摘要：The article assesses the effects of use of ultraviolet radiation
and electrolytically generated sodium hypochlorite on the quality of
drinking water produced at “Raba” plant of the Municipal Water and
Sewerage Company in Cracow as well as in the water supply network. The
analysis included selected microbiological indicators, total organic carbon,
water chlorination products from the group of trihalomethanes and free
chlorine. The research conducted indicated that disinfectant change caused
quantitative changes in THMs and free chlorine in water supplied to the
water supply network. After an upgrade of the chlorination plant in 2014,
an increase in water disinfection by-products at most of the tested points of
the water supply network was observed. A sudden decrease in free chlorine
in the distribution system was also observed in that period, whereas
a bacteriological water analysis confirmed the effectiveness of use of the
new water disinfection technology.
其他摘要：The article assesses the effects of use of ultraviolet radiation and electrolytically generated sodium hypochlorite on the quality of drinking water produced at “Raba” plant of the Municipal Water and Sewerage Company in Cracow as well as in the water supply network. The analysis included selected microbiological indicators, total organic carbon, water chlorination products from the group of trihalomethanes and free chlorine. The research conducted indicated that disinfectant change caused quantitative changes in THMs and free chlorine in water supplied to the water supply network. After an upgrade of the chlorination plant in 2014, an increase in water disinfection by-products at most of the tested points of the water supply network was observed. A sudden decrease in free chlorine in the distribution system was also observed in that period, whereas a bacteriological water analysis confirmed the effectiveness of use of the new water disinfection technology.
