Liquid purification or separation – Electrical insulating or electricity discharging
Reexamination Certificate
2006-02-14
2006-02-14
Drodge, Joseph (Department: 1723)
Liquid purification or separation
Electrical insulating or electricity discharging
C204S633000, C204S637000, C204S638000, C204S640000, C210S266000, C210S283000, C210S284000
Reexamination Certificate
active
06998044
ABSTRACT:
The present invention provides a method and apparatus for purifying effluent wastewater utilizing electrophoretic cross-flow filtration and electrodeionization. The method first comprises filtering the water in a cross-flow direction with a filter membrane (120) in the presence of an electric field that is operative to drive suspended particles away from a surface of the filter membrane (120). The permeate (134) containing dissolved solids is next passed through a mixture (188) of at least one cation-exchange resin and at least one anion-exchange resin disposed between a cation-selective membrane (184) and an anion-selective membrane (181) in the presence of an electric field. The electric field drives cations in the permeate through the cation-selective membrane (184), and drives anions in the permeate through the anion-selective membrane (181), thereby to form deionized water (192). The apparatus includes cell modules adapted to be used in plate-and-frame or radial flow configurations.
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Drodge Joseph
Hey David A.
The BOC Group Inc.
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