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2006•China Environmental ScienceRequires access

The purification effect of underflow type constructed wetland in the winter

Yan Lu

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Abstract

Through adopting heat preservation measures on wetland system in winter, the temperature in the wetland could be maintained and raised effectively, and the wetland purification efficiency could be improved; the pollutant removal rates of different plant wetlands were compared under different operation way. Through controlling the wetland operation way, the temperature of wetland system and the level of dissolved oxygen could be enhanced, thus enhancing the removal rate of COD, TN and TP. The removal rates of wetland outflow water could reach 72.5% and 58.2% respectively when the hydraulic retain time was 5d.

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What this paper is about

Through adopting heat preservation measures on wetland system in winter, the temperature in the wetland could be maintained and raised effectively, and the wetland purification efficiency could be improved; the pollutant removal rates of different plant wetlands were compared under different operation way. Through controlling the wetland operation way, the temperature of wetland system and the level of dissolved oxygen could be enhanced, thus enhancing the removal rate of COD, TN and TP. The removal rates of wetland outflow water could reach 72.5% and 58.2% respectively when the hydraulic retain time was 5d.

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Available abstract

Through adopting heat preservation measures on wetland system in winter, the temperature in the wetland could be maintained and raised effectively, and the wetland purification efficiency could be improved; the pollutant removal rates of different plant wetlands were compared under different operation way. Through controlling the wetland operation way, the temperature of wetland system and the level of dissolved oxygen could be enhanced, thus enhancing the removal rate of COD, TN and TP. The removal rates of wetland outflow water could reach 72.5% and 58.2% respectively when the hydraulic retain time was 5d.

Key concepts: Wetland, Environmental science, Constructed wetland, Arithmetic underflow, Environmental engineering, Pollutant, Outflow, Wastewater

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