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The FIF technology of fine filtration was studied, tested and patented by the engineers of SWS as an appropriate method to most conveniently replace sand filtration, under a large number of working conditions.
The devastating earthquake of 2005 severely damaged over 4000 water and sanitation schemes in northern Pakistan. The present study aimed at testing a low cost household sand filter (HSF) in treating low quality drinking water in disaster-hit areas of northern Pakistan. Two villages were randomly selected for practical demonstration of a low cost drinking water treatment system in earthquake affected...
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