Biological conversion and product recovery processes
AssigneeLanzaTech, Inc.
InventorsMichael James Harry Mawdsley, Michael Emerson Martin, Kathleen Frances Smart, Rachel Jane Brenc
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Abstract
The invention provides a process for reducing bio-catalytic oxidation of a product in a post-production stream. More particularly the invention provides a process for reducing bio-catalytic oxidation of an alcohol in a product stream, the product stream comprising an alcohol product, dissolved carbon dioxide, and at least one enzyme capable of oxidizing the alcohol. The invention finds applicability in fermentation processes, wherein a C1-fixing microorganism utilizes a C1-containing substrate to produce a fermentation product.
Claims19
A process for reducing bio-catalytic oxidation of alcohol, the process comprising:
- a. withdrawing a bleed stream from a bioreactor, the bleed stream comprising CO2, an alcohol, and at least one enzyme capable of oxidizing the alcohol, and
- b. treating the bleed stream to reduce oxidation of the alcohol by the enzyme, wherein treating comprises at least one of
- (i) sparging the bleed stream with a nitrogen gas;
- (ii) increasing the temperature of the bleed stream;
- and
- (iii) depressurizing the bleed stream.
A process for reducing bio-catalytic oxidation of ethanol in a product stream, wherein the product stream comprises a primary alcohol, dissolved CO2, and at least one enzyme capable of oxidizing the alcohol, the process comprising:
- a. withdrawing a product stream from a reactor;
- and
- b. treating the product stream to reduce the oxidation of the alcohol.
Dependencies are inferred from the claim text.