| 摘要 |
This invention relates to a process of treating a lignocellulosic material t o produce bio-ethanol. The process includes the steps of: (a) exposing the lig no- cellulosic material to conditions including a pH not less than about 8, and steam at a 5 first pressure, to produce a step (a) product; (b) explosively discharging the step ( a) product to a second pressure less than the first pressure to produce a step (b) product; and ( c) further processing the step (b) product to produce bio-ethanol and other co- products. In another embodiment, the invention relates to a conical auger fractionation column. T he fractionation column includes a column body having an input and an output. A conical filter is positioned inside the column body, the filter having a larger diameter end directed toward the input and a smaller diameter end directed toward the output. A conical auger is positioned inside the conical filter, the conical auger having an outer diameter which is approximately th e same as an inner diameter of the conical filter. The auger and filter are adapted to cooperate to separate cellulosic solids from a liquid stream in a process of producing bio-ethanol from a lignocellulosic material.
|
