Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.ces.2011.03.001
Title: Integrated forward osmosis-membrane distillation (FO-MD) hybrid system for the concentration of protein solutions
Authors: Wang, K.Y. 
Teoh, M.M. 
Nugroho, A.
Chung, T.-S. 
Keywords: Direct contact membrane distillation
Forward osmosis
Mathematical modeling
Membranes
Pharmaceuticals
Separations
Issue Date: 1-Jun-2011
Source: Wang, K.Y., Teoh, M.M., Nugroho, A., Chung, T.-S. (2011-06-01). Integrated forward osmosis-membrane distillation (FO-MD) hybrid system for the concentration of protein solutions. Chemical Engineering Science 66 (11) : 2421-2430. ScholarBank@NUS Repository. https://doi.org/10.1016/j.ces.2011.03.001
Abstract: For the first time, an integrated forward osmosis-membrane distillation (FO-MD) hybrid system has been demonstrated for the concentration of protein solutions, specifically a bovine serum albumin (BSA) solution. A hydrophilic polybenzimidazole (PBI) nanofiltration hollow fiber membrane and a hydrophobic polyvinylidene fluoride-polytetrafluoroethylene (PVDF-PTFE) hollow fiber membrane were fabricated and employed in the FO and MD processes, respectively. A concentrated NaCl solution was employed as the draw solute to dehydrate proteins in FO, while distillate water is a by-product during the re-concentration of diluted NaCl draw solution in MD. To determine suitable operating conditions for the hybrid system, independent characterizations were carried out for both FO and MD processes using different NaCl concentrations as draw solutes in FO and different feed temperatures in MD. It was found that the integrated system is stable in continuous operation when the dehydration rate across the FO membrane is the same as the water vapor rate across the MD membrane. Simple mathematical models consistent with the experimental results were also developed for the FO and the FO-MD hybrid systems. The newly developed FO-MD hybrid system is promising for the concentration of pharmaceuticals/protein solutions in the foreseeable future. © 2011 Elsevier Ltd.
Source Title: Chemical Engineering Science
URI: http://scholarbank.nus.edu.sg/handle/10635/89247
ISSN: 00092509
DOI: 10.1016/j.ces.2011.03.001
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