title: Biogas production from spent rose hips (Rosa canina L.): fraction separation, organic loading and co-digestion with N-rich microbial biomass.
abstract: Complex waste streams originating from extraction processes containing residual organic solvents and increased C/N ratios have not yet been considered as feedstock for biogas production to a great extent. In this study, spent rosehip (Rosa canina L.) solid residue (64%VS, 22 MJ/kg HHV, 30C/1N) was obtained from an industrial ethanol aided extraction process, and extensively examined in an automated batch bioreactor system for biogas production. Fraction separation of the compact lignocellulosic seeds increased the available sugar and ethanol content, resulting in high biogas potential of the sieved residue (516 NL/kg VS'). In co-digestion of spent rosehip substrate with non-deactivated nitrogen rich microbial co-substrates, methanogenesis was favored (Y(m) > 68%(CH4)). In individual digestion of microbial co-substrates, this was not the case, as biogas with 28 vol.% N2 was produced from activated sludge supplement. Therefore, effective inhibition of exogenous microbiota was achieved in the presence of carbonaceous spent rose hip.
authors.affiliation: Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia. Electronic address: gasan.osojnik@ki.si.
authors.forename: Ilja Gasan
authors.initials: IG
authors.lastname: Osojnik Črnivec
authors.affiliation: Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia. Electronic address: petra.muri@ki.si.
authors.forename: Petra
authors.initials: P
authors.lastname: Muri
authors.affiliation: Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia; Centre of Excellence for Low Carbon Technologies, Hajdrihova 19, SI-1001 Ljubljana, Slovenia. Electronic address: petar.djinovic@ki.si.
authors.forename: Petar
authors.initials: P
authors.lastname: Djinović
authors.affiliation: Laboratory for Environmental Sciences and Engineering, National Institute of Chemistry, Hajdrihova 19, SI-1001 Ljubljana, Slovenia; Centre of Excellence for Low Carbon Technologies, Hajdrihova 19, SI-1001 Ljubljana, Slovenia. Electronic address: albin.pintar@ki.si.
authors.forename: Albin
authors.initials: A
authors.lastname: Pintar
mesh_terms: D001673:Biodegradation, Environmental; D056804:Biofuels; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism; D005638:Fruit / Q000737:chemistry*; D008031:Lignin / Q000378:metabolism; D008697:Methane / Q000096:biosynthesis*; D009584:Nitrogen / Q000378:metabolism; D027826:Rosa / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis*
chemical_list: D056804:Biofuels; D014866:Waste Products; C036909:lignocellulose; D002244:Carbon; D008031:Lignin; D009584:Nitrogen; D008697:Methane
keywords: Biodegradation; Biogas; Co-digestion; Dog rose; Microbial co-substrates