After raw water is treated, if it is to reach the drinking water standards, then it is definitely to be sterilized. The most common is uv
UV Water Purification System principle:
The UV wavelength in the range of 240 ~ 280nm most destructive bacterial virus DNA (DNA) or RNA (RNA) molecular structure, resulting in the growth of cell death and (or) regenerative cell death, To achieve the effect of sterilization. Especially in the wavelength of 253.7 UV disinfection most strongly. This band coincides with the range of UV absorbance and photochemical sensitivity of DNA in the microbial cell nucleus, as shown below. In the figure, the absorption spectra of ribonucleic acid and deoxyribonucleic acid are shown in the range of 240-280 nm and the absorption peak at 260 nm. It is generally believed that ultraviolet light can change and destroy structural mutations, change the genetic transcriptional characteristics of cells, so that organisms lose the ability of protein synthesis and reproduction.
UV wavelength range: 100 nm TO 400 nm
UV-A : 315 – 400 nm
UV-B : 280 – 315 nm
UV-C : 200 – 280 nm
Vacuum UV: 100 – 200 nm
Note: 1 nm = 10-9 m = 10 Angstroms
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