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https://hdl.handle.net/10356/143600
Title: | A novel thin film composite hollow fiber osmotic membrane with one-step prepared dual-layer substrate for sludge thickening | Authors: | Ng, Daniel Yee Fan Wu, Bing Chen, Yunfeng Dong, Zhili Wang, Rong |
Keywords: | Engineering::Civil engineering | Issue Date: | 2019 | Source: | Ng, D. Y. F., Wu, B., Chen, Y., Dong, Z., & Wang, R. (2019). A novel thin film composite hollow fiber osmotic membrane with one-step prepared dual-layer substrate for sludge thickening. Journal of Membrane Science, 575, 98–108. doi:10.1016/j.memsci.2019.01.007 | Journal: | Journal of Membrane Science | Abstract: | Forward osmosis (FO) membranes have received attention as an energy-efficient and low-cost technique in stream concentrating processes. In this work, a novel double-skinned hollow fiber thin film composite (TFC) FO membrane has been successfully fabricated, which consists of a one-step prepared dual layer substrate and a thin inner selective layer formed via interfacial polymerization. The substrate consists of a relatively dense ultrafiltration (UF) outer layer and a porous UF inner layer, both of which were constructed from polyethersulfone (PES) as the substrate material by using dual-layer co-extrusion technique. Compared to the commercial and reported double-skinned FO membranes, the FO membrane developed in this work exhibited a higher permeate flux with humic acid solution as feed. Furthermore, the double-skinned FO membrane was applied in concentrating activated sludge using 0.5 M NaCl as draw solution, and a permeate flux at 5.4 L/m2h was achieved after 5 h operation, which was higher than or comparable to those of the reported FO membranes. Membrane autopsies and foulant analysis suggested that the dense UF skin layer helped to reject greater-sized organic foulants (> 300 Da). This study shed light on the important fabrication features and promising application of the double-skinned hollow fiber TFC FO membrane in sludge concentration. | URI: | https://hdl.handle.net/10356/143600 | ISSN: | 0376-7388 | DOI: | 10.1016/j.memsci.2019.01.007 | Rights: | © 2019 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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A novel thin film composite hollow fiber osmotic membrane with one-step prepared dual-layer substrate for sludge thickening.pdf | 785 kB | Adobe PDF | ![]() View/Open |
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