Bioenergy future depends on an increased share of renewable energy, especially in developing countries. Bioconversion of lignocellulosic based biomass to ethanol is significantly hindered by the structural and chemical complexity of biomass, which makes these materials a challenge to be used as feed stocks for cellulosic ethanol production. Bioethanol is one of the most important alternative renewable energy sources that substitute the fossil fuels. Wastepaper has a content of cellulose and hemicelluloses, which make it suitable as fermentation substrate when hydrolyzed. The objective of this work is ethanol production from wastepaper by fermentation process. Eight laboratory experiments were conducted to produce bioethanol from wastepaper. By using Design Expert 7 software, it was formulated the dilute acid hydrolysis step to investigate the effects of hydrolysis parameters on yield of ethanol and optimum condition. All the three hydrolysis parameters were significant variables for the yield of ethanol. The optimum combinations of the three factors chosen for optimum ethanol yield 10.86 ml/50 g sample were 92.59℃ hydrolysis temperature, 30 minutes hydrolysis time and 1%v/v acid concentration.
展开▼
机译：生物能源的未来取决于可再生能源份额的增加，尤其是在发展中国家。生物质的结构和化学复杂性严重阻碍了木质纤维素基生物质向乙醇的生物转化，这使这些材料成为用作纤维素乙醇生产原料的挑战。生物乙醇是替代化石燃料的最重要的可替代可再生能源之一。废纸含有一定含量的纤维素和半纤维素，使其在水解时适合用作发酵底物。这项工作的目的是通过发酵过程从废纸生产乙醇。进行了八次实验室实验，从废纸生产生物乙醇。通过使用Design Expert 7软件，制定了稀酸水解步骤，以研究水解参数对乙醇收率和最佳条件的影响。所有这三个水解参数都是乙醇收率的重要变量。为获得最佳乙醇产量10.86 ml / 50 g样品，选择的三个因素的最佳组合为92.59℃水解温度，30分钟水解时间和1％v / v酸浓度。
展开▼
