algerian journal of environmental science and technology
Volume 2, Numéro 1, Pages 40-45

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

Authors : Mokdad ‎ K . Mesbaiah F.z. ‎ . Eddouaouda K . Badis A .

Abstract

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.‎

Keywords

Biosurfactant ;‎ Thermophilic bacterial ‎strain; ‎ Characterization ; ‎ Olive oil mill effluent.‎

Planomonospora Sp. Pm18: Isolation And Taxonomy Of New Actinobacterial Strain Isolated From Algerian Saharan Soil

Chaabane Chaouch Fawzia .  Bouznada Khaoula .  Bouras Noureddine .  Tata Samira .  Meklat Atika .  Mokrane Salim .  Lamari Lynda .  Kemassi Abdellah .  Mathieu Florence .  Sabaou Nasserdine . 
pages 16-23.


Identification Of Bacterial Strains Isolated From The Traditional Date Product “btana” Produced In South Regions Of Algeria.

Abekhti Abdelkader .  Taminau Bernard .  Djebbar Abla .  Crevecoeur Sebestian .  Daube Georges . 
pages 11-26.