Influence of suspension concentration and transmembrane pressure on microfiltration of montmorillonite based suspension

Abstract

The effects of various operating conditions including transmembrane pressure, suspension concentration and crossfl ow velocities for the microfi ltration of micro-sized suspensions were experimentally investigated. The experiments were carried out with suspensions of bentonite particles with particle diameters of 0.5-100 μm using 0.1 μm tubular ceramic membranes. The step by step technique was used to determine the values of the critical fl ux and infl uence of the high frequency backfl ushing was analysed. It was found that the permeate fl ux is signifi cantly depend on the suspension concentration and crossfl ow velocity. High permeate fl uxes were obtained at low concentration 1 g.l −1 and/or at high velocity 2.2 ms −1 .

Influence of Two-Phase Liquid-Gas Flow on Permeate Flux through Ceramic Membranes

“…4). The flux decline of the two-phase flow was not as significant as for the single-phase flow, as presented in a previous study (Bakalár et al, 2013a;Müller et al, 2011).…”

“…The decline of permeate flux and reaching the steady state lasted for a longer time in the microfiltration of Bentonite suspension through multi-channel membrane at two-than in single-phase flow (Bakalár et al, 2013a;Müller et al, 2011); however, the permeate flux was stabilized at a greater value (Fig. 8).…”