Nitrogen (1%) EI (oil) ( %) EI( diesel) (%) ODA (cm) DCA NaNO3 43 ± 0.15 22 ± 0.09 3 ± 0.15 ++ Peptone 40 ± 0.10 20 ± 0.12 3 ± 0.01 ++ Yeast 45 ± 0.61 23 ± 0.13 4 ± 0.75 +++ malt 37 ± 0.23 17 ± 0.21 2 ± 0.93 +

Table 2: Influence of nitrogen content (1%) for biosurfactant production 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).