Biosurfactant production by Rhodotorula glutinis: Emulsifying property and stability

This study aimed to evaluate the biosurfactant production and their stability against pH, temperature and salinity, industrial waste being used as a source of carbon and nitrogen. We used the yeast R. glutinis. The production was performed in Erlenmeyer flasks (250 ml) containing 100 ml of DCCR average production according to an experimental. The best condition, based on surface tension, was selected for testing interfacial tension, emulsification index, stability and extraction. We determined the surface and interfacial tension of the net metabolic and cell-free and obtained from 34.01 mN/m and 14.7 mN/m, respectively. Were obtained emulsification index of 70% for motor oil and 100% for burning waste vegetables. The results show the importance of waste as an alternative to the production of biosurfactant and the biosurfactant ability to remain stable under the conditions tested.