Department of Process Engineering
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Expanding the semantic range to enable meaningful real-world application in chemical engineering
(HESA, 2019)ENGLISH ABSTRACT: Legitimation Code Theory has proven to be useful in analysing the relationship between theory and practice. Semantic gravity can be used to illustrate teaching and learning processes that move between ... -
Numerical and physical modelling of tundish slag entrainment in the steelmaking process
(The Southern African Institute of Mining and Metallurgy, 2017-05)ENGLISH ABSTRACT: Physical and numerical modelling methods were followed to identify mechanism(s) for tundish slag entrainment in a bare tundish and one with a flow control device (FCD). The physical and numerical models ... -
Characterization of precipitate formed during the removal of iron and precious metals from sulphate leach solutions
(The Southern African Institute of Mining and Metallurgy, 2017-08)ENGLISH ABSTRACT: Nickel sulphate leach solutions produced in the first leaching stage of base metal refineries contain impurities such as iron as well as precious metals (Rh, Ru, and Ir). Iron precipitation results in ... -
A potential source of undiagnosed Legionellosis : Legionella growth in domestic water heating systems in South Africa
(Elsevier, 2018-12-02)ENGLISH ABSTRACT: Legionella is a genus of pathogenic bacterial mesophiles that cause a range of diseases collectively referred to as Legionellosis, with immunocompromised individuals being particularly susceptible. Water ... -
Applying dynamic Bayesian Networks to process monitoring
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: In efforts to reduce the impact of human error on the operation of chemical and mineral processing plants, reliable process monitoring solutions attempt to assist plant operators and engineers to detect ... -
Monitoring, modelling and simulation of spiral concentrators
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Spiral concentrators are robust gravity separation devices often compactly implemented in industry with large amounts of spirals per plant – organized in banks. Current automated monitoring strategies at ... -
The recovery of aluminium utilising the Donnan Membrane process
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: The recovery of aluminium from Water Treatment Residuals (WTRs) is both an economic and environmental advantage. Its economic attractiveness lies in the fact that the aluminium can be recycled and reused ... -
Phase Equilibria & thermodynamic modelling of the ternary system CO2 + 1-decanol + N-Tetradecane
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Experimental data and predictive process models, tested at various operating conditions, have shown that supercritical fluid fractionation is a feasible process when aimed at the separation of detergent ... -
Characterizing the role of polyacrylamide additives in copper electrowinning
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Additives have been used for many years in the copper electrowinning process to improve cathode morphology. The industry has leaned towards polysaccharides in the form of Guar. Polyacrylamides however ... -
Synechococcus PCC 7002 growth in anaerobic digestion effluent and off-gas
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Anaerobic digestion (AD) effluent is a low-cost and nutrient-rich medium produced at significant volumes, on which algae can be grown. The biogas that is produced by AD is commonly burnt, for heating or ... -
The development and characterization of a thermosiphon photobioreactor for the cultivation of photosynthetic bacteria
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Since their 1st appearance in 1940s, closed photobioreactors (PBRs) have received significant attention as biotechnological systems, as viable alternatives to open systems. These improvements were aimed ... -
Development and optimisation of a process for cellulose nanoparticle production from waste paper sludge with enzymatic hydrolysis as an integral part
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: The identification of low-cost and renewable resources is critical to meet environmental concerns associated with fossil-based materials. Waste pulp and paper fibres is a renewable, low-cost, cellulose-rich ... -
Development and comparison of processes for the extraction of dietary protein from yellow peas
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: The food industry is constantly on the lookout for healthier and more affordable options in place of animal-derived proteins, soy (which has taken a lead role in the replacement of animal-based proteins) ... -
The applicability of nanofiltration for the treatment and reuse of textile reactive dye effluent
(Water Research Commission, 2015)The main aim of the study was to test the feasibility of using nanofiltration (NF) processes for the treatment of reactive dyebath effluents from the textile industry, in order to recover the water and chemicals (salts) ... -
Solvent extraction of polyphenolics from the indigenous African fruit ximenia caffra and characterization by LC-HRMS
(MDPI, 2018)Indigenous and non-commercial fruits can be an important source of antioxidant polyphenols; however, the identity and content of polyphenols from non-commercial fruits are often poorly described. The study aimed to ... -
Ethanol production potential from AFEX™ and steam-exploded sugarcane residues for sugarcane biorefineries
(BioMed Central, 2018-05-04)Background: Expanding biofuel markets are challenged by the need to meet future biofuel demands and mitigate greenhouse gas emissions, while using domestically available feedstock sustainably. In the context of the ... -
Base metal recovery from glycine leach solutions using ion exchange or solvent extraction
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Technological advances lead to a reduced life span of electronic equipment. This leads to large quantities of electronic waste being produced. The recovery of metals from electronic waste has both an ... -
Mechanisms and kinetics of atmospheric sphalerite oxidative and non-oxidative leaching
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: A kinetic study of the non-oxidative and oxidative leaching of sphalerite concentrates, under elevated temperatures (75 – 95 °C) and atmospheric pressure is presented in this dissertation. Sphalerite, a ... -
Phase equilibrium of limonene, p-cymene, indane, butylbenzene and 1,2,3-trimethylbenzene at subatmospheric conditions
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Waste tyre pyrolysis has long been seen as a suitable solution to the growing issue of accumulation of waste tyres in our environment. The pyrolysis of waste tyres produces three useful products, namely ... -
The high pressure phase behaviour of detergent range alcohols and alkanes
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Supercritical fluids fulfil specialised roles in the food and beverage, petroleum, natural gas, polymers, pharmaceuticals and novel materials development industries. Supercritical fluid extraction (SFE) ...
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