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基于超滤膜对有机物去除率低、膜污染严重的现状,分析了粉末活性炭协同超滤膜运行效果.采用粉末活性炭-超滤(PAC-UF)组合工艺处理微污染原水,对比了PAC-UF组合工艺与单独UF工艺对浊度和有机物的去除效果.研究了PAC投加量对PAC-UF组合工艺的污染物去除效能以及对超滤运行性能的影响.结果表明:通过与PAC联用,UF工艺对有机物的去除率明显提高,对CODMn和UV254的去除率均在56%以上,并随着投炭量的增加呈递增趋势.组合工艺对浊度的去除率很高,但出水浊度略高于单独UF工艺,并且随着投炭量的增加略呈上升趋势,但均低于0.20 NTU.投加PAC能够有效减缓膜污染,随着投炭量的增加,跨膜压差增长变缓;但过大投炭量反而会加剧膜污染的速率,最佳PAC投加量为2~10 g/L.
Based on the fact that ultrafiltration membrane has low organic removal rate and serious membrane fouling, the running effect of the synergistic ultrafiltration membrane was analyzed.The PAC-UF combined PAC-UF process was used to treat the micro-polluted raw water, Combined process and separate UF process on the removal of turbidity and organic matter.The effect of PAC dosage on the pollutant removal efficiency and ultrafiltration performance of PAC-UF combined process was studied.The results showed that: by combining with PAC, UF process significantly improved the removal of organic matter, the removal rate of CODMn and UV254 were above 56%, and with the increase of the amount of carbon was an increasing trend of combined process turbidity removal rate is high, but the water turbidity Slightly higher than the single UF process, and with the increase of the amount of carbon slightly increased, but were lower than 0.20 NTU. Adding PAC can effectively reduce the membrane fouling, with the amount of carbon increased, the transmembrane pressure drop increased However, the excessive carbon rate will aggravate the rate of membrane fouling. The best PAC dosage is 2 ~ 10 g / L.