温度变化对厌氧氨氧化反应的影响

对一套处理效率高、运行稳定的UASB．生物膜厌氧氨氧化反应器进行了温度变化的实验研究。实验结果表明，厌氧氨氧化反应对温度变化比较敏感，温度从31℃下降到17℃后，反应器内的厌氧氨氧化活性受到显著抑制，氨氮、亚硝酸盐氮和总氮的平均去除率迅速从97．0％、94．1％、86．0％下降为46．2％、41．8％、35．5％。当历时2个月反应器温度逐渐从17℃升高到31℃时，反应器内高效厌氧氨氧化活性逐渐得到恢复。反应器在17℃停止运行2个月后，直接升温至31℃再次运行，仅仅需要17d时间，反应器内厌氧氨氧化高活性就得到恢复，氨氮、亚硝酸盐氮和总氮的最高去除率达到99．4％、90．6％和85．0％。厌氧氨氧化反应的最佳温度应为31℃。

Influence of temperature change on anaerobic ammonia oxidation reaction

The temperature influence on the anaerobic ammonia oxidation was observed in a set of operated well UASB-biofilm anaerobic ammonia oxidation reactor. The experimental results show that anaerobic ammonia oxidation reaction is sensitive to temperature change. When the temperature of reactor dropped from 31℃ to 17℃ quickly ,the anaerobic ammonia oxidation activity inside the reactor was significantly restrained and the average removal efficiencies of NH4＋ -N, NO2- -N and TN dropped from 97.0% , 94.1% and 86% to 46.2% , 41.8% and 35.5% respectively. When the temperature in reactor arose up to 31℃ in two months, the anaerobic ammo- nia oxidation activity recovered slowly; when the reactor after stayed for 2 months at 17℃ was restarted up at 31 ℃ directly, the high anaerobic ammonia oxidation activity can recover quickly in 17 days and the highest re- moval efficiency of NH4 -N, NO2- -N and TN reached 99.4% ,90.6% and 85.0% , respectively. The optimum temperature of anaerobic ammonia oxidation should be 31 ℃.