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Description: Distillers dried grains withsolubles (DDGS), a coproduct of ethanol fuel production, isused as an animal feed and often must be transported long distances. DDGS flowability problems often create nuisance in storage and transportation. Materials above the glass transition temperature (Tg) can exist in a €˜€˜rubbery state,'' which is often responsible for particle agglomeration and caking. This study investigated the effects of varying condensed distillers solubles (CDS) (10, 15, and 20%, wb), drying (100, 200, and 3008C), and cooling temperature (12 and 358C) levels on the Tg of DDGS. Tg ranged from 34 to 588C and 41 to 598C for cooling temperatures of 128C and 358C, respectively. Tg data were used to develop an overall regression model, which yielded a predictive model with R2 of 0.74 and SEM of 3.16. Using. this model, optimum drying and cooling temperatures were determined. These conditions may be used to reduce flow problems.

Keywords: caking, distillers dried grains with solubles (ddgs), drying, flowability.
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Citation: Bhadra, R., K.A. Rosentrater and K. Muthukumarappan. 2011. Effects of varying condensed distillers solubles, drying and cooling Temperatures on glass transition temperature of distillers dried grains. Canadian Biosystems Engineering. 53: 3.9-3.18.
Volume: 53
Issue: 3
Pages 3.9 - 3.18
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Date: 2012-07-31
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Coverage: Canada
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