Optimizing feedstock organic composition to regulate humification and heavy metal passivation during solid-state anaerobic digestion

Guan, W; Ansari, AJ; Yin, R; Qi, C; Song, X

Optimizing feedstock organic composition to regulate humification and heavy metal passivation during solid-state anaerobic digestion

Guan, W Ansari, AJ Yin, R Qi, C Song, X

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2024, 499
Issue Date:: 2024-11-01

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Field	Value	Language
dc.contributor.author	Guan, W
dc.contributor.author	Ansari, AJ
dc.contributor.author	Yin, R
dc.contributor.author	Qi, C
dc.contributor.author	Song, X
dc.date.accessioned	2025-03-18T04:13:05Z
dc.date.available	2025-03-18T04:13:05Z
dc.date.issued	2024-11-01
dc.identifier.citation	Chemical Engineering Journal, 2024, 499
dc.identifier.issn	1385-8947
dc.identifier.issn	1873-3212
dc.identifier.uri	http://hdl.handle.net/10453/185967
dc.description.abstract	This study uncovered the impacts of feedstock organic composition, comprising proteins, lignocellulose, and lipids, on humification and passivation of heavy metals (HMs) in solid-state anaerobic digestion (SSAD). Mantel tests and partial least squares structural equation modeling (PLS-SEM) results revealed that copper (Cu) and zinc (Zn) passivation predominantly occurred through complexation with humic acid (HA). In contrast, lead (Pb) and chromium (Cr) passivation were pH-dependent as influenced by substrate conditions in SSAD. Increasing protein content in the feedstock facilitated lignocellulose biodegradation to enhance HA formation, and thus augmenting Cu and Zn passivation. Furthermore, the improved biodegradation of organic components elevated the substrate pH, further enhancing Pb and Cr passivation. Such improvement was notable when the protein: lignocellulose: lipid ratio of feedstock was regulated to 4.1:3.7:2.2, which increased HA contents to 35.25% and pH to 9 to enhance the passivation of Cu, Pb, and Cr by 0.48%, 52.0%, and 17.9%, respectively.
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2024.156071
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.subject.classification	4016 Materials engineering
dc.title	Optimizing feedstock organic composition to regulate humification and heavy metal passivation during solid-state anaerobic digestion
dc.type	Journal Article
utslib.citation.volume	499
utslib.for	0904 Chemical Engineering
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/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Technology in Water and Wastewater (CTWW)
utslib.copyright.status	closed_access	*
dc.date.updated	2025-03-18T04:13:03Z
pubs.publication-status	Published
pubs.volume	499

Abstract:

This study uncovered the impacts of feedstock organic composition, comprising proteins, lignocellulose, and lipids, on humification and passivation of heavy metals (HMs) in solid-state anaerobic digestion (SSAD). Mantel tests and partial least squares structural equation modeling (PLS-SEM) results revealed that copper (Cu) and zinc (Zn) passivation predominantly occurred through complexation with humic acid (HA). In contrast, lead (Pb) and chromium (Cr) passivation were pH-dependent as influenced by substrate conditions in SSAD. Increasing protein content in the feedstock facilitated lignocellulose biodegradation to enhance HA formation, and thus augmenting Cu and Zn passivation. Furthermore, the improved biodegradation of organic components elevated the substrate pH, further enhancing Pb and Cr passivation. Such improvement was notable when the protein: lignocellulose: lipid ratio of feedstock was regulated to 4.1:3.7:2.2, which increased HA contents to 35.25% and pH to 9 to enhance the passivation of Cu, Pb, and Cr by 0.48%, 52.0%, and 17.9%, respectively.

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http://hdl.handle.net/10453/185967