Ozone (O3) is an oxygen allotrope, it is a special smell of light blue gas, so uv ozone play very important role in water treatment. Molecular structure was triangular, bond angle of 116 °, the density is 1.5 times the oxygen, the solubility in water is 10 times the oxygen. Ozone is a strong oxidizing agent, its oxidation and reduction potential in water is 2.07V, second only to fluorine (2.5V), its oxidation capacity is higher than chlorine (1.36V) and chlorine dioxide (1.5V), can break down the decomposition of bacteria Of the cell wall, and quickly spread into the cells, oxidative decomposition of bacteria within the oxidized glucose necessary glucose oxidase, etc., can also be directly with bacteria, viruses, destruction of cells, ribonucleic acid (RNA), decomposition of deoxyribonucleic acid DNA), RNA, proteins, lipids and polysaccharides and other macromolecular polymers, so that the metabolism of bacteria and reproduction process was destroyed, that's why uv ozone acts well in water treatment.
Bacteria are killed by ozone caused by the cell membrane breakage, this process is called cell dissipation, is due to the cytoplasm in the water is caused by crushing, in the dissipation of the cells can not be regenerated. It should be noted that, unlike hypochlorous acid disinfectants, the bactericidal ability of ozone is not affected by the change of pH and the effect of ammonia. The bactericidal ability is 600-3000 times higher than that of chlorine. Its sterilization and disinfection is almost instantaneous, Ozone concentration in the water 0.3-2mg / L, 0.5-1min can be lethal bacteria.
① Virus has proved that ozone has a very strong killing of the virus, such as Poloi virus in the ozone concentration of 0.05-0.45mg / L, 2min will lose its activity.
② Cysts in the ozone concentration of 0.3mg / L under the action of 2.4min was completely removed.
③ Spores due to the protection of insects, it is more than the growth resistance of the ozone resistance of 10-15 times.
④ Fungal Candida albicans and penicillium can be killed.
⑤ Parasitic schistosomiasis (schistosoma mansoni) was killed after 3 minutes.
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