The Dual Voltage FEDI® Process utilizes an advanced Electro deionization concept that removes the strongly and weakly ionized impurities into two separate and independent stages by applying different electrical voltages at each stage. On these dual voltage systems, the first stage is operated at a lower voltage and current and removes the strongly ionized species (i.e. Calcium, Magnesium, Sodium, Sulphates, Nitrates, Chlorides, etc.). The second stage is operated at a higher voltage and current and removes the weakly ionized species like boron and silica. By removing the ions associated with scaling (calcium and magnesium) into a separate, slightly acidic waste stream, the FEDI® process is highly immune to what is the most common scaling problem plaguing the other EDI processes.
