期刊
BIORESOURCE TECHNOLOGY
卷 264, 期 -, 页码 327-334出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.05.090
关键词
Hydrothermal; Ultrafine grinding; Combined pretreatment; Enzymatic hydrolysis; Structural parameters
资金
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-17R105]
- national modern agricultural industry technology system [CARS-36]
- National Natural Science Foundation of China [31271611, 31571569]
A thorough assessment of the microstructural changes and synergistic effects of hydrothermal and/or ultrafine grinding pretreatment on the subsequent enzymatic hydrolysis of corn stover was performed in this study. The mechanism of pretreatment was elucidated by characterizing the particle size, specific surface area (SSA), pore volume (PV), average pore size, cellulose crystallinity (CrI) and surface morphology of the pretreated samples. In addition, the underlying relationships between the structural parameters and final glucose yields were elucidated, and the relative significance of the factors influencing enzymatic hydrolyzability were assessed by principal component analysis (PCA). Hydrothermal pretreatment at a lower temperature (170 degrees C) combined with ultrafine grinding achieved a high glucose yield (80.36%) at a low enzyme loading (5 filter paper unit (FPU)/g substrate) which is favorable. The relative significance of structural parameters in enzymatic hydrolyzability was SSA > PV > average pore size > CrI/cellulose > particle size. PV and SSA exhibited logarithmic correlations with the final enzymatic hydrolysis yield.
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