A key factor about the use of lignocellulosic materials to produce bioethanol is the pretreatment
step, because the lignocellulosic materials are not easily hydrolyzed by the
enzymes if their crystalline structure and the lignin seal are not destroyed before. In this
work the treatment of white office paper by means of the Liquid Hot Water (LHW)
pretreatment is investigated. Effects of LHW are examined in a laboratory plant, with
respect to the solids dissolution and sugar yields after enzymatic treatment.