Department of Process Engineering
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Pyrolysis of contaminated PS single-layer and LDPE/PET multi-layer waste plastic packaging to optimise the production of oil for fuel applications
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: It has been predicted that by 2050 there will be more plastic in the ocean than fish by weight. Besides the obvious environmental threat, plastic waste also poses a loss of valuable hydrocarbon-based ... -
Design and modeling of an experimental tilapia and African catfish recirculating aquaculture system
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: This study aimed to design a new warm-water recirculating aquaculture system (RAS) that will have the flexibility to rear both African catfish (Clarias gariepinus) and Mozambique tilapia (Oreochromis ... -
Use of South African spent pulping liquor to synthesise lignin phenol formaldehyde resins
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: The probable scarcity of petroleum-based products, the resultant price fluctuations, and environmental concerns have driven the need for a total or partial phenol replacement in phenol-based products. ... -
The valorisation of paper sludge for green composite material
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: The South African pulp and paper industry generates about 500 000 wet tons of paper sludge (PS) per annum with the traditional means of waste disposal being landfilling. Increased efforts have been put ... -
Investigating the influence of electrolyte composition on electrodeposition in copper electrowinning
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: The major concern in copper electrowinning is to deposit smooth, dense, pure copper at high current efficiency and low energy consumption. Electrolyte physicochemical propertiesnamely ... -
Process improvements and techno-economic analyses for the production of short-chain fructose-containing oligosaccharides from sucrose and Jerusalem artichoke tubers
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: Recent years have seen significant growth in the global market for short-chain fructooligo saccharides (scFOS) and inulooligo saccharides (IOS) due to the rising health ... -
The effect of environmental conditions on growth and phenotype switching in Mycobacterium smegmatis
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Mycobacterium tuberculosis can exist within a host in a seemingly dormant state, in which it can tolerate antibiotic challenge. This non-heritable survival mechanism is thought to be the cause of latent ... -
An investigation into treatment options to improve the performance of re-used seed crystals for gypsum precipitation in the presence of an anti-scalant
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: Many mines in South Africa generate large volumes of acid mine drainage (AMD), containing relatively high concentrations of sulphates. Several mine water treatment plants utilise intermediate seeded slurry ... -
Techno-economic evaluation of organic solvent nanofiltration : recovering dewaxing solvent from lube-oil
(Stellenbosch : Stellenbosch University., 2020-03)ENGLISH ABSTRACT: To recover the solvent from dewaxed lube-oil, classical separations such as evaporation and distillation are typically used. In the past decade separations that consume less energy and utilities have been ... -
Designing and evaluating the technical, economic and environmental performance of an adsorption cooling system operating using bioresources from waste streams of mango processing
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: This study sought to improve the technical performance (coefficient of performance (COP) and specific cooling power (SCP)), environmental impacts and economic viability of employing the adsorption working ... -
High pressure phase equilibria of the system CO2 + N-dodecane + 3,7-dimethyl-1-octanol + 1-decanol
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: In the detergent manufacturing industry, the product streams containing the detergent range alcohols (C8-C20) are often contaminated with unreacted alkanes. Due to similarity in the boiling and melting ... -
Hydroformylation of post-metathesis product using rhodium-based catalysts
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: This study forms part of the overall scope of the RSA Olefins Programme for the upgrading of low-value α-alkene feedstocks to higher value detergent-range products within the South African context. The ... -
ADM1 Parameter Calibration Method based on partial least squares regression framework for industrial-scale anaerobic digestion modelling
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Anaerobic Digestion Model 1 (ADM1) is the mainstay modelling tool for Anaerobic Digestion research and development. Its growing popularity is attributed to its sophisticated yet expandable structure. Not ... -
The development of a semi-empirical electrowinning model to predict process performance
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Electrowinning is the final step in the hydrometallurgical production of high purity copper and comprises passing an electric current through a copper-containing electrolyte to plate solid copper onto a ... -
Solute transport in a submerged forward osmosis membrane system
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Wastewater treatment with forward osmosis (FO), an osmotically driven membrane process, has been investigated for the osmotic dilution of seawater prior to desalination in an attempt to lower the energy ... -
Techno-economic and environmental analysis of bio-oil production from forest residues via non-catalytic and catalytic pyrolysis processes
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Forest residues are a high fire risk and often disposed of by burning or sold as firewood; both contribute to air pollution, and the latter has low economic value. The 1.5 million dry metric tonnes of ... -
Valorisation of pyrolytic tyre char as filler in polypropylene
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Pyrolytic tyre char (PT-char) produced during waste tyre pyrolysis is conventionally perceived as a waste stream due to its high amounts of impurities. The aim of this research study is to investigate and ... -
Comparing the group-contribution SAFT-γ Mie equation of state with SAFT-VR Mie
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Group-contribution methods (GCMs) allow engineers to reduce time and other resources spent on conducting experiments for parameterisation of thermodynamic models, because GCMs grant users the ability to ... -
Aqueous two-phase systems for the extraction of polyphenols from wine solid waste
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: The South African wine industry produces large amounts of solid waste, which is left over after the wine making process is complete. This solid waste accounts for approximately 25% of the fresh grape mass ... -
Optimisation of enzymatic hydrolysis for solubilisation of the marine macroalgae Ecklonia maxima
(Stellenbosch : Stellenbosch University, 2019-12)ENGLISH ABSTRACT: Seaweeds are known to harbour a variety of compounds that exert biostimulant potential when applied to crops. These compounds are valued in commercial biostimulant products due to the biological activities ...
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