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TitleImprovement of biosurfactant production by Wickerhamomyces anomalus CCMA 0358 and its potential application in bioremediation
Author(s)Souza, K.
Gudiña, Eduardo J.
Schwan, Rosane F.
Rodrigues, L. R.
Dias, Disney R.
Teixeira, J. A.
KeywordsWickerhamomyces anomalus
Response surface methodology
Issue date15-Mar-2018
JournalJournal of Hazardous Materials
CitationSouza, K.; Gudiña, Eduardo J.; Schwan, Rosane F.; Rodrigues, Lígia R.; Dias, Disney R.; Teixeira, José A., Improvement of biosurfactant production by Wickerhamomyces anomalus CCMA 0358 and its potential application in bioremediation. Journal of Hazardous Materials, 346, 152-158, 2018
Abstract(s)In this work, biosurfactant production by Wickerhamomyces anomalus CCMA 0358 was increased through the development of an optimized culture medium using response surface methodology. The optimized culture medium contained yeast extract (4.64 g/L), ammonium sulfate (4.22 g/L), glucose (1.39 g/L) and olive oil (10 g/L). Biosurfactant production using this medium was validated both in flasks and bioreactor, and the surface tension was reduced from 49.0 mN/m up to 31.4 mN/m and 29.3 mN/m, respectively. In both cases, the highest biosurfactant production was achieved after 24 h of growth. W. anomalus CCMA 0358 demonstrated to be a fast biosurfactant producer (24 h) as compared to other yeast strains previously reported (144-240 h). The produced biosurfactant remained stable at high temperature (121ºC), NaCl concentrations as high as 300 g/L, and pH values between 6 and 12. The crude biosurfactant allowed the recovery of 20% of crude oil from contaminated sand, being a promising candidate for application in bioremediation or in the petroleum industry.
Publisher version
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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