Research Articles (Process Engineering)
Recent Submissions
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Scalable methanol‑free production of recombinant glucuronoyl esterase in Pichia pastoris
(BMC (part of Springer Nature), 2019)Objective: Glucuronoyl esterase (GE) is an emerging enzyme that improves fractionation of lignin-carbohydrate complexes. However, the commercial availability of GE is limited, which hinders the research of GE-based ... -
Desorption of isobutyl acetate into air as a low-cost alternative system for the measurement of liquid phase mass transfer coefficients
(AIDIC, 2018)ENGLISH ABSTRACT: A study was conducted in enhancing the measurement of volumetric liquid phase mass transfer coefficients (K˪a) in packed columns, by re-considering the application of conventional desorption and absorption ... -
Hydrodynamics of a packed column operated under supercritical conditions
(AIDIC, 2018)ENGLISH ABSTRACT: There is a lack of hydrodynamic data under supercritical conditions, in particular in systems that attempt to isolate hydrodynamics from mass transfer. This paper presents hydrodynamic data focusing on ... -
The effect of fluid properties and packing size on the hydrodynamics of packed columns
(AIDIC, 2018)ENGLISH ABSTRACT: The effect of fluid physical properties on the hydrodynamic behaviour in a packed column with 1.5” and 2.5” fourth generation random packing was investigated by measuring the pressure drop and liquid ... -
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 ... -
Frequency sensitive mechanism in low-intensity ultrasound enhanced bioeffects
(Public Library of Science, 2017)This study presents two novel theoretical models to elucidate frequency sensitive nuclear mechanisms in low-intensity ultrasound enhanced bioeffects. In contrast to the typical 1.5 MHz pulsed ultrasound regime, our group ... -
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 ... -
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 ... -
Mining-Related Selenium Contamination in Alaska, and the State of Current Knowledge
(MDPI, 2017)ENGLISH ABSTRACT: Selenium pollution has been a topic of extensive research dating back further than the last decade and has attracted significant attention from several environmental and regulatory agencies in order to ... -
Comparison of constitutive and inducible β-fructofuranosidase production by recombinant Pichia pastoris in fed-batch culture using defined and semi-defined media
(Elsevier, 2016)ENGLISH ABSTRACT: Short-chain fructooligosaccharides produced from sucrose by transfructosylation using β-fructofuranosidase (FFase), an industrially important enzyme, finds application in pre-biotics, sweeteners and ... -
Post-treatment of distillery wastewater after UASB using aerobic techniques
(South African Society for Enology and Viticulture, 2007)The treatment of high-strength wastewater from a distillery using grape-based feedstock was conducted through sequencing the upflow anaerobic sludge blanket (UASB) reactor and the aerobically-activated sludge reactors. The ... -
Multi-product biorefineries from lignocelluloses : a pathway to revitalisation of the sugar industry?
(BioMed Central, 2017-04-11)Background Driven by a range of sustainability challenges, e.g. climate change, resource depletion and expanding populations, a circular bioeconomy is emerging and expected to evolve progressively in the coming decades. ... -
Techno-economic comparison of ethanol and electricity coproduction schemes from sugarcane residues at existing sugar mills in Southern Africa
(BioMed Central, 2014-07)Background: The economics of producing only electricity from residues, which comprise of surplus bagasse and 50% post-harvest residues, at an existing sugar mill in South Africa was compared to the coproduction of ... -
Sonic injection into a PGM Peirce-Smith converter : CFD modelling and industrial trials
(The Southern African Institute of Mining and Metallurgy, 2015)ENGLISH ABSTRACT: Peirce-Smith converters (PSCs) are extensively used in the copper, nickel, and platinum group metals industries. The typical converting operation involves lateral purging of air into molten matte through ... -
Physical and numerical modelling of a four-strand steelmaking tundish using flow analysis of different configurations
(The Southern African Institute of Mining and Metallurgy, 2015)ENGLISH ABSTRACT: Modern tundishes have evolved as vessels to serve as the final step in refining of molten steel by removing inclusions and promoting thermochemical homogeneity. In this study the flow behaviour in a ... -
The recovery of platinum group metals from low-grade concentrates to an iron alloy using silicon carbide as reductant
(The Southern African Institute of Mining and Metallurgy, 2015)The purpose of the study was to investigate the feasibility of SiC reduction of low-grade concentrates from Lonmin’s Rowland and Easterns operations with respect to metal fall and PGM recovery. These concentrates are rich ...
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