Treatment of sugarcane vinasse by combination of coagulation/flocculation and Fenton's oxidation

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dc.contributor.authorGuerreiro, Lígia F.
dc.contributor.authorRodrigues, Carmen S.D.
dc.contributor.authorDuda, Rose M.
dc.contributor.authorde Oliveira, Roberto A. [UNESP]
dc.contributor.authorBoaventura, Rui A.R.
dc.contributor.authorMadeira, Luis M.
dc.contributor.institutionUniversidade do Porto
dc.contributor.institution“Nilo Stéfani”
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:04:01Z
dc.date.available2018-12-11T17:04:01Z
dc.date.issued2016-10-01
dc.description.abstractThe efficiency of individual and integrated processes applied to organic matter reduction and biodegradability improvement of a biodigested sugarcane vinasse wastewater was assessed. Strategies considered were Fenton's oxidation (Strategy 1), coagulation/flocculation (Strategy 2) and the combination of both processes (coagulation/flocculation followed by Fenton's reaction) – Strategy 3. It was found that Fenton's oxidation per se allowed reducing the organic matter, increasing the wastewater biodegradability and a non-toxic effluent was generated; however the cost of treatment was very high (86.6 R$/m3 – 21.2 €/m3). Under optimized conditions, coagulation/flocculation provided a slight increase in effluent's biodegradability, toxicity towards Vibrio fischeri was also eliminated and moderate removals of total organic carbon – TOC – (30.5%), biological oxygen demand – BOD5 – (27.9%) and chemical oxygen demand – COD – (43.6%) were achieved; however, the operating costs are much smaller. The use of dissolved iron resulting from coagulation/flocculation (270 mg/L) as catalyst in the second stage – Fenton's oxidation – was shown to be an innovative and economically attractive strategy. Under optimal conditions overall removals of 51.6% for TOC, 45.7% for BOD5 and 69.2% for COD were achieved, and a biodegradable (BOD5:COD ratio = 0.54) and non-toxic effluent was obtained. In order to increase the efficiency of the process but using less hydrogen peroxide, the Fenton's oxidation was performed by gradually adding the oxidant. This procedure allowed to obtain the highest organic matter removal efficiency (as compared with the addition of all hydrogen peroxide at the beginning of the reaction). This way it was possible to minimize the reagent consumption and, consequently, reduce the treatment cost.en
dc.description.affiliationLEPABE – Laboratório de Engenharia de Processos Ambiente Biotecnologia e Energia Departamento de Engenharia Química Faculdade de Engenharia Universidade do Porto, R. Dr. Roberto Frias
dc.description.affiliationFaculdade de Tecnologia de Jaboticabal “Nilo Stéfani”, Av. Eduardo Zambianchi, 31, Vila Industrial
dc.description.affiliationLaboratório de Saneamento Ambiental Departamento de Engenharia Rural Faculdade de Ciências Agrárias e Veterinárias UNESP Universidade Estadual Paulista, Av. Prof. Paulo Donato Castallene, km 5
dc.description.affiliationLSRE – Laboratório de Processos de Separação e Reação Laboratório Associado LSRE/LCM Departamento de Engenharia Química Faculdade de Engenharia Universidade do Porto, R. Dr. Roberto Frias
dc.description.affiliationUnespLaboratório de Saneamento Ambiental Departamento de Engenharia Rural Faculdade de Ciências Agrárias e Veterinárias UNESP Universidade Estadual Paulista, Av. Prof. Paulo Donato Castallene, km 5
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCNPq: 483118/2011-7
dc.description.sponsorshipIdCAPES: PNPD-3137/2010
dc.format.extent237-248
dc.identifierhttp://dx.doi.org/10.1016/j.jenvman.2016.06.027
dc.identifier.citationJournal of Environmental Management, v. 181, p. 237-248.
dc.identifier.doi10.1016/j.jenvman.2016.06.027
dc.identifier.file2-s2.0-84977571989.pdf
dc.identifier.issn1095-8630
dc.identifier.issn0301-4797
dc.identifier.scopus2-s2.0-84977571989
dc.identifier.urihttp://hdl.handle.net/11449/173184
dc.language.isoeng
dc.relation.ispartofJournal of Environmental Management
dc.relation.ispartofsjr1,161
dc.relation.ispartofsjr1,161
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAnaerobic effluent biodegradability
dc.subjectCoagulation/flocculation
dc.subjectEconomic analysis
dc.subjectFenton's reaction
dc.subjectSugarcane vinasse
dc.subjectToxicity
dc.titleTreatment of sugarcane vinasse by combination of coagulation/flocculation and Fenton's oxidationen
dc.typeArtigo
unesp.author.orcid0000-0002-1893-5467[6]

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