Department of Process Engineering

Effect of varying operating conditions on cathode surface roughness using guar as a smoothing agent in copper electrowinning

Mkhawana, Nhlamulo (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

Mabutyana, Luntu (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

Van Tonder, Bronwyn (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

Maree, Chelaine (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

Makgoale, Tumelo (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)

Mwandawande, I.; Akdogan, G.; Bradshaw, S. M.; Karimi, M.; Snyders, N. (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

Mwandawande, I.; Akdogan, G.; Bradshaw, S. M.; Karimi, M.; Snyders, N. (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

Horak, Wessel (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

Mokomelea, Thapelo; Da Costa Sousa, Leonardo; Balan, Venkatesh; Van Rensburg, Eugene; Dale, Bruce E.; Gorgens, Johann F. (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

Ntimbani, Rhulani Nicolas (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

Morakile, Tumelo (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

Moonsamy, Talia Anne (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

Majeke, Bongo Mount-Batten (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

Du Toit, Chante Mirri (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

Bezuidenhout, Niel (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 ...