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  • Does corn ethanol produce DDGs?
  • The increasing trend of biofuel production from corn ethanol leads to increased quantities of coproducts from corn. The DDGS is the main coproduct produced in bioethanol plants, mainly by the dry-grind process, which has been used as a low-value animal feed.
  • How to recover germ and pericarp from corn?
  • After soaking (6¨C12 hr) and grinding of corn kernels, the mixture is incubated with protease (increases the rate of fermentation by hydrolyzing protein into free amino nitrogen) and starch degrading enzyme (amylase) for 2¨C4 hr; this helps to recover germ and pericarp in the following steps (Singh et al., 2005).
  • What are non-fermentable residues from corn bioethanol production plants?
  • Non-fermentable residues from the corn bioethanol production plants are divided into two typical types, condensed distillers solubles (CDS) and wet distillers grains (WDG). CDS is the concentrated form (35%¨C40% solids) of thin stillage (5%¨C10% solids).
  • What process converts corn into fuel ethanol?
  • Two primary commercial processes that convert corn into fuel ethanol are wet milling (corn fractionation into germ, fiber, and starch) and dry-grinding (without corn fractionation). Dry milling is sometimes incorrectly used as a dry-grind process.