A novel filtration composite anode configuration of microbial fuel cell for efficient wastewater treatment and enhanced power generation
Microbial fuel cell (MFC) is an emerging technology for simultaneous wastewater treatment and energy recovery.It is a challenge for MFC to achieve both high-quality effluent and high power generation.In this study,a novel filtration composite anode has been proposed to enhance performance of COD removal and power generation simultaneously.The composite anode was a combination of a carbon brush and a carbon cloth,compared to the single brush and single cloth anode,and operated in filtration and circulation mode.High COD removal efficiency (>95%) was achieved with effluent COD lower than 40 mg/L with all conditions.COD removal rates were in accordance with first-order kinetics,but rate constants varied with anode configuration and operation.The rate constant of the composite anode in filtration mode was 0.33 h-1,much higher than that of single anode (0.23 h-1 of brush,0.18 h-1 of cloth) and composite anode in fed-batch mode (0.12 h-1).The maximum power density of filtration composite anode was 1140 mW/m2 at circulation rate of 2 mL/min and external resistance of 100 Ω,compared to 990 mW/m2 of brush anode and 80 mW/m2 of the cloth anode.Filtration composite anode showed stable performance in polarization test,compared with the power overshoot observed in composite anode under fed-batch mode.Moreover,filtration composite anode maintained higher current density of 10.0 A/m2 until COD reduced to 40 mg/L of 2 Ω external resistance.These results demonstrated that the filtration composite anode configuration improved the wastewater treatment and power generation,showing great promise for practical wastewater treatment application.
Microbial Fuel Cell Composite Anode Filtration COD Removal Power Generation
Ting Xu Qiuying Wang Shijia Wu Boya Fu Xiaoyuan Zhang Peng Liang Xia Huang
State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
国际会议
The 15th IWA World Conference on Anaerobic Digestion( 第15届IWA世界厌氧大会)
北京
英文
220-223
2017-10-17（万方平台首次上网日期，不代表论文的发表时间）