Bacterial Bioremediation of Surficial Oil- Contaminated Soil in Tabriz Refinery Campus

Nowadays, the use of bacteria to clean oil pollution from water and soil has been considered by scientists and this method is more economical than other methods and does not cause toxic compounds in the environment.

In the present study, the results of the bioremediation process have been presented to identify the most optimal bacterial isolates of petroleum degraders in physicochemical and textural conditions of contaminated soil of Tabriz refinery. Gas chromatographic analysis with thermal detection (Gc-FID) was used to evaluate the removal rate of hydrocarbons.

The 7 isolates of bacteria were purified in this study. A Pseudomonas isolate was introduced as a strain with the highest efficiency.

 Discussion and Conclusion

After 30 days, as a result of Pseudomonas and Acinetobacter performance, the amount of TPH in contaminated soil samples was decreased in rate of 65.25 and 42.39 percent, respectively. Based on this investigation, the Bacterial Bioremediation method to clean up contaminated soils by petroleum hydrocarbons due to simplicity of implementation, environmentally friendly, safety and low cost is highly proposed to conduct in other oil refineries in Iran.