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Table 1 Effect of aeration and hydrocarbons on bioemulsifier production

From: Novel bioemulsifier produced by a Paenibacillus strain isolated from crude oil

Medium ST (mN/m) E 24 (%) [Emulsifier] (g/l) [Biomass] (g/l)
Anaerobic (120 rpm)
MSS 52.9 ± 1.5 36.4 ± 4.4 5.0 ± 0.5 0.437 ± 0.086
MSS + Paraffin 51.1 ± 1.8 43.1 ± 3.1 5.6 ± 0.2 0.523 ± 0.043
MSS + Crude Oil 50.6 ± 1.4 42.1 ± 2.1 5.4 ± 0.4 0.496 ± 0.091
Aerobic (120 rpm)
MSS 51.1 ± 0.9 49.9 ± 2.7 6.1 ± 0.2 0.846 ± 0.112
MSS + Paraffin 50.1 ± 1.6 64.4 ± 1.6 7.9 ± 0.1 0.904 ± 0.099
MSS + Crude Oil 50.0 ± 0.6 62.1 ± 2.5 7.4 ± 0.3 0.885 ± 0.121
  1. Surface tension values (mN/m), emulsifying activity (E24, %) and biomass and bioemulsifier concentrations (g/l) obtained with Paenibacillus sp. #510 grown at 40°C under aerobic (7 days) and anaerobic (10 days) conditions in MSS and MSS supplemented with paraffin (5% w/v) or crude oil (5% w/v). The emulsifying indexes were performed using n-hexadecane. The surface tension and the emulsifying activity of MSS medium were 70.3 ± 0.4 mN/m and 0.0%, respectively. Results represent the average of three independent experiments  ±  standard deviation.