Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China; Guangdong Key Laboratory of New and Renewable Energy Research and Development, Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.
Guangdong Key Laboratory of New and Renewable Energy Research and Development, Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China.
Bioresour Technol. 2019 Dec;294:122094. doi: 10.1016/j.biortech.2019.122094. Epub 2019 Sep 4.
Pretreatment is a vital process for efficient saccharification and utilization of lignocellulose. In this study, crude glycerol derived from biodiesel production was used for pretreatment to facilitate selective saccharification via fast pyrolysis. Due to the efficient removal of alkali and alkaline earth metals (>95.0%) and lignin (79.4%) by crude glycerol pretreatment, the yield of levoglucosan was evaluated to 25.2% as compared to those from pure glycerol pretreated (14.4%) and untreated sugarcane bagasse (8.4%). Meanwhile, the production of inhibitors (e.g. acetic acid, phenol) to biocatalysts was also obviously inhibited from crude glycerol pretreated biomass. Consequently, this work provided a cost-effective and eco-friendly pretreatment mode, which could not only make full utilization of crude glycerol, but also improve the fermentability of lignocellulosic pyrolysate.
预处理是提高木质纤维素糖化和利用效率的关键步骤。在本研究中，我们利用生物柴油生产过程中产生的粗甘油进行预处理，以通过快速热解实现选择性糖化。由于粗甘油预处理能够有效地去除碱金属和碱土金属（>95.0%）和木质素（79.4%），与纯甘油预处理（14.4%）和未经处理的甘蔗渣（8.4%）相比，左旋葡聚糖的得率为 25.2%。同时，粗甘油预处理生物质中抑制剂（如乙酸、苯酚）的生成也明显受到抑制。因此，这项工作提供了一种经济实惠且环保的预处理方式，不仅可以充分利用粗甘油，还可以提高木质纤维素热解产物的发酵性能。
