CDI (ContinousDeionisation) technology is adopted.
The operating principle consists in the generation of an electrical field into the water stream, which is separating positive and negative ions, being than captured by ion exchange resins enclosed into the system. Captured salt ions are then released to a small stream of water (concentrate), recycled to the break tank of the PW system.
CDI technology also grant continuous regeneration of the resins, without the need of periodic regeneration by an external concentrate flow. In this way it is avoided the contact of the CDI modules with external and potentially contaminated stream of water.