期刊
BIORESOURCE TECHNOLOGY
卷 227, 期 -, 页码 7-14出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.12.046
关键词
Biofilm-electrode reactor; Constructed wetland; Current intensity; Inorganic nitrogen removal; Autotrophic denitrifying bacteria
资金
- National Key Technology Support [2015BAB07B09]
- National Nature Science Foundation of China [51309503, 51679041, 51279207]
The constructed wetland coupled with biofilm-electrode reactor (CW-BER) is a novel technology to treat wastewater with a relatively high level of total inorganic nitrogen (TIN) concentration. The main objective of this study is to investigate the effects of C/Ns, TIN concentrations, current intensities, and pH on the removal of nitrogen in CW-BER; a control system (CW) was also constructed and operated with similar influent conditions. Results indicated that the current, inorganic carbon source and hydrogen generated by the micro-electric field could significantly improve the inorganic nitrogen removal with in CW-BER, and the enhancement of average removal rate on NH3-N, NO3-N, and TIN was approximately maintained at 5-28%, 5-26%, and 3-24%, respectively. The appropriate operation conditions were I = 10 mA and pH = 7.5 in CW-BER. In addition, high-throughput sequencing analysis implied that the CW-BER reactor has been improved with the relative abundance of autotrophic denitrifying bacteria (Thiobacillus sp.). (C) 2016 Elsevier Ltd. All rights reserved.
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