Electrodeionization (EDI)
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What is EDI?
Electrodeionization or EDI, is a continuous and chemical-free process of removing ionized and ionizable species from the feed water using DC power. EDI is typically used to polish reverse osmosis (RO) permeate and to replace conventional mixed bed ion exchange, which eliminates the need to store and handle hazardous chemicals used for resin regeneration and associated waste neutralization requirements.
The patented DOW™ EDI module utilizes a unique, leak free, low maintenance spiral wound design containing membrane (see below) and ion exchange resins, sealed in a high-strength fiberglass reinforced plastic (FRP) pressure vessel. DOW™ EDI modules optimize performance, maintain continuous product quality and can produce up to 18 M -cm high-purity water with high silica and boron rejection.
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®™* Trademark of The Dow Chemical Company ("Dow") or an affiliated company of Dow
