Agricultural and Biosystems Engineering Publications

Document Type

Article

Publication Date

9-2011

Journal or Book Title

Ceral Chemistry

Volume

88

Issue

5

First Page

480

Last Page

489

Research Focus Area(s)

Biological and Process Engineering and Technology

DOI

10.1094/CCHEM-12-10-0179

Abstract

Neural network (NN) modeling techniques were used to predict flowability behavior of distillers dried grains with solubles (DDGS) prepared with varying levels of condensed distillers solubles (10, 15, and 20%, wb), drying temperatures (100, 200, and 300°C), cooling temperatures (–12, 25, and 35°C), and storage times (0 and 1 month). Response variables were selected based on our previous research results and included aerated bulk density, Hausner ratio, angle of repose, total flowability index, and Jenike flow index. Various NN models were developed using multiple input variables in order to predict single-response and multiple-response variables simultaneously. The NN models were compared based on R2, mean square error, and coefficient of variation obtained. In order to achieve results with higher R2 and lower error, the number of neurons in each hidden layer, the step size, the momentum learning rate, and the number of hidden layers were varied. Results indicate that for all the response variables, R2 > 0.83 was obtained from NN modeling. Compared with our previous studies, NN modeling provided better results than either partial least squares modeling or regression modeling, indicating greater robustness in the NN models. Surface plots based on the predicted values from the NN models yielded process and storage conditions for favorable versus cohesive flow behavior for DDGS. Modeling of DDGS flowability using NN has not been done before, so this work will be a step toward the application of intelligent modeling procedures to this industrial challenge.

Comments

This article is from Cereal Chemistry 88, no. 5 (September/October 2011): 480–489, doi:10.1094/CCHEM-12-10-0179.

Copyright Owner

AACC International, Inc.

Language

en

Date Available

January 28, 2013

File Format

application/pdf

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