Demineralization is roughly the process of elimination minerals in the water, namely the cations and anions.
This process is performed by using anionic and cationic resins in the separate columns. Systems in which Anionic and Cationic resins are in the same column are called “Mixed-bed ion exchanger”.
Water, separated from its anions and cations at system output, gets purified at a high rate.
During regeneration, anionic resin regenerate itself with caustic and cationic resin regenerate itself with acid.