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US 2022/0177931 A1Published application
Process and composition for controlling ethanol production
OwnerRyan H. Senaratne, Abel Price +1inventors
InventorsRyan H. Senaratne, Abel Price, Michael Neubeck
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Abstract
The present invention provides a process for controlling the production of ethanol by microbial fermentation of gaseous substrates. More specifically, a process is provided for controlling ethanol productivity through addition of vitamins and a low cell retention time. In accordance with the process, vitamins B1, B5 and B7 are added in amounts that increase specific ethanol productivity. Cell retention times are maintained at low levels.
Claims12
A fermentation process, comprising:
- providing a CO-containing gaseous substrate to a fermentor that includes a fermentation broth;
- providing vitamin B1, B5, and B7 to the fermentation broth, wherein a feed rate of vitamin B5 is about 25 to about 150 ug/g cells produced or less;
- and
- fermenting the CO-containing gaseous substrate with one or more acetogenic bacteria with a cell retention time of about 15 hours or less,
- wherein the process provides a specific ethanol productivity rate of about 10 g/day/gram cells or more.
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Dependencies are inferred from the claim text.