title: Membrane fouling mechanism in ultrafiltration of succinic acid fermentation broth.
abstract: The membrane fouling mechanism was studied in treating succinic acid fermentation broth during dead-end ultrafiltration. Different membranes were used and two models were applied to analyze the fouling mechanism. Resistance-in-series model was applied to determine the main factor that caused the operation resistance. Results indicated that most membranes tended to be fouled by cake layer or concentration polarization. Hermia's model, which is composed of four individual sub-models, was used to analyze the predominant fouling mechanism. Results showed that the fouling of RC 10 kDa and PES 30 kDa was controlled by the complete blocking mechanism, while PES 100 kDa was controlled by the intermediate blocking and PES 10 kDa was controlled by cake layer. This conclusion was also proved by SEM photos. Membrane characteristics were monitored before and after ultrafiltration by AFM and goniometer. Both contact angle and roughness of most membranes increased after ultrafiltration.
authors.affiliation: National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
authors.forename: Caixia
authors.initials: C
authors.lastname: Wang
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.forename: Huang
authors.initials: H
authors.lastname: Tang
authors.forename: Daojiang
authors.initials: D
authors.lastname: Yan
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Jianmin
authors.initials: J
authors.lastname: Xing
authors.forename: Yinhua
authors.initials: Y
authors.lastname: Wan
mesh_terms: D057219:Biofouling; D003470:Culture Media / Q000494:pharmacology*; D005285:Fermentation / Q000187:drug effects*; D008567:Membranes, Artificial; D008962:Models, Theoretical; D010539:Permeability / Q000187:drug effects; D019802:Succinic Acid / Q000378:metabolism*; D014462:Ultrafiltration / Q000379:methods*
chemical_list: D003470:Culture Media; D008567:Membranes, Artificial; D019802:Succinic Acid