Department of Agricultural and Biological Engineering, Purdue University, 225 S University Street, West Lafayette, IN 47907, USA.
Bioresour Technol. 2012 Mar;107:213-21. doi: 10.1016/j.biortech.2011.11.067. Epub 2011 Dec 8.
In this study the physical, morphological and chemical characteristics of distillers dried grains with solubles (DDGS) produced by mixing three levels of condensed distillers soluble (CDS) (0%, 3.69% and 7.39% volumetric basis, v.b.) with wet distillers grains and drying were characterized. Decreasing the CDS level from 7.39% to 0% v.b. resulted in a reduction of 13.9% in geometric mean particle size and 8.8% in bulk density while the compressibility of the material increased by 3%. As the CDS level increased, pore volume, particle porosity and effective bulk porosity decreased. Crude fat, crude protein, crude fiber and ash content showed distinct patterns for all three samples studied and suggest that US sieve no. 16 (1190 μm) may be an inflection point for the chemical characteristics of DDGS granules within a bulk. The observed heterogeneity could cause sampling errors and particle segregation, and as a consequence nutrient and bulk density variability.
本研究通过混合三种不同浓度的冷凝酒糟可溶物（CDS）（体积基础 0%、3.69%和 7.39%）与湿酒糟并干燥，对生产的酒糟干燥颗粒（DDGS）的物理、形态和化学特性进行了研究。将 CDS 水平从 7.39%降至 0%时，几何平均粒径减小 13.9%，堆密度降低 8.8%，而物料可压缩性增加 3%。随着 CDS 水平的增加，孔隙体积、颗粒孔隙率和有效堆密度均减小。粗脂肪、粗蛋白、粗灰分和粗纤维含量在所有三种研究样品中均呈现出明显的模式，表明美国 16 号筛（1190 μm）可能是 DDGS 颗粒在堆中的化学特性的转折点。所观察到的异质性可能导致采样误差和颗粒分离，从而导致养分和堆密度的变化。
