Pretreatment of sugarcane top leaves by ozonation as a promotion of susceptibility to hidrolysis

F. Ogando, J. A. S. Sartori, N. T. C. Magri, C. L. Aguiar
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引用次数: 2

Abstract

Studies about Ozone (O 3 ) application in sugarcane residues for ethanol production are ongoing. This study was undertaken to evaluate the use of ozone as a pretreatment to facilitate hydrolysis of sugarcane top leaves. In the first experimentation, sugarcane top leaves were subjected to ozone (62.37 mg O 3 min -1 over a three hour period) and water only (control). Following ozonation, the material was separated into a liquid and solid fraction. The analysis of liquid fraction showed that phenolic concentration and soluble solids did not vary. However, there was a decrease in pH and an increase in reducing sugars. This treatment increased saccharification. During the second treatment, ozone was added by direct infusion in a suspension of sugarcane top leaves and distilled water at a ratio of 1:10 (w.v -1 ).  Additionally, the lignocellulosic analysis showed a positive relationship between the dose of ozone and decomposition of lignin and an increase in the proportion of cellulose and hemicellulose in the material. All aspects are good signs for the use of ozone in pretreatment of lignocelullosic feedstocks.
臭氧化预处理甘蔗顶叶对水解敏感性的促进作用
臭氧(o3)在甘蔗残渣中用于乙醇生产的研究正在进行中。本研究旨在评价臭氧作为预处理对甘蔗顶叶水解的促进作用。在第一次实验中,甘蔗顶叶只受到臭氧(62.37 mg O 3 min -1, 3小时)和水(对照)的影响。臭氧化后,物料被分离成液体和固体部分。液体组分分析表明,酚类物质含量和可溶性固形物含量没有变化。然而,pH值下降,还原糖增加。这种处理增加了糖化。在第二次处理中,以1:10 (w.v -1)的比例将臭氧直接注入甘蔗顶叶与蒸馏水的悬浮液中。此外,木质纤维素分析表明,臭氧剂量与木质素分解和材料中纤维素和半纤维素比例的增加呈正相关。所有方面都是使用臭氧预处理木质纤维素原料的良好迹象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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