汽爆甘蔗渣转化乙醇的实验研究

研究了甘蔗渣的汽爆条件,并利用高效液相色谱（HPLC）对甘蔗渣汽爆产物进行了分析。在相同汽爆蒸汽压力下,随着汽爆保压时间的延长,降解产生的对后续酶解和发酵有害的物质甲酸、乙酸和糠醛等也随之增加。研究了汽爆甘蔗渣的酶解和发酵性能,在实验室小试的基础上,进一步利用50 L发酵罐进行放大的酶解和发酵实验,在酶解液固形物浓度27.09%（ω）条件下,48 h发酵液乙醇浓度6.17%（φ）,显示汽爆甘蔗渣能够较好地被转化用于生产乙醇。

Experimental Study on Ethanol Production from Steam-Exploded Sugarcane Bagasse

Steam explosion conditions of sugarcane bagasse were studied,and sugarcane bagasse products after steam explosion pretreatment were identified by HPLC. At the same pressure of the steam explosion,the degraded products were harmful to enzymatic hydrolysis and fermentation creased with extension of pressure holding time. Based on the laboratory research,scale-up fermentation experiments in 50 L fermentor were further carried out. After 48 h fermentation,ethanol concentration 6. 17%（ φ） was obtained with 27. 09%（ ω） solid concentration of hydrolysate,indicating that sugarcane bagass was suitable for conversion into ethanol.