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Ethanol Byproducts Pelletized
By Mr Ethanol | November 9, 2007
Bismarck Farm & Ranch Guide:
One hundred percent of distillers dried grains with solubles (DDGS), a byproduct of ethanol production, can be pelletized without adding a binding agent or anything else, according to Agricultural Research Service (ARS) scientists and cooperators.
ARS agricultural engineeer Kurt Rosentrater has turned DDGS from corn-based ethanol production into high-quality pellets using processing equipment at a commercial feed mill. And the heating used in pelletizing did not harm the high-protein, low-starch nutrient content. Rosentrater is at the ARS North Central Agricultural Research Labor-atory, Brookings, S.D. He does this research with colleagues at ARS and at nearby South Dakota State University.
Cattle feed is currently the primary outlet for distillers grain. But other livestock such as swine and poultry can also eat it. To date, there are no commercial DDGS pellets available for livestock, which limits the byproduct’s use in rangeland settings. DDGS is the protein, fat, fiber, unconverted starch and ash left over after ethanol production.
Fish raised for food in the growing aquaculture industry eat pelletized feed, but those pellets contain commercial fish meal as a protein source, not the less-expensive distillers grain. Rosentrater is experimenting with adding soy and corn flour to distillers grain to produce pelletized feeds, to see how far he can reduce the fish meal - or if he can eliminate it entirely.
This pelletizing work also… read on.
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