Bioethanol production from hydrothermally pretreated Eucalyptus globulus wood

Comparison of Dilute Acid, Alkali, and Biological Pretreatments for Reducing Sugar Production from Eucalyptus

“…The results are comparable to the data shown by Romaní et al (2010). The compositions of Eucalyptus obtained from different regions were similar, which mainly consisted of cellulose (44.40% to 45.51%), hemicellulose (21.85% to 25.12%), lignin (27.70% to 29.07%), and a minimal amount of extractives.…”

Second-generation bioethanol from industrial wood waste of South American species

“…Ethanol yields in the case of eucalyptus are usually high, without differences among materials subjected to acid hydrolysis or delignification. Based on the data reported in the selected works tabulated in Table 4, an ethanol yield of 86.4% was obtained by the SSF of a hydro-thermally pretreated material at 230°C (Romaní et al, 2010) and 92% was obtained with an SHF process using a material pretreated by diluted acid (McIntosh et al, 2012). Furthermore, the ethanol yield of the SSF of a kraft pulp was 96% (Monrroy et al, 2012) while that of an organosolv-pretreated pulp stood at 91.1% (Romaní et al, 2011).…”

Biorefinery processes for the integral valorization of agroindustrial and forestal wastes Procesos de biorrefinería para la valorización integral de residuos agroindustriales y forestales

“…As shown in Supplementary Table 4, these conditions are not the same. In case of hardwoods, more severe autohydrolysis conditions, up to 2508C, do not produce improvements in cellulose to glucose conversion, as it begins to degrade the cellulose during the autohydrolysis (Romanı´, Garrote, Alonso, & Parajo´, 2010a).…”

“…Simultaneous saccharification and fermentation (SSF) assays carried out with solid residue of E. globulus wood show that autohydrolysis conditions of 2308C result in the best bioethanol concentration and conversion, with an optimum value of 86.4% of cellulose to ethanol conversion (Romanı´et al, 2010a). In order to improve the compatibility among hemicellulose-derived compounds in liquid phase and good bioethanol conversion of solid phase, the treatment of solid residue from autohydrolysis with sodium hydroxide, in the processing of Acacia dealbata (Ya´n˜ez, Romanı´, Garrote, Alonso, & Parajo´, 2009), or with organosolv using ethanol/water solutions, with E. globulus (Romanı´, Garrote, Lo´pez, & Parajo´, 2011), has been investigated.…”