Characterization of the gaseous and odour emissions from the composting of conventional sewage sludge
González, Daniel (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Guerra, N. (Universitat de Vic - Universitat Central de Catalunya)
Colón Jordà, Joan (Universitat de Vic - Universitat Central de Catalunya)
Gabriel, David (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Ponsá, Sergio (Universitat de Vic - Universitat Central de Catalunya)
Sánchez Bonastre, Armando (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Data:	2020
Resum:	Many different alternatives exist to manage and treat sewage sludge, all with the common drawback of causing environmental and odour impacts. The main objective of this work is to present a full inventory of the gaseous and odorous emissions generated during the bench-scale composting of conventional sewage sludge, aiming at assessing the process performance and providing global valuable information of the different gaseous emission patterns and emission factors found for greenhouse gases (GHG) and odorant pollutants during the conventional sewage sludge composting process. The main process parameters evaluated were the temperature of the material, specific airflow, average oxygen uptake rate (OUR), and final dynamic respiration index (DRI), resulting in a proper performance of the sewage sludge composting process and obtaining the expected final product. The obtained material was properly stabilized, presenting a final DRI of 1. 2 ± 0. 2 g 02-h-kg Volatile Solids (VS). GHGs emission factor, in terms of kg C02q-Mg dry matter of sewage sludge (DM-SS), was found to be 2. 30 x 10. On the other hand, the sewage sludge composting odour emission factor (OEF) was 2. 68 x 10ou-Mg DM-SS. Finally, the most abundant volatile organic compounds (VOC) species found in the composting gaseous emissions were terpenes, sulphur compounds, ketones, and aromatic hydrocarbons, whereas the major odour contributors identified were dimethyldisulphide, eucalyptol, and tx-pinene.
Drets:	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.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Sewage sludge ; Composting ; Gaseous emission ; Greenhouse gases (GHG) ; Odour ; VOCs
Publicat a:	Atmosphere (Basel), Vol. 11, Núm. 2 (February 2020) , art. 211, ISSN 2073-4433

DOI: 10.3390/atmos11020211

16 p, 1.8 MB

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