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The Solutionfor chemical-free deionization
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EDI is a revolution in chemical-free Deionization.
This robust, modular electrodeionization (EDI) technology is
cost-effective for all flow rates. |
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| Features |
| No regeneration chemicals |
| No hazardous waste stream |
| Simple, continuous operation |
| Reduced facility requirements |
| Flow rates up to 2000 gpm and beyond |
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How EDI Works
Electrodeionization (EDI) removes ions from water using conventional
ion-exchange resin. Multiple beds of ion-exchange material are arranged in
narrow rectangular spaces contained between sheets of ion-exchange
membranes. The deionization takes place in this resin bed, much as in
conventional mixed bed ion-exchangers. Membranes allow for the delivery of
pure water and the removal of impurities. The key difference between EDI
and conventional DI systems lies in the method used for regeneration. In
EDI systems, regeneration is achieved by using a DC voltage to create a
current through the resin bed. Because each bead of resin touches an
adjacent bead, the ions can migrate from one bead to the next, in the
direction of the electrode, through the membrane, and are removed from the
system with the concentrate waste stream. |
