Sand w, tilman g, jozsa pg, schippers a 2001 biochemistry of bacterial leachingdirect vs indirect bioleaching. Bioleaching is a simple and effective technology for metal extraction from lowgrade ores. Ppt leaching powerpoint presentation free to download. Bioleaching of gold, copper and nickel from waste cellular. Bioleaching definition is the extraction of valuable metals such as copper and gold from ores through the action of microorganisms such as bacteria.
Graduate program in materials science and engineering, universidade do. There have been discoveries of newly identified acidophilic microorganisms that have unique characteristics for effective bioleaching of sulfidic ores and concentrates. Bioleaching is the extraction of metals from their ores through the use of living organisms. Bioleaching application of biotechnology in mining industry. Bioleaching technology in minerals processing john neale mintek, biotechnology division private bag x3015, randburg, 2125, south africa bioleaching is a process that employs microorganisms to dissolve leach sulphide minerals.
Watkin, role of microorganisms in bioleaching of rare earth elements from primary and secondary resources, applied microbiology and biotechnology, 10. In chemical processing industry leaching has a variety of commercial application. Bioleaching simple english wikipedia, the free encyclopedia. The metals can be recovered by the microorganisms by two processes. Recent commercially relevant developments in the biohydrometallurgy of zinc are discussed with respect to brisa, hydrozinc, heap bioleaching, and stirred tank biooxidation of mixed concentrates. Extraction of metals card sort phytomining and bioleaching. Bioleaching of covellite from low grade copper sulphide ore. Covellite is a secondary copper sulphide occurring in copper sulphide deposits and it is also formed by acidic dissolution of chalcocite. This biotechnical process, involving bacteria, archaea, fungi, and yeast, can be applied to both sulfide and nonsulfide minerals. Bioleaching can be defined as a hydrometallurgical dissolution process promoted by microorganisms for the recovery of metals from their oresconcentrates. Files included 1 copper bioleaching and phytomining. Tank bioleaching has been used for the recovery of gold from arsenical goldbearing concentrates since 1984 dew et al. Some of the types of bacteria used in this process include leptospirillum ferrooxidans, thiobacillus ferrooxidans, and some species of sulfolobus, acidianus, and sulfobacillus. Gold bioleaching of electronic waste by cyanogenic bacteria and its enhancement with biooxidation.
Bioleaching is performed mostly by iron and sulfide oxidizing bacteria, or acid producing fungus. The leaching efficiency was observed to be more or less the same in both the cases confirming that metabolites produced during growth of the microorganism, played a. Download the latest version of free powerpointppt to pdf. Screening for cultures, that grew in presence of the toxic heavy metals containing fly ash was successfully performed. Previous versions include powerpoint 2016, powerpoint 20, powerpoint 2010, powerpoint 2007, and powerpoint 2003. Microsoft powerpoint, slide presentation software, ppt. Alteration of groundwater and sediment geochemistry in a sulfidic backswamp due to melaleuca quinquenervia encroachment. Bioleaching article about bioleaching by the free dictionary.
Oct 19, 20 cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Integrated piloting of a thermophilic nickelcopper bioleaching process is the property of its rightful owner. Bioleaching or microbial ore leaching is a process used to extract metals from their ores using bacterial microorganisms. The technology has its origins in chile, where acidsoluble copper oxide heap leach operations were adapted to treat secondary copper sulfide ores. At present, bioleaching is employed on a large commercial scale to extract metals from sulfide minerals. Review of biohydrometallurgical metals extraction from. Either use low grade ores rework mine trailings or to avoid the extraction of large amounts of ores to the surface. View and download powerpoint presentations on copper bioleaching ppt. The process of leaching metals from ore by using bacteria or fungi to convert the metals into a soluble form.
This is much cleaner than the traditional method using cyanide. Sharma m, bisht v, singh b, jain p, mandal ak, lal b, sarma pm. Bioleaching is a process that employs microorganisms to dissolve leach sulphide minerals. Microsoft powerpoint with a microsoft 365 subscription is the latest version of powerpoint. Bioleaching where microorganisms are used to facilitate the mining of metals from their ores by facilitating their solotion. This is much cleaner than the traditional leaching processes like heap leaching using cyanide or other chemicals. Submitted for self study evaluation for the course mass transfer 2 fifth semester, chemical engineering 2016 submitted by. A free powerpoint ppt presentation displayed as a flash slide show on id.
Biomining will become more important as highgrade surface. Bioleaching is a simple and effective technology for metal extraction from lowgrade ores and mineral concentrates. The present work deals with optimization of culture conditions and process parameters for bioleaching of spent petroleum catalyst collected from a petroleum refinery. Bioleaching definition of bioleaching by medical dictionary.
Bioleaching or biooxidation employs the use of naturally occurring bacteria, harmless. Bioleaching for copper extraction of marginal ores from the. Soil microorganisms are very closely involved as catalytic agents in many geological processes. Bhp billiton is the owner of the mine and manages the open pit copper mine in atacama desert, in the north of chile.
Bioleaching allows the cycling of metals by a process close to natural biogeochemical cycles. Bioleaching of rare earth elements from monazite sand. In general, bioleaching is a process described as being the dissolution of metals from their mineral source by certain naturally occurring microorganisms or the use of microorganisms to transform elements so that the elements can be extracted from a material when water is filtered trough it atlas and bartha, 1997. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt. Oct 10, 2017 created using powtoon free sign up at youtube create animated videos and animated presentations for free. Theisen sludge, a finegrained byproduct from copper smelting is a secondary resource for the winning of strategic elements by metaloxidizing acidophilic bacteria. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly thiobacillus ferrooxidans and t. Bioleaching definition of bioleaching by merriamwebster. Improve isolates by conventional mutation and selection or by genetic engineering. Methods of metal recovery by microorganisms 2 methods.
Heap leach operations have gained popularity in the past around the world as a reasonable method for extracting metals such as gold, copper, and. Feasibility step ii and basic engineering complementary testwork on bioleaching, zinc solvent extraction and electrowinning. Bioleaching bioleaching is the extraction of metals from their. Rebgolds proprietary bioleaching process recovers valuable metals from crushed ore, neutralizes sulphides causing acid rock drainage and stabilizes toxic elements such as arsenic and cadmium. Bioleaching microbial leaching, being an economical and environmental friendly process, is investigated extensively for metal extraction from secondary solid wastes, viz. It finds application in the extraction of metals from their ores. Mar 02, 2017 bioleaching project in chile published on march 2 2017 bhp billiton is the owner of the mine and manages the open pit copper mine in atacama desert, in the north of chile. Parboiling metallurgic leaching water extraction method hot water. Jul 01, 2015 bioleaching of heavy metals from a lowgrade mining ore using aspergillus niger. Small scale experiments in shaking flasks with subsequent analysis of the pregnant leaching solution pls. Ppt biomining and bioleaching powerpoint presentation. Pictures of each step in the process, a description to link to and differentiated questions. Bioleaching or microbial ore leaching is a process used to extract metals from their ores using bacterial. Mesophiles moderately thermophilic bacteria extremophiles.
Currently, heap bioleaching is the most convenient technology to treat low grade copper sulphide ores bearing chalcopyrite, chalcocite and covellite. Bioleaching can be applied to various ore types through microbial generation of leach agents. There is a need for a dynamic reactor model in order to improve. Bioleaching definition of bioleaching by the free dictionary. Determining the bioleaching ability, ph and fungal biomass after incubation, fungal mycelium was separated from the culture medium by vacuum filtration and dried at. Vegetable oil extraction to separate the desired solute constituent or remove an undesirable solute component from solid phase. Ppt to video converter free download download conversion. Get the students to arrange the cards onto a3 paper and annotatebuild a flow chart. Heap bioleaching of ores a rapidly developing technology undoubtedly, heap bioleaching has had a considerably bigger impact on the base metal industry than tank bioleaching. Download this books into available format unlimited. Bioleaching accessscience from mcgrawhill education. In recent years, a new discipline of mineral science namely biohydrometallurgy. It is currently the highest producing copper mine in the world.
If so, share your ppt presentation slides online with. Bioleaching of nickel from spent petroleum catalyst using acidithiobacillus thiooxidans dsm 11478. Nonsulfide ores and minerals can be treated by heterotrophic. Bioreactor process optimization for bioleaching of fine. The environmental consequences of mining and quarrying are vast, as highlighted in the mining section. The simapro lca software was used to estimate the ghg footprint of the isl of uranium, gold and copper. Bioleaching of nickel from spent petroleum catalyst using. Cards for pupils to create a flowchart on how pure copper is obtained from lowgrades ores via bioleaching and phytomining. Excel to pdf converter free download full version download pdf. An ebook reader can be a software application for use on a computer such. Objectives after the end of the presentation well know. The bioleaching performance of blank control bc, planktonic cell deficient pd. Specific mechanism of acidithiobacillus caldus extracellular. Ppt bioleaching powerpoint presentation, free download.
Leaching generally refers to the removal of a substance from a solid via a liquid extraction media. Description of the process and presentation of pilot. Bioleaching principles, mechanisms, and applications for extraction of zinc, nickel, and cobalt are illustrated. The economic importance of copper production in chile has prompted the study of new strategies for the optimal management of mineral resources, including processing of low grade ore and even processing tails processed ore. Energy efficient, using almost half as much energy as traditional extraction. Phytoming and bioleaching extraction of copper from ores bioleaching advantages we can use waste ores, reducing the impact of mining on the environment. Bio leaching group members mehwish nazeer, kanza saleem, nazish mehmood m. Rebgolds bioleaching process produces gold and other. 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. Introduction bioleaching is the simple and effective technology for metal extraction from low grade ores and mineral concentrate by the use of micro organisms. Bioleaching is one of several methods used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt bioleaching uses certain types of bacteria to produce a solution called a leachate. The bioleaching of the nodules was carried out in two different ways a leaching during the growth of the isolate and b leaching by spent liquor after removal of fully grown cells. Soilvision systems software features heap leach drainage design.
The bacterial oxidation of sulfide minerals permits biodissolution of metal ions of interest such as zinc from sphalerite and, copper from chalcopyrite, covellite, and chalcocite. The main driver for the development of technologies to extract metals from black. These include mineral formation, mineral degradation, sedimentation and geochemical cycling. In recent years, a new discipline of mineral science namely biohydrometallurgy or. 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. 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. Loading slideshow in 5 seconds bioleaching powerpoint presentation. We hope to have the first industrial and operational stages with this new technology running by early 2010, says ricardo badilla, biosigmas general manager. Apr 17, 2004 bioleaching definition is the extraction of valuable metals such as copper and gold from ores through the action of microorganisms such as bacteria.
Bioleaching of metal sulfides is caused by diverse groups of bacteria. Ppt integrated piloting of a thermophilic nickelcopper. Bioleaching is getting metals from their ores by using living organisms. Created using powtoon free sign up at youtube create animated videos and animated presentations for free. Leaching process by qaedi faiz on prezi presentation software. Application of bioleaching to copper mining in chile. An industrial bioleaching plant for the treatment of a refractory gold concentrate. Objectives after the end of the presentation well know biohydrometallurgy and its applications bioleaching microorganisms involved in bioleaching bioleaching process factors and parameters influencing bioleaching advantages and disadvantages of bioleaching bioleaching of some metals gold. Recent development has shown commercial application of the process and, concurrently, details pertaining to the key microorganisms involved in these processes have been described.
Thus, this fungal strain was only assessed in combination with a. Development of a mathematical model for continuous tank. In an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment weee, this research evaluated the bioleaching efficiency of gold au, copper cu and nickel ni by two strains of aspergillus niger in the presence of goldplated finger integrated circuits found in computer motherboards gficms and cellular phone printed circuit boards. Ppt bioleaching powerpoint presentation, free download id. Bioleaching of covellite from low grade copper sulphide. The dissolution biochemistry signifies two types of. Dump bioleaching has evolved into a commercially accepted option for bioheap copper leaching of highergrade, higher value ores. May 15, 20 the active presence of bioleaching microorganisms is essential to the copper extraction from sulphur ores, so the careful definition of operation conditions and their monitoring are critical in order to maintain the best condition to support microbial activity in the bioleaching system. Bioleaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. Find powerpoint presentations and slides using the power of, find free presentations research about copper bioleaching ppt. This is much cleaner than the traditional heap leaching using cyanide. The bacteria feed on nutrients in the minerals causing the metal to separate from its ore. Sirajudheen k v manikandan r 1rvch032 1rv15ch402 2.
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