Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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A Proposition for the Removal of Algae and Phosphorus from River Water Using Multi-Purpose filtration pond

다목적 여과저류지를 이용한 하천수의 조류와 인 제거방안 제안

  • Choi, Hong-Gyu (Water Resources Engineering Corporation) ;
  • Jeong, Il-Hwa (Department of Environmental Engineering, Yeungnam University) ;
  • Bae, Gha-Ram (Department of Environmental Engineering, Yeungnam University) ;
  • Park, Jae-Young (Business Research & Planning Dept., K-Water) ;
  • Lee, Jong-Jin (Business Research & Planning Dept., K-Water) ;
  • Kim, Yong-Woon (Business Research & Planning Dept., K-Water) ;
  • Jung, Kwan-Sue (Department of Civil Engineering, Chungnam National University) ;
  • Kim, Seung-Hyun (Department of Environmental Engineering, Yeungnam University)
  • Received : 2013.06.06
  • Accepted : 2013.07.08
  • Published : 2013.07.30
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Abstract

In an effort to find a solution to the eutrophication of major Korean rivers, a method to utilize multi-purpose filtration pond was investigated. As literature showed that oyster shell is known to be the most adequate for the removal of dissolved phosphorus in Korean rivers, batch and column experiments were performed using oyster shell as an adsorbent in this study. The results of the batch experiment showed that the removal of dissolved phosphorus from river water through adsorption as a way of preventing algal growth was not practical. The results obtained from the column experiment, however, suggested that oyster shell may be utilized as an adsorbent under limited conditions. Based on the results of the experiments a methodology was proposed to remove algae from river water through the use of multi-purpose filtration pond. This method involves mechanically removing the accumulated algae cake from the surface of the artificial stream in the pond towards the condensing part located at the lower reach of the stream, where particles gather before the final removal. In addition, employment of oyster shell as an adsorbent in the condensing part allows prevention of phosphorus released from the dead algae re-entering the river water.

대하천의 조류문제에 대한 해결책을 찾기 위해 다목적 여과저류지를 활용하는 방안을 연구하였다. 문헌조사를 통해 용존 인의 흡착제거에 우리나라에서는 굴패각이 적합함을 알 수 있었고, 이를 흡착제로 활용한 등온흡착실험과 칼럼실험을 수행하였다. 등온흡착실험결과 흡착에 의해 하천수의 용존 인을 모두 제거하여 대하천에서의 조류발생을 방지하는 것은 어렵다는 것을 알 수 있었고, 칼럼실험결과 제한적인 조건에서는 굴패각을 흡착여재로 활용하는 방안이 가능함을 알 수 있었다. 실험결과를 근거로 이미 발생한 조류를 여과저류지를 이용하여 제거하는 방안을 제시하였으며, 인공하천의 하상표층에 형성된 슬러지 케익을 기계적으로 제거하여 하류의 농축부에 모아 최종제거하고 또한 농축부에서 흡착재로 굴패각을 사용함으로써 농축부의 사멸조류에 의한 인의 재방출을 억제하는 것이다.

Keywords

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