Results and Discussion
In this work two bacterial strains Ralstonia picketti SRS and Alcaligenes piechaudii SRS were used to degrade crude oil and its distillation products. The results making the investigated strains interesting for bioremediation is their ability to simultaneously degrade petroleum compounds and produce biosurfactants. Their properties to produce biosurfactant and simultaneously degrade BTE X hydrocarbons were reported earlier [28, 30]. The isolates were selected based on their ability to produce biosurfactants while growing in culture media with aliphatic and aromatic hydrocarbons.