Effect of Wastewater Treatment with Tannins from Peel of Astringent Persimmon Fruits

떫은감 껍질로부터 분리한 탄닌을 이용한 폐수처리 효과

  • Cho Young-Je (Department of Food Engineering, Sangju National University) ;
  • Chun Sung-Sook (Department of Food Science & Technology, Yeungnam University)
  • 조영제 (상주대학교 식품공학과) ;
  • 천성숙 (영남대학교 식품가공학과)
  • Published : 2005.06.01

Abstract

The two major tannins were separated by Sephadex LH-20 and MCI-gel CHP-20 from peel of astringent persimmon fruits. Purified tannins were identified to (+)-catechin and (+)-gallocatechin by NMR, IR spectrum and FAB-mass spectrum. The removal rate of turbidity, T-N, T-P and CODcr in wastewater with lime and (+)-gallocatechin was higher than those of (+)-catechin because (+)-gallocatechin has more hydroxyl groups. As increasing concentration of tannins from peel of astringent persimmon fruits, the removal rate of turbidity, T-N, T-P and CODcr were increased. Synergistic activity by mixed tannins(catechin+gallocatechin) was also observed.

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