Effect of temperature on N₂O emissions from a highly enriched nitrifying granular sludge performing partial nitritation of a lowstrength wastewater
Reino, Clara (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Van Loosdrecht, Mark C. M. (Delft University of Technology. Department of Biotechnology)
Carrera, Julian (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Pérez Cañestro, Julio (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2017
Abstract:	In the race to achieve a sustainable urban wastewater treatment plant, not only the energy requirements have to be considered but also the environmental impact of the facility. Thus, nitrous oxide (N₂O) emissions are a key-factor to pay attention to, since they can dominate the total greenhouse gases emissions from biological wastewater treatment. In this study, N2O production factors were calculated during the operation of a granular sludge airlift reactor performing partial nitritation treating a low-strength synthetic influent, and furthermore, the effect of temperature on N₂O production was assessed. Average gas emission relative to conversion of ammonium was 1. 5 ± 0. 3% and 3. 7 ± 0. 5% while the effluent contained 0. 5 ± 0. 1% and 0. 7 ± 0. 1% (% N-oxidized) at 10 and 20 ºC, respectively. Hence, temperature increase resulted in higher N2O production. The reasons why high temperature favoured N₂O production remained unclear, but different theoretical hypotheses were suggested.
Grants:	European Commission 326705 European Commission COST-STSM-ES1202-24481 Ministerio de Economía y Competitividad CTQ2014-60495-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1255
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Nitrous oxide; ; Emission factors; ; Partial nitritation; ; Temperature; ; Nitrotoga
Published in:	Chemosphere, Vol. 185 (Oct. 2017) , p. 336-343, ISSN 1879-1298

DOI: 10.1016/j.chemosphere.2017.07.017

Post-print 29 p, 559.7 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > GENOCOV
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