TECHNOLOGY FOCUS - AGRICULTURE - Preferred Component: The grain source comprises corn.    TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Process: Biofuel production is a Dry Mill Ethanol process and includes, before extracting with solvent, drying distillers grains with the solvent. Reacting the oil involves subjecting the oil to transesterification. Drying distillers grains with solvent reduces air pollutants associated with the drying of distillers grains. Drying wet distillers grains includes evaporating the extract to provide a concentrate and ethanol, and processing the concentrate, sufficient to provide biodiesel.    TECHNOLOGY FOCUS - INDUSTRIAL STANDARDS - The biodiesel meets ASTM D6751-02 standards.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: The distillers grains comprise wet distillers grains or dried distillers grains and solubles (DDGS), which are the by-product of a biofuel production process. The extract comprises solubles and solvent derived from the solvent washing of distillers grains. The enriched food product comprises distillers grains without oil or fat. The biofuel comprises ethanol. The solvent comprises ethanol or methanol. EXAMPLE - Dried distillers grains (10 kg) and dried distillers grains and solubles (DDGS) or wet distillers grains (22 kg) were extracted with ethanol in a stainless steel flanged column at 80degreesC and a flow rate of 10 L/hour. After 6 hours extraction, the liquor (concentrate) was collected and evaporated to 6 L and was then left to settle at ambient temperature in a separator. The top layer (2000 ml) was separated and mixed with the ethanol (2000 ml) and sulfuric acid (10 ml). The mixture was then stirred and refluxed for over 8 hours. After settling at ambient temperature in a separator, the bottom layer was separated. The top layer was evaporated on a rotary, giving ethanol (1800 ml) recovery and then distilled in vacuum, giving ethyl esters fraction (1400 g). The product conforms to D6751-02 Standard Specification for Biodiesel Fuel (B100) Blend Stock for Distillate Fuels.