Electrodialytic separation of peptides from snow crab by-product hydrolysate: Effect of cell configuration on peptide selectivity and local electric field

Research output: Contribution to journalJournal articleResearchpeer-review

  • Shyam Suwal
  • Cyril Roblet
  • Alain Doyen
  • Jean Amiot
  • Lucie Beaulieu
  • Jean Legault
  • Laurent Bazinet
Electrodialysis with ultrafiltration membrane (EDUF) has been successfully used to separate bioactive peptides from various food protein hydrolysates. Nevertheless, EDUF process was found to be affected by permeate and feed pHs, electric field strength and membrane materials, molecular weight cuf-off (MWCO) as well as surface area. In the present study, the effect of two EDUF cell configurations was examined on different electrodialytic parameters; first with one feed and two recovery compartments and second with two feed and one recovery compartments. The EDUF cell configurations had significant effect on peptide migration rate and selectivity such as amino acid composition and peptide molecular weight profiles of the permeate fractions obtained after 6 h of EDUF treatment. The configuration 1 led to the higher total peptide migration rate of 6.00 ± 0.12 g/(h m2) in comparison to 4.41 ± 0.20 g/(h m2) for configuration 2. However, in configuration 1, the local electric field in the hydrolysate compartment decreased linearly throughout EDUF process which limited peptide migration after about 2 h of EDUF treatment. Amino acid analysis of permeate fractions showed that anionic amino acids primarily Glu, Tau, Met and Phe were concentrated in both peptide recovery compartments of configuration 1, while cationic amino acids like Arg and Lys were mainly concentrated in peptide recovery compartment of configuration 2. © 2014 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalSeparation and Purification Technology
Pages (from-to)29-38
Number of pages10
DOIs
Publication statusPublished - 30 Apr 2014

    Research areas

  • Cell configuration, Electrodialysis with ultrafiltration membrane, Snow crab byproduct hydrolysate

ID: 204114284