Effects of iron-based substrate on coupling of nitrification, aerobic denitrification and Fe(II) autotrophic denitrification in tidal flow constructed wetlands

被引：43

作者：

Cao, Xuekang ^{[1
,2
]}

Zheng, Hao ^{[1
]}

Liao, Yong ^{[1
,3
]}

Feng, Lihua ^{[1
,4
]}

Jiang, Lei ^{[1
]}

Liu, Caocong ^{[1
]}

Mao, Yuanxiang ^{[1
]}

Shen, Qiushi ^{[1
]}

Zhang, Qian ^{[1
]}

Ji, Fangying ^{[1
,5
]}

机构：

[1] Chongqing Univ, Coll Environm & Ecol, Chongqing 400045, Peoples R China

[2] China Southwest Municipal Engn Design & Res Inst C, Chengdu 610081, Peoples R China

[3] Dongfang Elect Machinery Co Ltd, Deyang 618000, Peoples R China

[4] Chengdu Engn Consulting Co Ltd, Chengdu 610072, Peoples R China

[5] Chongqing Univ, Coll Environm & Ecol, 174 Shazheng St, Chongqing 400045, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2022年 / 361卷

关键词：

Tidal flow; Fe(II) autotrophic denitrification; Aerobic denitrification; Steel slag; Rural sewage treatment; WASTE-WATER TREATMENT; NITROGEN REMOVAL; STEEL SLAG; PERFORMANCE; CAPACITY; DYNAMICS; KINETICS; BIOFILM;

D O I：

10.1016/j.biortech.2022.127657

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The aerobic properties of nitrification and the anaerobic properties of denitrification in constructed wetlands are difficult to reconcile. In this study, two constructed wetlands were constructed with pyrite and steel slag in combination with zeolite, and their respective nitrification and denitrification capacities were evaluated under different tidal strategies. The steel slag wetland achieved 70.89 % and 46.04 % removal rates of NH4+-N and total nitrogen (TN), and the carbon consumption of denitrification was 1.51 mg BOD/mgN, which was better than pyrite wetland. Microbial analysis showed that Fe(II) autotrophic denitrification and aerobic denitrification occurred in both wetlands, and they were coupled with nitrification to achieve simultaneous removal of NH4+-N and TN. Microbial co-occurrence network and k-core decomposition analysis indicated that the core genus of steel slag wetlands was nitrifying bacteria. This study provides new insights into the application of tidal flow wetlands to treat rural sewage.

引用

页数：11

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