한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제47권12호
  • /
  • Pages.1135-1143
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  • 2014
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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저수지 유입하천 현장적용실험을 통한 수질정화효율 평가

Evaluation of Pollutant Removal Efficiency through Field Test-Bed Experiment in the Rural Small Stream

  • 최선화 (한국농어촌공사 농어촌연구원) ;
  • 오종민 (경희대학교 환경학 및 환경공학과) ;
  • 김태훈 (경희대학교 환경응용과학과)
  • Choi, Sun Hwa (Rural Research Institute, Korea Rural Community Corporation) ;
  • Oh, Jong Min (Department of Environmental Science and Engineering, Kyung Hee University) ;
  • Kim, Tae-Hoon (Department of Environmental Application Science, Kyung Hee University)
  • 투고 : 2014.09.23
  • 심사 : 2014.10.31
  • 발행 : 2014.12.31
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초록

본 연구에서는 사상성 조류로 구성된 수질정화시설의 수질정화효율을 평가하고자 충남 서산시 음암면에 소재한 성암저수지 유입하천 홍수부지에 test-bed를 설치하고 유입하천수를 대상으로 현장적용실험을 실시하였다. 수질항목별로 정화효율을 평가한 결과, SS 80.9%, COD 74.6%, T-N 76.8%, T-P 84.4%, DTN 93.8%, DTP 98.3%의 제거효율을 보였다. 수온에 따른 정화효율은 수온이 약 $20^{\circ}C$로 유지되어 수질정화효율에 미치는 영향은 없는 것으로 나타났다. 수리학적 체류시간(HRT)은 SS 및 TP 처리효율과 유의한 상관성이 있는 것으로 나타났고, 체류시간을 5일로 했을 때 SS, TP 처리효율이 좋은 것으로 나타났다. 유입수의 COD/TN에 따른 처리효율은 TN, TP 모두 C/N비가 낮을수록 증가하였고, 유입수의 COD/TP에 따른 처리효율도 C/P비가 낮을수록 TN, TP 모두 처리효율이 증가하는 것으로 나타났다.

This study was carry out to evaluate of water purification in oxidation pond with filamentous algae mat. It is the water treatment process in the small rural streams to remove the organic materials and nutrients. We used the filamentous algae mat (FAM) which selectively predominate the filamentous algae to prevent the additional contamination by algae outflow, and we conducted a experiment on the water treatment process using the aquatic plants such as Eichhornia crassipes. The removal efficiencies (%) of water quality parameters were SS 80.9%, COD 74.6%, TN 76.8%, TP 84.4%, DTN 93.8% and DTP 98.3%, respectively. Temperature, a effect factor, was $21.8{\pm}5.9^{\circ}C$ during the operating period, according to temperature had no effect on the removal efficiencies of pollutants. Hydraulic retention time (HRT) strongly correlated with removal efficiencies (%) of SS and TP having r=0.414 (p<0.005), r=0.446 (p<0.005), respectively, and when HRT was 5day had highly removal efficiency (%) in SS and TP. TN and TP removal efficiency increased with ratio decreasing in both COD/TN and COD/TP of Influent.

키워드

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