微滤膜净化长江上游水的试验研究

PURIFICATION OF RAW WATER IN UPSTREAM OF YANGTZE RIVER WITH MICROFILTRATION MEMBRANE

对适合于长江上游水的管式微滤膜进行了选择性试验,探讨了适合膜的清洗方法以及在不同条件下膜设备运行的稳定性。试验结果表明:如果原水无任何预处理,0.2～0.9μm孔径微滤膜更适合净化长江上游重庆段原水,且气、水清洗效果优于单独水反洗;若NaOH溶液浓度高于0.01mol/L、HCl溶液浓度高于0.0079mol/L时,膜通量能得到较好恢复;工况稳定性试验表明,该设备能够保证出水水质稳定,同时只要后续工况能够恢复正常,也能保持较好的产水能力。

A selective test for tubular microfiltration membrane was done for treatment of the upstream water of Yangtze River, and the inquiry into suitable washing method for membrane and stability test under different operating conditions were carried out. The results showed that, without pretreatment microfiltration membrane with pore size of0.2-09μm was more suitable to the purification of the raw water in the Chongqing section of Yangtze River＇s upstream; moreover the effect of air-water washing was superior to the single back washing; if the concentration of NaOH and HCI were higher than 0.01 and 0.0079mol/L respectively, the membrane flux could be recovered better; the stability test showed that the equipment can ensure water quality to be stable, further, the equipment capacity could be better kept so long as the following-up process kept normal.