Interdisciplinary Graduate School of Energy Systems, Prince of Songkla University, Hat Yai Campus, Hat Yai, Songkhla 90110, Thailand; Energy Technology Research Center, Faculty of Engineering, Prince of Songkla University, Hat Yai Campus, Hat Yai, Songkhla 90110, Thailand.
Research Unit in Bioconversion/Bioseparation for Value-Added Chemical Production, Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok, Thailand.
Bioresour Technol. 2020 Apr;302:122785. doi: 10.1016/j.biortech.2020.122785. Epub 2020 Jan 11.
Pretreatment is required for the enhancement of the bioconversion of lignocellulosic biomass. This study aimed to develop an integrated process producing efficient biochemical conversion of rubber wood waste (RW) into co-biofuels, fermentable sugar and methane. The glucan conversion was enhanced to 93.8% with temperature (210 °C) and delignification by organosolv pretreatment (OS). Thereafter, anaerobic digestion of the residue left after enzymatic hydrolysis was conducted which further improved the methane yield (205.5 LCH/kg VS) by 33% over hydrothermal pretreatment (154.3 LCH/kg VS). Delignification during OS plays a key role in improving the degradability of RW resulting in efficient energy recovery (11.23 MJ/kg pretreated RW) which was clearly higher than an integrated process based on hydrothermal (HT) or HT plus process water. Scaled up to a biorefinery, the integrated process based on OS would economically produce fermentable sugar while other value-added chemicals might be produced from the process water.
预处理是提高木质纤维素生物质生物转化效率的必要条件。本研究旨在开发一种集成工艺，将橡胶木废料（RW）高效转化为共生物燃料、可发酵糖和甲烷。通过有机溶媒预处理（OS）的高温（210°C）和脱木质素作用，将葡聚糖转化率提高到 93.8%。然后，对酶解后剩余残渣进行厌氧消化，与水热预处理（154.3 LCH/kg VS）相比，甲烷产量进一步提高了 33%（205.5 LCH/kg VS）。OS 过程中的脱木质素作用对提高 RW 的可降解性起着关键作用，从而实现高效的能量回收（11.23 MJ/kg 预处理 RW），明显高于基于水热（HT）或 HT 加工艺水的集成工艺。在扩大到生物炼制厂规模时，基于 OS 的集成工艺将经济地生产可发酵糖，而其他附加值化学品可能从工艺水中生产。
