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Biorefining strategy for maximal monosaccharide recovery from three different feedstocks: eucalyptus residues, wheat straw and olive tree pruning
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Advisor(s)
Abstract(s)
This work proposes the biorefining of eucalyptus residues (ER), wheat straw (WS) and olive tree pruning (OP) combining hydrothermal pretreatment (autohydrolysis) with acid post-hydrolysis of the liquid fraction and enzymatic hydrolysis of the solid fraction towards maximal recovery of monosaccharides from those lignocellulose materials. Autohydrolysis of ER, WS and OP was performed under non-isothermal conditions (195–230 C) and the non-cellulosic saccharides were recovered in the liquid fraction while cellulose and
lignin remained in the solid fraction. The acid post-hydrolysis of the soluble oligosaccharides was studied by optimizing sulfuric acid concentration (1–4% w/w) and reaction time (10–60 min), employing a factorial (22) experimental design. The solids resulting from pretreatment were submitted to enzymatic hydrolysis by applying commercial cellulolytic enzymes Celluclast1.5 L and Novozyme 188 (0.225 and 0.025 g/g solid, respectively). This strategy provides high total monosaccharide recovery or high glucose recovery from
lignocellulosic materials, depending on the autohydrolysis conditions applied.
Description
Keywords
Lignocellulosic biomass Autohydrolysis Enzymatic hydrolysis Biorefinery Eucalyptus residues Wheat Straw Olive residues
Citation
Silva-Fernandes, T.; Duarte, L.C.; Carvalheiro, F.; [et.al.]. - Biorefining strategy for maximal monosaccharide recovery from three different feedstocks: eucalyptus residues, wheat straw and olive tree pruning. In: Bioresource Technology, 2015, Vol. 183, 203-212
Publisher
Elsevier