Results
pH kinetics
The pH kinetics are shown in figure 1. The pH values
varied throughout fermentation in the four tested media.
M1, M2 and M3 maintained pH values of approximately
6-7 during the first 10 h; however, medium M4 maintained
a low pH value of approximately 5 during the
first 6 h. After these periods, the pH values increased
from 6-7 to 7-9 by 72 h of fermentation in all of the media
tested.