| 摘要 |
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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