木薯酒精渣同步糖化发酵制乙醇的工艺研究

Process research of using Cassava alcohol residue as material to produce ethanol by SSF

研究了利用木薯酒精厂废渣为原料发酵生产乙醇的方法,结果表明:经过简单的机械粉碎后,通过同步糖化发酵生产乙醇是可行的。发酵条件为:木薯酒精渣经粉碎后取粒径小于0.85mm的部分,初始料水比1∶8,纤维素酶添加量为每克木薯渣(干重)30FPU,发酵过程中在24h内分批将剩余木薯渣加入至总料水比达到1∶2.5,利用5L发酵罐进行同步糖化发酵,发酵液中乙醇质量浓度达到52g/L,木薯酒精渣到乙醇的收率达到13%。纤维素酶的添加量对发酵效果影响显著,当达到每克木薯渣(干重)50FPU时,发酵液中乙醇质量浓度可达65g/L,乙醇收率达到16%。

In this article, the process of using Cassava alcohol residue as material to produce ethanol was studied,the result showed that the way of Cassava alcohol residue simple smashed and by SSF to produce ethanol was feasible. It was suggested that when using the following process.Cassava alcohol residue as raw material,which the particle diameter less than 0. 85 mm,the initial solid-liquid ratio 1. 8, cellulase dosage at 30FPU/g residue（DM）, feeding Cassava alcohol residue to solid-liquid ratio 1 ： 2. 5 in 24 h, the ethanol concentration reached to 52 g/L in 5 L fermentor by SSF and the yield was 13 %. The result also showed that the dosage of cellulase was more effective for ethanol fermentation. when the cellulase dosage was at 50 FPU/g residue（DM）, the ethanol concentration reached to 65 g/L and the yield was 16%.