7% hydrogen peroxide solution. 4. The preparation according to claim 1, which is used for the prevention, extermination, or treatment of skin diseases caused by parasitic or pathogenic bacteria in seawater cultured fish. 5. The preparation according to claim 1, which is housed in a container made of a material that prevents passage through a porous carrier but is permeable to liquid water. 6. A method for treating farmed fish, which comprises immersing the preparation of claim 1 in seawater to prevent, exterminate or treat skin diseases caused by parasites or pathogenic bacteria in seawater farmed fish.