However, to date, little empirical work has been conducted in the area of composition characteristics of waste
cooking oil and its feasibility of being synthesized to biodiesel. Among these pretreatment methods of KW, thermal hydrolysis is one of the most studied pretreatment methods and has already been applied at industrial scale and is frequently used as a pretreatment method for improving the properties of organic waste to promote the solubilisation of particulate organics and promotion