Abstract
Research Article| June 01 2011 Electrochemically activated water as an alternative to chlorine for decentralized disinfection K. Ghebremichael; K. Ghebremichael 1Department of Urban Water and Sanitation, UNESCO-IHE, Westvest 7, PO Box 3015, 2601 DA Delft, The Netherlands E-mail: k.ghebremichael@unesco-ihe.org Search for other works by this author on: This Site PubMed Google Scholar E. Muchelemba; E. Muchelemba 1Department of Urban Water and Sanitation, UNESCO-IHE, Westvest 7, PO Box 3015, 2601 DA Delft, The Netherlands Search for other works by this author on: This Site PubMed Google Scholar B. Petrusevski; B. Petrusevski 1Department of Urban Water and Sanitation, UNESCO-IHE, Westvest 7, PO Box 3015, 2601 DA Delft, The Netherlands Search for other works by this author on: This Site PubMed Google Scholar G. Amy G. Amy 2Water Desalination and Reuse Center, Kaust, Saudi Arabia Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2011) 60 (4): 210–218. https://doi.org/10.2166/aqua.2011.034 Article history Received: June 28 2010 Accepted: January 24 2011 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation K. Ghebremichael, E. Muchelemba, B. Petrusevski, G. Amy; Electrochemically activated water as an alternative to chlorine for decentralized disinfection. Journal of Water Supply: Research and Technology-Aqua 1 June 2011; 60 (4): 210–218. doi: https://doi.org/10.2166/aqua.2011.034 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Electrochemically activated (ECA) water is being extensively studied and considered as an alternative to chlorine for disinfection. Some researchers claim that ECA is by and large a chlorine solution, while others claim the presence of reactive oxygen species such as ozone and hydroxyl radicals in addition to chlorine. This study compares sodium hypochlorite (NaOCl) and ECA in terms of disinfection efficacy, trihalomethanes (THMs) formation, stability and composition. The studies were carried out under different process conditions (pH 5, 7 and 9, disinfectant concentrations of 2–5 mg/L and dissolved organic carbon (DOC) concentration of 2–4 mg/L). The results indicated that in the presence of low DOC (<2 mg/L) ECA showed better disinfection efficacy for Escherichia coli inactivation, formed lower THM and had better stability compared with NaOCl at both pH 5 and 7. Stability studies of stock solutions showed that over a period of 30 days, ECA decayed by only 5% while NaOCl decayed by 37.5% at temperatures of 4 °C. In a fresh ECA of 200 mg/L chlorine, about 5.3 mg/L ozone and 36.9 mg/L ClO2 were detected. The study demonstrates that ECA could be a suitable alternative to NaOCl where decentralized production and use are required. anolyte, disinfection, ECA, E. coli, sodium hypochlorite, THM This content is only available as a PDF. © IWA Publishing 2011 You do not currently have access to this content.
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