利用人工湿地型微生物燃料电池（CW-MFC）处理六价铬[Cr （Ⅵ）]废水可实现同步产电。考察了不同电极间距下COD质量浓度、Cr （Ⅵ）质量浓度及水力停留时间（HRT）对处理含铬废水及同步产电的影响。结果表明，随着COD和Cr （Ⅵ）质量浓度的增大，CW-MFC的电压先增大后减小。电极间距越小，欧姆电阻越小，但当电极间距为10 cm时系统的输出电压和功率密度最大，同时COD和Cr （Ⅵ）的去除率最高。随着HRT的延长，产电性能和污水处理能力先增大后减小。电极间距为10 cm时，最大功率密度和COD最高去除率分别458.24 mW/m³和92.50%（HRT为2 d），Cr （Ⅵ）最高去除率为92.96%（HRT为3 d）。

The constructed wetland coupled with microbial fuel cell (CW-MFC) is adopted to treat with hexavalent chromium[Cr(Ⅵ)]-containing wastewater and simultaneously generate power.The effects of COD mass concentration, Cr(Ⅵ) mass concentration and hydraulic retention time (HRT) on the treatment of chromium-containing wastewater and the simultaneous production of electricity at different electrode spacing are investigated.It is shown that the voltage of CW-MFC increases firstly and decreases then with the increases of COD and Cr(Ⅵ) mass concentrations.The smaller the electrode spacing, the smaller the ohmic resistance.The output voltage and power density of the system reaches the maximum, and the removal rates of COD and Cr(Ⅵ) reach the highest when the electrode spacing is 10 cm.With the elongation of HRT, the power production performance and wastewater treatment capacity increases firstly and decreases then.As the electrode spacing is 10 cm, the maximum power density and the highest removal rate of COD are 458.24 mW·m^-3 and 92.50% (HRT=2 d), respectively, and the maximum removal rate of Cr(Ⅵ) is 92.96% (HRT=3 d).

牟春霞(1990-),女,博士研究生,研究方向为水污染处理,muchxia2014@126.com。