High recovery rate NF-FO-RO hybrid system for inland brackish water treatment

Ali Altaee, Nidal Hilal

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Brackish water desalination is a common method for fresh water supply in arid areas. Concentrated brine is the major waste stream generated from the desalination process. The current study proposes a multi-stage Nanofiltration (NF)-Forward Osmosis (FO)-Brackish Water Reverse Osmosis (BWRO) system to increase the recovery rate of brackish water. The simulation results showed that the NF-FO-BWRO system was able to achieve >. 90% recovery rate for a number of feed salinities varied from 1 to 2.4. g/L. High permeability NF membrane was used in the first stage to produce the first permeate flow at relatively low power consumption. Concentrated brine from the NF was fed to an FO membrane for power for additional fresh water extraction before disposal. 0.25-0.5. M NaCl was used as the draw solution in the FO membrane. The results showed that system recovery rate increased with increasing the concentration of the draw solution. NF process was responsible of 75% of the total recovery rate while BWRO process contribution was up to 20%. Almost 80% of the total power consumption for desalination was due to the BWRO process. NF and FO processes accounted for the rest 20% power consumption. The BWRO system also required 2 to 3 times more membranes than FO and NF processes. NF-FO-BWRO is flexible and can generate different proportions of permeate flows through controlling the recovery rates of each component.

Original languageEnglish
Pages (from-to)19-25
Number of pages7
JournalDesalination
Volume363
DOIs
Publication statusPublished - 1 May 2015
Externally publishedYes

Fingerprint

Nanofiltration
Osmosis
Hybrid systems
Water treatment
osmosis
brackish water
water treatment
Reverse osmosis
Recovery
Water
Desalination
membrane
Osmosis membranes
Electric power utilization
desalination
brine
Nanofiltration membranes
Saline Waters
rate
Water supply

Keywords

  • Brackish water desalination
  • Forward Osmosis
  • High recovery desalination
  • Inland desalination
  • Reverse osmosis

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanical Engineering
  • Chemistry(all)
  • Materials Science(all)
  • Water Science and Technology

Cite this

High recovery rate NF-FO-RO hybrid system for inland brackish water treatment. / Altaee, Ali; Hilal, Nidal.

In: Desalination, Vol. 363, 01.05.2015, p. 19-25.

Research output: Contribution to journalArticle

Altaee, Ali ; Hilal, Nidal. / High recovery rate NF-FO-RO hybrid system for inland brackish water treatment. In: Desalination. 2015 ; Vol. 363. pp. 19-25.
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