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Disinfectant efficacy in distribution systems: a pilot-scale assessment

2008; UWA Publishing; Volume: 57; Issue: 7 Linguagem: Inglês

10.2166/aqua.2008.103

1365-2087

Graham A. Gagnon, Hélène Baribeau, Simon O. Rutledge, Robert Dumancic, Adrian Oehmen, Christian Chauret, Susan Andrews,

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Research Article| November 01 2008 Disinfectant efficacy in distribution systems: a pilot-scale assessment Graham A. Gagnon; Graham A. Gagnon 1Department of Civil & Resource Engineering, Dalhousie University, Halifax NS, Canada E-mail: graham.gagnon@dal.ca Search for other works by this author on: This Site PubMed Google Scholar Hélène Baribeau; Hélène Baribeau 2Carollo Engineers, Pasadena, CA, USA Search for other works by this author on: This Site PubMed Google Scholar Simon O. Rutledge; Simon O. Rutledge 1Department of Civil & Resource Engineering, Dalhousie University, Halifax NS, Canada Search for other works by this author on: This Site PubMed Google Scholar Robert Dumancic; Robert Dumancic 3Department of Civil Engineering, University of Waterloo, Waterloo, ON, Canada Search for other works by this author on: This Site PubMed Google Scholar Adrian Oehmen; Adrian Oehmen 4REQUIMTE/CQFB, Department of Chemistry, Universidade Nova de Lisboa, Caparica, Portugal Search for other works by this author on: This Site PubMed Google Scholar Christian Chauret; Christian Chauret 5Department of Biology, Indiana University Kokomo, Kokomo IN, USA Search for other works by this author on: This Site PubMed Google Scholar Susan Andrews Susan Andrews 3Department of Civil Engineering, University of Waterloo, Waterloo, ON, Canada Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2008) 57 (7): 507–518. https://doi.org/10.2166/aqua.2008.103 Article history Received: October 24 2007 Accepted: December 26 2007 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 Graham A. Gagnon, Hélène Baribeau, Simon O. Rutledge, Robert Dumancic, Adrian Oehmen, Christian Chauret, Susan Andrews; Disinfectant efficacy in distribution systems: a pilot-scale assessment. Journal of Water Supply: Research and Technology-Aqua 1 November 2008; 57 (7): 507–518. doi: https://doi.org/10.2166/aqua.2008.103 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Disinfection efficacy was evaluated in four pilot-scale systems that were operated at four water utilities across North America. Through this approach, factors which are difficult to simulate in a laboratory environment (such as water properties, process conditions, climatic conditions) were assessed, in order to determine their influence on disinfectant effectiveness. The results from this study show that a critical level of disinfectant residual (Ccrit) was necessary for inhibiting heterotrophic bacterial growth to less than 500 CFUml−1 in the effluent of these pilot-scale systems. When free chlorine was the disinfectant, this critical residual concentration was found to be approximately 0.6 mg L−1. A total chlorine concentration of 1 mg L−1 resulted in low bacterial counts with chloramine disinfectants, though approximately 10–20% of this residual was found to be comprised of slowly degradable organic chloramines which are less effective as disinfectants. A higher ductile iron pipe corrosion rate was observed with a free chlorine disinfectant as compared with chloramines. The results from this study are likely to be of interest to water utilities responsible for the operation and optimization of drinking water distribution systems. chlorine, corrosion, disinfection, monochloramine, organic chloramines, pilot-scale This content is only available as a PDF. © IWA Publishing 2008 You do not currently have access to this content.