Ultrafiltration of Soybean Curd Whey for the Separation of Functional Components

유용성 물질의 분리를 위한 두부순물의 한외여과

  • 서성희 (서울대학교 생활과학대학 식품영양학과) ;
  • 황인경 (서울대학교 생활과학대학 식품영양학과)
  • Published : 1997.11.01

Abstract

To separate and concentrate functional components contained in soybean curd whey, ultrafiltration was performed using regenerated cellulose or polysulphone membrane of spiral-wound type with MWCO 10,000, and the permeate and retentate solutions were analyzed. As the pH of soybean curd whey increased, the permeate flux decreased in both membranes. Treatment of 0.01 M EDTA rather decreased the permeate flux compared with control. The concentration of ionic calcium, which decreased with the pH increase, was thought to affect the permeate flux also. In case of polysulphone membrane, the permeate was efficiently purified and the retentate protein was concentrated significantly in which the membrane rejection value (MRV) for chemical oxygen demand (COD) was 79.25% and that of protein was 98.42% at the volume concentration ratio (VCR) of 10. MRV of the protein of regenerated cellulose membrane was lower than that of polysulphone membrane. To recover oligosaccharides to the permeate solution and increase the content of raffinose and stachyose, regenerated cellulose membrane was more suitable than polysulphone membrane and the optimum VCR was 4.