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Article: Modeling particle-size distribution dynamics in a flocculation system

TitleModeling particle-size distribution dynamics in a flocculation system
Authors
Issue Date2003
PublisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.aiche.org
Citation
Aiche Journal, 2003, v. 49 n. 7, p. 1870-1882 How to Cite?
AbstractFlocculation dynamics accounting for both particle coagulation and aggregate breakage was simulated mathematically by using modified sectional modeling techniques. The methodological improvement included the use of a continuous-size density function, instead of a characteristic size for each size section, the applications of a comprehensive curvilinear model for the coagulation kinetics, and the fractal scaling relationship for particle aggregates. Simulation results demonstrated that a flocculation system could arrive at a dynamic steady state after a period of flocculation when coagulation and breakage counterbalanced each other, resulting in a stationary size distribution with a unique peak mass concentration. Three distinct breakage distribution functions - binary, ternary, and normal distribution - did not differ considerably based on the simulation results of the steady-state size distributions. A lower shear rate, breakage rate constant, a higher collision efficiency, and initial particle concentration would result in larger aggregates in a flocculation system. The numerical simulations compared well with the results of the jar-test flocculation experiments using latex microspheres, suggesting the applicability of the curvilinear-fractal-breakage modeling system for the process simulation of the flocculation units used in water and wastewater treatment.
Persistent Identifierhttp://hdl.handle.net/10722/150238
ISSN
2015 Impact Factor: 2.98
2015 SCImago Journal Rankings: 1.122
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhang, JJen_US
dc.contributor.authorLi, XYen_US
dc.date.accessioned2012-06-26T06:02:39Z-
dc.date.available2012-06-26T06:02:39Z-
dc.date.issued2003en_US
dc.identifier.citationAiche Journal, 2003, v. 49 n. 7, p. 1870-1882en_US
dc.identifier.issn0001-1541en_US
dc.identifier.urihttp://hdl.handle.net/10722/150238-
dc.description.abstractFlocculation dynamics accounting for both particle coagulation and aggregate breakage was simulated mathematically by using modified sectional modeling techniques. The methodological improvement included the use of a continuous-size density function, instead of a characteristic size for each size section, the applications of a comprehensive curvilinear model for the coagulation kinetics, and the fractal scaling relationship for particle aggregates. Simulation results demonstrated that a flocculation system could arrive at a dynamic steady state after a period of flocculation when coagulation and breakage counterbalanced each other, resulting in a stationary size distribution with a unique peak mass concentration. Three distinct breakage distribution functions - binary, ternary, and normal distribution - did not differ considerably based on the simulation results of the steady-state size distributions. A lower shear rate, breakage rate constant, a higher collision efficiency, and initial particle concentration would result in larger aggregates in a flocculation system. The numerical simulations compared well with the results of the jar-test flocculation experiments using latex microspheres, suggesting the applicability of the curvilinear-fractal-breakage modeling system for the process simulation of the flocculation units used in water and wastewater treatment.en_US
dc.languageengen_US
dc.publisherJohn Wiley & Sons, Inc. The Journal's web site is located at http://www.aiche.orgen_US
dc.relation.ispartofAIChE Journalen_US
dc.rightsA I Ch E Journal. Copyright © John Wiley & Sons, Inc.-
dc.titleModeling particle-size distribution dynamics in a flocculation systemen_US
dc.typeArticleen_US
dc.identifier.emailLi, XY:xlia@hkucc.hku.hken_US
dc.identifier.authorityLi, XY=rp00222en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1002/aic.690490723en_US
dc.identifier.scopuseid_2-s2.0-0038486974en_US
dc.identifier.hkuros81122-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0038486974&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume49en_US
dc.identifier.issue7en_US
dc.identifier.spage1870en_US
dc.identifier.epage1882en_US
dc.identifier.isiWOS:000184163300022-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridZhang, JJ=7601341506en_US
dc.identifier.scopusauthoridLi, XY=26642887900en_US

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