CN101982551A - Method for resource recovery of valuable metals on waste plasma display panel (PDP) glass by utilizing microorganisms - Google Patents
Method for resource recovery of valuable metals on waste plasma display panel (PDP) glass by utilizing microorganisms Download PDFInfo
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Abstract
The invention discloses a method for resource recovery of valuable metals on waste plasma display panel (PDP) glass by utilizing microorganisms. The method comprises the following steps: smashing, domestication, pre-culturing, leaching and processing. In the method, Acidthiobacillus ferrooxidans, Leptospirillum ferrooxidans and other microorganisms are utilized to leach waste PDP glass asphalt so as to recycle Ag, Zn, Ni and other metals on the waste PDP glass; an environmental-friendly non-secondary pollution microorganism technology is adopted to recycle various metals on the waste PDP glass; the problem of recycling various valuable metals on the waste PDP glass can be solved by optimizing the technological parameters; and the operation is simple, and the operation cost is low, thus the method has the characteristics of generalization and application values.
Description
Technical field
The present invention relates to reclaim the method for discarded PDP valuable metal on glass, particularly utilize the method for the discarded PDP valuable metal on glass of Microbial resources recovery.
Background technology
Plasma TV is the main product that is only second to the liquid crystal TV set sales volume on the present Chinese market, and along with the raising of people's living standard, its usage quantity will be more and more higher.
Plasma TV is against plasma panel (Plasma Display Panel, hereinafter to be referred as PDP) carry out pictorial display, it is a kind of novel direct-viewing type image display device after liquid crystal display, it is to inject mixed gas between two ultrafine sheet glass, and applies the equipment that voltage utilizes the light-emitting phosphor imaging.The arriving in flat pannel display epoch, to domestic color TV enterprises be opportunity be again the challenge.Current, global various countries have listed the digitizing of realization Television programme in succession, close the plan of simulated television, and the PDP TV is about to welcome the huge market opportunity as one of optimal selection of digital display terminal.
From the market angle, along with being rooted in the hearts of the people of digital home's notion, large screen television must become human consumer's first-selection, the large screen television market of the whole world more than 40 inches, the PDP TV occupies absolute predominance, accounts for 67% market, and the domestic market is developed prior to the PDP TV owing to LCD TV, the sales volume of liquid crystal is better than plasma on the contrary, but the PDP predicament only occurs over just China, is the market mainstream at developed country's PDP TVs such as America and Europes.The famous market study Display Search of the mechanism investigation in the whole world shows that compared with the same period of last year the plasma first quarter in 2006 (PDP) TV whole world shipment amount has increased by 87%, reaches 1,700,000.Data show that also plasma still is in dominant position at 40 inches to 44 inches TV domains, and just progressively rise 50 inches to the 54 inches shared shares of TV domain.At present, positive popularization along with each producer, usage quantity at China's plasm TV is more and more higher, especially aspect large screen display, the PDP televisor have LCD incomparable display effect and price advantage, well below LCD factory, thereby the plasma TV share of market will be more and more higher in conjunction with the construction cost of PDP factory.But any electronic product always has its corresponding work-ing life, and the market owning rate is high more, and the amount that ultimate demand is scrapped increases year by year.
Discarded PDP mainly contains two sources: the one, and the discarded PDP that discarded plasma TV produced when work-ing life, end was scrapped; The 2nd, the PDP waste product that in producing the PDP process, produces.In China mainly is the PDP that Changhong Group produces, next is the PDP production base of the corresponding producer of Japan and Korea S in China, difference because of each manufacturer's production technology level, it produces the PDP rejection number and has nothing in common with each other, but the PDP waste product that manufacturer produces is one of main source of discarded PDP, is badly in need of otherwise effective technique and handles.
And plasm TV display screen (PDP) is made up of header board and back sheet glass, all contain multiple metal in the forward and backward sheet glass, higher with metal contents such as Ag, Mg, Zn, secondly take second place with metal contents such as Ni, Mn, Cr, this part master metal will be coated in the surface of PDP glass as electrode, is the core integral part that the plasm TV display screen is realized function.Thereby discarded PDP glass belongs to danger wastes, as direct discharging, will bring unforeseen long-term hazards to environment.And, as far as possible metal in the discarded PDP glass is carried out resource utilization in the more and more rare epoch of these Nonrenewable resources of metal, will be to solve rare, the not contaminated perfect adaptation of environment of metals resources.
But because of plasm TV is a product innovation on the market, the plasm TV amount of scrapping of generation is also lower, mainly from PDP manufacturer, but also has effective means to reclaim discarded PDP metal on glass to the concern of reclaiming metal in the discarded PDP glass.Therefore, the resource technology of discarded PDP metal on glass is still waiting research and development.
Summary of the invention
Technical problem to be solved by this invention is to discard the existing problems of plasma electric screen (PDP) glass treatment at a large amount of at present, and provides a kind of technology workable, with low cost, the eco-friendly method of utilizing the discarded PDP metal on glass of Microbial resourcesization.
Technical problem to be solved by this invention can be achieved through the following technical solutions:
A kind of method of utilizing the discarded PDP metal on glass of Microbial resourcesization, it comprises the steps:
1. pulverising step
The glass of discarded PDP is pulverized, be crushed to particulate matter less than 5mm;
2. strain domestication step
The first step domestication: will mainly contain thiobacillus ferrooxidant (Acidthiobacillus ferrooxidans), the little spirillum of iron protoxide (Leptospirillum ferrooxidans) (bacterial classification that hereinafter relates to or bacterium liquid all are meant both mixed bacteria liquids) is that main bacterium liquid 1ml is inoculated in the argentiferous substratum, substratum consists of (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4, 3g/L, K
2HPO
4: 0.5g/L, MgSO
47H
2O:0.5g/L, KCl:0.5g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 20～40g, the pH value is 1.5～2.5, the concentration of silver is 0.5～5g/L in the substratum; Culture condition is 28～35 ℃ of normal temperature, incubation time 3～5 days;
The domestication of second step: use the bacterial classification leaching after the first step is tamed to contain the Ag tinsel, the ability that continues domesticated strain tolerance higher concentration Ag and leach Ag, the amount that interpolation contains the Ag tinsel is increased to 5g/L gradually from 0.5g/L;
The 3rd step domestication: will be through the bacterial classification after the domestication of second step, inoculation 1ml bacterium liquid carries out the domestication of the 3rd step in the extra above-mentioned substratum that adds Ni, Zn, Ni, Zn concentration are 10g/L in the substratum, and culture condition is 28～35 ℃ of normal temperature, incubation time 3～5 days; Bacterial classification after the domestication is standby;
3. pre-culturing step
Bacterial classification after the domestication inserted in the overall plastic fermentor tank by 10% inoculum size of nutrient solution volume cultivate in advance, the consisting of of nutrient solution (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4, 3g/L, K
2HPO
4: 0.5g/L, MgSO
47H
2O:0.5g/L, KCl:0.5g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 20～40g, the pH value is 1.5～2.5, culture condition is 28～35 ℃ of normal temperature; Pre-cultivate when finishing that inoculum density is 10 in the control bacterium liquid
7～10
9Individual/ml;
4. leach step
Select for use cylindrical barrel that the PP material of high strength, wear-resisting scratch resistance makes as leaching vat, leave in the bottom of cylindrical barrel and to give off cinder notch, be provided with the leach liquor transfer port from the high 20cm in the bottom of cylindrical barrel place, the agitator motor that links to each other with speed regulator is equipped with at the top of cylindrical barrel, agitator arm is by the stainless steel agitator arm, and Resins, epoxy is coated on the surface; Nutrient solution is added in the cylindrical barrel, press mass ratio and drop into the discarded PDP glass particle pulverized at 1: 10, stir, when stirring, look and drop into varying in size of discarded PDP glass particle, regulate stirring velocity and be controlled at 80-240rpm/min while feeding intake; Press the above-mentioned pre-cultured bacterium liquid of nutrient solution volume 10% inoculation then and insert in the cylindrical barrel, leached 6-15 days at 28-35 ℃;
5. treatment step
From cylindrical barrel, shift out the leach liquor that contains leached mud and filter, get filtrate and leached mud, filtrate is carried out extracting-back extraction get-reduce high-purity Ag, Ni, the Zn of displacement acquisition; Concrete treatment process is: adopt 1-4mol/L oil thioether in organic phase to filtrate: water is 1: 1-1: extract Ag under 3 conditions, the organic phase of extraction back loading Ag is with 1-2mol/L (NH
4)
2SO
4The solution back extraction, solution NaBH after the back extraction
4Solution reduction can get silver powder, NaBH
4: the Ag mass ratio is 0.5-1: 1; Leach liquor behind the extraction silver adopts P204 extraction agent extraction Zn, and the quality of P204 extraction agent is the 10-30% of Zn quality, and the organic phase of extraction back loading Zn is used the sulphuric acid soln back extraction of 1-3mol/L, and strip liquor is at 400-700A/m
2Electrolysis can obtain the metal zinc metal sheet under the current density condition; Leach liquor behind extraction Ag and the Zn extracts Ni with naphthenic acid, and the naphthenic acid quality is the 20-40% of the leach liquor quality behind extraction Ag and the Zn, and the organic phase of extraction back loading Ni is used the sulphuric acid soln back extraction of 1-3mol/L, and strip liquor is at 200-300A/m
2Electrolysis can obtain metallic nickel under the current density condition; Extraction agent is got back in the extraction process and is reused through after the back extraction; The part raffinate is pumped back in the cylindrical barrel, uses repeatedly or the part raffinate is used for flushing through leached mud, and drip washing falls discard the residual trace metal of PDP glass surface, and leacheate is again in the blowback cylindrical barrel, continues on for leaching discarding PDP glass; When continuing to use repeatedly in raffinate and the leacheate blowback cylindrical barrel, press the 1%-10% inoculation bacterium liquid of withdrawing fluid volume at every turn.
Thiobacillus ferrooxidant of the present invention (Acidthiobacillus ferrooxidans), the little spirillum of iron protoxide bacterial classifications such as (Leptospirillum ferrooxidans) are that separation from the mud mixture sample of certain metal mining area accumulation copper scrap ore (association has silver) slag bottom of China, domestication obtain.
The present invention adopts the microbial technique of environmental friendliness, non-secondary pollution to reclaim discarded PDP Ag on glass, multiple metals such as Ni, Zn, can solve the resource utilization problem of discarded PDP multiple valuable metal on glass, and simple to operate, running cost is cheap, has application value.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is the process flow sheet of treatment step of the present invention.
Fig. 3 is the synoptic diagram that concerns between the leaching amount of Ag, Zn in the embodiment of the invention 3 and the extraction time.
Embodiment
The present invention is further described below in conjunction with drawings and Examples, but therefore do not limit the present invention in the described scope of embodiments.
Embodiment 1
Utilize the method for the discarded PDP metal on glass of Microbial resourcesization, it comprises the steps:
1, pulverising step
Sheet glass is pulverized through hammer mill earlier before the discarded PDP, and broken back sample sieves, and grade is all controlled less than 5mm.Metal content sees Table 1 in the particle of discarded PDP header board glass pulverizing back.
The discarded PDP header board glass of table 1 is pulverized metal content in the sample of back
2, strain domestication step
Thiobacillus ferrooxidant (Acidthiobacillus ferrooxidans), the little spirillum of iron protoxide bacterial classifications such as (Leptospirillum ferrooxidans) are that separation from the mud mixture sample of certain metal mining area accumulation copper scrap ore (association has silver) slag bottom of China, purifying obtain.
The first step domestication: preparation substratum, the composition of substratum (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4: 0.15g/L, K
2HPO
4: 0.05g/L, MgSO
47H
2O:0.05g/L, KCl:0.05g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 40g, the pH value is 2.5; The concentration of silver ions increases to 5g/L from 0.5g/L in the substratum.1ml is inoculated in the substratum with thiobacillus ferrooxidant (Acidthiobacillus ferrooxidans) bacterium liquid, and culture condition is 28～35 ℃ of normal temperature, incubation time 3～5 days;
The domestication of second step: use the bacterial classification leaching after the first step is tamed to contain the Ag tinsel, the ability that continues domesticated strain tolerance higher concentration Ag and leach Ag, the amount that interpolation contains the Ag tinsel is increased to 5g/L gradually from 0.5g/L;
The domestication of the 3rd step: will carry out the domestication of the 3rd step in the extra above-mentioned substratum that adds Ni, Zn through the bacterial classification inoculation after the domestication of second step, Ni, Zn concentration are 10g/L in the substratum, the composition of substratum (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4: 0.15g/L, K
2HPO
4: 0.05g/L, MgSO
47H
2O:0.05g/L, KCl:0.05g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 40g, the pH value is 2.5; Culture condition is 28～35 ℃ of normal temperature, incubation time 3～5 days; Bacterial classification after the domestication is standby;
3. pre-culturing step
Bacterial classification after the domestication inserted in the overall plastic fermentor tank cultivate in advance, the consisting of of nutrient solution (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4, 3g/L, K
2HPO
4: 0.5g/L, MgSO
47H
2O:0.5g/L, KCl:0.5g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 20～40g, the pH value is 1.5～2.5, culture condition is 28～35 ℃ of normal temperature; Cultivated 3 days, and pre-cultivated when finishing that inoculum density was 10 in the control bacterium liquid
8Individual/ml;
4. leach step
Select for use cylindrical barrel that the PP material of high strength, wear-resisting scratch resistance makes as leaching vat, leave in the bottom of cylindrical barrel and to give off cinder notch, be provided with the leach liquor transfer port from the high 20cm in the bottom of cylindrical barrel place, the agitator motor that links to each other with speed regulator is equipped with at the top of cylindrical barrel, agitator arm is by the stainless steel agitator arm, and Resins, epoxy is coated on the surface; Nutrient solution is added in the cylindrical barrel the consisting of of nutrient solution (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4, 3g/L, K
2HPO
4: 0.5g/L, MgSO
47H
2O:0.5g/L, KCl:0.5g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 20～40g, the pH value is 1.5～2.5;
Press the discarded PDP glass particle 1kg that pulverizes with 1: 10 the input of mass ratio of nutrient solution, stir while feeding intake, when stirring, look and drop into varying in size of discarded PDP glass particle, the adjusting stirring velocity is controlled at 80-240rpm/min; Then by with the nutrient solution volume ratio be that 10% amount is inoculated pre-cultured bacterium liquid in cylindrical barrel, leached 10 days at 28 ℃ of following constant temperature; After cultivating end, collected specimens 5ml, triplicate.When collected specimens can not in time be analyzed, place 4 ℃ of refrigerators to preserve earlier.
5. treatment step
From cylindrical barrel, shift out the leach liquor that contains leached mud and filter, get filtrate and leached mud, filtrate is carried out extracting-back extraction get-reduce high-purity Ag, Ni, the Zn of displacement acquisition.Concrete treatment process is: adopt 1-4mol/L oil thioether comparing (organic phase: be 1 water): 1-1: extract Ag under 3 conditions, the organic phase 1-2mol/L (NH of extraction back loading Ag to filtrate
4)
2SO
4The solution back extraction, solution NaBH after the back extraction
4(NaBH
4: Ag=0.5-1: 1) solution reduction can get silver powder; Leach liquor behind the extraction silver adopts the P204 extraction agent extraction Zn of 10-30% (mass ratio), and the organic phase of extraction back loading Zn is used the sulphuric acid soln back extraction of 1-3mol/L, and strip liquor is at 400-700A/m
2Electrolysis can obtain the metal zinc metal sheet under the current density condition; Leach liquor behind extraction Ag and the Zn is used the sulphuric acid soln back extraction of 1-3mol/L with the naphthenic acid extraction Ni of 20-40% (mass ratio), the organic phase of extraction back loading Ni, and strip liquor is at 200-300A/m
2Electrolysis can obtain metallic nickel under the current density condition.Extraction agent is got back in the extraction process and is reused through after the back extraction; The part raffinate is pumped back in the leaching vat, uses repeatedly or the part raffinate is used for flushing through leached mud, and drip washing falls discard the residual trace metal of PDP glass surface, and leacheate is again in the blowback cylindrical barrel, continues on for leaching discarding PDP glass; When continuing to use repeatedly in raffinate and the leacheate blowback cylindrical barrel, press the 1%-10% inoculation bacterium liquid of withdrawing fluid volume at every turn;
The testing process of present embodiment is as follows:
The back particle pulverized by discarded PDP header board glass and the leaching liquid sample is used chloroazotic acid (HCl: HNO earlier
3=3: 1) in 100ml long-neck triangular flask, digest 2h, behind the hot digestion, little heating Hui Rong behind the adding distil water.Again repeatedly, be transferred in the 20ml scale test tube constant volume with distilled water wash.Use the content of metals such as Ag, Ni, Zn in inductively coupled plasma emission spectrometer (ICP-AES) working sample immediately.
The result
As shown in table 2, discarded PDP header board glass is pulverized metal in the particulate samples of back after leaching all in various degree leaching, and wherein the leaching yield of Ag, Ni, Zn is respectively 43%, 86%, 53%.
The discarded PDP header board glass of table 2 is pulverized metal content in the sample of back
Embodiment 2
This embodiment utilizes the method for the discarded PDP metal on glass of Microbial resourcesization, and its pulverising step is that sheet glass behind the discarded PDP is pulverized through hammer mill earlier, and broken back sample sieves, and grade is all controlled less than 5mm.Sheet glass pulverizes that metal content sees Table 2 in the particle of back behind the discarded PDP.
The discarded PDP header board glass of table 2 is pulverized metal content in the sample of back
All the other steps are with embodiment 1.
The testing process of present embodiment is with embodiment 1.
The result
As shown in table 3, sheet glass is pulverized metal in the particulate samples of back in various degree leaching is all arranged behind the discarded PDP after leaching, and wherein the leaching yield of Ag, Ni, Zn is respectively 46%, 79%, 65%.
Sheet glass is pulverized metal content in the sample of back behind the discarded PDP of table 3
Embodiment 3
This embodiment utilizes the method for the discarded PDP metal on glass of Microbial resourcesization, and its pulverising step is that the forward and backward sheet glass of discarded PDP is pulverized through hammer mill earlier, and broken back sample sieves, and grade is all controlled less than 5mm.The particle that to discard then after the forward and backward sheet glass fragmentation of PDP leaches according to 1: 1 mixed of weight ratio.
All the other steps are with embodiment 1.
The testing process of present embodiment is with embodiment 1.
The result
As shown in Figure 3, along with time of metal in the discarded PDP glass sample of T.f bacterium leaching increases, the leaching amount of Ag, Zn raises gradually, during by the 9th day Ag, Zn concentration in solution be respectively 23.7,57.5mg.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (2)
1. a method of utilizing the discarded PDP metal on glass of Microbial resourcesization is characterized in that, comprises the steps:
1. pulverising step
The glass of discarded PDP is pulverized, be crushed to particulate matter less than 5mm;
2. strain domestication step
The first step domestication: will mainly contain thiobacillus ferrooxidant (Acidthiobacillus ferrooxidans), the little spirillum of iron protoxide (Leptospirillum ferrooxidans) is that main bacterial classification bacterium liquid 1ml is inoculated in the argentiferous substratum, substratum consists of (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4, 3g/L, K
2HPO
4: 0.5g/L, MgSO
47H
2O:0.5g/L, KCl:0.5g/L, Ca (NO
3) 2:0.01g/L, ferrous sulfate: 20～40g, the pH value is 1.5～2.5, the maximum concentration of silver is 5g/L in the substratum; Culture condition is 28～35 ℃ of normal temperature, incubation time 3～5 days;
The domestication of second step: use the bacterial classification leaching after the first step is tamed to contain the Ag tinsel, the ability that continues domesticated strain tolerance higher concentration Ag and leach Ag, the amount that interpolation contains the Ag tinsel is increased to 5g/L gradually from 0.5g/L;
The 3rd step domestication: will be inoculated in and carry out the domestication of the 3rd step in the extra above-mentioned substratum that adds Ni, Zn through the bacterium liquid 1ml that contains after the domestication of second step, Ni, Zn concentration be 10g/L in the substratum, and culture condition is 28～35 ℃ of normal temperature, incubation time 3～5 days; Bacterial classification after the domestication is standby;
3. pre-culturing step
The bacterium solution that contains after the domestication is inserted in the overall plastic fermentor tank by 10% amount and cultivates in advance, the consisting of of nutrient solution (amount of reagent that adds among every 1000ml): (NH
4)
2SO
4, 3g/L, K
2HPO
4: 0.5g/L, MgSO
47H
2O:0.5g/L, KCl:0.5g/L, Ca (NO
3)
2: 0.01g/L, ferrous sulfate: 20～40g, the pH value is 1.5～2.5, culture condition is 28～35 ℃ of normal temperature; Pre-cultivate when finishing that inoculum density is 10 in the control bacterium liquid
7～10
9Individual/ml;
4. leach step
Select for use cylindrical barrel that the PP material of high strength, wear-resisting scratch resistance makes as leaching vat, leave in the bottom of cylindrical barrel and to give off cinder notch, be provided with the leach liquor transfer port from the high 20cm in the bottom of cylindrical barrel place, the agitator motor that links to each other with speed regulator is equipped with at the top of cylindrical barrel, agitator arm is by the stainless steel agitator arm, and Resins, epoxy is coated on the surface; Nutrient solution is added in the cylindrical barrel, press mass ratio and drop into the discarded PDP glass particle pulverized at 1: 10, stir, when stirring, look and drop into varying in size of discarded PDP glass particle, regulate stirring velocity and be controlled at 80-240rpm/min while feeding intake; Press the above-mentioned pre-cultured bacterium liquid of nutrient solution volume 10% inoculation then and insert in the cylindrical barrel, leached 6-15 days at 28-35 ℃;
5. treatment step
From cylindrical barrel, shift out the leach liquor that contains leached mud and filter, get filtrate and leached mud, filtrate is carried out extracting-back extraction get-reduce high-purity Ag, Ni, the Zn of displacement acquisition; Concrete treatment process is: adopt 1-4mol/L oil thioether in organic phase to filtrate: water is 1: 1-1: extract Ag under 3 conditions, the organic phase of extraction back loading Ag is with 1-2mol/L (NH
4)
2SO
4The solution back extraction, solution NaBH after the back extraction
4Solution reduction can get silver powder, NaBH
4: the Ag mass ratio is 0.5-1: 1; Leach liquor behind the extraction silver adopts P204 extraction agent extraction Zn, and the quality of P204 extraction agent is the 10-30% of Zn quality, and the organic phase of extraction back loading Zn is used the sulphuric acid soln back extraction of 1-3mol/L, and strip liquor is at 400-700A/m
2Electrolysis can obtain the metal zinc metal sheet under the current density condition; Leach liquor behind extraction Ag and the Zn extracts Ni with naphthenic acid, and the naphthenic acid quality is the 20-40% of the leach liquor quality behind extraction Ag and the Zn, and the organic phase of extraction back loading Ni is used the sulphuric acid soln back extraction of 1-3mol/L, and strip liquor is at 200-300A/m
2Electrolysis can obtain metallic nickel under the current density condition; Extraction agent is got back in the extraction process and is reused through after the back extraction; The part raffinate is pumped back in the cylindrical barrel, uses repeatedly or the part raffinate is used for flushing through leached mud, and drip washing falls discard the residual trace metal of PDP glass surface, and leacheate is again in the blowback cylindrical barrel, continues on for leaching discarding PDP glass; When continuing to use repeatedly in raffinate and the leacheate blowback cylindrical barrel, press the 1%-10% inoculation bacterium liquid of withdrawing fluid volume at every turn.
2. the method for utilizing the discarded PDP metal on glass of Microbial resourcesization as claimed in claim 1, it is characterized in that thiobacillus ferrooxidant (Acidthiobacillus ferrooxidans), the little spirillum of iron protoxide (Leptospirillum ferrooxidans) bacterial classification are that separation from the mud mixture sample of certain metal mining area accumulation copper scrap ore (association has silver) slag bottom of China, purifying obtain.
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