加入多孔球形颗粒微生物燃料电池的性能研究

Study on property of microbial fuel cell with porous spherodial particles

设计了一个典型的双室微生物燃料电池,并考察了在阳极室加入多孔球形颗粒条件下对人工合成污水产电性能的影响。实验发现,加入多孔球形颗粒后,最高电压从不加颗粒的253 mV提高到280 mV,持续产电时间从5.5 d提高到8 d,COD去除率从78%提高到82.6%。进一步的实验发现,加入多孔球形颗粒后,系统内阻从286Ω降低到199.4Ω,最大功率密度从78.6 mW/m2提高到114.3 mW/m2。结果表明,微生物易于在多孔球形颗粒上附着和生长,颗粒通过均匀搅拌与阳极表面产生持续碰撞,有利于胞外电子传递到阳极,这一过程大大减小阳极的内阻,增大电池的输出电压进而增大输出功率,从而显著提高电池的产电性能。

A typical two-chamber microbial fuel cell was designed in the experiment.When adding porous spherodial particle into the anodic chamber,the influence on the property of power generation of man-made wastewater was obviously.During the experiment,when adding spherodial particle,the maximum voltage could be enhanced from 253 mV to 280 mV,the time of continuous power output generation changed from 5.5 d to 8 d,the removal rate of COD increased from 78% to 82.6%.When porous spherodial particle was added into the anodic chamber,the system internal resistance decreased from 286 Ω to 199.4 Ω,and the maximum power density changed from 78.6 mW/m^2 to 114.3 mW/m^2.The result indicated that microorganism was prone to cling and grow on the surface of porous spherodial particle.Through even mixing,the particles collided continuously on the anode,it was good for the extracellular electron transfer to the anode.In this process,the anodic internal resistance decreased,the output voltage generation was promoted,the maximum output power could be promoted,and so,the electrogenesis capacity was prominent improved.