期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 25, 期 9, 页码 8532-8541出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-017-1168-7
关键词
Domestic wastewater; Hybrid constructed wetland system; Vertical flow constructed wetland; Horizontal subsurface flow constructed wetland; Nitrogen
资金
- Fundamental Research Funds for the Central Universities [2012ZYTS033]
A hybrid constructed wetland (CW) system was operated at pilot scale to evaluate the treatment of domestic wastewater from university dorms in Hubei province, China. The hybrid system consisted of an integrated vertical flow constructed wetland (IVF CW) (a down-flow VF CW and an up-flow VF CW) and a horizontal subsurface flow constructed wetland (HSF CW). The influent for the hybrid CW containing chemical oxygen demand (COD), total phosphorus (TP), total nitrogen (TN), and ammonium nitrogen (NH4+-N) with mean concentrations of 152, 0.75, 18.9, and 8.9 mg L-1, respectively, was purified by the hybrid CW system to achieve mean removal efficiencies of 59.0% COD, 82.8% TP, 57.7% TN, and 79.2% NH4+-N over a 9-month period. The nitrification intensity of the media in the down-flow VF CW was the highest compared to the other CWs, whereas the denitrification intensity of the media in the HSF CW was significantly higher than the IVF CW. The abundance of nitrifying bacteria in the media of the IVF CW was higher than in the HSF CW, while a higher abundance of denitrifying bacteria was found in the HSF CW compared to the IVF CW, suggesting that the HSF CW was more suitable for the growth of denitrifying bacteria.
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