Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Patent
1987-05-04
1989-06-20
Warren, Charles F.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
435244, 4352521, 435813, C12P 706, C12N 138, C12N 100
Patent
active
048409022
ABSTRACT:
A continuous process for the production of ethanol by fermentation of an organism of the genus Zymomonas is provided. The method is carried out by cultivating the organism under substantially steady state, anaerobic conditions and under conditions in which ethanol production is substantially uncoupled from cell growth. By controlling pH in the fermentation medium between a pH of about 3.8 and a pH less than 4.5, it is possible to optimize kinetic parameters, such as q.sub.s (g substrate/g biomass-hr.sup.-1) and q.sub.p (g ethanol/g biomass-hr.sup.-1) without adversely affecting ethanol concentration in the fermentation medium.
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George Weston Limited
Marx Irene
Warren Charles F.
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