Figure 2: The growth of four microorganism strain (D1.1, D1.3, D1.4, and D1.6) on mineral salts liquid medium. Culturing process were conducted by culturing 1 ml of the sample of four strains isolated with 50 ml of mineral salts liquid medium with 100 mg/liter phenol as only the sole source carbon and energy. After a appropriate time, the phenol concentrations (mg/liter), the total cells (cells×108/ml), and the total protein (mg/ml) were analyzed as described in Materials and Methods. Symbols: , phenol concentrations in the culture medium at the time of inspection;, total cell numbers of bacteria at the time of inspection; , total protein concentrations at the time of inspection.