Microscopically observations for Rhodotorula sp biodegradation to crude and exhausted oil

الملخص

       In this present study Benghazi Lake or 23^rd  of July Lake is considered as the major environmental and ecological problematic as results of several contaminations. A Success isolated of Rhodotorula strain from Benghazi Lake by three tested media of solid and broth, it cultivated for 2-4 weeks. The results are shown that it has highly degradable of crude oil and their derivatives reached about of 70-80 % during 1-2 weeks, while it has degraded to exhausted fuel oil of 95% for 7-10 days. The observations of two media 1, and 2 had visibility differences, whereas  the examination by light Microscope were closed similarity, due to the structure of slimy capsulated; it may be enhanced to the production of biosurfactant. A solubility test is confirmed that the ball shaped formation of medium 2 has structured of viscosity and biogases.  So this study has shown that a novel strain of Rhodotorula sp is promising to use in the bioremediation for the degradation of petroleum, their derivatives and exhausted fuel oil.