Abstract
The analysis of free chlorine concentrations in swimming pool water makes it possible to assess the antiseptic effect of the disinfectant. The concentration of combined chlorine determines the comfort of swimming and indicates if there is a threat from DBP (disinfection by-products). The distribution of free and combined chlorine concentration was analyzed in four basins differing in seasonality of use and in the applied water flow systems. After considering the distribution of free and combined chlorine content in characteristic points of pools, an attempt was made to determine the most reliable point for assessing the quality of water and its suitability for swimming. Such searches should aim to identify the places with the worst water quality. The most uniform distribution of the concentrations of both free and combined chlorine was observed at the middle point of swimming pools, while at points near the corners and walls of swimming pools a varied distribution was observed. Such a control strategy, based on the least favorable test results at a point considered as characteristic, would make it possible to verify the parameters of the swimming pool water treatment system and thus minimize the risk to swimmers’ health.
Highlights
The amount and type of disinfection by-products (DBP) in swimming pool water depends on the treatment technology, the number of swimmers and the intensity of swimming, the pool’s hydraulic system, the number of water exchanges during the day, swimming pool construction and the type of pollution introduced into the water together with the bathers [6,7,8,9,10]
The water circulation system used in SP4 pool is not recommended for public swimming pools
The distribution of free and combined chlorine concentration was analyzed in four basins differing in seasonality of use and in the applied water flow systems
Summary
The obligatory process of swimming pool water treatment is the disinfection with chlorine compounds due to the antiseptic effect of so-called “free chlorine”, and its ability to oxidize organic and inorganic compounds. The indicator of the DBP content in swimming pool water is combined chlorine [4,14,15,16]. These two parameters (the content of free and combined chlorine) are the basic parameters of swimming pool water quality, determining the level of health-safe bathing [1,17,18,19,20]
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