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Online assessment of sand filter performance for bacterial removal in a full-scale drinking water treatment plant

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Title: Online assessment of sand filter performance for bacterial removal in a full-scale drinking water treatment plant
Authors: Fujioka, Takahiro / Ueyama, Tetsuro / Mingliang, Fang / Leddy, Menu
Issue Date: Aug-2019
Publisher: Elsevier Ltd.
Citation: Chemosphere, 229, pp.509-514; 2019
Abstract: Microbiological risks associated with drinking water can be minimized by providing enhanced integrity monitoring of bacterial removal by water treatment processes. This study aimed to evaluate the efficacy of real-time bacteriological counters for continuously assessing the performance of a full-scale sand filter to remove bacteria. Over the course of an 8-day evaluation, online counting of bacteria was successfully performed, providing continuous bacterial counts in the sand filter influent and effluent over approximate ranges from 17 × 10 4 to 94 × 10 4 and from 0.2 × 10 4 to 1.3 × 10 4 counts/mL, respectively. Periodic variations were observed with online bacterial counts in the sand filter influent because of the changes in the performance of flocculation and sedimentation processes. Overall, online removal rates of bacteria determined during the full-scale test were 95.2–99.3% (i.e., 1.3–2.2-log), indicating that online bacterial counting can continuously demonstrate over 1.3-log removal in the sand filter. Real-time bacteriological counting technology can be a useful tool for assessing variability and detecting bacterial breakthrough. It can be integrated with other online water quality measurements to evaluate underlying trends and the performance of sand filters for bacterial removal, which can enhance the safety of drinking water.
Keywords: Bacterial count / Drinking water / Online monitoring / Sand filtration
URI: http://hdl.handle.net/10069/39220
ISSN: 00456535
DOI: 10.1016/j.chemosphere.2019.04.197
Rights: © 2019 Elsevier Ltd. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: Journal Article
Text Version: author
Appears in Collections:Articles in academic journal

Citable URI : http://hdl.handle.net/10069/39220

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