论文部分内容阅读
丁醇是分子式为C4H9OH的一种饱和脂肪醇,它是一种可以运输的燃料,也是各种化学应用中的媒介和溶剂。20世纪50年代以前,丙酮丁醇梭杆菌发酵生产丙酮丁醇溶剂一直是工业上的标准方法。现代微生物的技术已经改造了生产菌,使之能够产出更高纯度的丁醇,而不是产出以前那种混合溶剂。丁醇作为一种可替代燃料能源有许多的优势:(1)更高的能量。(2)能够在现有管道中运输使用。(3)容易和汽油相互混合。丁醇能够从甘蔗汁,糖蜜或蔗渣水解液中的糖中生产出来,这主要是通过一系列拜式梭菌发酵而实现的。甘蔗汁和糖蜜能够直接发酵生成丁醇。糖蜜发酵丁醇的产量为0.30g/g,甘蔗汁发酵丁醇的产量为0.34g/g,而等量的蔗糖浓度下每克蔗糖产出0.27克丁醇。从经济学角度来看,从甘蔗产品中生产丁醇的方法是可行的。
Butanol, a saturated fatty alcohol of molecular formula C4H9OH, is a transportable fuel and a vehicle and solvent for various chemical applications. Until the 1950s, the fermentation of C. acetobutylicum to produce acetone butanol solvent has been the industry standard method. The technology of modern micro-organisms has transformed the producer bacteria to produce higher-purity butanol than to produce the former mixed solvent. Butanol has many advantages as an alternative fuel source: (1) higher energy. (2) can be transported in the existing pipeline use. (3) Mix easily with gasoline. Butanol can be produced from sugars in sugarcane juice, molasses or bagasse hydrolyzate, primarily through a series of Clostridium perfringens fermentation. Sugarcane juice and molasses can be directly fermented to produce butanol. The yield of butanol by molasses fermentation was 0.30 g / g, the butanol yield by sugarcane juice was 0.34 g / g, and 0.27 g of butanol per gram of sucrose at the same sucrose concentration. From an economic point of view, it is feasible to produce butanol from sugarcane products.