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dc.contributor.authorCanto, C.S.A.
dc.contributor.authorCestari, A.I.
dc.contributor.authorRatusznei, Suzana Maria
dc.contributor.authorRodrigues, José Alberto Domingues
dc.contributor.authorZaiat, Marcelo
dc.contributor.authorForesti, E.
dc.date.accessioned2024-10-11T16:31:58Z
dc.date.available2024-10-11T16:31:58Z
dc.date.issued2013
dc.identifier.citationHandb. of Wastewater Treat.: Biological Methods, Technol. and Environ. Impact
dc.identifier.isbn978-162257591-6
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84896439436&partnerID=40&md5=ce56bee3a27ff3250aca0b796005539c
dc.identifier.urihttps://repositorio.maua.br/handle/MAUA/956
dc.description.abstractThe objective of this work was to assess the biotransformation of sulfate into elemental sulfur in a sequencing batch biofilm reactor (SBBR) with recirculation of the liquid phase and containing immobilized biomass on polyurethane foam. The reactor was inoculated with anaerobic biomass from an upward-flow anaerobic sludge blanket (UASB) reactor and treated 2.0 L synthetic wastewater in 8-h cycles. Two feed strategies at temperatures of 30 and 15oC were assessed: (a) batch and (b) batch followed by fedbatch. In strategy (a) the reactor was fed in 10 minutes with 2 L wastewater containing sulfate and carbon sources. In strategy (b) 1.2 L wastewater containing only the sulfate source was fed during the first 10 minutes of the cycle and the remaining 0.8 L (containing only the carbon source) in 240 minutes. Two microaeration strategies were assessed for the oxidation of sulfate to elemental sulfur: a) forced aeration, by bubbling air into the liquid medium, and (b) natural aeration, by natural oxygenation of the liquid phase during recirculation between the reactor and the side reservoir. Based on the volume fed and on the concentrations of organic matter (1.5 and 11.25 gCOD/L) and sulfate (0.5 and 2.5 gSO4 2-/L), the sulfate and organic matter loading rates applied were 1.5 and 4.5 gSO4 2-/L.d and 4.5 and 13.5 gCOD/L.d. Sulfate reduction efficiencies exceeding 90% were obtained, regardless of feed strategy and temperature used. Higher organic matter removal efficiencies were obtained when reactor feeding was gradual (strategy b) at 1.5 gCOD/L/0.5 gSO4 2-/L. In this case efficiency increased from 57.4 to 71.8%, when the reactor was operated at 15 °C. At the same COD/SO4 2-ratio the efficiency of sulfate oxidation to elemental sulfur was almost 100%. © 2013 Nova Science Publishers, Inc.en
dc.languageInglêspt_BR
dc.publisherNova Science Publishers, Inc.en
dc.relation.ispartofHandbook of Wastewater Treatment: Biological Methods, Technology and Environmental Impact
dc.rightsAcesso Restrito
dc.sourceScopusen
dc.subjectAnSBBRen
dc.subjectBatchen
dc.subjectFed-batchen
dc.subjectMicroaerationen
dc.subjectSulfur removalen
dc.subjectTemperatureen
dc.titleBiotransformation of sulfate in elemental sulfur in SBBR: Effects of feed strategy, temperature and microaerationen
dc.typeCapítulo de Livropt_BR
dc.description.affiliationDepartamento de Engenharia Química e de Alimentos, Escola de Engenharia Mauá, Instituto Mauá de Tecnologia (IMT), São Caetano do Sul-SP, Brazilpt_BR
dc.description.affiliationDepartamento de Hidráulica e Saneamento, Escola de Engenharia de São Carlos, Universidade de São Paulo (USP), São Carlos-SP, Brazilpt_BR
dc.identifier.scopus2-s2.0-84896439436pt_BR
dc.citation.epage195.0
dc.citation.spage167.0


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