超滤深度处理煤矿工业广场生活污水试验研究

为解决煤矿工业广场生活污水再生利用的问题,采用超滤技术对二级生化出水进行深度处理试验研究.结果表明:超滤对浊度、CODcr及NH4+-N的平均去除率分别为94.1％、24.8％和32.7％,对粪大肠菌群数的去除率大于99.99％.在操作压力小于0.16MPa的情况下,膜通量随操作压力的提高而线性增大；当操作压力大于0.2 MPa后,膜通量受操作压力的影响较小,继续提高操作压力会加剧膜的污染,周期反冲洗能够有效抑制膜通量的下降.超滤在过滤15m in后反冲洗1min的条件下运行16h,膜通量仅下降7.3％.

EXPERIMENTAL STUDY ON THE ADVANCED TREATMENT OF DOMESTIC SEWAGE FROM INDUSTRIAL SQUARE OF A COAL MINE BY ULTRAFILTRATION

To solve the problems of reusing domestic sewage from industry square of a coal mine, the experiment was conducted by ultrafihration to treat the effluent from a secondary biochemical process. The results show that the average removal rates of turbidity, CODcr and NH4^＋-N by ultrafihration were 94.1%, 24.8 % and 32.7 %, respectively. The removal rate of fecal coliform was greater than 99.99 %. When the operating pressure was less than 0.16 MPa, the membrane flux increased linearly with it. However, the membrane flux would not change much when the working pressure was greater than 0.2 MPa. In addition, higher pressure would reinforce the membrane fouling, and periodic backwashing could restrain the decrease of membrane flux. The membrane flux decreased merely by 7.3% after 16 h on condition that the uhrafihration was operated at backwashing time of 1 min after filtering 15 min.