Ultrafiltration and electrodialysis method and apparatus

A - Human Necessities – 23 – C

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204/170, 204/98

A23C 9/144 (2006.01)

Patent

CA 1042837

ABSTRACT OF THE DISCLOSURE This invention relates generally to the fluid purifi- cation arts of ultrafiltration and electrodialysis and in particular to a method and apparatus combining the two art. In accordance with the present specification there is provided a combination ultrafiltration and electrodialysis apparatus characterized in that it comprises an enclosure including means for supporting a plurality of membranes dis- posed in spaced relation to form a plurality of cells within said enclosure, electrode means disposed in spaced relation relative to the sides of said membranes, for supplying an electric field there across, at least a first one of said membranes being selective to ions having one charge and at least a second one of said membranes being selective to ions of an opposite change, and an ultrafiltration membrane disposed between said ion selective membranes to define at least one ultrafiltration cell therebetween with one side of said first one of said membranes and a permeate collecting cell with the second one of said membranes, the other side of said first one of said membranes defining a marginal side of an electrode cell and means for delivering fluid under pressure to at least said ultrafiltration cell.

229426

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