Electrodeionization (EDI) is a process to remove impurities from water. EDI uses electricity to deionize water and is often a polishing treatment to reverse osmosis (RO). Unlike other water treatment technologies, EDI does not employ chemical methods. One EDI provider, Agape Water Solutions, notes that industrial operations can take advantage of EDI and continuous electrodeionization (CEDI) technologies to produce ultrapure water with no hazardous chemicals.

The experts at Agape Water Solutions recommend that companies seeking EDI technologies consider whether they require a pre-engineered or custom engineered solution. In both cases, the EDI system is fed pre-filtered and dechlorinated water with a low concentration of total dissolved solids (TDS). Electrical DC power is passed between a positive electrode (cathode) and negative electrode (anode) to allow regeneration of ion exchange resin. Ion exchange resin similar to mixed bed resin is used for separation of positive and negative ions and contaminants. The DC power regenerates the resin and attracts the oppositely charged ions into the concentrate waste stream. The end product is high-purity deionized water.

Today, standalone EDI and CDI solutions are available to companies with existing RO systems. Or, companies can implement packaged RO-EDI solutions. Either way, the users benefit from reduced waste streams and reliable output of ultrapure water for manufacturing applications.

About Agape Water Solutions:
Agape Water Solutions, Inc., based in Harleysville, Pennsylvania, provides a variety of water treatment techniques for large industrial operations.

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