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以速生杨木为原料,采用微波对杨木进行预处理,并用酵母发酵制备乙醇。探讨了微波功率、酵母用量、发酵时间及发酵温度对乙醇产率的影响。采用响应面法建立二次回归模型,并对发酵工艺进行了优化。研究结果表明,微波处理能有效的促进水解,提高乙醇的浓度。在微波功率540 W、发酵温度33.5℃、时间94 h、酵母的用量0.32%时,乙醇的浓度可达11.02%。
Poplar as raw material, using poplar pretreatment, and yeast fermentation ethanol. The effects of microwave power, yeast dosage, fermentation time and fermentation temperature on the yield of ethanol were discussed. The response surface method was used to establish the quadratic regression model and the fermentation process was optimized. The results show that microwave treatment can effectively promote the hydrolysis, increase the concentration of ethanol. When the microwave power was 540 W, the fermentation temperature was 33.5 ℃, the time was 94 h and the yeast dosage was 0.32%, the concentration of ethanol reached 11.02%.