发酵对新鲜甜玉米秸秆生产乙醇的影响  

Effect of fermention on ethanol production from fresh sweet corn stalks

作　　者：高瑞芳[1] 张建国[1] 

机构地区：[1]华南农业大学农学院农业部能源植物资源与利用重点实验室,广东广州510642

出　　处：《草业学报》2014年第2期154-159,共6页Acta Prataculturae Sinica

基　　金：十二五国家科技支撑计划(2011BAD17B02-05)资助

摘　　要：玉米秸秆资源丰富、廉价,是生产生物乙醇的一个重要资源。本研究以切短的新鲜甜玉米秸秆为原料,利用酵母菌(J)、乳酸菌(R)及纤维素酶(E)3种添加剂,进行J、JR(J+R)、JE(J+E)、JER(J+E+R)、MJ(灭菌后添加J)、MJER(灭菌后添加J+E+R)、CK(对照)处理,在室温下分别密封发酵10,20,30和40d研究新鲜玉米秸秆发酵生产乙醇的适宜发酵时间和添加剂。结果表明,甜玉米秸秆可溶性碳水化合物(WSC)含量随发酵时间延长显著降低,而且J、JR和MJ 3个处理的WSC含量显著低于CK(P<0.05);发酵时间和添加剂对纤维素和半纤维素含量无显著影响(P>0.05);对照及各添加处理都是发酵10d乙醇产量最高,在所有处理中MJ发酵10d效果最好,其乙醇产量达17.89%DM,亦即在室温下甜玉米秸秆灭菌后添加酵母菌发酵10d,其乙醇产量最高。Corn stalks are an important resource that is abundant and cheap for fuel ethanol production. This study took curtal fresh sweet corn stalk as raw material with, yeasts （J）, lactic acid bacteria （R） and cellulase （E） as additives. The additive treatments were： control （no additive）, J, JR （J＋R）, JE （J＋E）, JER （J＋E＋ R）, MJ （J addition after sterilizing） and MJER （JER addition after sterilizing）. The treated materials were sealed, and fermented for 10, 20, 30 and 40 days to study the optimum fermentation time and additives for eth- anol production. The contents of water soluble carbohydrates （WSC） in sweet corn stalk significantly decreased with prolonging of fermentation times and were lower in the J, JR and MJ treatments than in the control （P~ 0.05）. Fermentation time and additives had no significant effect on cellulose and hemicellulose contents. The ethanol yield tended to decrease with fermentation time from 10 to 40 days and was the highest （17.89~//00 DM） under the following conditions： sterilized stalk and adding yeasts, fermenting for 10 d

关 键 词：甜玉米秸秆 发酵 乙醇 

分 类 号：S216.2[农业科学—农业机械化工程]