Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1413-415220200291 http://hdl.handle.net/11449/242176 |
Resumo: | The 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. |
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Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculationInfluência da ação combinada do transporte inercial e da sedimentação diferencial nos agregados após cessada a floculação mecanizadaaggregateflocculationgradient of velocityparticle image velocimetryparticle size distributionThe 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.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Universidade Estadual Paulista “Júlio de Mesquita Filho”, SPUniversidade Federal de Uberlândia, MGUniversidade Estadual Paulista “Júlio de Mesquita Filho”, SPCNPq: 301210/2018-7Universidade Estadual Paulista (UNESP)Universidade Federal de Uberlândia (UFU)Moruzzi, Rodrigo Braga [UNESP]Gonçalves, Joice [UNESP]Speranza, Lais Galileu [UNESP]de Oliveira, André Luiz2023-03-02T11:27:19Z2023-03-02T11:27:19Z2022-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article723-729http://dx.doi.org/10.1590/S1413-415220200291Engenharia Sanitaria e Ambiental, v. 27, n. 4, p. 723-729, 2022.1413-4152http://hdl.handle.net/11449/24217610.1590/S1413-4152202002912-s2.0-85136291430Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporEngenharia Sanitaria e Ambientalinfo:eu-repo/semantics/openAccess2023-03-02T11:27:20Zoai:repositorio.unesp.br:11449/242176Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:39:57.265772Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation Influência da ação combinada do transporte inercial e da sedimentação diferencial nos agregados após cessada a floculação mecanizada |
title |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation |
spellingShingle |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation Moruzzi, Rodrigo Braga [UNESP] aggregate flocculation gradient of velocity particle image velocimetry particle size distribution |
title_short |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation |
title_full |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation |
title_fullStr |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation |
title_full_unstemmed |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation |
title_sort |
Combined effect of inertial and differential transport on aggregates after ceased mechanized flocculation |
author |
Moruzzi, Rodrigo Braga [UNESP] |
author_facet |
Moruzzi, Rodrigo Braga [UNESP] Gonçalves, Joice [UNESP] Speranza, Lais Galileu [UNESP] de Oliveira, André Luiz |
author_role |
author |
author2 |
Gonçalves, Joice [UNESP] Speranza, Lais Galileu [UNESP] de Oliveira, André Luiz |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Federal de Uberlândia (UFU) |
dc.contributor.author.fl_str_mv |
Moruzzi, Rodrigo Braga [UNESP] Gonçalves, Joice [UNESP] Speranza, Lais Galileu [UNESP] de Oliveira, André Luiz |
dc.subject.por.fl_str_mv |
aggregate flocculation gradient of velocity particle image velocimetry particle size distribution |
topic |
aggregate flocculation gradient of velocity particle image velocimetry particle size distribution |
description |
The 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. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 2023-03-02T11:27:19Z 2023-03-02T11:27:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1413-415220200291 Engenharia Sanitaria e Ambiental, v. 27, n. 4, p. 723-729, 2022. 1413-4152 http://hdl.handle.net/11449/242176 10.1590/S1413-415220200291 2-s2.0-85136291430 |
url |
http://dx.doi.org/10.1590/S1413-415220200291 http://hdl.handle.net/11449/242176 |
identifier_str_mv |
Engenharia Sanitaria e Ambiental, v. 27, n. 4, p. 723-729, 2022. 1413-4152 10.1590/S1413-415220200291 2-s2.0-85136291430 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Engenharia Sanitaria e Ambiental |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
723-729 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128547699556352 |