超滤+纳滤系统深度净化低温低浊期梁子湖水中试  

Deep Purification Effect of Ultrafiltration+Nanofiltration Double Membrane System on Low Temperature and Low Turbidity Surface Water

作　　者：田若 钟燕敏 黄嘉奕 陈可延 刘志远 TIAN Ruo;ZHONG Yan-min;HUANG Jia-yi;CHEN Ke-yan;LIU Zhi-yuan(Wuhan Water Group Co.Ltd.,Wuhan 430000,China;Shanghai Municipal Engineering Design InstituteCo.Ltd.,Shanghai 200092,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉市水务集团有限公司,湖北武汉430000 [2]上海市政工程设计研究总院<集团>有限公司,上海200092 [3]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《中国给水排水》2023年第17期32-37,共6页China Water & Wastewater

摘　　要：针对冬季地表水出现低温低浊的情况,开展了超滤+纳滤双膜系统处理武汉市梁子湖湖水的深度净化中试。结果表明:武汉虽处于我国中部地区,但冬季地表水仍存在低温低浊现象,常规混凝/沉淀/过滤工艺出水浊度等可以达到新国标要求,但UV_(254)、总溶解性固体(TDS)等含量仍较高。经过双膜法深度处理后,出水浊度可达到0.1 NTU左右,UV_(254)达到0.010 cm^(-1)以下,TDS在50 mg/L左右。冬季低温对双膜系统的净化效果影响不大。低温期由于原水水质较好,超滤膜可以保持长期稳定运行。由于超滤膜的前处理效果较好,进一步延长了纳滤膜的使用时间。纳滤膜在研究时段内没有进行清洗的情况下,仍能保持较高的膜通量,跨膜压差上升较慢。In view of the situation of low temperature and low turbidity of surface water in winter,the ultrafiltration+nanofiltration double membrane system was used in the pilot study to deeply purify the raw water of Liangzihu Lake in Wuhan.The research results showed that although Wuhan is located in the middle of China,the phenomenon of low temperature and low turbidity still exists in the surface water in winter,and the turbidity of the water produced by conventional coagulation,precipitation and filtration process could meet the requirements of the new national standard.However,the contents of UV_(254) and TDS were still high.After the double membrane deep purification treatment,the effluent turbidity could reach about 0.1 NTU,UV_(254) was less than 0.010 cm^(-1),and TDS was about 50 mg/L.Low temperature in winter had little effect on the water purification effect on double membrane system.The UF membrane could keep stable operation for a long time due to the good quality of raw water in low temperature.Because of the good pre-treatment effect of UF membrane,the service time of NF membrane was further extended.In the study period,NF membrane was not washed,but still maintained high membrane flux,and the rise of transmembrane pressure was very slow.

关 键 词：超滤 纳滤 低温低浊水 中试 

分 类 号：TU991[建筑科学—市政工程]