Membrane performance with a pulp mill effluent: relative contributions of fouling mechanisms

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DOIResolve DOI: http://doi.org/10.1016/0376-7388(96)00151-2
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TypeArticle
Journal titleJournal of Membrane Science
Volume120
Issue2
Pages273285; # of pages: 13
SubjectConcentration polarization; Fouling; Ultrafiltration; Pulp mill waste; Series resistance
AbstractSevere flux decline was observed during ultrafiltration of a pulp mill effluent. Membrane fouling was the result of varying combinations of adsorption, pore plugging and concentration polarization or gel layer formation. A wide range of membrane materials and pore sizes were evaluated, showing the relationship between the membrane material, pore size and the relative contribution of the different fouling mechanisms. Individual resistances were evaluated for adsorption, pore plugging and concentration polarization using a series resistance model. These were based on the pure water flux for (1) the new membrane, (2) after static adsorption with the mill effluent, (3) the product rate when ultrafiltering the effluent, and (4) the pure water permeability with the fouled membrane. These resistances were shown to be misleading in terms of the observed flux loss for cases with significant adsorptive fouling. Adsorptive fouling was underestimated and concentration polarization overestimated. An alternative method, which we shall call flux loss ratios, is proposed, which is based on the flux decline due to a particular mechanisms as a fraction of the overall flux decline. These new measures more accurately reflect the flux decline attributable to each fouling mechanism.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Chemical Process and Environmental Technology
Peer reviewedNo
NRC number37611
NPARC number8925790
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Record identifierde939eca-d2f2-4e7f-b963-32c20b6824de
Record created2009-04-23
Record modified2016-05-09
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