Improving the treatment of waste activated sludge using calcium peroxide.

Xu, Q; Huang, Q-S; Wei, W; Sun, J; Dai, X; Ni, B-J

Improving the treatment of waste activated sludge using calcium peroxide.

Xu, Q Huang, Q-S Wei, W Sun, J Dai, X Ni, B-J

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Water research, 2020, 187, pp. 116440
Issue Date:: 2020-09-21

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Field	Value	Language
dc.contributor.author	Xu, Q
dc.contributor.author	Huang, Q-S
dc.contributor.author	Wei, W
dc.contributor.author	Sun, J
dc.contributor.author	Dai, X
dc.contributor.author	Ni, B-J
dc.date.accessioned	2021-02-13T19:50:05Z
dc.date.available	2020-09-19
dc.date.available	2021-02-13T19:50:05Z
dc.date.issued	2020-09-21
dc.identifier.citation	Water research, 2020, 187, pp. 116440
dc.identifier.issn	0043-1354
dc.identifier.issn	1879-2448
dc.identifier.uri	http://hdl.handle.net/10453/146070
dc.description.abstract	The treatment and disposal of waste activated sludge (WAS) has become one of the major challenges for the wastewater treatment plants (WWTPs) due to large output, high treatment costs and enriched substantial emerging contaminants (ECs). Therefore, reducing sludge volume, recovering energy and resource from WAS, and removing ECs and decreasing environmental risk have gained increasing attentions. Calcium peroxide (CaO<sub>2</sub>), a versatile and safe peroxide, has been widely applied in terms of WAS treatment including sludge dewatering, anaerobic sludge digestion and anaerobic sludge fermentation due to its specific properties such as generating free radicals and alkali, etc., providing supports for sludge reduction, recycling, and risk mitigation. This review outlines comprehensively the recent progresses and breakthroughs of CaO<sub>2</sub> in the fields of sludge treatment. In particular, the relevant mechanisms of CaO<sub>2</sub> enhancing WAS dewaterability, methane production from anaerobic digestion, short-chain fatty acids (SCFA) and hydrogen production from anaerobic fermentation, and the removal of ECs in WAS and role of experiment parameters are systematically elucidated and discussed, respectively. Finally, the knowledge gaps and opportunities in CaO<sub>2</sub>-based sludge treatment technologies that need to be focused in the future are prospected. The review presented can supply a theoretical basis and technical reference for the application of CaO<sub>2</sub> for improving the treatment of WAS.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Water research
dc.relation.isbasedon	10.1016/j.watres.2020.116440
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Engineering
dc.title	Improving the treatment of waste activated sludge using calcium peroxide.
dc.type	Journal Article
utslib.citation.volume	187
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-02-13T19:49:40Z
pubs.publication-status	Published
pubs.volume	187

Abstract:

The treatment and disposal of waste activated sludge (WAS) has become one of the major challenges for the wastewater treatment plants (WWTPs) due to large output, high treatment costs and enriched substantial emerging contaminants (ECs). Therefore, reducing sludge volume, recovering energy and resource from WAS, and removing ECs and decreasing environmental risk have gained increasing attentions. Calcium peroxide (CaO₂), a versatile and safe peroxide, has been widely applied in terms of WAS treatment including sludge dewatering, anaerobic sludge digestion and anaerobic sludge fermentation due to its specific properties such as generating free radicals and alkali, etc., providing supports for sludge reduction, recycling, and risk mitigation. This review outlines comprehensively the recent progresses and breakthroughs of CaO₂ in the fields of sludge treatment. In particular, the relevant mechanisms of CaO₂ enhancing WAS dewaterability, methane production from anaerobic digestion, short-chain fatty acids (SCFA) and hydrogen production from anaerobic fermentation, and the removal of ECs in WAS and role of experiment parameters are systematically elucidated and discussed, respectively. Finally, the knowledge gaps and opportunities in CaO₂-based sludge treatment technologies that need to be focused in the future are prospected. The review presented can supply a theoretical basis and technical reference for the application of CaO₂ for improving the treatment of WAS.

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http://hdl.handle.net/10453/146070