低温下改良型ICEAS工艺处理生活污水

DOMESTIC SEWAGE TREATMENT BY MODIFIED ICEAS UNDER LOW TEMPERATURE CONDITION

采用改良型ICEAS工艺进行低温污水处理,考察了低温条件下改良型ICEAS工艺去除有机物及脱氮除磷的效果。实验结果表明在温度为5￣13℃时,改良型ICEAS工艺对生活污水中的有机物、氨氮、总氮及总磷的平均去除率分别达到87%、64%、60%和78%,较常温下的去除率分别降低了4%、20%、28%和4%。低温时活性污泥中微生物种群有所减少,但污泥沉降性能良好,因此改良型ICEAS有利于防止污泥膨胀。

Sewage treatment by improved ICEAS process was carried out at low temperature; the effect of organics, nitrogen and phosphorus removal by improved ICEAS process was investigated. It was showed that, when temperature was within 5-13℃ ,the average removal rate of organics, ammonia nitrogen, TN and TP by the improved ICEAS process reached to 87%,64%,60% and 78% respectively, lowering by 4%,20%,28% and 20% respectively, compared with the conditions of ordinary temperature; microorganism population in activated sludge at low temperature decreased some what, but the sludge sedimenting performance was better, indicating that the improved ICEAS is advantageous to sludge protection against expansion.