The Research Of Disinfection Mechanics And Its Sterilization Disinfection Application Of Chlorine Dioxide On Urban Sewage

Research of sterilization and disinfection about sewage is an important work to solving the water quality safety. Chlorine dioxide is recognized by the international community the best ideal chlorine disinfectants. Domestic research on chlorine dioxide disinfection disinfection is rather less. Therefore, its application on the field of disinfection sterilization is practical value and instructive purpose when chlorine dioxide disinfection principle of urban sewage sterilization and disinfection is researched in-depth.Three areas were done in this paper:â‘ Theoretical research on chlorine dioxide disinfection was fulfilled. Its strong oxidizing made a better strong absorption and penetration capability, and can effectively make sulfur-based enzyme oxidize. It can also rapidly control synthesis of microbial protein so as to destruct microorganisms, and the sterilization disinfection purpose was achieved.â‘¡the primary and secondary order on the urban sewage sterilization disinfection influence by ClO₂, the best conditions on inactivated bacteria by chlorine dioxide, as well as the water by-product after disinfection by ClO₂ were researched by the single factor and orthogonal experimental analysis. The conclusion was follows: the primary and secondary order about factors of urban sewage sterilization disinfection affected by ClO₂ is contact time> reaction temperature> ClO₂ dosage> mixing speed≈pH values; the best conditions on inactivating bacteria by chlorine dioxide is the concentration of ClO₂ 2mg / L, and the contact time on sewage is 20 min, as well as the reaction temperature 40℃, pH value of 6, mixing rate 60 r / min. At this moment, the highest rate of ClO₂ disinfection can achieve 99.9%; the water disinfected by ClO₂ does not produce CHCl₃, and contents of CCl₄ and CHCl₃ is at the GB3838-2002 range, while the GB is standards to specific projects on centralized surface sources of drinking water.â‘¢based on the research of the sewage treatment factory located in the Northwest in Taiyuan, the treatment of urban sewage by ClO₂ was studied in this paper. Contrast to the existing disinfection and sterilization plant, the advice about transformation of its existing production technology on chlorine dioxide was proposed. This advice can improve disinfection Temperature and realize the water reuse ultimately.