总氨氮浓度对玉米秸秆固态厌氧消化的影响。
Effects of total ammonia nitrogen concentration on solid-state anaerobic digestion of corn stover.
机构信息
Department of Food, Agricultural and Biological Engineering, The Ohio State University, Ohio Agricultural Research and Development Center, Wooster, OH 44691, USA.
出版信息
Bioresour Technol. 2013 Sep;144:281-7. doi: 10.1016/j.biortech.2013.06.106. Epub 2013 Jul 2.
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.
在 37°C 的分批式反应器中，考察了总氨氮（TAN）（包括 NH3 和 NH4(+)）对玉米秸秆固态厌氧消化的抑制作用。在 TAN 浓度为 2.5 g/kg（基于总重量）时，获得了最高的甲烷产率 107.0 L/kg VS（进料）。TAN 浓度大于 2.5 g/kg 会导致甲烷产率降低，在浓度为 6.0 g/kg 时，甲烷产率降低了 50%。在 TAN 浓度高于 4.3 g/kg 时，观察到纤维素水解和乙酸盐产甲烷的反应速率和微生物活性降低。丁酸浓度高于 300 mg/kg 时，表明存在强烈的氨胁迫。结果表明，液体厌氧消化的流出物可为玉米秸秆的固态厌氧消化提供足够的氮。
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