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Browsing by Author "Huddy, Robert"

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A Comparative Analysis of the Performance and the Microbial Ecology of Biological Sulphate Reducing Reactor Systems

Author: Hessler, Tomas Date: 2020 Acid rock drainage (ARD) is defined as acidic waste-water contaminated with sulphate and heavy metals which is generated through the oxidation of sulphidic ores in the presence of water and oxygen. Mining activities accelerate this process ... Read more
A novel semi-passive process for sulphate removal and elemental sulphur recovery centred on a hybrid linear flow channel reactor

Author: Marais, Tynan S Date: 2020 South Africa (SA) currently faces a major pollution problem from mining impacted water, including acid rock drainage (ARD), as a consequence of the mining activities upon which the economy has been largely built. The environmental impact of ... Read more
Characterisation of three novel α-L-arabinofuranosidases from a compost metagenome

Author: Fortune, Brent ; Mhlongo, Sizwe ; van Zyl, Leonardo J ; Huddy, Robert ; Smart, Mariette ; Trindade, Marla Date: 18 Apr 2019 Background: The importance of the accessory enzymes such as α-L-arabinofuranosidases (AFases) in synergistic interactions within cellulolytic mixtures has introduced a paradigm shift in the search for hydrolytic enzymes. The aim of this study ... Read more
Developing quantitative approaches to determine microbial colonisation and activity in mineral bioleaching and characterisation of acid rock drainage

Author: Makaula, Didi Xhanti Date: 2019 Colonisation of mineral surfaces by acidophilic microorganisms during bioleaching is important for accelerating the extraction of valuable metals from mineral sulfide ores of varying grades through biohydrometallurgy. It also influences acid ... Read more
Evaluation of the ASTERTM process in the presence of suspended solids

Author: van Zyl, Andries W ; Huddy, Robert ; Harrison, Susan T L ; van Hille, Robert P Date: 2014 The ability to recycle and reuse process water is a major contributing factor toward increased sustainability in the mining industry. However, the presence of toxic compounds has prevented this in most bioleaching operations. The ASTERTM ... Read more
Investigating process stresses on Saccharomyces cerevisiae using isothermal microcalorimetry

Author: Myers, Matthew Date: 2017 Maximising performance of microbial processes, including yeast-based processes, in an industrial setting requires understanding of the impact of process stresses. These may be the result of process configuration, dilution, temperature changes, ... Read more
Optimisation of a linear flow channel reactor for semi-passive, simultaneous biological sulphate reduction and partial sulphide oxidation

Author: Fernandes, Sarah Date: 2021 Acid rock drainage (ARD) is a growing concern, particularly in South Africa, as a country already classified as water scarce. ARD is defined as water that has been impacted by mining activities and typically has high levels of sulphate and ... Read more

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Browsing by Author "Huddy, Robert"

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