CAJ | 학술논문

构建了一种连续流无膜人工湿地-微生物燃料电池,其水力停留时间为2d.系统以葡萄糖为基质启动2～3d后,在外接电阻为1kΩ时,其稳定输出电流密度高于2 A/m3,同时,COD去除率大于90％.比较了阴阳极间距为10,20,30和40 cm的系统.当间距为20cm时,系统的产电电压、库仑效率和能量密度皆最高,分别为560 mV,0.313％和0.149 W/m3,且COD去除率也为最高,达到94.9％.此外,各系统中的DO最低浓度均出现在装置中部.结果表明,COD去除率越高,系统产能越高,因而库仑效率也越高.人工湿地-微生物燃料电池系统作为一种低成本及环境友好的污水处理同步产电技术显示出实际应用潜力.
구건료일충련속류무막인공습지-미생물연료전지,기수력정류시간위2d.계통이포도당위기질계동2～3d후,재외접전조위1kΩ시,기은정수출전류밀도고우2 A/m3,동시,COD거제솔대우90％.비교료음양겁간거위10,20,30화40 cm적계통.당간거위20cm시,계통적산전전압、고륜효솔화능량밀도개최고,분별위560 mV,0.313％화0.149 W/m3,차COD거제솔야위최고,체도94.9％.차외,각계통중적DO최저농도균출현재장치중부.결과표명,COD거제솔월고,계통산능월고,인이고륜효솔야월고.인공습지-미생물연료전지계통작위일충저성본급배경우호적오수처리동보산전기술현시출실제응용잠력.
A membrane-less constructed wetland microbial fuel cell (CW-MFC) is constructed and operated under continuous flow with a hydraulic retention time (HRT) of 2 d.Fed with glucose,the CW-MFC generates a stable current density of over 2 A/m3 with a resistor of I kΩ and has a chemical oxygen demand (COD) removal efficiency of more than 90％ after the startup of 2 to 3 d.A series of systems with the electrode spacings of 10,20,30 and 40 cm are compared.It is found that the container with the electrode spacing of 20 cm gains the highest voltage of 560 mV,the highest power density of 0.149 W/m3,and the highest Coulombic efficiency of 0.313％.It also has the highest COD removal efficiency of 94.9％. In addition, the dissolved oxygen (DO) concentrations are observed as the lowest level in the middle of all the CW-MFC reactors.The results show that the more COD is removed,the greater power is generated,and the relatively higher Coulombic efficiency will be achieved.The present study indicates that the CW-MFC process can be used as a cost-effective and environmentally friendly wastewater treatment with simultaneous power generation.