METHODS FOR INCREASING THE PRODUCTION OF ETHANOL FROM MICROBIAL FERMANTATION
摘要
A stable continuous method for producing ethanol from the anaerobic bacterial fermentation of a gaseous substrate containing at least one reducing gas involves culturing 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 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.
申请公布号
HU226975(B1)
申请公布日期
2010.03.29
申请号
HU20030001388
申请日期
2001.07.23
申请人
EMMAUS FOUNDATION INC., FAYETTEVILLE
发明人
GADDY, JAMES L.;ARORA, DINESH K.;KO, CHING-WHAN;PHILLIPS, JOHN RANDALL;BASU, RAHUL;WIKSTROM, CARL V.;CLAUSEN, EDGAR C.