title: A mass diffusion-based interpretation of the effect of total solids content on solid-state anaerobic digestion of cellulosic biomass.
abstract: In solid-state anaerobic digestion (SS-AD) of cellulosic biomass, the volumetric methane production rate has often been found to increase with the increase in total solids (TS) content until a threshold is reached, and then to decrease. This phenomenon cannot be explained by conventional understanding derived from liquid anaerobic digestion. This study proposed that the high TS content-caused mass diffusion limitation may be responsible for the observed methane production deterioration. Based on this hypothesis, a new SS-AD model was developed by taking into account the mass diffusion limitation and hydrolysis inhibition. The good agreement between model simulation and the experimental as well as literature data verified that the observed reduction in volumetric methane production rate could be ascribed to hydrolysis inhibition as a result of the mass diffusion limitation in SS-AD.
authors: 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: Fuqing
authors: F
authors: Xu
authors: The Ohio State University ATI, 1328 Dover Rd, Wooster, OH 44691, USA. Electronic address: wang.3997@osu.edu.
authors: Zhi-Wu
authors: ZW
authors: Wang
authors: 303# Shanghai Jiaotong University, 800 Dongchuan Rd, Shanghai 200240, China; The Ohio State University ATI, 1328 Dover Rd, Wooster, OH 44691, USA.
authors: Li
authors: L
authors: Tang
authors: 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: Yebo
authors: Y
authors: Li
mesh_terms: D000693:Anaerobiosis; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D002482:Cellulose / Q000737:chemistry*; D003198:Computer Simulation; D004058:Diffusion; D008697:Methane / Q000096:biosynthesis; D008962:Models, Theoretical; D015203:Reproducibility of Results
chemical_list: D002482:Cellulose; D008697:Methane
keywords: Anaerobic digestion; Diffusion; Hydrolysis; Inhibition; Methane