Hydrogen production from acidogenic food waste fermentation using untreated inoculum: Effect of substrate concentrations

Pu, Y; Tang, J; Wang, XC; Hu, Y; Huang, J; Zeng, Y; Ngo, HH; Li, Y

Hydrogen production from acidogenic food waste fermentation using untreated inoculum: Effect of substrate concentrations

Pu, Y Tang, J Wang, XC Hu, Y Huang, J Zeng, Y Ngo, HH

Li, Y

Permalink

Publication Type:: Journal Article
Citation:: International Journal of Hydrogen Energy, 2019, 44 (50), pp. 27272 - 27284
Issue Date:: 2019-10-18

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

The embargo period expires on 18 Oct 2021

Adobe PDF

Download Accepted Manuscript VersionAdobe PDF (783.21 kB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Pu, Y	en_US
dc.contributor.author	Tang, J	en_US
dc.contributor.author	Wang, XC	en_US
dc.contributor.author	Hu, Y	en_US
dc.contributor.author	Huang, J	en_US
dc.contributor.author	Zeng, Y	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Li, Y	en_US
dc.date.issued	2019-10-18	en_US
dc.identifier.citation	International Journal of Hydrogen Energy, 2019, 44 (50), pp. 27272 - 27284	en_US
dc.identifier.issn	0360-3199	en_US
dc.identifier.uri	http://hdl.handle.net/10453/137246
dc.description.abstract	© 2019 Hydrogen Energy Publications LLC The effect of substrate concentrations (0, 7.5, 15, 22.5, 30, and 37.5 g-VS/L) on hydrogen production from heat-treated and fresh food waste (FW) using untreated inoculums was investigated in this work. The highest hydrogen yield (75.3 mL/g-VS) was obtained with heat-treated FW at 15 g-VS/L. Lower substrate content could not provide enough organic matter for hydrogen fermentation, while higher substrate concentrations shifted the metabolic pathways from hydrogen fermentation to lactic acid fermentation by enriching the lactic acid bacteria (LAB), which lowered the slurry pH and decreased enzyme activity, resulting in a lower chemical oxygen demand (COD), volatile solid (VS), carbohydrate removal rate, and hydrogen yield. Compared with fresh FW, heat-treated FW is preferred for biohydrogen process with acetate as the main organic product. Additionally, at the optimal concentration (15 g-VS/L) using fresh FW, lactic acid is first accumulated and then degraded to produce hydrogen with butyrate as the main metabolite.	en_US
dc.relation.ispartof	International Journal of Hydrogen Energy	en_US
dc.relation.isbasedon	10.1016/j.ijhydene.2019.08.230	en_US
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Energy	en_US
dc.title	Hydrogen production from acidogenic food waste fermentation using untreated inoculum: Effect of substrate concentrations	en_US
dc.type	Journal Article
utslib.citation.volume	50	en_US
utslib.citation.volume	44	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
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	open_access	*
utslib.copyright.embargo	2021-10-18T00:00:00+1100
pubs.issue	50	en_US
pubs.publication-status	Published	en_US
pubs.volume	44	en_US

Abstract:

© 2019 Hydrogen Energy Publications LLC The effect of substrate concentrations (0, 7.5, 15, 22.5, 30, and 37.5 g-VS/L) on hydrogen production from heat-treated and fresh food waste (FW) using untreated inoculums was investigated in this work. The highest hydrogen yield (75.3 mL/g-VS) was obtained with heat-treated FW at 15 g-VS/L. Lower substrate content could not provide enough organic matter for hydrogen fermentation, while higher substrate concentrations shifted the metabolic pathways from hydrogen fermentation to lactic acid fermentation by enriching the lactic acid bacteria (LAB), which lowered the slurry pH and decreased enzyme activity, resulting in a lower chemical oxygen demand (COD), volatile solid (VS), carbohydrate removal rate, and hydrogen yield. Compared with fresh FW, heat-treated FW is preferred for biohydrogen process with acetate as the main organic product. Additionally, at the optimal concentration (15 g-VS/L) using fresh FW, lactic acid is first accumulated and then degraded to produce hydrogen with butyrate as the main metabolite.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/137246