Biomining and bioleaching biomining and bioleaching. Oct 15, 2016 universal reserves of highgrade ores are diminishing at an alarming rate due to the rapid increase in the demand for metals. In order to investigate glycoconjugates, a major part of the eps, during biofilm formation bioleaching by archaea on pyrite, a screening with 75 commercially available lectins by fluorescence lectin. Pdf files, and powerpoint files could be flashconverted for smaller file. Pdf biomininga useful approach toward metal extraction. Biomining is applied bioleaching and biooxidation with the aim of extracting metals from ore in contrast to acid mine drainage which is uncontrolled and unintentional. Biomining is the extraction of specific metals from their ores through biological means usually bacteria. Bioleaching of cobalt containing pyrite in stirred reactors, a case study from laboratory scale to industrial application. Biotechnology for metal bearing materials in europe. In industrial bioleaching biomining three technical processes are differentiated. Biooxidation is the enrichment of metals, particularly gold, by mobilization and thus removal of interfering metal sulfides from ores bearing the precious metals rohwerder et al. Status of the bioleaching technologies and directions taken by biomine. Disadvantages slow process timeconsuming uranium industrialscale bioleaching by spraying stope walls with acid mine drainage insitu irrigation of fractured underground ore deposits.
In microbial leaching or bioleaching metals can be extracted from large quantities of low grade ores this process has been used for centuries to recover copper form the drainage water of mines the role of microbes in the bioleaching came into notice some 40 years ago. Biomining a useful approach toward metal extraction. Nowadays the production of copper from lowgrade ores is the most important industrial application and a significant part of world copper production already originates from heap or dumpstockpile bioleaching. The file contains 72 pages and is free to view, download or print. Biomining entails the use of acidophilic microbes to facilitate the recovery process of metals from sulfide minerals in the processes of bioleaching and biooxidation. Biomining is the use of autotrophic, acidophilic, iron, and sulfuroxidizing microorganisms to produce ferric iron and sulfuric acid. Recovering of minerals from microorganisms, recovering of oil and single cell oil. Biomining is an increasingly applied biotechnological procedure for processing of ores in the mining industry biohydrometallurgy. Customers affiliates powerpoint tutorial videotour infographics. These organisms secrete different organic compounds that chelate metals from the environment and bring it back to the cell where they are typically used to coordinate electrons. In a country like india biomining has great national significance where there is vast unexploited mineral potential mogal and desai, 1992. Biomining presentation chemistry natural materials. Biomining is a technique of extracting metals from ores and other solid materials typically using prokaryotes or fungi. Ores with low metal content are not suitable for direct smelting but it is possible to extract metals economically using the activity of microorganisms.
Valuable metals are commonly bound up in solid minerals. In a quest for engineering acidophiles for biomining applications. Biomining, bioleaching of copper, uranium and gold. Miroorganisms used for leaching the most commonly used microorganisms for bioleaching are thiobacillus thiooxidans and t. Biomining is the extraction of specific metals from their ores through biological means, usually microorganism. Due to an increase in consumerism, heightened dependence on technology, and an overall world population growth, more and more minerals and metals need to be extracted from the earths surface as shown in figure 1. View and download powerpoint presentations on copper bioleaching ppt. The environmental consequences of mining and quarrying are vast, as highlighted in the mining section. Ewaste recycling has become a hotly debated global issue. Dec 18, 2006 biomining is the biotechnology that uses microorganisms to recover metals, in particular copper and gold, from ores and concentrates.
Having developed from a very simple operational in terms of both engineering and biology process, biomining has developed into a multifaceted technology, to the extent that many of the largest industrial stirred tanks and heaps throughout the world are. Although pure cultures of bacteria or archaea can degrade sulfide minerals, it is now well established that bioleaching and biooxidation in all biomining operations is mediated by consortia of acidophilic prokaryotes. Biomining article about biomining by the free dictionary. In this method low grade ore is dumped into a heap. Although it is a new technique used by the mining industry to extract minerals such as copper, uranium and gold from their ores but nowadays biomining occupies an increasingly important place among the available mining technologies. Mining operations have long benefited from the activities of such naturally occurring microorganisms, especially the ability of some bacteria to leach the metals from insoluble ores. Biomining is done in two steps often called bioleaching and biooxidation. Bioleaching application of biotechnology in mining industry. Biomining is the use of microorganisms in the recovery of metals from ores. For the last 10 centuries, microorganisms have assisted in the recovery of copper dissolved in drainage from water. Bioleaching commonly refers to biomining technology applied to base metals. The second technique what are the benefits, and drawbacks of biomining. Readbag users suggest that 200809mscmicrobiologyallfoursemesterssyllabus.
The mineralogical society of america is composed of indivi duals interested in mineralogy, crystallography, petrology, and geochemistry. These chemicals are capable of oxidizing a variety of minerals. New resources for metals must be developed with the aid of novel technologies. Oct 19, 20 cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Biomining is the biotechnology that uses microorganisms to recover metals, in particular copper and gold, from ores and concentrates. What advantages does biomining have over other metal extraction methods. Biomining presentation free download as powerpoint presentation. During bioleaching, metals such as copper, nickel or zinc are oxidized through microbial action from the waterinsoluble sulfide to the soluble sulfate forms. Cell attachment on metal sulfides is important for this process. Feasibility step ii and basic engineering complementary testwork on bioleaching, zinc solvent extraction and electrowinning. Improve isolates by conventional mutation and selection or by genetic engineering. Industrial biomining processes are currently focused on metal sulfides and their dissolution, which is catalyzed by acidophilic ironii andor sulfuroxidizing microorganisms.
Use of lectins to in situ visualize glycoconjugates of. Commercial process of bioleaching naturally occur bioleaching process is very slow. Biomining and bioleaching powerpoint ppt presentation free to view. Aug 30, 2014 biomining for insitu resource utilization darin ragozzine harvard university 030504 nasa institute for advanced concepts student visions of the futu slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Ultra concentrated wetlands in a constructed environment make these the smallest footprint, highest efficiency solutions for a host of mining impacts or opportunities. The future of bioleaching isolate new bacterial strains from extreme environments, such as minedrainage sites, hot springs, and waste sites, and use these to seed bioleaching processes. Bioleaching kinetics the rate of bacterial oxidation is higher than that of chemical oxidation under. Read 200809mscmicrobiologyallfoursemesterssyllabus. Microbiology syllabus contents and scheme of examination for the candidates admitted from the academic year 20082009. Ppt biomining and bioleaching leon nyamweda academia. Although a number of unresolved challenges in conventional biomining remain, such as bioleaching chalcopyrite and using brackish and saline water for bioprocessing minerals, recent innovations, such as the reductive bioprocessing of oxidized metal deposits, suggest that new opportunities for developing biotechnologies in the mining and. For commercial extraction of metal by bioleaching the process is optimized by controlling the ph, temperature, humidity, o2 and co2 concentrations. Bioleaching microbes harvest energy for their metabolism by catalyzing the production and recycling of some leaching reagents.
Bioleaching is a conversion of an insoluble valuable metal into a soluble form by means of microorganisms. Role of tissue culture technology in crop improvements. Biomining for insitu resource utilization darin ragozzine harvard university 030504 nasa institute for advanced concepts student visions of the futu slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Thiagarajar college autonomous maudurai9 department of.
Oct 02, 2015 here is a small powerpoint presentation on bioleaching a phytomining. Jan 09, 2012 in relation to bacterial leaching and biomining, microorganisms are using and releasing minerals in the earths crust since ancient times. Microbial leaching bioleaching, biomining microbial leaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. Biomining techniques may also be used to clean up sites that have been polluted with metals. More practical approaches, taking into account local economic and social conditions and the principles of extended producer responsibility, are recommended to alleviate the increasing. This website and its content is subject to our terms and conditions. Find powerpoint presentations and slides using the power of, find free presentations research about copper bioleaching ppt. Biomining is the process of using microorganisms microbes to extract metals of economic interest from rock ores or mine waste.
The biologically produced leaching reagents attack the minerals and leach the metals in abiotic reactions. Chapters have been written by personnel from leading biomining companies, consultants and internationally recognized researchers and academics. Introduction bioleaching is the simple and effective technology for metal extraction from low grade ores and. Introduction future sustainable development requires measures to reduce the dependence on nonrenewable raw materials and the demand for primary resources. The researchers have found bioleaching microbes in mine sites and acid sulphate soils in the west australian wheatbelt. Some microbes can oxidize those metals, allowing them to dissolve in. This study, using china as a case study, analyzes the environmental, economic, and social implications of ewaste recycling in the developing world. Today the recovery of copper from sulfide ores is the most important industrial application, and a significant proportion of the world copper production originates from heap or dump. The formation of organic or inorganic acids protons.
Bioleaching of metals from hazardous spent hydroprocessing catalysts was attempted in the second stage after growing the bacteria with sulfur in the first stage. Heap or dump bioleaching, tank bioleaching, in situ or in place bioleaching. Biomining biotechnologies for extracting and recovering. Bhp billiton is the owner of the mine and manages the open pit copper mine in atacama desert, in the north. Biofilm formation is necessary for seeding and persistence of the active microbial community in industrial biomining heaps and tank reactors. Microbial leaching bioleaching, biomining environmental. Biomining mineral bioleaching, mineral biooxidation.
Engineering microbial consortia to enhance biomining and. Bioleaching of the metal sulfide rich concentrate to. Biomining and bioleaching a free powerpoint ppt presentation displayed as a flash slide show on id. A new laurentian university industrial research chair position in biomining, bioremediation and science communication has the potential to kickstart a new industry in sudbury that could create hundreds or even thousands of jobs, said the director of the vale living with lakes centre. Multiomics reveals the lifestyle of the acidophilic. These salttolerant microorganisms have been used to develop bioleaching cultures that could be used for biomining operations where fresh water is scarce or where the leach liquors are salty.
Pictures of each step in the process, a description to link to and differentiated questions. Capture acid mine drainage, precious metals and other elements passively with our patented metal removal units. Brittany molkenthin works cited pros a requires low input of labor b considerably green, low gas emission c low use of energy d lower costs to operate e cleaner process cons a limited to only a small. Ppt biomining and bioleaching powerpoint presentation. Culture of plant tissues, regeneration of plants, root culture, meristem culture, anther culture, pollen culture.
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