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研究了连续流复三维电极-生物膜反应器在不同电流、温度和pH条件下的反硝化性能.结果表明,在电流从0mA增加至100mA的过程中,NO3--N去除率随电流增大而升高;电流为100mA时NO3--N去除率最高,达到了73.8%,出水NO3--N浓度为8.27mg.L-1;电流高于100mA时,NO3--N去除率略有下降.电流从0mA增加至150mA的过程中,NO2--N积累量先增加后减少;电流为60mA时NO2--N的积累最为严重.温度为31～35℃时,反硝化效果较好,出水NO3--N浓度低于10mg.L-1;温度为35℃时,NO3--N去除率最高,达到了85.5%.pH值为7.2～8.2时,反硝化效果较为理想,出水NO3--N浓度在10mg.L-1以下,NO2--N浓度低于1mg.L-1.该反应器具有较好的pH缓冲性能,进水pH从5.5上升至9.0的过程中,其出水pH可维持在7.6～8.2,NO3--N去除率在59.6%～80.2%.此外,电流、温度和进水pH还对氨氮的生成量和总磷的去除产生明显影响.通过复三维电极-生物膜反应器与纯电化学反应器的对比试验,对氨氮产生和总磷去除的可能原因进行了分析和探讨.
The denitrification performance of the continuous flow three-dimensional electrode-biofilm reactor under different current, temperature and pH conditions was studied.The results show that the removal efficiency of NO3 - N increases with the increase of current when the current is increased from 0mA to 100mA, While the NO3 - N removal rate reached the highest at 73.8% and the NO3 - N concentration was 8.27 mg.L-1 at the current of 100mA. When the current was higher than 100mA, NO3 - N removal rate decreased slightly When the current increases from 0mA to 150mA, NO2 - N accumulation firstly increases and then decreases, while NO2 - N accumulates the most seriously when the current is 60mA, and the denitrification is better at the temperature of 31 ~ 35 ℃, NO3 - N concentration is lower than 10mg.L-1; the removal rate of NO3 - N is the highest at 85 ℃ when the temperature is 35 ℃, and the denitrification effect is good when pH value is 7.2 ~ 8.2, N concentration below 10mg.L-1, NO2 - N concentration below 1mg.L-1. The reactor has a good pH buffer performance, the water inlet pH increased from 5.5 to 9.0, the effluent pH The removal rate of NO3 - N was between 59.6% and 80.2% at 7.6 ~ 8.2. In addition, the current, temperature and influent pH had a significant effect on the formation of ammonia nitrogen and the removal of total phosphorus. Through the complex three-dimensional electrode-biofilm Reactor and pure electrochemical anti Contrast tester, possible reasons for the removal of ammonia nitrogen and total phosphorus produced were analyzed and discussed.