EDI (Electro Deionization) Module
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EDI（Electro Deionization）module is a new technology that combines electrodialysis and ion exchange for continuous water purification. It uses mixed ion exchange resin to adsorb anions and cations in the feed water. Then, under the action of DC voltage, these adsorbed ions are removed by passing through the anion and cation exchange membrane into the concentrated water chamber, respectively. At the same time, the water will dissociate under DC voltage to produce enough H+ ions and OH– ions for continuous deep desalination. This new technology can replace conventional ion exchange (DI) to make pure water with resistivity up to 18 MΩ.
1. No Chemical Regeneration of Ion Exchange Resin with Acid and Alkali
The most significant advantage of EDI is that it no longer needs to regenerate the ion exchange resin with acid and alkali, which saves a lot of acid and alkali and cleaning water, thus making it more friendly to the environment. At the same time, it also dramatically reduces the labor intensity of operators.
2. Easy Operation and Automatic Process Control
EDI is easy to operate and manage, with a low failure rate and easy-to-realize automatic control of the process. Moreover, it combines reverse osmosis (RO), ultrafiltration (UF), and other water treatment technologies. Using reverse osmosis technology for primary desalination and EDI technology for secondary desalination can ultimately make the pure water manufacturing process continuous, thus forming a perfect high-purity water production line.
3. Today’s Most Advanced High Purity Water Production Technology
The organic combination of electrodialysis and ion exchange technology retains the advantages of continuous electrodialysis by electrodialysis and deep desalination by ion exchange. In addition, it can operate continuously with minimal ion exchange resin usage and no waste acid and alkali discharge, which is a clean production technology and green product.
4. Provide Stable Water Quality and Low Operating Cost
EDI technology is a revolution in the water treatment industry. Compared with traditional ion exchange (DI), it has no downtime due to resin regeneration. As a result, the effluent quality is stable, and the service life can be more than three years. At the same time, EDI adopts a fully enclosed design, eliminating leakage, modular combination, easy to adjust the system water volume, low operating voltage, and low energy consumption, thus reducing operating costs.
