Percarbonate-strengthened ferrate pretreatment for enhancing short-chain fatty acids production from sewage sludge.

Wang, Y; Zhang, Z; Wang, X; Guo, H; Zhu, T; Ni, B-J; Liu, Y

Percarbonate-strengthened ferrate pretreatment for enhancing short-chain fatty acids production from sewage sludge.

Wang, Y Zhang, Z Wang, X Guo, H Zhu, T Ni, B-J Liu, Y

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Sci Total Environ, 2023, 904, pp. 166771
Issue Date:: 2023-12-15

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Field	Value	Language
dc.contributor.author	Wang, Y
dc.contributor.author	Zhang, Z
dc.contributor.author	Wang, X
dc.contributor.author	Guo, H
dc.contributor.author	Zhu, T
dc.contributor.author	Ni, B-J
dc.contributor.author	Liu, Y
dc.date.accessioned	2024-04-12T09:08:46Z
dc.date.available	2023-08-31
dc.date.available	2024-04-12T09:08:46Z
dc.date.issued	2023-12-15
dc.identifier.citation	Sci Total Environ, 2023, 904, pp. 166771
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/177855
dc.description.abstract	Sewage sludge management poses a pressing environmental challenge, demanding the implementation of sustainable solutions to facilitate resource recovery. Short-chain fatty acids (SCFAs) serve as valuable chemicals and renewable energy sources, underscoring the importance of maximizing their production to achieve sustainable waste management. Therefore, this study proposes a novel and green strategy, i.e., percarbonate-strengthened ferrate pretreatment to enhance SCFAs synthesis from sewage sludge, because percarbonate could activate ferrate oxidation through providing (bi) carbonate and hydrogen peroxide. Results show that percarbonate largely reduces the required ferrate dosage for fermentation improvement, and their combination exhibits obvious synergistic effects on SCFAs accumulation and sludge reduction. Under the optimal pretreatment conditions, SCFAs production is promoted to 3670.2 mg COD/L, representing a remarkable increase of 5512.4 %, 156.0 % or 395.1 % compared to the control, percarbonate alone or ferrate alone, respectively. Mechanism explorations demonstrate that percarbonate-strengthened ferrate pretreatment significantly enhances sludge solubilization, elevates substrate biodegradability, and alters the physiochemical properties of sludge to favor organics fermentation. The synergistic effects on solid organics release and sludge properties can be attributed to the combined mechanisms of enhanced oxidation and alkaline hydrolysis. Further investigations on metabolic pathways reveal that the combination substantially improves key enzyme activities associated with hydrolysis and SCFAs formation, while severely inhibits that of SCFAs consumption. These findings are further supported by the functional genes coding relevant enzymes. Moreover, the combination alters microbial structures and compositions, leading to the screening and enrichment of key microbes that facilitate SCFAs accumulation. This innovative strategy holds significant promise in advancing sewage sludge management towards a more circular and resource-efficient paradigm.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER
dc.relation.ispartof	Sci Total Environ
dc.relation.isbasedon	10.1016/j.scitotenv.2023.166771
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Sewage
dc.subject.mesh	Fermentation
dc.subject.mesh	Carbonates
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Hydrogen-Ion Concentration
dc.subject.mesh	Carbonates
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Sewage
dc.subject.mesh	Fermentation
dc.subject.mesh	Hydrogen-Ion Concentration
dc.subject.mesh	Sewage
dc.subject.mesh	Fermentation
dc.subject.mesh	Carbonates
dc.subject.mesh	Fatty Acids, Volatile
dc.subject.mesh	Hydrogen-Ion Concentration
dc.title	Percarbonate-strengthened ferrate pretreatment for enhancing short-chain fatty acids production from sewage sludge.
dc.type	Journal Article
utslib.citation.volume	904
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	2024-04-12T09:08:44Z
pubs.publication-status	Published
pubs.volume	904

Abstract:

Sewage sludge management poses a pressing environmental challenge, demanding the implementation of sustainable solutions to facilitate resource recovery. Short-chain fatty acids (SCFAs) serve as valuable chemicals and renewable energy sources, underscoring the importance of maximizing their production to achieve sustainable waste management. Therefore, this study proposes a novel and green strategy, i.e., percarbonate-strengthened ferrate pretreatment to enhance SCFAs synthesis from sewage sludge, because percarbonate could activate ferrate oxidation through providing (bi) carbonate and hydrogen peroxide. Results show that percarbonate largely reduces the required ferrate dosage for fermentation improvement, and their combination exhibits obvious synergistic effects on SCFAs accumulation and sludge reduction. Under the optimal pretreatment conditions, SCFAs production is promoted to 3670.2 mg COD/L, representing a remarkable increase of 5512.4 %, 156.0 % or 395.1 % compared to the control, percarbonate alone or ferrate alone, respectively. Mechanism explorations demonstrate that percarbonate-strengthened ferrate pretreatment significantly enhances sludge solubilization, elevates substrate biodegradability, and alters the physiochemical properties of sludge to favor organics fermentation. The synergistic effects on solid organics release and sludge properties can be attributed to the combined mechanisms of enhanced oxidation and alkaline hydrolysis. Further investigations on metabolic pathways reveal that the combination substantially improves key enzyme activities associated with hydrolysis and SCFAs formation, while severely inhibits that of SCFAs consumption. These findings are further supported by the functional genes coding relevant enzymes. Moreover, the combination alters microbial structures and compositions, leading to the screening and enrichment of key microbes that facilitate SCFAs accumulation. This innovative strategy holds significant promise in advancing sewage sludge management towards a more circular and resource-efficient paradigm.

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http://hdl.handle.net/10453/177855