Combined intervention of static magnetic field and growth rate of Microbacterium maritypicum CB7 for Benzo(a)Pyrene biodegradation.

In this work, we have shown for the first time that Microbacterium maritypicum CB7 bacterium is capable to use Benzo(a)Pyrene as a sole source of carbon and energy. We followed the growth kinetics of M. maritypicum CB7 in minimum medium supplemented with 10 mg/l Benzo(a)Pyrene for 30 days. The results obtained showed that M. maritypicum CB7 strain is able to degrade 69% of the initial amount of BaP. In order to improve the rate of biodegradation, we tested for 5 days the effect of a static magnetic field (SMF) at different inductions (50, 100 and 200 mT) on the degradation kinetics of Benzo(a)Pyrene by M. maritypicum CB7. Indeed, at 200 mT, we observed an increase of the yield by the twice of Benzo(a)Pyrene biodegradation rate compared to the non-induced sample. This study shows the important potential of M. maritypicum CB7 for the bioremediation of Benzo(a)Pyrene in the environment and the importance of the application of a SMF to yield the performance of the process suggesting its potential application in bioremediation of polluted sites with hydrocarbons compounds.