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Oil Wastes as Unconventional Substrates for Rhamnolipid Biosurfactant Production by Pseudomonas a eruginosa LBI
Author(s) -
Nitschke Marcia,
Costa Siddhartha G. V. A. O.,
Haddad Renato,
G. Gonçalves Lireny A.,
Eberlin Marcos N.,
Contiero Jonas
Publication year - 2005
Publication title -
biotechnology progress
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.572
H-Index - 129
eISSN - 1520-6033
pISSN - 8756-7938
DOI - 10.1021/bp050198x
Subject(s) - rhamnolipid , chemistry , yield (engineering) , substrate (aquarium) , soybean oil , cottonseed , critical micelle concentration , pulmonary surfactant , pulp and paper industry , food science , micelle , pseudomonas aeruginosa , organic chemistry , bacteria , materials science , biology , biochemistry , aqueous solution , ecology , genetics , engineering , metallurgy
Abstract Oil wastes were evaluated as alternative low‐cost substrates for the production of rhamnolipids by Pseudomonas aeruginosa LBI strain. Wastes obtained from soybean, cottonseed, babassu, palm, and corn oil refinery were tested. The soybean soapstock waste was the best substrate, generating 11.7 g/L of rhamnolipids with a surface tension of 26.9 mN/m, a critical micelle concentration of 51.5 mg/L, and a production yield of 75%. The monorhamnolipid RhaC 10 C 10 predominates when P. aeruginosa LBI was cultivated on hydrophobic substrates, whereas hydrophilic carbon sources form the dirhamnolipid Rha 2 C 10 C 10 predominantly.