Optimization of biological enzymes combined with Fe<sup>2+</sup>-activated advanced oxidation process for waste activated sludge conditioning using the response surface method

Kang, X; Li, C; Ding, W; Ma, Y; Zhou, X; Gao, S; Chen, C; Liu, W; He, Z; Li, X; Jiang, G

Optimization of biological enzymes combined with Fe<sup>2+</sup>-activated advanced oxidation process for waste activated sludge conditioning using the response surface method

Kang, X Li, C Ding, W Ma, Y Zhou, X Gao, S Chen, C Liu, W He, Z Li, X

Jiang, G

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Journal of Water Process Engineering, 2023, 53
Issue Date:: 2023-07-01

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Field	Value	Language
dc.contributor.author	Kang, X
dc.contributor.author	Li, C
dc.contributor.author	Ding, W
dc.contributor.author	Ma, Y
dc.contributor.author	Zhou, X
dc.contributor.author	Gao, S
dc.contributor.author	Chen, C
dc.contributor.author	Liu, W
dc.contributor.author	He, Z
dc.contributor.author	Li, X https://orcid.org/0000-0003-1768-9556
dc.contributor.author	Jiang, G
dc.date.accessioned	2024-05-10T03:09:02Z
dc.date.available	2024-05-10T03:09:02Z
dc.date.issued	2023-07-01
dc.identifier.citation	Journal of Water Process Engineering, 2023, 53
dc.identifier.issn	2214-7144
dc.identifier.uri	http://hdl.handle.net/10453/178788
dc.description.abstract	Waste activated sludge (WAS) conditioning is crucial for enhancing sludge dewaterability and effectively reducing the management cost. The feasibility of bio-enzymes with Fe2+-activated advanced oxidation processes (AOPs) for WAS conditioning was investigated in this study. Two representative bio-enzymes, α-amylase and neutral protease, and two typical AOPs, the Fenton system and Fe2+/Ca(ClO)2 system, were chosen. The medical dosages of AOPs were first optimized by single-factor experiments. On this basis, the dosages of bio-enzyme, ferrous ion, and oxidant were optimized using the response surface method (RSM). Results showed that neutral protease combined with the Fe2+/Ca(ClO)2 system performed better in CST and SRF reduction rates while reducing the medical dosages of AOPs. Under the optimal conditions of neutral protease dosage of 20.9 mg/g TSS, Fe2+ dosage of 0.64 mmol/g TSS, and Ca(ClO)2 dosage of 0.54 mmol/g TSS, the reduction in sludge CST and SRF reached 84.81 % and 94.06 %, respectively. The neutral protease with the Fe2+/Ca(ClO)2 system was a potential method for improving sludge dewatering performance.
dc.language	English
dc.publisher	ELSEVIER
dc.relation.ispartof	Journal of Water Process Engineering
dc.relation.isbasedon	10.1016/j.jwpe.2023.103634
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	Optimization of biological enzymes combined with Fe<sup>2+</sup>-activated advanced oxidation process for waste activated sludge conditioning using the response surface method
dc.type	Journal Article
utslib.citation.volume	53
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
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	2024-05-10T03:08:57Z
pubs.publication-status	Published
pubs.volume	53

Abstract:

Waste activated sludge (WAS) conditioning is crucial for enhancing sludge dewaterability and effectively reducing the management cost. The feasibility of bio-enzymes with Fe2+-activated advanced oxidation processes (AOPs) for WAS conditioning was investigated in this study. Two representative bio-enzymes, α-amylase and neutral protease, and two typical AOPs, the Fenton system and Fe2+/Ca(ClO)2 system, were chosen. The medical dosages of AOPs were first optimized by single-factor experiments. On this basis, the dosages of bio-enzyme, ferrous ion, and oxidant were optimized using the response surface method (RSM). Results showed that neutral protease combined with the Fe2+/Ca(ClO)2 system performed better in CST and SRF reduction rates while reducing the medical dosages of AOPs. Under the optimal conditions of neutral protease dosage of 20.9 mg/g TSS, Fe2+ dosage of 0.64 mmol/g TSS, and Ca(ClO)2 dosage of 0.54 mmol/g TSS, the reduction in sludge CST and SRF reached 84.81 % and 94.06 %, respectively. The neutral protease with the Fe2+/Ca(ClO)2 system was a potential method for improving sludge dewatering performance.

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