Cereal Chem 68:559-562   |  VIEW ARTICLE

Yield and Composition of Soluble and Insoluble Fractions from Corn and Wheat Stillages.

W. J. Lee, F. W. Sosulski, and S. Sokhansanj. Copyright 1991 by the American Association of Cereal Chemists, Inc. 

To assess their potential as sources of dietary fiber and protein ingredients, stillages were sampled from the beer stills of three commercial ethanol distilleries that were processing corn, wheat, or corn-wheat mashes. The distillers' grains with solubles (DGS) from wheat-based mashes contained more dietary fiber and protein and less lipids than did corn-based DGS. Fractionation of the DGS into distillers' grains (DG), centrifuged solids (CS), and stillage solubles (SS) gave a partial separation of fiber into DG and protein into CS, but the yield of CS was too low for consideration as a commercial process. The weight distributions of DG, CS, and SS were approximately 42:2:56 wb and 75:5:20 db; further studies are required to effect a greater recovery of the CS fraction at a high protein level.