Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Performance Evaluation of Tertiary Post-denitrification Processes for the Reuse of Secondary Effluent from Wastewater Treatment Plant

하수2차처리수의 재이용을 위한 후탈질공정의 평가

  • Lee, Chanho (Department of Environmental Engineering, Korea University) ;
  • Yun, Zuwhan (Department of Environmental Engineering, Korea University) ;
  • Yi, Yun Seok (Department of Environmental Engineering, Korea University) ;
  • Lee, Han Saem (Department of Environmental Engineering, Korea University) ;
  • Ahn, Dong Keun (POSCO Engineering & Construction CO., LTD)
  • 이찬호 (고려대학교 대학원 환경공학과) ;
  • 윤주환 (고려대학교 대학원 환경공학과) ;
  • 이윤석 (고려대학교 대학원 환경공학과) ;
  • 이한샘 (고려대학교 대학원 환경공학과) ;
  • 안동근 ((주)포스코건설)
  • Received : 2007.07.30
  • Accepted : 2007.09.07
  • Published : 2007.09.30
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Abstract

The effectiveness of add-on tertiary treatment processes for the polishing of the effluent of a biological nutrient removal (BNR) system from a modified $A^2/O$ process has been examined under the field condition with pilot-scale plants. The add-on treatment processes of 1) combined biofilm anoxic reactor and sand filtration, and 2) two-stage denitrification filter had been operated with various operating conditions. The experimental results indicated that two-stage denitrification filter could produced a better polished tertiary effluent. Filtration rate of $150m^3/m^2{\cdot}d$ for the 2-stage denitrifying filter could decrease the nitrate removal probably due to shorter detention time that caused insufficient reaction for denitrification. Two stage denitrification filter operated with M/N ratio of 3.0 and filtration rate of $100m^3/m^2{\cdot}d$ produced the tertiary effluent with nitrate and SS concentraitons of 2.8 mg/L and 2.3 mg/L, respectively. When the operating temperature reduced $30^{\circ}C$ to $18^{\circ}C$, $NO_3{^-}-N$ removal efficiency decreased from 73% to 68%.

Keywords

Acknowledgement

Grant : Integrated advanced treatment system을 위한 BNR 고효율화 탄소원 최적화 기술개발(2006)

Supported by : 환경부

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