State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China E-mail:
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
Water Sci Technol. 2014;69(7):1410-8. doi: 10.2166/wst.2014.027.
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.
为考察人工湿地系统对华东地区雨水和生活污水（SRS）处理的性能，我们运行了两个平行的中试规模集成人工湿地（ICW）系统一年。每个 ICW 由一个下流式床、一个上流式床和一个水平潜流床组成。CODCr、TSS、NH4(+)-N、TN 和 TP 的平均去除率分别为 63.6%、91.9%、38.7%、43.0%和 70.0%，相应的污染物去除量约为 368.3、284.9、23.2、44.6 和 5.9 g m(-2) yr(-1)。高水力负荷率（HLR）200 mm/d 和低温（<15°C）导致 TP 和 NH4(+)-N 的去除率显著下降，但对 COD 和 TSS 的去除率没有显著影响。这些结果表明，该 ICW 以较高的 HLR（200 mm/d）运行可能对 TSS 和 COD 的去除有效且可行，但为了获得可接受的氮磷去除效率，应在较低的 HLR（100 mm/d）下运行。这种 ICW 可以作为处理 SRS 的有效技术。
