Comparison of the efficiency of the inherent microorganisms (control) and hydrocarbon-degrading microorganisms (HDMs) after 30 days (a) and 60 days (b) in decreasing diesel pollution.
Note: Each datum represents the mean 7S.D. of three replicates. The statistical significance of diesel residual content between control and HDMs was represented. (*Po0.05, **Po0.01.)