Purification Efficiency under the Combined Function of 4 Plants on Domestic Sewage

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Tu, Yue^1^2 ; Li, Haixiang^1^2 ; Dong, Kun^1^2 ; Li, Qin^1^2 ; Jiang, Lei^1^2

School of Environmental Science and Engineering, Guilin University of Technology, Guilin, GUANGXI

541006, China^1

Guangxi Mining and Environmental Science Experimental Center, Guilin, GUANGXI

541006, China^2

关键词: Constructed wetlands;    Degradation effect;    Effect of temperature;    Environmental factors;    Pollutant concentration;    Purification ability;    Purification efficiency;    Removal efficiencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/6/062038/pdf
DOI  :  10.1088/1755-1315/267/6/062038

学科分类：环境科学（综合）

来源: IOP

【 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.