Whey protein partitioning in aqueous two-phase systems

Authors

DOI:

https://doi.org/10.18633/biotecnia.v23i3.1263

Keywords:

ATPE, high throughput screening, lactose separation, protein/(NH4)2SO4 system, whey proteins

Abstract

Whey is a by-product of cheese manufacturing that has proteins that can be recovered, but they are very diluted and in a mixture with lactose, which limits their use. The aqueous two-phase extraction technique (ATPE) is a procedure with potential to separate proteins. The objective was to evaluate the behavior of an aqueous protein-(NH4)2SO4 extraction system applied for the recovery of whey proteins, considering the reduction of lactose. A binodal phase diagram was constructed using a high throughput screening technique. Ammonium sulfate was dissolved at concentrations between 22 and 40 % using whey as solvent. The volume of the top phase of the systems was less than that of the bottom one, but the increase in (NH4)2SO4 caused a gradual increase at the top phase. Around 80 % of whey protein concentrated at the top phase, while over 79 % of lactose was at the bottom phase. The ATPE technique has the potential to separate proteins from whey and the best alternative is based on systems with 34 % (NH4)2SO4.

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Author Biographies

Salvador Valle Guadarrama, Universidad Autónoma Chapingo

Profesor Investigador-Departamento de Ingeniería Agroindustrial

Ricardo Domínguez Puerto, Universidad Autónoma Chapingo

Profesor-Investigador Universidad Autónoma Chapingo, Departamento de Preparatoria Agrícola

Diana Guerra Ramírez, Universidad Autónoma Chapingo

Profesora-Investigadora Universidad Autónoma Chapingo, Departamento de Preparatoria Agrícola

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Published

2021-10-20

How to Cite

Valle Guadarrama, S., Domínguez Puerto, R., & Guerra Ramírez, D. (2021). Whey protein partitioning in aqueous two-phase systems. Biotecnia, 23(3). https://doi.org/10.18633/biotecnia.v23i3.1263

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