低碳氮比条件下膜生物反应器处理高氨氮废水时稳定亚硝化过程的建立

Establishment of Stable Nitritation Process in a MBR Reactor for Treatment of High Ammonia Wastewater with Low C/N Ratio

以人工配制高氨氮低碳氮比（C/N）废水为进水,采用膜生物工艺,通过控制亚硝化池内温度为28～30℃,溶解氧浓度为0.5 mg/L,水力停留时间为12 h,pH为7.8～8.0,进水氨氮浓度为200 mg/L、CODCr为40 mg/L,在亚硝化池中成功实现了C/N为1∶5条件下废水的亚硝化。经过14 d的运行时间,污泥龄控制在100 d,在膜生物反应器（MBR反应器）中得到了稳定的亚硝酸盐氮积累。将氨氮浓度分别提高至400和800 mg/L的情况下,其亚硝化菌的耐受浓度负荷冲击能力均较强。

Taking synthetic wastewater of the high ammonia nitrogen and low CN ratio as the influent,the membrane bio-reactor（ MBR） was used to study establishment of stable nitritation process. The main parameters of the reactor were controlled as follows： the temperature of nitritation tanks was 28-30 ℃,dissolved oxygen（ DO）was 0. 5 mg/L,HRT was 12 h,pH was 7. 8-8. 0,influent ammonia concentration was 200 mg/L,CODCrwas 40mg/L. Under these conditions,the nitritation of wastewater with C/N of 1∶5 was realized in the nitritation tanks.After 14 days,sludge age was 100 days,a stable nitrite nitrogen accumulation was achieved. When the ammonia concentration was increased to 400 and 800 mg/L,respectively,the tolerance of nitrosobacteria against shock of high ammonia load was relatively high.