菖蒲人工湿地对城市生活污水的净化研究

Urban sewage treatment performance of calamus artificial wetlands filled with soil and/or coal ash

分别研究了土壤、粉煤灰和土壤及粉煤灰3种基质构建的菖蒲模拟人工湿地系统对城市生活污水的净化效果,并探讨了进水流量对城市生活污水净化效果的影响。结果表明,用粉煤灰基质构建的菖蒲模拟人工湿地系统的TP、TN、NH4+-N、浊度净化效果最佳,去除率最高,分别可达99.7%、85.8%、99.5%、99.3%;用粉煤灰和土壤基质构建的菖蒲模拟人工湿地系统的COD净化效果最佳,去除率最高,可达83.2%。因此,菖蒲人工湿地系统对城市生活污水的净化能力强,尤其适合广大中小城市生活污水的处理,具有极其广阔的应用与推广前景。

Lab scale calamus artificial wetland systems,using soil,pulverized coal ash and soil/coal ash(equal volume mixture of soil and pulverized coal ash) as the filling material,were compared in sewage treatment at varying hydraulic loading rates of 1,2,3 and 5 L/d.The results have demonstrated the outstanding treatment performance of all wetland systems especially at the low loading rates as well as the benefits of including coal ash.Overall,the coal ash system accomplished the most removals of TP,TN,NH+4-N and turbidity;the soil/coal ash system was best in removing COD.