Membrane fouling and alternative techniques for its alleviation |
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| Affiliation: | 1. Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;2. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;3. Institute of Tianjin Seawater Desalination and Multipurpose Utilization, State Oceanic Administration, Tianjin 300192, China;4. Shandong Zhaojin Motian Co. Ltd., Zhaoyuan 265400, China |
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| Abstract: | Concentration polarisation, cake formation and pore fouling lead to a performance loss in microfiltration membranes that manifests itself as a permeate flux reduction. Causes of these phenomena are varied and depend largely on components and properties of the feed suspension. The most common causes are summarised in this article. Techniques to limit this reduction or retard fouling are overviewed, including feed pretreatment, choice of membrane material, flow manipulation, the use of high shear, gas sparging and additional force fields. |
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