Implications of Downstream Nitrate Dosage in anaerobic sewers to control sulfide and methane emissions
dc.contributor.author
dc.date.accessioned
2016-07-22T07:35:15Z
dc.date.available
2016-07-22T07:35:15Z
dc.date.issued
2015-01-01
dc.identifier.issn
0043-1354
dc.identifier.uri
dc.description.abstract
Nitrate (NO3-) is commonly dosed in sewer systems to reduce sulfide (H2S) and methane (CH4) produced in anaerobic rising main pipes. However, anoxic conditions along the whole rising pipes are difficult and costly to maintain since nitrate is added at the upstream sections of the sewer. In this study we tested the effects of the Downstream Nitrate Dosage strategy (DND) in anaerobic pipes in a specially designed laboratory-scale systems that mimics a real rising main. Effectiveness of the strategy was assessed on H2S and CH4 abatement on the effluent of the lab sewer system. A combination of process (Normal Functioning monitoring and batch tests) and molecular (by 454-pyrosequencing) methods were used to investigate the impacts and microbial activities related to the nitrate addition. Results showed a complete abatement of H2S generated, with a fraction transformed to elemental sulfur (S0). Methane discharged was reduced to 50% while nitrate was added, due to the CH4 oxidation in the anoxic conditions established at the end of the pipe. Both sulfidogenic and methanogenic activities resumed upon cessation of NO3- dosage. An increase of microorganisms of the genera Simplicispira, Comamonas, Azonexus and Thauera was detected during nitrate addition. Regarding anoxic methane oxidation, only one Operational Taxonomic Unit (OTU) was identified, which is likely related with this metabolism. Obtained results are relevant for the optimal management of nitrate dosage strategies in sewer systems
dc.description.sponsorship
This study was funded by the Spanish Government Ministerio de Economía y Competitividad (project CTM 2011-27163) and projecte ARCOS (CGL2012-33033). Also theEuropeanCommission projects FP7-PEOPLE-2011-CIG303946 and 2010-RG277050.Maite Pijuan acknowledge the Ramon y Cajal research fellowship (RYC-2009-04959). Olga Auguet acknowledge the FI research fellowship (FI-DGR 2013-00434). Authors acknowledge the support from the Economy and Knowledge Department of the Catalan Government through a Consolidated Research Group (2014 SGR 291)-Catalan Institute for Water Research
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/MINECO//CGL2012-33033/ES/CONTRIBUCION DE LAS ARCHAEA NO CULTIVADAS EN EL RECICLAJE DE CARBONO ORGANICO EN SEDIMENTOS/
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.2014.09.034
dc.relation.ispartof
© Water Research, 2015, vol. 68, p. 522-532
dc.relation.ispartofseries
Articles publicats (D-B)
dc.rights
Tots els drets reservats
dc.subject
dc.title
Implications of Downstream Nitrate Dosage in anaerobic sewers to control sulfide and methane emissions
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
info:eu-repo/grantAgreement/EC/FP7/277050/EU/SULFIDE AND GREENHOUSE GAS EMISIONS FROM MEDITERRANEAN SEWERS/SGHGEMS
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
022970
dc.contributor.funder
dc.relation.ProjectAcronym
dc.identifier.eissn
1879-2448