1. Wet Milling Corn Corn Cleaned Steeping Steep water Wet corn Germ
Grind Degerm
Condensed Wash Oil
Germ
Corn bran Starch & Protein meal
Ethanol Corn Corn gluten
sweeteners meal
Corn gluten feed

2. Components of corn
Starch 61.0%
Corn oil 3.8%
Protein 8.0%
Fiber 11.2%
Moisture 16.0%
Wet mill, lbs/bu
Starch 31.5
Gluten feed 12.5
Gluten meal 2.5
Oil
Gluten feed Gluten meal Germ meal
Protein
Fat
Fiber

3. Dry Milling Corn Corn Ground Heated + Water Enzyme (Starch Dextrins
Glucose)
Fermentation
Yeast enzyme
(Sugar Ethanol)
Stillage
Ethanol
Wet grains Centrifuge Distillation
WDGS Solubles

4. Components of corn
Starch 61.0%
Corn oil 3.8%
Protein 8.0%
Fiber 11.2%
Moisture 16.0%
Dry mill
Ethanol 2.7 gal
Dry distill grains 18 lbs
CO lbs
Dist grains with sol Dist Sol
Protein
Fat
Fiber

5. Iowa Ethanol Production (millions of gallons)
U.S. Ethanol Production (millions of gallons)
                                                                                                                                                                                                                                                                                                                                    
                      
                                           
                                                                 
                            
                                                   
                                                                                                                     
   
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Ethanol Production Information
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Iowa Ethanol Production (millions of gallons)
                                                                                                                                                                                                                                                                                                                                       
Source: Iowa Corn Promotion Board TOP
U.S. Ethanol Production (millions of gallons)
Iowa Corn Used for Ethanol (millions of bushels)
U.S. Corn Used for Ethanol (millions of bushels)

6. David J. Schingoethe
Dairy Science Department
South Dakota State University

8. Corn Distillers Grains for Finishing Cattle
As protein source, 8 to 15% of ration DM
As an energy source, > 15% of ration DM
May reduce acidosis because highly digestible fiber in place of starch
Wt gains & feed efficiency of cattle fed wet distillers grains usually better than with corn
Wt gains and feed efficiency of cattle fed dry distillers grains usually similar to corn
At 15 to 25% of ration DM, wet distillers grains has it greatest value
Protein and energy in distillers grains have value
DM intake may be reduces when wet distillers grains > 30% of ration DM
Probably feeding excess protein
Feeding excess P
P does not have value for finishing cattle fed corn

9. Corn Distillers Grains for Cattle Fed Roughages
Growing cattle – Cows – Calves
Energy, protein and P have value
Complements roughages
Less starch – No negative associative effects
Energy should be greater than corn
Feed to supply supplemental needs for protein and energy