Electrodeionization (EDI), also known as Continuous Electrodeionization (CEDI), is an advanced water purification technology that continuously removes ionized and ionizable impurities from water using direct current (DC) power—without the use of chemicals.
Unlike traditional mixed-bed ion exchange systems that require periodic regeneration with hazardous acids and bases, EDI is a chemical-free solution that combines ion exchange resins with electrically active membranes and a DC electrical field. This process efficiently polishes reverse osmosis (RO) permeate to deliver consistent, ultra-pure water.
EDI modules consist of multiple chambers filled with ion exchange resins, separated by ion-exchange membranes. As water flows through the chambers:
Because contaminants are diverted into separate concentrate channels, the resins are not exhausted and can operate for years with minimal maintenance.
Our EDI systems are ideal for any industry requiring high-purity water without chemical regeneration:
Whether you’re looking to upgrade an aging ion exchange system or build a new high-purity water treatment train, our EDI solutions offer unmatched performance, cost-efficiency, and regulatory peace of mind.
Have questions about how to integrate EDI into your system? Our team is here to help. Contact us today for a consultation or to request a custom quote.