| 摘要 |
Disclosed is a method for producing ethanol with fermentation comprising: a) fermenting a fermentable mash in the presence of chloramine, and yeast in a vessel to produce ethanol and a solids content, wherein chloramine controls growth of bacteria in the mash; and b) distilling the fermented mash to separate at least a portion of the ethanol from the solids content of the fermented mash. Also disclosed is a method for producing ethanol comprising: a) fermenting a fermentable mash in the presence of yeast and recycled process water in a fermenter vessel to produce fermented mash comprising ethanol and a solids content; b) optionally scrubbing gaseous emissions from the fermenter vessel with an aqueous solution and recycling at least a portion of the scrubber effluent solution into the fermenter vessel; c) optionally storing at least a portion of the fermented mash in at least one beer well; d) feeding fermented mash to a distillation unit; e) distilling the fermented mash in the distillation unit to separate at least a portion of the ethanol from stillage; f) separating the stillage into a liquids-containing fraction and a solids-containing fraction; g) optionally recycling at least portion of the liquids-containing fraction of f) into the fermenter vessel; h) recovering the solids-containing fraction of f) as at least in part as wet distillers grains product and/or drying at least a portion of the solids-containing fraction to produce distillers dried grains product and evaporated vapours; i) optionally condensing the evaporated vapours of h) and recycling at least a portion of the condensed vapours into the fermenter vessel, and wherein stabilized oxidizer in the form of stabilized chloramine is added to or is present in at least one source of recycled water of the scrubber effluent solution of b), the liquids-containing fraction from stillage separation of f), and condensed vapours from distillers grains drying of i), or any combinations thereof, before the water source is recycled into the fermenter vessel. |
