INTRODUCTIOPS

SummaryThe application of corrugations as turbulence promoters in membrane filtration was studied. This study showed that it is possible to deform an originally flat membrane to a corrugated shape without damaging it. In hyperfiltration experiments using corrugated cellulose acetate membranes it was found that the corrugations improve mass transfer, provided they are not too close together. At a given value of the mass-transfer coefficient, the presence of corrugations can lead to lower energy consumption in hyperfiltration than possible with flat membranes.

SummaryThe application of corrugations as turbulence promoters in membrane filtration was studied.In ultrafiltration experiments with polysulfone membranes using Dextran T70 as solute, it was found that the corrugations result in reduced energy consumption or pressure drop compared with flat membranes at a given value of the flux through the membrane. There appears to be an optimal mutual distance between the corrugations.

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