Method of conversion of syngas using microorganism on...

Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound

Reexamination Certificate

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C435S041000, C435S136000, C435S157000, C435S297100, C435S297200, C435S297300, C435S297400

Reexamination Certificate

active

07923227

ABSTRACT:
A stable system for producing liquid products such as ethanol, butanol and other chemicals from syngas components contacts CO or a mixture of CO2and H2with a hydrophilic membrane under anaerobic conditions and transfers these components into contact with microorganisms contained as a biofilm on the membrane. Maintaining the microorganisms as a biolayer on the surface of the membrane facilitates cleaning of the membrane surface that retains the biofilm. In addition the shell gas space that surrounds the membranes may be flooded to reduce or remove the biofilm. Agitation of the liquid, by for example the bubbling of gas in the surrounding shell space, can fully or partially remove the biofilm from the membrane.

REFERENCES:
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patent: 6844187 (2005-01-01), Wechsler et al.
patent: 2003/0211585 (2003-11-01), Gaddy et al.
patent: 2005/0260739 (2005-11-01), Rosen et al.
patent: 2006/0096912 (2006-05-01), Nussbaumer et al.
patent: 2006/0163157 (2006-07-01), Cote et al.
Inloes et al. Ethanol production bySaccharomyces cerevisiaeimmobilized in hollow-fiber membrane bioreactors. Applied and Environmental Microbiology. p. 267-278. Jul. 1983.

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