发明名称 |
Methods for increasing the production of ethanol from microbial fermentation |
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.
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申请公布号 |
US2003211585(A1) |
申请公布日期 |
2003.11.13 |
申请号 |
US20030311655 |
申请日期 |
2003.03.11 |
申请人 |
GADDY JAMES L.;ARORA DINESH K.;KO CHING-WHAN;PHILLIPS JOHN RANDALL;BASU RAHUL;WIKSTROM CARL V.;CLAUSEN EDGAR C. |
发明人 |
GADDY JAMES L.;ARORA DINESH K.;KO CHING-WHAN;PHILLIPS JOHN RANDALL;BASU RAHUL;WIKSTROM CARL V.;CLAUSEN EDGAR C. |
分类号 |
C12P7/06;C12P;C12R;C12R1/02;C12R1/145;(IPC1-7):C12P7/06 |
主分类号 |
C12P7/06 |
代理机构 |
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代理人 |
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地址 |
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