Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation

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dc.contributor.authorMoruzzi, Rodrigo Braga [UNESP]
dc.contributor.authorGonçalves, Joice [UNESP]
dc.contributor.authorSperanza, Lais Galileu [UNESP]
dc.contributor.authorde Oliveira, André Luiz
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Federal de Uberlândia (UFU)
dc.date.accessioned2023-03-02T11:27:19Z
dc.date.available2023-03-02T11:27:19Z
dc.date.issued2022-01-01
dc.description.abstractThe velocity gradient can be controlled for aggregates formation during mechanized flocculation, so that aggregates can be subsequently removed in solid/liquid separation units, providing operational flexibility to the system. Batch assays help in finding the optimal coagulation and flocculation conditions, making possible to change gradient velocities and hydraulic detention time. Nevertheless, the secondary effects as result of inertial and differential sedimentation transport over aggregates after mechanized flocculation are not well known. Therefore, this paper aimed to present the combined effect of inertial and differential transport over aggregates, using nonintrusive image technique and particle image velocimetry (PIV). It was possible to verify that the transport of the aggregates formed after the flocculation step is due to the action of the inertial movement of the fluid and differentiated sedimentation, in a proportion that varies over time. The inertial movement is predominant in the influence of the formation of aggregates from the moment when mechanical agitation is stopped (Gf of 20 s-1) until 5.5 ± 0.5 minutes, when the aggregates are predominantly modified by differential sedimentation. Through the analysis of the aggregates, two moments of growth in their length were observed. The first occured up to the two first minutes, and the other between four and six minutes, when the transition between mechanisms is likely to happen.en
dc.description.affiliationUniversidade Estadual Paulista “Júlio de Mesquita Filho”, SP
dc.description.affiliationUniversidade Federal de Uberlândia, MG
dc.description.affiliationUnespUniversidade Estadual Paulista “Júlio de Mesquita Filho”, SP
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: 301210/2018-7
dc.format.extent723-729
dc.identifierhttp://dx.doi.org/10.1590/S1413-415220200291
dc.identifier.citationEngenharia Sanitaria e Ambiental, v. 27, n. 4, p. 723-729, 2022.
dc.identifier.doi10.1590/S1413-415220200291
dc.identifier.issn1413-4152
dc.identifier.scopus2-s2.0-85136291430
dc.identifier.urihttp://hdl.handle.net/11449/242176
dc.language.isopor
dc.relation.ispartofEngenharia Sanitaria e Ambiental
dc.sourceScopus
dc.subjectaggregate
dc.subjectflocculation
dc.subjectgradient of velocity
dc.subjectparticle image velocimetry
dc.subjectparticle size distribution
dc.titleCombined effect of inertial and differential transport on aggregates after ceased mechanized flocculationen
dc.titleInfluência da ação combinada do transporte inercial e da sedimentação diferencial nos agregados após cessada a floculação mecanizadapt
dc.typeArtigo

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Artigos - Planejamento Territorial e Geoprocessamento - IGCE