Insights into coconut shell incineration bottom ash mediated microbial hydrogen production from waste activated sludge

Wei, W; Shi, X; Wu, L; Ni, BJ

Insights into coconut shell incineration bottom ash mediated microbial hydrogen production from waste activated sludge

Wei, W

Shi, X Wu, L Ni, BJ

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Cleaner Production, 2021, 322, pp. 1-8
Issue Date:: 2021-11-01

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Field	Value	Language
dc.contributor.author	Wei, W https://orcid.org/0000-0001-5613-337X
dc.contributor.author	Shi, X
dc.contributor.author	Wu, L
dc.contributor.author	Ni, BJ
dc.date.accessioned	2022-05-05T01:25:10Z
dc.date.available	2022-05-05T01:25:10Z
dc.date.issued	2021-11-01
dc.identifier.citation	Journal of Cleaner Production, 2021, 322, pp. 1-8
dc.identifier.issn	0959-6526
dc.identifier.issn	0959-6526
dc.identifier.uri	http://hdl.handle.net/10453/157034
dc.description.abstract	Previous studies reported that alkaline anaerobic fermentation was an efficient method for microbial hydrogen production from waste activated sludge (WAS) via inhibiting hydrogen-consuming microorganisms. However, the hydrogen production is still hindered by the low hydrolysis efficiency. This study proposed a new strategy to overcome this barrier by using coconut shell incineration bottom ash as mediator, which is a renewable waste and can be obtained for free from waste-to-electricity facilities. Experiment results showed that coconut shell ash (0.6, 0.9 and 1.2 g/g-Total Solids (TS)) remarkably enhanced microbial hydrogen productions from WAS in alkaline anaerobic fermentation, with the highest output being 3.2 times that without coconut shell ash mediating. Based on process modelling analysis, coconut shell ash promoted hydrogen production rate and potential of WAS by up to 7.9 and 3.0 times, and shortened the lag-phase time from 2.1 days to 0.1 day. A mechanistic study revealed that alkaline condition inhibited methonogenesis and homoacetogenesis processes for hydrogen consumption, and coconut shell ash as mediator enhanced WAS solubilization and hydrolysis that related to hydrogen generation. This was supported by microbial community analysis, which demonstrated that microbial community was changed to be favorable to hydrogen generation. This study provided an integrated waste-control paradigm by waste with more renewable energy production, achieving double benefits in sustainability and economy.
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.2021.129157
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	Insights into coconut shell incineration bottom ash mediated microbial hydrogen production from waste activated sludge
dc.type	Journal Article
utslib.citation.volume	322
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	2022-05-05T01:25:07Z
pubs.publication-status	Published
pubs.volume	322

Abstract:

Previous studies reported that alkaline anaerobic fermentation was an efficient method for microbial hydrogen production from waste activated sludge (WAS) via inhibiting hydrogen-consuming microorganisms. However, the hydrogen production is still hindered by the low hydrolysis efficiency. This study proposed a new strategy to overcome this barrier by using coconut shell incineration bottom ash as mediator, which is a renewable waste and can be obtained for free from waste-to-electricity facilities. Experiment results showed that coconut shell ash (0.6, 0.9 and 1.2 g/g-Total Solids (TS)) remarkably enhanced microbial hydrogen productions from WAS in alkaline anaerobic fermentation, with the highest output being 3.2 times that without coconut shell ash mediating. Based on process modelling analysis, coconut shell ash promoted hydrogen production rate and potential of WAS by up to 7.9 and 3.0 times, and shortened the lag-phase time from 2.1 days to 0.1 day. A mechanistic study revealed that alkaline condition inhibited methonogenesis and homoacetogenesis processes for hydrogen consumption, and coconut shell ash as mediator enhanced WAS solubilization and hydrolysis that related to hydrogen generation. This was supported by microbial community analysis, which demonstrated that microbial community was changed to be favorable to hydrogen generation. This study provided an integrated waste-control paradigm by waste with more renewable energy production, achieving double benefits in sustainability and economy.

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http://hdl.handle.net/10453/157034