Performance of a pilot-scale constructed wetland for stormwater runoff and domestic sewage treatment on the banks of a polluted urban river.
To examine the performance of a constructed wetland system on stormwater runoff and domestic sewage (SRS) treatment in central east China, two parallel pilot-scale integrated constructed wetland (ICW) systems were operated for one year. Each ICW consisted of a down-flow bed, an up-flow bed and a horizontal subsurface flow bed. The average removal rates of chemical oxygen demand (CODCr), total suspended solids (TSS), ammonia (NH4(+)-N), total nitrogen (TN) and total phosphorus (TP) were 63.6, 91.9, 38.7, 43.0 and 70.0%, respectively, and the corresponding amounts of pollutant retention were approximately 368.3, 284.9, 23.2, 44.6 and 5.9 g m(-2) yr(-1), respectively. High hydraulic loading rate (HLR) of 200 mm/d and low water temperatures (<15 °C) resulted in significant decrease in removals for TP and NH4(+)-N, but had no significant effects on removals of COD and TSS. These results indicated that the operation of this ICW at higher HLR (200 mm/d) might be effective and feasible for TSS and COD removal, but for acceptable removal efficiencies of nitrogen and phosphorus it should be operated at lower HLR (100 mm/d). This kind of ICW could be employed as an effective technique for SRS treatment.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail: wuzb@ihb.ac.cn; University of Chinese Academy of Sciences, Beijing 100049, China.
Weijie
W
Guo
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail: wuzb@ihb.ac.cn; University of Chinese Academy of Sciences, Beijing 100049, China.
Zhu
Z
Li
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
Shuiping
S
Cheng
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail: wuzb@ihb.ac.cn.
Wei
W
Liang
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail: wuzb@ihb.ac.cn.
Feng
F
He
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail: wuzb@ihb.ac.cn.
Zhenbin
Z
Wu
D002681:China; D002947:Cities; D009584:Nitrogen / Q000302:isolation & purification; D010865:Pilot Projects; D045483:Rivers; D012722:Sewage / Q000032:analysis; D018505:Waste Management; D014876:Water Pollution / Q000517:prevention & control; D053833:Wetlands
D012722:Sewage; D009584:Nitrogen