有机物对厌氧氨氧化微生物燃料电池脱氮产电性能的影响

通过接种厌氧氨氧化污泥到微生物燃料电池阳极,成功启动厌氧氨氧化微生物燃料电池(ANAMMOX-MFC),研究了葡萄糖和苯酚对ANAMMOX-MFC脱氮产电性能的影响.结果表明,当葡萄糖浓度较低时(100~200 mg·L~(-1))时,对ANAMMOX菌有促进作用,ANAMMOX-MFC脱氮产电性能增强,此时反应器进出水COD浓度变化不大;当葡萄糖浓度高于300 mg·L~(-1)时,产电性能逐渐下降,NH+4-N去除率和去除速率逐渐下降,而NO-2-N去除率和去除速率基本保持不变,此时出水COD浓度也出现降低,说明厌氧氨氧化菌活性受到抑制,反硝化菌活性开始增强.极化曲线拟合程度较低,COD浓度变化对电池内阻影响较小.当苯酚浓度较低时(50~100 mg·L~(-1)),对ANAMMOX-MFC脱氮产电性能影响较低;当苯酚浓度超过200 mg·L~(-1)时,ANAMMOX-MFC脱氮产电性能逐渐被抑制.整个过程进出水COD浓度变化不大,极化曲线拟合程度较低,表观内阻有缓慢升高.

Effects of Organic Substrates on ANAMMOX-MFC Denitrification Electrogenesis Performance

An anaerobic ammonium oxidation microbial fuel cell (ANAMMOX-MFC) was successfully started by inoculating anaerobic ammonium oxide sludge into the anode of a microbial fuel cell and then used to study the effect of glucose and phenol on ANAMMOX-MFC denitrification electrogenesis performance. The results showed that the ANAMMOX bacteria promoted ANAMMOX-MFC denitrification when the concentration of glucose was low (100-200 mg·L^-1). At that time, the chemical oxygen demand (COD) concentration of the reactor was not significant. The electrogenesis production performance and NH₄⁺-N removal rate gradually decreased when the glucose concentration was higher than 300 mg·L^-1, but the NO₂^--N removal rate generally remained unchanged. The COD concentration was also reduced, indicating that the activity of the ANAMMOX bacteria was inhibited and the activity of denitrification bacteria began to increase. The polarization curve fitting degree was low, and the change in COD concentration had little effect on the battery internal resistance. When the concentration of phenol was low (50-100 mg·L^-1), there was little effect on ANAMMOX-MFC denitrification electrogenesis performance. When the concentration of phenol exceeded 200 mg·L^-1, ANAMMOX-MFC denitrification performance was gradually inhibited. Overall, in the process, the COD concentrations of the water influent and effluent changed little, the polarization curve fitting degree was low, and the apparent internal resistance increased slowly.