Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation

Detalhes bibliográficos
Autor(a) principal: Kamiwada, Wagner Yukio [UNESP]
Data de Publicação: 2020
Outros Autores: Andrade, Priscila Vega [UNESP], Reis, Adriano Goncalves dos [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1590/S1413-4152202020180005
http://hdl.handle.net/11449/209010
Resumo: Polyaluminium chloride (PAC) is a pre-hydrolyzed inorganic polymeric coagulant that is being used widely in the treatment of water supply and wastewater by forming a hard and heavy Al(OH)(3)* precipitate, in addition to having a smaller effect on pH. The literature, however, is still scarce in correlating the chemistry and physics of the coagulant with process optimizations. The objective of this paper is to use PAC in studies of water supply treatability through coagulation, flocculation, and sedimentation. For this purpose, a mathematical modeling was initially performed to adjust turbidity and pH, and then remaining turbidity and apparent color coagulation diagrams were constructed with a pH of 4.0 to 9.0 and a dosage of 10 to 120 mg.L-1 of PAC (0.6 to 6.9 mg.L--(1) of Al3+). Different gradients of velocity and mixing times for coagulation and flocculation were also studied. The coagulation diagrams indicated satisfactory results in the pH range between 7 and 9 with a dosage higher than 30 mg.L of PAC (1.7 mg.L--(1) of Al3+), and it is related to the minimum solubility of Al(OH)(3)*. Coagulation and flocculation optimizations achieved an improvement of up to 79% in the remaining turbidity, a reduction of up to 83% in the settler area or a reduction of up to 67% in PAC dosage, due to an increase in the size of the floc produced. An in-depth knowledge of the chemistry and physics of the process related to the use of PAC can, therefore, bring benefits to its use.
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spelling Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentationcoagulation diagrampolyaluminium chloridePACprocess optimizationPolyaluminium chloride (PAC) is a pre-hydrolyzed inorganic polymeric coagulant that is being used widely in the treatment of water supply and wastewater by forming a hard and heavy Al(OH)(3)* precipitate, in addition to having a smaller effect on pH. The literature, however, is still scarce in correlating the chemistry and physics of the coagulant with process optimizations. The objective of this paper is to use PAC in studies of water supply treatability through coagulation, flocculation, and sedimentation. For this purpose, a mathematical modeling was initially performed to adjust turbidity and pH, and then remaining turbidity and apparent color coagulation diagrams were constructed with a pH of 4.0 to 9.0 and a dosage of 10 to 120 mg.L-1 of PAC (0.6 to 6.9 mg.L--(1) of Al3+). Different gradients of velocity and mixing times for coagulation and flocculation were also studied. The coagulation diagrams indicated satisfactory results in the pH range between 7 and 9 with a dosage higher than 30 mg.L of PAC (1.7 mg.L--(1) of Al3+), and it is related to the minimum solubility of Al(OH)(3)*. Coagulation and flocculation optimizations achieved an improvement of up to 79% in the remaining turbidity, a reduction of up to 83% in the settler area or a reduction of up to 67% in PAC dosage, due to an increase in the size of the floc produced. An in-depth knowledge of the chemistry and physics of the process related to the use of PAC can, therefore, bring benefits to its use.Univ Estadual Paulista, Inst Ciencia Tecnol, Sao Jose Dos Campos, SP, BrazilUniv Estadual Paulista, Inst Ciencia Tecnol, Sao Jose Dos Campos, SP, BrazilAssoc Brasileira Engenharia Sanitaria AmbientalUniversidade Estadual Paulista (Unesp)Kamiwada, Wagner Yukio [UNESP]Andrade, Priscila Vega [UNESP]Reis, Adriano Goncalves dos [UNESP]2021-06-25T11:45:50Z2021-06-25T11:45:50Z2020-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article667-676application/pdfhttp://dx.doi.org/10.1590/S1413-4152202020180005Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 25, n. 5, p. 667-676, 2020.1413-4152http://hdl.handle.net/11449/20901010.1590/S1413-4152202020180005S1413-41522020000500667WOS:000599289500003S1413-41522020000500667.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporEngenharia Sanitaria E Ambientalinfo:eu-repo/semantics/openAccess2023-10-20T06:04:32Zoai:repositorio.unesp.br:11449/209010Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:24:07.721050Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
title Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
spellingShingle Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
Kamiwada, Wagner Yukio [UNESP]
coagulation diagram
polyaluminium chloride
PAC
process optimization
title_short Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
title_full Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
title_fullStr Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
title_full_unstemmed Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
title_sort Use of polyaluminium chloride in studies of water supply treatability through coagulation, flocculation, and sedimentation
author Kamiwada, Wagner Yukio [UNESP]
author_facet Kamiwada, Wagner Yukio [UNESP]
Andrade, Priscila Vega [UNESP]
Reis, Adriano Goncalves dos [UNESP]
author_role author
author2 Andrade, Priscila Vega [UNESP]
Reis, Adriano Goncalves dos [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Kamiwada, Wagner Yukio [UNESP]
Andrade, Priscila Vega [UNESP]
Reis, Adriano Goncalves dos [UNESP]
dc.subject.por.fl_str_mv coagulation diagram
polyaluminium chloride
PAC
process optimization
topic coagulation diagram
polyaluminium chloride
PAC
process optimization
description Polyaluminium chloride (PAC) is a pre-hydrolyzed inorganic polymeric coagulant that is being used widely in the treatment of water supply and wastewater by forming a hard and heavy Al(OH)(3)* precipitate, in addition to having a smaller effect on pH. The literature, however, is still scarce in correlating the chemistry and physics of the coagulant with process optimizations. The objective of this paper is to use PAC in studies of water supply treatability through coagulation, flocculation, and sedimentation. For this purpose, a mathematical modeling was initially performed to adjust turbidity and pH, and then remaining turbidity and apparent color coagulation diagrams were constructed with a pH of 4.0 to 9.0 and a dosage of 10 to 120 mg.L-1 of PAC (0.6 to 6.9 mg.L--(1) of Al3+). Different gradients of velocity and mixing times for coagulation and flocculation were also studied. The coagulation diagrams indicated satisfactory results in the pH range between 7 and 9 with a dosage higher than 30 mg.L of PAC (1.7 mg.L--(1) of Al3+), and it is related to the minimum solubility of Al(OH)(3)*. Coagulation and flocculation optimizations achieved an improvement of up to 79% in the remaining turbidity, a reduction of up to 83% in the settler area or a reduction of up to 67% in PAC dosage, due to an increase in the size of the floc produced. An in-depth knowledge of the chemistry and physics of the process related to the use of PAC can, therefore, bring benefits to its use.
publishDate 2020
dc.date.none.fl_str_mv 2020-09-01
2021-06-25T11:45:50Z
2021-06-25T11:45:50Z
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/S1413-4152202020180005
Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 25, n. 5, p. 667-676, 2020.
1413-4152
http://hdl.handle.net/11449/209010
10.1590/S1413-4152202020180005
S1413-41522020000500667
WOS:000599289500003
S1413-41522020000500667.pdf
url http://dx.doi.org/10.1590/S1413-4152202020180005
http://hdl.handle.net/11449/209010
identifier_str_mv Engenharia Sanitaria E Ambiental. Rio De Janeiro: Assoc Brasileira Engenharia Sanitaria Ambiental, v. 25, n. 5, p. 667-676, 2020.
1413-4152
10.1590/S1413-4152202020180005
S1413-41522020000500667
WOS:000599289500003
S1413-41522020000500667.pdf
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 667-676
application/pdf
dc.publisher.none.fl_str_mv Assoc Brasileira Engenharia Sanitaria Ambiental
publisher.none.fl_str_mv Assoc Brasileira Engenharia Sanitaria Ambiental
dc.source.none.fl_str_mv Web of Science
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
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