复合垂直流人工湿地-微生物燃料电池耦合系统产电性能和水质净化

Power production performance and water purification of composite vertical flow constructed wetland-microbial fuel cell(CW-MFC)coupling system

人工湿地(CW)和微生物燃料电池技术(MFC)是两种具有潜力的环境技术,用于水污染治理和可再生能源生产。目前大部分研究主要针对上流式人工湿地-微生物燃料电池进行探索,很难用到实际的人工湿地上。主要以垂直流人工湿地为研究对象,研究复合垂直流人工湿地-微生物燃料电池耦合系统的产电性能和水质净化作用。结果表明,在相同的垂直流CW-MFC系统中,产电性能和水体污染物的含量有一定的关系;在模拟自然的水流情况下,CW-MFC1阳极生物氧化产生的质子和电子迁移至CW-MFC2的阴极也能同其电子受体发生氧化还原反应,从而产生电压电流,且其电压高于单一垂直流CW-MFC系统;模拟自然情况下的CW-MFC系统对各项水质指标的去除都有不错的去除效果,其中磷酸盐和总磷的去除率为97.5%和97.9%,氨氮和总氮的去除率为86.4%和66%,COD去除率最低为36.5%,表明复合垂直流CW-MFC系统对水体污染物的去除起明显的效果。

Artificial wetland(CW)and microbial fuel cell technology(MFC)are two potential environmental technologies that are used for water pollution control and renewable energy production.At present,most studies are mainly explored for high-end artificial wetlands-microbial fuel cells,and it is difficult to be used in the actual artificial wetland.Therefore,this article mainly takes vertical flow artificial wetlands as the research object to study the performance and water purification effect of composite vertical artificial wetland-microbial fuel cell coupling system.The results show that in the same vertical current CW-MFC system,the performance of electricity production has a certain relationship with the content of water pollutants;In the case of simulating natural water flow,protons and electrons generated by CW-MFC1 anode biological oxidation can migrate to CW-MFC2 cathode,and undergo oxidation-reduction reactions with its electron acceptors to generate voltage current.Its voltage is higher than a single vertical flow CW-MFC system.In the case of simulation,the CW-MFC system has a good removal effect on various water pollutants.Among them,the removal efficiency of phosphate and total phosphorus is 97.5%and 97.9%.The removal efficiency of ammonia nitrogen and total nitrogen is 86.4%and 66%,and the minimum removal efficiency of COD is 36.5%.It indicates that of water body pollutants are effectively removed in the composite vertical streaming CW-MFC system.