• Microbial fuel cells : the effect of granular activated carbon and graphite as growth substrates on bioelectrogenesis by Geobacter sulfurreducens 

  Van Heerden, Xandra (University of Pretoria, 2019-12)

  There is an increasing demand for environmentally sustainable alternative energy sources as the supply of fossil fuels dwindles and the concern about our carbon footprint continues to increase. Bioelectrogenesis is a process ...
• The effect of pH control on ammonium release in anaerobic digestion 

  Gonde, Lonestar (University of Pretoria, 2023)

  Anaerobic digestion is a process whereby microorganisms break down waste material into simpler compounds, while simultaneously producing biogas that is generally high in methane and carbon dioxide content (60 –70 % and 30 ...
• Combustion performance of self-assembly ternary pyrotechnic time-delay compositions 

  Guo, Shasha (University of Pretoria, 2022-12)

  Pyrotechnic compositions are usually employed in time delay detonators to facilitate controlled initiation of explosive charges in mining and quarrying operations. Traditional fast and slow-burning formulations are ...
• Adapting an existing batch pulp digester model for use in continuous digesters 

  de Bruin, Johannes Daniël (University of Pretoria, 2020)

  A mathematical model of a continuous Kraft wood digester was developed and tested. The model relies heavily on the work done previously by Christensen, Albright & Williams (1982). The batch Kraft digester model developed ...
• Optimizing Growth Conditions of Azolla pinnata R Brown for Phytoremediation 

  da Silva, Maria Emelia Jesus (University of Pretoria, 2023)

  Poor agricultural practices involving synthetic fertilizers have caused many environmental issues which leads to the pollution of all biospheres of the earth. In order to meet the ever-increasing demand of fertilizer it ...
• Microbial precipitation of Pb(II) with wild strains of Klebsiella Pneumoniae and Paraclostridium Bifermentans isolated from an industrially obtained microbial consortium 

  Neveling, Olga (University of Pretoria, 2022)

  The study focused on determining the microbial precipitation abilities of two bacterial strains, Paraclostridium bifermentans and Klebsiella pneumoniae isolated from an industrially obtained microbial consortium. Previous ...
• In situ bioremediation of hexavalent chromium by permeable reactive barrier using wastewater sludge bacteria 

  Kholisa, Buyisile (University of Pretoria, 2022)

  Environmental pollution is a global problem that affects both developed and developing countries by contaminating soil and water, threatening biodiversity, ecosystems, and human health. South Africa holds the largest chrome ...
• Rhizopus oryzae for fumaric acid production : continuous feed strategies to manipulate the metabolism 

  Swart, Reuben Marc (University of Pretoria, 2022)

  The four-carbon dicarboxylic acid, fumaric acid, of the tricarboxylic acid cycle remains a promising bio-based platform chemical. To date the most promising organism for pro- ducing fumaric acid is Rhizopus oryzae (ATCC ...
• Chromium (VI) reduction in a microbial fuel cell using biogenic palladium nanoparticles and model development 

  Matsena, Mpumelelo Thomas (University of Pretoria, 2022)

  Microbial fuel cell (MFC) architectural modification is increasingly becoming an important area of research due to the need to improve energy recovery. In this study, we present a simple low-cost modification method of the ...
• Korrosie van vergasserkonstruksiemateriale in kontak met etanol-petrol-brandstofmengsels 

  Viljoen, Hendrik Jacobus (University of Pretoria, 1981)

  Afrikaans: Dit is bekend dat aluminiumallooie wat meer as 4,5% koper bevat korrosieprobleme ondervind wanneer dit in kontak met enkelfasige petrol-alkoholmengsels is, mits die tempe= rature hoer as 60°c is. Hierdie ...
• Optimisation of the synthesis of Mg-AI-CO3 LDH and the partial substitution of Mg/Ca-based LDHS 

  Venter, H.P. (University of Pretoria, 2014)

  A green synthesis method for the synthesis of hydrotalcite has been previously developed but this process has not yet been optimised. The main focus of this dissertation was on aluminium-based LDHs. The purpose of this ...
• Efficacy of Calcined Layered Double Hydroxide Clays in the Remediation of Phenol from Wastewater 

  Tabana, Lehlogonolo Shane (University of Pretoria, 2021)

  The discharge of poorly treated wastewater containing persistent organic contaminants, such as phenol, into water bodies is a major contributor to water pollution. This is of great concern as it poses health threats to ...
• Dextrin nanocomposites and deep eutectic solvents as matrices for solid dosage forms 

  Phillips, Justin (University of Pretoria, 2020)

  Controlled-release formulations for pesticide applications act as depot systems that continuously release the active ingredients into the environment over a speci ed period, usually from months to years. However, some ...
• Synthesis of novel low-molecularweight polytetrafluoroethylene and tetrafluoroethylene copolymers for pyrotechnic applications 

  Puts, Gerard Jacob (University of Pretoria, 2017)

  At present, the explosives industry in South Africa makes extensive use of heavy metal oxide pyrolants in the time-delay elements of detonators used in mining activities. There is a drive towards the use of safer and ...
• Titanium metal particle growth through autocatalytic electroless deposition in a molten salt slurry reactor 

  Swanepoel, Jaco Johannes (University of Pretoria, 2021)

  Near-net-shape manufacturing of titanium metal components through powder metallurgy confers various cost-saving benefits, from improved material utilisation to reduced energy consumption. Further savings can be realised ...
• Development of natural dye based biodegradable colourimetric intelligent packaging sensor labels 

  Dlamini, Khulekani (University of Pretoria, 2021)

  Colourimetric indicators were prepared using anthocyanins, poly(vinyl alcohol) and cellulose nano-fibre by the electro-spinning technique. The indicator label containing 2000 ppm anthocyanin was found to be the optimal dye ...
• Effect of castor oil, moringa seed oil and canola oil as lubricity enhancers for diesel fuel 

  Sakyi, Andrew Osei (University of Pretoria, 2021)

  The amphiphilic qualities of plant oils that emerge from their fatty acid makeup lead to improved lubricity. To produce diesel that is friendlier to the environment requires severe hydrotreating, unfortunately the same ...
• Fed-batch growth of Rhizopus oryzae : eliminating ethanol formation by controlling glucose addition 

  De Jongh, Nicolaas Willem (University of Pretoria, 2021-05)

  Rhizopus oryzae is a prominent strain for producing fumarate, where biomass growth precedes fumarate production. The natural bio film growth of R. oryzae as fungal mat was investigated using different glucose addition ...
• Optimal hydroponic growth of Brassica Oleracea at low nitrogen concentrations using a novel ph-based control strategy 

  Van Rooyen, Ignatius Leopoldus (University of Pretoria, 2021)

  Aquatic nitrogen pollution from conventional agriculture contributes severely to the degradation of numerous ecosystems and is considered one of the main contributors to earth's alarming rate of biodiversity loss. Soilless ...
• GPGPU-accelerated nonlinear state estimators : application to MPC-controlled bioreactor performance 

  Roos, Darren Craig (University of Pretoria, 2021)

  Practical control problems are subject to dealing with instrumentation noise and inaccurate models. These can be modelled as measurement and state noise, respectively. Nonlinear state estimators, for example a particle ...

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