Disinfection is an important part in wastewater treatment. Ultraviolet (UV) disinfection has developed into a mature and reliable disinfection technology. It has been widely used in various fields in foreign countries, and has become the mainstream technology to replace the traditional chemical disinfection methods. Because of the physical disinfection methods, the application of ultraviolet disinfection equipment, ultraviolet disinfection in sewage treatment, etc., with a broad spectrum of sterilization, no two pollution, such as absolute advantage.
Ultraviolet (UV) disinfection technology originated from 1960s, humans began to UV disinfection technology should be in city sewage treatment, this is because of the people have been aware of the use of chlorine residual chlorine disinfection process in water toxic to fish and other organisms, and chlorine disinfection and other chemical disinfection methods will produce three halomethane such as carcinogenic gene, by-product induced distortion. It was found that ultraviolet disinfection in urban sewage treatment will not produce disinfection by-products. After entering the twenty-first Century, ultraviolet disinfection technology will be more promotion, from the domestic, it is expected that the future conditions of the sewage treatment plant in 50% will be the use of ultraviolet disinfection.
How to use ultraviolet UV disinfection application in water supply and drainage engineering refers to UVC disinfection disinfection, in principle, UV disinfection technology is the foundation of modern science, medical and epidemic prevention in the light of dynamics, using specially designed UVC band high efficiency, ultraviolet radiation water high strength and long life, the bacteria, parasites, viruses, algae and other pathogens directly kill, to achieve the purpose of disinfection. UV disinfection is a physical method, need not add any substance to the water, no side effects, which is superior to the disinfection place, usually used in combination with other materials, combined process of common UV+H2O2, UV+H2O2+O3 etc., can obtain better disinfection effect.
Application of ultraviolet disinfection in drainage in after years of research and practice, which mainly consists of UV disinfection technology, with good effect has become the preferred advanced water purification. And the ultraviolet disinfection method is applied to the two stage treatment of municipal wastewater disinfection can meet the requirements of landscape and green water. After ultraviolet disinfection of sewage can effectively achieve water resource for irrigation, farmland, woodland and lawn, can avoid the damage of chemical disinfectants on plants; used for groundwater recharge can prevent microbial adaptation to chemical disinfectants and re formation blockage caused by reproduction. Ultraviolet disinfection will become the mainstream technology to replace the traditional chemical disinfection method.
