Masters Degrees (Process Engineering)
Recent Submissions
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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 ... -
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 ... -
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) ... -
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 ... -
Techno-economic analysis of Xylitol, Citric Acid and Glutamic Acid biorefinery scenarios utilizing sugarcane lignocellulose
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: A decrease in global sugar prices, lower crop yields (caused by drought) and the continued use of aging and inefficient infrastructure have been listed as external factors contributing to decreasing ... -
Determination of drainage rates of heavy media for different aperture sizes on a vibrating screen
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Media losses are a significant contributor to the operational cost in a dense media separation (DMS) circuit. Of these losses, up to 80 wt% can occur on the drain and rinse vibrating screens. Although these ... -
Development and feasibility of an electrochemical-oxidation process for water disinfection
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Quality of water supplies for potable use has deteriorated to such a state that point-of-use water disinfection has become a necessity. Historically, chlorine has been the most widely used disinfectant, ... -
Pellet-size estimation of a ferrochrome pelletizer circuit using Computer Vision techniques
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Agglomerate pellet size plays an integral part in the safe and stable operation of a submerged arc furnace (SAF), and the efficiencies and yields achieved within the ferrochrome refining processes. For ... -
Design, construction and evaluation of a vacuum evaporation system for the concentration of aqueous whey protein solutions
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Vacuum evaporation is an old and established technology for the industrial concentration of high water content streams. It is a clean, safe and versatile technology with low management costs. The aim of ... -
Extraction and modification of hemicellulose from wheat bran to produce entrapment materials for the controlled release of chemicals and bioactive substances
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Hydrogels are a network of cross-linked hydrophilic polymers that form an insoluble three-dimension structure capable of imbibing large amounts of fluid and they can be used as entrapment matrices for ... -
The microbial devulcanisation of waste ground tyre rubber using acidophilic microorganisms
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: The structural stability provided by vulcanisation presents a major hurdle in the reclamation of tyre rubber. Devulcanisation processes aim to break the sulphur crosslinks in the tyre matrix, while preserving ... -
Lactic acid production from sugarcane bagasse and harvesting residues
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Sugarcane bagasse and harvesting residues collected from different sugars mills across South Africa were evaluated for potential use in a biorefinery for ethanol, lactic acid and electricity co-production ... -
Pyrolysis of waste plastics into chemicals as an alternative to landfilling or incineration
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: World population growth has brought about high production and consumption trends on the petroleum resources. One aspect contributing to this trend is plastic manufacture accounting for considerable petroleum ... -
Evaluating the applicability of an alkaline amino acid leaching process for base and precious metal leaching from printed circuit board waste
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: The recovery of metals from waste printed circuit boards (PCBs), a key component in electronic equipment, is beneficial from both an environmental and economic perspective. Current hydrometallurgical ...
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