Encyclopedia of Membranes

2016 Edition
| Editors: Enrico Drioli, Lidietta Giorno

UF Modeling (Ultrafiltration Modeling)

Reference work entry
DOI: https://doi.org/10.1007/978-3-662-44324-8_1208
Basic membrane process configurations include single-pass, batch, fed-batch, and continuous operation (Fig. 1). Single-pass operation involves a single pass of feed through the module feed channel where it exists as sufficiently concentrated retentate. This requires a long residence time in the modules using long feed channels and/or low feed flow rates. Component concentrations change along the length of the retentate channel. Analysis starts with the steady-state component and solvent mass balances as shown in the Table 1. These consider an incremental area element, d A, in the axial or flow direction for a feed channel, module, or membrane assembly of constant width. Constant density is also assumed. Combining the balance equations and integrating yields a relation between concentrations, volume reduction, and solute passage. The area required for processing is obtained by integrating the solvent balance. The Cheryan flux approximation \( \overline{J} =...
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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.EMD Millipore CorporationPlaya del ReyUSA