A large amount of corn stover waste is produced from processing industries. In this study, the thermostatic microwave-assisted alkali pretreatment (TMAAP) of corn stover at atmospheric pressure was investigated to improve the utilization rate. The optimized conditions include pretreated time, NaOH concentration, temperature, initial power, and solid-liquid ratio. The pretreated corn stover samples for the enzymatic hydrolysis were studied on the crystallinity, surface microstructural changes, functional group changes and compositional analysis. The results showed cellulose recovery and lignin removal in the solid residue reached 87.39 % and 87.59 %, respectively when the corn stover was subjected for 45 min at a microwave reactor with an initial 600 W, 100 °C and 5 % NaOH. After TMAAP, the enzyme hydrolysis efficiency of the corn stove reached 85.40 %, which was higher than that of the untreated (59.96 %). The experiment can be carried out at atmospheric pressure without strict conditions. The techno-economic analysis predicts revenue of 22.82 USD by processing 100 kg of waste corn stover combined with enzyme cost analysis. To conclude, glucose (26.37 kg) and xylose (1.19 kg) were produced from corn stover (100 kg, 39.31 % glucan, 17.34 % xylan, 23.60 % lignin). The results can give insights into establishing an efficient alkali pretreatment of corn stove waste to produce glucose.

中文翻译：

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常压恒温微波辅助预处理玉米秸秆强化糖化


加工业产生大量玉米秸秆废物。本研究对玉米秸秆在常压下进行恒温微波辅助碱预处理（TMAAP）进行研究，以提高玉米秸秆的利用率。优化的条件包括预处理时间、NaOH浓度、温度、初始功率和固液比。研究了酶解预处理的玉米秸秆样品的结晶度、表面微观结构变化、官能团变化和成分分析。结果表明，当玉米秸秆在初始功率 600 W、100 °C、5% NaOH 的微波反应器中反应 45 分钟时，固体残渣中的纤维素回收率和木质素去除率分别达到 87.39% 和 87.59%。经过TMAAP处理后，玉米炉的酶解效率达到85.40%，高于未处理的酶解效率（59.96%）。该实验可以在大气压下进行，没有严格的条件。技术经济分析结合酶成本分析，预计处理 100 公斤废弃玉米秸秆的收入为 22.82 美元。总之，葡萄糖（26.37 千克）和木糖（1.19 千克）由玉米秸秆（100 千克，39.31 % 葡聚糖，17.34 % 木聚糖，23.60 % 木质素）生产。这些结果可以为建立玉米炉废物的有效碱预处理以生产葡萄糖提供见解。