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Flowability of Distiller’s Spent Grains Processed with Air and Superheated Steam Drying

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  MBSK 10-503,  ASABE/CSBE North Central Intersectional Meeting. (doi: 10.13031/2013.36289) @2010
Authors:   Kelsey Kristine Hargreaves, Magdalena Zielinska, Stefan Cenkowski
Keywords:   Keywords Distillers spent grain, distillers dried grain, superheated steam, cohesion, internal angle of friction, internal friction, shear test, shear cellIntroduction

The objective of this study was to measure flowability properties of distiller’s dried grains with solubles (DDGS). A direct shear cell test using an Instron® load frame was developed to measure cohesion and internal angle of friction. The effect of drying method (air or superheated steam), drying temperature (110°C, 130°C, and 160°C), soluble content (0% and 50%), and moisture content (5% and 15% wb) on cohesion and angle of internal friction were examined. Samples were preconsolidated before testing and sheared under four normal loads. Maximum shear stress for each test was recorded. Cohesion and angle of internal friction were then determined by plotting maximum shear stress versus normal stress. For air dried samples, cohesion ranged from 0.151 to 0.268 kPa and angles of internal friction ranged from 15.1° to 26.9°. For superheated steam dried samples, cohesion ranged from 0.151 to 0.324 kPa and angles of internal friction ranged from 14.4° to 28.9°.

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