人工湿地对沙湖水的净化实验研究

Experimental Study on Purification of Shahu LakeWater by Constructed Wetland

分别采用砾石、沸石和火山岩作为基质,模拟构建垂直潜流型人工湿地对沙湖水进行处理实验,统一采用富贵竹作为人工湿地植株,水培种植不覆土。实验结果表明:三种填料湿地对COD去除率分别为:火山岩基质人工湿地(51.70%)>沸石基质人工湿地(48.42%)>砾石基质人工湿地(42.48%);对NH3-N去除率分别为:沸石基质人工湿地(86.51%)>火山岩基质人工湿地(73.02%)>砾石基质人工湿地(58.22%);对TP的去除率分别为:火山岩基质人工湿地(47.06%)>沸石基质人工湿地(27.78%)>砾石基质人工湿地(17.65%)。基于以上结果,认为火山基质填充湿地对沙湖水的处理效果最好。

Gravel,zeolite and volcanic rock were used as substrates to simulate and construct vertical subsurface flow constructed wetland to treat the water of ShahuLake.Fugui bamboo was used as constructed wetland plant,and hydroponic planting was not covered with soil.The results showed that the removal rates of COD by volcanic matrix constructed wetland,zeolite matrix constructed wetlandand gravel matrix constructed wetland were 51.70%,48.42%and 42.48%,respectively,and NH3-N removal rates were 86.51%,73.02%and 58.22%,respectively,and TP removal rates were 47.06%,27.78%and 17.65%,respectively.Based on the above rates,the wetland packed with volcanic matrix has the best treatment efficiency for ShahuLake water.