Department of Process Engineering
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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) ... -
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 ... -
Microwave processing of materials
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: The world is under increasing pressure to develop new, more energy-efficient technologies that enable the production of less waste and are more sustainable. Material processing through microwave energy has ... -
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 ... -
Systems approach in developing a model for sustainable production of bioenergy in Malawi
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Bioenergy production from primary forest and rice residues can contribute to modern energy supply, such as electricity, liquid biofuels and gas, to rural communities in Malawi. These bioresources can be ... -
Optimisation of thermal treatment of invasive alien plants (IAPs) for char production for use in combustion applications
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH SUMMARY: Due to the popular worldwide demand for need to use cleaner fuels, lignocellulosic-derived char is gaining importance as a possible component in co-firing with coal. In order to avoid deforestation of ... -
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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