BIOMINING RAWLINGS PDF

Biomining-A useful approach toward metal extraction Abstract: Biomining is the extraction of specific metals from their ores through .. Rawlings, D.E., Biomining [Douglas E. Rawlings, D. Barrie Johnson] on *FREE* shipping on qualifying offers. Biomining uses microorganisms to recover metals, . Editorial Reviews. From the Back Cover. Biomining is the biotechnology that uses Biomining – Kindle edition by Douglas E. Rawlings, D. Barrie Johnson.

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Biomining : Douglas E. Rawlings :

In this respect, some early work by Oldshuecan be cited. In Biohydrometallurgy and the Environment Towards the 21st Century. Improved method for the dynamic measurement of mass transfer coefficient for application to solid-substrate fermentation. Different expressions for the critical speed have been proposed since then Oldshue, ; Tatterson, By using our website you agree to our use of cookies. The Chuquicamata copper mine in Chile producedtons of fine copper in This is problematic because the metabolic activities of these other species do not produce the ferric ions responsible for solubilizing copper sulfates.

The term biomining have been coined to refer to the use of microorganisms in mining processes. High affinities are reflected in low K S values, of the order of a few milligrams per liter, as in the case of most sugars. So bacterial leaching is a process by which the metal of interest is extracted from the ore by bacterial action, as in the case of bacterial leaching of copper. Report corrections to Microbewiki.

Biomining – Google Books

In this work the main objective was to avoid solids deposition on the bottom of bilmining tank, but the homogeneity of the slurry was not of special concern. Dimensional analysis for fluid agitation systems. The book describes several industrial bioleaching and biooxidation processes as well as the underlying theory and biology of the microbes involved. Biomining, the use of micro-organisms to recover precious and base metals from mineral ores and concentrates, has developed into a successful and expanding area of biotechnology.

  BILLE UND ZOTTEL PDF

Copper Mining Using Acidothiobacillus

Modern biomining processes are large-scale operations that involve the mining of ores and processing for several months Fig. Recent Developments in Modeling the Kinetics of Bioleaching. Oxygen transfer to Thiobacillus cultures. In the last few years a number of interesting papers have been published on agitation of slurries in bioreactors for the biooxidation of gold concentrates Fraser, ; Kubera and Oldshue, ; Fraser, ; Oolman, ; Dew, biomininf Howk et al.

Heap operation is simple and adequate to handle large volumes of minerals, but their productivity and yields are limited because of the severe difficulties in exerting an adequate process control. Whatever directions biomining will take in the future, it will doubtlessly prove to be immensely beneficial in a future with dwindling resources. In reactors these gases are usually supplied by bubbling air into the liquid.

Factors affecting bio-oxidation of sulfide minerals at high concentration of solids: Visit our Beautiful Books page and find lovely books for kids, photography lovers and more. The pitched blade turbine gave the lowest critical speeds, pointing to the fact that that the presence of an axial component in the flow is positive for solids suspension. The main limitation in the use of reactors in biomining is the biominong large amounts of run-of-mine ore that in most cases is to be treated.

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The selection of a suitable reactor for a biomining process and its design should be based in the physical, chemical and biological characteristics of the system. Bioleaching of heavy metals, biooxidation of gold ores, desulfurization of coal and oil, tertiary recovery of oil and biosorption of metal ions are examples of the wide variety rawlingz potential and actual applications of microorganisms in mining and related fields Karavaiko, ; Kelley and Tuovinen, ; Lawrence and Poulin, ; Rawlings, ; Brierley and Brierley, A kinetic study of the leaching of chalcopyrite with Sulfolobus metallicus.

The performance of bacterial leach reactors for the pre-oxidation of refractory gold-bearing sulphide rwlings.

Currently studies are rawlinfs carried on for the development of processes for the bioleaching of copper concentrates. Jakson Hole, Wyoming, 13 th th August.

Continuous-flow, stirred tanks are characterized by homogeneous and constant growth conditions where the selection is for rapid growth, and consequently tank consortia tend to be dominated by two or three species of micro-organisms. Heaps and dumps are irrigated in closed circuit with an acidic liquor that contains a fraction of the bacterial population, the rest being attached to mineral. This review discusses theoretical and pragmatic aspects of assembling microbial consortia to process bio,ining mineral ores and concentrates, and the challenges for using constructed consortia in non-sterile industrial-scale operations.