Potential effects of different disinfection methods on disinfection byproducts (DBPs) formation in swimming pool water
Date Issued
2015
Date
2015
Author(s)
Liu, Yung-Yu
Abstract
Swimming is one of the most popular sports around the world. Due to the presences of the rich organic substances and the microorganisms in swimming pools which could pose potential threats to swimmers, disinfection of the pool water is indeed essential for the better quality of the pool water. Chlorine and ozone/chlorine are the two most commonly used disinfection methods in swimming pools of Taipei. Somehow, such disinfectants would react with organic matters in the pools to form numerous disinfection byproducts (DBPs) including trihalomethanes (THMs), haloacetic acids (HAAs), haloacetonitriles (HANs), haloketones (HKs) and so on. These DBPs have been proven to lead to tumor formations of liver and kidney in animal studies and might be harmful to human health. Thus, it is necessary to assess the occurrences of DBPs and the effect of existed disinfection methods in swimming pools. The aims of this study are to evaluate the occurrences of various DBPs in swimming pool in Taipei and assess the potential effects of different disinfection technologies especially the role of ozone on the formations of various DBPs in swimming pools. This study comprised of both field sampling and laboratory simulations. Results of field sampling showed that there was a significant variation in the concentrations of TOC, TDN and THMs in pool water. Besides, there are also some differences between the pools treated with ozone/chlorine and chlorine. The results show that pools with ozone/chlorine disinfection have lower concentrations of HAAs, whereas it was surprisingly to find that higher concentrations of nitrogen-based DBPs such as HANs and HKs were also observed, which were reported to be more hazardous to human health than the carbonaceous DBPs. On the other hands, laboratory scale experiments were used to simulate the effects of ozone/chlorine and chlorine treatments for swimming pool water on DBPs formation. The results indicated that the effects of pre-ozone treatment on the occurrences of DBPs in pool water including the reductions of THMs and HAAs and potential increase of the concentrations of HKs.
Subjects
Swimming pools
disinfection byproducts (DBPs)
disinfection methods
ozone treatment
SDGs
Type
thesis
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