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Exhibit 13-4

Producing Corn Ethanol: Wet Milling

In wet milling, corn is soaked in water and acid to separate the various grain components. Grinders then separate the corn germ from the fiber, gluten and starches. The starch and water from the mash are converted into ethanol. Other components of the corn can be used to produce corn gluten meal, corn gluten feed, cornstarch, corn syrup and corn oil.

For more information on this exhibit, please contact the Comptroller’s Data Services Division at 512-463-4900 or at P.O. Box 13528, Austin, Texas 78711-3528.

Source: Renewable Fuels Association.

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