粉末活性炭回流/超滤工艺处理微污染原水  

Combined System of Powdered Activated Carbon Reflux and Ultrafiltration for Treatment of Micro-polluted Raw Water

作　　者：陶辉[1] 王伦[1] 陈卫[1,2] 周琦[1] 

机构地区：[1]河海大学环境学院,江苏南京210098 [2]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098

出　　处：《中国给水排水》2015年第1期36-40,共5页China Water & Wastewater

基　　金：苏州科技支撑计划项目(SS201303);河海大学自然科学基金资助项目(2008427411)

摘　　要：将含粉末活性炭的沉淀池排泥水回流至混合池,以强化系统对原水中氨氮和有机物的去除,并同超滤工艺联用,考察对膜污染的影响。结果表明:随着投炭量的提高,炭泥中生物量和生物活性均有所增加,对氨氮、有机物的去除率也越高,系统稳定时与0、100和200 mg/L的投炭量对应的氨氮去除率分别为36.9%、52.7%、61.5%,对CODMn的去除率分别为20%、35%和50%,对UV254的去除率分别为30%、40%和45%,且对消毒副产物前体物的去除效果也明显优于常规工艺。沉后水的浊度稳定在2.5 NTU左右,膜出水的浊度稳定在0.1 NTU以下;在30 L/(m2·h)的通量下,PVC膜能稳定运行,几乎没有产生不可逆污染,但当投加量过高时,跨膜压差有所升高。Sludge water containing powdered activated carbon （PAC） from sedimentation tank was refluxed to mixing tank to enhance the removal of ammonia nitrogen and organics. The powdered activated carbon reflux was combined with ultrafiltration, and the membrane fouling was investigated. The results showed that when the dosage of PAC was increased, the biomass and biological activity in the sludge con- taining PAC were increased, and the removal rates of ammonia nitrogen and organics were increased, too. The removal rates of 36.9%, 52.7% and 61.5% for ammonia nitrogen, of 20%, 35% and 50% for CODM. and of 30% , 40% and 45% for UV254 were achieved by the stable system when the dosages of PAC were 0 mg/L, 100 mg/L and 200 mg/L, respectively. The removal effect of disinfection by-product precursors by the combined system was significantly better than that by the conventional process. The tur- bidity of settled water stabilized at around 2.5 NTU, the turbidity of the effluent of ultrafiltration stabi- lized at 0. 1 NTU or less. At the flux of 30 L/（ m^2·h）, PVC membrane could operate stably almost without irreversible pollution, but when the dosage of PAC was excessive, transmembrane pressure was increased.

关 键 词：粉末活性炭 回流 氨氮 有机物 超滤 膜污染 

分 类 号：TU991.2[建筑科学—市政工程]