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

Cho Young-Je (Department of Food Engineering, Sangju National University)
Chun Sung-Sook (Department of Food Science & Technology, Yeungnam University)
Publication Information
Food Science and Preservation / v.12, no.3, 2005 , pp. 299-304 More about this Journal
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.
Keywords
astringent persimmon fruits; peel tannin; wastewater;
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