title: Solid state anaerobic co-digestion of yard waste and food waste for biogas production.
abstract: Food and yard wastes are available year round at low cost and have the potential to complement each other for SS-AD. The goal of this study was to determine optimal feedstock/effluent (F/E) and food waste/yard waste mixing ratios for optimal biogas production. Co-digestion of yard and food waste was carried out at F/E ratios of 1, 2, and 3. For each F/E ratio, food waste percentages of 0%, 10%, and 20%, based on dry volatile solids, were evaluated. Results showed increased methane yields and volumetric productivities as the percentage of food waste was increased to 10% and 20% of the substrate at F/E ratios of 2 and 1, respectively. This study showed that co-digestion of food waste with yard waste at specific ratios can improve digester operating characteristics and end performance metrics over SS-AD of yard waste alone.
authors.affiliation: Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, United States.
authors.forename: Dan
authors.initials: D
authors.lastname: Brown
authors.forename: Yebo
authors.initials: Y
authors.lastname: Li
mesh_terms: D000704:Analysis of Variance; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D056804:Biofuels; D019149:Bioreactors; D002851:Chromatography, High Pressure Liquid; D005502:Food; D008697:Methane / Q000096:biosynthesis*; D006109:Poaceae / Q000737:chemistry / Q000378:metabolism*; D014866:Waste Products
chemical_list: D056804:Biofuels; D014866:Waste Products; D008697:Methane