Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Date

9-2011

Journal or Book Title

Ceral Chemistry

Volume

88

Issue

5

First Page

451

Last Page

458

Research Focus Area(s)

Biological and Process Engineering and Technology

DOI

10.1094/CCHEM-02-11-0018

Abstract

Distillers dried grains with solubles (DDGS) is a widely used animal feed. But transportation of DDGS is often troublesome because of its stickiness. DDGS is formed by combining condensed distillers solubles (CDS) with distillers wet grains (DWG) and then drying. As a first step toward understanding drying behavior, this study's objective was to investigate batch-drying kinetic behavior of DWG with three CDS addition levels (10, 15, and 20% wb) and three drying-temperature levels (100, 200, and 300°C). Multiple nonlinear mathematical models were used to fit experimental drying data for moisture content versus drying rate. A new comprehensive model was developed (R2 = 0.89, SEM = 18.60) from a modified Chen and Douglas model to incorporate CDS and drying-temperature terms. Drying temperature affected drying rate more significantly than did changes in CDS level; thus, drying temperature was the main effect and CDS was a subeffect. Increasing the drying temperature increased the drying rate significantly for all levels of CDS addition. This model can be used for predicting DWG drying behavior under broad operating conditions; it can be used to help the industry produce better DDGS, which may thus result in better DDGS handling and transport characteristics.

Comments

This article is from Cereal Chemistry 88, no 5 (September/October 2011): 451–458, doi:10.1094/CCHEM-02-11-0018.

Copyright Owner

AACC International, Inc.

Language

en

Date Available

January 28, 2013

File Format

application/pdf

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