FEDI - Electrodeionization - Water and Wastewater

The Fractional Electrodeionization (FEDI) process is an advancement of conventional EDI. The patented dual voltage process allows for a higher flexibility and tolerance to inlet water conditions, thus lowering the risk of scaling, and improving the plant’s design economics and reliability. By incorporating a two-stage separation process with different voltages the FEDI® process is able to: Achieve a higher hardness tolerance by having distinctly different concentrate chambers with separate reject streams and thus reducing the potential of hardness scaling. Optimize power consumption by using higher electrical current only where required. Ensure the best water quality, continuously & consistently by removing a major part of the deionization load in the ‘hardness removal zone’, while residual ionic impurities are effectively removed in the ‘silica removal zone’, which stays in a polishing mode.