人工湿地-微生物燃料电池对高碳氮废水的强化净化和产电研究  

Enhanced Nitrogen Removal and Electricity Generation Efficiency by Constructed Wetland-Microbial Fuel Cell

作　　者：秦歌 陈婧 余仁栋 张轩波 冷欣[1,2] 安树青 QIN Ge;CHEN Jing;YU Ren-dong;ZHANG Xuan-bo;LENG Xin;AN Shu-qing(School of Life Science,Nanjing University,Nanjing 210023,China;Nanjing University Research Institute,Changshu,Co.,Ltd,Suzhou,Jiangsu 215500,China)

机构地区：[1]南京大学生命科学学院,南京210023 [2]南大(常熟)研究院有限公司,江苏苏州215502

出　　处：《湿地科学与管理》2021年第4期12-17,共6页Wetland Science & Management

基　　金：中国电力建设股份有限公司科技项目;江苏省农业科技自主创新资金项目(CX191004)。

摘　　要：采用人工湿地-微生物燃料电池工艺(CW-MFC)进行高COD高氮污水的强化脱氮并产生电能。搭建两组反应器CW和CW-MFC,探究耦合方式对水体污染物去除能力,并进一步探讨CWMFC的电路连接方式、阴阳极间距、进水方式等运行条件对污染物去除能力和产电的影响。结果表明:CW-MFC较CW有更显著的水体污染物COD、NH_(4)^(+)-N的去除能力。在阴阳极间距为25 cm、阴极栽有湿地植物的闭合回路CW-MFC装置中,最大开路电压可达到648.90 mV,稳定运行的CWMFC装置对COD和氨氮的去除率分别为86.00%和84.77%。由于间歇进水时阳极DO浓度波动更大,而连续进水方式更利于营造稳定的厌氧阳极环境,故连续进水的污染物去除效果更佳。本研究为CWMFC生态强化脱氮提供理论依据。The constructed wetland-microbial fuel cell process(CW-MFC)is used to enhance the denitrification of high COD and high nitrogen sewage and to generate electricity.In our study,two sets of reactors CW and CW-MFC were set up to compare the pollutant removal capacity.Moreover,the effect of circuit connection mode,anode and cathode spacing,water inlet mode and operating conditions was investigated on the pollutant removal capacity of CW-MFC.The results showed that the maximum open circuit voltage can reach 648.90 mV in a closed loop CW-MFC device with a cathode-anode spacing of 25 cm and wetland plants on the cathode.The stable operation of the CW-MFC device has a removal rate of 86.00% for COD and 84.77% for ammonia nitrogen,respectively.Continuous water inlet is more conducive to creating a stable anaerobic anode environment than intermittent water inlet,and the anode DO concentration fluctuates more for intermittent water inlet.The difference between the cathode and anode DO may be the main reason for the difference in the removal capacity of ammonia nitrogen between the two sets of devices.

关 键 词：人工湿地 微生物燃料电池 脱氮 产电 

分 类 号：X703.5[环境科学与工程—环境工程]