Table 1.

Physicochemical properties of biosurfactants from bacteria under study.

Bacterial strains	Surface tension values (mN m-1)	Rhamnolipid content (g l-1)	CMC values (mg l-1)	EI values of petrol	EI values of diesel
IMP66	31.93 ± 0.04	0.8 ± 0.02	100	50	60
IMP67	29.85 ± 0.07	3.8 ± 0.1	50	70	80
IMP68	31.27 ± 0.06	4.2 ± 0.04	80	60	65
Pseudomonas aeruginosa PAO1	31.23 ± 0.07	2.8 ± 0.04	60	65	70