title: Anaerobic digestion of giant reed for methane production.
abstract: As a fast growing plant, giant reed has good potential to be used as a feedstock for methane production via anaerobic digestion (AD). The effect of total solids (TS) content, an AD operating parameter, was studied. Results showed that increasing TS from 8% to 38% decreased methane yield, due to the inhibition of volatile fatty acids (VFAs) and total ammonia nitrogen (TAN); while the maximum volumetric methane production was obtained at 20-23% TS. Comparison of solid-state AD (SS-AD) at 20% TS and liquid AD (L-AD) at 8% TS was conducted at feedstock to effluent (F/E) ratios of 2.0, 3.5, and 5.0. The best performance was achieved at an F/E of 2.0, with methane yields of 129.7 and 150.8L-CH4/kg-VS for SS-AD and L-AD, respectively. Overall organic components were degraded by 17.7-28.5% and 24.0-26.6% in SS-AD and L-AD, respectively; among which cellulose showed the highest degradation rate and the highest contribution to methane production.
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, USA.
authors.forename: Liangcheng
authors.initials: L
authors.lastname: Yang
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, USA. Electronic address: li.851@osu.edu.
authors.forename: Yebo
authors.initials: Y
authors.lastname: Li
mesh_terms: D000641:Ammonia / Q000378:metabolism; D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D002851:Chromatography, High Pressure Liquid; D005232:Fatty Acids, Volatile / Q000378:metabolism; D007558:Italy; D008031:Lignin / Q000032:analysis / Q000378:metabolism*; D008697:Methane / Q000096:biosynthesis*; D008956:Models, Chemical; D006109:Poaceae / Q000737:chemistry*
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; C036909:lignocellulose; D000641:Ammonia; D008031:Lignin; D008697:Methane
keywords: Cellulose; Giant reed; Methane; Solid-state anaerobic digestion; Total solids