Perpendicular-flow filtration systems

The problems of fouling and concentration polarisation have found some resolution in the process arrangement that causes the feed liquid to flow parallel to the membrane surface, rather than perpendicular to it, so scouring the surface as it moves across, thinning the surface layer and removing deposited material. The consequent cross flow filtration method has been one of the most important equipment developments in the filtration industry, especially w hen coupled w ith the devices that cause the membrane surface to move w ith respect to a closely positioned stationary surface, in rotating or vibrating filter systems. 

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