Effects of influent COD/TN ratio on nitrogen removal in integrated constructed wetland-microbial fuel cell systems

被引：66
|
作者：
Wang, Xiaoou [1 ]
Tian, Yimei [1 ]
Liu, Hong [2 ]
Zhao, Xinhua [1 ]
Wu, Qing [1 ]
机构：
[1] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300350, Peoples R China
[2] Oregon State Univ, Dept Biol & Ecol Engn, 116 Gilmore Hall, Corvallis, OR 97331 USA
来源：
BIORESOURCE TECHNOLOGY | 2019年 / 271卷
关键词：
Constructed wetland; Microbial fuel cell; COD/TN; Nitrogen; Denitrification; C/N RATIOS; DENITRIFICATION; BACTERIA; WATER;
D O I：
10.1016/j.biortech.2018.09.039
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Given that the relationship between the influent C/N (generally referred to as COD/TN) ratio and nitrogen removal has not been well understood in integrated constructed wetland-microbial fuel cell (CW-MFC) systems, this study aimed to investigate the effects of COD/TN ratio on nitrogen removal in CW-MFCs. Results showed that the MFC could reduce the dependence of denitrification on organic carbon sources in CWs, and influent COD/TN ratios >= 3 could result in a TN removal of 90.30-91.46% in CW-MFCs. Moreover, the MFC could significantly enhance TN removal by 4.81% to 15.48% when the influent COD/TN ratios decreased from 9.00 to 1.23 in CWs. The lower the influent COD/TN ratio was, the stronger the enhancement of the MFC. There was a significant positive relationship (R-2 > 0.99) between the electricity output and influent CODCr concentration (50-360 mg/L) in the CW-MFC.
引用
收藏
页码：492 / 495
页数：4
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