Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Advanced Oxidation Process for the Treatment of Terephthalic Acid Wastewater using UV, H2O2 and O3 : Organic and Color Removal Studies

UV, H2O2, 오존을 이용한 고급산화공정에서의 테레프탈산 제조공정 폐수 처리 : 유기물 및 색도제거 연구

  • Kwon, Tae-Ouk (Department of Chemical Engineering, Sunchon National University) ;
  • Park, Bo-Bae (Department of Chemical Engineering, Sunchon National University) ;
  • Moon, Il-Shik (Department of Chemical Engineering, Sunchon National University)
  • 권태옥 (순천대학교 공과대학 화학공학과) ;
  • 박보배 (순천대학교 공과대학 화학공학과) ;
  • 문일식 (순천대학교 공과대학 화학공학과)
  • Received : 2007.05.23
  • Accepted : 2007.07.30
  • Published : 2007.12.31
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Abstract

UV/H_2O_2$, $O_3$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ processes were tested for the removal of COD and color from terephthalic acid wastewater. COD removal efficiencies were 10, 48, 56, 63% in the $UV/H_2O_2$, $O_3$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ process respectively. Color removal efficiency of $UV/H_2O_2$ process was 80% and $O_3$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ processes were almost more than 99%. Terephthalic acid, isophthalic acid and benzoic acid were completely destructed in terephthalic wastewater within 120 min by $UV/H_2O_2/O_3$ process and shows high COD and color removal efficiencies. The optimum concentration of $H_2O_2$ dosage was found to be 0.5 M, 25 mM and 5 mM for $UV/H_2O_2$, $O_3/H_2O_2$ and $UV/H_2O_2/O_3$ processes respectively, Organic destruction efficiency was enhanced and also reducing the consumption of $H_2O_2$ dosage by combining UV, $H_2O_2$ and $O_3$ process.

UV/H_2O_2$, $O_3$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ 공정을 이용한 테레프탈산 제조공정 폐수의 COD 및 색도제거 연구를 수행하였다. UV/H_2O_2$, $O_3$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ 공정에서의 COD 제거율은 각각 10, 48, 56, 63%, 색도 제거율은 $UV/H_2O_2$ 공정이 80%, $O_3$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ 공정은 모두 99% 이상 효과적으로 제거되는 것으로 나타났다. COD 및 색도 제거율이 가장 우수한 $UV/H_2O_2/O_3$ 공정에서 테레프탈산 제조공정 폐수의 주요 유기물 성분인 테레프탈산, 이소프탈산 그리고 벤조산 성분은 120분 이내에 모두 99% 이상 제거되었다. 또한 $UV/H_2O_2$, $O_3/H_2O_2$, $UV/H_2O_2/O_3$ 공정에서의 최적 $H_2O_2$ 주입농도는 각각 0.5M, 25 mM 그리고 5 mM로 나타나, UV와 $H_2O_2$를 오존산화 공정에 조합함으로써 유기물 제거율 향상과 함께 사용된 $H_2O_2$의 저감효과를 동시에 얻을 수 있었다.

Keywords

Acknowledgement

Supported by : 산업자원부

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