A comparison between lime and alkaline hydrogen peroxide pretreatments of sugarcane bagasse for ethanol production
A comparison between lime and alkaline hydrogen peroxide pretreatments of sugarcane bagasse for ethanol production
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DOI：
10.1007/s12010-008-8200-9
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发表时间：
2008-01-01
影响因子：
3
通讯作者：
Costa, Aline C.
中科院分区：
文献类型：
--
作者：
Rabelo, Sarita C.;Maciel Filho, Rubens;Costa, Aline C.
对用石灰（氢氧化钙）或碱性过氧化氢预处理甘蔗渣的工艺进行了评价和比较。使用 2 x 2 x 2 因子设计进行分析，以预处理时间、温度、石灰负载和过氧化氢浓度为因子。评估的反应是酶水解后预处理的甘蔗渣中释放的总还原糖（TRS）和葡萄糖的产量。使用来自酒精/糖厂的甘蔗渣进行实验，甘蔗渣的尺寸范围为 0.248 至 1.397 毫米（12-60 目）。结果表明，当对己糖和戊糖感兴趣时，应选择石灰作为预处理剂，因为在 70 摄氏度下使用 0.40 克石灰/克干生物质 36 小时，未筛选的甘蔗渣可以获得高 TRS 产率。当感兴趣的产品是葡萄糖时，通过对筛选的甘蔗渣进行石灰预处理可以获得最佳结果。然而，碱性过氧化物和石灰预处理未经筛分的甘蔗渣的结果差别不大。对用石灰（氢氧化钙）或碱性过氧化氢预处理甘蔗渣的程序进行了评价和比较。使用 2(3) 因子设计进行分析，以预处理时间、温度、石灰负载和过氧化氢浓度为因子。评估的反应是酶水解后预处理的甘蔗渣中释放的总还原糖（TRS）和葡萄糖的产量。使用来自酒精/糖厂的甘蔗渣进行实验，甘蔗渣的尺寸范围为 0.248 至 1.397 毫米（12-60 目）。结果表明，当关注己糖和戊糖时，应选择石灰作为预处理剂，因为在 70 ℃ 下使用 0.40 g 石灰/g 干生物质 36 小时，未筛选的甘蔗渣可获得高 TRS 产率。当感兴趣的产品是葡萄糖时，通过对筛选的甘蔗渣进行石灰预处理可以获得最佳结果。然而，未经筛选的甘蔗渣的碱性过氧化物和石灰预处理的结果差别不大。
Pretreatment procedures of sugarcane bagasse with lime (calcium hydroxide) or alkaline hydrogen peroxide were evaluated and compared. Analyses were performed using 2 x 2 x 2 factorial designs, with pretreatment time, temperature, and lime loading and hydrogen peroxide concentration as factors. The responses evaluated were the yield of total reducing sugars (TRS) and glucose released from pretreated bagasse after enzymatic hydrolysis. Experiments were performed using the bagasse as it comes from an alcohol/sugar factory and bagasse in the size range of 0.248 to 1.397 mm (12-60 mesh). The results show that when hexoses and pentoses are of interest, lime should be the pretreatment agent chosen, as high TRS yields are obtained for nonscreened bagasse using 0.40 g lime/g dry biomass at 70 degrees C for 36 h. When the product of interest is glucose, the best results were obtained with lime pretreatment of screened bagasse. However, the results for alkaline peroxide and lime pretreatments of nonscreened bagasse are not very different.Pretreatment procedures of sugarcane bagasse with lime (calcium hydroxide) or alkaline hydrogen peroxide were evaluated and compared. Analyses were performed using 2(3) factorial designs, with pretreatment time, temperature, and lime loading and hydrogen peroxide concentration as factors. The responses evaluated were the yield of total reducing sugars (TRS) and glucose released from pretreated bagasse after enzymatic hydrolysis. Experiments were performed using the bagasse, as it comes from an alcohol/sugar factory and bagasse, in the size, range from 0.248 to 1.397 mm (12-60 mesh). The results show that, when hexoses and pentoses are of interest, lime should be the pretreatment agent chosen, as high TRS yields are obtained for non-screened bagasse using 0.40 g lime/g dry biomass at 70 degrees C for 36 h. When the product of interest is glucose, the best results were obtained with lime pretreatment of screened bagasse. However, the results for alkaline peroxide and lime pretreatments of non-screened bagasse are not very different.