复合式人工湿地浮桥技术处理系统实验研究

STUDY ON A HYBRID CONSTRUCTED WETLAND WITH FLOATING BRIDGE TECHNOLOGY TREATMENT SYSTEM

对传统人工湿地进行改进,通过引进浮桥技术,在同一湿地单元实现浮游植物搭配沉水植物,并与传统水平潜流式湿地相结合,设计出一套新型复合式人工湿地处理系统,研究该系统对生活污水COD、NH3-N、TN、TP的净化效果,并对各指标去除率进行Pearson相关性分析。30d的实验研究结果表明,系统对生活污水的COD、NH3-N、TN、TP的平均去除率分别为79.6%、64.0%、54.4%、74.6%;二级浮桥平流式湿地单元对COD的去除效果较差,但对NH3-N、TN和TP去除效果突出;各指标间去除率在每级湿地单元中表现出不同的相关性。

In this study we placed phytoplankton and submerged plant in one wetland unit by using the floating bridge technology innovatively, designed a new compound artificial wetland treatment system by the combination with traditional horizontal undercurrent wetland, and researched the purification efficiency of COD, NH3-N, TN, TP for domestic sewage in the system. After one month the results showed that the average removal rates of COD, NH3-N, TN, TP were 79.6%, 64.0%, 54.4%, 74.6% respectively. The removal efficiency of COD in the secondary pontoon bridge flat flow wetland unit was not so satisfying, while the removal rates ofNH3-N, TN and TP were particularly prominent. The removal rates of each item showed different relevance in different wetland units.