NOVELTY - Manufacturing a biofuel by a transesterification process, comprises: (a) providing an alcohol source; (b) providing a triglyceride source; (c) mixing together a triglyceride and an alcohol to form a reaction mixture; (d) transferring the reaction mixture to at least a distal pre-heater (24) to heat the mixture; (e) transferring the pre-heated reaction mixture to a reactor (36) to form (i) a liquid biofuel and (ii) a glycerin and excess alcohol gaseous mixture; (f) collecting the so-produced biofuel; (g) collecting the glycerin; and (h) recycling the excess alcohol.    USE - The method is useful for manufacturing a biofuel (biodiesel fuels) by a transesterification process.    ADVANTAGE - The method is a continuous process. The excess reactants can be recycled and reused, hence the process is an improved process for the production of biodiesel fuel. The method enables a 95% of conversion rate.    DETAILED DESCRIPTION - Method for manufacturing a biofuel by a transesterification process comprises: (a) providing an alcohol source; (b) providing a triglyceride source; (c) mixing together a triglyceride and an alcohol to form a reaction mixture; (d) transferring the reaction mixture to at least a distal pre-heater (24) to heat the mixture to a temperature below 180 degrees C and at a pressure of below 1450 psi; (e) transferring the pre-heated reaction mixture to a reactor (36) maintained at a temperature of greater than 180 degrees C and at a pressure greater than 1450 psi to form (i) a liquid biofuel and (ii) a glycerin and excess alcohol gaseous mixture; (f) collecting the so-produced biofuel; (g) collecting the glycerin; and (h) recycling the excess alcohol to the alcohol source. INDEPENDENT CLAIMS are included for:    (1) a method for manufacturing a biofuel by a transesterification process, comprising: steps (a) and (b) as above per se; transferring an alcohol to at least a distal pre-heater to heat the alcohol to a temperature below 180 degrees C and at a pressure of below 1450 psi; and steps (c)-(h) as above per se; and    (2) a mobile unit assembly for manufacturing a biofuel by a transesterification reaction of a triglyceride and a stoichiometric excess of an alcohol, where the reaction is carried out at a supercritical state, comprising: a platform having substantially planar upper and lower surfaces; a structural support comprising a many pillars and struts, where the pillars extends upwardly from the platform, and the struts extends between the pillars, and the pillars and struts are secured to each other at their respective intersections; an apparatus for manufacturing the biofuel, where the apparatus comprises a source of an alcohol, a source of a triglyceride, at least one flash drum, at least one pre-heater, and a reactor, where the apparatus is secured to the structural support such that the apparatus is braced for transport from one location to another.    DESCRIPTION OF DRAWING(S) - The figure shows the apparatus for performing the process.    Feed tank (12)    Distal pre-heater (24)    Second intermediate pre-heater (32)    Proximal pre-heater (34)    Reactor or Furnace. (36)