Open AccessVirus removal efficiency of Cambodian ceramic pot water purifiers
Author(s) -
Hamidreza Salsali,
Edward A. McBean,
Joseph H. Brunsting
Publication year - 2011
Publication title -
journal of water and health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 59
eISSN - 1996-7829
pISSN - 1477-8920
DOI - 10.2166/wh.2011.087
Subject(s) - filtration (mathematics) , environmental science , suspended solids , water quality , pulp and paper industry , ceramic , water treatment , environmental engineering , portable water purification , filter (signal processing) , materials science , mathematics , biology , wastewater , metallurgy , ecology , engineering , statistics , electrical engineering
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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