Degradation of polyaromatic hydrocarbons employing biosurfactant-producing Bacillus pumilus KS2

Annals of Microbiology

Table 1 Surface tension measurements^a of the bacterial isolate on glucose-containing mineral medium at different time intervals

Bacterial isolates	ST at 0 h	ST at 24 h of culture	ST at 48 h of culture	ST at 72 h of culture	ST at 96 h of culture	ST at 120 h of culture
C^b	71.1 ± 0.30	71.0 ± 0.24	71.0 ± 0.40	69.9 ± 0.30	69.9 ± 0.23	69.8 ± 0.27
KS1	67.9 ± 0.40	69.4 ± 0.44	66.5 ± 0.43	65.0 ± 0.31	65.0 ± 0.33	65.2 ± 0.23
KS2^c	59.1 ± 0.30	48.5 ± 0.0.25	38.5 ± 0.30	40.2 ± 0.25	41.7 ± 0.15	43.7 ± 0.25
KS3^c	60.8 ± 0.30	45.8 ± 0.44	31.4 ± 0.22	34.5 ± 0.23	36.9 ± 0.24	41.8 ± 0.28
KS4	69.8 ± 0.12	68.5 ± 0.17	60.1 ± 0.24	60.0 ± 0.43	62.7 ± 0.41	62.8 ± 0.31
KS5	60.8 ± 0.15	57.7 ± 0.21	54.4 ± 0.16	57.8 ± 0.23	57.0 ± 0.16	57.3 ± 0.26
KS6	69.4 ± 0.16	59.2 ± 0.24	58.6 ± 0.22	57.1 ± 0.35	56.2 ± 0.40	56.1 ± 0.30
KS7^c	62.9 ± 0.40	47.4 ± 0.21	33.4 ± 0.41	37.3 ± 0.12	41.2 ± 0.31	44.3 ± 0.22
KS8	68.8 ± 0.12	60.5 ± 0.17	54.1 ± 0.24	57.8 ± 0.43	60.7 ± 0.41	62.8 ± 0.31
KS9^c	59.4 ± 0.30	44.5 ± 0.25	32.5 ± 0.30	38.3 ± 0.25	42.8 ± 0.15	44.3 ± 0.25
KS10	63.8 ± 0.15	58.4 ± 0.21	50.2 ± 0.16	52.7 ± 0.23	56.1 ± 0.16	57.3 ± 0.26
KS11	68.3 ± 0.14	62.2 ± 0.24	58.6 ± 0.22	57.1 ± 0.35	59.2 ± 0.40	61.7 ± 0.30
KS12^c	60.9 ± 0.41	45.4 ± 0.23	3.3 ± 0.27	38.4 ± 0.32	42.4 ± 0.41	47.1 ± 0.12

^aSurface tension (ST) measurements (in mN/m) are given as the mean ± standard deviation (SD) of five measurements
^bAbiotic control
^cDenotes the biosurfactant-producing strains

ISSN: 1869-2044