Electrodeionization and ultraviolet light treatment method for purifying water

The process for purifying water to remove organics and ionic species therein which comprises:

• exposing said water to ultraviolet radiation to effect oxidation of said organics,
• providing an said electrodeionization apparatus comprising;
• a cathode compartment at a first end of said apparatus,
• an anode compartment at an end of said apparatus opposite said first end,
• a plurality of said ion depletion compartments alternating with ion concentration compartments positioned between said cathode compartment and said anode compartment,
• each of said ion depletion compartments comprising a spacer and a plurality of subcompartments formed by a plurality of ribs extending along the length of each of said ion depletion compartments, each of said subcompartments containing an ion exchange solid composition, each of said subcompartments having a width defined by the distance between said ribs of between about 0.3 and 4 inches and a thickness as defined by the distance between an anion permeable membrane and a cation permeable membrane in said ion depletion compartments is between 2.0 and 0.5.
• an anion permeable membrane and a cation permeable membrane,
• said anion permeable membrane and said cation permeable membrane being bonded to a spacer to effect sealing against water leakage between said ion depletion compartment and,
• passing said water exposed to ultraviolet radiation through the ion depletion compartments of said depletion compartments of said electrodionization apparatus,
• passing a second liquid for accepting ions from said water, through said concentration compartments while said water is passed through said ion depletion compartments,
• applying an electrical voltage between an anode in said anode compartment and a cathode in said cathode compartment, and
• recovering purified water from said depletion compartment.