Influence of Steam Pretreatment Time on Chemical Composition and Simultaneous Saccharification and Fermentation for Ethanol from Pruning Shrub Stalks
Influence of Steam Pretreatment Time on Chemical Composition and Simultaneous Saccharification and Fermentation for Ethanol from Pruning Shrub Stalks
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蒸汽预处理时间对修枝灌木化学成分及同步糖化发酵乙醇的影响
DOI：
10.1166/jbmb.2011.1133
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发表时间：
2011-06-01
影响因子：
0.5
通讯作者：
Bu, Lingxi
中科院分区：
文献类型：
--
作者：
Jiang, Jianxin;Tang, Yong;Bu, Lingxi
胡枝子和沙柳灌木茎在220℃下蒸汽处理2~10min。本研究对天然原料和经过处理的原料的组成、结构以及同时糖化发酵(SSF)进行了比较研究。结果表明，随着水蒸气处理时间的延长，胡枝子和沙柳的水不溶物中半纤维素含量分别降至5.91%和11.98%，而未处理的水不溶物中半纤维素含量分别为32.37%和36.57%。然而，无论严重程度如何，纤维素含量都保持在相同的水平。用FT-IR和扫描电子显微镜对处理后的材料进行了表征。胡枝子和柳树在水蒸气处理的停留时间分别为4min和5min时，其SSF乙醇的最高得率分别为理论值的77.53%和62.79%。胡枝子和柳树的水蒸气处理使乙醇产量分别提高了4.18倍和6.53倍。
Shrub stalks of Lespedeza crytobotrya and Salix psammophila were steam pretreated at 220 degrees C for 2 to 10 min. The composition and structure, as well as simultaneous saccharfication and fermentation (SSF) of native and pretreated materials have been comparably investigated in this study. It was found that the content of hemicelluloses from water insoluble substance of pretreated Lespedeza and Salix was decreased to 5.91% and 11.98% with increasing the steam pretreatment time, compared to the untreated water insoluble substance of 32.37% and 36.57%, respectively. However, the cellulose content maintained the same level regardless of the severity. The characteristics of the pretreated material in terms of FT-IR and SEM analyses were discussed. The highest yields of SSF ethanol from pretreated Lespedeza and Salix were 77.53% and 62.79% of the theoretical values when their residence times of the steam pretreatment were 4 and 5 min, respectively. Steam pretreatment of Lespedeza and Salix increased the ethanol yields by factors of 4.18 and 6.53 based on the native stalks.