Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/136798
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dc.contributor.authorLoh, Chun Hengen_US
dc.contributor.authorWu, Bingen_US
dc.contributor.authorGe, Liyaen_US
dc.contributor.authorPan, Chaozhien_US
dc.contributor.authorWang, Rongen_US
dc.date.accessioned2020-01-29T05:16:16Z-
dc.date.available2020-01-29T05:16:16Z-
dc.date.issued2017-
dc.identifier.citationLoh, C. H., Wu, B., Ge, L., Pan, C., & Wang, R. (2018). High-strength N-methyl-2-pyrrolidone-containing process wastewater treatment using sequencing batch reactor and membrane bioreactor : a feasibility study. Chemosphere, 194, 534-542. doi:10.1016/j.chemosphere.2017.12.013en_US
dc.identifier.issn0045-6535en_US
dc.identifier.urihttps://hdl.handle.net/10356/136798-
dc.description.abstractN-methyl-2-pyrrolidone (NMP) is widely used as a solvent in polymeric membrane fabrication process, its elimination from the process wastewater (normally at a high concentration > 1000 mg/L) prior to discharge is essential because of environmental concern. This study investigated the feasibility of treating high-strength NMP-containing process wastewater in a sequencing batch reactor (SBR; i.e., batch feeding and intermittent aerobic/anoxic condition) and a membrane bioreactor (MBR; i.e., continuous feeding and aeration), respectively. The results showed that the SBR with the acclimated sludge was capable of removing >90% of dissolved organic carbon (DOC) and almost 98% of NMP within 2 h. In contrast, the MBR with the acclimated sludge showed a decreasing NMP removal efficiency from 100% to 40% over 15-day operation. The HPLC and LC-MS/MS analytical results showed that NMP degradation in SBR and MBR could undergo different pathways. This may be attributed to the dissimilar bacterial community compositions in the SBR and MBR as identified by 16s rRNA gene sequencing analysis. Interestingly, the NMP-degrading capability of the activated sludge derived from MBR could be recovered to >98% after they were operated at the SBR mode (batch feeding mode with intermittent aerobic/anoxic condition). This study reveals that SBR is probably a more feasible process to treat high-strength NMP-containing wastewater, but residual NMP metabolites in the SBR effluent need to be post-treated by an oxidation or adsorption process in order to achieve zero-discharge of toxic chemicals.en_US
dc.description.sponsorshipEDB (Economic Devt. Board, S’pore)en_US
dc.language.isoenen_US
dc.relation.ispartofChemosphereen_US
dc.rights© 2017 Elsevier Ltd. All rights reserved. This paper was published in Chemosphere and is made available with permission of Elsevier Ltd.en_US
dc.subjectEngineering::Civil engineeringen_US
dc.titleHigh-strength N-methyl-2-pyrrolidone-containing process wastewater treatment using sequencing batch reactor and membrane bioreactor : a feasibility studyen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.organizationAdvanced Environmental Biotechnology Centreen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchResidues and Resource Reclamation Centreen_US
dc.contributor.researchSingapore Membrane Technology Centreen_US
dc.identifier.doi10.1016/j.chemosphere.2017.12.013-
dc.description.versionAccepted versionen_US
dc.identifier.pmid29241127-
dc.identifier.scopus2-s2.0-85037630350-
dc.identifier.volume194en_US
dc.identifier.spage534en_US
dc.identifier.epage542en_US
dc.subject.keywordsN-methyl-2-pyrrolidoneen_US
dc.subject.keywordsBiodegradationen_US
item.fulltextWith Fulltext-
item.grantfulltextopen-
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