Mechanism of sulfate reduction hampered in anaerobic biosystem under the progressive decrease of chemical oxygen demand to sulfate ratios: Long-term performance and key microbial community dynamics

Yao, Y; Shi, K; Li, Y; Wang, J; Cheng, D; Jiang, Q; Gao, Y; Qiao, Y; Zhu, N; Xue, J

Mechanism of sulfate reduction hampered in anaerobic biosystem under the progressive decrease of chemical oxygen demand to sulfate ratios: Long-term performance and key microbial community dynamics

Yao, Y Shi, K Li, Y Wang, J Cheng, D Jiang, Q Gao, Y Qiao, Y Zhu, N Xue, J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Water Process Engineering, 2024, 65, pp. 105782
Issue Date:: 2024-08-01

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Field	Value	Language
dc.contributor.author	Yao, Y
dc.contributor.author	Shi, K
dc.contributor.author	Li, Y
dc.contributor.author	Wang, J
dc.contributor.author	Cheng, D
dc.contributor.author	Jiang, Q
dc.contributor.author	Gao, Y
dc.contributor.author	Qiao, Y
dc.contributor.author	Zhu, N
dc.contributor.author	Xue, J
dc.date.accessioned	2025-03-25T02:29:17Z
dc.date.available	2025-03-25T02:29:17Z
dc.date.issued	2024-08-01
dc.identifier.citation	Journal of Water Process Engineering, 2024, 65, pp. 105782
dc.identifier.issn	2214-7144
dc.identifier.uri	http://hdl.handle.net/10453/186188
dc.description.abstract	The bioprocess of anaerobic sulfate reduction has been noted for its suboptimal performance in conditions of low chemical oxygen demand to sulfate ratio (COD/SO42−). In order to explore the underlying causes for this phenomenon, a comprehensive analysis was conducted to assess the effects of the COD/SO42− on sulfate reduction performance, microbial community evolution, and metabolic pathways. The results showed that the efficiencies of sulfate removal rates were remained at a level of 95 % at a stepwise decrease of COD/SO42− from 1.5 to 0.8, while decreased to about 50 % at a COD/SO42− of 0.3. The Haldane fictitious kinetic module suggested that the sulfate reduction process was suppressed under a COD/SO42− of 0.3. The findings obtained from scanning electron microscopy indicated a reduction in the quantity of microorganisms as the COD/SO42− declined. Desulfobulbus (the major sulfate-reducing bacteria) accounted for up to 14.79 % of total communities with a COD/SO42− of 0.3, under conditions of reduced overall microbial community diversity. The dynamics of major metabolisms and functional genes responsible for sulfate conversion were predicted by PICRUSt, the results showed that the assimilatory sulfate reduction pathway was impeded under COD/SO42− of 0.3, potentially corroborating the sub-par performance of sulfate reduction. This research in-depth elucidated the underlying reasons for the inhibition of low COD/SO42− on sulfate reduction, advancing the applications of biological sulfate removal technology in wastewater industry from basic science.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Water Process Engineering
dc.relation.isbasedon	10.1016/j.jwpe.2024.105782
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4011 Environmental engineering
dc.title	Mechanism of sulfate reduction hampered in anaerobic biosystem under the progressive decrease of chemical oxygen demand to sulfate ratios: Long-term performance and key microbial community dynamics
dc.type	Journal Article
utslib.citation.volume	65
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2025-03-25T02:29:14Z
pubs.publication-status	Published
pubs.volume	65

Abstract:

The bioprocess of anaerobic sulfate reduction has been noted for its suboptimal performance in conditions of low chemical oxygen demand to sulfate ratio (COD/SO42−). In order to explore the underlying causes for this phenomenon, a comprehensive analysis was conducted to assess the effects of the COD/SO42− on sulfate reduction performance, microbial community evolution, and metabolic pathways. The results showed that the efficiencies of sulfate removal rates were remained at a level of 95 % at a stepwise decrease of COD/SO42− from 1.5 to 0.8, while decreased to about 50 % at a COD/SO42− of 0.3. The Haldane fictitious kinetic module suggested that the sulfate reduction process was suppressed under a COD/SO42− of 0.3. The findings obtained from scanning electron microscopy indicated a reduction in the quantity of microorganisms as the COD/SO42− declined. Desulfobulbus (the major sulfate-reducing bacteria) accounted for up to 14.79 % of total communities with a COD/SO42− of 0.3, under conditions of reduced overall microbial community diversity. The dynamics of major metabolisms and functional genes responsible for sulfate conversion were predicted by PICRUSt, the results showed that the assimilatory sulfate reduction pathway was impeded under COD/SO42− of 0.3, potentially corroborating the sub-par performance of sulfate reduction. This research in-depth elucidated the underlying reasons for the inhibition of low COD/SO42− on sulfate reduction, advancing the applications of biological sulfate removal technology in wastewater industry from basic science.

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http://hdl.handle.net/10453/186188