Electrodeionization: Purifying Water to Ultra-High Levels

Electrodeionization (EDI) is an advanced water purification technology that combines ion exchange resins with an electrically active membrane system to produce ultra-pure water. Unlike traditional ion exchange processes that require chemical regeneration, EDI utilizes an electrical field to continuously regenerate the resins, resulting in a more sustainable and efficient purification method. This technology is crucial in industries demanding extremely high water purity, such as pharmaceuticals, microelectronics, and power generation.

The operational principle of EDI involves passing water through a chamber containing ion exchange resins and selectively permeable membranes. An electrical field is applied across the chamber, causing ions in the water to migrate through the membranes and into a separate concentrate stream.