固定化酵母的选育及在木薯浓醪发酵生产燃料乙醇中的性能对比

Breeding of Immobilized Yeasts & Comparison of Their Performance in High-gravity Fermentation of Cassava to Produce Fuel Ethanol

对固定化酵母进行选育,得到3株酿酒酵母编号分别为SLS、SYA、SJY和1株自絮凝酵母FJY。以木薯为原料,对固定化酵母浓醪发酵生产燃料乙醇的性能进行对比,结果表明,自絮凝酵母菌株FJY的乙醇生产能力最高,在发酵86 h后,最终酒精分达到15.7%vol,残总糖1.35%,甘油产量比其他3株酵母菌株低20%。

Three S.cerevisiae strains including SLS, SYA and SJY and one self-flocculating yeast strain FJY were obtained though the breeding of immobilized yeasts. Their performance in high-gravity fermenation of cassava to produce fuel ethanol were compared. The results showed that self-flocculating strain FJY had the strongest ethanol-producing capacity among all the four strains. After 86 h fermentation, its final alcohol content could reach up to 15.7 %vol and its residual total sugar content to 1.35 % and its glycerol content was 20 % lower than that of the other three strains.