Abstract
7cfu/ml, while for LG2 it was 1.63 x 10 7 cfu/ml. In the two cases slight but consistent pH drops to < 6.51 were observed. LG1 had a growth rate of 0.38 d -1 and doubling time 1.83 d. The corresponding values for LG2 during the first log phase were 0.58 d -1 and 1.19 d, respectively, while in the second log phase the values were 0.14 d -1 and 5.13 d Gas chromatographic analysis showed that chrysene was degraded by LG and LG2 by 92.91 and 80.25%, respectively, anthracene by 92.21 and 91.53%, respectively, and Benzo (b) fluoranthene was degraded by 77.19 and 98.41%, respectively. LG2 had a higher degradative capability of the polyaromatic fractions with 80.15% while LG I was lower at 52.33%. Statistical analysis showed that there was a significant difference (p < 0.05) in the degradation of various aromatic components of the oil by LG1 and LG2.
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