亚铁离子对厌氧氨氧化反应器脱氮性能的影响

Effect of Iron Ions on Denitrification Performance in Anammox Reactor

研究通过投加厌氧氨氧化污泥,待反应器稳定运行后考察不同浓度Fe2+对厌氧氨氧化污泥活性的影响.实验结果表明:经过210 d的连续培养,发现Fe2+可以促进厌氧氨氧化菌的细胞合成并且增加其基质代谢,当溶液中Fe2+浓度为0.085 mmol/L(4.76 mg/L)时,氨氮转化率维持在90%以上;添加Fe2+可以增加厌氧氨氧化菌亚铁血红素含量.此时样品中亚铁血红素C含量达到0.143μmol/mg,是同期对照反应器的2.04倍.通过SEM电镜发现当Fe2+浓度为0.085 mmol/L时,厌氧氨氧化菌群结构与形态趋于稳定.

The effect of different concentration of Fe2 ＋on the activity of anaerobic ammonium oxidation sludge was experimentally investigated by the addition of anammox sludge in stable operation at reactor. The experimental results showthat： Fe2 ＋can promote cell synthesis of anaerobic ammonia oxidation bacteria and increase its matrix metabolism, through 210 days continuous operation. When the concentration of Fe2 ＋in the solution is 0. 085 mmol / L（ 4. 76 mg /L）,the ammonia nitrogen conversion rate remains at more than 90%. The heme content of anaerobic ammonia oxidation bacteria is increased by the addition of Fe2 ＋. At this point,the heme C content reaches 0. 143 μmol / mg in the sample. It is 2. 04 times heme content of anaerobic ammonia oxidation bacteria in comparison reactor at the same period. It is found that using SEMwhen the concentration of Fe2 ＋is 0. 085 mmol / L,the anaerobic ammonia oxidation bacteria form approaches to a steady state.