Concentration of alpha-lactalbumin from cow milk whey through expanded bed adsorption using a hydrophobic resin

Brazilian Journal of Chemical Engineering

L. S. Conrado¹  V. Veredas²  E. S. Nóbrega²  C. C. Santana² 

[1] ,State University of Campinas School of Chemical Engineering Department of Biotechnological Process EngineeringCampinas SP ,Brazil

关键词: alpha-Lactalbumin;    Milk whey;    Expanded bed adsorption;    Fluid Dynamics;   

DOI  :  10.1590/S0104-66322005000400002

来源: SciELO

【 摘 要 】

The design of novel applications for the use of new high-density adsorbents in the direct recovery of proteins requires analysis of the fluid dynamics and mass transfer characteristics of the column used with the solid-liquid system. In this article we describe the operating parameters related to the use of a high-density, hydrophobic resin (Streamline® Phenyl) for the recovery of alpha-lactalbumin from cow milk whey in an expanded-bed adsorption mode of operation. The adsorption isotherm, kinetic curves and chromatographic curves for adsorption and elution were determined for alpha-lactalbumin recovered from whole whey. The experiments were used to confirm the theoretical model that involves the combination of resistance to the mass transfer in the liquid phase and diffusivity in the adsorbent resin pores. The model solution was obtained through the orthogonal collocation method. A nonlinear multivariable optimization method was used to fit the model to experimental results. A purity of 79% was obtained with the adsorption/elution protocol prior to any polishing procedure.

【 授权许可】

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