[1]张增荣,陈可延,钟燕敏,等.双膜系统对夏季湖水净化中试研究[J].中国给水排水,2024,40(11):49-56.
　ZHANGZeng-rong,CHENKe-yan,ZHONGYan-min,et al.Pilot-scale Dual Membrane System for High Temperature Lake Water Purification in Summer[J].China Water & Wastewater,2024,40(11):49-56.
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双膜系统对夏季湖水净化中试研究

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第40卷 期数: 2024年第11期 页码: 49-56 栏目: 出版日期: 2024-06-01
Title:
Pilot-scale Dual Membrane System for High Temperature Lake Water Purification in Summer
作者:
张增荣1， 陈可延2， 钟燕敏3， 刘志远3， 马永恒3， 张民盛3， 刘博3， 邹春3， 薛英文2
（1.上海水业设计工程有限公司，上海 200092；2.武汉大学 土木建筑工程学院，湖北 武汉 430072；3.上海市政工程设计研究总院<集团>有限公司，上海 200092）
Author(s):
ZHANG　Zeng-rong1， CHEN　Ke-yan2， ZHONG　Yan-min3， LIU　Zhi-yuan3， MA　Yong-heng3， ZHANG　Min-sheng3， LIU　Bo3， ZOU　Chun3， XUE　Ying-wen2
（1. Shanghai Water Design & Engineering Co. Ltd.， Shanghai 200092， China； 2. School of Civil Engineering， Wuhan University， Wuhan 430072， China； 3. Shanghai Municipal Engineering Design Institute Co. Ltd.， Shanghai 200092， China）
关键词:
双膜系统;  夏季湖水;  超滤膜;  纳滤膜;  膜污染
Keywords:
dual membrane system;  lake water in summer;  ultrafiltration membrane;  nanofiltration membrane;  membrane fouling
摘要:
夏季湖水水温高、有机污染物较多，采用常规水处理工艺效果有限，为满足越来越严格的水质标准要求，在武汉市某水厂建立了规模为100 m3/d的双膜（超滤膜+纳滤膜）系统。中试系统进水为该水厂沉淀池或砂滤池出水，分别采用浸没式超滤膜+纳滤膜工艺和压力式超滤膜+纳滤膜工艺，对比不同双膜系统对水质深度净化的效果。结果表明，双膜系统可以有效去除水中的悬浮物和有机物，针对两种中试进水，纳滤膜可将出水浊度控制在0.10 NTU左右，将UV254控制在0.005 cm-1以下，对TDS的去除率在20%~30%左右。当进水为沉后水时，在最优方案中，纳滤膜可将出水CODMn降至0.50 mg/L以下。相较于直接采用超滤膜，臭氧-活性炭预处理工艺+超滤膜处理可以有效降低有机物浓度，缓解纳滤膜污染。混凝+沉淀+臭氧-活性炭预处理+浸没式超滤+纳滤处理工艺对夏季湖水的净化效果更加稳定有效。
Abstract:
In summer, the performance of conventional water treatment process is poor, because the water temperature of the lake is high and there are many organic pollutants. A dual membrane (ultrafiltration and nanofiltration) system with a treatment scale of 100 m3/d was constructed in a waterworks in Wuhan to cope with the increasingly strict water quality requirements. The influent of the pilot system was the effluent from the sedimentation tank or the sand filter of the waterworks. The performances of the submerged ultrafiltration-nanofiltration process and the pressurized ultrafiltration-nanofiltration process for advanced treatment of water were compared. The dual membrane system effectively removed suspended solids and organic matters from the water. For influent quality of the two pilot systems, the nanofiltration decreased the turbidity in the effluent to approximately 0.10 NTU and the UV254 to less than 0.005 cm-1, and could achieve the TDS removal rate of around 20% to 30%. When the influent was from the sedimentation tank, nanofiltration membrane could reduce effluent CODMn to below 0.50 mg/L in the optimal scheme. Compared with individual ultrafiltration, the combined process consisting of ozone-activated carbon pretreatment and ultrafiltration effectively reduced the organic matter concentration and mitigated the fouling of nanofiltration membrane. The combined process consisting of coagulation, precipitation, ozone-activated carbon pretreatment, submerged ultrafiltration and nanofiltration was more stable and effective for the treatment of lake water in summer.
更新日期/Last Update: 2024-06-01