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Effect of anaerobic digestion and initial pH on metal bioleaching from sewage sludge

dc.contributor.authorVillar, L. D.
dc.contributor.authorGarcia, O.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:21:44Z
dc.date.available2014-05-20T15:21:44Z
dc.date.issued2006-02-01
dc.description.abstractThe effects of anaerobic digestion and initial pH on the bioleaching of metals from sewage sludge were investigated in shake flask experiments. A strain of Acidithiobacillus thiooxidans was employed in the assays using secondary and anaerobic sludges, which resulted in similar solubilization yields of the metals chromium, copper, lead, nickel, and zinc for both the sludges investigated. The effect of initial pH (7.0 and 4.0) on metal bioleaching was assayed by using the anaerobic sludge inoculated with indigenous sulfur-oxidizing thiobacilli. Although the time required to reach the end of the experiment (final pH close to 1.0) was shortened at initial pH of 4.0, final metal solubilization was not significantly different for both initial pH values, resulting in higher solubilization yields for copper, nickel, and zinc (higher than 80%). Chromium and lead presented solubilization yields close to 50%. The results obtained in this work showed that the metal bioleaching process can be applied to sewage sludge regardless of the type of sludge and without the requirement of pH adjustment.en
dc.description.affiliationUNESP, Dept Bioquim & Tecnol Quim, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, Dept Bioquim & Tecnol Quim, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.format.extent211-222
dc.identifierhttp://dx.doi.org/10.1080/10934520500354516
dc.identifier.citationJournal of Environmental Science and Health Part A-toxic/hazardous Substances & Environmental Engineering. Philadelphia: Taylor & Francis Inc., v. 41, n. 2, p. 211-222, 2006.
dc.identifier.doi10.1080/10934520500354516
dc.identifier.issn1093-4529
dc.identifier.urihttp://hdl.handle.net/11449/32857
dc.identifier.wosWOS:000234815900009
dc.language.isoeng
dc.publisherTaylor & Francis Inc
dc.relation.ispartofJournal of Environmental Science and Health Part A-toxic/hazardous Substances & Environmental Engineering
dc.relation.ispartofjcr1.561
dc.relation.ispartofsjr0,508
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectbacterial leachingpt
dc.subjectmetalspt
dc.subjectsewage sludgept
dc.subjectsulfurpt
dc.subjectThiobacilluspt
dc.titleEffect of anaerobic digestion and initial pH on metal bioleaching from sewage sludgeen
dc.typeArtigopt
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderTaylor & Francis Inc
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentBioquímica e Tecnologia - IQpt

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