What are the application of UV ultraviolet disinfection in water supply and drainage?

by:Tepro     2020-05-03
Water supply and drainage disinfection method is mainly divided into two categories, namely chemical disinfection method and physical disinfection method. Chemical disinfection method by chlorine disinfection and ozone disinfection, etc. ; Physical disinfection method with ultraviolet disinfection, etc. Chemical disinfection method generally produce disinfection by-products, and ultraviolet (uv) is the only capable of sterilization effect. The application of UV ultraviolet disinfection in water supply and drainage sterilization technology as a kind of physical disinfection way, broad-spectrum sterilization ability, no secondary pollution, after 30 years of development, has become a mature and reliable efficient disinfection technology of environmental protection, in various fields has been widely used abroad. In our country due to the understanding of the sterilization disinfection technology has some limitations, its application in wastewater treatment. Disinfection sterilization principle of sterilization principle is the use of appropriate wavelength of ultraviolet light to destroy microbial DNA in the body's cells ( Deoxyribonucleic acid) Or RNA ( Ribonucleic acid) The molecular structure of growing cell death and cause ( Or) Regenerative cell death, to achieve the effect of sterilization. After the test, sterilization of effective wavelength range can be divided into four different wavelengths: UVA ( 315nm ~ 400) 、UVB( 315 ~ 280海里) 、UVC( 280 ~ 200海里) And vacuum ultraviolet ( 200 ~ 100海里) 。 Which can reach the surface of the earth through the protective ozone layer, and the clouds part only UVA and UVB rays. In terms of sterilization speed, UVC in microbial absorption peak area, but by destroying microorganisms within 1 s DNA structure kill viruses and bacteria, and because UVA and UVB rays in microbial outside the scope of absorption peak, sterilization speed is slow, often take several hours to have antiseptic effect, in the actual engineering hydraulic retention (the number of seconds Radiation) Time, the part actually belongs to the invalid uv part. Vacuum ultraviolet penetration ability is very weak, tube and casing need to adopt high light transmittance of quartz, the semiconductor industry is commonly used in the TOC degradation of the water, is not used for sterilization. Therefore, water supply and drainage engineering in uv disinfection is actually refers to UVC disinfection. Uv sterilizer sterilization ultraviolet disinfection technology is based on modern epidemic prevention science, medicine and light dynamics, on the basis of using the special design of high efficiency, high strength and long service life of UVC ultraviolet light wavelengths of the water, water to all sorts of bacteria, viruses, parasites, algae and other pathogens directly kill, achieve the purpose of disinfection. Studies have shown that uv is mainly through to the microorganism ( Pathogens such as bacteria, virus, spores) Radiation damage and destroy the function of the nucleic acid kill microorganisms, thus achieve the purpose of disinfection. Ultraviolet (uv) on the function of nucleic acids can lead to the key and chain rupture, crosslinking and photochemical products, etc. , between stocks which changed the biological activity of DNA, the microbe itself cannot be copied, this uv damage is also fatal injuries. sterilization is a physical method, it does not increase any material into the water, no side effects, this is the place where it is better than that of chlorination, it is usually associated with other material used, common joint process include UV + + H2O2 + O3, H2O2, UV UV + TiO2, in this way, the disinfection effect will be better.
If you have a need for uv disinfection lamp submersible uv light, like , and , you need to be able to find a dependable provider who you can trust when necessary.
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