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.
DOW™ Electrodeionization EDI-310 modules are made using a patented spiral wound design containing membrane and ion exchange resins sealed in a high strength fiberglassed reinforced plastic (FRP) pressure vessel. The modules can be used in place of conventional mixed bed ion exchange for polishing of reverse osmosis (RO) permeate eliminating the need to store and handle hazardous chemicals. DOW™ EDI modules optimize performance, maintain continuous product quality and can produce up to 18 megohm-cm product water for high purity and ultrapure industrial water applications.
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