Obtaining Fermentable Sugars from a Highly Productive Elm Clone Using Different Pretreatments

The interest of supplying lignocellulosic materials for producing fermentable sugars has recently emerged in order to diminish the negative environmental effects fossil fuels. In this study, Ulmus minor clone Ademuz, characterized its tolerance Dutch elm disease and rapid growth, was evaluated as a source sugars. For that, different pretreatments, comprising autohydrolysis, dilute acid hydrolysis, catalyzed organosolv, alkaline extraction, were at two levels severity (pretreatment temperatures 160 °C 180 °C, except extraction 80 °C); resulting pretreated enzymatically hydrolyzed production. major lignin hemicellulose achieved during organosolv (48.9%, lignin; 77.9%, hemicellulose) hydrolysis (39.2%, 95.0%, enzymatic digestibility (67.7%, organosolv; 53.5% hydrolysis). Contrarily, under most favorable conditions autohydrolysis (180 °C) (160 °C), lower produced (4.8%, 67.2%, hemicellulose, autohydrolysis; 22.6%, 33.1%, extraction), leading (32.1%, 39.2%, extraction). Taking into account solubilized from pretreatment liquors, highest (glucose xylose) yield production (28.1%) per gram biomass U. Ademuz with °C.