Purification ability and carbon dioxide flux from surface flow constructed wetlands treating sewage treatment plant effluent
Purification ability and carbon dioxide flux from surface flow constructed wetlands treating sewage treatment plant effluent
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处理污水处理厂废水的地表流人工湿地的净化能力和二氧化碳通量。
DOI：
10.1016/j.biortech.2016.08.030
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发表时间：
2016
影响因子：
11.4
通讯作者：
Liu Hai
中科院分区：
文献类型：
--
作者：
Wu Haiming;Lin Li;Zhang Jian;Guo Wenshan;Liang Shuang;Liu Hai
在这项研究中，进行了为期两年的实验，以探讨二氧化碳（CO2）通量的变化，从自由水面人工湿地（FWS CW）系统处理污水处理厂的出水，并评估处理性能。种植CW系统对COD、NH_4 ~+-N、TN和TP的去除率分别为74.6%~ 76.6%、92.7%~ 94.4%、60.1%~ 84.7%和49.3%~ 70.7%。在整个研究期间，种植CW是一个净CO2汇，而未种植CW是一个净CO2源。2012-2013年，不同湿地系统CO2通量的年变化和季节变化都很明显，平均变化范围为−592.83 mg m− 2 h − 1 ~ 553.91 mg m− 2 h − 1。此外，温度对CW系统与大气之间的CO2净交换有显著影响，植物的存在对CO2排放总量也有显著影响。
In this study, a two-year experiment was carried out to investigate variation of carbon dioxide (CO2) flux from free water surface constructed wetlands (FWS CW) systems treating sewage treatment plant effluent, and treatment performance was also evaluated. The better 74.6–76.6% COD, 92.7–94.4% NH4+-N, 60.1–84.7% TN and 49.3–70.7% TP removal efficiencies were achieved in planted CW systems compared with unplanted systems. The planted CW was a net CO2sink, while the unplanted CW was a net CO2source in the entire study period. An obvious annual and seasonal variability of CO2fluxes from different wetland systems was also presented with the average CO2flux ranging from −592.83 mg m−2h−1to 553.91 mg m−2h−1during 2012–2013. In addition, the net exchange of CO2between CW systems and the atmosphere was significantly affected by air temperature, and the presence of plants also had the significant effect on total CO2emissions.