title: Effects of total ammonia nitrogen concentration on solid-state anaerobic digestion of corn stover.
abstract: The inhibitive effect of total ammonia nitrogen (TAN) (including NH3 and NH4(+)) on solid-state anaerobic digestion of corn stover was investigated in batch reactors at 37°C. The highest methane yield of 107.0 L/kg VS(feed) was obtained at a TAN concentration of 2.5 g/kg (based on total weight). TAN concentrations greater than 2.5 g/kg resulted in decreased methane yields, with a 50% reduction observed at a concentration of 6.0 g/kg. Reduced reaction rates and microbial activities for hydrolysis of cellulose and methanogenesis from acetate were observed at TAN concentrations higher than 4.3 g/kg. Strong ammonia stress was indicated at butyrate concentrations higher than 300 mg/kg. Result showed that the effluent of liquid anaerobic digestion can provide enough nitrogen for solid-state anaerobic digestion of corn stover.
authors.affiliation: Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster, OH 44691, USA.
authors.forename: Zhongjiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Fuqing
authors.initials: F
authors.lastname: Xu
authors.forename: Yebo
authors.initials: Y
authors.lastname: Li
mesh_terms: D000641:Ammonia / Q000494:pharmacology*; D000693:Anaerobiosis / Q000187:drug effects; D001419:Bacteria / Q000187:drug effects / Q000378:metabolism; D001673:Biodegradation, Environmental / Q000187:drug effects; D056804:Biofuels / Q000032:analysis; D002245:Carbon Dioxide / Q000032:analysis; D005232:Fatty Acids, Volatile / Q000032:analysis; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D006868:Hydrolysis / Q000187:drug effects; D007700:Kinetics; D008697:Methane / Q000032:analysis; D009584:Nitrogen / Q000494:pharmacology*; D012037:Refuse Disposal / Q000379:methods*; D014866:Waste Products / Q000032:analysis*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D056804:Biofuels; D005232:Fatty Acids, Volatile; D014866:Waste Products; D002245:Carbon Dioxide; D000641:Ammonia; D009584:Nitrogen; D008697:Methane
keywords: Ammonia inhibition; Biogas; Corn stover; Methane; Solid-state anaerobic digestion