The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity

This study examined the behavior of granular activated carbon (GAC) in a hybrid GAC-microfiltration process, which was used to simulate an anaerobic fluidized membrane bioreactor. GAC can exhibit two major beneficial roles in reducing membrane fouling, namely, (1) GAC scours the membranes to limit t...

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Main Authors: Wu, Bing, Wong, Philip Chuen Yung, Fane, Anthony Gordon
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/105035
http://hdl.handle.net/10220/20404
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1050352020-09-26T22:03:18Z The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity Wu, Bing Wong, Philip Chuen Yung Fane, Anthony Gordon School of Civil and Environmental Engineering Singapore Membrane Technology Centre DRNTU::Engineering::Environmental engineering::Water treatment This study examined the behavior of granular activated carbon (GAC) in a hybrid GAC-microfiltration process, which was used to simulate an anaerobic fluidized membrane bioreactor. GAC can exhibit two major beneficial roles in reducing membrane fouling, namely, (1) GAC scours the membranes to limit the cake layer formation and facilitate cake layer removal; (2) GAC tends to absorb potential foulants to reduce the interaction of foulants with the membranes. However, several detrimental effects of GAC on membrane performance were also observed. For example, (1) GAC appeared to release micro- and nanoscaled fine carbon particles, which can form potential foulants. (2) GAC abrasion can induce partial membrane integrity loss, which was proven by membrane permeability increase and microscopic autopsy. Interestingly, it was found that the GAC size had little influence on the scouring-enhanced filtration performance and scouring-induced membrane damage. The properties of the membrane materials were more important in determining the extent of integrity loss of the membrane after GAC abrasion. A membrane with good elongation properties (e.g. polyvinylidene fluoride) and GAC having a suitable size (i.e. less energy consumption) with good stability (i.e. releasing less fine carbon particles) is recommended for the hybrid fluidized GAC-membrane filtration process. Published version 2014-08-26T02:18:44Z 2019-12-06T21:44:51Z 2014-08-26T02:18:44Z 2019-12-06T21:44:51Z 2014 2014 Journal Article Wu, B., Wong, P. C. Y., & Fane, A. G. (2014). The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors: effect on membrane fouling and membrane integrity. Desalination and Water Treatment, 53(6), 1450–1459. https://hdl.handle.net/10356/105035 http://hdl.handle.net/10220/20404 10.1080/19443994.2014.943057 en Desalination and water treatment © 2014 Balaban Desalination Publications. This paper was published in Desalination and Water Treatment and is made available as an electronic reprint (preprint) with permission of Balaban Desalination Publications. The paper can be found at the following official DOI: [http://dx.doi.org/10.1080/19443994.2014.943057]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Engineering::Environmental engineering::Water treatment
spellingShingle DRNTU::Engineering::Environmental engineering::Water treatment
Wu, Bing
Wong, Philip Chuen Yung
Fane, Anthony Gordon
The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
description This study examined the behavior of granular activated carbon (GAC) in a hybrid GAC-microfiltration process, which was used to simulate an anaerobic fluidized membrane bioreactor. GAC can exhibit two major beneficial roles in reducing membrane fouling, namely, (1) GAC scours the membranes to limit the cake layer formation and facilitate cake layer removal; (2) GAC tends to absorb potential foulants to reduce the interaction of foulants with the membranes. However, several detrimental effects of GAC on membrane performance were also observed. For example, (1) GAC appeared to release micro- and nanoscaled fine carbon particles, which can form potential foulants. (2) GAC abrasion can induce partial membrane integrity loss, which was proven by membrane permeability increase and microscopic autopsy. Interestingly, it was found that the GAC size had little influence on the scouring-enhanced filtration performance and scouring-induced membrane damage. The properties of the membrane materials were more important in determining the extent of integrity loss of the membrane after GAC abrasion. A membrane with good elongation properties (e.g. polyvinylidene fluoride) and GAC having a suitable size (i.e. less energy consumption) with good stability (i.e. releasing less fine carbon particles) is recommended for the hybrid fluidized GAC-membrane filtration process.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Wu, Bing
Wong, Philip Chuen Yung
Fane, Anthony Gordon
format Article
author Wu, Bing
Wong, Philip Chuen Yung
Fane, Anthony Gordon
author_sort Wu, Bing
title The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
title_short The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
title_full The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
title_fullStr The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
title_full_unstemmed The potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
title_sort potential roles of granular activated carbon in anaerobic fluidized membrane bioreactors : effect on membrane fouling and membrane integrity
publishDate 2014
url https://hdl.handle.net/10356/105035
http://hdl.handle.net/10220/20404
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