| 摘要 |
<p>An improved process for converting lignocellulosic biomass-to-ethanol comprising: providing a biomass material selected from the group consisting of unmodified carbohydrate material, chemically modified carbohydrate material, derivatized carbohydrate material and mixtures thereof; treating said material enzymatically, chemically, physically or mechanically to produce a glucose containing fluid; treating the glucose containing fluid in a fermenter with a fermentative microorganism at temperatures between about 20 °C to about 50 °C and at pH ranges from about 3.0 to about 7.0; separating cell mass from said material and solutions surrounding said cell mass from said materials and recycling the cell mass and solutions surrounding the cell mass back to the fermenter to provide a source of nutrients for the fermentative organism; extracting ethanol from the fermentation broth with distillation or an extracting solvent or with membranes; and evaporating the ethanol from the fermentation broth.</p> |
