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专利提供了改进乙醇产率的系统和方法。原料碾磨到适合发酵的细度。原料可以包括玉米芯或任何其它合适的材料。在某些情况下,在碾磨前原料经过分馏。碾磨的原料可与水淤浆化,并发酵有利于原料中的淀粉转化成糖。淤浆可能约含35%的固体。淤浆化后,乙醇可能增加。此外,淤浆的pH值可以调节在4.2~5.2之间,有利于引发加入淤浆的引发剂A。引发剂可能包括任何弱酸,在某些情况下可能包括醋酸。当醋酸作为引发剂时,加入的浓度可
The patent provides systems and methods to improve ethanol yield. The raw material is milled to a fineness suitable for fermentation. The feedstock may include corn cob or any other suitable material. In some cases, the feed is fractionated before milling. The milled material can be slurried with water, and the fermentation facilitates conversion of the starch in the raw material to sugar. The slurry may contain about 35% solids. After slurring, ethanol may increase. In addition, the pH of the slurry can be adjusted between 4.2 and 5.2, which facilitates the initiation of the initiator A added to the slurry. Initiators may include any weak acid, and in some cases may include acetic acid. When acetic acid is used as an initiator, the added concentration can be