采用两级CSTR反应器对实际生活污水亚硝化的启动过程及稳定运行主要影响因素进行了研究.通过向生活污水里投加(NH4 )2SO4来提高进水氨氮浓度,并逐渐调整两级反应器的曝气强度至 DO 浓度分别为(1.5±0.12),(0.35±0.1)mg/L,历经 45d 即实现了亚硝化的启动,亚硝化率保持在 90.3%以上,氨氧化率保持在 91.2%以上.低氨氮生活污水运行时,通过第一级反应器中三组 DO/ALR 的效果对比,表明DO/ALR在1.2~2.0mgO2/(gN·d)时亚硝化效果最好.降低氨氮浓度以及增大HRT两种情况下导致ALR改变时,维持上述DO/ALR范围依然可以保证亚硝化的稳定.%The start-up and main factor of stable operation of partial nitrification in aconfiguration of two CSTR using domestic wastewater were studied. By adding (NH4)2 SO4 to the domestic wastewater to improve the ammonia nitrogen concentration, and gradually controlling the two reactor DO to 1.5±0.12, 0.35±0.1mg/L, more than 90.3% nitrite accumulation rate and 91.2% removal ammonia rate could be achieved after 45d. Under low ammonia domestic wastewater, through the comparison of the three groups of DO/ALR in the first reator, it showed that the effect of DO/ALR in 1.2~2.0mg O2/g N·d was the best. To decrease the concentration of ammonia nitrogen and increase the ratio of HRT to ALR, the maintenance of the DO/ALR ratio can also ensure the stability of the partial nitrification.
展开▼
