This study investigated the treatment of train station sewage by subsurface-flow constructed wetland. The sewage was from a comprehensive work area of Shijiazhuang-Taiyuan Passenger-dedicated Line, which has climate characteristics of high evaporation, low rainfall precipitation, cold winter, and large temperature difference in day and nights. The water quality of inflow and outflow, water temperature, and flow rates of outflow were monitored. Rules for pollutant removal in different seasons, removal mechanisms of different pollutants, and the limitations of single wetland on the sewage treatment with higher concentration were analyzed. It was found that subsurface-flow constructed wetland was a low-energy consuming technology. However, in ap7plication in the north area of China, the technology should be adapted for the local climate, and the supporting projects should be completed; enhancing the pretreatment, guaranteeing the plant harvest in autumn, and paying attention to heat preservation in winter.%项目选择在石太铁路客运专线某综合工区,工程地点具有高蒸发、少降雨、冬季寒冷、昼夜温差较大的特点.通过对进出水水质、水温和出水流量的监测,掌握污染物去除随季节变化的规律,不同污染物的去除机理,以及单级湿地对处理较高浓度污水的局限性.分析认为人工湿地作为一种低能耗、纯天然的污水工艺,在北方地区的推广,应结合当地的气候条件,完善必要的配套措施:强化预处理,注意秋季植物收割,冬季保温防寒等.
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