Electrodeionization (EDI)

Electrodeionization (EDI) is an advanced water purification process widely used in pharmaceutical water treatment and other high-purity applications. It combines electrolysis and ion exchange technology to remove dissolved salts and impurities, producing ultrapure water.

How EDI Works

EDI uses electrical current to remove dissolved ions from water. A typical EDI cell consists of an anode and cathode, separated by semi-permeable membranes. When an electrical voltage is applied, dissolved ions migrate through the membranes and are attracted to the electrodes, effectively removing them from the water.

Advantages of EDI

• Continuous deionization process without the need for chemical regeneration
• No additional consumables such as acids or bases, making it environmentally friendly
• Highly efficient removal of dissolved ions, ensuring a stable and consistent water quality

Applications of EDI

EDI is often combined with reverse osmosis (RO) to achieve ultrapure water with extremely low salt and impurity levels. It is used in industries requiring precise water quality control, including:

• Pharmaceutical production (e.g., injectable solutions, infusion fluids, and dialysis solutions)
• Biotechnology and laboratory applications
• Microelectronics and semiconductor manufacturing

By eliminating the need for chemical regeneration and offering a sustainable, high-efficiency process, EDI is a key technology in modern water purification systems for industries demanding the highest levels of purity.