People would always like to compare chlorine disinfection and UV disinfection. According to industry analysis, the traditional cost of chlorine disinfection is generally 0.5 ~ 1 cents / ton of water, and UV is the cost of 1 cent / tons of water about a certain degree of comparability. With the UV lamp and equipment to extend the life of the continuous optimization of the cost of the basic problems of UV disinfection is no longer a question of application. At present, more than 8,000 around the world the use of UV water treatment process of municipal wastewater treatment plant and water plant, and this data has been refreshed, with its own advantages of UV disinfection are inseparable.
UV can be a more economical solution to the two insects (Cryptosporidium, Giardia) issues. Health abroad generally water, the water of the existence of Cryptosporidium, there is heightened awareness of water safety and water quality standards over the past few years UV disinfection of municipal drinking water plant to be the main reason for the large-scale applications (UV can kill Cryptosporidium death),.
In addition, UV disinfection in the control of disinfection by-products and to ensure greater safety advantage. Disinfection by-products of the more harmful, such as trihalomethanes, haloacetic acids and salts are carcinogenic thinner, and in fact the actual existence of the water disinfection by-products than the standard set forth in the by-product to be a lot more.
Worldwidely, the area of UV water treatment applications in the early history, 70 years ago as a result of UV disinfection technology is not mature enough for large-scale limit the application of ultraviolet light. After the 80's and UV mature areas of sewage and water applications quickly, such as the size of 8.2 million m3 / d water plant in New York because the water quality is very good, after a simple precipitation, to the user for disinfection after water. 93 cities in the United States Cryptosporidium outbreak, because there is no filtering process, the New York water company tested contrast, has chosen to deal with UV disinfection of Cryptosporidium and expected water quality standards more stringent. In addition to New York, Washington, DC There is also a scale of one million m3 / d water plant used in UV disinfection.
Large number of disinfection in the present technologies are not an ideal means of a single disinfection, any technology has advantages and disadvantages, such as: chlorine disinfection of the security issue is mainly reflected in the use of disinfection by-products and the safety of the process and the inability to effectively control Cryptosporidium insects and other pathogens, ozone, permanganate, as well as the existence of olfactory economic issues, although recognized in all ultra-violet disinfection means in the most broad spectrum of micro-organisms can be the most economical control Cryptosporidia line virus disinfection but not very economic, the other in drinking water treatment in biological networks can not guarantee stability.
it is better to combine with different water quality, water conditions, the multi-barrier disinfection measures to ensure the safety of drinking water disinfection. A variety of means to combine the use of disinfection, each other, which is well-known UV disinfection experts point of view coincides with Liu. In addition UV + hydrogen peroxide advanced oxidation technologies including pollution control of micro-algal toxins such as good results, but also in North America, Europe and other places have been very successful project cases. For example, a certain well-known industry of the 21 water plants in California. The process design of the waterworks industry won a number of design awards.
it is better to combine with different water quality, water conditions, the multi-barrier disinfection measures to ensure the safety of drinking water disinfection. A variety of means to combine the use of disinfection, each other, which is well-known UV disinfection experts point of view coincides with Liu. In addition UV + hydrogen peroxide advanced oxidation technologies including pollution control of micro-algal toxins such as good results, but also in North America, Europe and other places have been very successful project cases. For example, a certain well-known industry of the 21 water plants in California. The process design of the waterworks industry won a number of design awards.
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