title: Biogas energy production from tropical biomass wastes by anaerobic digestion.
abstract: Anaerobic digestion (AD) is an attractive technology in tropical regions for converting locally abundant biomass wastes into biogas which can be used to produce heat, electricity, and transportation fuels. However, investigations on AD of tropical forestry wastes, such as albizia biomass and food wastes, such as taro, papaya, and sweet potato, are limited. In this study, these tropical biomass wastes were evaluated for biogas production by liquid AD (L-AD) and/or solid-state AD (SS-AD), depending on feedstock characteristics. When albizia leaves and chips were used as feedstocks, L-AD had greater methane yields (161 and 113 L kg(-1)VS, respectively) than SS-AD (156.8 and 59.6 L kg(-1)VS, respectively), while SS-AD achieved 5-fold higher volumetric methane productivity than L-AD. Mono-digestion and co-digestion of taro skin, taro flesh, papaya, and sweet potato achieved methane yields from 345 to 411 L kg(-1)VS, indicating the robustness of AD technology.
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, USA.
authors.forename: Xumeng
authors.initials: X
authors.lastname: Ge
authors.affiliation: USDA, ARS, DKI US PBARC, Plant Genetic Resources and Disease Research, 64 Nowelo Street, Hilo, HI 96720, USA.
authors.forename: Tracie
authors.initials: T
authors.lastname: Matsumoto
authors.affiliation: USDA, ARS, DKI US PBARC, Plant Genetic Resources and Disease Research, 64 Nowelo Street, Hilo, HI 96720, USA.
authors.forename: Lisa
authors.initials: L
authors.lastname: Keith
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, USA. Electronic address: li.851@osu.edu.
authors.forename: Yebo
authors.initials: Y
authors.lastname: Li
mesh_terms: D031289:Albizzia / Q000737:chemistry; D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D056804:Biofuels; D018533:Biomass; D005936:Glucans / Q000032:analysis; D008697:Methane / Q000032:analysis; D018515:Plant Leaves / Q000737:chemistry; D011134:Polysaccharides / Q000032:analysis; D012037:Refuse Disposal / Q000379:methods*; D014329:Tropical Climate; D014866:Waste Products
chemical_list: D056804:Biofuels; D005936:Glucans; D011134:Polysaccharides; D014866:Waste Products; C007916:hemicellulose; D008697:Methane
keywords: Albizia; Anaerobic digestion; Biogas; Biomass waste; Tropical