pH pre-corrected liquid hot water pretreatment on corn stover with high hemicellulose recovery and low inhibitors formation

文献类型： 外文期刊

第一作者： Li, Hong-Qiang

作者： Li, Hong-Qiang;Jiang, Wei;Xu, Jian;Jia, Jing-Xia

作者机构：

关键词： pH pre-corrected liquid hot water;pretreatment;Hemicellulose;Oligosaccharide;Furfural;Acetyl group

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.642； 五年影响因子：9.237 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： A challenge for lignocellulosic pretreatment is how to retain hemicellulose as much as possible. To reduce the degradation of hemicellulose and increase the recovery of sugars, an effective pH pre-corrected liquid hot water pretreatment (LHWP) was developed by employing a small amount of NaOH (65/100 g substrate) to accelerate the hemicellulose deacetylation and simultaneously pre-correct the acid hydrolyzate in situ. The results showed that the pH pre-correction can control the hydrolyzate pH. Under the pretreatment severity (PS) of 4.0, the pH pre-corrected LHWP reduced the hemicellulose degradation by 35.3– 92.3%, decreased furfural formation by 90.5–99.8%. The highest hemicellulose recovery of 96.38% was obtained with pH pre-corrected by 2 g NaOH/100 g substrate. Enzymatic hydrolysis (EH) and simultaneous saccharification and fermentation (SSF) on the whole slurry from the pH pre-corrected LHWP showed that the hemicellulose retained in the solid residue did not bring significant resistance to cellulose EH (p = 0.837).

分类号： Q

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