Mechanism and Influencing Factors of Nitrogen Removal in Subsurface Flow Constructed Wetland

Wenwu Shi, Huan Li, Anying Li


The mechanism of nitrogen removal and the transformation of nitrogen compounds were reviewed. A new way to increase nitrogen removal rate was pointed out. Based on the study of temperature, pH, dissolved organic carbon, dissolved oxygen and other factors, as well as hydraulic retention time, nitrogen load, reflux, water and other configuration patterns outlined, environmental factors and operating conditions for the subsurface effect of nitrogen removal on constructed wetland were explored.

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