Abstract
When colloidal solutions containing such materials as protein are separated and concentrated by ultrafiltration, colloidal particles thickened on the filtration membrane become gelatinous and exhibit very high filtration resistance.
Cross-flow electro-ultrafiltration has been developed to remove the bottleneck. The filtration flux is increased because the thickness of the gel layer formed on the membrane is decreased by electrophoresis and by the shear force caused near the membrane. Moreover, the filtration resistances of the gel layer and the membrane are apparently decreased by electroosmosis.
In this paper, a design method for cross-flow electro-ultrafiltration is proposed for the case of gelatin colloidal solution based on the design and experimental equations of filtration flux obtained previously and a design equation confirmed experimentally in this study.
