Nutrient Removal from Polluted River Water by Combining Vertical and Horizontal Subsurface Flow Constructed Wetlands

Cheng Xin Qin; Gang He; Yu Huan Duan; Xiao Ping Pang; Zong Lian She

doi:10.4028/www.scientific.net/AMR.663.1029

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 663Nutrient Removal from Polluted River Water by...

Nutrient Removal from Polluted River Water by Combining Vertical and Horizontal Subsurface Flow Constructed Wetlands

Abstract:

A lab-scale hybrid constructed wetland system was constructed to purify polluted river water. The system was composed of a first stage of the vertical subsurface flow filter, followed by a second stage of horizontal subsurface flow bed. Both beds used furnace slag with a size of 4-60 mm for the main layer. The system was continuously fed. Different depths of unsaturated layer (0 cm, 15 cm and 30 cm) in vertical filter were tested. The unsaturated layer of 30 cm in vertical filter presented the most effective ammonia removal of 89.1%, while lowest NO3--N removal rate of 74.1% for the system. High TN removal efficiencies (77.3%-81.0%) could be observed during operation of three depths. The removals of COD and TP were in the range of 97.1%-98.4% and 76.4%-88.9%, respectively.

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Periodical:

Advanced Materials Research (Volume 663)

Pages:

1029-1032

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.663.1029

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Online since:

February 2013

Authors:

Cheng Xin Qin, Gang He, Yu Huan Duan, Xiao Ping Pang, Zong Lian She

Keywords:

Constructed Wetland, Hybrid System, Nutrient Removal, Polluted River Water, Slag

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