NOVELTY - Production of a biodiesel product comprises continuously contacting a triglyceride-containing component with a catalyst and alcohol at an elevated temperature in a centrifugal reactor/separator (10); and continuously separating a less dense phase (72) comprising the biodiesel product from a more dense phase comprising glycerin in the reactor/separator.    USE - Method for producing a biodiesel product (claimed).    ADVANTAGE - The method provides a more efficient reaction and separation process that provides more intimate mixing of reactants and relatively more rapid separation of the reaction product and reactants and impurities from one another. It provides sufficient reaction time to provide relatively higher yields of product.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a biodiesel product manufacturing apparatus comprising    (A) a centrifugal reactor/separator comprising a stationary shell; a rotating hollow cylindrical component in the stationary shell; a residence time-increasing component between the stationary shell and the hollow cylindrical component; a less dense phase outlet in fluid flow communication with an interior cavity of the hollow cylindrical component; and a more dense phase outlet in fluid flow communication with the interior cavity of the hollow cylindrical component;    (B) storage vessels for reactants in fluid flow communication with the centrifugal reactor/separator; and    (C) a pump for pumping reactants from the storage vessel to the centrifugal reactor/separator.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a biodiesel production process.    Centrifugal reactor/separator (10)    Fluid inlets (18, 20)    Fluid outlets (28, 30)    Biodiesel product manufacturing and purification system (60)    Triglyceride feed component (62)    Storage vessel (64, 70)    Positive displacement pump (66, 72)    Alcohol component (68)    Less dense phase (74)    Centrifugal separator (78A)    Wash water (80, 100)    Wash water storage vessel (82)    Pump (84)    Byproduct and impurities (88, 96, 106)    Byproduct storage vessel (90)    Washed product (92)    Purified product (102)    Product storage vessel (104)