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, Lucía (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Colturato, Luis Felipe de Dornfeld Braga (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Vicent i Huguet, Teresa (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Date: |
2010 |
Abstract: |
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. |
Rights: |
Tots els drets reservats. |
Language: |
Anglès |
Document: |
Article ; recerca ; Versió acceptada per publicar |
Subject: |
Anaerobic digestion ;
Co-digestion ;
Municipal solid waste ;
Organic fraction ;
FOG waste |
Published in: |
Waste management, Vol. 30, Issue 10 (Oct. 2010) , p. 1854-1859, ISSN 0956-053X |
DOI: 10.1016/j.wasman.2010.03.029
Post-print
33 p, 615.9 KB
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Record created 2016-07-21, last modified 2023-10-06