期刊
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
卷 95, 期 4, 页码 1203-1215出版社
WILEY
DOI: 10.1002/jctb.6309
关键词
microbial fuel cell; Cupriavidus sp; S1; biocathode; nitrogen removal; bioelectrochemical denitrification
类别
资金
- Program for National Natural Science Foundation of China [51778397, 21776196]
- Innovative Projects for Post-graduate Education of Shanxi Province [2017BY063]
- International Cooperation Projects of Shanxi Province [201603D421040]
- National Key Research and Development Program [2016YFB0600502]
- Key Research and Development Plan of Shanxi Province [201603D321010]
BACKGROUND An innovative microbial fuel cell (MFC) using Cupriavidus sp. S1 as the biocathode catalyst was developed to improve nitrogen removal from low carbon/nitrogen (C/N) wastewater. RESULTS The desirable external resistance was 100 omega in this study, with an optimal total nitrogen (TN) removal efficiency of 95.71%, and a maximum current density and power density of 7583.89 +/- 318.11 mA m(-3) and 932 mW m(-3) at C/N = 2, respectively, which initially confirmed the ability of Cupriavidus sp. S1 to obtain electrons from the electrode. The maximum tolerance of the system at R-ext of 100 omega was C/N = 1, with a TN removal efficiency of 90.87%. Compared with the open circuit, the TN removal increased by approximately 21.60% and 52.02% at C/N = 2 and 1, respectively, which expanded the application area for the dominant denitrifying bacteria S1. Additionally, the system exhibits the obvious merits of less sludge production, low energy consumption and the recovery of some energy. CONCLUSION Based on these results, domesticated Cupriavidus sp. S1 possesses electrochemical activity. Thus, the system has great potential for efficient and cost-effective nitrogen removal from nitrate-containing low C/N wastewater and energy recovery. (c) 2019 Society of Chemical Industry
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