Preprint Article Version 1 This version is not peer-reviewed

The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes

Version 1 : Received: 17 December 2016 / Approved: 18 December 2016 / Online: 18 December 2016 (10:04:27 CET)

A peer-reviewed article of this Preprint also exists.

Jeon, S.; Rajabzadeh, S.; Okamura, R.; Ishigami, T.; Hasegawa, S.; Kato, N.; Matsuyama, H. The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes. Water 2016, 8, 602. Jeon, S.; Rajabzadeh, S.; Okamura, R.; Ishigami, T.; Hasegawa, S.; Kato, N.; Matsuyama, H. The Effect of Membrane Material and Surface Pore Size on the Fouling Properties of Submerged Membranes. Water 2016, 8, 602.

Journal reference: Water 2016, 8, 602
DOI: 10.3390/w8120602

Abstract

We aimed to investigate the relationship between membrane material and development of membrane fouling in a membrane bioreactor (MBR) using membranes with different pore sizes and hydrophilicities. Batch filtration tests were performed using submerged single hollow fiber membrane ultrafiltration (UF) modules with different polymeric membrane materials including cellulose acetate (CA), polyethersulfone (PES), and polyvinylidene fluoride (PVDF) with activated sludge taken from a municipal wastewater treatment plant. The three UF hollow fiber membranes were prepared by a non-solvent-induced phase separation method and had similar water permeabilities and pore sizes. The results revealed that transmembrane pressure (TMP) increased more sharply for the hydrophobic PVDF membrane than for the hydrophilic CA membrane in batch filtration tests, even when membranes with similar permeabilities and pore sizes were used. PVDF hollow fiber membranes with smaller pores had greater fouling propensity than those with larger pores. In contrast, CA hollow fiber membranes showed good mitigation of membrane fouling regardless of pore size. The results obtained in this study suggest that the surface hydrophilicity and pore size of UF membranes clearly affect the fouling properties in MBR operation when using activated sludge.

Subject Areas

membrane bioreactor (MBR); membrane fouling; hollow fiber membrane; hydrophilicity; hydrophobicity; wastewater treatment

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