Comparison of fouling indices in assessing pre-treatment for seawater reverse osmosis

Article

Chinu, Korshed, Vigneswaran, Saravanamuth, Erdei, Laszlo, Shon, Hokyong K., Kandasamy, Jaya and Ngo, H. H.. 2010. "Comparison of fouling indices in assessing pre-treatment for seawater reverse osmosis ." Desalination and Water Treatment. 18 (1-3), pp. 187-191. https://doi.org/10.5004/dwt.2010.1769
Article Title

Comparison of fouling indices in assessing pre-treatment for seawater reverse osmosis

ERA Journal ID41476
Article CategoryArticle
AuthorsChinu, Korshed (Author), Vigneswaran, Saravanamuth (Author), Erdei, Laszlo (Author), Shon, Hokyong K. (Author), Kandasamy, Jaya (Author) and Ngo, H. H. (Author)
Journal TitleDesalination and Water Treatment
Journal Citation18 (1-3), pp. 187-191
Number of Pages5
Year2010
PublisherDesalination Publications
Place of PublicationUnited States
ISSN1944-3986
1944-3994
Digital Object Identifier (DOI)https://doi.org/10.5004/dwt.2010.1769
Web Address (URL)https://www.tandfonline.com/doi/abs/10.5004/dwt.2010.1769
Abstract

In this study, different processes such as flocculation with ferric chloride (FeCl3) and deep bed filtration (sand filtration and dual media filtration) as a pre-treatment were used for seawater desalination. The performance of these pre-treatments was determined in terms of silt density index (SDI) and modified fouling index by using microfilter (MF-MFI), ultrafilter (UF-MFI), and nanofilter (NF-MFI) membrane. MFI and SDI indicated that deep bed filtration with in-line flocculation was better pre-treatment than flocculation alone as colloidal particles are removed after this pretreatment. UF-MFI and NF-MFI indicated that these pretreatment cannot remove dissolved organic matter as the fouling reduction was smaller. Detailed molecular weight distribution (MWD) of seawater organic matter was examined after different pretreatments. MWD of the initial seawater mainly ranged from 1510 Da to 130 Da. Deep bed filtration with in-line flocculation removed relatively large molecular weight of organic matter (1510-1180 Da), while the small molecular weights (less than 530 Da) were not removed.

Keywordsfouling index; pre-treatment; reverse osmosis; seawater desalination
ANZSRC Field of Research 2020400411. Water treatment processes
400499. Chemical engineering not elsewhere classified
400513. Water resources engineering
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Byline AffiliationsUniversity of Technology Sydney
Institution of OriginUniversity of Southern Queensland
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