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http://dx.doi.org/10.11614/KSL.2014.47.1.013

Evaluation of Removal Efficiency of Pollutants in Constructed Wetlands for Treating Greenhouse Wastewater Under Different Filter Media, Configuration Methods and Agricultural Water Loading  

Lee, Dong-Jin (National Institute of Environmental Research)
Park, Jong-Hwan (Divison of Applied Life Science & Institute of Agriculture and Life Science, Gyeong Sang National University)
Kim, Seong-Heon (Divison of Applied Life Science & Institute of Agriculture and Life Science, Gyeong Sang National University)
Yoon, Chan-Woong (Divison of Applied Life Science & Institute of Agriculture and Life Science, Gyeong Sang National University)
Cho, Ju-Sik (Department of Bio-Environmental Sciences, Sunchon National University)
Lee, Seong-Tae (Gyeongnam Agricultural Research and Extension Services)
Heo, Jong-Soo (Divison of Applied Life Science & Institute of Agriculture and Life Science, Gyeong Sang National University)
Seo, Dong-Cheol (Department of Bio-Environmental Sciences, Sunchon National University)
Publication Information
Abstract
To obtain optimum filter media, configuration method and greenhouse wastewater loading in small-scale constructed wetlands (CWs) for treating greenhouse wastewater, the apparatuses were constructed with 4 kinds of combined systems such as vertical flow (VH)-Horizontal flow (HF), HF-VH, HF-VF-HF, VF-HF-HF CWs. The efficiencies of pollutants in greenhouse wastewater were investigated in various CWs under different filter media, configuration methods and agricultural water loading. Removal rates of pollutants under different filter media were in the other of coarse sand>broken stone${\fallingdotseq}$calcite${\fallingdotseq}$mixed filter media for COD, broken stone>mixed filter media>coarse sand>calcite for T-N, and calcite>mixed filter media>broken stone>coarse sand for T-P. The removal rates of pollutants in HF-VH-HF CWs at different configuration methods were higher than those in other configuration methods. The removal rates of pollutants were higher in the order of $150L\;m^{-2}day^{-1}{\fallingdotseq}300L\;m^{-2}day^{-1}$ > $600L\;m^{-2}day^{-1}$ under different greenhouse wastewater loading. Therefore, optimum configuration method was HF-VH-HF CWs, the optimum filter media was mixed filter media (coarse sand : broken stone : calcite=1 : 1 : 1), and the optimum greenhouse wastewater loading was $300L\;m^{-2}day^{-1}$ in HF-VH-HF CWs.
Keywords
constructed wetland; greenhouse; horizontal flow; vertical flow; greenhouse wastewater;
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Times Cited By KSCI : 3  (Citation Analysis)
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