Evaluation of draw solution effectiveness in a forward osmosis process

Sami Al-aibi, Hammed B. Mahood, Adel O. Sharif, Esat Alpay, Hannah Simcoe-Read

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This work investigates the effectiveness of sodium chloride and sucrose binary draw solutions in a forward osmosis pilot plant unit with either deionised or salt water feeds. Specifically, the effects of draw solution concentration on water flux through the membrane, the overall water recovery and the specific energy consumption of the unit are considered. For both feed types, sodium chloride draw solution exhibited a relatively high effectiveness in terms of all the measured performance indicators. Further, improvements in flux and recovery were also achievable with an increase in the sodium chloride (draw solution) concentration. In contrast, a sucrose-based draw solution led to a severe deterioration of the membrane performance that could not be effectively overcome by an increase in the draw solution concentration. This observation was attributed to the relatively large increase in the viscosity of the draw solution with increase in sucrose concentration. Interestingly, in the case of a salt water feed, an increase in the sucrose draw solution concentration led to a relatively small increase in flux and recovery, suggesting some complex but favourable interaction between the salt and sucrose due to the reverse diffusion of the salt into the draw solution.

Original languageEnglish
JournalDesalination and Water Treatment
DOIs
Publication statusAccepted/In press - 2 Jul 2015

Fingerprint

Osmosis
osmosis
Sugar (sucrose)
sucrose
Sodium chloride
sodium chloride
Saline water
salt water
Fluxes
Recovery
Salts
membrane
salt
Membranes
evaluation
Deionized water
Pilot plants
Deterioration
Water
Energy utilization

Keywords

  • Draw solution agent
  • FO
  • SEC
  • Sodium chloride
  • Sucrose

ASJC Scopus subject areas

  • Pollution
  • Water Science and Technology
  • Ocean Engineering

Cite this

Evaluation of draw solution effectiveness in a forward osmosis process. / Al-aibi, Sami; Mahood, Hammed B.; Sharif, Adel O.; Alpay, Esat; Simcoe-Read, Hannah.

In: Desalination and Water Treatment, 02.07.2015.

Research output: Contribution to journalArticle

Al-aibi, Sami ; Mahood, Hammed B. ; Sharif, Adel O. ; Alpay, Esat ; Simcoe-Read, Hannah. / Evaluation of draw solution effectiveness in a forward osmosis process. In: Desalination and Water Treatment. 2015.
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