2013•Hubei nongye kexueRequires access

Removal Effect of Subsurface Flow Wetland on Secondary Effluent from Sewage Treatment Plant

Xuwen He

Abstract

Horizontal limestone subsurface wetland was applied to advanced remove secondary effluent from sewage treatment plant.Hydraulic loading was intermittent contrdled and a continuous water samplings,namely,samplings under hydraulic loadings were of 0.278,0.139 and 0.093 m/d,were selected.The results showed that the horizontal limestone subsurface flow constructed wetlands had better removal effects on CODcr,NH3-N,TN and TP,and 0.093 m/d was the best run hydraulic load.Moreover,the removal effect of the subsurface flow wetland on each pollutant increased with the decreasing of the hydraulic load.

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Key concepts: Subsurface flow, Effluent, Wetland, Environmental science, Constructed wetland, Pollutant, Sewage, Sewage treatment