Extract Residual as Nutrient Source for the Production of Sophorolipids Compounds by Marine Yeast .

Seaweed processing generates liquid fraction residual that could be used as a low-cost nutrient source for microbial production of metabolites. The strain is able to produce antimicrobial compounds known as sophorolipids. Our aim was to evaluate sophorolipid production, with antibacterial activity, by marine using liquid fraction residual (LFR) from the brown seaweed as the nutrient source. LFR having a composition of 32% / carbohydrate, 1% / lipids, 15% / protein and 52% / ash. The best culture condition for sophorolipid production was LFR 40% /, without yeast extract, artificial seawater 80% / at 15 °C by 3 growth days, with the antibacterial activity of 24.4 ± 3.1 % on and 21.1 ± 3.8 % on It was possible to identify mono-acetylated acidic and methyl ester acidic sophorolipid. These compounds possess potential as pathogen controllers for application in the food industry.