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为了研究PVC复合膜对高浊度微污染长江原水的处理效能,并考察不同清洗方式在高浊期对膜污染的控制效果,对LJ水厂的混凝—超滤短流程工艺进行了深入调研,并在不同浊度期进行了相关试验。结果表明,在高浊期,混凝—超滤短流程工艺对浊度的去除率>99%,出水平均浊度<0.1 NTU,对COD_(Mn)、氨氮、亚硝酸盐的平均去除率分别为37.2%、56.5%、22.4%;膜系统出水水质稳定,处理效果安全可靠,生物安全性好;浸入式超滤膜采用低通量、低跨膜压差运行时,物理清洗可有效延缓膜污染,化学清洗可有效控制膜污染,膜系统接近于零污染运行。
In order to study the treatment efficiency of PVC composite membrane on the raw water with high turbidity and slightly polluted Yangtze River water and investigate the effect of different cleaning methods on membrane pollution in high turbidity period, , And carried out the relevant tests in different turbidity period. The results showed that in the high turbidity period, the removal rate of turbidity was> 99% and the average turbidity of the effluent was less than 0.1 NTU. The average removal rates of COD Mn, ammonia nitrogen and nitrite were Which is 37.2%, 56.5% and 22.4% respectively. The water quality of the membrane system is stable, the treatment effect is safe and reliable, and the biological safety is good. When the immersion ultrafiltration membrane is operated with low flux and low transmembrane pressure difference, the physical cleaning can effectively delay the membrane Pollution, chemical cleaning can effectively control membrane pollution, membrane system is close to zero pollution operation.