Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation

The mechanical scouring of membranes induced by fluidized particles is a promising method for mitigating membrane fouling. In order to further improve this technique in terms of scouring efficiency and energy requirement, the goal of the current study is to understand the hydrodynamics of the fluidi...

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Main Authors: Wang, Jingwei, Zamani, Farhad, Fane, Anthony Gordon, Chew, Jia Wei, Cahyadi, Andy, Toh, Jia Yuan, Yang, Shiliang, Wu, Bing, Liu, Yu
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2017
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Online Access:https://hdl.handle.net/10356/85740
http://hdl.handle.net/10220/43809
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-857402020-03-07T11:35:28Z Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation Wang, Jingwei Zamani, Farhad Fane, Anthony Gordon Chew, Jia Wei Cahyadi, Andy Toh, Jia Yuan Yang, Shiliang Wu, Bing Liu, Yu School of Chemical and Biomedical Engineering School of Civil and Environmental Engineering Interdisciplinary Graduate School (IGS) Advanced Environmental Biotechnology Centre (AEBC) Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Liquid–solid Fluidization Microfiltration The mechanical scouring of membranes induced by fluidized particles is a promising method for mitigating membrane fouling. In order to further improve this technique in terms of scouring efficiency and energy requirement, the goal of the current study is to understand the hydrodynamics of the fluidized granular activated carbon (GAC) particles, and correspondingly the relationship between the particle behavioral characteristics and the extent of membrane-fouling mitigation. In this study, the impact of GAC particle diameter (dp), superficial liquid velocity (Ul) and axial position of the membrane (h/H) on particle behavior (namely, particle velocity, concentration and momentum) and membrane fouling was investigated. A high-speed video camera and the ImageJ software were used to characterize particle velocity and concentration, and membrane fouling was characterized by the rate of trans-membrane pressure (TMP) rise. Directly correlating particle behavior with membrane fouling trends shows that higher particle velocities, particle concentration and particle momentum generally all showed a negative correlation with dTMP/dt (i.e., improved fouling control). Of the three characteristics (namely, particle velocity, concentration and momentum), the negative correlation between dTMP/dt and particle momentum was the most pronounced, which suggests that momentum transfer between the GAC particles and the membrane represents a key mechanism effecting the scouring to diminish membrane fouling. Finally, the lack of a strong correlation between dTMP/dt and power input was observed, which indicates that a higher energy expenditure did not guarantee a more effective reduction in membrane fouling. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) EDB (Economic Devt. Board, S’pore) 2017-09-27T07:51:11Z 2019-12-06T16:09:22Z 2017-09-27T07:51:11Z 2019-12-06T16:09:22Z 2016 Journal Article Wang, J., Zamani, F., Cahyadi, A., Toh, J. Y., Yang, S., Wu, B., et al. (2016). Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation. Journal of Membrane Science, 510, 38-49. 0376-7388 https://hdl.handle.net/10356/85740 http://hdl.handle.net/10220/43809 10.1016/j.memsci.2016.03.009 en Journal of Membrane Science © 2016 Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Liquid–solid Fluidization
Microfiltration
spellingShingle Liquid–solid Fluidization
Microfiltration
Wang, Jingwei
Zamani, Farhad
Fane, Anthony Gordon
Chew, Jia Wei
Cahyadi, Andy
Toh, Jia Yuan
Yang, Shiliang
Wu, Bing
Liu, Yu
Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation
description The mechanical scouring of membranes induced by fluidized particles is a promising method for mitigating membrane fouling. In order to further improve this technique in terms of scouring efficiency and energy requirement, the goal of the current study is to understand the hydrodynamics of the fluidized granular activated carbon (GAC) particles, and correspondingly the relationship between the particle behavioral characteristics and the extent of membrane-fouling mitigation. In this study, the impact of GAC particle diameter (dp), superficial liquid velocity (Ul) and axial position of the membrane (h/H) on particle behavior (namely, particle velocity, concentration and momentum) and membrane fouling was investigated. A high-speed video camera and the ImageJ software were used to characterize particle velocity and concentration, and membrane fouling was characterized by the rate of trans-membrane pressure (TMP) rise. Directly correlating particle behavior with membrane fouling trends shows that higher particle velocities, particle concentration and particle momentum generally all showed a negative correlation with dTMP/dt (i.e., improved fouling control). Of the three characteristics (namely, particle velocity, concentration and momentum), the negative correlation between dTMP/dt and particle momentum was the most pronounced, which suggests that momentum transfer between the GAC particles and the membrane represents a key mechanism effecting the scouring to diminish membrane fouling. Finally, the lack of a strong correlation between dTMP/dt and power input was observed, which indicates that a higher energy expenditure did not guarantee a more effective reduction in membrane fouling.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Wang, Jingwei
Zamani, Farhad
Fane, Anthony Gordon
Chew, Jia Wei
Cahyadi, Andy
Toh, Jia Yuan
Yang, Shiliang
Wu, Bing
Liu, Yu
format Article
author Wang, Jingwei
Zamani, Farhad
Fane, Anthony Gordon
Chew, Jia Wei
Cahyadi, Andy
Toh, Jia Yuan
Yang, Shiliang
Wu, Bing
Liu, Yu
author_sort Wang, Jingwei
title Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation
title_short Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation
title_full Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation
title_fullStr Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation
title_full_unstemmed Correlating the hydrodynamics of fluidized granular activated carbon (GAC) with membrane-fouling mitigation
title_sort correlating the hydrodynamics of fluidized granular activated carbon (gac) with membrane-fouling mitigation
publishDate 2017
url https://hdl.handle.net/10356/85740
http://hdl.handle.net/10220/43809
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