Patent ID: 7097752

Claim:
An electrodeionization device comprising: an anion exchange membrane; a cation exchange membrane; a first electrode; at least one membrane bag formed by the anion exchange membrane and the cation exchange membrane; an axially extending conduit a second electrode; said at least one membrane bag having a concentrate flow channel; a dilute flow channel located adjacent said at least one membrane bag, said at least one membrane bag and said dilute flow channel forming an inner module having a first end and a second end opposite the first end; a first insert of filter material arranged at the first end of said inner module; a second insert of filter material arranged at the second end of said inner module, said first and second inserts of said filter material including layers of material formed from an alkene polymer having microscopic channels evenly distributed thoughout the layers, said first and second inserts of filter material arranged to allow water to flow through while inhibiting resin from flowing through; and a housing for the foregoing components.