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ARS Home » Plains Area » Brookings, South Dakota » Integrated Cropping Systems Research » Research » Publications at this Location » Publication #245653
Title: Effects of CDS and Drying Temperature Levels on the Flowability Behavior of DDGS

Author
item BHADRA, RUMELA - South Dakota State University
item Rosentrater, Kurt
item MUTHUKUMARAPPAN, M - South Dakota State University

Submitted to: Meeting Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 9/17/2009
Publication Date: 9/17/2009
Citation: Bhadra, R., Rosentrater, K.A., Muthukumarappan, M. 2009. Effects of CDS and Drying Temperature Levels on the Flowability Behavior of DDGS. 2009 ASABE Annual International Meeting, Reno NV, June 21-24, 2009.

Interpretive Summary: The fuel ethanol industry has been one of the fastest growing industries, with a growth rate of more than 300% since 2000. Due to demand for alternative fuels and the need to reduce dependence on fossil fuels, the growth of ethanol production is expected to rise in future years. One of the problems facing this industry is transportation of the coproduct dried distillers grains with solubles (DDGS) over long distances, since caking between the particles can lead to flow problems. In this study we have prepared DDGS by combining condensed distillers solubles (CDS) and distillers wet grains (DWG), drying to investigate the effects of drying temperature (100, 200, and 300ºC) and CDS (10, 15, and 20% wb) level on the resulting flowability behavior of the DDGS. Statistical analyses found significant differences, and showed interaction effects between CDS level and drying temperature for many of the flow parameters. Regression analysis for the ratio of Total Flow Index/Jenike Flow Function as the function of CDS and drying temperature levels resulted in a R2 value of 0.943. Partials Least Squares (PLS) regression yielded an R2 of 0.90 for the Jenike Flow Function Index as a function of all flow and physical properties, using only two components. Understanding the effects of varying drying temperature and CDS levels can help to overcome flowability problems in DDGS.

Technical Abstract: The fuel ethanol industry has been one of the fastest growing industries, with a growth rate of more than 300% since 2000. Due to demand for alternative fuels and the need to reduce dependence on fossil fuels, the growth of ethanol production is expected to rise in future years. One of the problems facing this industry is transportation of the coproduct dried distillers grains with solubles (DDGS) over long distances, since caking between the particles can lead to flow problems. In this study we have prepared DDGS by combining condensed distillers solubles (CDS) and distillers wet grains (DWG), drying to investigate the effects of drying temperature (100, 200, and 300ºC) and CDS (10, 15, and 20% wb) level on the resulting flowability behavior of the DDGS. Statistical analyses found significant differences, and showed interaction effects between CDS level and drying temperature for many of the flow parameters. Regression analysis for the ratio of Total Flow Index/Jenike Flow Function as the function of CDS and drying temperature levels resulted in a R2 value of 0.943. Partials Least Squares (PLS) regression yielded an R2 of 0.90 for the Jenike Flow Function Index as a function of all flow and physical properties, using only two components. Understanding the effects of varying drying temperature and CDS levels can help to overcome flowability problems in DDGS.