Exploring GHG emissions in the mainstream SCEPPHAR configuration during wastewater resource recovery
Solís, B. (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Guisasola, Albert (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Pijuan, Maite (Universitat de Girona)
Baeza Labat, Juan Antonio (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2022
Abstract:	The wastewater sector paradigm is shifting from wastewater treatment to resource recovery. In addition, concerns regarding sustainability during the operation have increased. In this sense, many water utilities have become aware of the potential GHG emissions during the operation of wastewater treatment. This study assesses the nitrous oxide and methane emissions during the long-term operation of a novel wastewater resource recovery facility (WRRF) configuration: the mainstream SCEPPHAR. The long-term NO and CH emission factors calculated were in the low range of the literature, 1 % and 0. 1 %, respectively, even with high nitrite accumulation in the case of NO. The dynamics and possible sources of production of these emissions are discussed. Finally, different aeration strategies were implemented to study the impact on the NO emissions in the nitrifying reactor. Results showed that operating the pilot-plant under different dissolved oxygen concentrations (between 1 and 3 g O m) did not have an effect on the NO emission factor. Intermittent aeration was the aeration strategy that most mitigated the NO emissions in the nitrifying reactor, obtaining a reduction of 40 % compared to the normal operation of the pilot plant.
Grants:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1175 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1318 European Commission 690323
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Enhanced biological phosphorus removal (EBPR) ; GHG mitigation ; Greenhouse gases (GHG) ; Pilot plant ; Water resource recovery facility (WRRF)
Published in:	Science of the total environment, Vol. 849 (November 2022) , art. 157626, ISSN 1879-1026

DOI: 10.1016/j.scitotenv.2022.157626
PMID: 35901871

14 p, 1.9 MB

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