Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Characteristics of sewage Treatment by using Indirectly Aerated Submerged Biofilter(INSUB)

간접폭기형 침적생물여과장치(INSUB)를 이용한 오수처리 특성

  • Huh, Mock (Dept. of Environmental Engineering, Cheju National University) ;
  • Kang, Jin-Yuong (Dept. of Environmental Engineering, Cheju National University) ;
  • Kim, Gwang-Jin (Dept. of Environmental Engineering, Cheju National University)
  • 허목 (제주대학교 환경공학과) ;
  • 강진영 (제주대학교 환경공학과) ;
  • 김광진 (제주대학교 환경공학과)
  • Received : 2003.06.10
  • Accepted : 2003.06.20
  • Published : 2003.06.30
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Abstract

This study was carried out to develop INSUB(Indirected Aerated Submerged Biofilter) which can remove organics, nitrogen and phosphorus with an advanced treatment system. The results were as followed in laboratory model experiment. As for treatment of sewage, when economical efficiency was considered in practice, the highest removal efficiency was at 18hr of HRT, 1.017m/hr of superficial velocity and 40% of media packing ratio. Each removal efficiency for $COD_{cr}$, $COD_{Mn}$, $BOD_5$, T-N, and T-P was 90.6, 85.3, 95.0, 52.3 and 56.8%. To remove the nitrogen and phosphorus With high efficiency, first of all, denitrification have to be completed, then uptake of phosphorus have to completed. Therefor, mixture of anoxic and aerobic reactor was necessary for the high removal efficiency of nitrogen and phosphorus in INSUB.

본 연구는 오수중의 유기물 및 질소 인의 동시제거를 위한 오 폐수 고도처리장치인 간접폭기형 침적생물막여과장치(Indirected Aerated Submerged Biofilter : INSUB)를 개발하기 위하여 실험실적 모형실험을 수행하였다. INSUB에서 오수를 처리함에 있어서, HRT 18시간, 공탑속도 42.5m/hr, 충전율 40%인 경우가 실제로 경제적인 효율을 고려하였을 때, 가장 효율이 좋았다. 각각의 제거효율을 살펴보면, $COD_{cr}$, 90.6%, $COD_{Mn}$ 85.3%, $BOD_5$ 95.0%, T-N 52.3% 그리고 T-P 56.8%로 나타났다. 질소 인의 고효율처리를 위해서는 전탈질공정에 의한 산화질소의 제거를 위해 무산소, 호기조의 조합 등에 의한 system의 일부 다단화가 필요함을 확인할 수 있었다.

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