FEDI® - Fractional Electrodeionization

The Fractional Electrodeionization (FEDI®) stack was developed by taking into account the limitations of conventional Electrodeionization (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. FEDI stacks are available in three different models which can be applied either for higher hardness tolerance or high water flow rates.

Hardness is the scaling component and the main limiting factor for feed conditions in a conventional EDI. 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.

The current range of FEDI® products includes three distinct models:

1. FEDI-1 (Dual Voltage Operation)
2. FEDI-2 (Single or Dual Voltage Operation)
3. FEDI-2HF (Single Voltage Operation)

The unique features for each model are explained within the specifications contained in link below

Click Here To Download:
•FEDI® - Fractional Electrodeionization Brochure
•FEDI-1® - Fractional Electrodeionization Datasheet
•FEDI-2® - Fractional Electrodeionization Datasheet
•FEDI-2HF-30X® - Fractional Electrodeionization Datasheet