摘要：

Influence of UV-chlorination sequence application on swimming pool water quality was investigated. In addition, an analysis of operating costs of such system was conducted. The study was based on a real facility, i.e. the swimming pool of AGH University of Science and Technology in Krakow. In the facility, water disinfection with calcium hypochlorite was carried out, assisted by UV irradiation. Switching the UV lamps temporarily off allowed for comparative studies on the quality of pool water disinfected by pure chlorination and by the UV and chlorination sequence. For these two variants of the swimming pool water disinfection several physico-chemical and microbiological parameters were analyzed, including the disinfection by-products. Cost analysis included the consumption of chemical agents and the UV lamp operation. It was established that the UV technology did not contribute to the expected improvement in the pool water quality in terms of the combined chlorine removal, however it did cause an increase in the concentration of selected organic chlorination by-products. Moreover, application of the UV lamp to the pool water treatment system increased the chlorine demand and, consequently, the consumption of calcium hypochlorite. Combined with the need to exchange lamp fi laments, it raised the operating costs of the pool water treatment technology.

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