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Table 3 Indication of the biosurfactants that showed the best demulsification results identified by the statistical tests

From: Yeasts and bacterial biosurfactants as demulsifiers for petroleum derivative in seawater emulsions

Biosurfactant concentration Demulsification of motor oil (%) by the biosurfactants produced
Distilled water Sea water
Cell-free broth P. aeruginosa (44.0 ± 0.5) P. aeruginosa (50.0 ± 0.6)
½ CMC Bacillus sp. (46.6 ± 0.9) P. cepacia (45.0 ± 0.9)
CMC P. aeruginosa (48.0 ± 0.9) Bacillus sp. (54.4 ± 0.9)
2 × CMC P. aeruginosa (62.0 ± 0.9) Bacillus sp. (66.0 ± 0.9)