Cost-effective, reliable, chemical-free permeate polishing

Electrodeionization (EDI) is a continuous, chemical-free process of removing ionized and ionizable species from feedwater using DC power. EDI is typically used to polish reverse osmosis (RO)  permeate, and is a smart alternative to — and effective replacement of — conventional mixed bed ion exchange (IX).Using electrodeionization eliminates the need to store and handle the hazardous chemicals used for resin regeneration in mixed beds. Since electricity is EDI’s only consumable, this method of permeate polishing does not produce a hazardous waste stream. 

Dupont proven, patented EDI modules can optimize performance, maintain continuous product quality, and produce high-purity water, with high contaminate-ion rejection.

DUPONT Electrodeionization (EDI) modules

DUPONT EDI-310