Biomining by Douglas E. Rawlings, D. Barrie Johnson

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By Douglas E. Rawlings, D. Barrie Johnson

Biomining is the biotechnology that makes use of microorganisms to get better metals, specifically copper and gold, from ores and concentrates. Having constructed from a very easy operational (in phrases of either engineering and biology) approach, biomining has constructed right into a multifaceted know-how, to the level that some of the biggest commercial stirred tanks and lots through the international are hired for bioprocessing minerals.

This e-book has a powerful utilized strategy and describes rising and tested business techniques, in addition to the underlying idea of the method, and the biology of the microorganisms concerned. Chapters were written by way of body of workers from prime biomining businesses, specialists and across the world famous researchers and academics.

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Biomine ‘93 conference, Adelaide, pp 138–145 Oldshue JY (1956) Role of turbine impellers in aeration of activated sludge. Ind Eng Chem 48:2194–2198 Olivier W (2001) Flotation tailings as neutralising agent: Bogoso pilot run. In: Proceedings of the 4th BIOX™ users group meeting, Wiluna, pp 30–38 Olivier JW, van Niekerk JA, Chetty KR, Ahern N (2000) BIOX™ plant nutrient optimisation. In: Proceedings of the colloquium bacterial oxidation for the recovery of metals, Johannesburg, pp 1–6 Osei-Owusu J (2001) Operating cost reduction initiatives at the Ashanti BIOX™ plant as at July 2001.

2 Development of the Two-Stage BIOX™ Neutralization Process A two-stage neutralization process, using limestone and/or lime, was developed for the treatment of As(V)-bearing BIOX™ liquors. In the first stage, As(V) is precipitated as stable ferric arsenate by adjusting the pH to 4–5. The pH of the slurry is then increased to an environmentally acceptable level (pH 6–8) in the second neutralizing stage. The use of limestone allows for better pH control, particularly in the first neutralization stage, and is generally more economic than lime.

References Adams D, Preston M, Post T (1998) Mixing optimisation of high pressure oxidation of gold ore slurries. In: Proceedings Randol 1998, pp 217–221 Barter I, Carter AJ, Holder NHM, Miller DM, Van Aswegen PC (1992) Design and commissioning of a 40 tonne per day concentrate bioxidation treatment plant at the Harbour Lights Mine. In: Proceedings of extractive metallurgy of gold and base metals conference, Kalgoorlie, pp 113–119 Broadhurst JL (1992) The nature and stability of arsenic bearing tailings arising from the BIOX™ gold recovery process.

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