Item
Ministerio de EconomÃa y Competitividad (Espanya)
Ministerio de Ciencia e Innovación (Espanya) |
|
RodrÃguez-Caballero, Adrián
Pijuan i Vilalta, Maite |
|
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 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 |
|
application/pdf | |
http://hdl.handle.net/10256/12576 | |
eng | |
Elsevier | |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.watres.2013.03.019 info:eu-repo/semantics/altIdentifier/issn/0043-1354 info:eu-repo/semantics/altIdentifier/eissn/1879-2448 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/ info:eu-repo/grantAgreement/EC/FP7/303946/EU/Exploring novel nitrifier pathways to minimise direct greenhouse gas emissions from WWTPs./NITRI-GHG |
|
Tots els drets reservats | |
Nitrificació
Nitrification Aigües residuals -- Anà lisi Sewage -- nalysis Bioreactors Aigües residuals -- Depuració -- Oxidació Sewage -- Purification -- Oxidation |
|
N2O and NO emissions from a partial nitrification sequencing batch reactor: Exploring dynamics, sources and minimization mechanisms | |
info:eu-repo/semantics/article | |
DUGiDocs |