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Theses and Dissertations (Chemical Engineering): Recent submissions
Now showing items 1-20 of 315
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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(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 ...
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Fed-batch growth of Rhizopus oryzae : eliminating ethanol formation by controlling glucose addition (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 ...
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(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 ...
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GPGPU-accelerated nonlinear state estimators : application to MPC-controlled bioreactor performance (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 ...
Now showing items 1-20 of 315