Effect of poly aluminum chloride on dark fermentative hydrogen accumulation from waste activated sludge

Wu, Y; Wang, D; Liu, X; Xu, Q; Chen, Y; Yang, Q; Li, H; Ni, B

Effect of poly aluminum chloride on dark fermentative hydrogen accumulation from waste activated sludge

Wu, Y Wang, D Liu, X Xu, Q Chen, Y Yang, Q Li, H Ni, B

Permalink

Publication Type:: Journal Article
Citation:: Water Research, 2019, 153 pp. 217 - 228
Issue Date:: 2019-04-15

Closed Access

	Filename	Description	Size
	1-s2.0-S0043135419300600-main.pdf	Published Version	2.43 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Wu, Y	en_US
dc.contributor.author	Wang, D	en_US
dc.contributor.author	Liu, X	en_US
dc.contributor.author	Xu, Q	en_US
dc.contributor.author	Chen, Y	en_US
dc.contributor.author	Yang, Q	en_US
dc.contributor.author	Li, H	en_US
dc.contributor.author	Ni, B https://orcid.org/0000-0002-1129-7837	en_US
dc.date.available	2019-01-10	en_US
dc.date.issued	2019-04-15	en_US
dc.identifier.citation	Water Research, 2019, 153 pp. 217 - 228	en_US
dc.identifier.issn	0043-1354	en_US
dc.identifier.uri	http://hdl.handle.net/10453/138674
dc.description.abstract	© 2019 Elsevier Ltd Poly aluminum chloride (PAC), an inorganic coagulant being accumulated in waste activated sludge (WAS) at substantial levels, are generally thought to inhibit WAS anaerobic fermentation. However, its effect on dark fermentative hydrogen accumulation has not been documented. This work therefore aimed to explore its effect on hydrogen accumulation and to elucidate the mechanism of how PAC affects hydrogen accumulation. Experimental results showed that with an increase of PAC addition from 0 to 20 mg Al per gram of total suspended solids (TSS), the maximal hydrogen yield from alkaline fermentation (pH 9.5) increased from 20.9 mL to 27.4 mL per gram volatile suspended solids (VSS) under the standard condition. Further increase of PAC to 30 mg Al/g TSS didn't cause a significant increase of hydrogen yield (p > 0.05). The mechanism explorations revealed that although PAC reduced the total short-chain fatty acid (SCFA) production, this reduction was mainly enforced to propionic acid fermentation type, which did not contribute hydrogen production. PAC suppressed all the microbial processes relevant to anaerobic fermentation to some extents, but its inhibition to hydrogen consumption was much severer than that to hydrogen production. Illumina Miseq sequencing analysis revealed that PAC did not affect the populations of SCFA and hydrogen producers, but the two hydrogen consumers, Acetoanaerobium and Desulfobulbus, were almost washed out by PAC. Among the three types of Al species present in the anaerobic fermentation systems, Ala (monomeric species) significantly affected the maximal hydrogen production potential while Alb (medium polymer species) and Alc (species of sol or gel) posed impacts on hydrogen production rate and the lag time.	en_US
dc.relation.ispartof	Water Research	en_US
dc.relation.isbasedon	10.1016/j.watres.2019.01.016	en_US
dc.subject.classification	Environmental Engineering	en_US
dc.subject.mesh	Hydrogen	en_US
dc.subject.mesh	Fatty Acids, Volatile	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Fermentation	en_US
dc.subject.mesh	Hydrogen-Ion Concentration	en_US
dc.subject.mesh	Aluminum Chloride	en_US
dc.title	Effect of poly aluminum chloride on dark fermentative hydrogen accumulation from waste activated sludge	en_US
dc.type	Journal Article
utslib.citation.volume	153	en_US
utslib.for	0907 Environmental 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	closed_access
pubs.publication-status	Published	en_US
pubs.volume	153	en_US

Abstract:

© 2019 Elsevier Ltd Poly aluminum chloride (PAC), an inorganic coagulant being accumulated in waste activated sludge (WAS) at substantial levels, are generally thought to inhibit WAS anaerobic fermentation. However, its effect on dark fermentative hydrogen accumulation has not been documented. This work therefore aimed to explore its effect on hydrogen accumulation and to elucidate the mechanism of how PAC affects hydrogen accumulation. Experimental results showed that with an increase of PAC addition from 0 to 20 mg Al per gram of total suspended solids (TSS), the maximal hydrogen yield from alkaline fermentation (pH 9.5) increased from 20.9 mL to 27.4 mL per gram volatile suspended solids (VSS) under the standard condition. Further increase of PAC to 30 mg Al/g TSS didn't cause a significant increase of hydrogen yield (p > 0.05). The mechanism explorations revealed that although PAC reduced the total short-chain fatty acid (SCFA) production, this reduction was mainly enforced to propionic acid fermentation type, which did not contribute hydrogen production. PAC suppressed all the microbial processes relevant to anaerobic fermentation to some extents, but its inhibition to hydrogen consumption was much severer than that to hydrogen production. Illumina Miseq sequencing analysis revealed that PAC did not affect the populations of SCFA and hydrogen producers, but the two hydrogen consumers, Acetoanaerobium and Desulfobulbus, were almost washed out by PAC. Among the three types of Al species present in the anaerobic fermentation systems, Ala (monomeric species) significantly affected the maximal hydrogen production potential while Alb (medium polymer species) and Alc (species of sol or gel) posed impacts on hydrogen production rate and the lag time.

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

http://hdl.handle.net/10453/138674