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Anaerobic co-digestion of the organic fraction of municipal solid waste with FOG waste from a sewage treatment plant : recovering a wasted methane potential and enhancing the biogas yield
Martín González, Lucia (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Font Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Colturato, Luis Felipe de Dornfeld Braga (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)
Vicent i Huguet, Teresa (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química)

Data: 2010
Resum: Anaerobic digestion is applied widely to treat the source collected organic fraction of municipal solid wastes (SC-OFMSW). Lipid-rich wastes are a valuable substrate for anaerobic digestion due to their high theoretical methane potential. Nevertheless, although fat, oil and grease waste from sewage treatment plants (STP-FOGW) are commonly disposed of in landfill, European legislation is aimed at encouraging more effective forms of treatment. Co-digestion of the above wastes may enhance valorisation of STP-FOGW and lead to a higher biogas yield throughout the anaerobic digestion process. In the present study, STP-FOGW was evaluated as a co-substrate in wet anaerobic digestion of SC-OFMSW under mesophilic conditions (37 °C). Batch experiments carried out at different co-digestion ratios showed an improvement in methane production related to STP-FOGW addition. A 1:7 (VS/VS) STP-FOGW:SC-OFMSW feed ratio was selected for use in performing further lab-scale studies in a 5 L continuous reactor. Biogas yield increased from 0. 38 ± 0. 02 L g VSfeed⁻¹ to 0. 55 ± 0. 05 L g VSfeed⁻¹ as a result of adding STP-FOGW to reactor feed. Both VS reduction values and biogas methane content were maintained and inhibition produced by long chain fatty acid (LCFA) accumulation was not observed. Recovery of a currently wasted methane potential from STP-FOGW was achieved in a co-digestion process with SC-OFMSW.
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Anaerobic digestion ; Co-digestion ; Municipal solid waste ; Organic fraction ; FOG waste
Publicat a: Waste management, Vol. 30, Issue 10 (Oct. 2010) , p. 1854–1859, ISSN 0956-053X

DOI: 10.1016/j.wasman.2010.03.029

33 p, 615.9 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Enginyeries > Grup de Recerca en Compostatge (GICOM)
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