Quantitative microbial risk assessment of drinking water treated with advanced water treatment process

Abstract

Research Article| October 31 2013 Quantitative microbial risk assessment of drinking water treated with advanced water treatment process Liang Zhou; Liang Zhou 1Graduate School of Engineering, Kyoto University, C-1, Nishikyo, Kyoto 615-8540, Japan E-mail: [e-mail] Search for other works by this author on: This Site PubMed Google Scholar Shinya Echigo; Shinya Echigo 1Graduate School of Engineering, Kyoto University, C-1, Nishikyo, Kyoto 615-8540, Japan Search for other works by this author on: This Site PubMed Google Scholar Yumiko Ohkouchi; Yumiko Ohkouchi 2Department of Environmental Sciences, Azabu University, Fuchinobe, Chuou-ku, Sagamihara, Kanagawa 252-5201, Japan Search for other works by this author on: This Site PubMed Google Scholar Sadahiko Itoh Sadahiko Itoh 1Graduate School of Engineering, Kyoto University, C-1, Nishikyo, Kyoto 615-8540, Japan Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2014) 63 (2): 114–123. https://doi.org/10.2166/aqua.2013.006 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 Liang Zhou, Shinya Echigo, Yumiko Ohkouchi, Sadahiko Itoh; Quantitative microbial risk assessment of drinking water treated with advanced water treatment process. Journal of Water Supply: Research and Technology-Aqua 1 March 2014; 63 (2): 114–123. doi: https://doi.org/10.2166/aqua.2013.006 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Campylobacter jejuni is one of the major causes of waterborne disease in Japan. A quantitative microbial risk assessment (QMRA) was conducted to evaluate the health risk caused by this pathogen in drinking water treated with a supposed advanced treatment process including ozonation and granular activated carbon adsorption. Coagulation-sedimentation, rapid sand filtration, ozonation, and chlorine disinfection are considered as the main microbial barriers of the process. The overall removal efficacy by four treatment steps was estimated to be the median and mean values of 11.1 log10 and 10.4 log10, respectively. The mean value of the yearly risk of infection was estimated to be 1.09 × 10−7 infection/person/yr. The sensitivity analysis shows that the complete removal of suspended solids and particulates in the source water is extremely important to stably produce safe drinking water. The uncertainty analysis demonstrated that the factor with large impact on yearly risk of infection was the hydraulic condition of ozone contactor. It can be pointed out that an accurate estimation for the dispersion number for full-scale ozone contactor is needed. Furthermore, data collection to determine the C. jejuni/Escherichia coli (C/E) ratio in the source water is highly required to improve the accuracy of the quantitative microbial risk assessment (QMRA). advanced water treatment process, C. jejuni, QMRA, removal and inactivation efficacy, sensitivity analysis, uncertainty analysis This content is only available as a PDF. © IWA Publishing 2014 You do not currently have access to this content.