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Analysis of the influence of module construction upon forward osmosis performance

Field, R.; Siddiqui, F.; Ang, P.; Wu, J.J.

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Authors

R. Field

F. Siddiqui

P. Ang



Abstract

The potential of a commercial forward osmosis (FO) module to recover water from NEWater brine, an RO retentate, was assessed by taking an innovative approach to obtaining the mass transfer coefficients. The performance comparison of the spiral wound (S-W) FO module with that of the flat sheet laboratory unit suggests that the winding involved in S-W construction can adversely affect performance; the values for the S-W mass transfer coefficients were half of those expected. This first-of-its-kind performance comparison utilised coupons of the membrane and spacers taken from the module. The module was used both in the conventional manner for FO and in the reverse manner with the active layer facing the draw solution. Estimates of membrane parameters and mass transfer coefficients experiments for the two orientations were obtained using pure water, 10 mM and 25 mM NaCl solution on the feed side and 1 M NaCl as draw solution. The fouling potential of NEWater brine per se was found to be low. These are the first results with a S-W module that suggest potential for this niche application; nevertheless the level of the water flux through the S-W module clearly indicates that industrial applications of S-W FO will be constrained to special cases.

Citation

Field, R., Siddiqui, F., Ang, P., & Wu, J. (2018). Analysis of the influence of module construction upon forward osmosis performance. Desalination, 431, 151-156. https://doi.org/10.1016/j.desal.2017.09.003

Journal Article Type Article
Acceptance Date Sep 6, 2017
Online Publication Date Sep 18, 2017
Publication Date Apr 1, 2018
Deposit Date Oct 18, 2017
Publicly Available Date Mar 28, 2024
Journal Desalination
Print ISSN 0011-9164
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 431
Pages 151-156
DOI https://doi.org/10.1016/j.desal.2017.09.003

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