PROCESS FOR WATER TREATMENT PRIOR TO REVERSE OSMOSIS
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United States of America Patent
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app pub date -
Apr 5, 2016
filing date -
Mar 14, 2013
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
A process for treating feedwater with a microfiltration or ultrafiltration membrane unit and a downstream reverse osmosis unit. An aluminum salt coagulant is added and mixed with the feedwater upstream of a membrane separation unit. An aluminum salt coagulant is added and mixed with the wastewater upstream of the membrane separation unit. The membrane separation unit produces a permeate that is directed to the reverse osmosis membrane. The concentration of aluminum in the permeate is controlled by controlling the hydraulic residence time for aluminum salt reaction products in a concentrate loop associated with the membrane separation unit.
First Claim
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