1, chlorine dioxide on bacteria, viruses and fungal spores are very strong killing ability, due to ClO2 is an unstable compound, does not contain H0Cl and H0Cl- form of effective chlorine, however, its concentration is often expressed in terms of effective chlorine. clO2 chlorine atom is positive 4 valence, reduction to chloride will be able to get 5 electrons, so its oxidizing power is equivalent to the chlorine 5 times, the effective chlorine content of 263%. Therefore, chlorine dioxide is extremely effective drinking water disinfectant. Chlorine dioxide on the killing principle of microorganisms is: chlorine dioxide on the cell wall has a good adsorption and permeability properties, can effectively oxidize the cell containing hydrophobic enzymes; can be reacted with cysteine, tryptophan and free fatty acids, rapid control of biological protein synthesis, so that the membrane permeability increases; and can change the virus coat protein, resulting in viral inactivation.
2, the bactericidal effect of chlorine is due to hypochlorous acid is small, charge-neutral, easy to pass through the cell wall; at the same time, it is a strong oxidizing agent, can damage the cell membrane, so that proteins, RNA and DNA and other substances released, and affects a variety of enzyme systems (mainly phosphoglucose dehydrogenase sulfhydryl group is oxidized and destroyed), so as to make the bacterial death. The effect of chlorine on viruses lies in the lethal damage to nucleic acids. It has been suggested that viruses are more resistant to chlorine than bacteria, possibly because they lack a range of metabolic enzymes; chlorine is more likely to break the -SH bond and less likely to denature proteins.
Two, related equipment
1, chlorine dioxide is used to prepare chlorine dioxide system (divided into concentrated and dilute solution)
2, chlorine is used to chlorinate the chlorine machine system to chlorine disinfection, including chlorine bottles, weighing, filters, pressure-reducing valves, automatic switching device, vacuum regulator, chlorine vaporizer, chlorine machine, water jets and so on.