Influence of C/N ratio on MBBR denitrification for advanced nitrogen removal of wastewater treatment plant effluent

被引：16
|
作者：
Yuan, Quan [1 ,2 ]
Wang, Hai-yan [1 ,2 ]
Chu, Zhao-sheng [1 ,4 ]
Hang, Qian-yu [1 ,2 ]
Liu, Kai [1 ,2 ,3 ]
Li, Chun-mei [1 ,2 ]
机构：
[1] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, 8 Da Yang Fang, Beijing 100012, Peoples R China
[2] Chinese Res Inst Environm Sci, Res Ctr Water Pollut Control Technol, 8 Da Yang Fang, Beijing 100012, Peoples R China
[3] Henan Polytech Univ, Jiaozuo 454150, Peoples R China
[4] Chinese Res Inst Environm Sci, Res Ctr Lake Ecoenvironm, 8 Da Yang Fang, Beijing 100012, Peoples R China
来源：
DESALINATION AND WATER TREATMENT | 2017年 / 66卷
关键词：
C/N ratio; Denitrification genes; Denitrification MBBR; qPCR; WWTP effluent; ORGANIC-MATTER FLUORESCENCE; CARBON-SOURCES; GENES; NOSZ; QUALITY; MATRIX; NIRS;
D O I：
10.5004/dwt.2017.0263
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
High total nitrogen (TN) content is an urgent issue for the reuse of wastewater treatment plant (WWTP) effluent, and moving bed biofilm reactor (MBBR) is preferable for advanced denitrification of WWTP effluent. The influence of COD/NO3--N (hereinafter referred to as C/N) ratio on nitrate removal was studied. The results showed that the denitrification rate was influenced by influent NO3--N concentration, and the maximum value (13.9 +/- 2.7 mg NO3--N.(L.d)(-1)) was achieved for 4.6 C/N ratio; dissimilatory nitrate reduction to ammonium (DNRA) might be occurred under higher C/N ratios (8.0 and 8.4), and reduced the TN removal rate because of NH4+-N accumulation. Dissolved organic matter (DOM) concentration of effluent was lower than that of influent, except for 6.7 C/N ratio. 8.0 C/N ratio had the lowest community structure diversity and evenness of denitrification nosZ gene, and the narG and nosZ gene content of 4.6 C/N ratio was the highest. Overall, 4.6 C/N ratio was the optimum choice for nitrogen removal of WWTP effluent by denitrification MBBR.
引用
收藏
页码：158 / 165
页数：8
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