人工湿地在冬季低温地区的应用研究进展

Literature review of winter performance of the constructed wetlands located in low-temperate areas

人工湿地运行效果受季节、温度等因素影响较大,在冬季低温地区运行效率下降,特别是N、P污染物去除率偏低,限制了其在冬季低温地区的推广应用。结合目前国内外人工湿地在冬季低温地区的应用情况,分析了影响人工湿地低温运行的因素,并对提高人工湿地在冬季低温地区运行效率的各种强化措施进行了总结。

Since bacterial activities decrease with declining temperature, the constructed wetlands located in lowtemperate areas are far less effective in winter with much reduced ammonia and TN and TP removal rates. The paper presents the fundamentals of a typical constructed wetland, the treatment mechanism, the important factors affecting its performance and several approaches to enhance the winter treatment effectiveness by improving the wetland design, optimizing operation, incorporating pretreatment （such as settling, aeration） and pos-treatment （stabilization pond） steps to the constructed wetland wastewater treatment systems. More applications of the low cost constructed wetland processes in temperate areas of China are expected.