pH range EI (oil) (%) EI (diesel) (%) ODA (cm) DCA 3 37 ± 0.09 14 ± 0.28 2.2cm + 4 40 ± 0.05 19 ± 0.04 3.3 cm + 5 4 ± 0.30 22 ± 0.07 3.9cm ++ 6 45 ± 0.03 23 ± 0.80 4.1m ++ 7 45 ± 0.09 23 ± 0.9 4.8cm +++ 8 47 ± 0.61 38 ± 0.09 5.5 +++ 9 45 ± 0.07 30 ± 0.45 5.3 +++ 10 44 ± 0.10 25 ± 0.03 4.7 ++ 11 43 ± 0.01 18 ± 0.18 4.1 ++ 12 38 ± 0.09 15 ± 0.03 3.4 +

Table 4: Influence of different pH values for production of biosurfactant in terms of EI: Emulsification Index; ODA: Oil Displacement Assay; DCA: Drop Collapse Assay; (+: less dispersed drop; ++: moderate dispersed drop; +++ highly dispersed drop of surfactant).