木糖
玉米秸秆
化学
水解
木质素
盐酸
糖
试剂
半纤维素
纤维素酶
酶水解
干草
核化学
还原糖
色谱法
有机化学
农学
作物
发酵
生物
作者
Wenzhi Li,Qiyu Liu,Qin Ma,Tingwei Zhang,Longlong Ma,Hasan Jameel,Hou‐min Chang
标识
DOI:10.1016/j.biortech.2016.08.025
摘要
A two-stage pretreatment process is proposed in this research in order to improve sugar recovery from corn stover. In the proposed process, corn stover is hydrolyzed by dilute hydrochloric acid to recover xylose, which is followed by a Fenton reagent oxidation to remove lignin. 0.7wt% dilute hydrochloric acid is applied in the first stage pretreatment at 120°C for 40min, resulting in 81.0% xylose removal. Fenton reagent oxidation (1g/L FeSO4·7H2O and 30g/L H2O2) is performed at room temperature (about 20°C) for 12 has a second stage which resulted in 32.9% lignin removal. The glucose yield in the subsequent enzymatic hydrolysis was 71.3% with a very low cellulase dosage (3FPU/g). This two-stage pretreatment is effective due to the hydrolysis of hemicelluloses in the first stage and the removal of lignin in the second stage, resulting in a very high sugar recovery with a low enzyme loading.
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