Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.seppur.2008.10.019
Title: Membrane fouling in a submerged membrane bioreactor using track-etched and phase-inversed porous membranes
Authors: Choi, J.-H. 
Park, S.-K. 
Ng, H.-Y. 
Keywords: Extracellular polymeric substances
Membrane bioreactor
Membrane fouling
Organic removal
Track-etched membrane
Issue Date: 23-Feb-2009
Source: Choi, J.-H.,Park, S.-K.,Ng, H.-Y. (2009-02-23). Membrane fouling in a submerged membrane bioreactor using track-etched and phase-inversed porous membranes. Separation and Purification Technology 65 (2) : 184-192. ScholarBank@NUS Repository. https://doi.org/10.1016/j.seppur.2008.10.019
Abstract: This study evaluated the impact of membrane characteristics on membrane fouling in a submerged membrane bioreactor (MBR) treating municipal wastewater. Three types of microfiltration membranes with similar pore size of 0.1 μm but different materials and pore microstructures - polyester (PETE), polycarbonate (PCTE) and polytetrafluoroethylene (PTFE) - were used. For track-etched membranes, the PETE membrane, which has the lowest pure water permeability (PWP), exhibited more rapid increase of filtration resistance than the PCTE membrane, which has the intermediate PWP, indicating the significance of membrane porosity in MBR fouling. The PTFE membrane, which has interwoven sponge-like microstructure and highest PWP, showed more rapid resistance increase compared to the PCTE track-etched membrane. This was likely due to the rougher surface of the PTFE membrane, which enhanced foulant adhesion. The trends of the filtration resistance of all the membranes gradually appeared similar after they were cleaned physically and chemically, suggesting that chemical cleaning affected MBR fouling in subsequent operation. Sludge characteristics, including sludge concentration, surface charge and hydrophobicity, did not show direct relationship with fouling rate in this study. Surface charge of the PETE membrane and its foulants layer could contribute to a lower zeta potential of the membrane permeate. It was not clearly shown that membrane hydrophobicity was a significant factor in the membrane fouling during a long-term MBR operation. Gradual increase of protein/carbohydrate ratio in bound extracellular polymeric substances was likely to contribute to the increasing fouling propensity of the membranes tested after membrane cleaning. © 2008 Elsevier B.V. All rights reserved.
Source Title: Separation and Purification Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/67665
ISSN: 13835866
DOI: 10.1016/j.seppur.2008.10.019
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

22
checked on Dec 5, 2017

WEB OF SCIENCETM
Citations

22
checked on Oct 31, 2017

Page view(s)

39
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.