期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：267
期号：6
页码：1-7
DOI：10.1088/1755-1315/267/6/062038
出版社：IOP Publishing
摘要：Constructed wetlands have been successfully applied to the removal of various pollutants in recent decades. The treatment effect of constructed wetlands on domestic sewage is affected by the type of wetland, plant species, temperature, pollutant concentration and environmental factors. The seasonal variation of the removal rate of domestic sewage and the removal rate of main pollutants (TN, TP, COD, NH4+-N) were studied under the mixed conditions of four plants, and the degradation effect of pollutants along the course was explored. Clarifying the comprehensive purification ability of various wetland plants on domestic sewage and defining the effect of temperature on removal rate. The results showed that temperature had a great influence on the removal efficiency, which was significantly higher in summer than in winter. Temperature had the greatest effect on TP removal, ranging from 88.1% to 42.4%, and COD was the lowest, ranging from 57.11% to 44.47%. The degradation rate increased gradually along the path in summer and winter, and the closer to the intake, the more obvious the degradation effect was, and the degradation rate was much higher in summer than in winter. Compared with other pollutants, TP had a higher removal effect in the middle and tail positions of the wetland.
