Efficient utilization of waste wheat straw through humic acid and ferric chloride co-assisted hydrothermal pretreatment for fermentation to produce bioethanol.
Efficient utilization of waste wheat straw through humic acid and ferric chloride co-assisted hydrothermal pretreatment for fermentation to produce bioethanol.
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DOI：
10.1016/j.biortech.2022.128059
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发表时间：
2022-09
影响因子：
11.4
通讯作者：
Wei Tang;Caoxing Huang;Zhe Ling;Chenhuan Lai;Q. Yong
中科院分区：
文献类型：
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作者：
Wei Tang;Caoxing Huang;Zhe Ling;Chenhuan Lai;Q. Yong
废麦草中的吸附灰分和木质素是制约其高值化利用的主要因素。因此，采用腐殖酸（HA）和FeCl 3作为水热预处理添加剂，分别提高木质素的去除率和消除灰分的酸缓冲作用。结果表明，经10 g/L HA和20 mM FeCl 3预处理后，木质素和木聚糖的去除率分别从61.4%和14.7%提高到72.9%和38.7%。使WWS的酶解效率和乙醇得率分别从44.4%和20.55%提高到82.7%和36.86%。根据WWS的表征，HA和FeCl 3之间的协同作用有利于WWS的纤维素可及性和表面木质素面积正向变化，从而提高水解效率。
The adsorbed ash and lignin contained in waste wheat straw (WWS) have been the essential factors restricting its high-value utilization in biorefinery. Hence, humic acid (HA) and FeCl3as the additives of hydrothermal pretreatment were applied to simultaneously enhance the removal of lignin and eliminate the acid buffering of ash in WWS, respectively. The results showed that the xylan and lignin removal of WWS pretreated with 10 g/L HA and 20 mM FeCl3could be efficiently increased from 61.4% to 72.9% and from 14.7% to 38.7%, respectively. The enzymatic hydrolysis efficiency and ethanol yield of WWS were increased this way from 44.4% to 82.7% and from 20.55% to 36.86%, respectively. According to the characterization of WWS, the synergistic interaction between HA and FeCl3was beneficial to the cellulose accessibility and surface lignin area of WWS changed in positive directions, leading to the improvement of hydrolysis efficiency.