Factors that affect the permeability of commercial hollow-fibre membranes in a submerged anaerobic MBR (HF-SAnMBR) system

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• 作者：A. Robles^a ; ^{ngerobma@upv.es} ; M.V. Ruano^b ; ^{m.victoria.ruano@uv.es} ; J. Ribes^b ; ^{josep.ribes@uv.es} ; J. Ferrer^a ; ^{jferrer@hma.upv.es}
• 关键词：Back-flush frequency ; Biogas sparging ; Commercial hollow-fibre membranes ; Submerged anaerobic membrane bioreactor ; Membrane permeability
• 刊名：Water Research
• 出版年：2013
• 出版时间：1 March, 2013
• 年：2013
• 卷：47
• 期：3
• 页码：1277-1288
• 全文大小：1041 K

文摘

A demonstration plant with two commercial HF ultrafiltration membrane modules (PURON^?, Koch Membrane Systems, PUR-PSH31) was operated with urban wastewater. The effect of the main operating variables on membrane performance at sub-critical and supra-critical filtration conditions was tested. The physical operating variables that affected membrane performance most were gas sparging intensity and back-flush (BF) frequency. Indeed, low gas sparging intensities (around 0.23?Nm³?h^?1?m^?2) and low BF frequencies (30-s back-flush for every 10 basic filtration-relaxation cycles) were enough to enable membranes to be operated sub-critically even when levels of mixed liquor total solids were high (up to 25?g?L^?1). On the other hand, significant gas sparging intensities and BF frequencies were required in order to maintain long-term operating at supra-critical filtration conditions. After operating for more than two years at sub-critical conditions (transmembrane flux between 9 and 13.3 LMH at gas sparging intensities of around 0.23?Nm³?h^?1?m^?2 and MLTS levels from around 10-30?g?L^?1) no significant irreversible/irrecoverable fouling problems were detected (membrane permeability remained above 100 LMH bar^?1 and total filtration resistance remained below 10¹³?m^?1), therefore no chemical cleaning was conducted. Membrane performance was similar to the aerobic HF membranes operated in full-scale MBR plants.