以蔗渣为原料,采用超声波进行预处理.然后发酵制备木糖醇.探讨了超声波预处理功率、预处理初始pH值、预处理时间及液固比对木糖醇得率的影响.采用响应面法建立二次回归模型,并对预处理工艺进行了优化.结果表明,超声波预处理能有效地促进蔗渣的降解,提高木糖醇的得率.当预处理功率为450W、pH值为3.9、时间为41 min、液固比为20:1(mL:g)时,木糖醇的得率最高.比相同条件下未进行超声波预处理的试样提高了很多.%Xylitol was made from bagasse by ultrasonic pretreatment and fermentation. The effects of ultrasonic power, initial pH value and time of pretreatment and liquid-solid ratio on xylitol yield were discussed. The pretreatment process was optimized and analyzed by response surface methodology, and quadratic regression model was established. The results showed that ultrasonic pretreatment could promote bagasse degradation and increase xylitol yield. The xylitol yield was increased when pretreatment ultrasonic power was 450W, pretreatment initial pH value was 3.9, liquid-solid ratio was 20∶1(mL∶g); and pretreatment time was 41 min.
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