Co-electron donors driven medium-chain fatty acids production: Roles of electron donors, reaction kinetics and metabolic pathways.

Wu, S-L; Long, Y; Wei, W; Shi, X; Shen, D; Ni, B-J

Co-electron donors driven medium-chain fatty acids production: Roles of electron donors, reaction kinetics and metabolic pathways.

Wu, S-L Long, Y Wei, W

Shi, X

Shen, D Ni, B-J

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Chemosphere, 2023, 338, pp. 139515
Issue Date:: 2023-10

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Field	Value	Language
dc.contributor.author	Wu, S-L
dc.contributor.author	Long, Y
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Shi, X https://orcid.org/0000-0001-8403-3392
dc.contributor.author	Shen, D
dc.contributor.author	Ni, B-J
dc.date.accessioned	2024-04-11T07:33:59Z
dc.date.available	2023-07-14
dc.date.available	2024-04-11T07:33:59Z
dc.date.issued	2023-10
dc.identifier.citation	Chemosphere, 2023, 338, pp. 139515
dc.identifier.issn	0045-6535
dc.identifier.issn	1879-1298
dc.identifier.uri	http://hdl.handle.net/10453/177763
dc.description.abstract	Energy conversion of waste activated sludge alkaline fermentation liquor (WASAFL) to medium-chain fatty acids (MCFAs) is promising for sludge treatment and carbon recovery. However, the single electron donor (ED) fermentation for MCFAs production has irreparable defects. To resolve the respective shortcomings of single electron donor (ED) and improve the MCFAs production efficiency from WASAFL, a novel biotechnical process utilizing ethanol and lactate as co-EDs within different combination ratios were investigated. The results verified that MCFAs production was highest with ethanol to lactate ratio of 1:3 (6988.54 ± 208.18 mg COD/L), being 1.46 and 1.87 times of that with ethanol and lactate as single ED. The kinetic analysis results confirmed that ethanol to lactate ratio of 1:3 resulted in the highest MCFAs yield and formation rate. The microbial taxa results uncovered that the relative abundance of Sphaerochaeta and Haloimpatiens showed positive correlation with MCFAs production. The metabolic pathway analysis indicated that the ethanol oxidization, lactate oxidization, acrylate pathway, reverse β oxidization and fatty acid biosynthesis pathway might take place in the WASAFL fermentation system, contributing to the WASAFL-to-MCFAs conversion.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/DP220101139
dc.relation	http://purl.org/au-research/grants/arc/DE220100530
dc.relation.ispartof	Chemosphere
dc.relation.isbasedon	10.1016/j.chemosphere.2023.139515
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.classification	Meteorology & Atmospheric Sciences
dc.subject.mesh	Kinetics
dc.subject.mesh	Sewage
dc.subject.mesh	Electrons
dc.subject.mesh	Fatty Acids
dc.subject.mesh	Fermentation
dc.subject.mesh	Ethanol
dc.subject.mesh	Lactic Acid
dc.subject.mesh	Metabolic Networks and Pathways
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Ethanol
dc.subject.mesh	Lactic Acid
dc.subject.mesh	Fatty Acids
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Sewage
dc.subject.mesh	Fermentation
dc.subject.mesh	Kinetics
dc.subject.mesh	Electrons
dc.subject.mesh	Metabolic Networks and Pathways
dc.subject.mesh	Kinetics
dc.subject.mesh	Sewage
dc.subject.mesh	Electrons
dc.subject.mesh	Fatty Acids
dc.subject.mesh	Fermentation
dc.subject.mesh	Ethanol
dc.subject.mesh	Lactic Acid
dc.subject.mesh	Metabolic Networks and Pathways
dc.subject.mesh	Fatty Acids, Volatile
dc.title	Co-electron donors driven medium-chain fatty acids production: Roles of electron donors, reaction kinetics and metabolic pathways.
dc.type	Journal Article
utslib.citation.volume	338
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	*
dc.date.updated	2024-04-11T07:33:57Z
pubs.publication-status	Published
pubs.volume	338

Abstract:

Energy conversion of waste activated sludge alkaline fermentation liquor (WASAFL) to medium-chain fatty acids (MCFAs) is promising for sludge treatment and carbon recovery. However, the single electron donor (ED) fermentation for MCFAs production has irreparable defects. To resolve the respective shortcomings of single electron donor (ED) and improve the MCFAs production efficiency from WASAFL, a novel biotechnical process utilizing ethanol and lactate as co-EDs within different combination ratios were investigated. The results verified that MCFAs production was highest with ethanol to lactate ratio of 1:3 (6988.54 ± 208.18 mg COD/L), being 1.46 and 1.87 times of that with ethanol and lactate as single ED. The kinetic analysis results confirmed that ethanol to lactate ratio of 1:3 resulted in the highest MCFAs yield and formation rate. The microbial taxa results uncovered that the relative abundance of Sphaerochaeta and Haloimpatiens showed positive correlation with MCFAs production. The metabolic pathway analysis indicated that the ethanol oxidization, lactate oxidization, acrylate pathway, reverse β oxidization and fatty acid biosynthesis pathway might take place in the WASAFL fermentation system, contributing to the WASAFL-to-MCFAs conversion.

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http://hdl.handle.net/10453/177763