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Table 4 Crude oil removal efficiencies of fermentation both containing biosurfactants from BB and BU media

From: Production of lipopeptide biosurfactants by Bacillus atrophaeus 5-2a and their potential use in microbial enhanced oil recovery

Medium Crude oil removal
Filter paper Sand
Removal efficiency (RE p  %) RE p /RE Ctrl Removal efficiency (RE s  %) RE s /RE Ctrl
Ctrl 12.8 ± 0.19c 9.3 ± 0.042c
BB 94.3 ± 0.049a 7.4 94.0 ± 0.092a 10.1
BU 93.1 ± 0.12b 7.3 90.0 ± 0.057b 9.7
  1. Values are presented as the mean ± standard deviation (n = 3). Different superscript letters within a column indicate significant differences (P < 0.05) by Duncan’s multiple range test