Process of supplying water of controlled salinity
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United States of America Patent
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Jan 31, 2017
Grant Date -
Mar 26, 2015
app pub date -
Dec 4, 2014
filing date -
Jan 14, 2010
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Abstract
Desalination plant containing a plurality of membrane trains each having a plurality of RO membrane units and a plurality of NF membrane units. The ratio of RO membrane units to NF membrane units in each membrane train is in the range of 2:1 to 40:1, and each membrane train is provided with (a) a feed line for a source water that divides to provide a feed line for the RO membrane units and a feed line for the NF membrane units, (b) a permeate line for the RO membrane units and a permeate line for the NF membrane units that combine to provide an injection water line; (c) a retentate line for the RO membrane units and a retentate line for the NF membrane units; and (d) a flow controller and pressure let-down valve on the NF feed line.
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