Light expanded clay aggregates for phosphorous removal
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United States of America Patent
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-
Sep 30, 2003
Grant Date -
Dec 5, 2002
app pub date -
Feb 21, 2001
filing date -
Oct 7, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Sintered light expanded clay aggregates are described that are prepared by expanding and firing a clay-based material, and where the finished aggregates have a diameter of up to about 32 mm, for use as filtration medium for purifying water, wherein carbonates of calcium and/or magnesium are added to the clay as flux material prior to expansion and firing. Uses of the expanded clay aggregates for removing phosphorous by utilising die clay aggregates are also described, as well as a method for removing phosphorus by using the clay aggregates.
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