Flux Characteristics of Oil Separation from O/W Emulsions using Highly Hydrophilic UF Membrane in Narrow Channel

Abstract

Flux characteristics of oil separation from O/W emulsions using highly hydrophilic polymeric UF membrane has been investigated. The effect of using sub-millimeter filtration channel on both unsteady and steady state permeate flux is evaluated. The timedependent flux characteristics indicated that membrane fouling has proceeded mainly according to the intermediate pore blocking mechanism modified for crossflow filtration. The steady state flux increased initially with the transmembrane pressure (TMP), then reached a plateau at a relatively low TMP of $15 kPa, beyond which a steady operation was achieved, and there were practically no advantages of increasing the TMP. The pressure independent limiting flux increased with increasing the crossflow velocity and was found to scale with the membrane surface shear rate to the power of 0.35. The data were modeled satisfactorily using a dimensionally consistent semi-empirical model with R 2 value of 0.96.

Developments of Blocking Filtration Model in Membrane Filtration

“…Equation (88) has been widely employed in the analysis of the flux decline behaviors in crossflow membrane filtration of a variety of colloids (Todisco et al, 1996;Blanpain and Lalande, 1997;de Barros et al, 2003;Rai et al, 2006;Cassano et al, 2007;Mondal and De, 2009;Vera et al, 2009;Ma et al, 2010;Chang et al, 2011;Daniel et al, 2011;Field and Wu, 2011;Huang et al, 2014). Electric field-assisted membrane filtration in which the particle deposition was restricted due to an external electric field was also investigated on the basis of blocking filtration laws as well as crossflow membrane filtration (Sarkar and De, 2012).…”

Ultrathin cellulose nanosheet membranes for superfast separation of oil-in-water nanoemulsions

“…In this case, the membranes with smaller pores are needed for ultraltration. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Very recently, a series of nanoporous membranes were reported to separate oil-in-water nanoemulsions effectively. For example, a novel polysulfone membrane with an average pore diameter of 3.62 nm exhibits an oil rejection of 78.8% and a ux of 128 l m À2 h À1 bar À1 .…”