Food and Bioprocess Technology

, Volume 8, Issue 2, pp 287–300 | Cite as

Production of Antioxidant Egg White Hydrolysates in a Continuous Stirred Tank Enzyme Reactor Coupled with Membrane Separation Unit

  • Sonja Jakovetić
  • Nevena Luković
  • Branimir Jugović
  • Milica Gvozdenović
  • Sanja Grbavčić
  • Jelena Jovanović
  • Zorica Knežević-Jugović
Original Paper

Abstract

The objective of this research was to design an efficient continuously operated membrane reactor with a separation unit for egg white protein (EWP) hydrolysis and production of hydrolysates with improved antioxidant properties. For this purpose, a mechanically stirred tank reactor coupled with the polyethersulfone ultrafiltration module with a molecular weight cutoff of 10 kDa was employed. Several proteolytic enzymes have been tested in order to obtain the best quality of peptide-based formulations intended for human consumption. Among protease from Bacillus licheniformis (Alcalase), protease from Bacillus amyloliquefaciens (Neutrase), and protease from papaya latex (papain), the highest degree of hydrolysis (DH), as well as the best antioxidant properties of obtained hydrolysates, was achieved with Alcalase. The effects of operating variables such as enzyme/substrate ([E]/[S]) ratio, impeller speed, and permeate flow rate were further studied using response surface methodology (RSM) and Box–Behnken experimental design. Results obtained in RSM analysis confirmed that over the studied range [E]/[S] ratio, impeller speed and permeate flow rate had the significant effect on the DH and reactor capacity. The effects of different impeller geometries were also studied and four-bladed propeller stirrer enabled the highest DH. Antioxidant properties were analyzed by the 2,2-diphenyl-1-picrylhydrazyl (DPPH), by the 2,2′-azino-bis-(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS) radical scavenging activity, and by the linear voltammetry methods. Results show that the use of Alcalase in the membrane reactor system is of potential interest for the EWP hydrolysis and obtaining value-added egg products.

Keywords

Egg white protein hydrolysis Proteases Continuous membrane reactor Polyethersulfone ultrafiltration module Response surface methodology Antioxidant properties 

Notes

Acknowledgments

This work was supported by Grant numbers E!6750 and III 46010 from the Ministry of the Education, Science and Technological Development, Republic of Serbia. The authors would like to thank the project partner Jata Emona d.o.o. (Ljubljana, Slovenia) for providing us with pasteurized egg white samples.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • Sonja Jakovetić
    • 1
  • Nevena Luković
    • 1
  • Branimir Jugović
    • 2
  • Milica Gvozdenović
    • 1
  • Sanja Grbavčić
    • 3
  • Jelena Jovanović
    • 1
  • Zorica Knežević-Jugović
    • 1
  1. 1.Faculty of Technology and MetallurgyUniversity of BelgradeBelgradeSerbia
  2. 2.Institute of Technical ScienceSerbian Academy of Science and ArtsBelgradeSerbia
  3. 3.Innovation Center of Faculty of Technology and MetallurgyUniversity of BelgradeBelgradeSerbia

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