Disinfection of water by ultraviolet technologies is one of the most popular, economic and safe technologies of disinfection in the world. Ultraviolet energy causes permanent inactivation of microorganisms by disrupting their DNA so that they are no longer able to maintain metabolism or reproduce. The maximum effectiveness occurs at the wavelength range 240-280nm. Method of UV treatment requires no chemicals, does not produce harmful subproducts and does not influence taste, color, and smell of water, is controllable process.

Technology of UV disinfection is applied to removal of bacteria and their spores, viruses, chlorine, ozone, reduces TOC.