The nitrogen removal performance and microbial communities in a two-stage deep sequencing constructed wetland for advanced treatment of secondary effluent

被引：48
作者：
He, Shuang [1 ]
Wang, Yingmu [1 ]
Li, Chuansong [2 ]
Li, Yancheng [1 ]
Zhou, Jian [1 ]
机构：
[1] Chongqing Univ, Minist Educ, Key Lab Three Gorges Reservoirs Ecoenvironm, Chongqing 400045, Peoples R China
[2] China Railway Eryuan Engn Grp Co Ltd, Chengdu 610031, Sichuan, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2018年 / 248卷
关键词：
Secondary effluent; Tertiary treatment; Two-stage DSCW; Nitrogen removal; Microbial communities; WASTE-WATER TREATMENT; HORIZONTAL SUBSURFACE FLOW; INTERMITTENT AERATION; BACTERIA; ORGANICS; SYSTEM; DENITRIFICATION; STRATEGY; BIOMASS; DESIGN;
D O I：
10.1016/j.biortech.2017.06.150
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The advanced treatment of secondary effluent was conducted in a two-stage deep sequencing constructed wetland (DSCW) which comprised a denitrification chamber (W1) and a nitrification chamber (W2). The results showed that a superior NO3-N removal rate was observed in W1 with a C/N ratio of 6.5, and a high NH4+-N removal rate was obtained when the W2 was operated with 6-h duration of idle. In the long-term operation for 45 days, the two-stage DSCW pilot system achieved high and stable removal of TN, NH4+-N and NO3-N, which were 92.9%, 83.7% and 95.6% in average, respectively. The microbial communities between W1 and W2 were significant different. Rich diversity of the microbial community and the high proportion of denitrifying bacteria in the W1 were essential for nitrogen removal in this treatment system. AOB in the W2 played a major role in NH4+-N removal in W2. (C) 2017 Published by Elsevier Ltd.
引用
收藏
页码：82 / 88
页数：7
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