Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process

Detalhes bibliográficos
Autor(a) principal: Javier Rivas, F.
Data de Publicação: 2004
Outros Autores: Beltrán, F., Carvalho, F., Acedo, B., Gimeno, O.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/20.500.12207/5607
Resumo: The combined sedimentation-chemical oxidation treatment of medium-stabilized landfill leachates has been investigated. The sequence of stages implemented was: (a) coagulation–flocculation by pH decrease (pH 2) to acidic conditions (COD removal ≈ 25% related to COD0 ≈ 7500 ppm); (b) coagulation–flocculation by Fe(III) addition (0.01 M) at pH 3.5 (COD removal ≈ 40% related to COD of supernatant after step (a); (c) Fenton (Fe(III) = 0.01 M; H2O2 = 1.0 M) oxidation (COD removal ≈ 80% related to COD of supernatant after step (a); and (d) coagulation–flocculation of Fenton’s effluent at pH 3.5 (COD removal ≈ 90% related to COD of supernatant after step (a). The use of Kynch theory allows for the design of clarifiers based on the amount of solids fed. For a general example of 1000 m3 day−1 of a feeding stream, clarifier area values of 286, 111 and 231 m2 were calculated for compacting indices of 3.7, 2.67 and 2.83 corresponding to the first, second and third consecutive sedimentation processes, respectively, (steps (a), (b) and (d)).
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spelling Stabilized leachates: sequential coagulation–flocculation + chemical oxidation processLeachateLandfillCoagulation–flocculationSedimentationFentonThe combined sedimentation-chemical oxidation treatment of medium-stabilized landfill leachates has been investigated. The sequence of stages implemented was: (a) coagulation–flocculation by pH decrease (pH 2) to acidic conditions (COD removal ≈ 25% related to COD0 ≈ 7500 ppm); (b) coagulation–flocculation by Fe(III) addition (0.01 M) at pH 3.5 (COD removal ≈ 40% related to COD of supernatant after step (a); (c) Fenton (Fe(III) = 0.01 M; H2O2 = 1.0 M) oxidation (COD removal ≈ 80% related to COD of supernatant after step (a); and (d) coagulation–flocculation of Fenton’s effluent at pH 3.5 (COD removal ≈ 90% related to COD of supernatant after step (a). The use of Kynch theory allows for the design of clarifiers based on the amount of solids fed. For a general example of 1000 m3 day−1 of a feeding stream, clarifier area values of 286, 111 and 231 m2 were calculated for compacting indices of 3.7, 2.67 and 2.83 corresponding to the first, second and third consecutive sedimentation processes, respectively, (steps (a), (b) and (d)).Elsevier2022-10-10T11:13:49Z2004-07-27T00:00:00Z2004-07-27T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.12207/5607eng1873-3336https://doi.org/10.1016/j.jhazmat.2004.07.022Javier Rivas, F.Beltrán, F.Carvalho, F.Acedo, B.Gimeno, O.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-10-13T07:45:15Zoai:repositorio.ipbeja.pt:20.500.12207/5607Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:11:26.129053Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
title Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
spellingShingle Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
Javier Rivas, F.
Leachate
Landfill
Coagulation–flocculation
Sedimentation
Fenton
title_short Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
title_full Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
title_fullStr Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
title_full_unstemmed Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
title_sort Stabilized leachates: sequential coagulation–flocculation + chemical oxidation process
author Javier Rivas, F.
author_facet Javier Rivas, F.
Beltrán, F.
Carvalho, F.
Acedo, B.
Gimeno, O.
author_role author
author2 Beltrán, F.
Carvalho, F.
Acedo, B.
Gimeno, O.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Javier Rivas, F.
Beltrán, F.
Carvalho, F.
Acedo, B.
Gimeno, O.
dc.subject.por.fl_str_mv Leachate
Landfill
Coagulation–flocculation
Sedimentation
Fenton
topic Leachate
Landfill
Coagulation–flocculation
Sedimentation
Fenton
description The combined sedimentation-chemical oxidation treatment of medium-stabilized landfill leachates has been investigated. The sequence of stages implemented was: (a) coagulation–flocculation by pH decrease (pH 2) to acidic conditions (COD removal ≈ 25% related to COD0 ≈ 7500 ppm); (b) coagulation–flocculation by Fe(III) addition (0.01 M) at pH 3.5 (COD removal ≈ 40% related to COD of supernatant after step (a); (c) Fenton (Fe(III) = 0.01 M; H2O2 = 1.0 M) oxidation (COD removal ≈ 80% related to COD of supernatant after step (a); and (d) coagulation–flocculation of Fenton’s effluent at pH 3.5 (COD removal ≈ 90% related to COD of supernatant after step (a). The use of Kynch theory allows for the design of clarifiers based on the amount of solids fed. For a general example of 1000 m3 day−1 of a feeding stream, clarifier area values of 286, 111 and 231 m2 were calculated for compacting indices of 3.7, 2.67 and 2.83 corresponding to the first, second and third consecutive sedimentation processes, respectively, (steps (a), (b) and (d)).
publishDate 2004
dc.date.none.fl_str_mv 2004-07-27T00:00:00Z
2004-07-27T00:00:00Z
2022-10-10T11:13:49Z
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dc.identifier.uri.fl_str_mv https://hdl.handle.net/20.500.12207/5607
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 1873-3336
https://doi.org/10.1016/j.jhazmat.2004.07.022
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dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
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