Journal
DESALINATION
Volume 387, Issue -, Pages 61-74Publisher
ELSEVIER
DOI: 10.1016/j.desal.2016.03.006
Keywords
Permeability; Osmosis; Reverse osmosis; Rejection rate; Solution-diffusion
Categories
Funding
- Conseil Regional Provence-Alpes-Cote d'Azur
- Ecole Centrale de Marseille
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A novel experimental method and its associated model are proposed for the simultaneous determination of membrane solute and solvent permeabilities, which are essential transport parameters of reverse osmosis models used for process simulation. The method utilizes a single bench-scale batch apparatus consisting of two stirred half-cells containing solutions of different concentrations separated by a membrane across which coupled non-steady-state solute diffusion and solvent osmosis take place countercurrently in the absence of transmembrane pressure difference. Results are presented from days-long determinations of the water and sodium chloride permeabilities of Filmtec BW30 and NF270 membrane samples for initial transmembrane salt concentration differences ranging from 1 g L-1 to 35 g L-1. When used as input parameters for the simulation of pilot reverse osmosis desalination tests, the osmotic-diffusive salt permeabilities approximated the experimental rejection rates. (C) 2016 Elsevier B.V. All rights reserved.
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