Please use this identifier to cite or link to this item: https://doi.org/10.5004/dwt.2010.1733
Title: A novel hybrid forward osmosis - nanofiltration (FO-NF) process for seawater desalination: Draw solution selection and system configuration
Authors: Tan, C.H.
Ng, H.Y. 
Keywords: Forward osmosis
Nanofiltration
Seawater desalination
Issue Date: Jan-2010
Source: Tan, C.H., Ng, H.Y. (2010-01). A novel hybrid forward osmosis - nanofiltration (FO-NF) process for seawater desalination: Draw solution selection and system configuration. Desalination and Water Treatment 13 (1-3) : 356-361. ScholarBank@NUS Repository. https://doi.org/10.5004/dwt.2010.1733
Abstract: A hybrid forward osmosis-nanofiltration (FO-NF) process for seawater desalination is proposed in this study. Seven potential draw solutions for the FO-NF process were investigated using laboratory-scale forward osmosis (FO) and nanofiltration (NF) test cells. Results from both FO and NF tests suggested that the hybrid FO-NF process is a feasible process for seawater desalination. Water fluxes of about 10 L/m2 h, for both FO and NF processes could be achieved. Solute rejection of the FO membrane was maintained at over 99.4% for all seven draw solutes tested. Solute rejection of the NF membrane for the four selected draw solutions could achieve a maximum of 97.9%. A hybrid FO-NF process with two-pass NF regeneration is proposed to achieve good quality product water that meets the recommended drinking water total dissolved solids (TDS) guideline, of 500 mg/L from the World Health Organisation. It is possible to desalinate seawater with this system configuration to obtain product water with TDS of 113.6 mg/L. Finally, MgSO4 and Na2SO4 are proposed as the most likely draw solution for the hybrid process. © 2010 Desalination Publications.
Source Title: Desalination and Water Treatment
URI: http://scholarbank.nus.edu.sg/handle/10635/87449
ISSN: 19443994
DOI: 10.5004/dwt.2010.1733
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