Calcium peroxide significantly enhances volatile solids destruction in aerobic sludge digestion through improving sludge biodegradability.

Wang, C; Wei, W; Dai, X; Ni, B-J

Calcium peroxide significantly enhances volatile solids destruction in aerobic sludge digestion through improving sludge biodegradability.

Wang, C Wei, W

Dai, X Ni, B-J

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Bioresour Technol, 2022, 346, pp. 126655
Issue Date:: 2022-02

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Field	Value	Language
dc.contributor.author	Wang, C
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Dai, X
dc.contributor.author	Ni, B-J
dc.date.accessioned	2023-03-20T22:30:41Z
dc.date.available	2021-12-26
dc.date.available	2023-03-20T22:30:41Z
dc.date.issued	2022-02
dc.identifier.citation	Bioresour Technol, 2022, 346, pp. 126655
dc.identifier.issn	0960-8524
dc.identifier.issn	1873-2976
dc.identifier.uri	http://hdl.handle.net/10453/167811
dc.description.abstract	This work put up a novel strategy of applying calcium peroxide (CaO2) in aerobic sludge digestion and provided insights into such system. The degradation percentage of sludge and total inorganic nitrogen production in the digesters with CaO2 at 0.02 g/g-VS-WAS increased by 25.8% and 18.8% of control. CaO2 addition allowed various key microbes related to organics degradation to accumulate in the system. Moreover, the modelling and chemical (i.e., excitation emission matrix (EEM) fluorescence and fourier transformation spectroscopy (FTIR)) analyses revealed that CaO2 addition enhanced sludge biodegradability with more release of biodegradable organics and increased degradation of recalcitrant organics, which can be transformed into biodegradable organics with the action of CaO2. Subsequent transformation test indicated that CaO2 enabled to promote hydrolysis and catabolism of biodegradable substrates in sludge. Further investigations on function mechanism suggested that CaO2 carried on positive action for sludge aerobic digestion mainly through the enhancement by ·OH.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	ELSEVIER SCI LTD
dc.relation	http://purl.org/au-research/grants/arc/FT160100195
dc.relation.ispartof	Bioresour Technol
dc.relation.isbasedon	10.1016/j.biortech.2021.126655
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Biotechnology
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Digestion
dc.subject.mesh	Peroxides
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Peroxides
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Digestion
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Digestion
dc.subject.mesh	Peroxides
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.title	Calcium peroxide significantly enhances volatile solids destruction in aerobic sludge digestion through improving sludge biodegradability.
dc.type	Journal Article
utslib.citation.volume	346
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	2023-03-20T22:30:40Z
pubs.publication-status	Published
pubs.volume	346

Abstract:

This work put up a novel strategy of applying calcium peroxide (CaO2) in aerobic sludge digestion and provided insights into such system. The degradation percentage of sludge and total inorganic nitrogen production in the digesters with CaO2 at 0.02 g/g-VS-WAS increased by 25.8% and 18.8% of control. CaO2 addition allowed various key microbes related to organics degradation to accumulate in the system. Moreover, the modelling and chemical (i.e., excitation emission matrix (EEM) fluorescence and fourier transformation spectroscopy (FTIR)) analyses revealed that CaO2 addition enhanced sludge biodegradability with more release of biodegradable organics and increased degradation of recalcitrant organics, which can be transformed into biodegradable organics with the action of CaO2. Subsequent transformation test indicated that CaO2 enabled to promote hydrolysis and catabolism of biodegradable substrates in sludge. Further investigations on function mechanism suggested that CaO2 carried on positive action for sludge aerobic digestion mainly through the enhancement by ·OH.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/167811