Effect of biomass retention time on performance and fouling of a stirred membrane photobioreactor.

Dang, B-T; Bui, X-T; Nguyen, T-T; Ngo, HH; Nghiem, LD; Huynh, K-P-H; Vo, T-K-Q; Vo, T-D-H; Lin, C; Chen, S-S

Effect of biomass retention time on performance and fouling of a stirred membrane photobioreactor.

Dang, B-T Bui, X-T Nguyen, T-T Ngo, HH Nghiem, LD Huynh, K-P-H Vo, T-K-Q Vo, T-D-H Lin, C Chen, S-S

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Sci Total Environ, 2023, 864, pp. 161047
Issue Date:: 2023-03-15

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Field	Value	Language
dc.contributor.author	Dang, B-T
dc.contributor.author	Bui, X-T
dc.contributor.author	Nguyen, T-T
dc.contributor.author	Ngo, HH
dc.contributor.author	Nghiem, LD
dc.contributor.author	Huynh, K-P-H
dc.contributor.author	Vo, T-K-Q
dc.contributor.author	Vo, T-D-H
dc.contributor.author	Lin, C
dc.contributor.author	Chen, S-S
dc.date.accessioned	2023-05-05T05:24:20Z
dc.date.available	2022-12-15
dc.date.available	2023-05-05T05:24:20Z
dc.date.issued	2023-03-15
dc.identifier.citation	Sci Total Environ, 2023, 864, pp. 161047
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/170230
dc.description.abstract	Co-culture of microalgae-activated sludge has the potential to purify wastewater while reduce energy demand from aeration. In this work, a mechanically stirred membrane photobioreactor (stirred-MPBR) was used to evaluate the impact of the biomass retention time (BRT) on the treatment performance and membrane fouling. Results showed that stirred-MPBR was affected by BRT during treating domestic wastewater at a flux of 16.5 L m-2 h-1. The highest productivity was attained at BRT 7d (102 mg L-1 d-1), followed by BRT 10d (86 mg L-1 d-1), BRT 5d (85 mg L-1 d-1), and BRT 3d (83 mg L-1 d-1). Statistical analysis results showed that BRT 7d had a higher COD removal rate than BRT 10d, however, there is no difference in total nitrogen removal rate. The highest TP removal occurred when the biomass operated at BRT as short as 3d. Reduced BRTs caused a change in the microalgae-activated sludge biomass fraction that encouraged nitrification activity while simultaneously contributing to a higher fouling rate. The bound protein concentrations dropped from 31.35 mg L-1 (BRT 10d) to 10.67 mg L-1 (BRT 3d), while soluble polysaccharides increased from 0.99 to 1.82 mg L-1, respectively. The concentrations of extracellular polymeric substance fractions were significantly altered, which decreased the mean floc size and contributed to the escalating fouling propensity. At the optimum BRT of 7d, the stirred-MPBR showed sufficient access to light and nutrients exchange for mutualistic interactions between the microalgae and activated sludge.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/DP200100933
dc.relation.ispartof	Sci Total Environ
dc.relation.isbasedon	10.1016/j.scitotenv.2022.161047
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Wastewater
dc.subject.mesh	Photobioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Biomass
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Microalgae
dc.subject.mesh	Nitrogen
dc.subject.mesh	Nitrogen
dc.subject.mesh	Biomass
dc.subject.mesh	Sewage
dc.subject.mesh	Microalgae
dc.subject.mesh	Photobioreactors
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Wastewater
dc.subject.mesh	Wastewater
dc.subject.mesh	Photobioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Biomass
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Microalgae
dc.subject.mesh	Nitrogen
dc.title	Effect of biomass retention time on performance and fouling of a stirred membrane photobioreactor.
dc.type	Journal Article
utslib.citation.volume	864
utslib.location.activity	Netherlands
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	*
dc.date.updated	2023-05-05T05:24:19Z
pubs.publication-status	Published
pubs.volume	864

Abstract:

Co-culture of microalgae-activated sludge has the potential to purify wastewater while reduce energy demand from aeration. In this work, a mechanically stirred membrane photobioreactor (stirred-MPBR) was used to evaluate the impact of the biomass retention time (BRT) on the treatment performance and membrane fouling. Results showed that stirred-MPBR was affected by BRT during treating domestic wastewater at a flux of 16.5 L m-2 h-1. The highest productivity was attained at BRT 7d (102 mg L-1 d-1), followed by BRT 10d (86 mg L-1 d-1), BRT 5d (85 mg L-1 d-1), and BRT 3d (83 mg L-1 d-1). Statistical analysis results showed that BRT 7d had a higher COD removal rate than BRT 10d, however, there is no difference in total nitrogen removal rate. The highest TP removal occurred when the biomass operated at BRT as short as 3d. Reduced BRTs caused a change in the microalgae-activated sludge biomass fraction that encouraged nitrification activity while simultaneously contributing to a higher fouling rate. The bound protein concentrations dropped from 31.35 mg L-1 (BRT 10d) to 10.67 mg L-1 (BRT 3d), while soluble polysaccharides increased from 0.99 to 1.82 mg L-1, respectively. The concentrations of extracellular polymeric substance fractions were significantly altered, which decreased the mean floc size and contributed to the escalating fouling propensity. At the optimum BRT of 7d, the stirred-MPBR showed sufficient access to light and nutrients exchange for mutualistic interactions between the microalgae and activated sludge.

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http://hdl.handle.net/10453/170230