【摘要】 在进水氨氮浓度为 85 6mg/L ,低溶解氧浓度下迅速启动并运行了亚硝化反应器 ,考察了反应器中氨氮的氧化和亚硝酸氮的积累情况。试验结果表明 :在其他工况不变的条件下长期运行 ,DO浓度对氨的氧化和亚硝酸积累具有显著影响。当DO在 0 2mg/L以上时 ,亚硝酸氮能够在反应器中完全稳定地积累 ;当DO小于 0 2mg/L时 ,氨氮的氧化作用显著下降 ;当DO增加到 1 5mg/L以上时 ,氨氮的氧化作用明显改善 ,反应器具有很好的抗DO变化的能力。反应器在高氨氮浓度和低DO条件下长期运行 ,可以完全抑制亚硝酸氧化菌 ,反应器中已经培养出较纯的氨氧化细菌更多还原

【Abstract】 A nitrification reactor was quickly started up and operated under low DO concentration with the influent concentration up to 856 mg NH + 4/L. The oxidation of ammonium and nitrite accumulation were investigated. The results show that the DO significantly influenced the oxidation of ammonium and nitrite accumulation while other operation parameters fixed at DO>0 2 mg/L. The oxidation of ammonia decreased dramatically at DO<0 2 mg/L. When DO was adjusted to a level more than 1 5 mg/L, the ammonia was oxidized and transformed to nitrite completely along with the significant increase in ammonia oxidation. The reactor shows good performance to tolerate the DO variation. The growth of nitrite-oxidizer has been totally inhibited in the reactor due to high ammonium-oxidizer concentration and low DO level with long-term operation.更多还原