Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1008529
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dc.contributor.authorSILVA, M. L. B. dapt_BR
dc.contributor.authorSOARES, H. M.pt_BR
dc.contributor.authorFURIGO JÚNIOR, A.pt_BR
dc.contributor.authorSCHMIDELL, W.pt_BR
dc.contributor.authorCORSEIUL, H. X.pt_BR
dc.date.accessioned2015-02-12T11:11:11Zpt_BR
dc.date.available2015-02-12T11:11:11Zpt_BR
dc.date.created2015-02-12pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationApplied Biochemistry and Biotechnology, v. 174, n. 5, p. 1810-1821, 2014.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1008529pt_BR
dc.descriptionColumn experiments were utilized to investigate the effects of nitrate injection on sulfate-reducing bacteria (SRB) inhibition and microbial enhanced oil recovery (MEOR). An indigenous microbial consortium collected from the produced water of a Brazilian offshore field was used as inoculum. The presence of 150 mg/L volatile fatty acids (VFA´s) in the injection water contributed to a high biological electron acceptors demand and the establishment of anaerobic sulfate-reducing conditions. Continuous injection of nitrate (up to 25 mg/L) for 90 days did not inhibit souring. Contrariwise, in nitrogen-limiting conditions, the addition of nitrate stimulated the proliferation of ?-Proteobacteria (including SRB) and the associated sulfide concentration. Denitrification-specific nirK or nirS genes were not detected. A sharp decrease in water interfacial tension (from 20.8 to 14.5 mN/m) observed concomitantly with nitrate consumption and increased oil recovery (4.3 % v/v) demonstrated the benefits of nitrate injection on MEOR. Overall, the results support the notion that the addition of nitrate, at this particular oil reservoir, can benefit MEOR by stimulating the proliferation of fortuitous biosurfactant-producing bacteria. Higher nitrate concentrations exceeding the stoichiometric volatile fatty acid (VFA) biodegradation demands and/or the use of alternative biogenic souring control strategies may be necessary to warrant effective SRB inhibition down gradient from the injection wells.pt_BR
dc.language.isoporpt_BR
dc.rightsopenAccesspt_BR
dc.subjectNitratept_BR
dc.titleEffects of nitrate injection on microbial enhanced oil recovery and oilfield reservoir souring.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2015-02-12T11:11:11Zpt_BR
dc.subject.thesagroNitratopt_BR
dc.subject.thesagroMeio ambientept_BR
dc.subject.thesagroImpacto ambientalpt_BR
dc.subject.thesagroResíduo químicopt_BR
dc.subject.thesagroÓleopt_BR
dc.subject.thesagroBiotecnologiapt_BR
dc.subject.nalthesaurusOil fieldspt_BR
dc.subject.nalthesaurusEnvironmental impactpt_BR
dc.subject.nalthesaurusChemical residuespt_BR
dc.subject.nalthesaurusBiodegradationpt_BR
riaa.ainfo.id1008529pt_BR
riaa.ainfo.lastupdate2015-02-12pt_BR
dc.identifier.doi10.1007/s12010-014-1161-2pt_BR
dc.contributor.institutionMARCIO LUIS BUSI DA SILVA, CNPSA; HUGO MOREIRA SOARES, UFSC; AGENOR FURIGO JÚNIOR, UFSC; WILLIBALDO SCHMIDELL, UFSC; HENRY XAVIER CORSEIUL, UFSC.pt_BR
Aparece nas coleções:Artigo em periódico indexado (CNPSA)

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