"Biosurfactants are defined as the surface-active biomolecules produced by microorganisms. In recent years, biosurfactnats have attracted commercial interest due to their unique properties such as production from renewable sources, high surface activity, high specificity, low toxicity, tolerance to pH, temperature and ionic strength, biodegradability, excellent emulsifying and demulsifying ability, antimicrobial activity, ability to work under extreme conditions, and relative ease of preparation. Biosurfactants have found applications in several industries including organic chemicals, petroleum, petrochemicals, mining, metallurgy (mainly bioleaching), agrochemicals, fertilizers, foods, beverages, cosmetics, pharmaceuticals and many others"--