A preliminary study on the volume reduction of pre-treatment sludge in seawater desalination by forward osmosis

Liyanaarachchi, S., Jegatheesan, V., Shu, L., Muthukumaran, S. and Baskaran, K. 2014, A preliminary study on the volume reduction of pre-treatment sludge in seawater desalination by forward osmosis, Desalination and water treatment, vol. 52, no. 4-6, pp. 556-563, doi: 10.1080/19443994.2013.827299.

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Title A preliminary study on the volume reduction of pre-treatment sludge in seawater desalination by forward osmosis
Author(s) Liyanaarachchi, S.
Jegatheesan, V.
Shu, L.
Muthukumaran, S.
Baskaran, K.ORCID iD for Baskaran, K. orcid.org/0000-0002-3011-6632
Journal name Desalination and water treatment
Volume number 52
Issue number 4-6
Start page 556
End page 563
Total pages 8
Publisher Taylor & Francis
Place of publication Hopkinton, Mass.
Publication date 2014-01-28
ISSN 1944-3994
1944-3986
Keyword(s) concentration polarisation
desalination
forward osmosis
pre-treatment
sludge
Summary Forward Osmosis (FO) can be applied to recover water from the pre-treatment sludge of seawater reverse osmosis process. This study investigated the effect of the concentration of two draw solutions (MgCl2 and NaCl) in the reduction of Fe(OH)3 sludge volume and the effect of cross flow velocity on flux through FO membrane. Higher the concentration of NaCl and MgCl2 higher the water flux observed. However, the percentage increase was not significant due to the occurrence of internal concentration polarisation. MgCl2 draws marginally increased water flux than NaCl, when the conditions of feed and draw solutions were similar. Increase in cross flow velocity (from 0.25 to 1.0 m/s) marginally changed the flux with both draw solutions as higher cross flow velocities were unproductive to beat the external CP effect along the membrane surface. However, at 1 m/s, highest fluxes were obtained for both draw solutions.
Language eng
DOI 10.1080/19443994.2013.827299
Field of Research 090404 Membrane and Separation Technologies
090508 Water Quality Engineering
090407 Process Control and Simulation
Socio Economic Objective 829803 Management of Liquid Waste from Plant Production (excl. Water)
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2014, Taylor & Francis
Persistent URL http://hdl.handle.net/10536/DRO/DU:30057766

Document type: Journal Article
Collection: School of Engineering
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