两种材质超滤膜在饮用水处理中的比较研究

Comparison of two kinds of ultrafiltration membranes in treatment of drinking water

采用PVC合金和PVDF 2种材质的浸没式超滤膜对南方某水厂受污染的水源进行中试试验,对比2种膜材质在净水处理中的应用性能。结果表明,浸没式超滤膜工艺对浊度、细菌总数和有机物具有较好的去除效果:出水浊度稳定在0.1 NTU以下,高锰酸盐指数低于3 mg/L,细菌总数和大肠菌群数均达到GB 5749—2006《生活饮用水卫生标准》的要求。在净水效能对比分析中,2种材质的超滤膜性能表现基本相当。试验同时对比了2种超滤膜的膜污染及能耗情况,PVDF超滤膜在抗污染性能及吨水能耗上要优于PVC合金超滤膜。

In order to contrast the water purifying capacity of two kinds of immersed uhrafihration （UF） membranes that made of PVC and PVDF, a pilot test on contaminated water source treatment was carried out in a waterwork in southern China. The results showed that, immersed UF membrane process had good removal effect on turbidity, bacteria and organic matters： the effluent turbidity stabilized below 0.1 NTU, the permanganate in- dex was lower than 3 mg/L, and both the total bacteria count and the coliform group count could meet the speci- fication of GB 5749--2006 Sanitar standard for drinking water. Through the comparative analysis between the said two kinds of UF membranes made of different materials, it could be seen that, the purification performances of them was similar. The pollution and energy consumption conditions of the mentioned membranes were also tested, and the results showed that, the UF membrane made of PVDF was superior to the alloy UF membrane made of PVC for its better antifouling ability and lower energy consumption when treating a ton of water.