dc.contributor.authorWu, Bing
dc.contributor.authorSuwarno, Stanislaus Raditya
dc.contributor.authorTan, Hwee Sin
dc.contributor.authorKim, Lan Hee
dc.contributor.authorHochstrasser, Florian
dc.contributor.authorChong, Tzyy Haur
dc.contributor.authorBurkhardt, Michael
dc.contributor.authorPronk, Wouter
dc.contributor.authorFane, Anthony Gordon
dc.identifier.citationWu, 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.en_US
dc.description.abstractA 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.en_US
dc.description.sponsorshipEDB (Economic Devt. Board, S’pore)en_US
dc.format.extent32 p.en_US
dc.rights© 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].en_US
dc.subjectAssimilable organic carbonen_US
dc.titleGravity-driven microfiltration pretreatment for reverse osmosis (RO) seawater desalination: Microbial community characterization and RO performanceen_US
dc.typeJournal Article
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchSingapore Membrane Technology Centreen_US
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.description.versionAccepted versionen_US

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