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Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Myers, Shanna
dc.contributor.author Mikola, Anna
dc.contributor.author Blomberg, Kati
dc.contributor.author Kuokkanen, Anna
dc.contributor.author Rosso, Diego
dc.date.accessioned 2021-03-22T07:13:47Z
dc.date.available 2021-03-22T07:13:47Z
dc.date.issued 2021-02-01
dc.identifier.citation Myers , S , Mikola , A , Blomberg , K , Kuokkanen , A & Rosso , D 2021 , ' Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge ' , Water Science and Technology , vol. 83 , no. 3 , pp. 641-651 . https://doi.org/10.2166/wst.2021.033 en
dc.identifier.issn 0273-1223
dc.identifier.issn 1996-9732
dc.identifier.other PURE UUID: fa6bc8a9-cb4f-4738-bb06-fb8f7eb7cc35
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/comparison-of-methods-for-nitrous-oxide-emission-estimation-in-fullscale-activated-sludge(fa6bc8a9-cb4f-4738-bb06-fb8f7eb7cc35).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85101585383&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/61151554/wst083030641.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/103319
dc.description Funding Information: This research was financially supported by Helsinki Region Environmental Services Authority (HSY), Aalto University, and the Finnish Water Utilities Association (FIWA) development fund. Publisher Copyright: © 2021 The Authors Water Science & Technology | Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
dc.description.abstract Nitrous oxide (N2O) gas transfer was studied in a full-scale process to correlate liquid phase N2O concentrations with gas phase N2O emissions and compare methods of determining the volumetric mass transfer coefficient, K(L)a. Off-gas and liquid phase monitoring were conducted at the Viikinmaki wastewater treatment plant (WWTP) over a two-week period using a novel method for simultaneous measurement of dissolved and off-gas N2O and O-2 from the same location. K(L)a was calculated with three methods: empirically, based on aeration superficial velocity, from experimentally determined O-2 K(L)a, and using a static value of best fit. The findings of this study indicated trends in local emitted N2O consistently matched trends in local dissolved N2O, but the magnitude of N2O emissions could not be accurately estimated without correction. After applying a static correction factor, the O-2 method, using experimentally determined O-2 K(L)a, provided the best N2O emission estimation over the data collection period. N2Oemissions estimated using the O-2 method had a root mean square error (RMSE) of 70.5 compared against measured concentrations ranging from 3 to 1,913 ppm and a maximum 28% error. The K(L)a value, and therefore the method of K(L)a determination, had a significant impact on estimated emissions. en
dc.format.extent 11
dc.format.extent 641-651
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher IWA Publishing
dc.relation.ispartofseries Water Science and Technology en
dc.relation.ispartofseries Volume 83, issue 3 en
dc.rights openAccess en
dc.title Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Built Environment
dc.contributor.department Water and Environmental Engineering
dc.contributor.department Helsinki Region Environmental Services Authority HSY
dc.contributor.department University of California at Irvine
dc.subject.keyword Full-scale
dc.subject.keyword Gas transfer
dc.subject.keyword Greenhouse gases
dc.subject.keyword Nitrous oxide
dc.subject.keyword Off-gas
dc.subject.keyword Wastewater treatment
dc.identifier.urn URN:NBN:fi:aalto-202103222598
dc.identifier.doi 10.2166/wst.2021.033
dc.type.version publishedVersion


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