Bioethanol production from hydrothermally pretreated Eucalyptus globulus wood

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• 作者：Aloia Romaní ; Gil Garrote ; José ; Luis Alonso ; Juan Carlos Parajó
• 关键词：Autohydrolysis ; Enzymatic hydrolysis ; SSF ; Eucalyptus globulus ; Bioethanol
• 刊名：Bioresource Technology
• 出版年：2010
• 出版时间：November 2010
• 年：2010
• 卷：101
• 期：22
• 页码：8706-8712
• 全文大小：367 K

文摘

Eucalyptus globulus wood samples were pretreated in aqueous media under non-isothermal conditions to reach maximal temperatures (T_MAX) in the range 195–250 °C, in order to assess the effects of the pre-treatment severity on the fractionation of wood and on the susceptibility of processed samples toward enzymatic hydrolysis. Both the fraction of cellulose susceptible to hydrolysis and the hydrolysis rate increased with the severity of the pre-treatments, but the overall glucose yield decreased for substrates pretreated at T_MAX above 220 °C owing to cellulose losses. Using substrates pretreated at T_MAX = 220 °C, up to 94 % of polysaccharides were recovered in the hydrolysis media as mono- or oligo-saccharides. High glucose to ethanol conversions were obtained operating at low enzyme charges in Simultaneous Saccharification and Fermentation mode.