Kinetic and characterization of rhamnolipid produced by Pseudomonas aeruginosa MSIC02 using glycerol as carbon source
| Autor: | Juliana R. Sousa, Jéssyca A. C. Correia, Vânia M. M. Melo, Luciana R. B. Gonçalves, Antonio J. G. Cruz |
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| Jazyk: | portugalština |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Química Nova v.37 n.3 2014 Química Nova Sociedade Brasileira de Química (SBQ) instacron:SBQ Química Nova, Volume: 37, Issue: 3, Pages: 431-441, Published: JUN 2014 Química Nova, Vol 37, Iss 3, Pp 431-441 (2014) |
| Popis: | Glycerol, a co-product of biodiesel production, was used as a carbon source for the kinetics studies and production of biosurfactants by P. aeruginosa MSIC02. The highest fermentative parameters (Y PX = 3.04 g g-1; Y PS = 0.189 g g-1, P B = 31.94 mg L-1 h-1 and P X = 10.5 mg L-1 h-1) were obtained at concentrations of 0.4% (w/v) NaNO3 and 2% (w/v) glycerol. The rhamnolipid exhibited 80% of emulsification on kerosene, surface tension of 32.5 mN m-1, CMC = 28.2 mg L-1, C20 (concentration of surfactant in the bulk phase that produces a reduction of 20 dyn/cm in the surface tension of the solvent) = 0.99 mg L-1, Γm (surface concentration excess) = 2.4 x 10-26 mol Å-2 and S (surface area) = 70.4 Ų molecule-1 with solutions containing 10% NaCl. A mathematical model based on logistic equation was considered to representing the process. Model parameters were estimated by non-linear regression method. This approach was able to give a good description of the process. |
| Databáze: | OpenAIRE |
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