Influence of Inner Configuration of Membrane on Microfiltration of Suspensions

Abstract

The influence of membrane type on the permeate flux in microfiltration of two sorbents Bentonite a natural sorbent, montmorillonite based clay and Lewatit S1468 a synthetic sorbent, styrene-divinylbenzene based copolymer was studied. Two types of membranes, single-and multi-channel, both asymmetric inorganic ceramic membranes based on α-Al2O3, were used. The experimental data were obtained by continuous microfiltration equipment. According to the results use of multi-channel membrane has more advantages higher permeate flux, lower energy consumption, and lower flow rate than disadvantages longer time period to reach the steady state and higher pressure loss.

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).…”

“…There was no significant decrease of the initial permeate flux in measurements with Lewatit S 1468 suspension. The steady permeate flux was reached in approximately the same time as for the single-phase flow (Bakalár et al, 2013a). The permeate flux (Fig.…”

“…A more significant difference was recorded in the permeate flux depending on the flow rate of liquid and gaseous phases. Compared to the single-phase flow (Bakalár et al, 2013a;2013b;2013c) the flux of the permeate achieved the steady state in longer time period but at a higher rate. The increase in two-phase flow was 4 and 5.5% compared to single-phase flow at 1.4 and 2.2 m s −1 of the gaseous phase rate, respectively, for both the experiments without and with adsorbed zinc.…”

“…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).…”

Recent progress and technical improvement strategies for mitigating ceramic membrane bottlenecks in water purification processes: A review

“…Meanwhile, Bouazizi et al 101 fabricated flat disk ceramic membranes using Moroccan bentonite for wastewater treatment, showing a remarkable rejection performance of about 99% and permeated flux of up to 520 L/(m 2 h bar). However, Bakalár et al 102 incorporated αAl 2 O 3 and ZrO 2 in tubular ceramic membranes made from bentonite for MF, achieving high water flux and rejection performance. Eom et al 75 also mixed bentonite with kaolin and talc for oily wastewater treatment, demonstrating a high rejection performance of 96.7% and water flux of 226.8 L/(m 2 h bar).…”