Utilisation Of Agro Alimentary Wastes For Bio Surfactants ‎production By A Thermophilic Bacterial Strain Novelty ‎isolated From An Algerian Crude Oil Contaminated Soil

Résumé: In this work we have undertaken a study based on the production ‎and characterization of biosurfactants from a thermophilic ‎bacterial strain bacteria isolated from soil contaminated with ‎petroleum hydrocarbons. The results indicate a reduction in the ‎surface tension (32 mN /m) by the strain 1J. The influence of ‎various parameters (carbon source, nitrogen source, pH, ‎salinity) on the emulsifying activity and the surface tension ‎reduction revealed that the olive oil mill effluent (0.5%) and ‎ammonium chloride present the best carbon and nitrogen ‎sources for biosurfactant production by this strain. The maximum ‎of biosurfactant production was obtained at near neutral pH and ‎a salinity of 2%. The biosurfactant produced by our strain ‎improved a resistance to extreme conditions of temperature (4 to ‎‎121°C), pH (2-12) and salinity (up to 250 g / l). These interesting ‎characteristics of our local biosurfactant find numerous ‎applications in various food areas.‎

Publié dans la revue: algerian journal of environmental science and technology