TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: In the process (P1), the first alcohol stream is condensed and produces heat that is used to heat the distillation column, where the step of distilling is a continuous operation. In the process (P1), the step of using pressure swing adsorption involves using three molecular sieve units. The process (P1) further involves: compressing the first alcohol stream to a predetermined pressure to produce a compressed alcohol stream; and condensing the first alcohol stream at the predetermined pressure in a heat exchange relationship with the feed stream, where the predetermined pressure is sufficiently high that the compressed alcohol stream vaporizes the feed stream. The first alcohol stream is fed into a biodiesel transesterification reactor. The process (P1) further involves the step of heating the bottoms of the distillation column with the compressed alcohol stream. In the process (P2), the first alcohol stream is condensed and supplies heat to the biodiesel production facility; where the distillation is a continuous operation. The pressure-swing adsorption system comprises three molecular sieve units. The process (P2) further involves: compressing the first alcohol stream to a predetermined pressure; condensing the first alcohol stream in a heat exchanger to vaporize the feed stream, where, the predetermined pressure is sufficient to vaporize the feed stream. The process (P2) further involves: condensing the first alcohol stream in a heat exchanger to supply heat to the distillation column. In the process (P2), the distillation column has a capacity that is less than or equal to the capacity of a pressure swing adsorption system used for the step of using pressure swing adsorption. In the process (P2), the third alcohol stream has a predetermined water content and the process uses the first amount of energy per mole of alcohol in the third alcohol stream and further where the first amount of energy is less than the second amount of energy per mole of alcohol having a predetermined water content produced in a distillation column. Preferred Components: The alcohol comprises methanol. The alcohol comprises alcohol that does not form an azeotrope or constant boiling mixture with water. The feed stream or first mixed stream comprises less than or equal to 5 wt.% water based upon the composition of the stream. EXAMPLE - No suitable example given.