title: Biomethanization of sugar beet byproduct by semi-continuous single digestion and co-digestion with cow manure.
abstract: Dried pellet of exhausted sugar beet cossettes were digested alone and combined with cow manure as co-substrate in a mesophilic semi-continuous anaerobic system. In single digestion assay, the stable biogas production and stable reactor operation was observed at the hydraulic retention time (HRT) of 20days (OLR: 3.26gVS/Lreactord) which was the minimum HRT tolerated by the system. However, co-digestion with cow manure allowed to decrease the HRT until 15days (OLR: 4.97gVS/Lreactord) with 32% higher biogas generation and efficient reactor operation. Propionic acid was the predominant VFA observed during single digestion assay failure, while acetic acid accumulation was observed in the co-digestion assay. In both single and co-digestion assays, the recovery of digesters was possible by ceasing the feeding and re-inoculation with a well-adapted inoculum.
authors.affiliation: Department of Chemical Engineering and Food Technology, Faculty of Sciences, Agrifood Campus of International Excellence (CeiA3), University of Cádiz, 11510 Puerto Real, Cadiz, Spain. Electronic address: kaoutar.aboudi@uca.es.
authors.forename: Kaoutar
authors.initials: K
authors.lastname: Aboudi
authors.affiliation: Department of Chemical Engineering and Food Technology, Faculty of Sciences, Agrifood Campus of International Excellence (CeiA3), University of Cádiz, 11510 Puerto Real, Cadiz, Spain.
authors.forename: Carlos José
authors.initials: CJ
authors.lastname: Álvarez-Gallego
authors.affiliation: Department of Chemical Engineering and Food Technology, Faculty of Sciences, Agrifood Campus of International Excellence (CeiA3), University of Cádiz, 11510 Puerto Real, Cadiz, Spain.
authors.forename: Luis Isidoro
authors.initials: LI
authors.lastname: Romero-García
mesh_terms: D000818:Animals; D027461:Beta vulgaris / Q000737:chemistry / Q000378:metabolism; D056804:Biofuels; D002417:Cattle; D008372:Manure; D008697:Methane / Q000737:chemistry / Q000378:metabolism
chemical_list: D056804:Biofuels; D008372:Manure; D008697:Methane
keywords: Biogas production; Co-digestion; Cow manure; Semi-continuous anaerobic digestion; Sugar beet byproduct