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dc.contributor.author
Faust, Valentin
dc.contributor.author
Gruber, Wenzel
dc.contributor.author
Ganigué, Ramon
dc.contributor.author
Vlaeminck, Siegfried E.
dc.contributor.author
Udert, Kai M.
dc.date.accessioned
2022-11-01T10:27:54Z
dc.date.available
2022-11-01T04:23:04Z
dc.date.available
2022-11-01T10:27:54Z
dc.date.issued
2022-09-09
dc.identifier.issn
2690-0645
dc.identifier.other
10.1021/acsestengg.2c00082
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/578744
dc.description.abstract
Combining partial nitrification, granular activated carbon (GAC) filtration, and distillation is a well-studied approach to convert urine into a fertilizer. To evaluate the environmental sustainability of a technology, the operational carbon footprint and therefore nitrous oxide (N2O) emissions should be known, but N2O emissions from urine nitrification have not been assessed yet. Therefore, N2O emissions of a decentralized urine nitrification reactor were monitored for 1 month. During nitrification, 0.4-1.2% of the total nitrogen load was emitted as N2O-N with an average N2O emission factor (EFN2O) of 0.7%. Additional N2O was produced during anoxic storage between nitrification and GAC filtration with an estimated EFN2O of 0.8%, resulting in an EFN2O of 1.5% for the treatment chain. N2O emissions during nitrification can be mitigated by 60% by avoiding low dissolved oxygen or anoxic conditions and nitrite concentrations above 5 mg-N L-1. Minimizing the hydraulic retention time between nitrification and GAC filtration can reduce N2O formation during intermediate storage by 100%. Overall, the N2O emissions accounted for 45% of the operational carbon footprint of 14 kg-CO2,equiv kg-N-1 for urine fertilizer production. Using electricity from renewable sources and applying the proposed N2O mitigation strategies could potentially lower the carbon footprint by 85%.
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.subject
Anatomy
en_US
dc.subject
Anions
en_US
dc.subject
Distillation
en_US
dc.subject
Filtration
en_US
dc.subject
Nitrogen
en_US
dc.title
Nitrous Oxide Emissions and Carbon Footprint of Decentralized Urine Fertilizer Production by Nitrification and Distillation
en_US
dc.type
Journal Article
dc.date.published
2022-07-29
ethz.journal.title
ACS ES&T Engineering
ethz.journal.volume
2
en_US
ethz.journal.issue
9
en_US
ethz.journal.abbreviated
ACS EST Engg.
ethz.pages.start
1745
en_US
ethz.pages.end
1755
en_US
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02608 - Institut für Umweltingenieurwiss. / Institute of Environmental Engineering::03832 - Morgenroth, Eberhard / Morgenroth, Eberhard
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02608 - Institut für Umweltingenieurwiss. / Institute of Environmental Engineering::03832 - Morgenroth, Eberhard / Morgenroth, Eberhard
ethz.date.deposited
2022-11-01T04:23:07Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2022-11-01T10:27:55Z
ethz.rosetta.lastUpdated
2023-02-07T07:26:11Z
ethz.rosetta.versionExported
true
ethz.COinS
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