title: Thermophilic co-digestion of organic fraction of municipal solid wastes with FOG wastes from a sewage treatment plant: reactor performance and microbial community monitoring.
abstract: Working at thermophilic conditions instead of mesophilic, and also the addition of a co-substrate, are both the 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 (36%) 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.
authors.affiliation: Departament d'Enginyeria Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
authors.forename: Lucia
authors.initials: L
authors.lastname: Martín-González
authors.forename: Rita
authors.initials: R
authors.lastname: Castro
authors.forename: M Alcina
authors.initials: MA
authors.lastname: Pereira
authors.forename: M Madalena
authors.initials: MM
authors.lastname: Alves
authors.forename: Xavier
authors.initials: X
authors.lastname: Font
authors.forename: Teresa
authors.initials: T
authors.lastname: Vicent
mesh_terms: D001421:Bacteria, Anaerobic / Q000235:genetics / Q000378:metabolism*; D056804:Biofuels; D019149:Bioreactors; D003001:Cloning, Molecular; D019295:Computational Biology; D017931:DNA Primers / Q000235:genetics; D058645:Denaturing Gradient Gel Electrophoresis; D005223:Fats; D008697:Methane / Q000096:biosynthesis*; D009821:Oils; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012037:Refuse Disposal / Q000379:methods*; D017422:Sequence Analysis, DNA; D012722:Sewage / Q000382:microbiology*; D013045:Species Specificity
chemical_list: D056804:Biofuels; D017931:DNA Primers; D005223:Fats; D009821:Oils; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D008697:Methane