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High-efficiency wetland systems combining various types of wetland and a porous microbial media have been studied. The adsorption characteristics of ceramic media was investigated through the adsorption isotherms. As a result of water analysis, treatment efficiency based on the CODcr were approximately 60%, and the effluent CODcr is 10.75 mg/L. The nitrogen uptake rate of Eichhornia crassipes were the 47.11 mg/day·ea that was highest among five kinds of aquatic plants like Eichhornia crassipes, Typha orientalis, Leersia japonica, Iris pseudoacorus, and Phragmites japonica steud.
The Phosphorus uptake rate of Eichhornia crassipes, Typha orientalis, Leersia japonica, Iris pseudoacorus, and Phragmites japonica steud were 0.57 mg/day·ea, 0.2 mg/day·ea, 0.16 mg/day·ea, 0.17 mg/day·ea, and 0.92 mg/day· ea respectively. The main mechanisms removing contaminants from total reactors are phytoremediation and sedimentation.
As a result, CODcr and BOD5 of average effluent concentration is 17.49 mg/L and 2.09 mg/L respectively. This contactconstructed wetland systems were applied to the demonstration plant, and the water quality of that system were satisfactory by inoculation of soil microorganisms and increasing amount of aquatic plants.