High Concentration Protein Ultrafiltration: a Comparative Fouling Assessment

3rd International Conference on Global Sustainability and Chemical Engineering

工业技术;化学工业

Lim, Y.P.^1 ; Mohammad, A.W.^2

Faculty of Chemical Engineering, Universiti Teknologi MARA, Malaysia^1

Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Malaysia^2

关键词: Concentration polarization;    Experimental conditions;    Filtration resistance;    Hydrophilic/hydrophobic;    Irreversible fouling;    Molecular weight cutoff;    Regenerated cellulose;    Resistance-in-series model;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/358/1/012056/pdf
DOI  :  10.1088/1757-899X/358/1/012056

学科分类：工业工程学

来源: IOP

【 摘 要 】

In this paper, the predominant fouling mechanism via pH manipulation in gelatin ultrafiltration (UF) at constant operating pressure was studied. Two 30 kDa molecular weight cut off (MWCO) UF membranes with different hydrophilic/hydrophobic properties were tested at solution pH near gelatin isoelectric point (IEP), pH below and above gelatin's IEP. The resistance-in-series model was used to determine quantitatively the contribution of each filtration resistance occurred during gelatin UF. The governing fouling mechanisms were investigated using classical blocking laws. The results demonstrated that concentration polarization remain as dominant fouling resistance in gelatin UF, but exceptional case was observed at pH away from gelatin's IEP, showing that combined reversible and irreversible fouling resistances contributed around 57% and 37%, respectively to the overall fouling resistances. Under all experimental condition tested, permeate flux decline was accurately predicted by all the models studied. Fouling profile was fitted well with "Standard Blocking", "Intermediate Blocking" and "Cake Filtration" model for regenerated cellulose acetate (RCA) membrane and "Cake Filtration" model for polyethersulphone (PES) membrane.