Applying constructed wetland-microbial electrochemical system to enhance NH4+ removal at low temperature
文献类型：期刊论文
| 作者 | Yu, Bin; Liu, Chunlei; Wang, Shanyun ; Wang, Weidong; Zhao, Siyan; Zhu, Guibing
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2020-07-01 |
| 卷号 | 724页码:1-7 |
| ISSN号 | 0048-9697 |
| 关键词 | Low-temperature Enhanced NH4+ removal CW-MEC CW-MFC |
| 英文摘要 | NH4+ removal at low temperature (<10 degrees C) has baffled researchers and engineers for decades. Bioelectrochemical process has been increasingly valued as a promising approach to enhance NH4+ removal by both electrochemical and stimulated microbial processes. The feasibility and the mechanism of enhanced NH4+ removal were investigated in Constructed Wetland-Microbial Electrochemical System(CW-MES) with different electrode spacings including Constructed Wetland-Microbial Fuel Cell (CW-MFC) and Constructed Wetland-Microbial Electrolysis Cell (CW-MEC) at low temperature. Solar cell panel was firstly implemented in CW-MEC to enhance NH4+ removal. The low-temperature operation lasted for about four months, CW-MEC successfully enhanced NH4+ removal while CW-MFC did not exhibit positive effect. The NH4+-N removal efficiency of CW-MEC achieved 88.2 +/- 7.0%, which was 11.7 +/- 6.5% higher than conventional constructed wetland (CCW). The maximum NH4+-N removal efficiency of CW-MEC achieved 100%. The average NH4+-N mass removal rate was 436.02 mg m(-2) d(-1). It was found that NH4+ was mainly removed by the nitrification-autotrophic denitrification process in CW-MES while it was mainly converted to NO3- in CCW. Ammoxidation and denitrification were both enhanced by electricity while NH4+ was used as the main substrate for electricity generation. AOA (Candidatus Nitrosocosmicus) and NOB (Nitrospira) were the main contributors to nitrification. This study provided a cost-effective and sustainable method for electrochemically enhanced microbial NH4+ removal at low-temperature and revealed the relevant mechanism. (C) 2020 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45239]  |
| 专题 | 生态环境研究中心_中国科学院饮用水科学与技术重点实验室 |
| 推荐引用方式 GB/T 7714 | Yu, Bin,Liu, Chunlei,Wang, Shanyun,et al. Applying constructed wetland-microbial electrochemical system to enhance NH4+ removal at low temperature[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,724:1-7. |
| APA | Yu, Bin,Liu, Chunlei,Wang, Shanyun,Wang, Weidong,Zhao, Siyan,&Zhu, Guibing.(2020).Applying constructed wetland-microbial electrochemical system to enhance NH4+ removal at low temperature.SCIENCE OF THE TOTAL ENVIRONMENT,724,1-7. |
| MLA | Yu, Bin,et al."Applying constructed wetland-microbial electrochemical system to enhance NH4+ removal at low temperature".SCIENCE OF THE TOTAL ENVIRONMENT 724(2020):1-7. |
入库方式： OAI收割
来源：生态环境研究中心
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