Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1996-01-26
1998-02-17
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
521 26, B01J 4900
Patent
active
057188289
ABSTRACT:
A method for minimizing wastewater discharge generated in an ion exchange regeneration system having a cation exchange bed and an anion exchange bed, which method is characterized in that all of the segments of regenerant and displacement rinse are recirculated in a common loop, and shifted forward by one position, whereby the first segment is discarded in the subsequent cycle, and the last segment in the subsequent cycle is provide by fresh rinse, while chemicals are added as necessary, and in final rinse cycle, rinse flows through the cation exchange bed and the anion exchange bed in series, and recirculates in a loop, thereby eliminating over 90% of waste.
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Jangbarwala Juzer
Michaud Charles F.
Cintins Ivars
Hydromatix Inc.
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