Skip to main content
ARS Home » Research » Publications at this Location » Publication #172654


item Johnston, David
item Mcaloon, Andrew
item Moreau, Robert
item Hicks, Kevin
item Singh, Vijay

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/15/2004
Publication Date: 6/28/2004
Citation: Johnston, D., Mcaloon, A.J., Moreau, R.A., Hicks, K.B., Singh, V. Composition and economic comparison of germ fractions derived from modified corn processing technologies. Meeting Abstract 2004. International Fuel Ethanol Workshop & Expo. Kansas City, MO, June 28-July 1. Track 3: Dry Mill Ethanol lPOroduction Modifications (1).

Interpretive Summary:

Technical Abstract: During the past few years a number of new processes for milling corn have been developed. Several were developed specifically to isolate germ as a value added coproduct to improve the profitability of dry grind ethanol production. The successful implementation of these new processes is dependent upon having an adequate market for the germ produced. The acceptance and purchase price of germ (determined by owners of extraction facilities) from newly developed processes will be subject to the quality and composition of germ. The economic benefits from the new germ recovery processes will be determined by the composition, quality and yields of germ and any other benefits derived from the specific process. The work presented in this study was aimed at determining the quality, composition and yield differences among corn germ produced using the modified processes and comparing these data to the conventional wet and dry milled germ to develop an economic value for comparison. A method for calculating the estimated market value for germ produced using alternative processing methods will be presented. We found differences in germ composition, as well as the estimated market values, produced by the alternative milling processes. Different germ fractions were found to contain 18 to 41% oil, 13 to 21% protein and 6 to 21% starch, depending on the milling process used. The estimated value of germ from these processes varied from $0.58 per pound to $0.114 per pound. This was indicative that the specific process will have major impact on the overall economics of the ethanol process.