Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151152
Title: Cake formation of bidisperse suspensions in dead-end microfiltration
Authors: Han, Qi
Trinh, Thien An
Chew, Jia Wei
Keywords: Engineering::Environmental engineering
Issue Date: 2019
Source: Han, Q., Trinh, T. A. & Chew, J. W. (2019). Cake formation of bidisperse suspensions in dead-end microfiltration. Journal of Membrane Science, 577, 31-40. https://dx.doi.org/10.1016/j.memsci.2019.01.048
Project: MOE2014-T2-2-074
ARC16/15
2015-T1-001-023
RG7/15
SGP-PROG3-019
Journal: Journal of Membrane Science
Abstract: The evolution of the cake during dead-end microfiltration of different compositions of bidisperse feeds was investigated using network modeling and three-dimensional (3D) optical coherence tomography (OCT) imaging. The foulant particles were latex of two different sizes (namely, 3 and 5 µm) and the membrane was polycarbonate track-etched with nominal diameter of 2 µm. The results from the network model indicate that (i) the deposition of the smaller particles on the non-porous area was reduced by the presence of larger particles, whereas that of the larger particles was not affected by the concentration of the smaller ones; and (ii) monodisperse small particles gave a greater specific cake resistance than monodisperse large particles, and the specific cake resistance of the bidisperse mixture can only be reduced with a sufficient proportion of larger particles. OCT results substantiated the model by revealing that (i) bidisperse feeds tended to form homogeneous cakes, but the presence of a higher concentration of large particles led to heterogeneous cakes; (ii) the presence of a lower concentration of larger particles enhanced clustering, while a higher concentration reduced that; and (iii) in the longer-term filtration, the monodisperse feed of small particles dynamically deposited and detach continuously, while the bidisperse feed with the highest concentration of larger particles exhibited negligible deposition and detachment.
URI: https://hdl.handle.net/10356/151152
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2019.01.048
Rights: © 2019 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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