在木质纤维素利用研究领域,高浓度还原糖的获得是实现其能源转化的基础.基于Box-Behnken试验设计,选取维压时间、蒸汽压强和碳酸氢铵浓度为主要影响因素,采用响应面分析法优化了玉米秸秆蒸汽爆破预处理的工艺条件,并建立了工艺数学模型.结果表明:最佳蒸汽爆破预处理条件维压时间 227 s,蒸汽压强3.08 MPa,碳酸氢铵2.11％.爆破后的物料经48 h糖化,还原总糖浓度达到60.04 g/L,糖化率达到理论值(71.7 g/L)的83.7％,并验证了数学模型的有效性.试验结果表明蒸汽爆破预处理可以有效提高还原糖浓度.%In the research fields of lignocellulosic materials, their high-concentration reducing sugars production is an important foundation for their energy conversion. Based on Box-Behnken design, maintenance pressure time, steam pressure and ammonium acid carbonate concentration were chosen as the three important factors with three levels. The process conditions of corn stalk steam explosion pretreatment were optimized by response surface methodology, and a mathematical model of a second order quadratic equation was developed for reducing sugar concentration. The results showed that the optimized technological parameters were as follows: maintenance pressure time 227 s, steam pressure 3.08 Mpa, ammonium acid carbonate concentration. 11%. Corn stalk steam explosion pretreatment was saccharified under these conditions for 48h, its reducing sugar concentration was up to 60.04 g/L, and saccharification rate reached 83.7% of its theoretical value(71.7 g/L). The results verified the validity of the mathematical model. This study demonstrates that steam explosion pretreatment can significantly improve reducing sugar concentration .
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