Understanding oily wastewater treatment via membrane distillation

Membrane distillation (MD) is an emerging green technology, but very few reports are available on its use for treating oily feeds, despite produced water representing a significant source of oily wastewater. Accordingly, this study was targeted at understanding the primary impediments of oily water...

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Main Authors: Han, Le, Tan, Yong Zen, Netke, Tanmay, Fane, Anthony Gordon, Chew, Jia Wei
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2017
Subjects:
Online Access:https://hdl.handle.net/10356/83084
http://hdl.handle.net/10220/44038
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-830842020-03-07T11:35:25Z Understanding oily wastewater treatment via membrane distillation Han, Le Tan, Yong Zen Netke, Tanmay Fane, Anthony Gordon Chew, Jia Wei School of Chemical and Biomedical Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Membrane distillation Surfactant Membrane distillation (MD) is an emerging green technology, but very few reports are available on its use for treating oily feeds, despite produced water representing a significant source of oily wastewater. Accordingly, this study was targeted at understanding the primary impediments of oily water MD by systematically investigating the influence of the key components (namely, oil-in-water emulsion, surfactant and salt) in such feeds. When the feed contained all three components typical in produced water, the MD performance severely deteriorated in terms of permeate flux and quality. Interestingly, for feeds containing oil or SDS or NaCl alone, the MD performance was reasonable, which indicates each component on its own did not impact the MD process significantly. Furthermore, the performance was also reasonable when the feed contained oil and NaCl, and improved when the feed contained oil and SDS. The adverse impact on the MD process was thereby traced to the combined presence of SDS and NaCl. Even in the absence of oil, increasing the concentrations of SDS and NaCl in the feed progressively deteriorated the permeate flux and quality. Therefore, to use MD for treating oily feeds necessitates a pre-treatment step to remove or significantly dilute either the surfactant or the salt. More understanding of the interaction between NaCl and SDS via molecular dynamics simulations would be useful to not only provide information on the interaction strength but also on means to circumvent such issues. MOE (Min. of Education, S’pore) EDB (Economic Devt. Board, S’pore) 2017-11-15T02:46:23Z 2019-12-06T15:11:32Z 2017-11-15T02:46:23Z 2019-12-06T15:11:32Z 2017 2017 Journal Article Han, L., Tan, Y. Z., Netke, T., Fane, A. G., & Chew, J. W. (2017). Understanding oily wastewater treatment via membrane distillation. Journal of Membrane Science, 539, 284-294. 0376-7388 https://hdl.handle.net/10356/83084 http://hdl.handle.net/10220/44038 10.1016/j.memsci.2017.06.012 200282 en Journal of Membrane Science © 2017 Elsevier.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Membrane distillation
Surfactant
spellingShingle Membrane distillation
Surfactant
Han, Le
Tan, Yong Zen
Netke, Tanmay
Fane, Anthony Gordon
Chew, Jia Wei
Understanding oily wastewater treatment via membrane distillation
description Membrane distillation (MD) is an emerging green technology, but very few reports are available on its use for treating oily feeds, despite produced water representing a significant source of oily wastewater. Accordingly, this study was targeted at understanding the primary impediments of oily water MD by systematically investigating the influence of the key components (namely, oil-in-water emulsion, surfactant and salt) in such feeds. When the feed contained all three components typical in produced water, the MD performance severely deteriorated in terms of permeate flux and quality. Interestingly, for feeds containing oil or SDS or NaCl alone, the MD performance was reasonable, which indicates each component on its own did not impact the MD process significantly. Furthermore, the performance was also reasonable when the feed contained oil and NaCl, and improved when the feed contained oil and SDS. The adverse impact on the MD process was thereby traced to the combined presence of SDS and NaCl. Even in the absence of oil, increasing the concentrations of SDS and NaCl in the feed progressively deteriorated the permeate flux and quality. Therefore, to use MD for treating oily feeds necessitates a pre-treatment step to remove or significantly dilute either the surfactant or the salt. More understanding of the interaction between NaCl and SDS via molecular dynamics simulations would be useful to not only provide information on the interaction strength but also on means to circumvent such issues.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Han, Le
Tan, Yong Zen
Netke, Tanmay
Fane, Anthony Gordon
Chew, Jia Wei
format Article
author Han, Le
Tan, Yong Zen
Netke, Tanmay
Fane, Anthony Gordon
Chew, Jia Wei
author_sort Han, Le
title Understanding oily wastewater treatment via membrane distillation
title_short Understanding oily wastewater treatment via membrane distillation
title_full Understanding oily wastewater treatment via membrane distillation
title_fullStr Understanding oily wastewater treatment via membrane distillation
title_full_unstemmed Understanding oily wastewater treatment via membrane distillation
title_sort understanding oily wastewater treatment via membrane distillation
publishDate 2017
url https://hdl.handle.net/10356/83084
http://hdl.handle.net/10220/44038
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