Effect of partial flocculation and adsorption as pretreatment to ultrafiltration

Shon, HK; Vigneswaran, S; Ngo, HH

Effect of partial flocculation and adsorption as pretreatment to ultrafiltration

Shon, HK

Vigneswaran, S

Ngo, HH

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Publication Type:: Journal Article
Citation:: AIChE Journal, 2006, 52 (1), pp. 207 - 216
Issue Date:: 2006-01-01

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Field	Value	Language
dc.contributor.author	Shon, HK https://orcid.org/0000-0002-3777-7169	en_US
dc.contributor.author	Vigneswaran, S https://orcid.org/0000-0002-8117-4322	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.date.issued	2006-01-01	en_US
dc.identifier.citation	AIChE Journal, 2006, 52 (1), pp. 207 - 216	en_US
dc.identifier.issn	0001-1541	en_US
dc.identifier.uri	http://hdl.handle.net/10453/4275
dc.description.abstract	In this study, the sufficiency of flocculation and adsorption with reduced doses of ferric chloride and powdered activated carbon (PAC) as pretreatment to ultrafiltration (UF) was investigated. A 50 mg/L dose of FeCl3 and 0.5 g/L of PAC removed a majority of organic matter (OM; 88%), thus reducing the organic loading on UF that was used as posttreatment. Although flocculation with lower doses of FeCl3 (10 mg/L) followed by PAC adsorption of 0.5 g/L and UF removed the same amount of organics (∼88% OM), the majority of the OM removal was by the posttreatment of UF rather than by pretreatment, resulting in a significant decline of flux in UF. A detailed relative molecular mass (RMM) distribution analysis was made with flocculation, adsorption, and UF permeates. PAC adsorption decreased the majority of the relative intensity of smaller RMM of OM from the preflocculated water. Flocculation with <40 mg/L FeCl3 was not sufficient to remove the relative intensity of the large RMM even after a postadsorption. The detailed analysis on weight-averaged RMM (Mw) indicated that the Mw values of OM in the wastewater and in the flocculated effluent were 29,800 daltons (initial), >25,000 (after flocculation with <40 mg/L FeCl3), and <1000 (after flocculation with ≥50 mg/L FeCl3). © 2005 American Institute of Chemical Engineers.	en_US
dc.relation.ispartof	AIChE Journal	en_US
dc.relation.isbasedon	10.1002/aic.10597	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Effect of partial flocculation and adsorption as pretreatment to ultrafiltration	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	52	en_US
utslib.for	090407 Process Control and Simulation	en_US
utslib.for	090404 Membrane and Separation Technologies	en_US
utslib.for	090409 Wastewater Treatment Processes	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0914 Resources Engineering and Extractive Metallurgy	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.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	52	en_US

Abstract:

In this study, the sufficiency of flocculation and adsorption with reduced doses of ferric chloride and powdered activated carbon (PAC) as pretreatment to ultrafiltration (UF) was investigated. A 50 mg/L dose of FeCl3 and 0.5 g/L of PAC removed a majority of organic matter (OM; 88%), thus reducing the organic loading on UF that was used as posttreatment. Although flocculation with lower doses of FeCl3 (10 mg/L) followed by PAC adsorption of 0.5 g/L and UF removed the same amount of organics (∼88% OM), the majority of the OM removal was by the posttreatment of UF rather than by pretreatment, resulting in a significant decline of flux in UF. A detailed relative molecular mass (RMM) distribution analysis was made with flocculation, adsorption, and UF permeates. PAC adsorption decreased the majority of the relative intensity of smaller RMM of OM from the preflocculated water. Flocculation with <40 mg/L FeCl3 was not sufficient to remove the relative intensity of the large RMM even after a postadsorption. The detailed analysis on weight-averaged RMM (Mw) indicated that the Mw values of OM in the wastewater and in the flocculated effluent were 29,800 daltons (initial), >25,000 (after flocculation with <40 mg/L FeCl3), and <1000 (after flocculation with ≥50 mg/L FeCl3). © 2005 American Institute of Chemical Engineers.

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http://hdl.handle.net/10453/4275