Effect of process parameters and operational mode on nitrous oxide emissions from a nitritation reactor treating reject wastewater
dc.contributor.author
dc.date.accessioned
2016-07-26T11:36:57Z
dc.date.available
2016-07-26T11:36:57Z
dc.date.issued
2014-02-01
dc.identifier.issn
0043-1354
dc.identifier.uri
dc.description.abstract
Nitrous oxide (N2O) and methane emissions were monitored in a continuous granular airlift nitritation reactor from ammonium-rich wastewater (reject wastewater). N2O emissions were found to be dependent on dissolved oxygen (DO) concentration in the range of 1-4.5mgO2/L, increasing within this range when reducing the DO values. At higher DO concentrations, N2O emissions remained constant at 2.2% of the N oxidized to nitrite, suggesting two different mechanisms behind N2O production, one dependent and one independent of DO concentration. Changes on ammonium, nitrite, free ammonia and free nitrous acid concentrations did not have an effect on N2O emissions within the concentration range tested. When operating the reactor in a sequencing batch mode under high DO concentration (>5mgO2/L), N2O emissions increased one order of magnitude reaching values of 19.3±7.5% of the N oxidized. Moreover, CH4 emissions detected were due to the stripping of the soluble CH4 that remained dissolved in the reject wastewater after anaerobic digestion. Finally, an economical and carbon footprint assessment of a theoretical scaled up of the pilot plant was conducted
dc.description.sponsorship
AGAUR and ACC1Ó (Secretaria d’Universitats i Recerca del Departament d’Economia i Coneixement de la Generalitat de Catalunya), 2010VALOR0096, Ministerio de Economía y Competitividad (projects CTM 2011-27163 and CTQ2011-24745/PPQ) and the European Commission FP7-PEOPLE-2011-CIG 303946
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier
dc.relation
info:eu-repo/grantAgreement/MICINN//CTM2011-27163/ES/GASES DE EFECTO INVERNADERO EN LOS SISTEMAS DE TRANSPORTE Y TRATAMIENTO DE AGUAS RESIDUALES: EVALUACION DE LAS EMISIONES/
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Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.watres.2013.11.009
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© Water Research, 2014, vol. 49, p. 23-33
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Articles publicats (ICRA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Effect of process parameters and operational mode on nitrous oxide emissions from a nitritation reactor treating reject wastewater
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/embargoedAccess
dc.embargo.terms
Cap
dc.date.embargoEndDate
info:eu-repo/date/embargoEnd/2026-01-01
dc.relation.projectID
info:eu-repo/grantAgreement/EC/FP7/303946/EU/Exploring novel nitrifier pathways to minimise direct greenhouse gas emissions from WWTPs./NITRI-GHG
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.contributor.funder
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
1879-2448