Livestock feed production at American ethanol biorefineries is broken down into a number of products depending upon the process used to produce ethanol.

The vast majority of this feed is called distillers grains. Distillers grains come in various forms, but make up more than 90 percent of the product produced. Other segments of the market include corn gluten feed and corn gluten meal.

While the more than 13 billion gallons of ethanol produced by US ethanol biorefineries each year remains the largest revenue generator for the industry, livestock feed production represented nearly $4 billion in income in 2010 and that figure is likely to nearly double in 2011.

Feeding products like distillers grains to livestock reduces feed costs for beef, poultry, swine and dairy providers alike.

The entire report, complete with detailed facts on the size and scope of the industry, is available here