Abstract:Aming at resolving the structural inhibition of Spartina alterniflora on its anaerobic digestion, experiments were performed for investigating effects of steam explosion pretreatment by a high-speed steam explosion equipment under 1.5, 2.0 and 3.0MPa pressure on biogas yields, and rubbing treatment was used as control. Anaerobic digestibility and biogas yield of S. alterniflora were evaluated by anaerobic batch digestion experiments. With the increase of steam explosion pressure, the cumulative biogas yield declined. The maxium cumulative biogas yield of 293mL/g VS was obtained at 1.5MPa after 55 days of digestion, which was the double of that at 3.0MPa. The cumulative biogas yield of S. alterniflora by rubbing treatment was 239 mL/gVS, which was much more than that of the 2.0 and 3.0MPa treatments. The acidogenic rate of 2.0 and 3.0MPa treatments were fast than that of 1.5MPa treatment and caused VFA accumulation. Propionic acid concentration of 2.0 and 3.0MPa treatments was higher than 1000mg/L at the first 20~25 days, which resulting in the inhibition of the activity of methane-gens, but steam explosion at 1.5MPa could operate well.
邹星星, 郑正, 杨世关, 陈广银, 李继红. 汽爆预处理对互花米草厌氧发酵产气特性的影响[J]. 中国环境科学, 2009, 29(10): 1117-1120.
ZOU Xing-Xing, ZHENG Zheng, YANG Shi-Guan, CHEN Guang-Yin, LI Ji-Hong. Effect of steam explosion pretreatment on biogas production characteristics of anaerobic fermentation of Spartina Alterniflora.. CHINA ENVIRONMENTAL SCIENCECE, 2009, 29(10): 1117-1120.