以降解白酒丢糟中的可降解多糖转化为燃料酒精为目的,通过初步研究浓硫酸对白酒丢糟中的粗纤维及粗淀粉的二次降解发现,得出干丢糟转化为还原糖的降解条件为:70%(m/m)的H2SO4与干丢糟按7:5的体积质量比混合,糊化30min,然后加水使硫酸的浓度稀释成22%(m/m)左右,在85℃的水浴条件下处理混合物1h,干丢糟的降解率可达到0.35g/g.在白酒鲜丢糟的浓硫酸降解放大试验中,用80%H2SO4与鲜丢糟干物质的体积质量比为1:1比例混合,鲜丢糟还原糖降解率亦达到0.33g/g(鲜丢糟干物质计)较高水平.%The degradable polysaccharides in distiller's grains of Chinese liquor could be degraded and converted into fuel ethanol For this purpose,the secondary degradation of raw fiber and raw starch in distiller's grains by H2SO4 was studied. The degradation conditions of dry distiller's grains into reducing sugars were determined. The 70％ H2SO4 and dry distiller's grains were mixed at the ratio of 7:5(v/w) and gelatinize for 30min. Then,the H2SO4 concentration was regulated to 22％(m/m) or so by adding water, followed by water-bath at 85℃ for 1h. After the above treatment, the degradation rate of dry distiller's grains reached 0.35g/g. In the pilot scale test of H2SO4-catalyzed degradation of fresh distiller's grains, the degradation rate of fresh distiller's grains was 0.33g/g(using the dry matter of fresh distiller's grains for calculation) when 80％ H2SO4 and fresh distiller's grains were mixed at the ratio of 1:1 (v/v).
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