Highest activities (Table 1) towards BS production were fund when CG (6 g/l) was used in cultivation of BsTD4 and PaSU7. Although CG (6 g/l) could not give the highest value of dry cell weight, especially in case of BsTD4: excreted BSs displayed good surface activities in terms of ST reduction and BS yield. Therefore, MSM supplemented with CG (6 g/l) was chosen as appropriate culture medium for next experiments of BS production by two bacterial strains. Currently, a very important renewable C source is CG. Increase inn biodiesel production is generating large quantities of CG. With the production of 10 kg of biodiesel from repeseed oil, 1 kg of CG becomes available and its price is decreasing and tends to decrease even more as traditional CG markets become saturated.