Process and system for recycling and reusing gray water

Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...

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210650, 210805, 210167, 2102572, 2101952, 210 98, B01D 6100

Patent

active

058689370

ABSTRACT:
A process and system recycles and reuses gray water generated by dishwashers, showers, carwashes, and clothes washers while maintaining the same cleaning performance as current systems. Hollow-fiber membrane ultrafiltration is used to reduce fresh water supply demands and gray water generation where voluminous quantities of the latter are generated. For a clothes washer, the gray water reuse or recycle system consists of a closed-loop water recycle which can be redirected to a storage tank for other applications, or directly used in situ with a clothes washer for subsequent rinse cycles. The process uses, at a minimum, 50% less water than conventional residential and commercial washers, and also decreases detergent requirements by 30% because a portion of the rinse water can be re-used for subsequent wash cycles.

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