NOVELTY - A portable device for the batch transesterification of animal- and plant-derived glycerides in small scale comprises a mounting frame, a main vessel (1) used for transesterification and washing, a circulation and piping system, an alcohol and catalyst mixing system, a facultative cleaning system under various combinations, and a facilitative spill containment system (2). The main vessel includes hearing elements (5) or other source of heat. The circulation and piping system includes transparent pipes and/or tubing mounted vertically on the side of the primary vessel.    USE - For the transesterification of animal- and plant-derived glycerides for small scale production of transesterified fatty acid alkyl esters, such as fatty acid methyl esters for use as biodiesel and value added products.    ADVANTAGE - The portable device allows for the economic production of fatty acid alkyl esters in small scale and portable equipment which transesterifies various glycerides including waste vegetable oil, animal fats and/or virgin vegetable oil. The portable device for the batch transesterification of glycerides into fatty acid alkyl esters, particularly fatty acid methyl esters, in a small scale system in the range of 50-500 l, permits the economic production of fatty acid alkyl esters for various uses, including biodiesel.    DETAILED DESCRIPTION - A portable device for the transesterification of animal- and plant-derived glycerides in small scale batches of 50-500 l, comprises a mounting frame, a main vessel (1) used for transesterification and washing, a circulation and piping system, an alcohol and catalyst mixing system, a facultative cleaning system under various combinations, and a facilitative spill containment system. The main vessel includes hearing elements or other source of heat. The circulation and piping system includes transparent pipes and/or tubing mounted vertically on the side of the primary vessel for dual use in the circulation of the feedstock and/or biodiesel as well as a manometer and which permits visual assessment of phase separation which takes place during transesterification of glycerides. The device includes transparent pipes and/or tubing which are mounted below the reaction tank which permits to discriminate between the glycerin and fatty acid alky ester phases and the physical separation of the former and permits the elimination of the latter through gravimetry and or with the aide of a pump; a filtration unit which is mounted inside the main reservoir and permits the filtration of residues which may be contained in the feedstock; an electrical console for the control of electrical equipment which is associated with subcomponents of device; and a support stand and base which permits to hold subcomponents of the device in a single skid with a low footprint and which may be fitted with handles for easy handling and/or transport.    DESCRIPTION OF DRAWING(S) - The figure shows a side elevational view of the device.    Primary vessel (1)    Reservoir (2)    Pump (4)    Heating elements. (5)