What is EDI?

High purity water production has traditionally used a combination of membrane separation and ion exchange processes. EDI is a process which combines semi-impermeable membrane technology with ion-exchange media to provide a high efficiency demineralization process.

Electro dialysis employ electrical current and specially-prepared membranes which are semi permeable to ions based on their charge, electrical current, and ability to reduce the ions based to their charge. Through electro dialysis an electrical potential transports and segregates charged aqueous species. The electrical current is used to continuously regenerate the resin, eliminating the need for periodical regeneration.

The EDI process produces industrial process water of very high purity, using less than 95% of the chemical products used in the conventional ion exchange processes. With EDI system membranes and electricity replace the million gallons of acid and caustic chemicals that the old processes required daily.

Applications

EDI is useful for any application that requires constant and economic removal of water impurities without using dangerous chemical. Some examples are:

Reuse of residual water in food and beverages industry

Chemical production

Biotechnology

Electronics

Cosmetic

Laboratories

Pharmaceutical industry

Boiler Feed Water

Reduction of ionizable SiO2 and TOC (total organic carbon)