Sulfate removal from aqueous waste streams with recycle
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United States of America Patent
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Issued Date -
Aug 16, 2012
app pub date -
Feb 8, 2012
filing date -
Feb 11, 2011
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Abstract
This invention provides for sulfate removal from a water source by a reverse osmosis (RO) or nanofiltration (NF) process where the concentrate stream is treated to precipitate and remove reject sulfate and recycle the discharged concentrate water and any backwash water used to clean a filter used to prepare feed water for the RO or NF process.
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