The feasibility of ozone disinfection of water in aquaculture?
The feasibility of ozone disinfection of water in aquaculture?
Principle: The principle of ozone disinfection can be considered as an oxidation reaction
( 1 ) Mechanism of ozone inactivation of bacteria:
The inactivation of ozone by bacteria is always very rapid. Different from other fungicides: ozone can react with bacterial cell wall lipid double bonds , penetrate into the inside of bacteria, act on proteins and lipopolysaccharides, and change the permeability of cells, leading to bacterial death. Ozone also acts on nuclear material in cells, such as purines and pyrimidines in nucleic acids that destroy DNA .
( 2 ) Mechanism of inactivation of ozone by virus:
The effect of ozone on the virus is first of all the four polypeptide chains of the coat protein of the virus, and the RNA is damaged, especially the protein that forms it. After the phage was oxidized by ozone, it was observed by electron microscopy that the epidermis was broken into many fragments, and many ribonucleic acids were released therefrom, which interfered with the adsorption to the deposit. The thoroughness of ozone sterilization is beyond doubt.
characteristic: Ozone, also known as active oxygen, is an isomer of oxygen and is readily soluble in water. The reduction reaction occurs immediately in the water, and the intermediate substance monoatomic oxygen and hydroxyl monoatomic oxygen are highly oxidizing, and the hydroxyl group is also a strong oxidant and a catalyst. Therefore, ozone has a strong disinfecting effect and can decompose monoatomic oxygen and hydroxyl groups of organic substances which are difficult to destroy by general oxidants. The mechanism of disinfection is that ozone can decompose the cell wall of bacteria, diffuse into human cells, and oxidize and destroy enzymes in the cell to kill germs. It also oxidizes and decomposes bacteria, oxidizes and penetrates its cell walls, destroys its organelles and ribonucleic acids, and decomposes macromolecular polymers such as proteins, lipids and polysaccharides, destroying the metabolism and reproduction of bacteria and viruses. It also acts on lipoproteins and lipopolysaccharides, altering the permeability of cells, leading to cell lysis. The ability of ozone to disinfect and decompose organic matter and inorganic substances in water is several hundred times higher than that of commonly used chlorine. Moreover, due to the instability of ozone, it is easy to generate oxygen and water after the reaction, and will not cause secondary pollution.
Ozone generator ozone is a strong oxidant. Its strong oxidizing and disinfecting properties are not only widely used in pollution and industrial oxidation, but also prevent diseases in aquaculture systems in aquaculture. And the fields of red tide detoxification, water quality improvement, water disinfection, etc. have also been well applied. The sterilization device of the ozone disinfection device can disinfect the biological eggs, sterilize the culture water, disinfect the facilities, and prevent the invasion of pathogens. Ozone has strong sterilization and water purification functions, and it is non-toxic and harmless. It is the most ideal bactericidal purifying agent in aquaculture and seedling production. It is used to control biological diseases such as sea urchins, river crabs and turtles in fish, shrimp and ozone generators. Improving the ecological environment of aquaculture is of great significance.
   In the aquaculture, the ozone disinfection equipment is used to raise seedlings. The price of the complete ozone generator is not high, and the one-time investment is not large. It can save various disinfectants, antibiotics, reduce the amount of water exchange, save fuel coal, and apply ozone seedlings. The survival rate can be more than doubled at least and a set of ozone generators can be used for several years, which can save a lot of farming costs and cultivate green foods, which is economical in all aspects. At present, most countries such as Japan, Europe and the United States have widely adopted ozone for aquaculture, and it is forbidden to use chemical disinfectants such as chlorides for breeding, which causes products with excessive chlorination to enter the market, and has been reported in major newspapers and periodicals.
　 Specific process requirements for the application of ozone generators in aquaculture:
　　 1. Treatment mode of ozone sterilization and breeding water in marine aquaculture: ( Ozone dosage: 1 to 3 grams per cubic water ) , firstly treated with 0.1 to 0.5 mg/L for 5 to 10 minutes, then activated carbon tank The ozone concentration of 0.003 mg/L or less can be used as the breeding water.
　　 2. Treatment mode of ozone sterilization and breeding water in freshwater aquaculture: ( Ozone dosage: 1 to 2 grams per cubic meter ) , firstly treat the ozone generator for 5 to 10 minutes at a concentration of 0.1 to 0.3 mg/L . It can be used as breeding water by aeration to an ozone concentration of 0.003 mg/L or less.
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