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 Electro Deionization (EDI) can be

 described as a combination of

 Membrane Technology and Ion

 Exchange Technology.

 The most common application is as a

 RO (Reverse Osmosis) permeate

 polishing step.

 The EDI can be an alternative or a

 complement to a Mixed Bed Filter.

 The EDI contains Ion Exchange Resin

 that is continuous regenerated by




Examples of EDI

There are several types of EDI with different performance and capacity.

Most of them are limited in size and must be module connected in parallel for higher capacity.

The most common types are:


   - Lamella type (plate and frame)

   - Spiral wound


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