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http://dx.doi.org/10.5389/KSAE.2011.53.6.121

Variation of Water Treatment Efficiency during Long-term Operation of Constructed Wetland  

Son, Yeong-Kwon (건국대학교 환경과학과)
Yoon, Chun-Gyeong (건국대학교 환경과학과)
Kim, Hyung-Joong (한국농어촌공사 농어촌연구원)
Haam, Jong-Hwa (한국농어촌공사 농어촌연구원)
Publication Information
Journal of The Korean Society of Agricultural Engineers / v.53, no.6, 2011 , pp. 121-128 More about this Journal
Abstract
Long-term water treatment performance analysis was conducted for the constructed wetland treating agricultural tailwater. Studied wetland was established in 2001 and operated from June, 2002 to November, 2010. Wetland vegetation cover was shown over 90 % coverage after 2005. According to vegetation development, accumulation of sediment nutrient was observed; Organic Carbon, T-P and T-N. In addition, DO concentration and temperature was decreased in the constructed wetland output. An infiltration rate also significantly decreased due to compaction of wetland soil. A runoff coefficient was increased due to the low infiltration rate after 2005. A T-N, TSS and Chl.a removal rate was maintained constantly. However, the T-P removal rate was slightly decreased along to wetland operation because low DO concentration could increase elution of phosphorus from sediment. After constructing open water, the T-P removal rate was increased. This is because open water could accelerate the reaearation process. Consequently, over three years of vegetation development could be helpful for wetland performance. In addition, DO concentration is important factor to maintain the T-P treatment.
Keywords
Constructed wetland; Long-term analysis; Vegetation; Removal rate; non-point source pollution;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
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