Systems, Apparatus, and Methods for a Water Purification System
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United States of America Patent
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Issued Date -
May 23, 2013
app pub date -
Sep 14, 2012
filing date -
Sep 15, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A water purification system comprising a cross-flow filter is arranged to permit recirculation of the retentate or reject water from the retentate outlet of the filter to the inlet of the filter. A first pump is configured to pump source water into the feed water path of the filter, and to raise the fluid pressure in the feed water path and recirculation path. A second pump is configured to recirculate water from the retentate outlet of the filter to the inlet of the filter at a flow rate substantially higher than the flow rate of water generated by the first pump. A drain path connected to the recirculation path or feed water path may include a flow restrictor to permit removal of highly concentrated reject water while maintaining a minimum fluid pressure within the recirculation flowpath.
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