JP6799887B2 - Breeding water circulation system for culturing edible frogs - Google Patents

Description

The present invention related to the circulation system of the breeding water for farming edible frog, especially when artificial breeding edible frog, removal of bacteria feeding methods and breeding water and its manufacturing method of the food edible frog about the circulation system of the breeding water for farming edible frogs which aimed at systems amphibian aquaculture and method for generating rearing water pathogens and to eradication of infection facility by measures bacteria and viruses.

The main fish cultivated in Japan are highly carnivorous fish such as tuna, yellowtail, red sea bream, salmon, eel, and anago. The compound feed for fish farming, which is suitable for fish with strong carnivorousness, contains an average of 55% of fish meal containing a large amount of protein as a main nutrient.

This fishmeal is made by boiling the landed fish in a large kettle, separating the fat and water with a squeezer, and drying it. Also called fish meal. Those dried to 10% or less of water are distributed at room temperature.

If there is no problem in the nutritional value and digestibility of each raw material, carnivorous fish farming requires around 50% protein, 10-15% fat and around 10% sugar as feed components. Since the protein requirements of pigs, cattle and chickens are in the range of 24-10% of the feed, that of carnivorous fish is considerably higher.

The protein requirement changes depending on the growth stage and decreases to about 50% to 45% during the growth of fry, juvenile and adult fish. This high protein requirement severely limits the use of feed ingredients.

Carnivorous fish need polyunsaturated fatty acids. Among them, marine fish use highly unsaturated fatty acids docosahexaenoic acid (DHA) and icosapentaenoic acid (EPA) as essential nutrients. Fish oil contains a large amount of DHA and EPA.

Most of the fishmeal, which is the main raw material for compound feed for aquaculture, depends on imports, but fishmeal is used not only for aquaculture but also for livestock feed for pig farming and poultry farming, and the fish farming and livestock industry is worldwide. Demand for fishmeal is increasing worldwide, and prices continue to rise, while it is booming.

Looking at trends in fishmeal import prices in recent years, the average price of fishmeal imports in 2004 was 76 yen / kg, but in 2013 it doubled to 154 yen / kg, the highest ever. It has reached the standard.

For this reason, in the national government, fishermen and the national government will make a certain amount of reserves in advance from 2010, and when the price of compound feed rises above a certain level, a compensation will be provided from the reserves. "Construction project" is being implemented.

As of the end of March 2014, the subscription rate was 64% and the number of subscriptions was 749. The April-June period per ton of compound feed purchased in 2013, when the price of compound feed soared. It covers 3,550 yen, November-610 yen for the July-September period, and 11,560 yen for the October-December period, respectively.

In addition, in this project, we are taking flexible measures according to the situation, such as reviewing the compensation standard so that the compensation will correspond to the burden on the aquaculture company.

Not only is the demand for fishmeal increasing, but because it is made from high-yielding floating fish such as anchovy, which has large resource fluctuations, the production volume fluctuates sharply due to resource fluctuations, making price trends even more unstable. On the other hand, China, which has become a major aquaculture country, has begun to import nearly 2 million tons of fish meal (fish meal) from South America, and the global supply-demand balance of fish meal has changed significantly.

Environmental problems such as anchovy, which is the raw material of fishmeal, are overfished and fishery resources are reduced, resulting in impaired biodiversity, and there are 10 animal proteins that humans can ingest in the process of growing farmed fish using fishmeal. It can be said that there is also a food problem that is reduced to about one-third.

With the ever-increasing world population, the expansion of agricultural production in a limited cultivated area is limited, and fish as a health food is attracting a great deal of attention, and the increase in fish diet is progressing worldwide.

In this way, it is also a fact that the rapid expansion into the aquaculture industry as a valuable protein production that supports tomorrow's food has led to a situation of competition for fish meal and fish oil.

By the way, regarding the supply and demand trend of fishmeal, the supply (production) of fishmeal in the world is basically reduced in the amount of raw fish resources, although it is accompanied by yearly fluctuations such as the influence of the El Nino phenomenon. Reflecting this, the number is decreasing from 6.99 million tons in 2000 to 5.62 million tons in 2007. On the other hand, demand is expanding in the aquaculture industry.

According to the Food and Agriculture Organization of the United Nations (FAO), global demand for seafood averages 150 million tonnes between 2013 and 2015, and is expected to reach nearly 180 million tonnes by 2025. Of these, natural seafood is expected to remain constant at around 90 million tons per year, so expansion is not expected, and it depends on aquaculture to meet future demand for seafood.

In Peru, which boasts the world's largest production of fishmeal, catch adjustments are being made for the purpose of resource conservation and price stability, and no increase in fishmeal production can be expected.

As the raw material for fish feed, dried and crushed fish meal such as anchovy has been used, but there is a concern that the supply of fish meal will be insufficient, and 1.2 million to 1.6 million tons of fish meal substitute feed raw material will be required in 2025. It is said.

In order to realize sustainable aquaculture in line with such environmental problems and food problems, in order to reduce feed costs, as a raw material for mixed feed for fish farming, a raw material that replaces fish meal as a feed compounding design is used. Desired.

Therefore, the present inventor has prepared a mixed feed mainly composed of edible frog powder (bull frog meal), egg cells of edible frog eggs and / or edible frog oil (bull frog oil) as disclosed in Patent Document 1. We propose raw materials, their production methods, and compound feeds produced using the raw materials.

According to Patent Document 1, a raw material for a mixed feed that is superior to melode, mackerel, and single-mouthed sardine, which is a material for fish meal, and a method for producing the mixed feed, and a mixed feed produced using the raw material. Can be provided.

By the way, the bullfrog, which is a typical edible frog used here, is resistant to changes in the environment and has considerable fertility. Therefore, artificial aquaculture can be performed relatively easily. In Japan, the number of bullfrogs, which is only 24, has increased to about 520,000 in the 12 years from 1918 (Taisho 7) to 1930 (Showa 5), which is an amazing fertility.

At that time, securing food for frogs that eat live fish and insects was the most difficult problem in aquaculture. Two night lamps attracted insects and fed them to frogs. When there were few insects, small fish were administered.

Later, when a method was devised to feed on dead fish and silkworm pupae at the Fisheries Experiment Station, many farmers wanted to raise them.

Side business frog associations (Yoakumiai) were established in various places, and the production, purchase, breeding consignment, and sale of frogs were carried out. The profit of concern is 630 yen for 252 pieces of adult frogs (3150 animals), and it is said that there is a profit of more than 352 yen after deducting the purchase cost and feed cost of tadpoles. This was in 1930, and when converted from the production value of rice at that time, the sales price of 36 edible frogs and one bale of rice were almost the same.

In addition, promotion of frog dishes was one of the important tasks of the frog union. Tasting parties are held in various places during this period. At that time, the character of favorite dishes such as soft-shelled turtle dishes was still strong, so in order to establish it as a popular dish, it was started to wholesale frogs at cheap prices to 7 restaurants in Mie prefecture including the former Tado village in Mie prefecture. ..

However, in Japan, where the habit of eating frogs was not lacking in seafood and chicken, the escape of frogs continued due to the fact that the frogs did not grow in spite of the government's expectations and the aquaculture management was incomplete. , There were many traders who withdrew from aquaculture.

From the Taisho era to the beginning of the Showa era, aquaculture was encouraged as a side job of farmers, and canned meat peaches were exported to the continental United States and Hawaii. However, exports were suspended when World War II began.

After the war, bullfrogs were imported from North America for food purposes, and aquaculture using fallow fields was actively carried out. And it will be restarted as an export product.

From 1949 to 1951, it attracted attention as it became the third largest export volume after frozen tuna. At that time, it became a valuable export product that earned nearly 300 million yen in foreign capital annually.

However, in 1969, the problem was that BHC, a pesticide, remained in the meat peaches of bullfrogs in the United States, which became a social problem and exports were abolished.

In the cultivation of edible frogs, many bullfrogs in the frog farm in Kamakura escaped due to the heavy rain in July 1938. A river called the Sunaoshi River runs right next to this frog farm, and it is said that it scattered all over Japan via that river.

In addition, the frog farm is not only here, and it is not only the bullfrog that escaped during the heavy rain, but around 1930, the American crayfish was brought in as food, and the American crayfish was also Showa. He escaped due to the heavy rain in 13 (1938), and the management system was inadequate.

Due to the selection of such aquaculture management system, bullfrogs are currently designated as specific alien organisms by the Alien Organism Law in Japan as they affect the ecosystem of other frogs in the natural world. ..

The aquaculture, etc. (breeding, storage, transportation, etc.) is prohibited except with the permission of the Minister of the Environment.

Japanese Patent Application No. 2017-225197

However, at the site of such edible frog farming, there are the following problems.

1. 1. Safety Issues When culturing edible frogs, especially in the artificial cultivation of Xenopus laevis and American bullfrog, it is necessary to pay attention to chytridiomycosis and Lanavirus disease.
Chytridiomycosis is asymptomatic with Xenopus laevis as the host. A frog disease of African origin, it came to Japan from an imported frog. It is an emerging infectious disease of amphibians and belongs to the phylum Chytrids. Chytrids are fungi that live in soil and freshwater and parasitize the skin of amphibians, and when infected, they die. It is the cause of amphibian decline on a global scale. It spreads with strong infectivity through water. In Japan, where there is a lot of rain and rivers, the infection cannot be stopped. On the other hand, even if infected, it can be treated by a specialized agency. It does not infect humans, fish, mammals, birds or reptiles. The American bullfrog is resistant to chytridiomycosis.
In addition, Lanavirosis mainly infects fish, amphibians and reptiles, but not humans. The main symptom of Lanavirus disease is infection with tadpoles whose limbs have begun to appear, and bleeding causes the belly to become red. It is said that the cause of death of frogs exceeded that of chytridiomycosis.
As an infection route, zoospores of chytridiomycosis and ranavivirus infect other amphibians and fish by the outflow of breeding water from the breeding tank.
Therefore, in order to prevent chytridiomycosis and Lanavirus disease from occurring, it is necessary to sterilize the breeding water at the breeding stage.

2. 2. Supply and price issues Generally, hatching takes place in a week. However, aquaculture in the natural world requires production at aquaculture facilities because many natural enemies inhabit it and the survival rate is low and mass production is difficult before it grows.
In Japan, it lays 6,000 to 40,000 eggs wrapped in agar from May to September. It overwinters in the state of a larva (tadpole) and metamorphoses into a larva in the summer of the following year. The juveniles move to other water areas, connecting to the water area. Adults in winter hibernate halfway into the mud on the bottom of the water. There is a problem that productivity does not increase because the growth period becomes long if there is the hibernation process. It is necessary to improve the survival rate from hatching to adulthood and to eliminate the hibernation period and shorten the growth process period.
Further, when edible frogs are traded as foodstuffs or experimental materials after aquaculture, there is a problem that the price per frog is as high as 2,000 to 3,000 yen. Therefore, it is necessary to reduce the cost of the feed price depending on the feed breeding and feeding method for breeding the edible frog.

Therefore, an object of the present invention is to provide a breeding water circulation system for cultivating edible frogs, which is highly safe, can increase the supply amount, and can reduce costs when artificially cultivating edible frogs. The purpose of the present invention is to provide a breeding water circulation system for cultivating food, a method for feeding food for edible frogs, and a method for producing food for edible frogs.

In order to achieve the above object, the present invention comprises an electrolytic tank that generates slightly acidic electrolytic water, a slightly acidic electrolytic water tank that stores the slightly acidic electrolytic water generated in the electrolytic tank, and the slightly acidic electrolytic water storage tank. A diluted electrolytic water water tank that stores nano-hypochlorite water obtained by adding nano-level bubbles and diluted water to the slightly acidic electrolyzed water sent from the tank, and nano-hypochlorite generated in the diluted electrolytic water water tank. An edible frog breeding tank that uses acid water as breeding water for edible frogs, a septic tank that filters and purifies the breeding water used in the edible frog breeding tank, and a purification tank that sterilizes and stores the filtered and purified breeding water. Provided is a breeding water circulation system for cultivating edible frogs, which comprises a completed water storage tank, wherein the sterilized breeding water is sent to the electrolytic tank and circulated in the facility.

The electrolytic cell is a one-chamber type electrolytic cell in which the anode and the cathode are not separated by a diaphragm.

An underground fresh water of 13 ° C. to 20 ° C. and 2% to 6% hydrochloric acid water are injected into the electrolytic cell, and the underground fresh water is heated to 30 ° C. to 70 ° C.

The diluted electrolyzed water storage tank is characterized in that the water temperature of the slightly acidic electrolyzed water is lowered to 13 ° C. to 28 ° C. with the diluted water.

The diluted electrolyzed water storage tank is characterized by including a nanobubble generator for generating nanobubbles.

The nanohypochlorite water of the present invention is a breeding water (13 ° C to 28 ° C) that has a high dissolved oxygen concentration and eradicates bacteria, increases the hatching rate and the survival rate at the time of larva, and is used for edible frogs and seafood. It can shorten the growth process and at the same time eliminate the hibernation period of edible frogs.
Further, the nanohypochlorous acid water of the present invention is to be drained to the outside as safe breeding water by electrolyzing at 30 ° C. to 70 ° C. in a one-chamber electrolytic cell to further enhance the sterilizing action. Can be done.

Underground freshwater nano-ozone bubble water is effective in shortening the hatching rate, the survival rate of juveniles and larvae (tadpoles), and the growth period. In addition, nanohypochlorite water is effective in shortening the hatching rate, the survival rate of juveniles and larvae (tadpoles), and the growth period. Therefore, nano-ozone bubble water and nano-hypochlorous acid water can accelerate the growth period of breeding of fish and edible frogs and can be bred with a high survival rate due to the sterilization effect. By completely culturing the prey of edible frogs bred in these breeding waters, there is an effect that the culturing cost of edible frogs as substitute fish meal can be significantly reduced.

It is an overall block diagram of the edible frog and the food culture equipment of the edible frog which concerns on embodiment of this invention. It is a schematic block diagram of a septic tank. It is a schematic block diagram of a purified water tank. It is a schematic block diagram of a 1-chamber type electrolytic cell and a slightly acidic electrolyzed water storage tank. It is a schematic block diagram of the diluted electrolyzed water water tank. It is a schematic block diagram of the light-shielding type aquaculture farm which concerns on other embodiment of this invention.

Hereinafter, referring to the drawings, a breeding water circulation system for cultivating edible frogs according to an embodiment of the present invention, a breeding water circulation system for cultivating edible frog food, and feeding of edible frog food. The method and the method for producing food for edible frogs will be described in detail.

It is necessary to maintain a temperature of 13 ° C. to 28 ° C. as a condition that the frog does not hibernate. In particular, frogs born in the tropics do not hibernate. If you try to reverse it, you may die. Even in winter, if you keep the water temperature between 13 ° C and 28 ° C and control the amount of food intake, you will not hibernate. Humidity control is important for frogs, and when they are in low humidity, they cannot get oxygen from their skin. When the temperature drops below 20 ° C, it is said that the amount of activity of frogs decreases and the functions of internal organs weaken, and it is said that people who do not hibernate tend to live longer. The water depth that the frog's body can enter is required, and since the frog does not drink water, it frequently requires humidity control in a mist-like water bath. The aquaculture equipment for that purpose will be described below.

FIG. 1 is an overall configuration diagram of an edible frog and a edible frog bait aquaculture facility according to an embodiment of the present invention.
In the figure, the aquarium 1 and the aquarium 2 are aquariums for hatching and breeding food for edible frogs, and the aquariums 3 and 4 are aquariums for cultivating larvae of edible frogs (tadpoles) and after metamorphosis of edible frogs. is there.

The discharge pipe 5 is a pipe for discharging the breeding water discharged from each of the water tanks 1 to 2, and the adjustment bubble 6 is an adjustment valve for adjusting the direction and pressure of the water flow passing through the discharge pipe 5.
The septic tank 7 is a water tank that purifies the used breeding water that has been transferred through the discharge pipe 5, and the purified water tank 8 temporarily supplies the clean and safe supernatant breeding water filtered by the septic tank 7. It is a water tank that stores water.

The one-chamber electrolytic cell 9 is a one-chamber electrolytic cell in which the anode and the cathode are not separated by a diaphragm, and produces slightly acidic electrolyzed water (hypochlorous acid water = HCLO). The slightly acidic electrolyzed water storage tank 10 is a water tank for storing the slightly acidic electrolyzed water generated in the one-chamber type electrolytic cell 9.

The diluted electrolyzed water storage tank 12 is a water tank in which diluted water 11 is added to the slightly acidic electrolyzed water sent from the slightly acidic electrolyzed water storage tank 10 to store the water.

The underground freshwater water tank 25 is a water tank that stores purified breeding water and underground freshwater 14.

The ozone generator 26 is a device that generates ozone from purified breeding water and water stored in the underground freshwater water tank 25.

Hereinafter, the configuration and the like of each facility will be described in detail with reference to FIGS. 2 to 4.
FIG. 2 is a schematic configuration diagram of the septic tank 7.
As shown in the figure, the septic tank 7 is a tank for turning used breeding water into clean and safe discharged water.

The septic tank 7 is composed of an anaerobic filter floor tank 29 and a contact blast tank 18.
The anaerobic filter floor tank 29 is composed of an anaerobic filter floor tank 1st chamber 16 and an anaerobic filter floor tank 2nd chamber 17, and in the anaerobic filter floor tank 1st chamber 16, the filter medium 28 removes suspended matter and requires oxygen. Anaerobic microorganisms that do not decompose and purify dirt (organic matter) in water. Sewage is transferred from the first chamber 16 to the anaerobic filter floor tank second chamber 17, and is further purified by the same procedure.

The contact aeration tank 18 is aerated by bringing the liquid and air into contact with each other, and is purified by circulating sewage by the aerobic microorganisms of the contact material 30. That is, the liquid and air are brought into contact with each other by the blower 31, and the biofilm (aerobic microorganism) adhering to the contact material 30 is used to circulate and contact the contact material 30 while aerating the sewage to release organic substances in the sewage. Further purify.

The settling tank 19 precipitates solids contained in the purified treated water, and discharges clean supernatant breeding water from the injection pipe 15 to the purified water tank 8.

FIG. 3 is a schematic configuration diagram of the purified water tank 8.
As shown in the figure, the breeding water discharged from the injection pipe 15 of the septic tank 7 is poured into the purified water tank 8, and the ozone generated by the ozone generator 26 makes the breeding water clean and safe, and the whole is made into clean and safe water. 3% to 5% is discharged from the drain pipe 32. The rest is filtered by the impurity removing filter 20 and sent to the water tank (one-chamber type electrolytic cell 9 or underground freshwater water storage tank 25) in the next process.

FIG. 4 is a schematic configuration diagram of a one-chamber type electrolytic cell 9 and a slightly acidic electrolyzed water storage tank 10.
As shown in the figure, a cathode 21, an anode 22, and a diving heater 23 are provided in the one-chamber electrolytic cell 9. The anode 22 and the cathode 21 are a one-chamber type electrolytic cell not separated by a diaphragm. Purified water from the purified water tank 8 and underground fresh water 14 at 13 ° C to 20 ° C are injected into the one-chamber electrolytic cell 9, and 2% to 6% hydrochloric acid water is poured into the purified water, and the one-chamber electrolytic cell 9 is charged. The underground fresh water 14 inside is heated to 30 ° C. to 70 ° C. with a submersible heater 23 to enhance the action of removing pathogens, bacteria and viruses of the slightly acidic electrolyzed water in the one-chamber electrolytic cell 9. This makes it possible to generate slightly acidic electrolyzed water (hypochlorous acid water) having a pH of 5.0 to 6.5 and an effective chlorine concentration of 10 to 80 ppm, which has a higher sterilizing power.

A diving heater 23 and an impurity removing filter 23 are provided in the slightly acidic electrolyzed water storage tank 10. The slightly acidic electrolyzed water generated in the one-chamber electrolytic cell 9 is poured from the injection pipe 15 into the slightly acidic electrolyzed water storage tank 10, and is heated and kept warm by the diving heater 23 while being connected to the one-chamber electrolytic cell 9. It is circulated in the water and the electrolysis is repeated to improve the electrolysis quality. Further, the nanobubble generator 13 generates ultrafine nano-level bubbles of 50 microns or less and dissolves them in the slightly acidic electrolyzed water to increase the dissolved oxygen concentration of the electrolyzed water. Then, the impurity removing filter 23 removes impurities contained in the slightly acidic electrolyzed water, and the water is sent to the diluted electrolyzed water storage tank 12. The slightly acidic electrolyzed water produced is a reference value water that can also be used for drinking water.

FIG. 5 is a schematic configuration diagram of the diluted electrolyzed water storage tank 12.
The slightly acidic electrolyzed water sent from the slightly acidic electrolyzed water storage tank 10 to the diluted electrolyzed water storage tank 12 through the injection pipe 15 has a water temperature of 30 ° C. to 70 ° C. in the submersible heater 23 of the slightly acidic electrolyzed water storage tank 10. Therefore, by adding diluted water (ground fresh water) 11, the water temperature is lowered to 13 ° C. to 28 ° C. The diluted water (underground fresh water) 11 is clean and safe water due to the ozone generated by the ozone generator 26.

In addition, the nano bubble generator 13 generates nano-level bubbles to increase the dissolved oxygen concentration of the electrolyzed water, and also generates nano hypochlorous acid water (nano HCLO) that is safe and has excellent sterilizing action, and is used as breeding water. .. The generated nanohypochlorite water is sent to the breeding aquariums 3 and 4 through the water pipe 34.

The nanohypochlorous acid water is sterile and has a high dissolved oxygen concentration, which increases the hatching rate of up to 40,000 eggs laid per edible frog. Moreover, since the water temperature is maintained at 13 ° C. to 28 ° C., no hibernation period is required from larvae (tadpoles) to adults. Since nanohypochlorite water is a nanobubble, it has a high dissolved oxygen concentration and can shorten the survival rate and growth period from larvae (tadpoles) to adults.

For this reason, it is possible to enable an unprecedented production increase system. In addition, hypochlorous acid water itself exerts a strong sterilizing effect not only on bacteria and viruses but also on fungi, that is, molds. This makes it possible to eradicate not only edible frogs but also pathogens that cause infection of amphibians or their zoospores.

Then, the breeding water used in the water tank 3 and the water tank 4 closes the bubble 6 of the discharge pipe 5, passes through the discharge pipe 5 (downward in FIG. 1), and is transferred to the septic tank 7. The breeding water purified in the septic tank 7 is discharged from the drain pipe 32 of the purified water tank 8.

Returning to FIG. 1, explaining the underground freshwater water tank 25, the water purified by the underground freshwater 14 and the purified water tank 8 is sent to the underground freshwater water tank 25, and the sent water is supplied by the submersible heater 23. The temperature is maintained at 13 ° C. to 20 ° C., and the nanobubble generator 13 and the ozone generator 26 generate nanoozone bubble water.

Nano-ozone bubble water is produced as breeding water having a high oxygen concentration and a bactericidal action, and serves as breeding water in the aquarium 1 and the aquarium 2.

The breeding water used in the water tank 1 and the water tank 2 closes the bubble 6 of the discharge pipe 5, passes through the discharge pipe 5 (upward in FIG. 1), and is transferred to the septic tank 7. The breeding water purified in the septic tank 7 is discharged from the drain pipe 32 of the purified water tank 8.

Based on the above configuration, the breeding water for cultivating the "edible frog" and the breeding water for cultivating the "food for the edible frog" will be described.

<How to generate breeding water for cultivating edible frogs>
The breeding water for cultivating edible frogs is
1. 1. Underground fresh water 14 and hydrochloric acid water are injected into the one-chamber electrolytic cell 9 and heated by a diving heater 23 to make slightly acidic electrolyzed water.
2. 2. This slightly acidic electrolyzed water is stored in the slightly acidic electrolyzed water storage tank 10 and circulated with the one-chamber type electrolytic cell 9.
3. 3. The slightly acidic electrolyzed water generated in the one-chamber electrolytic cell 9 and stored in the slightly acidic electrolyzed water storage tank 10 is sent to the diluted electrolyzed water storage tank 12 through the impurity removing filter 20.
4. Breeding water in which the water temperature is lowered by the diluted water 11 in the diluted electrolyzed water storage tank 12 and the nano bubble generator 13 is provided to generate nanohypochlorous acid water (HCLO), which has a high dissolved oxygen concentration and eradicates bacteria. To generate.
5. The generated nanohypochlorite water is sent from the water supply tube 34 to the breeding tanks 3 and 4 of the edible frog.
6. The used breeding water is sent to the septic tank 7 through the drainage pipe 5 and filtered.
7. The filtered clean and safe supernatant is sent to the purified water tank 8, the bacteria in the water are sterilized by the ozone generator 26, and then 3% to 5% of the whole is drained from the drain pipe 32.
8. The rest is circulated by sending water to the one-chamber electrolytic cell 9.

<Method of producing breeding water for cultivating food for edible frogs>
The breeding water for cultivating food for edible frogs is
1. 1. An underground freshwater water storage tank 25 is installed, and underground freshwater (13 ° C. to 20 ° C.) is injected therein.
2. 2. When the water temperature is 10 ° C. or lower, the diving heater 23 heats the water.
3. 3. A nano bubble generator 13 and an ozone bubble generator 26 are installed in the underground freshwater water storage tank 25 to generate nano-ozone bubble water having a high dissolved oxygen concentration and a bactericidal action.
4. The generated nano-ozone bubble water is sent to the breeding tanks 1 and 2 for feeding through the underground freshwater water supply tube 27.
5. The used breeding water is sent to the septic tank 7 through the drainage pipe 5 and filtered, and the clean supernatant water is sent to the purified water storage tank 8 to sterilize the bacteria with the ozone generator 26.
6. 3% to 5% of the total is discharged, and the rest is sent to the underground freshwater water tank 25 through the impurity removing filter 20.
7. After that, steps 3 to 6 are circulated.

In the above, the method of generating the breeding water for culturing the edible frog and the breeding water for cultivating the food for the edible frog have been described separately, but basically either breeding water can be cultivated.
However, the breeding water for edible frogs is preferably nanohypochlorite water, which is necessary for sterilization of bacteria and anti-virus measures.

Further, the nanohypochlorous acid water and the nanozone bubble water have the same effect as the oxygen nanobubble water. In particular, it has been confirmed that the length of fish raised in the environment of oxygen nanobubble water increases, and the period until the farmed fish grows to the shipping size is shortened. The amount of oxygen contained in oxygen nanobubble water is about five times that in the normal case, and as a result, the fish are activated and eat a lot of food, and the growth is promoted. Nanohypochlorous acid water and nanoozone bubble water not only promote growth, but are also effective in removing bacteria and combating viruses, further increasing the survival rate of complete aquaculture. Also, regarding drainage, clean and safe breeding water can be discharged.

Next, a feeding method and a manufacturing method of the food necessary for breeding the edible frog will be described.
In order to use edible frogs as an alternative feed material for aquaculture fish, the food is completely cultivated to eliminate the purchase of fry, and the food for edible frogs is bred in the same place. The food for edible frogs and edible frogs is complete aquaculture from spawning to larvae (tadpoles) to juveniles to sub-adults to adults. The food used is edible frog tadpoles and crucian carps. As a frog feeding method, a cannibalistic feeding method is adopted in which a large frog eats a small frog by mixing large and small frogs.

Rana japonica lays 800 to 3,000 eggs, and bullfrog lays up to 40,000. Amphibians with such a large number of eggs are laid naturally or artificially and hatched. Then, the live food in a state where the larvae (tadpoles) about 1 to 2 months after hatching are used as food for the edible frogs at the larvae (tadpoles) of 3 months or more and the juveniles and sub-adults (adults). Feed with (cannibalism) or thawed frozen live food (cannibalism). Here, "live food" refers to food in a living state, and "live food" refers to food in a state in which it is not alive but still in its original form.

In addition, crucian carps inhabit lakes, swamps, and ponds in the plains, and the trickles and river basins connected to them from the middle reaches to brackish waters. It feeds on a wide range of benthic and floating flora and fauna. In winter, it lurks deep in lakes and rivers.

From March to July, they move to shallow places with a water temperature of 17 to 20 ° C and lay eggs on aquatic plants and suspended matter in the early morning. The number of eggs laid by one fish varies greatly depending on the size of the body, but a normal-sized one lays 40,000 to 90,000 eggs. Spawning shall be natural spawning or artificial spawning. The diameter of spawning and landing is about 1 to 1.7 mm, and it is greenish. It hatches in 5 to 10 days at a water temperature of 15 to 20 ° C.

The hatched crucian carp larvae have a total length of about 3.5 to 5.5 mm. The larvae hang on aquatic plants and suspended matter for a while and stay near the surface of the water. Generally, both males and females reach a total length of 8 to 20 cm in 2 years and mature. Maturation under captive conditions may also be seen in 1 year old fish with a total length of 4-5 cm.

It is hatched and bred to juveniles, and the edible frogs are fed live or frozen live food to juveniles and sub-adults and adults at the time of larvae (tadpoles) and after metamorphosis.

For example, freshwater fish and edible frogs may be hatched at the same time or at different spawning times, and freshwater fish 1 to 3 months after hatching may be fed as food. In addition, freshwater fish or tadpoles are fed to adult edible frogs.

As a method for producing the feed, for example, as a feed for edible frog larvae (tadpoles) to juveniles to sub-adults to adults, bullfrog larvae (tadpoles) 5 cm to 15 cm in size are mixed with larvae or adult fish. Boiled in steam, squeezed with a screw press, dried with a disc dryer, powdered with a crusher and shaken to serve as an alternative fishmeal raw material, blended with approved feed additives, and substituted. Manufacture compound feed that becomes fish meal.

In addition, this bullfrog larva (tadpole) 5 cm to 15 cm in size is boiled in steam, squeezed with a screw press, dried with a disc dryer, powdered with a crusher and shaken to use as an alternative fish meal raw material. , Produce a compound feed that can be used as an alternative fish meal by blending approved feed additives.

In addition, this bullfrog larva (tadpole) 5 cm to 15 cm in size and an adult edible frog are boiled in steam, squeezed with a screw press, dried with a disc dryer, and then powdered with a crusher and shaken. , As an alternative fish meal raw material, compound feed additives approved to produce a compound feed that can be used as an alternative fish meal.

As a result, the problem of a global shortage of up to 1.6 million tons of fishmeal in 2025 can be solved by edible frogs. It can also be used as a substitute for canned fish, which depends on fish raw materials.

FIG. 6 is a schematic configuration diagram of a light-shielding aquaculture plant according to another embodiment of the present invention.
As shown in the figure, the inside of the farm is shielded from light, a dry mist (about 5μ) injection device 35 is installed on the ceiling of the farm, sprayed with nano-hypochlorous acid water (HCLO), and humidified without getting wet. At the same time, the bacteria, fungi and SARS virus in the air may be inactivated.

1 Water tank 2 Water tank 3 Water tank 4 Water tank 5 Drain pipe 6 Adjustment bubble 7 Septic tank 8 Purified water tank 9 Single-chamber type electrolytic tank 10 Slightly acidic electrolyzed water storage tank 11 Diluted water (underground fresh water)
12 Diluted electrolyzed water storage tank 13 Nano bubble generator 14 Underground fresh water 15 Injection pipe 16 Anaerobic filter bed tank 1st room 17 Anaerobic filter bed tank 2nd room 18 Contact aeration tank 19 Settlement tank 20 Impure removal filter 21-Pole 22 + pole 23 Submersible heater 24 Diluted water water pipe 25 Underground fresh water water storage tank 26 Ozone generator 27 Fresh water water pipe 28 Filter material 29 Anaerobic filter bed tank 30 Contact material 31 Blower 32 Drain pipe 33 Slightly acidic electrolyzed water 34 Each water tank feed pipe 35 Dry mist Injection device 36 Dry mist 5μ

Claims (5)

An electrolytic cell that produces slightly acidic electrolyzed water and
A slightly acidic electrolyzed water tank that stores the slightly acidic electrolyzed water generated in the electrolytic cell,
A diluted electrolyzed water tank that stores nanohypochlorous acid water obtained by adding nanobubbles and diluted water to the slightly acidic electrolyzed water sent from the slightly acidic electrolyzed water tank.
An edible frog breeding tank that uses nanohypochlorite water generated in the diluted electrolyzed water storage tank as breeding water for edible frogs.
A septic tank that filters and purifies the breeding water used in the edible frog breeding tank,
A purified water tank that sterilizes and stores the filtered and purified breeding water,
With
A breeding water circulation system for cultivating edible frogs, which comprises sending the sterilized breeding water to the electrolytic cell and circulating it in the facility. The breeding water circulation system for cultivating an edible frog according to claim 1, wherein the electrolytic cell is a one-chamber type electrolytic cell in which the anode and the cathode are not separated by a diaphragm. Claim 1 or 2 is characterized in that underground fresh water at 13 ° C. to 20 ° C. and 2% to 6% hydrochloric acid water are injected into the electrolytic cell, and the underground fresh water is heated to 30 ° C. to 70 ° C. A breeding water circulation system for cultivating edible frogs as described in. The diluted electrolyzed water water tank is for cultivating the edible frog according to any one of claims 1 to 3, wherein the water temperature of the slightly acidic electrolyzed water is lowered to 13 ° C. to 28 ° C. with the diluted water. Breeding water circulation system. The breeding water circulation system for cultivating edible frogs according to any one of claims 1 to 4, wherein the diluted electrolyzed water storage tank includes a nanobubble generator for generating nanobubbles.