Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis

Pressure retarded osmosis (PRO) demonstrates great potential in energy harvesting when combining with seawater reverse osmosis. However, the lack of suitable membrane modules and the issue caused by the membrane fouling greatly impede the practical application of PRO to a larger scale. In this study...

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Main Authors: Chen, Yunfeng, Loh, Chun Heng, Zhang, Lizhi, Setiawan, Laurentia, She, Qianhong, Fang, Wangxi, Hu, Xiao, Wang, Rong
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2019
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Online Access:https://hdl.handle.net/10356/85165
http://hdl.handle.net/10220/50264
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-851652020-11-01T04:45:41Z Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis Chen, Yunfeng Loh, Chun Heng Zhang, Lizhi Setiawan, Laurentia She, Qianhong Fang, Wangxi Hu, Xiao Wang, Rong School of Civil and Environmental Engineering School of Materials Science & Engineering Interdisciplinary Graduate School (IGS) Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Pressure Retarded Osmosis Engineering::Civil engineering Pilot Scale PRO Pressure retarded osmosis (PRO) demonstrates great potential in energy harvesting when combining with seawater reverse osmosis. However, the lack of suitable membrane modules and the issue caused by the membrane fouling greatly impede the practical application of PRO to a larger scale. In this study, two-inch thin film composite hollow fiber modules were fabricated by using in-house developed PRO membranes. The produced PRO modules have a maximum effective area of 0.5 m2. By assessing the PRO performances of the modules with different sizes, external concentration polarization (ECP) was found to have significant impact on the flux reduction during module scale-up. Different module designs, including fiber bundles, distribution baffles and distribution tubes, were thus adopted as an attempt to boost the membrane performance. A power density of 8.9 W/m2 at 15 bar was obtained using tap water as feed and 1 M NaCl solution as draw solution. PRO performance tests were also carried out using the developed two-inch modules on a pilot-scale setup with actual wastewater retentate as feed solution. Low pressure nanofiltration was selected as the pretreatment of the wastewater retentate to mitigate fouling. A power density of larger than 8 W/m2 was obtained when pretreated wastewater retentate was used as the feed solution, implying high potential of PRO in the pilot scale. Nevertheless, full potential of PRO can only be realized by mitigating ECP, which could be achieved by improving the module design in the further endeavor. NRF (Natl Research Foundation, S’pore) EDB (Economic Devt. Board, S’pore) Accepted version 2019-10-25T04:32:08Z 2019-12-06T15:58:31Z 2019-10-25T04:32:08Z 2019-12-06T15:58:31Z 2017 Journal Article Chen, Y., Loh, C. H., Zhang, L., Setiawan, L., She, Q., Fang, W., . . . Wang, R. (2018). Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis. Journal of Membrane Science, 548, 398-407. doi:10.1016/j.memsci.2017.11.036 0376-7388 https://hdl.handle.net/10356/85165 http://hdl.handle.net/10220/50264 10.1016/j.memsci.2017.11.036 en Journal of Membrane Science © 2017 Elsevier B.V. All rights reserved. This paper was published in Journal of Membrane Science and is made available with permission of Elsevier B.V. 34 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Pressure Retarded Osmosis
Engineering::Civil engineering
Pilot Scale PRO
spellingShingle Pressure Retarded Osmosis
Engineering::Civil engineering
Pilot Scale PRO
Chen, Yunfeng
Loh, Chun Heng
Zhang, Lizhi
Setiawan, Laurentia
She, Qianhong
Fang, Wangxi
Hu, Xiao
Wang, Rong
Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
description Pressure retarded osmosis (PRO) demonstrates great potential in energy harvesting when combining with seawater reverse osmosis. However, the lack of suitable membrane modules and the issue caused by the membrane fouling greatly impede the practical application of PRO to a larger scale. In this study, two-inch thin film composite hollow fiber modules were fabricated by using in-house developed PRO membranes. The produced PRO modules have a maximum effective area of 0.5 m2. By assessing the PRO performances of the modules with different sizes, external concentration polarization (ECP) was found to have significant impact on the flux reduction during module scale-up. Different module designs, including fiber bundles, distribution baffles and distribution tubes, were thus adopted as an attempt to boost the membrane performance. A power density of 8.9 W/m2 at 15 bar was obtained using tap water as feed and 1 M NaCl solution as draw solution. PRO performance tests were also carried out using the developed two-inch modules on a pilot-scale setup with actual wastewater retentate as feed solution. Low pressure nanofiltration was selected as the pretreatment of the wastewater retentate to mitigate fouling. A power density of larger than 8 W/m2 was obtained when pretreated wastewater retentate was used as the feed solution, implying high potential of PRO in the pilot scale. Nevertheless, full potential of PRO can only be realized by mitigating ECP, which could be achieved by improving the module design in the further endeavor.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Chen, Yunfeng
Loh, Chun Heng
Zhang, Lizhi
Setiawan, Laurentia
She, Qianhong
Fang, Wangxi
Hu, Xiao
Wang, Rong
format Article
author Chen, Yunfeng
Loh, Chun Heng
Zhang, Lizhi
Setiawan, Laurentia
She, Qianhong
Fang, Wangxi
Hu, Xiao
Wang, Rong
author_sort Chen, Yunfeng
title Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
title_short Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
title_full Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
title_fullStr Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
title_full_unstemmed Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
title_sort module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
publishDate 2019
url https://hdl.handle.net/10356/85165
http://hdl.handle.net/10220/50264
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