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- Browsing Theses and Dissertations (Chemical Engineering) by Supervisor
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Browsing Theses and Dissertations (Chemical Engineering) by Supervisor "Nicol, Willie"
Now showing items 1-20 of 39
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(University of Pretoria, 2020-08-28)Biofilms of the bovine rumen bacterium Actinobacillus succinogenes have demonstrated their exceptional capabilities as biocatalysts for high productivity, titre and yield production of succinic acid (SA). Succinic acid is ...
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(University of Pretoria, 2009)The ozone decomposition reaction was performed in a 2.5cmx40cmx450cm two dimensional (2D) catalytic fluidized bed reactor. Commercial FCC catalyst impregnated with Fe2O3 was used at superficial gas velocities ranging between ...
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(University of Pretoria, 2013)There are many large-scale contacting methods for gas reactions requiring a solid catalyst. The catalytic gas-solid Fluidized Bed Reactor (FBR) is one of the popular methods in industry. In FBRs the bulk of the gas throughput ...
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(University of Pretoria, 2011-05-27)No abstract available.
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(University of Pretoria, 2015)The effectiveness of the genetically modified E. coli strain KJ 122 with regard to succinic acid (SA) production was evaluated under high cell density fermentation conditions in a continuous cell recycle reactor equipped ...
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(University of Pretoria, 2013)Continuous fermentations were performed in a novel external-recycle, biofilm reactor using D-glucose and CO2 as carbon substrates. Corn steep liquor (CSL) and yeast extract (YE) served as nitrogen sources. In anaerobic ...
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(University of Pretoria, 2016)Continuous fermentations were performed in an external-recycle, biofilm reactor using glucose and CO2 as carbon substrates. The nitrogen source for the auxotrophic Actinobacillus succinogenes was a combination of yeast ...
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(University of Pretoria, 2012-10-01)Please read the abstract in the section front of this document.
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(University of Pretoria, 2013)Actinobacillus succinogenes cells were grown on Poraver® support particles in a packed-bed reactor. Dilution rates (D) of 0.054–0.72 h-1 were investigated. Glucose was used as substrate. CO2 (g) was bubbled into a complex ...
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(University of Pretoria, 2012-06-26)Succinic Acid (SA) was continuously produced using glucose and a Mg2CO3(OH)2 slurry as feed. Glucose feed concentrations of 20 and 40 g ℓ-1 were employed with corresponding Mg2CO3(OH)2 slurry concentrations of 60 and 120 ...
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(University of Pretoria, 2012)A selective combination of the principles of a thermal mass flow meter and constant temperature anemometry was used to develop a solid mass flow meter that improves significantly on the flow meter developed by De Vos et ...
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(University of Pretoria, 2021)Current agricultural practices have proven unsustainable due to high reliance on chemical fertilizers. Several environmental problems such as leaching of nitrogen into water bodies and the release of NOx gasses emerge from ...
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(University of Pretoria, 2008-09-09)The entrainment rate of Ferrosilicone (FeSi) particles was measured in a 140 mm perspex column with air as the fluidising medium. Two different types of FeSi were used, namely atomised FeSi, which is mostly spherical in ...
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(University of Pretoria, 2023)Anaerobic digestion is a process whereby microorganisms break down waste material into simpler compounds, while simultaneously producing biogas that is generally high in methane and carbon dioxide content (60 –70 % and 30 ...
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(University of Pretoria, 2007-05-02)The prewetting of a trickle-bed reactor has important implications in the design and operation of these reactors. This is because the prewetting changes the flow morphology (shape and texture) of the liquid flowing through ...
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(University of Pretoria, 2020)Actinobacillus succinogenes is known to produce the acids of acetate and formate as co-products in conjunction with succinic acid. These compounds not only divert a portion of the carbon flux away from succinic acid ...
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(University of Pretoria, 2007-05-15)Reaction rate data at 50oC was generated in a batch reactor over a wide range of initial concentrations in the reaction mixture. In each case the reaction was allowed to reach equilibrium. Equilibrium conversion data clearly ...
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Fed-batch growth of Rhizopus oryzae : eliminating ethanol formation by controlling glucose addition (University of Pretoria, 2021-05)Rhizopus oryzae is a prominent strain for producing fumarate, where biomass growth precedes fumarate production. The natural bio film growth of R. oryzae as fungal mat was investigated using different glucose addition ...
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(University of Pretoria, 2015)A technique for analysing batch fumaric acid fermentations is presented. Off-gas measurements were included in the analysis, which assisted in improving the accuracy by means of data reconciliation due to these extra ...
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(University of Pretoria, 2011)Please read the abstract in the dissertation. Copyright
Now showing items 1-20 of 39