N2O and NO emissions from a partial nitrification sequencing batch reactor: Exploring dynamics, sources and minimization mechanisms
dc.contributor.author
dc.date.accessioned
2016-07-19T07:13:51Z
dc.date.available
2016-07-19T07:13:51Z
dc.date.issued
2013-06-01
dc.identifier.issn
0043-1354
dc.identifier.uri
dc.description.abstract
A sequencing batch reactor (SBR) was enriched with ammonia oxidizing bacteria (AOB) in order to treat synthetic reject wastewater (1g NH4+-N/L). Partial nitrification was successfully achieved at a NH4+-N to NO2--N conversion rate of 98%. The emission dynamics of nitrous oxide (N2O) and nitric oxide (NO) were monitored during normal operation and under 3 different cycle configurations. An N2O peak was detected during the first 5min of the cycle in all cases which corresponded to 60-80% of the total N2O emitted. When anoxic phases were introduced, N2O emissions were minimized but NO increased. Factors affecting the initial N2O peak were studied in a set of individual experiments. It was concluded that most of this N2O originated during settling due to biological reactions. Complete oxidation of NH4+ (or most likely hydroxylamine) as a result of sufficient aeration time can be a minimization strategy for N2O emissions in partial nitrification systems
dc.description.sponsorship
This study was funded by the Spanish Government, Ministerio de Economı´a y Competitividad (project CTM 2011-27163) and the European Commission FP7-PEOPLE-2011-CIG 303946 project. M. Pijuan also acknowledges the Ramon y Cajal research fellowship (RYC-2009-04959) provided by the Spanish Government
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/
info:eu-repo/grantAgreement/MICINN//RYC-2009-04959/ES/RYC-2009-04959/
dc.relation.isformatof
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.watres.2013.03.019
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© Water Research, 2013, vol. 47, núm. 9, p. 3131-3140
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Articles publicats (ICRA)
dc.rights
Tots els drets reservats
dc.subject
dc.title
N2O and NO emissions from a partial nitrification sequencing batch reactor: Exploring dynamics, sources and minimization mechanisms
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.identifier.idgrec
018695
dc.contributor.funder
dc.relation.FundingProgramme
dc.relation.ProjectAcronym
dc.identifier.eissn
1879-2448