The removal of lignin from lignocellulosic biomass without affecting its remaining components in high degree using environmentally friendly technologies remains still a challenge step of the biorefinery processes. In order to carry out an integral valorization of the lignocellulosic residues, many authors have employed the delignification as a preliminary step prior to a simultaneous saccharification and fermentation (SSF) for the obtaining of ethanol or other added value chemicals. Nowadays, many delignification procedures have been developed using organic acids, organic solvents, alkali, ionic liquids, microwave-assisted alkali glycerol, inorganic salts or alkaline peroxide, between others (Moodley et al., 2017). However, it is necessary to take into account that the efficiency of the delignification treatment could depend on the nature of lignocellulosic biomass used (Carvalho et al., 2016).
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