Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Corn Milling, Processing and Generation of Co-Products
Kelly Davis Quality Manager
Chippewa Valley Ethanol Company
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Components of Yellow Dent CornStarch 61.0 %Corn Oil 3.8 %Protein 8.0 %Fiber 11.2 %Moisture 16.0 %
The Kernel
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Industrial Usage of Corn Produced (MM bushel)
0100020003000400050006000700080009000
10000
1980 1990 2000
Corn ProducedIndustrial Usage
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
CornCorn Wet-Milling Process Overview
steepwater
germ
Feed Industry Co-Products
Corn Cleaning
Steep Tanks
Germ Seperation
Grinding Mills
Washing Screens
Centrifugal Separators
Starch washing
Steepwater Evaporation
Germ Extraction
Corn Oil
Starch and Nutritive
Sw eetners
Corn Gluten Meal
Corn Gluten Feed
Corn Germ Meal
Cond. FermentedExtractive
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Wet-Milling Average Yield Per Bushel
n Starch 31.5 lbs n Gluten Feed 12.5 lbs n Gluten Meal 2.5 lbs n Corn Oil 1.6 lbs
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Condensed Corn Fermented Extractives n Sometimes called “Corn Steep Liquor” n Liquid Feed Ingredient n Protein value 25% at 50% solids n Combined with corn gluten n Pellet binder n Source of B-vitamins and minerals
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Corn Germ Meal n Typically analyzes 20% protein, 2% fat,
and 9.5% fiber. n Amino acid balance valuable in poultry
and swine. n Used as a carrier of liquid feed
ingredients.
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Corn Gluten Feed
n Combined streams n Typically analyzes 21% protein, 2.5%
fat, and 8% fiber. n Dried in rotary dryer and pelletized n Often sold wet n Widely used for animal feed
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Corn Gluten Meal
n Typically analyzes 60% protein, 2.5% fat and 1% fiber
n Valuable source of methionine n Xanthophylls for “yellow” poultry n High rumen by-pass protein for beef
and dairy
CornCorn Dry-Milling Process Overview
alpha amylase enzyme
CO2
Yeast andGlucoamylaseEnzyme
whole stillage
thin stillage
coarse solids
Feed Industry Co-products
Corn Cleaning
Hammermill Mix SlurryLiquefaction
Cooker
Centrifuge Evaporator
Fermentation
Dist illat ion
Ethyl Alcohol
Cond. DistillersSolubles
Distillers Dried Grains with Solubles
Distillers Wet Grains
Rotary Dryer
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Dry-Milling Average Yield Per Bushel
n Ethanol 2.7 gallons n DDGS 18 lbs n CO2 18 lbs
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Corn Condensed Distillers Solubles n Mostly added to dried grains n Available as a liquid feed ingredient n Dry matter basis 29% protein, 9% fat and 4%
fiber. Typical DM 25 – 50% n Excellent source of vitamins and minerals,
phosphorous and potassium n Can be dried to 5% moisture n Highly palatable
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Distillers Dried Grains with Solubles n Can have other grains n Has at least three fold the nutrients of the
incoming grain n Contains recycled microbial products n Yeast provide increased vitamins, particularly
B-complex group
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Distillers Dried Grains with Solubles n Typically analyzes 27% protein, 11% fat and
9% fiber n Provide ruminants an excellent source of by-
pass protein n Sold in the wet form n Successfully used in rations for beef,
dairy,poultry, swine, aquaculture and pet food rations
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Minnesota Nutrition Conference Minnesota Corn Growers
Association Technical Symposium September 11, 2001
Acknowledgments National Corn
Growers Association
