Acid hydrotrope pretreatment has attracted widespread attention due to its efficient separation of lignocellulose. However, current acid hydrotrope pretreatment needs a large quantity of hydrotrope, and its recovery requires high energy consumption. In this study, wheat straw was pretreated using low-concentration -toluenesulfonic acid (-TsOH) to maximize the production of fermentable sugars. -TsOH from the hydrolysate was recovered by hyper-cross-linked resin. The results showed that under the optimal pretreatment conditions (1 % -TsOH, reaction temperature at140°C and reaction time at 1.5 h), the xylose yield was 85.66 %, and the cellulose conversion from enzymatic hydrolysis of pretreated wheat straw was 94.65 %. Furthermore, the recovery rate of -TsOH was 98.23 %. It is noteworthy that the hydrolysate can be used for microbial fermentation without detoxification, and the fermentation efficiency is comparable to synthetic medium. All in all, this study provides a reliable, low-cost, and recyclable pretreatment technology for the efficient utilization of lignocellulose.

中文翻译：

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可回收低浓度对甲苯磺酸预处理麦秆生产发酵糖


酸性水溶助长剂预处理因其能有效分离木质纤维素而受到广泛关注。然而，目前的酸性水溶助长剂预处理需要大量的水溶助长剂，且其回收需要较高的能耗。在这项研究中，使用低浓度的甲苯磺酸（-TsOH）对麦秆进行预处理，以最大限度地提高可发酵糖的产量。通过超交联树脂回收水解产物中的-TsOH。结果表明，在最佳预处理条件（1%-TsOH、反应温度140℃、反应时间1.5 h）下，预处理后的麦秆木糖收率为85.66%，酶解纤维素转化率为94.65%。此外，-TsOH的回收率为98.23%。值得注意的是，水解液无需解毒即可用于微生物发酵，发酵效率与合成培养基相当。总而言之，本研究为木质纤维素的高效利用提供了一种可靠、低成本、可回收的预处理技术。