Processes and systems for the production of fermentation products

摘要

The present invention relates to the production of fermentation products such as alcohols including ethanol and butanol, and processes employing in situ product removal methods.

主权项

1. A method for producing and recovering a product alcohol from a fermentation broth comprising:
(a) providing a feedstock slurry comprising fermentable carbon source, undissolved solids, oil, and water; (b) separating the feedstock slurry by three-phase centrifugation to generate (i) an aqueous solution comprising fermentable carbon source, (ii) a wet cake comprising solids, and (iii) an oil stream; (c) adding the aqueous solution to a fermentation broth in a fermentor; wherein the fermentation broth comprises a microorganism that produces a product alcohol and whereby a product alcohol is produced; (d) conducting the fermentation broth of (c) to one or more external extractors, wherein the fermentation broth is mixed with an extractant forming an aqueous phase and an extractant phase and wherein the extractant phase is maintained as a continuous phase; and (e) recovering the product alcohol.