Enhanced high water recovery membrane process

Details Enhanced high water recovery membrane process Enhanced high water recovery membrane process

2011-07-19

2011-07-19

Kim, John (Department: 1777)

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

C210S638000, C210S641000, C210S650000, C210S651000, C210S660000, C210S702000, C210S703000, C210S705000, C210S712000, C210S713000, C210S723000, C210S724000, C210S725000, C210S729000, C210S738000, C210S749000, C210S767000, C210S768000, C210S805000, C210S806000

Reexamination Certificate

active

07981295

ABSTRACT:
Disclosed is an economical process for the purification of water containing soluble and sparingly soluble inorganic compounds using single-stage or two-stage membrane processes that integrate membrane water purification with chemical precipitation softening and residual hardness and silica removal from the membrane concentrates using ion exchange resins and silica sequestering media, respectively. The purified water recovery is not adversely affected by design and/or operational deficiencies in the chemical precipitation softening system that may result in higher residual hardness and silica in the supernatant from the clarifier.

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patent: 6537456 (2003-03-01), Mukhopadhyay

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