An intermittent aeration biological contact oxidation process was used to treat micro-polluted water in experiment. The removal effect of NH4+-N and CODMn by pulse aeration biological contact oxidation was studied under different intermittent conditions, and superiority of this technology comparing to continuous aeration bio-contact oxidation process was discussed. The results showed that when the intensity of aeration is 4 m3/(m2· h) and the ratio of without aeration time to aeration time is 6∶4 to 9∶1, the average removal rate of NH4+-N and CODMn achieved 69.49％ to 93.51％ and 21.12％ to 24.29％, respectively, and the biomass of bio-media was 265.53 nmol/m3 to 938.63 nmol/m3. The effect of intermittent aeration biological contact oxidation process to treat micro-polluted water is better than that in continuous aeration biological contact oxidation process when the ratio of without aeration time to aeration time is not less than 8:2 and the dissolved oxygen is not less than 4 mg/L. The intermittent aeration biological contact oxidation process saved 60％ to 80％ air volume than that of continuous aeration.%实验研究了不同间歇条件下,间歇曝气生物接触氧化法对微污染水的处理效果,比较了其对比连续曝气生物接触氧化法的优越性.结果表明,在曝气强度为4 m3/(m2·h),停曝比为6∶4～9∶1的间歇曝气条件下,间歇曝气生物接触氧化法对氨氮和CODMn平均去除率分别达到69.49%～93.51%和21.12%～24.29%,生物填料上的生物量为265.53～938.63nmol/m3.在保障溶解氧大于4 mg/L的前提下,停曝比大于等于8∶2,间歇曝气生物接触氧化法处理效果好于连续曝气生物接触氧化法,且比连续曝气生物接触氧化法节省气量60%～80%.
展开▼
