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Rapid water quality characterization for chlorine demand and THM formation in drinking waters

Jegatheesan, V., Weragoda, S. and Visvanathan, C. 2008, Rapid water quality characterization for chlorine demand and THM formation in drinking waters, Journal of water supply : research & technology - AQUA, vol. 57, no. 4, pp. 259-272, doi: 10.2166/aqua.2008.043.

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Title Rapid water quality characterization for chlorine demand and THM formation in drinking waters
Author(s) Jegatheesan, V.
Weragoda, S.
Visvanathan, C.
Journal name Journal of water supply : research & technology - AQUA
Volume number 57
Issue number 4
Start page 259
End page 272
Total pages 14
Publisher I W A Publishing
Place of publication London, England
Publication date 2008
ISSN 1606-9935
Keyword(s) chlorine decay
nitrogenous compounds
organic fractionation
organic/inorganic compounds
water quality modelling
Summary The quality of drinking water generally deteriorates when it is delivered through a distribution system due to the decay of disinfectant, which subsequently allows the re-growth of microorganisms in the distribution system in addition to the formation of trihalomethane (THM). Therefore, a model which describes the changes that occur in the water quality in the distribution system is needed to determine whether to enhance the treatment processes or to improve the distribution system so that microbiological criteria are met. In this paper the chlorine decay kinetics and THM formation in treated water is modeled considering the reaction of chlorine with fast and slow reacting organic and nitrogenous compounds which are present in that water. The treated water was also passed through three types of resins to fractionate very hydrophobic acids (VHA), slightly hydrophobic acids (SHA), hydrophilic charged (CHA) and hydrophilic neutral (NEU) compounds which are present in the water. Chlorine decay tests were conducted on the effluents emerging from the resins to evaluate the chlorine demand and THM formation potential of those organic fractions. The model shows that the CHA presented in the waters has a very high THM formation potential (around 62% of the THM produced). VHA, NEU and CHA contributed to chlorine demand in the water.
Language eng
DOI 10.2166/aqua.2008.043
Field of Research 090401 Carbon Capture Engineering (excl Sequestration)
Socio Economic Objective 969999 Environment not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2008, IWA Publishing
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Document type: Journal Article
Collection: School of Engineering
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