人工湿地去除天然水体NOM现场试验研究

Field Study on the Removal of NOM in Natural Water Body Using Constructed Wetland

以4种不同基质建设4组垂直复合流人工湿地,开展人工湿地去除天然水体NOM的现场连续试验。结果表明,各组人工湿地对天然水体的NOM均表现出一定的去除能力,以煤渣为基质的人工湿地的去除效果最好,但是考虑到潜在的风险,不宜用于以供水为目的的水质净化工程。受有机物降解机制影响,各组人工湿地对不同指标的去除效果均表现出一定的差异。系统运行稳定性评估结果显示,以煤渣为基质的人工湿地的稳定性最好。

This work investigated the removal of NOM in natural water body using constructed wetlands at a pilot-scale field experiment in continuous-flow mode. Results indicate that the constructed wetlands with different substrates were effective to remove the NOM in the experimental water. Cinder-constructed wetland was most efficient for removing NOM. For the potential health risk, cinder is not suitable for the use in water supply project. Subjected to the degradation mechanism of organic matter, the removal rates of different indicator were different to some degree. Results of stability estimation indicted that the one of cinder-constructed wetland was best.