人工湿地系统处理污染河水的填料选配

Study on Packing Medium Selection in Constructed Wetland System for Treating Polluted River Water

选择不同的建筑废弃物作为主填料构建了4套人工湿地的中试系统，进行了人工湿地的填料选配研究。结果表明，以等体积掺混废砖块和废陶获得的混合填料构建的人工湿地系统，在处理含高浓度和低浓度有机污染物的河水时均表现出良好的除污效果。其在进水COD和氨氮浓度分别为40～70mg／L和10～35mg／L的情况下，对COD和氨氮的平均去除率分别达40％和56％；在进水COD和氨氮浓度分别为15～30mg／L和0．3～3mg／L的情况下，COD和氨氮的平均去除率分别为25％和70％。建筑废弃物混合填料来源丰富、成本低廉，对于处理水质季节性变化很大的污染河水，人工湿地系统具有良好的适应性。

Four pilot constructed wetlands using different building waste as packing medium were set up to study the packing medium selection in constructed wetland system for treating polluted river water. The results show that pollutants removal performance of the system constructed by the mixed packing medium with equal volume proportion of bricks and ceram waste is the best of the four systems. When influent concentration of COD and ammonia nitrogen is 40 -70 mg/L and 10 - 35 mg/L respectively, the average COD and ammonia nitrogen removal efficiencies are 40% and 56% respectively. When influent concentration of COD and ammonia nitrogen is 15 - 30 mg/L and 0.3 - 3 mg/L respectively, the average COD and ammonia nitrogen removal efficiencies are 25% and 70% respectively. And with abundant source and low cost, the packing medium of mixed construction waste is well adaptive to the constructed wetland system for treating polluted river water with high seasonal change in water quality.