Acid and alkaline catalysts can be used in the form of homogeneous or heterogeneous catalysts for transesterification process (Pereira et al., 2007). Research and industry prefer alkali catalysts, such as NaOH and KOH because alkali catalysts react faster and are less corrosive than acidic compounds (Pinto et al., 2005). High water and free fatty acid in oil reduce the effectiveness of catalysts, produce soap and require considerable amounts of catalysts. Free fatty acids (FFAs) and water in oil needs to be removed before applying base catalysis process. Marchetti et al