Ozolysis pretreatment has few advantages, such as; it effectively removes lignin and does not produce toxic residues for the down stream process. The reactions are also carried out at room temperature and pressure (Vidal and Molinier, 1988). However, a large amount of ozone is required, making the process expensive (Sun and Cheng, 2002). In acid hydrolysis, concentrated sulfuric and hydrochloric acids have been used to treat lignocellulosic materials. Although they are powerful agent for cellulose hydrolysis but concentrated acids are toxic, corrosive and hazardous and requires reactors that are resistant to corrosion. In addition, concentrated acid must be recovered after hydrolysis to make the process economically feasible (Sivers and Zacchi, 1995)