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Title: Performance limitation of the full-scale reverse osmosis process
Authors: Song, L. 
Hu, J.Y. 
Ong, S.L. 
Ng, W.J. 
Elimelech, M.
Wilf, M.
Keywords: Full-scale RO
Mass transfer
Process performance
Reverse osmosis
Thermodynamic restriction
Issue Date: 1-Apr-2003
Citation: Song, L., Hu, J.Y., Ong, S.L., Ng, W.J., Elimelech, M., Wilf, M. (2003-04-01). Performance limitation of the full-scale reverse osmosis process. Journal of Membrane Science 214 (2) : 239-244. ScholarBank@NUS Repository.
Abstract: The mechanisms controlling the performance of a full-scale reverse osmosis (RO) process (typically a pressure vessel holding six 1m long modules in series) under various operating conditions are carefully examined in this study. We demonstrate that thermodynamic equilibrium imposes a strong restriction on the performance of a full-scale RO process under certain circumstances. This thermodynamic restriction arises from the significant increase in osmotic pressure downstream of an RO membrane channel (owing to the phenomenon of salt accumulation within the RO channel as a result of permeate production). The behavior of the full-scale RO process under thermodynamic restriction is much different from that of the process when it is controlled by mass transfer. The conditions for an RO process to shift from mass transfer-controlled regime to thermodynamically restricted regime are delineated and discussed. © 2002 Elsevier Science B.V. All rights reserved.
Source Title: Journal of Membrane Science
ISSN: 03767388
DOI: 10.1016/S0376-7388(02)00551-3
Appears in Collections:Staff Publications

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