Open AccessPurification Efficiency under the Combined Function of 4 Plants on Domestic Sewage
Author(s) -
Yue Tu,
Haixiang Li,
Kun Dong,
Qin Li,
Lei Jiang
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/267/6/062038
Subject(s) - pollutant , sewage , wetland , environmental science , degradation (telecommunications) , sewage treatment , environmental engineering , constructed wetland , environmental chemistry , wastewater , chemistry , ecology , biology , telecommunications , computer science
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, NH 4 + -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.