According to related statistics, currently in the bidding of ultraviolet disinfection system for sewage treatment plants in China, some sewage treatment plant due to the large number of industrial wastewater into the sewage discharge, color deepened, but the value of sewage ultraviolet transmittance parameters in the bid invitation documents are still using the foreign supply, causing great difference with domestic sewage situation, for the future UV disinfection equipment operation to achieve the requirements, leaving a formidable obstacles. In this situation, a big problem for the UV ultraviolet light is also faced with, so in addition, will face what the problem?
In fact, when the sewage flows through the ultraviolet sterilizer, of which there are many inorganic impurities precipitation, adhere to the casing wall. Especially when the high organic content in the sewage are easier to form fouling membrane, microbial growth and biofilm formation of easy transmission, these will inhibit ultraviolet disinfection effect, influence. Therefore, the cleaning work of quartz tube wall is the key to the operation and repair.
In addition, there are some domestic unqualified ultraviolet light disinfection capacity can not provide the remaining, after leaving the reactor for water treatment, some by UV photoreactivation killing of microbes in the molecular mechanism of DNA will repair the damage, the bacteria growth, this is also the reason of adverse consequences.
From the above results, UV lights, although there are a lot of use to the industry, but also affect the environment, which is currently encountered has not solved very well one of the problems, but if the part can be more attention, find a method, or reduced to minimum the harm to the environment.
Source: http://www.vipuv.cn