Identifying N2O formation and emissions from a full-scale partial nitritation reactor

Identifying N2O formation and emissions from a full-scale partial nitritation reactor

In this study, N2O formation and emissions from a full-scale partial nitritation (SHARON) reactor were identified through a three-weeks monitoring campaign during which the off-gas was analysed for N2O, O2, CO2 and NO. The overall N2O emission was 3.7% of the incoming ammonium load. By fitting the N...

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Veröffentlicht in:Water research (Oxford) 2016-01, Vol.88, p.575-585
Hauptverfasser: Mampaey, Kris E., De Kreuk, Merle K., van Dongen, Udo G.J.M., van Loosdrecht, Mark C.M., Volcke, Eveline I.P.
Format: Artikel
Sprache:eng
Schlagworte:
Air Pollutants - analysis
Ammonium Compounds - analysis
Bioreactors
Carbon dioxide
Emission
Emission analysis
Formations
Full-scale measurement
Greenhouse gas
kLa monitoring
Liquids
Monitoring
Nitrification
Nitritation
Nitrous oxide
Nitrous Oxide - metabolism
Nitrous oxides
Reactors
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Wastewater
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Zusammenfassung:In this study, N2O formation and emissions from a full-scale partial nitritation (SHARON) reactor were identified through a three-weeks monitoring campaign during which the off-gas was analysed for N2O, O2, CO2 and NO. The overall N2O emission was 3.7% of the incoming ammonium load. By fitting the N2O emission to a theoretical gas stripping profile, the N2O emissions could be assigned to aerobically formed N2O and N2O formed under anoxic conditions. This was further substantiated by liquid N2O measurements. Under standard operation, 70% of the N2O emission was attributed to anoxic N2O formation. Dedicated experiments revealed that low dissolved oxygen concentrations (
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2015.10.047