Water treatment system
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United States of America Patent
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Apr 18, 2006
Grant Date -
Jul 8, 2004
app pub date -
Nov 1, 2001
filing date -
Nov 3, 2000
priority date (Note) -
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Abstract
A system suitable for the elimination of Cryptosporidium oocysts from water includes a filter bed comprising four layers of inert particulate material such that, from the top layer (first layer) to the bottom layer (fourth layer), the coarseness of the particles decreases while the density of the particulate material increases.
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