BIOSURFACTANT (Isolate) aRECOVERED OIL (mL)
Pseudomonas Aeruginosa LBBMA 88A
Bacillus sp. LBBMA 111A
Dietzia maris sp. LBBMA 191
Arthrobacter oxydans LBBMA 201
Bacillus subtilis LBBMA 155
CONTROL
41.10 ± 0.20  (93.40) ab
39.00 ± 0.11 (88.63) bc
42.00 ± 0.21 (95.45) a
40.30 ± 0.10  (91.59) ab
37.00 ±0.14  (84.09) c
0.88 ± 0.16   (2.00)     d
aThe data represent the average ± standard deviations for two duplicates. Averages followed by the same letter are not significantly different (Tukey’s test at 5% of probability). bNumber in parenthesis represent the percent volume of oily sludge recovered as oil.
Table 2: Recovery of oil from oily sludge collected from fuel oil storage tanks after mixing with biosurfactant solutions produced by different microbial isolates.