未脱毒汽爆玉米秸秆高底物浓度的同步糖化和乙醇发酵

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为取消蒸汽爆破预处理玉米秸秆水洗脱毒步骤和提高乙醇发酵的乙醇浓度,利用专利菌株酿酒酵母Y5,对蒸汽爆破预处理玉米秸秆不经脱毒处理,直接进行同步糖化和发酵(SSF).蒸汽爆破玉米秸秆的浓度30%,同步糖化和发酵的时间96 h,100 mL、3000 mL反应器和5L发酵罐的乙醇浓度分别达到50.0、47.8、47.5 g/L.研究结果表明,菌株Y5在纤维素乙醇生产中对简化生产工艺、降低设备投资、减少水消耗、降低生产成本具有重要的应用前景.
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