超滤膜处理东江水的阈通量和极限通量对比研究
作者:孙国胜 ,刘帅2,武睿1,鄢忠森3,瞿芳术3,梁恒3,李圭白3
单位: 1. 广东粤海水务股份有限公司,深圳518021,2. 东莞常平粤海水务有限公司,东莞523570;3. 哈尔滨工业大学市政环境工程学院,哈尔滨150090
关键词: 超滤膜;阈通量;极限通量
出版年,卷(期):页码: 2016,36(6):126-132

摘要:
 超滤膜通量的选取直接关系到超滤系统的运行稳定性和基建费用,是超滤系统设计最为重要的参数。随着膜技术的发展和膜产品价格的降低,低通量将在水处理领域获得更多的应用。然而,现有的低通量体系中各种通量概念繁多,尚无明确适用于饮用水超滤工艺的低通量概念。本论文结合地表水体的原水和混凝-沉淀后水开展了超滤膜阈通量和极限通量的测定,并在两个通量下进行了运行对比研究。实验结果表明:原水及沉后水在极限通量5.0 L/m2h下运行,膜污染得到有效控制,极限通量能够在死端过滤的模式下实现长期稳定运行。
 Membrane flux determines both running stability and capital investment of a water treatment engineering using ultrafiltration. Hence, design flux is one of the most important parameters for an ultrafiltration system. On a basis of membrane technology developments and membrane cost decreasing, lower fluxes can gradually become acceptable in drinking water treatment field. However, although there are various low flux concepts used for membrane fouling control, a clear definition of low flux for ultrafiltration membranes has not been properly developed yet. In this work, the filtration tests of surface water and coagulation-sedimentation effluent were performed under both threshold and limiting fluxes. Both water purification performance and fouling developments were compared. The results indicated that the stable filtration of the tested water samples could be obtained only under the limiting flux (5.0 L/m2h). Hence, the limiting flux could be regarded as a possible resolution for membrane fouling control and stable operation of a ultrafiltration system.

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