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To: not_prudent who wrote (148448)	3/29/2011 11:31:17 AM
From: elmatador	Read Replies (1) of 206223

One tonne of corn produces 378 L of ethanol and 479 kg WDG (70% moisture content), or 309 kg of DDGS (10% moisture content). Wet and Dry Distillers Grains There are two common types of distillers grains. Wet Distillers Grains (WDG) contains primarily unfermented grain residues (protein, fibre, fat and up to 70 per cent moisture. WDG has a shelf life of four to five days and involves the transport of 70 per cent water by weight of total product. WDG supply transport is economically viable usually within a 200 km radius from the ethanol production facility. These facts are important as they affect both profitability and logistic issues. Dried Distillers Grains with Solubles (DDGS) is WDG that has been dried with the concentrated thin stillage to 10-12 per cent moisture (Figure 1). DDGS have an almost indefinite shelf life and may be sold and shipped to any market regardless of its vicinity to an ethanol plant. Drying is costly, as it requires the input of further energy. In the US, it is packaged and traded as a commodity product The nutrient composition of distillers grains, depends on the type, variety and quality of Dry mill ethanol processing creates wet and dry forms of distillers grains.

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