Urine pretreatment significantly promotes methane production in anaerobic waste activated sludge digestion.

Liu, H; Li, X; Zhang, Z; Nghiem, LD; Wang, Q

Urine pretreatment significantly promotes methane production in anaerobic waste activated sludge digestion.

Liu, H Li, X

Zhang, Z Nghiem, LD Wang, Q

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Science of the Total Environment, 2022, 853, pp. 158684-158684
Issue Date:: 2022-12-20

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Field	Value	Language
dc.contributor.author	Liu, H
dc.contributor.author	Li, X https://orcid.org/0000-0003-1768-9556
dc.contributor.author	Zhang, Z
dc.contributor.author	Nghiem, LD
dc.contributor.author	Wang, Q https://orcid.org/0000-0002-5744-2331
dc.date.accessioned	2023-02-01T04:22:12Z
dc.date.available	2022-09-07
dc.date.available	2023-02-01T04:22:12Z
dc.date.issued	2022-12-20
dc.identifier.citation	Science of the Total Environment, 2022, 853, pp. 158684-158684
dc.identifier.issn	0048-9697
dc.identifier.issn	1879-1026
dc.identifier.uri	http://hdl.handle.net/10453/165777
dc.description.abstract	Methane production of waste activated sludge (WAS) in anaerobic digestion is hindered due to the rate-limited hydrolysis process and the low methane potential of WAS. Pretreatment of WAS is a common and appealing strategy to improve methane production in anaerobic digestion. In this study, we proposed to use urine, an easily obtained human waste with high ammonium concentration and pH, as a novel pretreatment strategy for anaerobic WAS digestion. Urine pretreatment at levels of 5-30 % (Vurine/Vurine+WAS) could substantially enhance methane production by 5-35 % in biochemical methane potential (BMP) tests, with the highest methane production of 179.6 ± 3.3 mL/g volatile solids (VS) achieved under the highest level of urine (i.e. 30 % urine addition). Based on the model analysis, the biochemical methane potential (B0) and hydrolysis rate of WAS (k) rose from 131.9 mL/g VS and 0.19 d-1 in the control without pretreatment to 136.3-178.2 mL/g VS and 0.22-0.30 d-1, respectively, after the urine pretreatment (5-30 % addition). Urine pretreatment with 5-30 % addition also improved the degradation extent (Y) of WAS by 3-35 %. The promising results indicate that urine pretreatment in anaerobic digestion is a promising technology to improve the efficiency of anaerobic digestion with environmental and economic benefits.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	Elsevier
dc.relation	http://purl.org/au-research/grants/arc/DP200100933
dc.relation	http://purl.org/au-research/grants/arc/FT200100264
dc.relation.ispartof	Science of the Total Environment
dc.relation.isbasedon	10.1016/j.scitotenv.2022.158684
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject.classification	Environmental Sciences
dc.subject.mesh	Ammonium Compounds
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Bioreactors
dc.subject.mesh	Digestion
dc.subject.mesh	Humans
dc.subject.mesh	Methane
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Humans
dc.subject.mesh	Sewage
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Methane
dc.subject.mesh	Ammonium Compounds
dc.subject.mesh	Digestion
dc.subject.mesh	Bioreactors
dc.subject.mesh	Humans
dc.subject.mesh	Ammonium Compounds
dc.subject.mesh	Methane
dc.subject.mesh	Bioreactors
dc.subject.mesh	Sewage
dc.subject.mesh	Waste Disposal, Fluid
dc.subject.mesh	Anaerobiosis
dc.subject.mesh	Digestion
dc.title	Urine pretreatment significantly promotes methane production in anaerobic waste activated sludge digestion.
dc.type	Journal Article
utslib.citation.volume	853
utslib.location.activity	Netherlands
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	embargoed	*
pubs.consider-herdc	false
utslib.copyright.embargo	2024-12-20T00:00:00+1000Z
dc.date.updated	2023-02-01T04:22:05Z
pubs.publication-status	Published
pubs.volume	853

Abstract:

Methane production of waste activated sludge (WAS) in anaerobic digestion is hindered due to the rate-limited hydrolysis process and the low methane potential of WAS. Pretreatment of WAS is a common and appealing strategy to improve methane production in anaerobic digestion. In this study, we proposed to use urine, an easily obtained human waste with high ammonium concentration and pH, as a novel pretreatment strategy for anaerobic WAS digestion. Urine pretreatment at levels of 5-30 % (Vurine/Vurine+WAS) could substantially enhance methane production by 5-35 % in biochemical methane potential (BMP) tests, with the highest methane production of 179.6 ± 3.3 mL/g volatile solids (VS) achieved under the highest level of urine (i.e. 30 % urine addition). Based on the model analysis, the biochemical methane potential (B0) and hydrolysis rate of WAS (k) rose from 131.9 mL/g VS and 0.19 d-1 in the control without pretreatment to 136.3-178.2 mL/g VS and 0.22-0.30 d-1, respectively, after the urine pretreatment (5-30 % addition). Urine pretreatment with 5-30 % addition also improved the degradation extent (Y) of WAS by 3-35 %. The promising results indicate that urine pretreatment in anaerobic digestion is a promising technology to improve the efficiency of anaerobic digestion with environmental and economic benefits.

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http://hdl.handle.net/10453/165777