The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2013
Filed:
Dec. 14, 2011
James L. Gaddy, Fayetteville, AR (US);
Dinesh K. Arora, Fayetteville, AR (US);
Ching-whan Ko, Fayetteville, AR (US);
John Randall Phillips, Fayetteville, AR (US);
Rahul Basu, Bethlehem, PA (US);
Carl V. Wilkstrom, Benton, AR (US);
Edgar C. Clausen, Fayetteville, AR (US);
James L. Gaddy, Fayetteville, AR (US);
Dinesh K. Arora, Fayetteville, AR (US);
Ching-Whan Ko, Fayetteville, AR (US);
John Randall Phillips, Fayetteville, AR (US);
Rahul Basu, Bethlehem, PA (US);
Carl V. Wilkstrom, Benton, AR (US);
Edgar C. Clausen, Fayetteville, AR (US);
Ineos Bio Limited, Lisle, IL (US);
Abstract
A stable continuous method for producing ethanol from the anaerobic bacterial fermentation of a gaseous substrate containing at least one reducing gas involves culturing in a fermentation bioreactor anaerobic, acetogenic bacteria in a liquid nutrient medium; supplying the gaseous substrate to the bioreactor; and manipulating the bacteria in the bioreactor by reducing the redox potential, or increasing the NAD(P)H TO NAD(P) ratio, in the fermentation broth after the bacteria achieves a steady state and stable cell concentration in the bioreactor. The free acetic acid concentration in the bioreactor is maintained at less than 5 g/L free acid. This method allows ethanol to be produced in the fermentation broth in the bioreactor at a productivity of greater than 10 g/L per day. Both ethanol and acetate are produced in a ratio of ethanol to acetate ranging from 1:1 to 20:1.