Naphthalene degradation and biosurfactant activity by Bacillus cereus 28BN.
Biosurfactant activity and naphthalene degradation by a new strain identified as Bacillus cereus 28BN were studied. The strain grew well and produced effective biosurfactants in the presence of n-alkanes, naphthalene, crude oil and vegetable oils. The biosurfactants were detected by the surface tension lowering of the medium, thin layer chromatography and infrared spectra analysis. With (2%) naphthalene as the sole carbon source, high levels of rhamnolipids at a concentration of 2.3 g 1(-1) were determined in the stationary growth. After 20 d of incubation 72 +/- 4% of the initial naphthalene was degraded. This is the first report for a Bacillus cereus rhamnolipid producing strain that utilized naphthalene under aerobic conditions. The strain looks promising for application in environmental technologies.
Tuleva
Borjana
B
Institute of Microbiology, Bulgarian Academy of Sciences, Acad. G. Bonchev str, bl 26, 1113 Sofia, Bulgaria.
Christova
Nelly
N
Jordanov
Bojidar
B
Nikolova-Damyanova
Boryana
B
Petrov
Petar
P
D001409:Bacillus cereus / Q000145:classification / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002855:Chromatography, Thin Layer; D006017:Glycolipids / Q000737:chemistry / Q000378:metabolism; D007220:Industrial Waste; D008823:Micelles; D009281:Naphthalenes / Q000493:pharmacokinetics*; D013501:Surface-Active Agents
D006017:Glycolipids; D007220:Industrial Waste; D008823:Micelles; D009281:Naphthalenes; D013501:Surface-Active Agents; C418382:rhamnolipid; C031721:naphthalene