摘要:
Soak vessels for impregnating biomass with a liquid such as a dilute acid and methods for impregnating biomass are disclosed. In some embodiments, the soak vessel includes an impeller assembly with impellers that create a vortex to submerge the biomass, that agitate and separate contaminants from the biomass and that direct biomass and contaminants to separate vessel outlets.
摘要:
Methods for producing ethanol from cellulosic biomass and, in particular, methods for controlling steam explosion pretreatment operations are disclosed. Biomass is discharged from a plug screw feeder into a pretreatment digester. The total solids content of biomass entering the pretreatment digester is calculated to provide operational data and feedback control to adjust some parameters (open drain openings, force exerted by the damper, rotational speed of the plug screw feeder; total solids content of the biomass introduced into the feeder) of the plug screw feeder
摘要:
Methods for producing ethanol from cellulosic biomass and, in particular, methods for conditioning pretreated biomass are disclosed. In some embodiments, pretreated biomass is contacted with a cooling fluid in a flash vessel to cool the biomass. The amount of alkaline solution contacted with the biomass may be based on the pH of partially hydrolyzed pretreated biomass in a liquefaction bioreactor.