水平潜流人工湿地处理太原市城市再生水的运行效能

以山西省太原市某污水厂的高氮低碳尾水为研究对象，开展基于3床并联的水平潜流人工湿地处理尾水的中试研究。研究结果表明，该人工湿地系统启动2个月进入稳定运行期；稳定运行期3个床体的出水水质除TN外其余指标均满足《地表水环境质量标准》（GB3838—2002）中Ⅳ类水体标准，TN指标满足《城镇污水处理厂污染物排放标准》（GB18918．2002）中一级A标准，该湿地系统出水可直接用于补充景观用水；稳定运行期3床的植物与基质的配置更适合处理同类尾水，3个床体对各污染物的去除效果均为3床〉2床〉1床；本系统中填料对污染物处理效果的影响大于植物对污染物处理效果的影响，最优填料顺序依次为沸石、砾石和钢渣，最适植物栽种顺序为芦苇、香蒲、美人蕉、黄菖蒲和芦苇。

Performance of horizontal subsurface flow constructed wetlands for treatment of municipal reclaimed wastewater in Taiyuan

The horizontal subsurface flow constructed wetlands （SFCW） were built for advanced treatment of the tailwater with high-nitrogen low-carbon from a municipal sewage treatment plant in Taiyuan. The results showed that it spent two months from the start period to the stable operation period. In the stable operation peri- od, the effluent of the wetland system achieved the IV level of GB 3838-2002, excepted TN. And TN achieved the 1A level standard of GB 18918-2002. Wetland system effluent can be reused for the waterscape. Every pollu- tant removal efficiency of constructed wetland system was bed 3 〉 bed 2 〉 bed 1. In this system, the impact of the filler was greater than that of the plants on the treatment of pollutants. The optimal packing order was the zeo- lite, the gravel and the slag. And the optimal plant planting order was reed, cattail, canna, yellow iris and reeds.