The main problems of environmental pollution are mainly in the air and water. In the air, industrial and vehicle emissions have increased the concentration of gases and particulate pollutants in the atmosphere; On the other hand, the degradation of water is caused by the discharge of pollutants between them, the oils that usually come from industrial effluents and from domestic drains, as is the case of used vegetable oils. In the UNT these two environmental problems are caused by the discharge to the drain of 13.8 kg weekly of used vegetable oil. In order to find a solution, it was proposed to take advantage of these discarded oils from the university dining room to produce a clean fuel that could replace diesel. Biodiesel comes from the transesterification of vegetable oils, where the fatty acids that make up the triglycerides (in the presence of a KOH or NaOH catalyst and high tempera...