Electrodeionization (EDI) is a water treatment technology that uses DC Power, ion exchange membranes, and ion exchange resin to deionize water. EDI is usually a polishing treatment to reverse osmosis (RO). EDI differs from other RO polishing technologies such as chemically regenerated mixed beds, in that it is continuous and requires no chemical regeneration. — From Wikipedia
When EDI is fed with low total dissolved solids (TDS) feed (e.g., feed purified by RO), the product can reach very high purity levels (e.g., 18 megohms/cm, Resistivity ), it is call ultra-pure water.
Ultra -pure water made through EDI is often used in microelectronics industry, semiconductor industry, power generation industry, pharmaceutical industry and laboratory. In addition, EDI pure water can also be used as a pharmaceutical distilled water, food and beverage production water, chemical plant technology, and other ultra -pure water applications.
