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Cross flow ultrafiltration is a pressure driven membrane process in which the fluid to be filtered flows parallel to the The formation of filter cake can be reduced by membrane surface. scouring force of the flow, thus better permeate rate is obtained. Laboratory-scale ultrafiltration experiments with Polyvinyl Alcohol (PVA) solution of known molecular weight was carried out the membrane filter performances with respect to to study operating These operating parameters included, parameters. membrane molecular weight cut off size, molecular weight of PVA, influent concentration, cross flow velocity and applied pressure. It was discovered that clogging in the membrane occurs quite and quasi-steady state was slowly during first 30 minutes, In this noticed normally after 50 minutes of filtration time. study, steady state flux data were used to develop semi-empirical and empirical correlations which are useful in the optimum design of ultrafiltration.

The permeate slowly minutes was at the of achieved flux in cross beginning filtration after in most the relative interaction decrease permeate fouling, in and to flow ultrafiltration remained cases.