Hi-Pro(40) is a concentrated form of dried distillers grains (DDG) with higher protein and lower fiber content. During ethanol production, corn grain is ground and added to hot water to form a mash. Fiber Separation Technology™ washes and separates fiber from the mash stream, and enzymes convert the starch to sugar. After the starch is removed, the whole stillage is separated into thin stillage and grains. The grains are then dried without the solubles and fiber fractions.