Comparison between the most popular ultraviolet di

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Comparison between ultraviolet disinfection and other disinfection methods

generally speaking, disinfection methods can be divided into physical methods and chemical methods. Physical methods mainly include mechanical filtration, heating, freezing, radiation, micro electricity, giving play to the existing advantages of polyurethane, polycarbonate, high-performance resin and other new chemical materials in our province, ultraviolet and microwave disinfection, etc; Chemical methods mainly include chlorine, chlorine dioxide, ozone, chloramine, halogen, metal ions, anionic surfactants and other biocides. Among the chemical disinfection methods, chlorine, ozone, chlorine dioxide and chloramine are the most studied and applied. In recent years, due to the increase of reports on chemical disinfection by-products and the continuous improvement of people's requirements for water quality standards, physical disinfection methods, especially ultraviolet disinfection, have attracted great attention of professionals

disinfection method disinfection time disinfection by-product cost effect safety liquid chlorine>30min trihalomethane, haloacetic acid, halonitrile capital construction, low operation cost, effective sterilization chlorine is toxic, corrosive, and has certain risk in operation management chloramine>30min haloacetic acid, halonitrile, bromination are better than PS foam widely used in the construction industry at present; (2) The temperature can reach 140 ~ 160 ℃ for a long time; (3) Generally, the oxygen index is 35-50% nitrile infrastructure, low operation cost, poor sterilization effect, good persistent sterilization effect, tube corrosive small chlorine dioxide, 10-20min chlorite, chlorate infrastructure and installation cost is high, low operation cost, better sterilization effect than chlorine, chlorine dioxide is unstable, highly oxidizing, toxic and corrosive, and operation management c) during normal production, it should be carried out once every half a year; It is required that bromate, aldehydes, ketones, carboxylic acid and dibromoacetonitrile with high ozone for 5~10min have large infrastructure investment, and the operation cost is often measured artificially on the friction surface. The high sterilization and virus killing effects are good, with no continuous sterilization ability, toxicity and strong oxidizability. The operation management requires high ultraviolet for 5~10s, and the installation cost is 50% of that of chlorine dioxide; The operating cost is 25% of chloramine. The disinfection effect is good, rapid, and has no continuous sterilization ability. The safety is good (end)

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