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United States Department of Agriculture

Agricultural Research Service

Title: Reducing Phosphosrus Concentration of Ethanol Distiller Byproducts by Using Low Grain Phosphorus Corn.

Author
item Eghball, Bahman

Submitted to: Extension Publications
Publication Type: Experiment Station
Publication Acceptance Date: August 1, 2004
Publication Date: November 1, 2004
Citation: Eghball, B. 2004. Reducing phosphosrus concentration of ethanol distiller byproducts by using low grain phosphorus corn. University of Nebraska xtension Publications Volume 10, Number 7. Online: http://manure.unl.edu/adobe/v9n5_03.pdf

Interpretive Summary: Ethanol distillers byproduct contains protein, energy, P, and other nutrients and is usually fed to cattle or other livestock. The P concentration of the byproduct is high and that results in excess P in manure. High P manure can build up P in the soil and cause greater P loss in runoff. Corn hybrids can have different P concentrations in the grain. Low grain P corn can be used to produce ethanol while reducing the byproduct P concentration. Analysis of commercial corn hybrids indicated grain P concentrations range of 0.19% to 0.39%. This range of P concentration provides an opportunity to reduce P in the distillers byproducts. Based on 90% starch conversion efficiency, the estimated P concentrations of ethanol byproduct were 0.52% and 1.04% when using grain with P concentrations of 0.19% and 0.39%, respectively. This is a reduction of 50% when using low P instead of high P corn hybrids.

Technical Abstract: Corn hybrids can have different P concentrations in the grain. Low grain P corn can be used to produce ethanol while reducing P concentration in the byproduct that is usually fed to cattle or other livestock. Analysis of commercial corn hybrids indicated grain P concentrations range of 0.19% to 0.39%. This range of P concentration provides an opportunity to reduce P in the distillers byproducts. Based on 90% starch conversion efficiency, the estimated P concentrations of ethanol byproduct were 0.52% and 1.04% when using grain with P concentrations of 0.19% and 0.39%, respectively. This is a reduction of 50% when using low P instead of high P corn hybrids.

Last Modified: 4/20/2014
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