Search Results - "van Hille, R.P."

Metal sulphides from wastewater: Assessing the impact of supersaturation control strategies by Mokone, T.P., van Hille, R.P., Lewis, A.E.

“…Metal sulphide precipitation forms an important component of acid mine drainage remediation systems based on bacterial sulphate reduction. However, the…”
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A critical evaluation of CO2 supplementation to algal systems by direct injection by Langley, N.M., Harrison, S.T.L., van Hille, R.P.

“…► Chlorella vulgaris was cultivated in 3.2l internal loop airlift photobioreactors. ► Overall gas mass transfer coefficient calculated at 0.0094s−1. ► PCO2 in…”
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Reactive oxygen species generated in the presence of fine pyrite particles and its implication in thermophilic mineral bioleaching by Jones, G. C., van Hille, R. P., Harrison, S. T. L.

“…In the tank bioleaching process, maximising solid loading and mineral availability, the latter through decreasing particle size, are key to maximising metal…”
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Removal and recovery of zinc from solution and electroplating effluent using Azolla filiculoides by Zhao, M, Duncan, J.R, van Hille, R.P

“…The removal of zinc ions from aqueous solutions and electroplating rinse effluent by Azolla filiculoides on batch and column studies was investigated. The…”
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Comparison of simulators for process and aqueous chemistry modeling by Lacour, Stella, Van Hille, Rob P., Peterson, Karen, Lewis, Alison E.

“…The capabilities of four commercial simulators to model precipitation processes is discussed via two case studies: copper(II) sulfide and cobalt(II) carbonate…”
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Resource recovery from tannery wastewater using an integrated biological system: Towards a circular bioeconomy and net positive tannery operations by Mpofu, A.B., Kaira, W.M., Holtman, G.A., Oyekola, O.O., van Hille, R.P., Welz, P.J.

“…Anaerobic digestion (AD) of tannery effluents generated by beamhouse processes is limited by ammonia and sulfur species. High sulfate concentrations in…”
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Effect of hydraulic residence time on biological sulphate reduction and elemental sulphur recovery in a single-stage hybrid linear flow channel reactor by Marais, T.S., Huddy, R.J., Harrison, S.T.L., van Hille, R.P.

“…[Display omitted] •Simultaneous BSR and partial sulphide oxidation achieved in a single, open reactor.•High volumetric rates and sulphate conversion achieved…”
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Effects of reactor geometry and electron donor on performance of the hybrid linear flow channel reactor by Marais, T.S., Huddy, R.J., van Hille, R.P., Harrison, S.T.L.

“…Semi-passive sulphate reducing bioreactors show potential to play an important role in remediation of persistent, low volume acid or neutral rock drainage,…”
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Demonstration of simultaneous biological sulphate reduction and partial sulphide oxidation in a hybrid linear flow channel reactor by Marais, T.S., Huddy, R.J., Harrison, S.T.L., van Hille, R.P.

“…[Display omitted] •Hybrid Linear Flow Channel supported simultaneous sulphate reduction and sulphide oxidation.•Efficient sulphate reduction in anaerobic bulk…”
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Effect of solution chemistry on particle characteristics during metal sulfide precipitation by Mokone, T.P., van Hille, R.P., Lewis, A.E.

“…This study presents the effect of metal to sulphide molar ratio and operational pH on the surface charge, mean particle size, and settling characteristics…”
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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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Effect of post-precipitation conditions on surface properties of colloidal metal sulphide precipitates by Mokone, T.P., Lewis, A.E., van Hille, R.P.

“…Metal sulphide precipitation is important in several hydrometallurgical processes. However, challenges exist in solid–liquid separation and recovery of the…”
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Determining the effect of acid stress on the persistence and growth of thermophilic microbial species after mesophilic colonisation of low grade ore in a heap leach environment by Tupikina, O.V., Minnaar, S.H., van Hille, R.P., van Wyk, N., Rautenbach, G.F., Dew, D., Harrison, S.T.L.

“…•After colonising at 25°C and heating to 50°C, bioleach columns of pH 1.2–1.7 maintained Eh>800mV.•After colonising at 25°C and heating to 50°C, Eh of pH 1.0…”
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Foreword by Harrison, S.T.L., Petersen, J., van Hille, R.P.

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The effect of temperature and culture history on the attachment of Metallosphaera hakonensis to mineral sulfides with application to heap bioleaching by Bromfield, L., Africa, C.-J., Harrison, S.T.L., van Hille, R.P.

“…► Attachment of M. hakonensis to sulphide minerals and ore improved with temperature. ► Negligible metabolic activity implied higher attachment was not an…”
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Biokinetic test for the characterisation of AMD generation potential of sulfide mineral wastes by Hesketh, A.H., Broadhurst, J.L, Bryan, C.G, van Hille, R.P, Harrison, S.T.L.

“…Acid mine drainage (AMD) is formed by the microbially catalysed oxidation of sulfide minerals on exposure to moisture and air. It results in the ongoing…”
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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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A continuous process for the biological treatment of heavy metal contaminated acid mine water by Van Hille, R.P, Boshoff, G.A, Rose, P.D, Duncan, J.R

“…Alkaline precipitation of heavy metals from acidic water streams is a popular and long standing treatment process. While this process is efficient it requires…”
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integrated algal sulphate reducing high rate ponding process for the treatment of acid mine drainage wastewaters by Rose, P.D, Boshoff, G.A, Van Hille, R.P, Wallace, L.C.M, Dunn, K.M, Duncan, J.R

“…Acid mine drainage pollution may be associated with large water volume flows and exceptionally long periods of time over which the drainage may require…”
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