Treatment Efficiency of Pollutants in Constructed Wetlands under Different Hydroponic Wastewater Injection Methods and Characteristic of Filter Media
2010
Seo, D.C., Louisiana State University, Baton Rouge, LA, USA | Park, J.H., Gyeongsang National University, Jinju, Republic of Korea | Cheon, Y.S., Gyeongsang National University, Jinju, Republic of Korea | Park, S.K., Gyeongsang National University, Jinju, Republic of Korea | Kim, A.R., Gyeongsang National University, Jinju, Republic of Korea | Lee, W.G., GyeongSangnamdo Provincial Government Building, Changwon. Republic of Korea | Lee, S.W., Jinju National University, Jinju, Republic of Korea | Lee, S.T., Gyeongsangnam-do Agricultural Research and Extension Services, Jinju, Republic of Korea | Cho, J.S., Sunchon National University, Sunchon, Republic of Korea | Heo, J.S., Gyeongsang National University, Jinju, Republic of Korea
In order to improve T-N and T-P removal in HF (horizontal flow)-HF hybrid constructed wetlands by natural purification method for treating the hydroponic wastewater in greenhouses, the efficiency of water treatment as affected by the injection method of hydroponic wastewater, the addition of special filter media, the particle size of filter media, and the injection ratio of hydroponic wastewater in 1∨st HF and 2∨nd HF beds were investigated in small-scale HF-HF hydroponic wastewater treatment apparatus. Removal rate of T-P in the water in HF-HF hydroponic wastewater treatment apparatus with calcite as affected by addition method of special filter media was higher than that in HF-HF hydroponic wastewater treatment apparatus with other filter media. Removal rate of BOD, COD, SS, T-N and T-P in the water in mixed filter media with calcite were 86, 84, 87, 50 and 97%, respectively. Removals of pollutants except for T-P in the water were slightly different. Therefore, it should be considered that the removal rate of T-P was good for calcite in HF-HF hydroponic wastewater treatment apparatus. To improve T-N and T-P removal, the optimum particle size of filter media was 1.2 mm, and the optimum injection ratio (1∨st HF bed : 2∨nd HF bed) of hydroponic wastewater was 60:40.
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