微生物燃料电池阳极氨氮去除的影响因素

The factors in ammonia nitrogen removal of microbial fuel cell anode

为研究温度、pH值、碳氮比(C/N)这3种影响因子对氨氮去除率和产电的影响,构建了以氨氮为底物的双室微生物燃料电池,通过改变影响因子得出微生物燃料效果最佳时的调控值.结果表明,30℃时产电微生物最活跃,氨氮去除率为77.70%,电压为50.3mV;pH值既影响氨氮的物理挥发又影响其生物去除,将pH控制在7.5±0.5偏碱性环境时电压和容积脱氮速率都取得较好效果;有机物的添加会改变微生物燃料电池中的优势菌种,进而影响氨氮去除和产电情况.综合考虑氨氮去除率和电压可将C/N=1:4作为最佳调控值.

In order to study the effect of temperature,pH,C/N on ammonia nitrogen removal and power generation,a two-chamber microbial fuel cell（MFC） with ammonia nitrogen as the substrate is produced. And the optimum values of factors in MFC are achieved. Results show that, when temperature is 30 ℃, the microorganism is most active,the removal is 77.7%, and the voltage is 50.3mV. pH affects both ammonia＇s physical volatilization and biological removal. When it is alkaline（7.5±0.5）, both ammonia removal and voltage obtain the best effect. The addition of organic matter changes the dominant species in MFC, and further affects the removal and power generation. C/N = 1 ： 4 can be used as the optimal control value in the treatment of ammonia nitrogen wastewater.