Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Nitrogen and Phosphorus Removal Efficiency of Aluminum Usage in DEPHANOX Process

DEPHANOX 공정 내 알루미늄 첨가에 따른 질소 및 인 제거 효율 평가

  • Lee, Beom (SunJin Engineering ＆ Architecture) ;
  • Park, Noh-Back (Department of Climate charge & Agroecology Division, National Academy of Agricultural Science) ;
  • Tian, Dong-Jie (Department of Environmental Engineering, Chungbuk Natianal University) ;
  • Heo, Tae-Young (Department of Information Statistics, Chungbuk National University) ;
  • Jun, Hang-Bae (Department of Environmental Engineering, Chungbuk Natianal University)
  • 이범 ((주)선진엔지니어링) ;
  • 박노백 (국립농업과학원 기후변화생태과) ;
  • 전동걸 (충북대학교 환경공학과) ;
  • 허태영 (충북대학교 정보통계학과) ;
  • 전항배 (충북대학교 환경공학과)
  • Received : 2011.10.24
  • Accepted : 2012.05.29
  • Published : 2012.05.30
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Abstract

Removal of total nitrogen (T-N) and total phosphorus (T-P) was evaluated in a DEPHANOX process by adding Al(III) to the separator to maintain T-P in the final effluent below 0.2 mg/L. pH in each reactor was maintained 7~8 after addition of Al(III) to the levels of 5, 10, 15 mg/L. The removal efficiency of COD and T-N decreased at higher Al(III) dose, but T-P removal efficiency increased from 76.28 to 84.02, 94.66% at Al(III) dose of 5, 10, 15 mg/L, respectively. T-P in effluent showed 0.17 mg/L at Al(III) dose of 15 mg/L. Minimum 15 mg/L of Al(III) was required to maitain T-P below 0.2 mg/L in the final effluent.

본 연구는 DEPHANOX 공정내 분리조에 Al(III) ($Al_2(SO_4)_3{\cdot}17H_2O$)를 주입하여 유출수의 T-P 농도를 0.2 mg/L 이하로 유지하기 위한 주입량을 도출하고 Al(III) 첨가에 따른 질소 및 인 제거 효율을 평가하였다. 반응조 내에 Al(III)을 5, 10, 15 mg/L주입하여도 pH와 알칼리도 저감에 대한 영향은 나타나지 않았으며 반응조 내의 pH는 7~8 사이로 유지하였다. 응집제의 주입량이 증가할수록 유기물과 T-N 제거효율은 감소하였으나, T-P 제거효율은 주입량이 5, 10, 15 mg/L로 증가할수록 76.28, 84.02, 94.66% 증가하였다. Al(III)주입량 15 mg/L에서 유출수의 T-P 농도는 0.17 mg/L로 관찰되어 유출수의 T-P 농도를 0.2 mg/L 이하로 유지하기 위한 Al(III)의 주입량은 최소 15 mg/L 이상임을 확인하였다.

Keywords

Acknowledgement

Supported by : 충북대학교

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