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CRITICAL AND LIMITING FLUXES IN ULTRAFILTRATION USING A POROUS POLYMERIC TUBULAR MEMBRANE

Volume 3, Issue 3, 2012, pp. 283-288
DOI: 10.1615/SpecialTopicsRevPorousMedia.v3.i3.100
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ABSTRACT

A new procedure for calculating the critical flux was presented. Both the critical and limiting fluxes depend on the crossflow velocity and the bulk concentration. For bulk concentrations near the critical concentration, the critical flux can be estimated directly. However, for bulk concentrations beyond the critical value, the critical flux value depends strongly on the concentration polarization. The permeate fluxes increase linearly with TMP for every velocity, which then level off to a stationary flux value. The constant flux obtained shows increments with increasing velocity.

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