vegetable oil due to its reduced raw material cost. Restaurant waste oils and rendered animal fats are less expensive than food grade soybean oil [2]. Currently, all these waste oils are sold commercially as animal feed. But the European Union (EU) has
put a ban since 2002 on feeding this mixtures to animal. The reason being, during frying many harmful compounds are formed and if the waste cooking oil is used as an additive to feeding mixtures for domestic animals then it would result in the return of harmful compounds back into the food chain through the animal meat [3]. Production of biodiesel from waste cooking oil is one of the better ways to utilize them efficiently and economically. Looking at the requirement of diesel fuel and availability of waste cooking oil, the biodiesel obtained from waste cooking oil can replace diesel fuel partially. In Canada,approximately 120,000 tonnes of yellow grease is produced per
year [4]. Hence, a substantial amount of biodiesel fuel can be prepared from waste cooking oil, which would partly decrease the dependency on petroleum based fuel.