Chemical hydrolysis reactor has a total volume of 115 litres and can work at the maximum temperature of about 150°C, with 5 bar maximum pressure and it is equipped with a thermostating system suitable for rapid heating and automatic maintenance of the set temperature. Chemical hydrolysis reactor has dosimetric pumps that allow a fine regulation of the operating pH thank to the addition of an acid or basic solution, the contact of the biomass with a specific acid or basic solution, at a certain temperature, lead to biomass hydrolysation and simple molecules liberation.