Effect of methane partial pressure on the performance of a membrane biofilm reactor coupling methane-dependent denitrification and anammox

Cai, C; Hu, S; Chen, X; Ni, BJ; Pu, J; Yuan, Z

Effect of methane partial pressure on the performance of a membrane biofilm reactor coupling methane-dependent denitrification and anammox

Cai, C Hu, S Chen, X Ni, BJ

Pu, J Yuan, Z

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Publication Type:: Journal Article
Citation:: Science of the Total Environment, 2018, 639 pp. 278 - 285
Issue Date:: 2018-10-15

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Field	Value	Language
dc.contributor.author	Cai, C	en_US
dc.contributor.author	Hu, S	en_US
dc.contributor.author	Chen, X	en_US
dc.contributor.author	Ni, BJ https://orcid.org/0000-0002-1129-7837	en_US
dc.contributor.author	Pu, J	en_US
dc.contributor.author	Yuan, Z	en_US
dc.date.available	2018-05-13	en_US
dc.date.issued	2018-10-15	en_US
dc.identifier.citation	Science of the Total Environment, 2018, 639 pp. 278 - 285	en_US
dc.identifier.issn	0048-9697	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131723
dc.description.abstract	© 2018 Complete nitrogen removal has recently been demonstrated by integrating anaerobic ammonium oxidation (anammox) and denitrifying anaerobic methane oxidation (DAMO) processes. In this work, the effect of methane partial pressure on the performance of a membrane biofilm reactor (MBfR) consisting of DAMO and anammox microorganisms was evaluated. The activities of DAMO archaea and DAMO bacteria in the biofilm increased significantly with increased methane partial pressure, from 367 ± 9 and 58 ± 22 mg-N L−1d−1 to 580 ± 12 and 222 ± 22 mg-N L−1d−1, respectively, while the activity of anammox bacteria only increased slightly, when the methane partial pressure was elevated from 0.24 to 1.39 atm in the short-term batch tests. The results were supported by a long-term (seven weeks) continuous test, when the methane partial pressure was dropped from 1.39 to 0.78 atm. The methane utilization efficiency was always above 96% during both short-term and long-term tests. Taken together, nitrogen removal rate (especially the nitrate reduction rate by DAMO archaea) and methane utilization efficiency could be maintained at high levels in a broad range of methane partial pressure (0.24–1.39 atm in this study). In addition, a previously established DAMO/anammox biofilm model was used to analyze the experimental data. The observed impacts of methane partial pressure on biofilm activity were well explained by the modeling results. These results suggest that methane partial pressure can potentially be used as a manipulated variable to control reaction rates, ultimately to maintain high nitrogen removal efficiency, according to nitrogen loading rate.	en_US
dc.relation.ispartof	Science of the Total Environment	en_US
dc.relation.isbasedon	10.1016/j.scitotenv.2018.05.164	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Biofilms	en_US
dc.subject.mesh	Nitrogen	en_US
dc.subject.mesh	Methane	en_US
dc.subject.mesh	Bioreactors	en_US
dc.subject.mesh	Waste Disposal, Fluid	en_US
dc.subject.mesh	Anaerobiosis	en_US
dc.subject.mesh	Oxidation-Reduction	en_US
dc.subject.mesh	Partial Pressure	en_US
dc.subject.mesh	Denitrification	en_US
dc.title	Effect of methane partial pressure on the performance of a membrane biofilm reactor coupling methane-dependent denitrification and anammox	en_US
dc.type	Journal Article
utslib.citation.volume	639	en_US
utslib.for	0904 Chemical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	639	en_US

Abstract:

© 2018 Complete nitrogen removal has recently been demonstrated by integrating anaerobic ammonium oxidation (anammox) and denitrifying anaerobic methane oxidation (DAMO) processes. In this work, the effect of methane partial pressure on the performance of a membrane biofilm reactor (MBfR) consisting of DAMO and anammox microorganisms was evaluated. The activities of DAMO archaea and DAMO bacteria in the biofilm increased significantly with increased methane partial pressure, from 367 ± 9 and 58 ± 22 mg-N L−1d−1 to 580 ± 12 and 222 ± 22 mg-N L−1d−1, respectively, while the activity of anammox bacteria only increased slightly, when the methane partial pressure was elevated from 0.24 to 1.39 atm in the short-term batch tests. The results were supported by a long-term (seven weeks) continuous test, when the methane partial pressure was dropped from 1.39 to 0.78 atm. The methane utilization efficiency was always above 96% during both short-term and long-term tests. Taken together, nitrogen removal rate (especially the nitrate reduction rate by DAMO archaea) and methane utilization efficiency could be maintained at high levels in a broad range of methane partial pressure (0.24–1.39 atm in this study). In addition, a previously established DAMO/anammox biofilm model was used to analyze the experimental data. The observed impacts of methane partial pressure on biofilm activity were well explained by the modeling results. These results suggest that methane partial pressure can potentially be used as a manipulated variable to control reaction rates, ultimately to maintain high nitrogen removal efficiency, according to nitrogen loading rate.

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http://hdl.handle.net/10453/131723