Two-stage FO-BWRO/NF treatment of saline waters

Ali Altaee, Ahmad Fauzi Ismail, Adel Sharif, Guillermo Zaragoza, Paulo Cesar Carvalho

Research output: Contribution to journalArticle

Abstract

Two-stage forward osmosis (FO)–reverse osmosis (RO)/BWRO and conventional RO/BWRO processes were evaluated for saline water treatment. Three different salts, NaCl, MgCl2 and MgSO4, were used as a draw solution. The performance of FO, RO and BWRO regeneration processes was simulated using predeveloped software. The simulation results showed that the water and solute flux across the FO membrane decreased with increasing the FO recovery rate. The highest water flux was in case of 1.2 mol NaCl draw solution for seawater desalination. The total power consumption for seawater desalination was lower in the RO process than in the FO–RO process. However, as the RO recovery rate increased, the difference in total power consumption between the conventional RO process and 0.65 mol MgCl2 FO–RO processes was insignificant. In case of brackish water desalination, the lowest specific power consumption and permeate TDS were in case of the conventional BWRO process and then followed by 0.32 mol MgSO4, 0.22 mol MgCl2 and 0.33 mol NaCl FO-BWRO processes. However, the specific power consumption of RO-BWRO process dropped to less than that in the conventional BWRO process when NF membrane was used for MgSO4 regeneration and water extraction. In general, the high recovery rate can be achieved by the FO–RO/BWRO process which is particularly important especially in case of inland desalination.

Original languageEnglish
Pages (from-to)4842-4852
Number of pages11
JournalDesalination and Water Treatment
Volume57
Issue number11
DOIs
Publication statusPublished - 2 Mar 2016

Fingerprint

Osmosis
Saline water
Reverse osmosis
osmosis
Desalination
Electric power utilization
desalination
water
Seawater
Recovery
Water
regeneration
Fluxes
membrane
seawater
Osmosis membranes
reverse osmosis
Water treatment
brackish water
solute

Keywords

  • Brackish water desalination
  • Desalination
  • Forward osmosis
  • Reverse osmosis
  • Two-stage desalination

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

Cite this

Two-stage FO-BWRO/NF treatment of saline waters. / Altaee, Ali; Ismail, Ahmad Fauzi; Sharif, Adel; Zaragoza, Guillermo; Carvalho, Paulo Cesar.

In: Desalination and Water Treatment, Vol. 57, No. 11, 02.03.2016, p. 4842-4852.

Research output: Contribution to journalArticle

Altaee, A, Ismail, AF, Sharif, A, Zaragoza, G & Carvalho, PC 2016, 'Two-stage FO-BWRO/NF treatment of saline waters', Desalination and Water Treatment, vol. 57, no. 11, pp. 4842-4852. https://doi.org/10.1080/19443994.2014.1002434
Altaee, Ali ; Ismail, Ahmad Fauzi ; Sharif, Adel ; Zaragoza, Guillermo ; Carvalho, Paulo Cesar. / Two-stage FO-BWRO/NF treatment of saline waters. In: Desalination and Water Treatment. 2016 ; Vol. 57, No. 11. pp. 4842-4852.
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