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dc.contributor.authorGiro, MEA-
dc.contributor.authorGarcia, O.-
dc.contributor.authorZaiat, M.-
dc.identifier.citationBiochemical Engineering Journal. Lausanne: Elsevier B.V. Sa, v. 28, n. 2, p. 201-207, 2006.-
dc.description.abstractThe biooxidation of ferrous ion into ferric ion by Acidithiobacillus ferrooxidans can be potentially used for the removal of H2S from industrial gases. In this work, Fe3+ ions were obtained through the oxidation of Fe2+ using the LR strain of At. ferrooxidans immobilized in PVC stands in a pilot-scale bioreactor, while H2S was removed in an absorption tower equipped with Rasching rings. At. ferrooxidans LR strain cells were immobilized by inoculating the bacterium in a Fe2+-mineral medium and percolating it through the support. After complete Fe2+ oxidation, which took around 90 h, the reactor was washed several times with sulfuric acid (pH 1.7) before a new cycle was started. Four additional cycles using fresh Fe2+ mineral medium were then run. During these colonization cycles, the time required for complete iron oxidation decreased, dropping to about 60 h in the last cycle. The batch experiments in the H2S gas removal trials resulted in a gas removal rate of about 98-99% under the operational conditions employed. In the continuous experiments with the bioreactor coupled to the gas absorption column, a gas removal efficiency of almost 100% was reached after 500 min. Precipitate containing mainly sulfur formed during the experimental trial was identified by EDX. (c) 2005 Elsevier B.V. All rights reserved.en
dc.publisherElsevier B.V.-
dc.sourceWeb of Science-
dc.subjectbiological oxidationpt
dc.subjectferrous sulfatept
dc.subjecthydrogen sulfidept
dc.titleImmobilized cells of Acidithiobacillus ferrooxidans in PVC strands and sultite removal in a pilot-scale bioreactoren
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUSP, Sao Carlos Sch Engn, Dept Hydraul & Sanitat, BR-13566590 Sao Carlos, SP, Brazil-
dc.description.affiliationUNESP, Inst Chem, Dept Biochem & Chem Technol, BR-14800810 Araraquara, SP, Brazil-
dc.description.affiliationUnespUNESP, Inst Chem, Dept Biochem & Chem Technol, BR-14800810 Araraquara, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofBiochemical Engineering Journal-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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