One proposal for treating water in developing country is for
individual families to use a small,...
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Civil Engineering
One proposal for treating water in developing country is forindividual families to use a small, home made slow sand filterfollowed by storage of filtered water in a clear plastic bottleexposed to the sun for a day. Explain the purpose of the slow sandfilter and the mechanism that disinfects the water.
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Slow sand filters work through the formation of a layer called the hypogeal layer or Schmutzdecke in the top few millimetres of the fine sand layerSlow sand filters slowly lose their performance as the biofilm thickens and thereby reduces the rate of flow through the filter They utilise
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