Production of sophorolipids by Candida bombicola grown on soy molasses as substrate*,** |
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Authors: | Daniel K.Y. Solaiman Richard D. Ashby Alberto Nuñez Thomas A. Foglia |
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Affiliation: | Fats, Oils and Animal Coproducts Research Unit, Eastern Regional Research Center, Agricultural Research Service, U.S. Department of Agriculture, 600 East Mermaid Lane, Wyndmoor, PA 19038, USA. dsolaiman@errc.ars.usda.gov |
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Abstract: | Sophorolipids (SLs) were produced from Candida bombicola using soy molasses and oleic acid as co-substrates. The purified SLs were obtained at 21 g l(-1) and were 97% in lactone form. The major SL constituent (81% relative abundance) of the product mixture contains an oleoyl chain. The surface properties of the SLs obtained from the soy molasses/oleic acid fermentation had minimum surface-tension values of 37 mN m(-1) (pH 6) and 38 mN m(-1) (pH 9), and critical micelle concentration values of 6 mg l(-1) (pH 6) and 13 mg l(-1) (pH 9). |
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Keywords: | biosurfactant Candida bombicola soy solubles |
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