Corn gluten meal is a high-protein byproduct (65% crude protein) obtained from the wet milling of corn for starch extraction, and is used as a protein and energy source for livestock. The document discusses the wet and dry milling processes for corn to produce ethanol, distillers grains, gluten meal, and other byproducts, and the use of distillers grains as a protein and energy supplement in cattle rations.

1. Maize gluten meal

2. Corn gluten
• Corn gluten meal is obtained whenever
maize is used for starch extraction
• Obtained as by product during wet milling
process
• Corn gluten meal is protein rich containing
about 65% crude protein
• Also used as energy and pigment for
livestock species including fishes

3. Corn gluten
• Corn gluten should not be mistaken with
corn gluten feed which contain 22% protein
rather than 65%
• In USA and corn gluten meal is used as
fertilizer and weed killer

5. 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

6. 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 1.6
Gluten feed Gluten meal Germ meal
Protein 21 60 20
Fat 2.5 2.5 2
Fiber 8 1 9.5

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

8. 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
CO2 18 lbs
Dist grains with sol Dist Sol
Protein 27 29
Fat 11 9
Fiber 9 4

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Iowa Ethanol Production
(millions of gallons)
U.S. Ethanol Production
(millions of gallons)

12. ● 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
fed @ > 30% of ration DM
Probably feeding excess protein
Feeding excess P
P does not have value for finishing cattle fed corn
Corn Distillers Grains for Finishing Cattle

13. 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