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

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Resumo: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.
Autores principais:Martín-González, Lucia
Outros Autores:Castro, Rita; Pereira, M. A.; Alves, M. M.; Font, Xavier; Vicent, Teresa
Assunto:Thermophilic anaerobic co-digestion OFMSW FOG wastes PCR-DGGE Microbial diversity
Ano:2011
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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