Process for the microbial anaerobic production of acetic acid
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United States of America Patent
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Jun 19, 1990
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N/A
app pub date -
Jun 1, 1987
filing date -
Jun 2, 1986
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Expired
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Abstract
An anaerobic production of acetic acid by fermentation can employ homoacetogenic bacteria in an aqueous solution of fermentable substrates, especially sugar, with the result of increased acetic-acid concentrations (over 3%), when the substrate solution initially used in the fermentation already contains acetic acid, for example, from a previous fermentation. In a fed-batch process, acetic acid is preferably present in a concentration ranging from about 0.5% to about 2%, and especially around 1%. At least two fermenters in compound (interconnected) arrangement are used. A real continuous fermentation is realized in at least two sequentially-operated fermenters by regulating the residence time in the first at about 1 day and in the second fermenter at at least 2 days.
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