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ARS Home » Plains Area » Brookings, South Dakota » Integrated Cropping Systems Research » Research » Publications at this Location » Publication #199475
Title: EFFECTS OF FLOW AGENT AND SOLUBLE CONTENT ON THE PHYSICAL PROPERTIES OF DDGS

Author
item GANESAN, VYKU - SOUTH DAKOTA STATE UNIV
item MUTHUKUMARAPPAN, K - SOUTH DAKOTA STATE UNIV
item Rosentrater, Kurt

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/18/2006
Publication Date: 6/5/2006
Citation: Ganesan, V., Muthukumarappan, K., Rosentrater, K.A. 2006. Effects of flow agent and soluble content on the physical properties of ddgs. Meeting Abstract for Corn Utilization and Technology Conference, Dallas TX, June 5-7, 2006.

Interpretive Summary:

Technical Abstract: Distillers’ dried grain with solubles (DDGS) is a valuable source of energy, protein, water soluble vitamins and minerals for animal feeds, especially beef, dairy, swine, and poultry diets. DDGS generally contains 88 to 90% (d.b.) dry matter, 25 to 32% (d.b.) crude protein and 8 to 10% (d.b.) fat. With the exponential growth of the fuel ethanol industry in the past several years, significant quantities of DDGS are now being produced. To effectively utilize these feeds in the domestic market, however, these coproduct streams are increasingly being transported greater distances, and must be stored in various structures until final use. DDGS flow is often problematic, as it frequently becomes restricted by caking and bridging during storage and transport. This issue may arise from a number of factors, including storage moisture, temperature, relative humidity, particle size, time, temperature, or composition variations. Flow conditioners are commonly used as additives to assist a powder or granular material in maintaining a steady flow and/or increase its flowability. Previous work, has found that increased addition of solubles to DDGS affects some of the resulting physical and chemical properties. The objective of this study is to examine the effect of various temperature and moisture content levels on the resulting physical properties of DDGS with varying soluble percentages, and to determine the effect of addition of flow conditioning agent. Carr Indices have been used to quantify the flowability of DDGS with varying soluble (15%), moisture content (10, 15, 20, 25 and 30% d.b.) and flow agent (CaCO3 - 0, 1 and 2% w.b.) levels. Results include angle of repose (43.50 - 47.30o), aerated bulk density (0.563 - 0.612 g/cc), packed bulk density (0.584 - 0.621 g/cc), compressibility (1.4 - 5.43%), angle of spatula (57.47 - 62.57o), uniformity (2 - 2.8), angle of fall (34.87 - 40.2o), angle of difference (4.3 - 12.43o), dispersibility (5.87 - 10.6%), flow index (71.5 - 79.67) and flood index (52 - 59.5). Results indicate that there are flow issues in DDGS with increased soluble and moisture content levels. Flow agent addition did not have a significant effect in improving the flow properties of DDGS with various soluble and moisture content levels.