TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The reactor comprises a system of two reactors: a transesterification reactor; and an esterification reactor. The apparatus further comprises: a heat exchanger, where the discharge line carrying the fuel from the reactor and the feed line carrying the mixture to be fed into the reactor, run through the heat exchanger, so as to extract heat from the discharge line and add heat to the feed line; a conduit for carrying intermediate fuel from the discharge port of the transesterification reactor to the inlet port of the esterification reactor; a pressure regulator for each of the at least two reactors, where the feed line introduces the mixture into the transesterification reactor and the pressure regulator ensures that the alcohol at each stage of the process is maintained in a supercritical state; a mixer for mixing glycerin with the mixture; and a glycerin removal chamber comprising a grounded housing, an electrostatic probe, and a drain that is electrically operated to open when glycerin makes contact with a lower end of the electrostatic probe, where glycerin absorbs excess water from the mixture and the glycerin and excess water both are drained from the glycerin removal chamber, when the drain is opened; a solid-acid-catalyst processor, where the fuel that is discharged from the reactor is processed through the processor, to remove excess free fatty acids from the fuel; and a means for converting water to steam and the reactor further comprises a steam discharge port, where the steam is removed from the reactor via the steam discharge port. In the apparatus, the means for converting water to steam is a heater or a pressure regulator.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method further comprises: adding glycerin to the mixture, to remove excess water; passing the fuel through a final esterification process comprising a solid acid catalyst, so as to remove excess free fatty acids from the fuel; providing a heat exchanger for removing heat from the discharged fuel and using the heat obtained from the fuel to raise the temperature of the mixture, prior to feeding the mixture into the reactor; maintaining flow communication between the two reactors by means of a fluid conduit that transports an intermediate fuel from the transesterification reactor to the esterification reactor; providing a pressure regulator in each of the two reactors; providing a steam discharge port in the esterification reactor: vaporizing water in the intermediate fuel; discharging the vaporized water from the esterification reactor through the steam discharge port; maintaining different pressures in the two reactors, where the water is vaporized by means of maintaining sufficiently high pressure in one of the two reactors, so as to cause the water to flashover to vapor; providing a heater in one of the two reactors and maintaining the same pressure in the two reactors, where the water is vaporized by raising the temperature of the water to the boiling point and discharging the vaporized water from the esterification reactor through the steam discharge port; providing a mixer and a glycerin removal chamber in the fluid conduit between the transesterification reactor and the esterification reactor; adding glycerin into the mixer; allowing the glycerin to absorb water from the mixture in the mixer; removing the glycerin with absorbed water from the mixer; separating excess alcohol from the fuel that is discharged from the reactor; and converting water to steam and removing the steam from the reactor via a steam discharge port. EXAMPLE - No suitable example given.