Valorization of Used Frying Oil Through Biodiesel Synthesis

The increase in the world's population has led to an increase in the development of food processing industries. These industries generate huge amounts of organic waste which is mainly composed of triglycerides. This waste can be converted into biofuel for engines. The conversion of these wastes into biodiesel is very promising due to its compatibility with diesel engines and its characteristics very close to diesel. In the present work, waste cooking oil is considered as an energy source for diesel engines. For this purpose, we used transesterification as a process to valorize this waste into biofuel, and then we compared it with conventional diesel. The analysis of the results obtained showed that our biodiesel, obtained from the valorization of edible frying oils, has a positive impact on the environment. Nevertheless, it turned out to be a non-compliant product due to its behaviour towards the engine, so its use in its pure state (B100) as a transport fuel cannot be implemented due to many serious concerns. The result is that a mixed diesel-ester system as a fuel is required.