Department of Process Engineering
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Recent Submissions
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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, ... -
Assessment of enzyme recycling schemes for paper sludge fermentation using kinetic modelling
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Ethanol for road transport is well established, but it also presents a “gateway molecule” in the bigger circular economy setting, where it is used for jet fuels, bioplastics, organic solvents, etc. These ... -
Improving energy and economic performances of a typical sugarcane factory through energy indicator development, set-point optimization, and optimal sensor placement
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: The volatile sugar markets and the recent recognition of bagasse as a key feedstock to produce biofuels and bioproducts have prompted a desire in the sugarcane industry to correct energy inefficiencies ... -
Development of integrated processes for the coproduction of inulin, protein, and ethanol from Jerusalem artichoke tubers in a biorefinery
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Biorefining is an attractive approach to simultaneously address food supply, energy security and global warming. Furthermore, biorefining offers a sustainable strategy to utilise biomass, for energy ... -
Modelling and sustainability analysis of biorefineries using sugarcane lignocellulose to produce polyethylene, sorbitol, glucaric acid and levulinic acid at existing South African sugar mills
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: The sugar industry in South Africa and the region has been plagued by factors including the low international sugar prices, reduced cane yields due to climate change and competition from new market entrants ... -
Technical and economic comparison of pyrolysis and pelleting for valorisation of pulper rejects from a secondary tissue mill, as alternative to disposal
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: South African paper mills are researching solutions to divert commercial and industrial waste (C&IW) from landfills. This problem is driven by increasing landfill fees, and pressure from the Department ... -
The pelleting of micro-fine agricultural lime to treat soil acidity, using sodium alginate, lignosulphonate, and bentonite as binders
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Limestone is often used to ameliorate soil acidity, as the release of carbonate ions neutralises acids in the soil. Agglomerated micro-fine limestone is an attractive alternative to powdered limestone ... -
Techno-economic and sustainability models for integration of cassava waste-based biorefineries into cassava starch processes based on process simulation and a systems modelling approach
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Cassava crop high starch yields, accompanied by its tolerance to drought/low soil nutrients, have increased research attention towards the crop’s adoption as a potential food security and economic empowerment ... -
Fault pattern recognition in simulated furnace data
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Modern submerged arc furnaces are plagued by blowbacks; hazardous occurrences where hot, toxic furnace freeboard gases are blown into the environment. While common occurrences, their causes are currently ... -
State-based decision support for condition shifting of multimodal continuous processes
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Automated distributed control systems are able to keep controlled variables at their set points and thus are able to maintain process operation within an operating mode (quasi-steady state). These automated ... -
An investigation into the effect of inline coagulation and air scouring to minimize ultrafiltration membrane fouling
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: The quality of raw water is an essential factor that determines the treatment technologies and level of treatment required to attain specified treatment objectives. Water utilities such as Rand Water ... -
Numerical modeling of high-pressure phase-equilibria data using neural networks
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: The design of process systems is greatly dependent on phase behaviour data, which can be predicted using equations of state(EOSs). These models, however, often fail to predict the behaviour near the mixture ... -
The measurement and modelling of vapour-liquid equilibria in ternary systems containing polar, cross-associating, and associating compounds
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: The accurate production of simple binary vapour liquid equilibria (VLE) data sets is time consuming and expensive, and the measurement of similar data sets for multi component ... -
Development of an oleophobic woven fabric microfiltration membrane for decentralized sanitation applications
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: Developing countries are faced with the major challenge of providing safe and adequate sanitation to their citizens. Decentralized sanitation systems have a great potential to address this challenge. The ... -
An initial investigation into the application of surfactin, a biosurfactant, as an alternative desulphurisation agent, for the prevention of acid mine drainage, via froth flotation
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: Coal mining plays a significant part in the South African economy. One of the largest problems associated with coal mining is acid mine drainage (AMD), which is produced through the oxidation of ... -
Degradation of plastics in the marine environment with reference to temperature and environmental factors
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: Plastic waste is an increasing problem, especially in the marine environment, where it has detrimental effects on the ecosystem . For a better comprehension of the environmental implications and eventual ...
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