Protease activities and final pH value of the culture media are shown in Table 1. Regarding the proteolytic activities, the highest levels were obtained by B. pumilus A1 (1100 U/ml) followed by B. licheniformis NH1 (860 U/ml), while the lowest protease activity was observed with B. cereus BG1 (231 U/ml). During fermentation, pH of the broth increased from 7.0 to 7.5–9.01.