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2010•International Journal of Environment and PollutionRequires access

Impact of plant harvesting on nitrogen and phosphorus removal in constructed wetlands treating agricultural region wastewater

Shaoyong Lu, P.Y. Zhang, Weihua Cui

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Abstract

Agricultural region wastewater near Dianchi Lake, China increases eutrophication of the lake. Thus nitrogen and phosphorus removal from the wastewater by Phragmites australis and Zizania caduciflora in two Constructed Wetlands (CWs) was studied. South CW and North CW have areas of 2800 and 4200 m², respectively. From January 2003 to December 2003, the input loads were 5.31 (2.89) and 0.68 (0.37) kg P ha−1 day−1 in SCW (NCW). The removal amounts of N and P via plant harvesting accounted for 32 (58) and 37 (51)% of the corresponding removal load in SCW (NCW).

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What this paper is about

Agricultural region wastewater near Dianchi Lake, China increases eutrophication of the lake. Thus nitrogen and phosphorus removal from the wastewater by Phragmites australis and Zizania caduciflora in two Constructed Wetlands (CWs) was studied. South CW and North CW have areas of 2800 and 4200 m², respectively. From January 2003 to December 2003, the input loads were 5.31 (2.89) and 0.68 (0.37) kg P ha−1 day−1 in SCW (NCW). The removal amounts of N and P via plant harvesting accounted for 32 (58) and 37 (51)% of the corresponding removal load in SCW (NCW).

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Available abstract

Agricultural region wastewater near Dianchi Lake, China increases eutrophication of the lake. Thus nitrogen and phosphorus removal from the wastewater by Phragmites australis and Zizania caduciflora in two Constructed Wetlands (CWs) was studied. South CW and North CW have areas of 2800 and 4200 m², respectively. From January 2003 to December 2003, the input loads were 5.31 (2.89) and 0.68 (0.37) kg P ha−1 day−1 in SCW (NCW). The removal amounts of N and P via plant harvesting accounted for 32 (58) and 37 (51)% of the corresponding removal load in SCW (NCW).

Key concepts: Phragmites, Eutrophication, Wetland, Wastewater, Phosphorus, Environmental science, Nitrogen, Environmental engineering

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