A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system

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dc.contributor.authorGovender, Elaine
dc.contributor.authorBryan, Chris
dc.contributor.authorHarrison, Sue
dc.date.accessioned2017-06-08T14:22:49Z
dc.date.available2017-06-08T14:22:49Z
dc.date.issued2015-03
dc.description.abstractHeap bioleaching systems are complex, with multiple sub-processes interacting at various scales within the heterogeneous reaction environment. This provides a challenge to determining the growth characteristics of micro-organisms and reaction characteristics of the mineral ore in a representative environment. The experimental system presented in this paper was designed to simulate heap bioleaching conditions using multiple, identically constructed agglomerate-scale mini-column reactors. Ore samples were prepared representatively as grab samples of a larger heap. Particle size distributions and agglomerate masses of the prepared ore samples were shown to be similar within acceptable variance and provided comparable surface areas for microbial colonisation and chemical reaction. The microbial abundance within the whole ore system was determined from effluent sampling for the planktonic population and the systematic and sequential sacrifice of identically operated mini-column reactors to determine the change in the ore-associated microbial population with time. Microbial colonisation and growth rate kinetics were determined from analysis of these populations. The growth curves obtained for the bulk flowing solution and ore-associated populations at the base case operating conditions were reproducible, within a 95 % confidence interval.en_ZA
dc.identifier.apacitationGovender, E., Bryan, C., & Harrison, S. (2015). A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system. <i>Biochemical Engineering Journal</i>, http://hdl.handle.net/11427/24557en_ZA
dc.identifier.chicagocitationGovender, Elaine, Chris Bryan, and Sue Harrison "A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system." <i>Biochemical Engineering Journal</i> (2015) http://hdl.handle.net/11427/24557en_ZA
dc.identifier.citationGovender E., Bryan C.G., Harrison S.T.L. 2015. A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system. Biochemical Engineering Journal, Volume 95, Pages 86–97en_ZA
dc.identifier.issn1369-703Xen_ZA
dc.identifier.ris TY - Journal Article AU - Govender, Elaine AU - Bryan, Chris AU - Harrison, Sue AB - Heap bioleaching systems are complex, with multiple sub-processes interacting at various scales within the heterogeneous reaction environment. This provides a challenge to determining the growth characteristics of micro-organisms and reaction characteristics of the mineral ore in a representative environment. The experimental system presented in this paper was designed to simulate heap bioleaching conditions using multiple, identically constructed agglomerate-scale mini-column reactors. Ore samples were prepared representatively as grab samples of a larger heap. Particle size distributions and agglomerate masses of the prepared ore samples were shown to be similar within acceptable variance and provided comparable surface areas for microbial colonisation and chemical reaction. The microbial abundance within the whole ore system was determined from effluent sampling for the planktonic population and the systematic and sequential sacrifice of identically operated mini-column reactors to determine the change in the ore-associated microbial population with time. Microbial colonisation and growth rate kinetics were determined from analysis of these populations. The growth curves obtained for the bulk flowing solution and ore-associated populations at the base case operating conditions were reproducible, within a 95 % confidence interval. DA - 2015-03 DB - OpenUCT DP - University of Cape Town J1 - Biochemical Engineering Journal LK - https://open.uct.ac.za PB - University of Cape Town PY - 2015 SM - 1369-703X T1 - A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system TI - A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system UR - http://hdl.handle.net/11427/24557 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/24557
dc.identifier.vancouvercitationGovender E, Bryan C, Harrison S. A novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching system. Biochemical Engineering Journal. 2015; http://hdl.handle.net/11427/24557.en_ZA
dc.languageengen_ZA
dc.publisherElsevieren_ZA
dc.publisher.departmentCentre for Bioprocess Engineering Research
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.rightsAttribution-NonCommercial-NoDerivs (CC BY-NC-ND 4.0)*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en_ZA
dc.sourceBiochemical Engineering Journalen_ZA
dc.source.urihttps://www.journals.elsevier.com/biochemical-engineering-journal/
dc.titleA novel experimental system for the study of microbial ecology and mineral leaching within a simulated agglomerate-scale heap bioleaching systemen_ZA
dc.typeJournal Articleen_ZA
uct.subject.keywordsHeap Bioleachingen_ZA
uct.subject.keywordsPacked Bed Reactorsen_ZA
uct.subject.keywordsHeterogeneous Reactionen_ZA
uct.subject.keywordsMicrobial Growthen_ZA
uct.subject.keywordsImmobilised Cellsen_ZA
uct.type.filetypeImage
uct.type.filetypeInteractive Resource
uct.type.publicationResearchen_ZA
uct.type.resourceArticleen_ZA
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