Distiller’s Dried Grains with Solubles DDGS

Knott, J., Shurson, J., and Gohil, J. (2003), Variation in Particle Size and Bulk Density of Distiller s Dried Grains with Solubles (DDGS) Produced by "New Generation" Ethanol Plants in Minnesota and South Dakota, (Website http //www.ddgs.umn.edu/ research-quality/variation.pdf). Department of Animal Science University of Minnesota. Last modified 9/11/03. 

Liquefied biomass may contain low molecular weight polymers. These low molecular weight polymers can be directly used as final products such as adhesive (glue) (Chen and Chen, 1996). They also can be copolymerized to produce other polymeric materials such as polyurethane, polyester, fibers, and so on. If they are blended with other biomass particles, such as lignocellulosic particles or distiller s dried grains with solubles (DDGS), high density panels or molded articles can be produced. 

By-Products. After the removal of alcohol, the fermentation residues are processed to produce distillers grains. These residues consist of proteins, fats, minerals, vitamins, and fiber that are concentrated threefold by removal of the starch. Distillers grains are usually divided into one of four groups including distillers dry grains (DDG), distillers dry solubles (DDS), distillers dry grains with solubles (DDG/S), and condensed distillers solubles (CDS). 

In most of today s ethanol plants for the conversion of wheat, rye and corn, the required thermal energy is provided by natural gas, heavy fuel oil or coal. The protein-rich by-products of ethanol plants are referred to as dried distillers grains with solubles , abbreviated as DDGS, and are mostly used for animal fodder. Alternatively, they can be converted to biogas for heat and electricity production. The resulting residue can then be used as fertiliser (see Table 7.16). 

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