Effect of membrane character and solution chemistry on microfiltration performance

2020 681 1326 11 26945 document 1326 The_effect_of_membrane_character_and_solution.pdf application/pdf 2061579 2011-09-09 10:22:54 https://vuir.vu.edu.au/2020/1/The_effect_of_membrane_character_and_solution.pdf 2020 1 application/pdf text en public

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http://eprints.org/relation/isVersionOf https://vuir.vu.edu.au/id/document/1326 http://eprints.org/relation/isVolatileVersionOf https://vuir.vu.edu.au/id/document/1326 http://eprints.org/relation/isCoversheetVersionOf https://vuir.vu.edu.au/id/document/1326 archive 292 disk0/00/00/20/20 2009-05-07 16:56:55 2024-06-21 02:45:28 2009-05-07 16:56:55 article show Gray Stephen 0000-0002-8748-2748 Ritchie C. B Bolto Brian Bolto, Brian Greenwood P Busetti Francesco Allpike B Effect of membrane character and solution chemistry on microfiltration performance pub 290000 cesare microfiltration, membranes, natural organic matter, NOM, fouling, hydrophobic and hydrophilic membranes To help understand and predict the role of natural organic matter (NOM) in the fouling of low-pressure membranes, experiments were carried out with an apparatus that incorporates automatic backwashing and long filtration runs. Three hollow fibre membranes of varying character were included in the study, and the filtration of two different surface waters was compared. The hydrophilic membrane had greater flux recovery after backwashing than the hydrophobic membranes, but the efficiency of backwashing decreased at extended filtration times. NOM concentration of these waters (7.9 and 9.1 mg/L) had little effect on the flux of the membranes at extended filtration times, as backwashing of the membrane restored the flux to similar values regardless of the NOM concentration. The solution pH also had little effect at extended filtration times. The backwashing efficiency of the hydrophilic membrane was dramatically different for the two waters, and the presence of colloid NOM alone could not explain these differences. It is proposed that colloidal NOM forms a filter cake on the surface of the membranes and that small molecular weight organics that have an adsorption peak at 220 nm but not 254 nm were responsible for “gluing” the colloids to the membrane surface. Alum coagulation improved membrane performance in all instances, and this was suggested to be because coagulation reduced the concentration of “glue” that holds the organic colloids to the membrane surface. 2008-02 published Elsevier 54859 2 2383490 dark_document 54859 correspondence.pdf application/pdf e72ff7ad6e28a157ac06796167b55500 MD5 128412 2020-07-13 03:47:32 2020 3 3 application/pdf text Correspondence en staffonly

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other public Water Research : a Journal of the International Water Association (IWA) 42 3 743-753 TRUE 0043-1354 Includes bibliographical references: pp. 13.15 FALSE 47 2-s2.0-43049165688 2023-07-02 04:02:21