Abstract: A method and system combining filtration and ion-exchange structures for removing contaminants from liquids. In overall concept, contaminated liquid is passed through filtering mediums to remove particulate matter from the incoming contaminated liquid. Organics are removed from the liquid by passage through adsorbent non-ionic type resins. The liquid is then passed through strong acid cation exchange resins, weak base anion exchange resins, weak acid cation exchange resins, and strong base anion exchange resins arranged in a predetermined location in the liquid flow path to provide optimized contaminant removal. One of the optimization techniques is through the pH adjustment of the liquid at predetermined points in the flow path. Additionally, the liquid to be purified is passed through mixed bed polisher resins as well as chelation resins to provide a final substantially contaminant free liquid which is returned to use in a closed loop fashion.

Abstract: A modular container which includes a housing frame containing particulate material through which contaminated liquid is passed for purposes of purification. The container includes flow distribution members which are secured within the housing frame for dispersing flow of the incoming contaminated liquid equally throughout the particulate material. Containment members formed of a fibrous material are bonded to the flow distribution members to constrain the particulate material within the housing frame. The containment members are porous to permit passage of the liquid therethrough but of sufficient density to retain the particulate material within a chamber of the housing frame. Upper and lower cover members are hermetically sealed to the housing frame and include conduits to permit insertion of contaminated liquid and egress of purified liquid after it has passed through the particulate material.