Kinetic and characterization of rhamnolipid produced by Pseudomonas aeruginosa MSIC02 using glycerol as carbon source

Química Nova

Sousa, Juliana R.¹  Gonçalves, Luciana R. B.¹  Cruz, Antonio J. G.¹  Correia, Jéssyca A. C.¹  Universidade Federal de São Carlos, São Carlos, Brasil¹  Melo, Vânia M. M.¹  Universidade Federal do Ceará, Fortaleza, Brasil¹ 

关键词: rhamnolipid;    kinetics;    micellization.;   

DOI  :  10.5935/0100-4042.20140064

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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 (YPX = 3.04 g g-1; YPS = 0.189 g g-1, PB = 31.94 mg L-1 h-1 and PX = 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 Å2 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.

【 授权许可】

Unknown