Enhanced sludge dewaterability by ferrate/ferric chloride: The key role of Fe(IV) on the changes of EPS properties.

Lin, W; Guo, J; Zeng, J; Chen, R; Ngo, HH; Nan, J; Li, G; Ma, J; Ding, A

Enhanced sludge dewaterability by ferrate/ferric chloride: The key role of Fe(IV) on the changes of EPS properties.

Lin, W Guo, J Zeng, J Chen, R Ngo, HH Nan, J Li, G Ma, J Ding, A

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Sci Total Environ, 2023, 858, (Pt 1), pp. 159562
Issue Date:: 2023-02-01

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Field	Value	Language
dc.contributor.author	Lin, W
dc.contributor.author	Guo, J
dc.contributor.author	Zeng, J
dc.contributor.author	Chen, R
dc.contributor.author	Ngo, HH
dc.contributor.author	Nan, J
dc.contributor.author	Li, G
dc.contributor.author	Ma, J
dc.contributor.author	Ding, A
dc.date.accessioned	2024-01-30T04:34:07Z
dc.date.available	2022-10-15
dc.date.available	2024-01-30T04:34:07Z
dc.date.issued	2023-02-01
dc.identifier.citation	Sci Total Environ, 2023, 858, (Pt 1), pp. 159562
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/175070
dc.description.abstract	The complex characteristics of extracellular polymeric substances (EPS) seriously affect the improvement of sludge dewaterability. Ferrate (Fe(VI))/ferric chloride (Fe(III)) was applied through its strong oxidability to effectively enhance sludge dewaterablity by changing the properties of EPS in this study. Results confirmed that water content (WC), specific resistance to filtration (SRF) and capillary suction time (CST) fell from 82.8 %, 9.3 × 1010 s2/g and 35.1 s to 76.1 %, 2.6 × 1010 s2/g and 16.2 s, respectively, when adding 12 mg Fe(VI)/g VSS and 12 mg Fe(III)/g VSS with the dosing interval of 5 min. Investigations of the mechanism strongly suggested that Fe(VI) was successfully catalyzed by Fe(III), promoting the generation of methyl phenyl sulfone (PMSO2) and facilitating the electron transfer, with Fe(IV) having the major role in the oxidation process. Furthermore, sludge water-holding capacity and hydrophilicity waned after oxidation due to the destruction of EPS structure, which promoted the decrement of bound water to enhance the discharge of sludge water, so as to improve the efficiency of dewatering.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation.ispartof	Sci Total Environ
dc.relation.isbasedon	10.1016/j.scitotenv.2022.159562
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Sewage
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Ferric Compounds
dc.subject.mesh	Water
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Water
dc.subject.mesh	Ferric Compounds
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Sewage
dc.subject.mesh	Extracellular Polymeric Substance Matrix
dc.subject.mesh	Ferric Compounds
dc.subject.mesh	Water
dc.subject.mesh	Oxidation-Reduction
dc.subject.mesh	Waste Disposal, Fluid
dc.title	Enhanced sludge dewaterability by ferrate/ferric chloride: The key role of Fe(IV) on the changes of EPS properties.
dc.type	Journal Article
utslib.citation.volume	858
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	2024-01-30T04:34:06Z
pubs.issue	Pt 1
pubs.publication-status	Published
pubs.volume	858
utslib.citation.issue	Pt 1

Abstract:

The complex characteristics of extracellular polymeric substances (EPS) seriously affect the improvement of sludge dewaterability. Ferrate (Fe(VI))/ferric chloride (Fe(III)) was applied through its strong oxidability to effectively enhance sludge dewaterablity by changing the properties of EPS in this study. Results confirmed that water content (WC), specific resistance to filtration (SRF) and capillary suction time (CST) fell from 82.8 %, 9.3 × 1010 s2/g and 35.1 s to 76.1 %, 2.6 × 1010 s2/g and 16.2 s, respectively, when adding 12 mg Fe(VI)/g VSS and 12 mg Fe(III)/g VSS with the dosing interval of 5 min. Investigations of the mechanism strongly suggested that Fe(VI) was successfully catalyzed by Fe(III), promoting the generation of methyl phenyl sulfone (PMSO2) and facilitating the electron transfer, with Fe(IV) having the major role in the oxidation process. Furthermore, sludge water-holding capacity and hydrophilicity waned after oxidation due to the destruction of EPS structure, which promoted the decrement of bound water to enhance the discharge of sludge water, so as to improve the efficiency of dewatering.

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http://hdl.handle.net/10453/175070