In this research, sources of methane emissions of an anaerobic digester (AD) system at a municipal wastewater treatment plant (WWTP) with 260,000 population equivalent (PE) capacity were detected by a non-dispersive infrared (NDIR) camera. The located emissions were evaluated qualitatively and were documented with photos and video films. Subsequently, the emission sources were quantified individually using different methods like the Flux-Chamber method and sampling from the digester's circulation pipe. The dissolved methane in the sludge digester was measured via GC-MS and 6.8% oversaturation compared to the equilibrium after Henry's law was found. Additionally, the residual gas potential of the digestate was measured using batch tests with ten days' additional stabilisation time. The PE-specific residual gas production of the full-scale AD was calculated to 12.4 g CH4/(PE · y). An extended COD balance including methane emissions for the whole digester system was calculated. Also the measured methane loads were calculated and summed up. The total methane loss of the AD was calculated at 24.6 g CH4/(PE · y), which corresponds to 0.4% of the produced biogas (4,913 g CH4/(PE · y)). PE-specific methane emission factors are presented for each investigated (point) source like the sludge outlet at the digester's head, a leaking manhole sealing and cracks in the concrete structure.
en
dc.language
English
-
dc.language.iso
en
-
dc.publisher
IWA PUBLISHING
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dc.relation.ispartof
Water Science & Technology
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dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
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dc.subject
anaerobic sludge stabilisation
en
dc.subject
greenhouse gases
en
dc.subject
methane
en
dc.title
Quantifying methane emissions from anaerobic digesters
en
dc.type
Article
en
dc.type
Artikel
de
dc.rights.license
Creative Commons Namensnennung 4.0 International
de
dc.rights.license
Creative Commons Attribution 4.0 International
en
dc.rights.holder
The Author(s) 2019
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dc.type.category
Original Research Article
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tuw.journal.peerreviewed
true
-
tuw.peerreviewed
true
-
tuw.version
vor
-
dcterms.isPartOf.title
Water Science & Technology
-
tuw.publication.orgunit
E226-01 - Forschungsbereich Wassergütewirtschaft
-
tuw.publisher.doi
10.2166/wst.2019.415
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dc.identifier.eissn
1996-9732
-
dc.identifier.libraryid
AC15593129
-
dc.identifier.urn
urn:nbn:at:at-ubtuw:3-8612
-
tuw.author.orcid
0000-0002-0636-7749
-
tuw.author.orcid
0000-0002-9764-7585
-
tuw.author.orcid
0000-0002-0338-9299
-
tuw.author.orcid
0000-0002-7757-4163
-
dc.rights.identifier
CC BY 4.0
de
dc.rights.identifier
CC BY 4.0
en
item.languageiso639-1
en
-
item.cerifentitytype
Publications
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item.cerifentitytype
Publications
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item.openairecristype
http://purl.org/coar/resource_type/c_18cf
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item.openairecristype
http://purl.org/coar/resource_type/c_18cf
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item.fulltext
with Fulltext
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item.openaccessfulltext
Open Access
-
item.grantfulltext
open
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item.openairetype
Article
-
item.openairetype
Artikel
-
crisitem.author.dept
E226-01 - Forschungsbereich Wassergütewirtschaft
-
crisitem.author.dept
E226 - Institut für Wassergüte und Ressourcenmanagement
-
crisitem.author.dept
E226-01 - Forschungsbereich Wassergütewirtschaft
-
crisitem.author.orcid
0000-0002-9764-7585
-
crisitem.author.orcid
0000-0002-7757-4163
-
crisitem.author.parentorg
E226 - Institut für Wassergüte und Ressourcenmanagement
-
crisitem.author.parentorg
E200 - Fakultät für Bau- und Umweltingenieurwesen
-
crisitem.author.parentorg
E226 - Institut für Wassergüte und Ressourcenmanagement