Combined method of UV treatment and ozonation during water disinfection in swimming pools

Abstract

Operation of pools requires a complex of measures for filtering and disinfection of water. An extremely urgent task when disinfecting water in swimming pools is the use of UV-technologies, which completely eliminate pathogenic microflora and do not result in formation in the process of decontamination of toxic compounds. Bacteriological studies of water in the pool found that ultraviolet decontamination does not meet the requirements of the general microbiological number of CFU/cm3, since there is no after radiation. The technology of complex water disinfection in swimming pools is proposed with the help of UV radiation and with the use of ozone formed by short-wave UV radiation of lamps. The study of the effectiveness of bactericidal decontamination of water using the installation was carried out in a pool of 80 m3. This installation provides a dose of irradiation of water not less than 250 J/m2 and additional ozonation with an amount of ozone of approximately 0,1 g/m3 of water. In order to ensure circulation of water, at least 5 times the exchange, two sets of capacity of 10 m3/h were installed per day. At additional ozonation, the microbiological number does not exceed 25 CFU/cm3. Additional ozonation (with a dose of 0,1 g/m3) using the UV technology of disinfection of water provides the necessary bacteriological purity of water in small pools, while the residual concentration of ozone in water does not exceed 0,015 mg/l.