Soy Protein Peptide Solution Purification by Membrane Separation Technology

Crude soy protein peptide hydrolysate features dark color, high turbidity and numerous macromolecular impurities, which downgrade final peptide product quality. Membrane separation technology including ultrafiltration and nanofiltration offers a physical, non‑thermal purification solution. Ultrafiltration removes macromolecular proteins, colloids and pigments to obtain clear peptide filtrate. Subsequent nanofiltration achieves further desalination and concentration. This article introduces process selection, practical effect and core advantages of membrane filtration for soy peptide clarification, providing references for industrial‑scale plant polypeptide production.