Extraction of oil from corn distillers dried grains with solubles

摘要

The feasibility of extracting crude corn oil from distillers dried grains with solubles (DDGS) of corn was studied using anhydrous ethanol as a solvent. Total solids, fat, glycerol, and protein extracted from DDGS increased with increasedethanol-to -DDGS ratio at 50℃ and an extraction time of 30 min. However, ethanol-to-DDGS ratios above 6 mL ethanol per g DDGS did not significantly increase the amount of oil extracted, but did increase glycerol extraction. At the optimum ethanol-to-DDGS ratio of 6, about 50 of the crude corn oil can be extracted from DDGS in a single extraction step.