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Optimum Configuration, Filter Media Depth and Wastewater Load of Small-scale Constructed Wetlands for Treating the Hydroponic Waste Solution in Greenhouses

시설하우스 폐양액 처리를 위한 소형 인공습지의 최적 조합방법, 여재깊이 및 폐양액 부하량

  • Park, Woo-Young (Division of Applied Life Science, Gyeongsang National University) ;
  • Seo, Dong-Cheol (Wetland Biogeochemistry Institute, Louisiana State University) ;
  • Lim, Jong-Sir (Division of Applied Life Science, Gyeongsang National University) ;
  • Park, Seong-Kyu (Division of Applied Life Science, Gyeongsang National University) ;
  • Cho, Ju-Sik (Division of Applied Life and Environmental Sciences, Sunchon National University) ;
  • Heo, Jong-Soo (Division of Applied Life Science, Gyeongsang National University) ;
  • Yoon, Hae-Suk (Department of Gyeongnamdo Agricultural Research and Extension Services)
  • 박우영 (경상대학교 응용생명과학부) ;
  • 서동철 (루이지애나주립대 습지생물지구화학연구소) ;
  • 임종서 (경상대학교 응용생명과학부) ;
  • 박성규 (경상대학교 응용생명과학부) ;
  • 조주식 (순천대학교 생명환경과학부) ;
  • 허종수 (경상대학교 응용생명과학부) ;
  • 윤혜숙 (경상남도 농업기술원)
  • Published : 2008.09.30

Abstract

To obtain optimum configuration, depth and load of constructed wetlands(CWs) for treating of hydroponic waste solution(HWS) which was produced in greenhouses, the study was conducted with 4 kinds of combined systems such as Vertical flow(VF)-Horizontal flow(HF), VF-VF, HF-VF and HF-HF CWs. In four configurations of CWs, the treatment efficiency of pollutants from HWS under depth of HF and VF beds, HWS loading and HWSs were investigated. Removal rate of pollutants under different depth of VF and HF in 2-stage hybrid CWs was in the order of 50 cm < 70 cm regardless of CWs configuration. Removal rate of pollutants under HWS loading in 2-stage hybrid CWs was in the order of $150L\;m^{-2}\;day^{-1}{\fallingdotseq}300L\;m^{-2}\;day^{-1}\;>\;450L\;m^{-2}\;day^{-1}$. The optimum depth and HWS loading were 70 cm and $300L\;m^{-2}\;day^{-1}$ in four configurations of CWs, respectively. Using this optimum condition, for various HWSs (cucumber, paprika and strawberry HWS), removal rate of pollutants in HF-HF CWs was higher than that in HF-VF CWs. Optimum configuration of 2-stage hybrid CWs for treating hydroponic waste solution in greenhouses was found out to be HF-HF CWs. Therefore, under the optimum conditions, removal rate of BOD, COD, SS, T-N and T-P in HF-HF CWs were 84, 81, 84, 51 and 93%, respectively.

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