Abstract
The success of biosurfactant production depends on the development of cheaper processes based on the use of low cost raw materials, which account for 10–30% of the overall process cost. In Brazil, the cashew apple agroindustry plays an outstanding role in the local economy. However, only a small part of the pseudofruit produced is used industrially and the amount wasted (about 94%) presents high potential as fermentation media, since it is rich in carbohydrate, fibers, vitamins and minerals salts. In this work, the performance of cashew apple juice (CAJ) as a complex medium for Acinetobacter calcoaceticus growth and production of biosurfactant was investigated. The microorganism was able to grow and to produce biosurfactant on a defined culture medium and on CAJ, reducing the surface tension of both media. The biosurfactant also achieved a maximum emulsion index of 80% for kerosene, when defined medium was used.
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