Cross current staged reverse osmosis

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United States of America Patent

PATENT NO 11999643
APP PUB NO 20170349467A1
SERIAL NO

15613793

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Abstract

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Systems and processes for purifying and concentrating a liquid feed stream are disclosed. In the systems, the concentrated liquid output from the high pressure side of a reverse osmosis stage is used as the draw solution in the low pressure side of the reverse osmosis stage in a configuration called osmotically assisted reverse osmosis. This reduces the osmotic pressure differential across the membrane, permitting high solute concentrations to be obtained, hastening the purification of the liquid. Reduced system pressures are also obtained by arranging multiple osmotically assisted reverse osmosis stages in a cross-current arrangement. Overall system energy consumption is reduced compared to conventional thermal processes for high concentration streams.

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Patent Owner(s)

Patent OwnerAddress
BATTELLE MEMORIAL INSTITUTE505 KING AVENUE COLUMBUS OH 43201

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Argumedo, Darwin Columbus, US 17 58
Blohm, Kurt Columbus, US 8 23
Lane, Ann E Columbus, US 4 21
Peterson, Richard Columbus, US 16 181
Winecki, Slawomir Columbus, US 39 215

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