Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effective Coagulation and Fenton Reagent Oxidation of Effluent from Biological Landfill Leachate Treatment

생물학적 처리 침출수의 응집 및 펜톤산화 처리

  • Won, Jong-Choul (The Metropolitan Area Landfill Department, Environmental Management Corporation) ;
  • Namkoong, Wan (Department of Environmental Engineering, Kunkuk University) ;
  • Park, Ki-Hyuk (The Metropolitan Area Landfill Department, Environmental Management Corporation) ;
  • Cho, Joon-Ho (The Metropolitan Area Landfill Department, Environmental Management Corporation) ;
  • Yoon, Cho-Hee (Division of Fine Chemistry and Chemical Engineering, Kyungnam University)
  • 원종철 (환경관리공단 수도권사업본부) ;
  • 남궁완 (건국대학교 환경공학과) ;
  • 박기혁 (환경관리공단 수도권사업본부) ;
  • 조준호 (환경관리공단 수도권사업본부) ;
  • 윤조희 (경남대학교 정밀화학공학부)
  • Received : 1999.08.23
  • Accepted : 2000.02.18
  • Published : 2000.05.31
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Abstract

The objectives of this study are to determine optimal operation condition of chemical coagulation with ferric chloride($FeCl_3$) and fenton reagent oxidation for effluents of a biological denitrification treatment and an existing lagoon treatment of landfill leachate, and to investigate the effect of alkalinity on fenton oxidation. In jar-tester, optimum dosage of ferric chloride for removal of COD was $1,500mgFe^{3+}/L$, removal efficiencies of $COD_{Cr}$ and $COD_{Mn}$ under this condition were about 55% and 64%, respectively. After chemical precipitation($1,500mgFe^{3+}/L$) of biological treatment effluent, optimum $Fe^{2+}/H_2O_2$ ratio of fenton oxidation was 1.5, the maximum removal efficiency of COD was about 80%, and optimum dosages of ferrous sulfate and hydrogen peroxide were $600mgFe^{2+}/L$ and $400mgH_2O_2/L$, respectively. The removal efficiency of COD was decreased as alkalinity was increased.

본 연구에서는 생물학적으로 질산화/탈질 처리한 침출수와 기존 라군 처리한 침출수를 대상으로 응집과 펜톤산화시 최적 처리조건을 탐색하고, 펜톤산화시 알카리도가 COD 처리효율에 미치는 영향을 조사하였다. Jar-Tester를 이용한 응집처리시 염화제이철($FeCl_3$)의 적정 투입농도는 약 $1500mgFe^{3+}/L$로 조사되었으며, 이때 $COD_{Cr}$은 약 55%, $COD_{Mn}$은 약 64%의 처리효율을 나타냈다. 응집처리후($1,500mgFe^{3+}/L$) 펜톤처리시 약품투입비는 $Fe^{2+}/H_2O_2$의 비 1.5에서 COD 처리효율은 약 80%로 최대 처리효율을 나타냈으며, 이때 최적 약품투입농도는 철염 $600mgFe^{2+}/L$, 과산화수소수 $400mgH_2O_2/L$이었다. 펜톤 산화시 유입수의 알카리도가 증가됨에 따라 COD 처리효율이 저하되었다.

Keywords