An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus

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dc.contributor.advisorHarrison, STLen_ZA
dc.contributor.authorSissing, Ashley Aen_ZA
dc.date.accessioned2015-09-15T10:20:51Z
dc.date.available2015-09-15T10:20:51Z
dc.date.issued2002en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractGold-bearing refractory sulphidic ores require a pretreatment process before extraction of the valuable metal, may be carried out. Bioleaching of the mineral may be used as pretreatment. Further mineral bioleaching may be used to liberate base metals such as copper from refractory sulphidic ores. The microorganisms used in the high intensity tank-based commercial biohydrometallurgy processes are mainly mesophiles, although moderate thermophiles are currently used at Youanmi Mine in Australia (Brierley, 1997). Extreme thermophiles have been found to exhibit enhanced oxidation kinetics in terms of rate of reaction and extent of solubilisation (Duarte et al, 1993; Norris and Barr, 1988; Konishi et al., 1995). However, these thermophiles appear to be sensitive to hydrodynamic conditions (Clark and Norris, 1996) and the presence of solids (Le Roux and Wakerley, 1988; Nemati and Harrison, 2000). An understanding of this sensitivity would be useful in developing systems to utilise extreme thermophiles in commercial biohydrometallurgy processes. The main objective of this study was to determine the effect of the solid particulate phase on the bioleaching performance of the extreme thermophile Sulfolobus metallicus. The hypothesis of the thesis was as follows: Archae involved in bioleaching are susceptible to damage in agitated aerated vessels, especially with increasing pulp density.en_ZA
dc.identifier.apacitationSissing, A. A. (2002). <i>An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/13958en_ZA
dc.identifier.chicagocitationSissing, Ashley A. <i>"An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2002. http://hdl.handle.net/11427/13958en_ZA
dc.identifier.citationSissing, A. 2002. An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus. University of Cape Town.en_ZA
dc.identifier.risTY - Thesis / Dissertation AU - Sissing, Ashley A AB - Gold-bearing refractory sulphidic ores require a pretreatment process before extraction of the valuable metal, may be carried out. Bioleaching of the mineral may be used as pretreatment. Further mineral bioleaching may be used to liberate base metals such as copper from refractory sulphidic ores. The microorganisms used in the high intensity tank-based commercial biohydrometallurgy processes are mainly mesophiles, although moderate thermophiles are currently used at Youanmi Mine in Australia (Brierley, 1997). Extreme thermophiles have been found to exhibit enhanced oxidation kinetics in terms of rate of reaction and extent of solubilisation (Duarte et al, 1993; Norris and Barr, 1988; Konishi et al., 1995). However, these thermophiles appear to be sensitive to hydrodynamic conditions (Clark and Norris, 1996) and the presence of solids (Le Roux and Wakerley, 1988; Nemati and Harrison, 2000). An understanding of this sensitivity would be useful in developing systems to utilise extreme thermophiles in commercial biohydrometallurgy processes. The main objective of this study was to determine the effect of the solid particulate phase on the bioleaching performance of the extreme thermophile Sulfolobus metallicus. The hypothesis of the thesis was as follows: Archae involved in bioleaching are susceptible to damage in agitated aerated vessels, especially with increasing pulp density. DA - 2002 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2002 T1 - An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus TI - An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus UR - http://hdl.handle.net/11427/13958 ER -en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/13958
dc.identifier.vancouvercitationSissing AA. An investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicus. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2002 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/13958en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Bioprocess Engineering Researchen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBioprocess Engineeringen_ZA
dc.titleAn investigation into the effect of solid particulate phase on the bioleaching performance of Sulfolobus metallicusen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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