Virus removal efficiency is described for three types of silver-impregnated, ceramic water filters (CWFs) produced in Cambodia. The tests were completed using freshly scrubbed filters and de-ionized (DI) water as an evaluation of the removal efficiency of the virus in isolation with no other interacting water quality variables. Removal efficiencies between 0.21 and 0.45 log are evidenced, which is significantly lower than results obtained in testing of similar filters by other investigators utilizing surface or rain water and a less frequent cleaning regime. Other experiments generally found virus removal efficiencies greater than 1.0 log. This difference may be because of the association of viruses with suspended solids, and subsequent removal of these solids during filtration. Variability in virus removal efficiencies between pots of the same manufacturer, and observed flow rates outside the manufacturer's specifications, suggest tighter quality control and consistency may be needed during production.
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Research Article|
April 26 2011
Virus removal efficiency of Cambodian ceramic pot water purifiers
Hamidreza Salsali;
1School of Engineering, University of Guelph, Guelph, Ontario, Canada N1G 2W1
E-mail: [email protected]
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Edward McBean;
Edward McBean
2Canada Research Chair of Water Supply Security, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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Joseph Brunsting
Joseph Brunsting
1School of Engineering, University of Guelph, Guelph, Ontario, Canada N1G 2W1
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J Water Health (2011) 9 (2): 306–311.
Article history
Received:
May 16 2010
Accepted:
September 22 2010
Citation
Hamidreza Salsali, Edward McBean, Joseph Brunsting; Virus removal efficiency of Cambodian ceramic pot water purifiers. J Water Health 1 June 2011; 9 (2): 306–311. doi: https://doi.org/10.2166/wh.2011.087
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