Evaluation of chlorine decay kinetics expressions for drinking water distribution systems modelling

Research Article| October 01 1999 Evaluation of chlorine decay kinetics expressions for drinking water distribution systems modelling G. J. Kastl; G. J. Kastl * *Correspondence: E-mail: george.kastle@awtpl.com.au Search for other works by this author on: This Site PubMed Google Scholar I. H. Fisher; I. H. Fisher Search for other works by this author on: This Site PubMed Google Scholar V. Jegatheesan V. Jegatheesan Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (1999) 48 (6): 219–226. https://doi.org/10.2166/aqua.1999.0024 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Twitter LinkedIn Tools Icon Tools Cite Icon Cite Permissions Search Site Search nav search search input Search input auto suggest search filter All ContentAll JournalsThis Journal Search Advanced Search Citation G. J. Kastl, I. H. Fisher, V. Jegatheesan; Evaluation of chlorine decay kinetics expressions for drinking water distribution systems modelling. Journal of Water Supply: Research and Technology-Aqua 1 October 1999; 48 (6): 219–226. doi: https://doi.org/10.2166/aqua.1999.0024 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex The decay of chlorine in drinking water involves a complex set of reactions that is usually simplified to first order kinetics in models of water quality in distribution systems. However, to be useful in optimising chlorine dosing regimes, the kinetics expression should accurately describe the shape of the chlorine decay curve for different chlorine doses and be able to simulate re-chlorination. After considering the nature of the reactions involved in chlorine decay, five simplified reaction schemes were evaluated for their suitability to describe chlorine concentration in bulk water. Each scheme was fitted to a sample of experimental data of chlorine decay in raw water obtained from Warragamba Dam (the major source of water supplied to Sydney, Australia). A scheme involving two parallel reactions of organic carbon compounds with chlorine is both necessary and sufficient to satisfy the requirements of modelling chlorine decay accurately. This content is only available as a PDF.