| abstract |
The present invention relates to an enzymatic bioprocess for producing hydrolysates with high concentrations of fermentable sugars from lignocellulose-containing materials, such as agricultural and forest waste, pre-treated or in natura . The currents produced, which are rich in sugars, may then be fermented to produce alcohols (ethanol, butanol, xylitol), organic acid and other molecules of interest to the biofuel and petrochemical sectors. The solid lignocellulosic materials are added in large quantities and kept in contact with the enzyme preparations under favourable conditions of pH and temperature, with constant stirring, even during the initial stages of the process, when the raw material is not yet completely liquefied. Throughout the process, lignocellulosic solid materials, enzyme preparations and additives may be added intermittently. |