WO2008032288A2 - Prétraitement d'alimentation vers un bioréacteur de surface non agité - Google Patents

Prétraitement d'alimentation vers un bioréacteur de surface non agité Download PDF

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Publication number
WO2008032288A2
WO2008032288A2 PCT/IB2007/053714 IB2007053714W WO2008032288A2 WO 2008032288 A2 WO2008032288 A2 WO 2008032288A2 IB 2007053714 W IB2007053714 W IB 2007053714W WO 2008032288 A2 WO2008032288 A2 WO 2008032288A2
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WO
WIPO (PCT)
Prior art keywords
solution
bioreactor
microbes
concentrate
microbial population
Prior art date
Application number
PCT/IB2007/053714
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English (en)
Other versions
WO2008032288A3 (fr
Inventor
Alan Eric Norton
Original Assignee
Geobiotics Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Geobiotics Llc filed Critical Geobiotics Llc
Priority to AU2007297152A priority Critical patent/AU2007297152A1/en
Priority to CA002664213A priority patent/CA2664213A1/fr
Priority to US12/441,479 priority patent/US20090235784A1/en
Priority to EA200970285A priority patent/EA200970285A1/ru
Priority to BRPI0716788-1A2A priority patent/BRPI0716788A2/pt
Priority to EP07826382A priority patent/EP2074234A2/fr
Priority to AP2009004832A priority patent/AP2009004832A0/xx
Priority to MX2009002827A priority patent/MX2009002827A/es
Publication of WO2008032288A2 publication Critical patent/WO2008032288A2/fr
Publication of WO2008032288A3 publication Critical patent/WO2008032288A3/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M1/00—Apparatus for enzymology or microbiology
    • C12M1/36—Apparatus for enzymology or microbiology including condition or time responsive control, e.g. automatically controlled fermentors
    • C12M1/38—Temperature-responsive control
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/18—Extraction of metal compounds from ores or concentrates by wet processes with the aid of microorganisms or enzymes, e.g. bacteria or algae
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M1/00—Apparatus for enzymology or microbiology
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/04—Obtaining noble metals by wet processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/08—Obtaining noble metals by cyaniding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • This invention relates to a process of pre-treatment of feeds to non-stirred surface bioreactors and a method of adapting a microbial population for use in a non-stirred surface heap leach bioreactor.
  • Some metal bearing solids usually flotation concentrates, do not respond favourably or quickly enough to bio-processing and poor bacterial activity, evidenced by low redox potential of the liquid phase, is normally a symptom of such problems.
  • micro-organisms During the adaptation of micro-organisms to specific concentrates, it has been observed that in some instances the micro-organisms either adapt very slowly, and in rare cases not at all, to the specific concentrate. This indicates that the leaching microbes are being subject to some toxic effect from compounds arising from the concentrate. This results in an extremely long lag phase before the microbe population can increase in number to high enough levels to oxidize the sulphides. This extends the leaching time of the process which reduces the economic benefits of the process.
  • the operation of a surface bioreactor typically includes the coating of a flotation concentrate onto a substrate (typically crushed and sized rock), stacking the coated rock into a heap and inoculating the heap with an inoculum, typically via the irrigation of recycled heap effluent. Inoculation by this method is inefficient due to the natural stickiness of microbes giving rise to low penetration rates of microbes through the heap and the low solution application rates used, typically around 20l/m 2 /hour.
  • the oxidized portion of the heap is taken down and the oxidised concentrate is washed off the rock.
  • the rock is frequently recycled and coated with fresh concentrate.
  • the oxidised concentrate is then thickened and, for refractory gold operations, the thickened oxidised concentrate being processed using cyanidation to recover the gold. Such a process is frequently tested in columns in the laboratory.
  • a process for the pre-treatment of a feed to a non-stirred surface heap leach bioreactor which includes the step of applying in sequence first and second pre-treatment solutions to a feed to a non-stirred surface heap leach bioreactor, in which the first solution has an iron content greater than 5g/l and pH below 2, and the second solution contains a substantially higher microbial population.
  • the microbial population of the second solution to be selectively adapted relative to a heap PLS solution.
  • the process to include the addition of additional sulphuric acid concurrently with the iron rich first solution.
  • the second solution to comprise a solution from a dewatering step of oxidised product from the non-stirred surface bioreactor, and for the iron rich first solution to comprise a re-circulating irrigation solution from a non-stirred surface bioreactor process.
  • the microbial population of the second solution to have been enriched and adapted in an inoculum generator which has been charged with concentrate, sulphur or other material to selectively increase the population of specific microbes in the solution.
  • the microbial population of the second solution to contain microbes from an inoculum generator of which the temperature is operated in a predeterminable temperature range to increase the population of specific microbes in the solution.
  • the solution with the adapted microbial population content to contain microbes from an inoculum generator which is fed with concentrate to select microbes most suitable for specific toxic compounds contained in the concentrate.
  • the invention further provides for a method of adapting a microbial population for use in a non-stirred surface heap leach bioreactor which includes a microbe selection step in which a solution which contains the microbes is passed through an inoculum generator which is fed with concentrate to select microbes most adapted for specific toxic compounds contained in the concentrate in the non-stirred surface heap leach bioreactor, an inoculum generator which is fed with a sulphur species to select microbes most suitable for sulphur oxidation in the non-stirred surface heap leach bioreactor, further alternatively an inoculum generator which is operated in a specific temperature range to selectively favour a specific microbe most suitable for the temperature operating regime used in the bioreactor in the non-stirred surface heap leach bioreactor.
  • a microbe selection step in which a solution which contains the microbes is passed through an inoculum generator which is fed with concentrate to select microbes most adapted for specific toxic compounds contained in the concentrate in the non-sti
  • Figure 1 shows an embodiment of the invention for processing of a toxic gold bearing arsenopyritic concentrate, containing substantial carbonate mineralization and a tendency to produce elemental sulphur during the bio-oxidation process;
  • Figure 2 shows another embodiment of the invention for processing a pyritic gold bearing concentrate with minor carbonate and stibnite that shows minor toxicity in laboratory amenability tests.
  • bioleaching microbes excrete exopolymers and are "sticky" in their natural state.
  • inoculation of a surface bioreactor using irrigation solution results in slow penetration of bacteria in the heap, also increasing period before leaching begins efficiently.
  • the natural growth of the leaching microbes that have penetrated the heap will be further inhibited by any toxic compounds coming into the solution phase.
  • Flotation concentrates processed using surface bioreactors are usually coated, as thickened slurry from a flotation plant, onto the rock.
  • the concentrate may be filtered or dried, re-pulped with water, and then coated onto the rock.
  • the density of the concentrate pulp is an important factor in maintaining adherence of the concentrate to the rock.
  • the concentrate could be re-pulped to the correct density with inoculum (for example re- circulating PLS solution), however any toxic compounds would be stacked along with the concentrate.
  • improved bacterial activity in the stacked heaps can be achieved by pre-treating the flotation concentrate with an acidic solution of ferric sulphate containing substantial quantities of leaching microbes, in one or more pre-treatment reactors.
  • the quantity of leaching microbes available for leaching is improved in situ as the coated rock is stacked. If the heap is inoculated using irrigation solution and that solution contains 1 x10 6 microbes per ml, some 7.7x10 6 microbes would be applied per g of concentrate in the 27 day period. Whilst the microbial population would normally naturally increase, such increase in population will be substantially inhibited in the presence of any toxic compounds present in the solution. Also given the low solution application rates in heaps, such effects are likely to persist with time. Using the pre-treatment reactor about 1 x10 7 microbes can contacted with a gram of concentrate every hour. Again though, any toxic compounds will remain in solution.
  • a third and indirect benefit is that mixing of a large volume of solution with the concentrate requires that the resulting product be dewatered using a thickener and/or filter. Such a process step provides an opportunity to bring the concentrate from the flotation plant consistently to the correct pulp density, which is a very important factor in maintaining adherence of the concentrate to the rock.
  • any toxic compounds are diluted substantially and, coupled with the dewatering step above, a large proportion of any soluble toxic compounds associated with the liquid phase may be removed and immediately discarded. Additionally the concentration of toxic compounds in the liquid phase of the coating on the rock is reduced directly prior to stacking.
  • the fifth benefit is that many flotation concentrates contain acid consuming carbonate minerals. These carbonates may be removed with sulphuric acid and concentrated sulphuric acid is usually used for this.
  • sulphuric acid to a carbonate containing concentrate usually results in severe foaming and expansion of the slurry, which presents practical difficulties.
  • the addition of large solution volumes enables concentrated sulphuric acid to be mixed into the slurry without concerns of foaming.
  • the acid generated in the PLS by bioleaching pyrite in the concentrate can be put to use. Additionally, because the carbonate is removed upfront, the pH in the PLS drops quickly to that suitable for bioleaching, reducing the required time on the leach pad.
  • the acidic solution of ferric sulphate containing substantial quantities of leaching microbes may be tailored for specific applications by judicious use of available plant solutions.
  • the inventors have observed that the re-circulating irrigation solution usually has quite a high population of microbes typically around 1 x10 6 per ml and is enriched in iron, typically 5-40g/l Fe with a pH of about 1 .5.
  • the overflow from the reclaim thickener that dewaters the oxidised concentrate
  • microbes from the reclaim thickener overflow have been washed off the heap mass and are likely more adapted to conditions within the heap, whereas those in the irrigation solution may not.
  • the type and quantity of leaching microbes and iron content of the solution phase in the pre-treatment steps may be tuned for a specific concentrate. Additional sulphuric acid may be added as appropriate to dissolve carbonate minerals.
  • irrigation solution and/or the reclaim thickener overflow solution may have their microbe content enriched by a microbe selection step.
  • the inoculum generator may be fed using other materials (for example sulphur) to select the population of a particular microbial species that has the desired genetic trait for example sulphur metabolism.
  • it may be operated in a specific temperature range, to increase the population of a desired microbe (for example extreme thermophiles, by operating at >60 Deg C). It may also be possible to use a combination of feeding small amounts of concentrate to the inoculum generator and operating it in specific temperature range to select the most suitable microbe.
  • Figure 1 shows a surface bioreactor flowsheet for the treatment of the gold bearing arsenopyrite concentrate showing severe toxicity in laboratory tests, with major carbonate content.
  • the oxidised concentrate has high levels of elemental sulphur.
  • a bleed stream (120a) from the irrigation solution pond (120) is mixed with the incoming flotation concentrate (1 ) in a first pre-treatment reactor (30), to which 10Okg/t of sulphuric acid (31 ) is added.
  • the leached solids (30b) are fed to a pre-treatment thickener (40).
  • the pre-treatment thickener overflow (40a) goes to neutralisation (60) and disposal.
  • the pre- treatment thickener underflow (40b) is fed to a second pre-treatment reactor (50), where a solution (100d) from an inoculum generator (130) fed with sulphur (130a) and a bleed (100b) of the oxidized concentrate thickener overflow (100a) is added.
  • the second pre-treatment reactor product (50b) goes to a coating device (70) along with recycled support rock (200).
  • the coated support rock (70a) is fed to the surface bioreactor heap (80).
  • the surface bioreactor heap (80) is continuously irrigated with solution (120a) derived from the irrigation solution pond (120).
  • the heap effluent solution (80a) flows back to the irrigation solution pond (120).
  • Low pressure air (1 17a) is blown through the heap surface bioreactor (80).
  • the oxidised portion (80b) of the surface bioreactor heap (80) is removed and fed into an oxidized concentrate screen (90).
  • the washed support rock (200) is fed to the coating device (70).
  • the oxidized fines (90b) are fed to an oxidized concentrate thickener (100) from which the thickener underflow (100d) is further processed using cyanidation to recover the gold.
  • the oxidized concentrate thickener overflow (100a) is split into a portion (100c) going to the solution pond (120) and a bleed portion (100b) going to an inoculum generator (130) fed with elemental sulphur (130a).
  • Figure 2 shows a surface bioreactor flowsheet for the treatment of the gold bearing pyrite concentrate, with minor carbonate and stibnite content.
  • a bleed stream (25a) from the irrigation solution pond (25) is mixed with the incoming flotation concentrate (21 ) in a first pre-treatment reactor (22), to which some sulphuric acid (23) is added.
  • the leached solids (26) are fed to a second pre-treatment reactor (26a), where a bleed (27) of the oxidized concentrate thickener overflow (28a) is added.
  • the second pre-treatment reactor product (29) is thickened in a pre-treatment thickener (29a).
  • the pre-treatment thickener overflow (29b) goes to neutralisation (1 1 ) and disposal.
  • the pre-treatment thickener underflow (12) is fed to a coating device (13) along with recycled support rock (20).
  • the coated support rock (14) is fed to the surface bioreactor heap (15).
  • the surface bioreactor heap (15) is continuously irrigated with solution (17) derived from the irrigation solution pond (25).
  • the heap effluent solution (16) flows back to the irrigation solution pond (25).
  • Low pressure air (17a) is blown through the heap surface bioreactor (15).
  • the oxidised portion (18) of the surface bioreactor heap (15) is removed and fed into an oxidized concentrate screen (19).
  • the washed support rock (20) is fed to the coating device (13).
  • the oxidized fines (21 ) are fed to an oxidized concentrate thickener (28) from which the thickener underflow (28b) is further processed using cyanidation to recover the gold.
  • the oxidized concentrate thickener overflow (28a) is split into a portion (22a) going to the solution pond (25) and a bleed portion (27) going to the second pre-treatment reactor (26a).
  • the invention can be used for the processing of base metal concentrates, as well as in all cases where ore may be used as the substrate. It is also possible to use the invention in stirred tank processing of gold and base metal concentrates.
  • a thickener in the process before the coating step, which may be required to increase the solids content of the material to be coated on the feed to the bioreactor.
  • a thickener could be located between Pre- treatment Reactor 2 (50) and the Coating step (70), in other words in stream 50b.

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  • Chemical & Material Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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  • Manufacture And Refinement Of Metals (AREA)
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Abstract

L'invention concerne un procédé pour le prétraitement d'alimentation vers un bioréacteur de lixiviation en tas de surface non agité par l'application en séquence de première et seconde solutions de prétraitement à une alimentation vers un bioréacteur de lixiviation en tas de surface non agité, la première solution ayant une teneur en fer supérieure à 5 g/l et un pH inférieur à 2, et la seconde solution contenant une population microbienne sensiblement supérieure. L'invention concerne en outre des procédés pour adapter une population microbienne à une utilisation dans un bioréacteur de lixiviation en tas de surface non agité.
PCT/IB2007/053714 2006-09-15 2007-09-14 Prétraitement d'alimentation vers un bioréacteur de surface non agité WO2008032288A2 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
AU2007297152A AU2007297152A1 (en) 2006-09-15 2007-09-14 Pre-treatment of feed to non-stirred surface bioreactor
CA002664213A CA2664213A1 (fr) 2006-09-15 2007-09-14 Pretraitement d'alimentation vers un bioreacteur de surface non agite
US12/441,479 US20090235784A1 (en) 2006-09-15 2007-09-14 Pre-treatment of feed to non-stirred surface bioreactor
EA200970285A EA200970285A1 (ru) 2006-09-15 2007-09-14 Предварительная обработка сырья, поступающего в поверхностный биореактор без перемешивания
BRPI0716788-1A2A BRPI0716788A2 (pt) 2006-09-15 2007-09-14 Processo de pré-tratamento de carga para biorreator de lixiviação de sobrecarga de superfície não agitada e métodos de adaptação de população microbiana para uso no mesmo.
EP07826382A EP2074234A2 (fr) 2006-09-15 2007-09-14 Prétraitement d'alimentation vers un bioréacteur de surface non agité
AP2009004832A AP2009004832A0 (en) 2006-09-15 2007-09-14 Pre-treatment of feed to non-stirred surface bioreactor
MX2009002827A MX2009002827A (es) 2006-09-15 2007-09-14 Pre-tratamiento de alimentacion para biorreactor de superficie no agitada.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200608006 2006-09-15
ZA2006/08006 2006-09-15

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WO2008032288A2 true WO2008032288A2 (fr) 2008-03-20
WO2008032288A3 WO2008032288A3 (fr) 2008-05-29

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PCT/IB2007/053714 WO2008032288A2 (fr) 2006-09-15 2007-09-14 Prétraitement d'alimentation vers un bioréacteur de surface non agité

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US (1) US20090235784A1 (fr)
EP (1) EP2074234A2 (fr)
KR (1) KR20080025353A (fr)
AP (1) AP2009004832A0 (fr)
AR (1) AR062872A1 (fr)
AU (1) AU2007297152A1 (fr)
BR (1) BRPI0716788A2 (fr)
CA (1) CA2664213A1 (fr)
CL (1) CL2007002706A1 (fr)
EA (1) EA200970285A1 (fr)
EC (1) ECSP099237A (fr)
MX (1) MX2009002827A (fr)
PE (1) PE20080518A1 (fr)
UY (1) UY30597A1 (fr)
WO (1) WO2008032288A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2467081C1 (ru) * 2011-07-01 2012-11-20 Сергей Юрьевич Абрамовский Колонна для регенерации железоокисляющими микроорганизмами растворов выщелачивания минерального сырья

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010025096A1 (fr) 2008-08-25 2010-03-04 Freeport-Mcmoran Corporation Procédés et systèmes pour la lixiviation d’un minerai métallifère pour la récupération d’une valeur métallique

Citations (6)

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US5089412A (en) * 1987-07-10 1992-02-18 Gb Biotech Inc. Bacteria for oxidizing multimetallic sulphide ores
RU2011691C1 (ru) * 1991-05-05 1994-04-30 Уральский научно-исследовательский и проектный институт медной промышленности "УНИПРОМЕДЬ" Установка для биохимического выщелачивания руд
US5914441A (en) * 1996-06-12 1999-06-22 Yellowstone Environmental Science, Inc. Biocatalyzed anaerobic oxidation of metal sulfides for recovery of metal values
US6096113A (en) * 1997-05-16 2000-08-01 Echo Bay Mines, Limited Integrated, closed tank biooxidation/heap bioleach/precious metal leach processes for treating refractory sulfide ores
US6884280B2 (en) * 2000-10-06 2005-04-26 Billiton Sa Limited Heat transfer in heap leaching of sulphide ores
EP1785497A2 (fr) * 2005-11-09 2007-05-16 Boliden Mineral AB Méthode de biolixiviation de matériaux sulfuriques contenant du métal

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US5766930A (en) * 1995-06-02 1998-06-16 Geobiotics, Inc. Method of biotreatment for solid materials in a nonstirred surface bioreactor

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US5089412A (en) * 1987-07-10 1992-02-18 Gb Biotech Inc. Bacteria for oxidizing multimetallic sulphide ores
RU2011691C1 (ru) * 1991-05-05 1994-04-30 Уральский научно-исследовательский и проектный институт медной промышленности "УНИПРОМЕДЬ" Установка для биохимического выщелачивания руд
US5914441A (en) * 1996-06-12 1999-06-22 Yellowstone Environmental Science, Inc. Biocatalyzed anaerobic oxidation of metal sulfides for recovery of metal values
US6096113A (en) * 1997-05-16 2000-08-01 Echo Bay Mines, Limited Integrated, closed tank biooxidation/heap bioleach/precious metal leach processes for treating refractory sulfide ores
US6884280B2 (en) * 2000-10-06 2005-04-26 Billiton Sa Limited Heat transfer in heap leaching of sulphide ores
EP1785497A2 (fr) * 2005-11-09 2007-05-16 Boliden Mineral AB Méthode de biolixiviation de matériaux sulfuriques contenant du métal

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Title
BRIERLEY J A: "Response of microbial systems to thermal stress in biooxidation-heap pretreatment of refractory gold ores" HYDROMETALLURGY, ELSEVIER SCIENTIFIC PUBLISHING CY. AMSTERDAM, NL, vol. 71, no. 1-2, October 2003 (2003-10), pages 13-19, XP004463169 ISSN: 0304-386X *
SUZUKI I: "Microbial leaching of metals from sulfide minerals" BIOTECHNOLOGY ADVANCES, ELSEVIER PUBLISHING, BARKING, GB, vol. 19, no. 2, 1 April 2001 (2001-04-01), pages 119-132, XP004240664 ISSN: 0734-9750 *
YAHYA A ET AL: "Bioleaching of pyrite at low pH and low redox potentials by novel mesophilic Gram-positive bacteria" HYDROMETALLURGY, ELSEVIER SCIENTIFIC PUBLISHING CY. AMSTERDAM, NL, vol. 63, no. 2, February 2002 (2002-02), pages 181-188, XP004336038 ISSN: 0304-386X *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2467081C1 (ru) * 2011-07-01 2012-11-20 Сергей Юрьевич Абрамовский Колонна для регенерации железоокисляющими микроорганизмами растворов выщелачивания минерального сырья

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UY30597A1 (es) 2008-05-02
KR20080025353A (ko) 2008-03-20
AR062872A1 (es) 2008-12-10
US20090235784A1 (en) 2009-09-24
AP2009004832A0 (en) 2009-04-30
CL2007002706A1 (es) 2008-05-16
EP2074234A2 (fr) 2009-07-01
MX2009002827A (es) 2009-06-04
ECSP099237A (es) 2009-06-30
AU2007297152A1 (en) 2008-03-20
CA2664213A1 (fr) 2008-03-20
BRPI0716788A2 (pt) 2014-02-25
EA200970285A1 (ru) 2009-08-28
PE20080518A1 (es) 2008-05-28
WO2008032288A3 (fr) 2008-05-29

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