Electrodeionization

LWT Engineering carries out design, manufacture, installation and commissioning of water ozonation units. 

Electrodeionization (CEDI) is the most cost-effective process of continuous total water demineralization using ion-exchange resins, ion-selective membranes and direct electric current (voltage field). Obtained water is demineralized with the resistance of 12 to 18.2 MΩ/cm or with a specific electrical conductivity of 0.08 to 0.055 μS/cm. The main force of the electrodeionization processes is the potential difference of a constant electric field on the both sides of the membrane channel that is formed by ion and cation exchange membrane and filled with ion exchange resin. It is the constant voltage that provides the transfer of dissolved ions from the stream of desalinated water through ion-selective membranes into the discharge stream of concentrated water, thereby causing continuous regeneration of the ion exchange resin. 

The use of electrodeionization 

• Heat power industry - preparation of recharging water for high-pressure steam boilers 
• Microelectronics - water for crystal washing 
• Pharmaceuticals - obtaining water for injection.