Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance
A pilot gravity-driven microfiltration (GDM) reactor was operated on-site for over 250 days to pretreat seawater for reverse osmosis (RO) desalination. The microbial community analysis indicated that the dominant species in the pilot GDM system (~ 18.6 L/m2 h) were completely different from those in...
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sg-ntu-dr.10356-865562020-09-26T22:00:58Z Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance Wu, Bing Suwarno, Stanislaus Raditya Tan, Hwee Sin Kim, Lan Hee Hochstrasser, Florian Chong, Tzyy Haur Burkhardt, Michael Pronk, Wouter Fane, Anthony Gordon School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Biofouling Assimilable organic carbon A pilot gravity-driven microfiltration (GDM) reactor was operated on-site for over 250 days to pretreat seawater for reverse osmosis (RO) desalination. The microbial community analysis indicated that the dominant species in the pilot GDM system (~ 18.6 L/m2 h) were completely different from those in the other tested GDM systems (~ 2.7–17.2 L/m2 h), operating on the same feed. This was possibly due to the differences in available space for eukaryotic movement, hydraulic retention time (i.e., different organic loadings) or operation time (250 days vs. 25–45 days). Stichotrichia, Copepoda, and Pterygota were predominant eukaryotes at genus level in the pilot GDM. Furthermore, the GDM pretreatment led to a significantly lower RO fouling potential in comparison to the ultrafiltration (UF) system. This was attributed to the fact that GDM filtration produced a permeate with less amount of assimilable organic carbon (AOC) and biopolymers. Accordingly, lower amount of organic foulants (biopolymers and low molecular weight neutrals) and less biofilm formation on the GDM-RO membrane were observed. Although α-proteobacteria were dominant in both RO fouling layers, their bacterial community compositions at genus level were significantly different. Thalassobius had higher abundance in the GDM-RO fouling layers, while Erythrobacter and Hyphomonas were more predominant in the UF-RO fouling layers. EDB (Economic Devt. Board, S’pore) Accepted version 2017-11-21T09:24:37Z 2019-12-06T16:24:39Z 2017-11-21T09:24:37Z 2019-12-06T16:24:39Z 2017 Journal Article Wu, B., Suwarno, S. R., Tan, H. S., Kim, L. H., Hochstrasser, F., Chong, T. H., et al. (2017). Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance. Desalination, 418, 1-8. 0011-9164 https://hdl.handle.net/10356/86556 http://hdl.handle.net/10220/44070 10.1016/j.desal.2017.05.024 en Desalination © 2017 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Desalination, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.desal.2017.05.024]. 32 p. application/pdf |
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Biofouling Assimilable organic carbon |
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Biofouling Assimilable organic carbon Wu, Bing Suwarno, Stanislaus Raditya Tan, Hwee Sin Kim, Lan Hee Hochstrasser, Florian Chong, Tzyy Haur Burkhardt, Michael Pronk, Wouter Fane, Anthony Gordon Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance |
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A pilot gravity-driven microfiltration (GDM) reactor was operated on-site for over 250 days to pretreat seawater for reverse osmosis (RO) desalination. The microbial community analysis indicated that the dominant species in the pilot GDM system (~ 18.6 L/m2 h) were completely different from those in the other tested GDM systems (~ 2.7–17.2 L/m2 h), operating on the same feed. This was possibly due to the differences in available space for eukaryotic movement, hydraulic retention time (i.e., different organic loadings) or operation time (250 days vs. 25–45 days). Stichotrichia, Copepoda, and Pterygota were predominant eukaryotes at genus level in the pilot GDM. Furthermore, the GDM pretreatment led to a significantly lower RO fouling potential in comparison to the ultrafiltration (UF) system. This was attributed to the fact that GDM filtration produced a permeate with less amount of assimilable organic carbon (AOC) and biopolymers. Accordingly, lower amount of organic foulants (biopolymers and low molecular weight neutrals) and less biofilm formation on the GDM-RO membrane were observed. Although α-proteobacteria were dominant in both RO fouling layers, their bacterial community compositions at genus level were significantly different. Thalassobius had higher abundance in the GDM-RO fouling layers, while Erythrobacter and Hyphomonas were more predominant in the UF-RO fouling layers. |
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School of Civil and Environmental Engineering |
author_facet |
School of Civil and Environmental Engineering Wu, Bing Suwarno, Stanislaus Raditya Tan, Hwee Sin Kim, Lan Hee Hochstrasser, Florian Chong, Tzyy Haur Burkhardt, Michael Pronk, Wouter Fane, Anthony Gordon |
format |
Article |
author |
Wu, Bing Suwarno, Stanislaus Raditya Tan, Hwee Sin Kim, Lan Hee Hochstrasser, Florian Chong, Tzyy Haur Burkhardt, Michael Pronk, Wouter Fane, Anthony Gordon |
author_sort |
Wu, Bing |
title |
Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance |
title_short |
Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance |
title_full |
Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance |
title_fullStr |
Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance |
title_full_unstemmed |
Gravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performance |
title_sort |
gravity-driven microfiltration pretreatment for reverse osmosis (ro) seawater desalination: microbial community characterization and ro performance |
publishDate |
2017 |
url |
https://hdl.handle.net/10356/86556 http://hdl.handle.net/10220/44070 |
_version_ |
1681058341783076864 |