Model predicted N2O production from membrane-aerated biofilm reactor is greatly affected by biofilm property settings.

Chen, X; Huo, P; Liu, J; Li, F; Yang, L; Li, X; Wei, W; Liu, Y; Ni, B-J

Model predicted N2O production from membrane-aerated biofilm reactor is greatly affected by biofilm property settings.

Chen, X Huo, P Liu, J Li, F Yang, L Li, X Wei, W

Liu, Y

Ni, B-J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Chemosphere, 2021, 281, pp. 1-7
Issue Date:: 2021-10

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Field	Value	Language
dc.contributor.author	Chen, X
dc.contributor.author	Huo, P
dc.contributor.author	Liu, J
dc.contributor.author	Li, F
dc.contributor.author	Yang, L
dc.contributor.author	Li, X
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961
dc.contributor.author	Ni, B-J
dc.date.accessioned	2022-05-10T06:05:31Z
dc.date.available	2021-05-08
dc.date.available	2022-05-10T06:05:31Z
dc.date.issued	2021-10
dc.identifier.citation	Chemosphere, 2021, 281, pp. 1-7
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/157210
dc.description.abstract	Even though modeling has been frequently used to understand the autotrophic deammonification-based membrane-aerated biofilm reactor (MABR), the relationships between system-specific biofilm property settings and model predicted N2O production have yet to be clarified. To this end, this study investigated the impacts of 4 key biofilm property settings (i.e., biofilm thickness/compactness, boundary layer thickness, diffusivity of soluble components in the biofilm structure, and biofilm discretization) on one-dimensional modeling of the MABR, with the focus on its N2O production. The results showed that biofilm thickness/compactness (200-1000 μm), diffusivity of soluble components in the biofilm structure (reduction factor of diffusivity: 0.2-0.9), and biofilm discretization (12-28 grid points) significantly influenced the simulated N2O production, while boundary layer thickness (0-300 μm) only played a marginal role. In the studied ranges of biofilm property settings, distinct upper and lower bounds of N2O production factor (i.e., the percentage ratio of N2O formed to NH4+ removed, 5.5% versus 2.3%) could be predicted. In addition to the microbial community structure, the N2O production pathway contribution differentiation was also subject to changes in biofilm property settings. Therefore, biofilm properties need to be quantified experimentally or set properly to model N2O production from the MABR correctly. As a good practice for one-dimensional modeling of N2O production from biofilm-based reactors, especially the MABR performing autotrophic deammonification, the essential information about those influential biofilm property settings identified in this study should be disclosed and clearly documented, thus ensuring both the reproducibility of modeling results and the reliable applications of N2O models.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/FT160100195
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2021.130861
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.mesh	Biofilms
dc.subject.mesh	Bioreactors
dc.subject.mesh	Membranes
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Reproducibility of Results
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Biofilms
dc.subject.mesh	Bioreactors
dc.subject.mesh	Membranes
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Reproducibility of Results
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Membranes
dc.subject.mesh	Biofilms
dc.subject.mesh	Nitrous Oxide
dc.subject.mesh	Reproducibility of Results
dc.subject.mesh	Bioreactors
dc.subject.mesh	Waste Disposal, Fluid
dc.title	Model predicted N2O production from membrane-aerated biofilm reactor is greatly affected by biofilm property settings.
dc.type	Journal Article
utslib.citation.volume	281
utslib.location.activity	England
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.consider-herdc	false
dc.date.updated	2022-05-10T06:05:23Z
pubs.publication-status	Published
pubs.volume	281

Abstract:

Even though modeling has been frequently used to understand the autotrophic deammonification-based membrane-aerated biofilm reactor (MABR), the relationships between system-specific biofilm property settings and model predicted N2O production have yet to be clarified. To this end, this study investigated the impacts of 4 key biofilm property settings (i.e., biofilm thickness/compactness, boundary layer thickness, diffusivity of soluble components in the biofilm structure, and biofilm discretization) on one-dimensional modeling of the MABR, with the focus on its N2O production. The results showed that biofilm thickness/compactness (200-1000 μm), diffusivity of soluble components in the biofilm structure (reduction factor of diffusivity: 0.2-0.9), and biofilm discretization (12-28 grid points) significantly influenced the simulated N2O production, while boundary layer thickness (0-300 μm) only played a marginal role. In the studied ranges of biofilm property settings, distinct upper and lower bounds of N2O production factor (i.e., the percentage ratio of N2O formed to NH4+ removed, 5.5% versus 2.3%) could be predicted. In addition to the microbial community structure, the N2O production pathway contribution differentiation was also subject to changes in biofilm property settings. Therefore, biofilm properties need to be quantified experimentally or set properly to model N2O production from the MABR correctly. As a good practice for one-dimensional modeling of N2O production from biofilm-based reactors, especially the MABR performing autotrophic deammonification, the essential information about those influential biofilm property settings identified in this study should be disclosed and clearly documented, thus ensuring both the reproducibility of modeling results and the reliable applications of N2O models.

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http://hdl.handle.net/10453/157210