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Title: Module scale-up and performance evaluation of thin film composite hollow fiber membranes for pressure retarded osmosis
Authors: Chen, Yunfeng
Loh, Chun Heng
Zhang, Lizhi
Setiawan, Laurentia
She, Qianhong
Fang, Wangxi
Hu, Xiao
Wang, Rong
Keywords: Pressure Retarded Osmosis
Engineering::Civil engineering
Pilot Scale PRO
Issue Date: 2017
Source: 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
Series/Report no.: Journal of Membrane Science
Abstract: 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.
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2017.11.036
Rights: © 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IGS Journal Articles

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