A unified model for flux prediction during batch cell ultrafiltration

An analysis of the flux decline encountered during ultrafiltration (UF) in a batch cell is presented by including the combined influence of the osmotic pressure and the gel layer. A predictive model for the flux decline in unstirred and stirred batch cell UF processes is developed by unifying the os...

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Bibliographic Details
Published inJournal of membrane science Vol. 111; no. 2; pp. 243 - 258
Main Authors Bhattacharjee, S., Sharma, Ashutosh, Bhattacharya, P.K.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 20.03.1996
Elsevier
Subjects
Applied sciences
Batch cell
Chemical engineering
Exact sciences and technology
Flux prediction
Membrane separation (reverse osmosis, dialysis...)
Ultrafiltration
Flux prediction
Ultrafiltration
Batch cell
Polymeric membranes
Theoretical study
Serum albumin
Experimental study
Modeling
Mass transfer
Ethylene oxide polymer
Proteins
Membrane separation
Polyvinylalcohol
Batchwise
Cellulose acetate
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Summary:An analysis of the flux decline encountered during ultrafiltration (UF) in a batch cell is presented by including the combined influence of the osmotic pressure and the gel layer. A predictive model for the flux decline in unstirred and stirred batch cell UF processes is developed by unifying the osmotic pressure and gel layer models. UF experiments were performed in a batch cell with polymeric solutes (PEG, dextran and PVA) and a protein (BSA), ranging widely in molecular weights and physico-chemical properties, under various operating conditions (pressure, solution pH, and stirrer speed). The present unified model predictions match closely with the experimental flux behaviour for all cases, while individual osmotic pressure and gel layer models are found to be inadequate.
ISSN:0376-7388
1873-3123
DOI:10.1016/0376-7388(95)00255-3