High flux and antifouling filtration membrane based on non-woven fabric with chitosan coating for membrane bioreactors.
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.
Wang
Chanchan
C
Key Laboratory of Industrial Ecology and Environmental Engineering of Ministry of Education, School of Environmental and Biological Science and Technology, No 2 Linggong Road, Dalian University of Technology, Dalian 116023, PR China.
Yang
Fenglin
F
Meng
Fangang
F
Zhang
Hanmin
H
Xue
Yuan
Y
Fu
Gang
G
D000327:Adsorption; D000818:Animals; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods; D002417:Cattle; D048271:Chitosan / Q000737:chemistry*; D005374:Filtration; D008567:Membranes, Artificial; D010539:Permeability; D011108:Polymers / Q000737:chemistry; D011506:Proteins / Q000737:chemistry; D013499:Surface Properties
D008567:Membranes, Artificial; D011108:Polymers; D011506:Proteins; D048271:Chitosan