Methane production from algae in anaerobic digestion: Role of corncob ash supplementation

Wang, Y; Wei, W; Huang, QS; Ni, BJ

Methane production from algae in anaerobic digestion: Role of corncob ash supplementation

Wang, Y Wei, W

Huang, QS Ni, BJ

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Cleaner Production, 2021, 327, pp. 1-9
Issue Date:: 2021-12-10

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Field	Value	Language
dc.contributor.author	Wang, Y
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Huang, QS
dc.contributor.author	Ni, BJ
dc.date.accessioned	2022-05-10T05:49:02Z
dc.date.available	2022-05-10T05:49:02Z
dc.date.issued	2021-12-10
dc.identifier.citation	Journal of Cleaner Production, 2021, 327, pp. 1-9
dc.identifier.issn	0959-6526
dc.identifier.issn	0959-6526
dc.identifier.uri	http://hdl.handle.net/10453/157208
dc.description.abstract	The recycling and utilization of waste has attracted increasing attention due to the requirement of sustainable development. This study proposed a novel waste reuse technology using crop incineration waste (i.e., corncob ash) as an additive to enhance the methane production from anaerobic digestion of algae. Biochemical methane production tests demonstrated that corncob ash (0.6, 0.9 and 1.2 g/g TS (Total Solids)) enhanced methane production from algae, and the maximal methane production was 75.8 ± 1.2 ml CH4/g VS (Volatile Solids) achieved at 0.6–0.9 g/g TS of corncob ash addition, representing the relative increase of 35–37% compared to that without corncob ash. By monitoring the transformation of metabolic intermediates, corncob ash was confirmed to be beneficial to the solubilization, hydrolysis and methanogenesis processes during anaerobic algae digestion. This was supported by the microbial analysis results that corncob ash enriched the related key microorganisms, e.g., Longilinea sp. and Methanosaeta sp. Moreover, mechanism studies revealed that corncob ash alleviated ammonia inhibition and improved the electron transfer efficiency for methane production, which was probably attributed to the porous structure and high redox characteristics of corncob ash. The anaerobic digestion residue with corncob ash rich in inorganic elements (e.g., potassium, calcium and magnesium) could also be used as a potential agricultural fertilizer for soil. The novel strategy proposed in this study might provide a new paradigm of an integrated waste-control by waste to bring significant economic and environmental benefits to waste disposal.
dc.language	English
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/FT160100195
dc.relation.ispartof	Journal of Cleaner Production
dc.relation.isbasedon	10.1016/j.jclepro.2021.129485
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0907 Environmental Engineering, 0910 Manufacturing Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Environmental Sciences
dc.title	Methane production from algae in anaerobic digestion: Role of corncob ash supplementation
dc.type	Journal Article
utslib.citation.volume	327
utslib.for	0907 Environmental Engineering
utslib.for	0910 Manufacturing Engineering
utslib.for	0915 Interdisciplinary 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	*
pubs.consider-herdc	false
dc.date.updated	2022-05-10T05:48:46Z
pubs.publication-status	Published
pubs.volume	327

Abstract:

The recycling and utilization of waste has attracted increasing attention due to the requirement of sustainable development. This study proposed a novel waste reuse technology using crop incineration waste (i.e., corncob ash) as an additive to enhance the methane production from anaerobic digestion of algae. Biochemical methane production tests demonstrated that corncob ash (0.6, 0.9 and 1.2 g/g TS (Total Solids)) enhanced methane production from algae, and the maximal methane production was 75.8 ± 1.2 ml CH4/g VS (Volatile Solids) achieved at 0.6–0.9 g/g TS of corncob ash addition, representing the relative increase of 35–37% compared to that without corncob ash. By monitoring the transformation of metabolic intermediates, corncob ash was confirmed to be beneficial to the solubilization, hydrolysis and methanogenesis processes during anaerobic algae digestion. This was supported by the microbial analysis results that corncob ash enriched the related key microorganisms, e.g., Longilinea sp. and Methanosaeta sp. Moreover, mechanism studies revealed that corncob ash alleviated ammonia inhibition and improved the electron transfer efficiency for methane production, which was probably attributed to the porous structure and high redox characteristics of corncob ash. The anaerobic digestion residue with corncob ash rich in inorganic elements (e.g., potassium, calcium and magnesium) could also be used as a potential agricultural fertilizer for soil. The novel strategy proposed in this study might provide a new paradigm of an integrated waste-control by waste to bring significant economic and environmental benefits to waste disposal.

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http://hdl.handle.net/10453/157208