High flux and antifouling filtration membrane based on non-woven fabric with chitosan coating for membrane bioreactors

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• 作者：Chanchan Wang ; Fenglin Yang ; Fangang Meng ; Hanmin Zhang ; Yuan Xue ; Gang Fu
• 关键词：Non-woven fabric ; Chitosan (CS) ; Coating ; Submerged membrane bioreactor (SMBR) ; Antifouling properties
• 刊名：Bioresource Technology
• 出版年：2010
• 出版时间：July 2010
• 年：2010
• 卷：101
• 期：14
• 页码：5469-5474
• 全文大小：299 K

文摘

To prepare a high flux and antifouling filtration membrane used for submerged membrane bioreactors, non-woven fabric (NWF) was modified by coating chitosan (CS) on both internal and outer surface. Chemical structural and morphological changes were characterized. The changes of surface free energy were monitored by dynamic contact angle, which showed an increase after modification. The CS/NWF composite membranes were found to be with high flux, high effluent quality and excellent antifouling property. The results of fouling resistance distribution indicated that irreversible fouling resistance was decreased by coating CS. Especially, there were fewer gel layers existing on the outer surface. The adsorption of EPS on the NWF membrane internal surface decreased after being coated with CS. Modification improved filtration performance, and made fouling less troublesome and membrane regeneration efficient.