Journal of Engineering Research

There are significant seasonal differences in the ecological purification efficiency of tail water wetlands in municipal wastewater treatment plants, which affect their long-term stable operation and environmental benefits. This paper takes a typical constructed wetland system as the research object, and combines water quality monitoring data in different seasons to analyze the variation trends of pollutant removal rates (such as nitrogen and phosphorus) and their influencing factors. Temperature, plant growth cycles, and microbial activity are the main causes of seasonal variations in purification efficiency. Low temperatures in winter inhibit biological metabolism, leading to a decline in removal efficiency; while plant absorption and microbial activity are enhanced in spring and summer, resulting in the best purification effect. The research results can provide a scientific basis for wetland design optimization and operation management, and improve the ecological sustainability of tail water treatment.

Municipal wastewater; Tail water wetland; Ecological purification; Seasonal difference; Pollutant removal