Physicochemical pretreatment of seawater: fouling reduction and membrane characterization

Shon, HK; Kim, SH; Vigneswaran, S; Ben Aim, R; Lee, S; Cho, J

Physicochemical pretreatment of seawater: fouling reduction and membrane characterization

Shon, HK

Kim, SH Vigneswaran, S

Ben Aim, R Lee, S Cho, J

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Publication Type:: Journal Article
Citation:: Desalination, 2009, 238 (1-3), pp. 10 - 21
Issue Date:: 2009-03-01

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Field	Value	Language
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Kim, SH	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.contributor.author	Ben Aim, R	en_US
dc.contributor.author	Lee, S	en_US
dc.contributor.author	Cho, J	en_US
dc.date.issued	2009-03-01	en_US
dc.identifier.citation	Desalination, 2009, 238 (1-3), pp. 10 - 21	en_US
dc.identifier.issn	0011-9164	en_US
dc.identifier.uri	http://hdl.handle.net/10453/9196
dc.description.abstract	The pretreatment of raw seawater is necessary to minimize the organic fouling of seawater reverse osmosis (SWRO) membranes. To predict the membrane fouling of the pretreated seawater, the modified fouling index (MFI) with ultrafiltration (UF) was investigated in terms of molecular weight distribution (MWD) and membrane characterization. The study was conducted with seawater drawn from Collioure, France. The concentration of total dissolved solids was 32,760 mg/L. The molecular weight (MW) of the initial seawater organic matter (SWOM) ranged from about 14160 Da to 280 Da. FeCl3 flocculation removed the majority of SWOM, while PAC adsorption could not remove the lowest MW fraction of organic matter (1110, 750 and 280 Da). The UF membranes with 30 kDa and 100 kDa MW cut-off removed the majority of of organic matter corresponding to the peaks 14,160 Da and 6560 Da in MWD. The MFI values obtained when using UF membranes of 30 kDa and 100 kDa with MF pretreatment were 19,700 s/L2 and 31,000 s/L2, respectively. The MFI values after pretreatments of FeCl3 flocculation and PAC adsorption significantly decreased to 6900 s/L2 and 6700 for 30 kDa UF and to 2300 s/L2 and 2500 s/L2 for 100 kDa UF, respectively. Some relation does exist for both membranes between the MFI-UF values and Spb values obtained during the first peiod of filtration (pore blocking). The pore blocking zone significantly decreased after flocculation and adsorption pretreatment. This suggests that the pore blocking can be used as an indicator to predict membrane propensity. The detailed membrane characterization on the clean and fouled membrane surface after MFI-UF experiments was made in terms of contact angle, zeta potential, functional group and microscopy. © 2008 Elsevier B.V. All rights reserved.	en_US
dc.relation.ispartof	Desalination	en_US
dc.relation.isbasedon	10.1016/j.desal.2008.01.030	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Physicochemical pretreatment of seawater: fouling reduction and membrane characterization	en_US
dc.type	Journal Article
utslib.citation.volume	1-3	en_US
utslib.citation.volume	238	en_US
utslib.for	090410 Water Treatment Processes	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
dc.location.activity	ISI:000263920000002	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access
pubs.issue	1-3	en_US
pubs.publication-status	Published	en_US
pubs.volume	238	en_US

Abstract:

The pretreatment of raw seawater is necessary to minimize the organic fouling of seawater reverse osmosis (SWRO) membranes. To predict the membrane fouling of the pretreated seawater, the modified fouling index (MFI) with ultrafiltration (UF) was investigated in terms of molecular weight distribution (MWD) and membrane characterization. The study was conducted with seawater drawn from Collioure, France. The concentration of total dissolved solids was 32,760 mg/L. The molecular weight (MW) of the initial seawater organic matter (SWOM) ranged from about 14160 Da to 280 Da. FeCl3 flocculation removed the majority of SWOM, while PAC adsorption could not remove the lowest MW fraction of organic matter (1110, 750 and 280 Da). The UF membranes with 30 kDa and 100 kDa MW cut-off removed the majority of of organic matter corresponding to the peaks 14,160 Da and 6560 Da in MWD. The MFI values obtained when using UF membranes of 30 kDa and 100 kDa with MF pretreatment were 19,700 s/L2 and 31,000 s/L2, respectively. The MFI values after pretreatments of FeCl3 flocculation and PAC adsorption significantly decreased to 6900 s/L2 and 6700 for 30 kDa UF and to 2300 s/L2 and 2500 s/L2 for 100 kDa UF, respectively. Some relation does exist for both membranes between the MFI-UF values and Spb values obtained during the first peiod of filtration (pore blocking). The pore blocking zone significantly decreased after flocculation and adsorption pretreatment. This suggests that the pore blocking can be used as an indicator to predict membrane propensity. The detailed membrane characterization on the clean and fouled membrane surface after MFI-UF experiments was made in terms of contact angle, zeta potential, functional group and microscopy. © 2008 Elsevier B.V. All rights reserved.

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http://hdl.handle.net/10453/9196