HIGH RECOVERY SULFATE REMOVAL PROCESS
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United States of America Patent
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Issued Date -
Jul 7, 2011
app pub date -
Sep 17, 2009
filing date -
Sep 17, 2008
priority date (Note) -
Abandoned
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Abstract
A high recovery sulfate removal process comprises treating a feed water stream conditioned with antiscalant from a source with a reverse osmosis membrane system to produce a purified water permeate stream and a reject stream containing the retained or rejected ions and organic matter. The reject stream is further treated to remove dissolved and suspended species. The reject stream flows to a desaturation/clarification process. A preferred process includes a constant stirred tank reactor (CSTR) where co-precipitation agent is added followed by a clarifier. Water recycled from the clarifier overflow is blended with feed water stream. The removed solids are collected as sludge or a slurry and disposed of in a manner consistent with applicable regulations.
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