Department of Process Engineering
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Effect of varying operating conditions on cathode surface roughness using guar as a smoothing agent in copper electrowinning
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Organic additives play a very important role in copper electrowinning to facilitate the production of cathode deposits with improved morphology. Guar has been used as the standard organic additive ... -
Biohydrogen production potential of R. palustris CGA009 by photofermentation of liquid hydrolysate obtained from steam explosion of BSG
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The current study aimed to investigate photo-fermentative biohydrogen gas production potential of Rhodopseudomonas palustris CGA009 by utilising the liquid hydrolysate of brewers spent grain (BSG), ... -
Characterisation of propellants for interior ballistic simulation
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Interior ballistics can be described as the field of gun propulsion that pertains to the combustion of energetic material in the gun chamber to propel a projectile through the gun barrel. The characterisation ... -
Lignin phenol formaldehyde resins synthesised using South African spent pulping liquor
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: The current study investigated to which extent phenol could be replaced by lignins to produce lignin phenol formaldehyde (LPF) resins. This was done utilising soda lignin and sodium lignosulphonate as ... -
Momentum transfer from Arc to slag bath in an ilmenite smelting DC Arc furnace - a computational analysis
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Direct current (DC) arc furnaces are used for a variety of applications, including steelmaking, chromite smelting, ilmenite smelting, and nickel laterite smelting. Understanding the behaviour of DC ... -
Prediction of gas holdup in a column flotation cell using computational fluid dynamics (CFD)
(The Southern African Institute of Mining and Metallurgy, 2019-01)ENGLISH ABSTRACT: Computational fluid dynamics (CFD) was applied to predict the average gas holdup and the axial gas holdup variation in a 13.5 m high cylindrical column 0.91 m diameter. The column was operating in batch ... -
Investigation of flow regime transition in a column flotation cell using CFD
(Southern African Institute of Mining and Metallurgy, 2019-02)ENGLISH ABSTRACT: Flotation columns are normally operated at optimal superficial gas velocities to maintain bubbly flow conditions. However, with increasing superficial gas velocity, loss of bubbly flow may occur with ... -
On the kinetics of a novel homogeneous metal catalyst for n-octane activation
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: A research project was conducted to investigate the kinetics of the oxidation of n-octane to oxygenated products in the presence of an iron-pyridine-imine organometallic catalyst, to develop a mechanistic ... -
Incorporating anaerobic co-digestion of steam exploded or ammonia fiber expansion pretreated sugarcane residues with manure into a sugarcanebased bioenergy-livestock nexus
(Elsevier, 2019)ENGLISH ABSTRACT: The co-digestion of pretreated sugarcane lignocelluloses with dairy cow manure (DCM) as a bioenergy production and waste management strategy, for intensive livestock farms located in sugarcane regions, ... -
Technical and economic aspects of furfural and ethanol co-production from sugarcane bagasse and harvest residues, annexed to a sugar mill
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Lignocellulose biomass has potential to reduce the consumption of fossil resources. Furfural and ethanol are some of the most promising bioproducts that can be produced from lignocellulose biomass, with ... -
Comparative techno-economic assessment of sugarcane biorefineries producing glutamic acid, succinic acid, levulinic acid and xylitol from A-molasses and lignocellulosic biomass
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: The financial sustainability of the South African sugar industry is currently threatened by difficult economic conditions, including external factors such as low sugar prices by new global competitors, ... -
Techno-economic analysis and benchmarking of integrated first and second generation biorefinery scenarios annexed to a typical sugar mill for bioethanol production
(Stellenbosch : Stellenbosch University, 2021-03)AFRIKAANSE OPSOMMING: Die ontwikkeling van ekonomies en omgewings voordelige bio-etanolprosesse word voortdurend meer belangrik vir energiesekuriteit en omgewingslaste soos groenhuisgas emissies van die vervoerindustrie. ... -
The enzymatic valorisation of technical lignins from different sources to phenols
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Next to cellulose, lignin is the second most abundant natural polymer in the world. Commercially, it is generated as a by-product of the paper and pulp industry and emerging cellulosic ethanol processes. Both ... -
Repolymerisation of lignins extracted from wood pulps through enzymatic modification to establish viable valorisation routes
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Lignin is an amorphous polymer providing structure and strength to the cell walls in plants. In the process of making pulp the lignin is removed or solubilised from woodchips and burnt for steam ... -
Development of a fed batch fermentation strategy to produce bioethanol from non-detoxified hardwood spent sulphite liquor
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Hardwood spent sulphite liquor (HW-SSL) from the pulp and paper industry is a potential substrate for bio-ethanol production, due to wide availability and high concentration of monomeric sugars (+100 g/L ... -
Uncatalysed steam pretreatment regimes for bagasse and harvest residues in a sugarcane biorefinery
(Stellenbosch : Stellenbosch University, 2020-03)ENGLISH ABSTRACT: Biorefining of sugarcane lignocellulosic wastes, i.e. bagasse and harvest residues, at existing cane sugar mills can diversify product ranges to potentially improve profitability. Bagasse is the fibrous ... -
Value recovery from mine calcine tailings
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: As gold mining progresses, rich and free-milling ores which are metallurgically easy to process eventually get depleted. More metallurgically complex ores are encountered. These ores yield gold recoveries ... -
In situ extraction and recovery of volatile fatty acids from biogas-producing anaerobic digestion
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: An important set of compounds which are produced as intermediates in anaerobic digestion (AD) technologies, although they are not widely recovered as products in biogas plants, are volatile fatty acids ... -
Engineering strategies for enhancement of bio-hydrogen production by phototrophic bacterium Rhodopseudomonas palustris
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: The photosynthetic bacterium Rhodopseudomonas palustris demonstrates an exceptional metabolic diversity and is capable of consuming a wide variety of organic compounds including those toxic to other ... -
Paper and pulp mill waste valorisation via the production of phosphate ceramic composites
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Paper and pulp mills in South Africa annually generate approximately 500 000 tonnes of wet paper and pulp sludge that is sent to landfill sites. Additionally, lignin is one of the most abundant biomaterials, ...