Interaction of humic substances on fouling in membrane distillation for seawater desalination

Naidu, G; Jeong, S; Vigneswaran, S

Interaction of humic substances on fouling in membrane distillation for seawater desalination

Naidu, G

Jeong, S

Vigneswaran, S

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Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2015, 262 pp. 946 - 957
Issue Date:: 2015-02-05

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	CEJ humic.pdf	Published Version	1.63 MB	Adobe PDF	View/Open
	CEJ humic interaction SW MD.pdf	Published Version	1.63 MB	Adobe PDF	View/Open

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Field	Value	Language
dc.contributor.author	Naidu, G https://orcid.org/0000-0002-6406-3444	en_US
dc.contributor.author	Jeong, S https://orcid.org/0000-0001-8995-3497	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.date.issued	2015-02-05	en_US
dc.identifier.citation	Chemical Engineering Journal, 2015, 262 pp. 946 - 957	en_US
dc.identifier.issn	1385-8947	en_US
dc.identifier.uri	http://hdl.handle.net/10453/33045
dc.description.abstract	© 2014 Elsevier B.V. The interaction of humic substances on organic and biofouling during the treatment of seawater using direct contact membrane distillation (DCMD) was studied. Organic fouling was investigated at different feed temperatures in terms of distillate flux pattern and detailed organic characterization using liquid chromatography-organic carbon detection. The penetration of organics through the membrane pores was observed with SEM cross-section analysis. Also, chemical cleaning analysis showed seawater organic fouling was irreversible in DCMD. Humic substances and low molecular weight (LMW) organics are dominant organic contents in seawater. In the tested DCMD system, humic substances were thermally disaggregated to LMW-humic organics. This phenomenon was more significant in the presence of salt (NaCl), while inorganic scalant (CaSO4) reduced the disaggregation of humic substances due to the binding effect. In this study, the assimilable organic carbon (AOC) test was used to estimate the biological fouling potential during the MD process. AOC concentration is closely associated with biofilm growth in water and on the membrane (biofouling). The AOC concentration increased as the concentration of LMW-humic organics increased. This indicated the possibility of biofouling increasing in the feed and on the membrane in the MD process.	en_US
dc.relation.ispartof	Chemical Engineering Journal	en_US
dc.relation.isbasedon	10.1016/j.cej.2014.10.060	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Interaction of humic substances on fouling in membrane distillation for seawater desalination	en_US
dc.type	Journal Article
utslib.citation.volume	262	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0907 Environmental Engineering	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	closed_access
pubs.publication-status	Published	en_US
pubs.volume	262	en_US

Abstract:

© 2014 Elsevier B.V. The interaction of humic substances on organic and biofouling during the treatment of seawater using direct contact membrane distillation (DCMD) was studied. Organic fouling was investigated at different feed temperatures in terms of distillate flux pattern and detailed organic characterization using liquid chromatography-organic carbon detection. The penetration of organics through the membrane pores was observed with SEM cross-section analysis. Also, chemical cleaning analysis showed seawater organic fouling was irreversible in DCMD. Humic substances and low molecular weight (LMW) organics are dominant organic contents in seawater. In the tested DCMD system, humic substances were thermally disaggregated to LMW-humic organics. This phenomenon was more significant in the presence of salt (NaCl), while inorganic scalant (CaSO4) reduced the disaggregation of humic substances due to the binding effect. In this study, the assimilable organic carbon (AOC) test was used to estimate the biological fouling potential during the MD process. AOC concentration is closely associated with biofilm growth in water and on the membrane (biofouling). The AOC concentration increased as the concentration of LMW-humic organics increased. This indicated the possibility of biofouling increasing in the feed and on the membrane in the MD process.

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http://hdl.handle.net/10453/33045