Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1997-07-25
1999-09-14
Cintins, Ivars
Liquid purification or separation
Processes
Ion exchange or selective sorption
210677, 210678, 210685, 521 26, B01J 4900
Patent
active
059518740
ABSTRACT:
Wastewater discharge, which is generated in an ion exchange regeneration system having a cation exchange bed and an anion exchange bed, is minimized by circulating a displacement rinse through a cation exchange bed, saving an effluent of the displacement rinse to be used as a regenerant solution in a subsequent cycle, circulating the remaining rinse in the cation exchange bed through an anion exchange bed that has been exhausted by service flow, circulating a displacement rinse through the anion exchange bed, and circulating a final rinse through the cation and anion exchange beds. The volume of wastewater discharge can be reduced to a degree of approximately 80-90% of a typical conventional system, i.e., waste water discharge can be reduced to 1-2 bed volumes. Storage tanks, automation valves, etc. can be eliminated while high reduction of wastewater discharge is effected.
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Jangbarwala Juzer
Michaud Charles F.
Cintins Ivars
Hydromatix Inc.
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