Thermophilic co-digestion of organic fraction of municipal solid wastes with FOG wastes from a sewage treatment plant : reactor performance and microbial community monitoring

• Autor(a) principal: Martín-González, Lucia
• Data de Publicação: 2011
• Outros Autores: Castro, Rita, Pereira, M. A., Alves, M. M., Font, Xavier, Vicent, Teresa
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/22460
• topic: Thermophilic anaerobic co-digestion; OFMSW; FOG wastes; PCR-DGGE; Microbial diversity; Science & Technology

Working at thermophilic conditions instead of mesophilic, and also the addition of a co-substrate, are both ways to intend to improve the anaerobic digestion of the source-collected organic fraction of municipal solid wastes (SC-OFMSW). Addition of sewage treatment plant fat, oil and grease wastes (STP-FOGW), that are nowadays sent to landfill, would represent an opportunity to recover a wasted methane potential and, moreover, improve the whole process. In this study, after a first period feeding only SC-OFMSW, a co-digestion step was performed maintaining thermophilic conditions. During the co-digestion period enhancements in biogas production (52 %) and methane yield (38 %) were achieved. In addition, monitoring of microbial structure by using PCR-DGGE and cloning techniques showed that bacterial community profiles clustered in two distinct groups, before and after the extended contact with STP-FOGW, being more affected by the STP-FOGW addition than the archaeal one.