ABSTRACT
The increasing demand for sustainable energy sources has increased the demand for biodiesel and related subsidiaries where feedstock supply is a significant challenge. Used cooking oil or waste frying oil is one of the major by-products, and the waste oil generated due to the increasing number of eateries, food junctions/parks, and food industries has evolved as a potential feedstock for biodiesel production. This chapter briefly discusses about biodiesel production from different sources, and the specific methods and technologies used for different waste oil sources. The properties of waste oil, both beneficial and unfavorable for biodiesel production, have also been discussed in this chapter. The physicochemical properties and fuel efficiency of the produced biodiesel from different waste oil sources are also briefly discussed.
