Liquid purification or separation – Casing divided by membrane into sections having inlet
Reexamination Certificate
2005-12-06
2011-12-27
Menon, Krishnan S (Department: 1777)
Liquid purification or separation
Casing divided by membrane into sections having inlet
C210S652000, C210S640000, C210S259000, C210S641000, C203S010000, C203S011000
Reexamination Certificate
active
08083942
ABSTRACT:
The present disclosure provides methods and systems for purifying liquids. In a particular implementation, the system includes a forward-osmosis unit for diluting a water source for a downstream desalination unit. A pretreatment unit may be located hydraulically upstream of the desalination unit, such as upstream or downstream of the forward-osmosis unit. In certain embodiments, the system includes an extraction unit for extracting a relatively easily extractable osmotic agent from an osmotic draw solution. The system may include one or more forward-osmosis units downstream of the desalination unit for diluting a concentrated brine stream produced by the desalination unit. In particular embodiments, a downstream forward-osmosis unit uses the concentrated brine stream as an osmotic agent, such as to extract water from seawater or brackish water. Another downstream forward-osmosis unit may use impaired water as a feed stream.
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Cath Tzahi Y.
Childress Amy E.
Board of Regents of the Nevada System of Higher Education, on Be
Klarquist & Sparkman, LLP
Menon Krishnan S
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