Search Results - "Van Hille, Robert P."

Controlled Nickel Sulfide Precipitation Using Gaseous Hydrogen Sulfide by Karbanee, Nazneen, van Hille, Robert. P, Lewis, Alison E

“…In the precipitation of metal sulfides from solution, either aqueous or gaseous sources of sulfide can be used. In this work, batch aqueous and gaseous sulfide…”
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Interference by pigment in the estimation of microalgal biomass concentration by optical density by Griffiths, Melinda J., Garcin, Clive, van Hille, Robert P., Harrison, Susan T.L.

“…Optical density is used as a convenient indirect measurement of biomass concentration in microbial cell suspensions. Absorbance of light by a suspension can be…”
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Lipid productivity, settling potential and fatty acid profile of 11 microalgal species grown under nitrogen replete and limited conditions by Griffiths, Melinda J, van Hille, Robert P, Harrison, Susan T. L

“…Microalgae are a promising alternative source of oil for biodiesel production. Identification of a species with desirable characteristics is a key component…”
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effect of nitrogen limitation on lipid productivity and cell composition in Chlorella vulgaris by Griffiths, Melinda J, van Hille, Robert P, Harrison, Susan T. L

“…Chlorella vulgaris accumulates lipid under nitrogen limitation, but at the expense of biomass productivity. Due to this tradeoff, improved lipid productivity…”
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Attachment of Acidithiobacillus ferrooxidans and Leptospirillum ferriphilum cultured under varying conditions to pyrite, chalcopyrite, low-grade ore and quartz in a packed column reactor by Africa, Cindy-Jade, van Hille, Robert P., Harrison, Susan T. L.

“…The attachment of Acidithiobacillus ferrooxidans and Leptospirillum ferriphilum spp. grown on ferrous medium or adapted to a pyrite mineral concentrate to four…”
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effect of degree and timing of nitrogen limitation on lipid productivity in Chlorella vulgaris by Griffiths, Melinda J, van Hille, Robert P, Harrison, Susan T. L

“…Improvements in lipid productivity would enhance the economic feasibility of microalgal biodiesel. In order to optimise lipid productivity, both the growth…”
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Iron solids formed from oxidation precipitation of ferrous sulfate solutions by Hove, Mfandaidza, van Hille, Robert P., Lewis, Alison E.

“…The oxidation and precipitation of iron from ferrous sulfate solutions was studied at high Fe2+ concentrations, as found in typical South African acid mine…”
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In situ investigation and visualisation of microbial attachment and colonisation in a heap bioleach environment: The novel biofilm reactor by Africa, Cindy-Jade, Harrison, Susan T.L., Becker, Megan, Hille, Robert P. van

“…In this paper, the development of a novel means of investigating the attachment and subsequent biofilm formation of mineral bioleaching micro-organisms to…”
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Bioreactor microbial ecosystems for thiocyanate and cyanide degradation unravelled with genome‐resolved metagenomics by Kantor, Rose S, Zyl, A. Wynand, Hille, Robert P, Thomas, Brian C, Harrison, Susan T. L, Banfield, Jillian F

“…Gold ore processing uses cyanide (CN⁻), which often results in large volumes of thiocyanate‐ (SCN⁻) contaminated wastewater requiring treatment. Microbial…”
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Kinetic analysis of biological sulphate reduction using lactate as carbon source and electron donor: Effect of sulphate concentration by Oyekola, Oluwaseun O., van Hille, Robert P., Harrison, Susan T.L.

“…This study investigated the effect of feed sulphate concentration on the kinetics of anaerobic sulphate reduction by a mixed SRB culture, using lactate as the…”
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Mechanisms of formation of iron precipitates from ferrous solutions at high and low pH by Hove, Mfandaidza, van Hille, Robert P., Lewis, Alison E.

“…The oxidation and subsequent precipitation of iron from solutions are very important for most hydrometallurgical wastewater treatment practitioners. The…”
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Effect of culture conditions on the competitive interaction between lactate oxidizers and fermenters in a biological sulfate reduction system by Oyekola, Oluwaseun O., Harrison, Susan T.L., van Hille, Robert P.

“…► Lactate used as substrate for microbial growth in sulfate reducing condition. ► Microbial growth parameters (μs and Ks) determined from experimental data. ►…”
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Study of anaerobic lactate metabolism under biosulfidogenic conditions by Oyekola, Oluwaseun O., van Hille, Robert P., Harrison, Susan T.L.

“…Biological sulfate reduction (BSR) has been reported to have potential for the treatment of acid mine drainage (AMD). The provision of a suitable carbon source…”
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Evaluation of the ASTERTM process in the presence of suspended solids by van Zyl, Andries W., Huddy, Robert, Harrison, Susan T.L., van Hille, Robert P.

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The effect of sulfide concentrate mineralogy and texture on Reactive Oxygen Species (ROS) generation by Jones, Gavin C., Becker, Megan, van Hille, Robert P., Harrison, Susan T.L.

“…► Metal-containing sulfide mineral concentrates generate ROS (H2O2+OH). ► ROS generation linked to decreased thermophilic bioleaching performance. ► ROS…”
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Copper sulphide precipitation in a fluidised bed reactor by van Hille, Robert P., A. Peterson, Karen, Lewis, Alison E.

“…The feasibility of the removal of a single metal (copper) by sulphide precipitation from a synthetic stream was investigated in a seeded fluidised bed reactor…”
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Investigating heap bioleaching: Effect of feed iron concentration on bioleaching performance by van Hille, Robert P., van Zyl, Andries W., Spurr, Nicholas R.L., Harrison, Susan T.L.

“…This paper describes an investigation into the effect of iron concentration in the leach solution on the bioleaching of a low grade copper ore, where…”
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The effect of different types of seeds on the oxidation and precipitation of iron by Hove, Mfandaidza, Van Hille, Robert P., Lewis, Alison E.

“…The use of different types of seeding material to cause the layer deposition of desired iron phases is an attractive technique for the treatment of industrial…”
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Development of a method to assay the microbial population in heap bioleaching operations by Coram-Uliana, Nicolette J., van Hille, Robert P., Kohr, William J., Harrison, Susan T.L.

“…Heap bioleaching is an economically viable approach to the mining of low-grade ores. Oxidation is microbially assisted, involving a consortium of…”
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Characterisation of the complex microbial community associated with the ASTER™ thiocyanate biodegradation system by Huddy, Robert J., van Zyl, A. Wynand, van Hille, Robert P., Harrison, Susan T.L.

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