C - Chemistry – Metallurgy – 12 – P
Patent
C - Chemistry, Metallurgy
12
P
195/133
C12P 7/40 (2006.01) C12J 1/04 (2006.01)
Patent
CA 1063053
ABSTRACT OF THE DISCLOSURE A novel two-stage submerged fermentation process for producing vinegar with an acetic acid concentration of more than 15% is disclosed. In the first fermentation stage, the total concentration (i.e. the sum of the alcohol and acetic acid concen- trations) increases from a starting level between 12 and 15% to a level above 15%, generally between 15 and 17%, but the acetic acid concentration is not permitted to exceed 15% while the al- cohol concentration is maintained between about 1 and 5%, whereby both bacteria multiplication and acidification take place in the fermenting liquid. In the second fermentation stage, the total concentration is maintained constant but the acetic acid concen- tration is permitted to rise above 15% while the alcohol concen- tration drops almost to zero, whereby mainly acidification will occur while bacteria multiplication decreases and stops. The second stage is terminated when the desired acetic acid concen- tration above 15% is reached. In the basic embodiment of the process, the two fermentation stages are carried out in separate tanks. In another embodiment, an initial part of the first fer- mentation stage is carried out in a first tank and the final part of the first stage is then carried out in a second tank in which the second fermentation stage will ultimately also take place.
268545
Ebner Heinrich
Enenkel Anton
LandOfFree
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