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Corn Processing Co-products Manual
A REVIEW OF CURRENT RESEARCH ON DISTILLERS GRAINS AND CORN GLUTEN
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| A joint project of the Nebraska Corn Board and the University of Nebraska Lincoln Institute of Agriculture and Natural Resources Agricultural Research Division Cooperative Extension Division |
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| Brought to you by Nebraska corn producers through their corn checkoff dollars expanding demand for Nebraska corn and value-added corn products. |
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DEFINITIONS
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Dry-milled: the process by which the entire corn kernel is ground into a meal and then fermented into alcohol.
Wet-milled: steeped in water with or without sulfur dioxide to soften the kernel in order to facilitate the separation of the various component parts.
Corn Distillers Dried Solubles: obtained after the removal of ethyl alcohol by distillation from the yeast fermentation of a grain mixture by condensing the thin stillage fraction and drying it by methods employed in the grain distilling industry.
Corn Distillers Dried Grains: obtained after the removal of ethyl alcohol by distillation from the yeast fermentation of a grain or grain mixture by separating the resultant coarse grain faction of the whole stillage and drying it by methods employed in the grain distilling industry.
Corn Distillers Dried Grains with Solubles (DDGS): product obtained after the removal of ethyl alcohol by distillation from the yeast fermentation of a grain or a grain mixture by condensing and drying at _ of the solids of the resultant whole stillage by methods employed in the grain distilling industry.
Distillers Wet Grains (WDG): product obtained after the removal of ethyl alcohol by distillation from the yeast fermentation of a grain mixture.The guaranteed analysis shall include the maximum moisture.
Corn Gluten Feed (DCGF = dried;WCGF = wet): part of the commercial shelled corn that remains after the extraction of the larger portion of the starch, gluten, and germ by the processes employed in the wet milling manufacture of corn starch or syrup. It may or may not contain one or more of the following: fermented corn extractives, corn germ meal.
Corn Gluten Meal: dried residue from corn after the removal of the larger part of the starch and germ, and the separation of the bran by the process employed in the wet milling manufacture of corn starch or syrup, or by enzymatic treatment of the endosperm. It may contain fermented corn extractives and/or corn germ meal.
Steep-extracting: soaked in water or other liquid (as in the wet milling of corn) to remove soluble materials.
Steepwater: water containing soluble materials extracted by steep-extraction
Germ: the embryo found in seeds and frequently separated from the bran and starch endosperm during milling.
Stillage: the mash from fermentation of grains after removal of alcohol by distillation.
Distillation Solubles: stillage filtrate
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Thanks to the Association of American Feed Control Officials (AAFCO) for permission to reprint definitions. For a copy of the 2005 AAFCO Official Publication, please reference the order form on the following page or visit their website at www.aafco.org.
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Date published: January, 2005
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