KSBB Journal

The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Concentration of Fresh Gel from Aloe vera L. by Using Ultrafiltration Process

한외여과 공정에 의한 알로에 베라 겔 농축

  • 백진홍 ((주)김정문알로에 과학연구소) ;
  • 김성아 ((주)김정문알로에 과학연구소) ;
  • 이신영 (강원대학교 생물공학과)
  • Published : 2008.04.29
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Abstract

The concentration of fresh gel from Aloe vera L. by using ulfrafiltration (UF) process was investigated and analyzed. The two membranes (organic and ceramic) with different molecular weight cut-off (MWCO) and modules (flat sheet and tubular) was used. Under optimum operation conditions, ceramic (zirconium dioxide) tubular membrane with MWCO of 50 kDa resulted in higher flux, less fouling, more turbid, higher total solid, higher polysaccharide and less aloin content. Optimum operation conditions were transmembrane pressure of 1.0 bar, feed velocity of 240 L/hr and temperature of $23^{\circ}C$. Volume concentration factor of aloe gel was 3.13 at permeate flux of $51.1\;L/m^2{\cdot}hr$ after processing time of 1.66 hr. Aloin in fresh aloe gel by UF process was effectively removed as permeate and bioactive polysaccharide content was 2.1 times higher than that of fresh aloe gel. These results allowed a very good level of concentration degree and polysaccharide content. Thus, ultrafiltration process of this study was suitable for the concentration of fresh aloe gel though the aloe concentrate showed both the viscosity decrease and partially separation of liquid layer during storage at $4^{\circ}C$.

Keywords

References

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