CN104630467A - Biological contact oxidation pond and method for oxidizing Fe<2+> in dump leaching process - Google Patents
Biological contact oxidation pond and method for oxidizing Fe<2+> in dump leaching process Download PDFInfo
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- CN104630467A CN104630467A CN201310565584.2A CN201310565584A CN104630467A CN 104630467 A CN104630467 A CN 104630467A CN 201310565584 A CN201310565584 A CN 201310565584A CN 104630467 A CN104630467 A CN 104630467A
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- 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
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Abstract
The invention discloses a biological contact oxidation pond and a method for oxidizing Fe<2+> in a dump leaching process. The biological contact oxidation pond comprises a ferrous oxidation tank, wherein a support is arranged in the ferrous oxidation tank, a microbial carrier is arranged on the support, and an aeration pipeline is arranged at the bottom of the ferrous oxidation pond. According to the biological contact oxidation pond and the method for oxidizing the Fe<2+> in the dump leaching process, in the ferrous oxidation tank, microbes adsorbed by the microbial carrier are taken as a main body, the microbes are promoted to efficiently oxidizing Fe<2+> to generate Fe<3+> in the biological contact oxidation tank by aerating and controlling appropriate temperature, pH and nutritional conditions, high microbial activity in a dump leaching system and high oxidation reduction potential in solution are realized, and oxidation efficiency of sulphide ore is improved.
Description
Technical field
The present invention relates to biological metallurgy field, particularly, the present invention relates to a kind of for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation and method.
Background technology
In biological heap leaching process, in heap leaching system, the upgrowth situation of acidophilic microorganism directly has influence on Fe
2+be oxidized to Fe
3+ability.But due to bad environments in heap leaching system, nutrition and oxygen deficiency, the microbe population in the heap of ore deposit and limited activity, to Fe
2+dysoxidation, have impact on oxygenant Fe
3+regeneration, and then to practical application effect produce extreme influence.The research in early stage proves, the rate of oxidation of sulphide ores is mainly subject to the impact of dissolved oxygen, redox potential and microorganism active in the heap of ore deposit.When without enough microorganism activies, in system, ferro element is mainly with Fe
2+form exist, at this moment electronics transfers to Fe from sulfide
3+and be translated into Fe
2+if microorganism active is sufficient, Fe in the presence of iron-oxidizing bacterium
2+again Fe can be converted into
3+, leaching process can be continued, otherwise, Fe
3+consumption will cause Fe in solution
2+occupy an leading position, thus leaching is interrupted.Pyritous dissolving needs higher redox potential, if Fe
2+dysoxidation, be less than 800mV(vs SHE in redox potential, lower with) time, oxidation rate is slower.
Microorganism active depends on the content of pH in heap leaching system, temperature, dissolved oxygen and nutritive substance.Current production practice are mainly attempted improving addicted to the activity of sour iron sulfur oxidizing bacterium to improve the leaching efficiency of sulphide ores in the heap of ore deposit, as attempted improving microbic activity by modes such as bottom ventilations in patent CN1509341 in ore deposit is piled.But according to the growth characteristics of ore deposit heap characteristic sum addicted to sour iron-oxidizing bacterium, the growing environment (dissolved oxygen, nutritive substance etc.) being difficult to regulating and controlling microbial and optimizing is compared in the heap of ore deposit, and to pile optimum leaching condition not identical condition needed for microorganism growth and ore deposit, be difficult to the amount reproduction growth and the Fe that realize microorganism
2+efficient oxidation, be difficult to realize redox potential high in system, and if to solve microorganism active problem from out-pile more feasible.Biological contact oxidation pond can well control the every suitable environment condition needed for microorganism growth, realize microorganism rapidly and raised growth breed, as in sewage disposal, utilize the raised growth of heterotrophic microorganism in biological contact oxidation pond, degradation of organic substances matter, realizes Water warfare (as patent CN101481173, CN101643272).For the envrionment conditions in biological heap leaching process required for autotrophic microorganism growth, design suitable biological contact oxidation pond, realize addicted to the optimized growth conditions of sour iron-oxidizing bacterium at ore deposit out-pile, thus realize microbic activity raising and Fe in heap leaching system
2+successional efficient oxidation, is of great significance for bio-oxidation efficiency tool in raising dump leaching.
Summary of the invention
The object of this invention is to provide a kind of for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation and method, by improving concentration and the activity of microorganism in heap leaching system in out-pile biological contact oxidation pond, promote Fe
2+oxidation, improve the redox potential of spray liquid, realize redox potential higher in heap leaching system and microbial biomass, realize the efficient oxidation of dump leaching mineral, save production cost.
For achieving the above object, present invention employs following technical scheme:
A kind of for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation, described biological contact oxidation pond comprises ferrous oxidation pond 4, arranges support 7 in ferrous oxidation pond 4, support 7 is arranged microbe carrier 6, arranges aerating pipelines 5 at the bottom of pond.
The volume in described ferrous oxidation pond 4 is 1000-50000 cubic meter, degree of depth 1-10 rice.
Described microbe carrier 6 is loaded in nylon net bag, hangs on support 7, is positioned over ferrous oxidation pond 4 median water level less than 1/3rd.Such guarantee can extract the solution of 2/3 volume in pond at every turn, ensures that carrier is not exposed to outside solution simultaneously.
The volume of described microbe carrier 6 accounts for the 2%-20% of ferrous oxidation pond volume.
Described microbe carrier 6 is one or more in gac, porous ceramic grain, rejected ore, zeolite, also can select suitable biological adsorption material according to local actual environment and material cost.
In the present invention, at the bottom of pond, ferrous oxidation pond, lay aerating pipelines 5, carry out aeration, described aerating pipelines 5 arranges aeration head 9.
Present invention also offers one based on above-mentioned for Fe in heap leaching process
2+the heap leaching method of the biological contact oxidation pond of oxidation, said method comprising the steps of:
1) derive from local sulfide ore stack leach liquor or acid wastewater in mine addicted to sour iron-oxidizing bacterium enlarged culturing in ferrous oxidation pond, contact 24-72 hour with microbe carrier, be fixed on microbe carrier addicted to sour iron-oxidizing bacterium absorption;
2) expose to the sun into air by aerating pipelines at the bottom of ferrous oxidation pond, make dissolved oxygen concentration in ferrous oxidation pond reach 4-7mg/L, for providing oxygen addicted to sour iron-oxidizing bacterium growth;
3) ore deposit heap leach liquor or acid wastewater in mine pass in ferrous oxidation pond, and are oxidized 24-72 hour in ferrous oxidation pond, and after in pond, the redox potential of solution is more than or equal to 850mV, the solution extracted in pond is used as ore deposit heap spray liquid;
4) supplement with ore deposit heap leach liquor or acid wastewater in mine the solution lost in ferrous oxidation pond again, continue Oxidation of Fe
2+, be used further to ore deposit heap spray liquid, move in circles to ore deposit heap oxidation complete.
The present invention is inoculated in and microbe carrier is generally the mixed bacterium such as thiobacillus ferrooxidant, iron protoxide hook end spirobacteria addicted to sour Fe forms microorganism.Initial period, mixed strains is enrichment culture from dump leaching leach liquor, local acid wastewater in mine, enlarged culturing in biological contact oxidation pond.Generally choosing for concentration of iron in the dump leaching leach liquor of enriched microorganism or acid waste water is 1 ~ 10g/L, pH value 1.5 ~ 2.5, containing addicted to sour Fe forms microorganism.The enrichment medium of bacterial classification is 9K substratum ((NH
4)
2sO
43g/L, K
2hPO
40.5g/L, KCl0.1g/L, MgSO
40.5g/L, Ca (NO
3)
20.01g/L), 10g/L FeSO is added
4, pH1.0-2.5.
In the present invention, in biological contact oxidation pond, add the nutrition needed for microorganism growth, in whole process, make (NH in pond
4)
2sO
4concentration reaches 1-3g/L, K
2hPO
4concentration reaches 0.2-0.5g/L, and KCl concentration reaches 0.02-0.1g/L, MgSO
4concentration reaches 0.2-0.5g/L, Ca (NO
3)
2concentration reaches 0.005-0.01g/L, and in bacterium liquid, microorganism concn finally reaches 10
7-10
8individual/mL.
In the present invention, biological contact oxidation pond temperature controls, at 30 DEG C ~ 40 DEG C, to note the insulation of biological contact oxidation pond when winter temperature is low, notes heat radiation summer.
In the present invention, when ore deposit, heap pH of leaching solution is less than 1.5, or Fe
3+when concentration is greater than 25g/L, make its pH value to 1.5 ~ 2.0 with limestone vegetation, Fe
3+concentration is less than 20g/L, then enters biological contact oxidation pond.
The present invention is in order to solve the interior microorganism Fe of heap in sulphide ores heap leaching process
2+the problem that oxidation efficiency is low, takes the mode of biological contact oxidation pond.By arranging microbe carrier in ferrous oxidation pond, at the bottom of pond, carrying out aeration, controlling suitable microorganism growth condition (comprising temperature, pH and nutritive substance etc.), to realize in heap leaching process Fe in biological contact oxidation pond
2+quick Oxidation, be specially adapted to promote pyritous dump leaching preoxidation, the biological pre-oxidation of such as auriferous pyrite and utilize discarded ore deposit heap to produce acid to be used for dump leaching spray liquid etc.
Beneficial effect of the present invention is as follows:
1) in the heap of ore deposit, be usually difficult to the Fe of regulating and controlling microbial
2+oxidation, but in out-pile more simple and effective adjustment microorganism optimized growth condition, Fe can be realized by present method
2+efficient oxidation, accelerating oxidation agent Fe
3+regeneration;
2) in heap leaching system, adopt the present invention can realize the spray liquid of noble potential (>850mV), improve the redox potential in whole system, be conducive to the dissolving of sulphide ores;
3) a large amount of in biological contact oxidation pond microorganisms, nutritive substance, dissolved oxygen can enter into ore deposit heap by spray, also improve microorganism active and mineral oxide speed in the heap of ore deposit simultaneously;
4) a large amount of microorganism that in biological contact oxidation pond, microbe carrier adsorbs, can continue to ensure newly entering the efficient oxidation capacity of solution;
5) present invention process is simple, and cost-saving, process parameter easily controls.Do not need to carry out large adjustment to heap leaching system, utilize the existing solution pool of heap leaching system to transform a little and can complete.
Accompanying drawing explanation
Fig. 1 is the heap leaching method schematic flow sheet adopting biological contact oxidation pond of the present invention;
Fig. 2 is structural representation support of the present invention being arranged microbe carrier;
Fig. 3 is the structural representation of aerating pipelines of the present invention;
Fig. 4 is the embodiment of the present invention 1 concrete technology schema;
Fig. 5 is comparative example 1 concrete technology schema of the present invention;
Fig. 6 is the embodiment of the present invention 2 concrete technology schema;
Reference numeral: 1, ore deposit heap; 2, liquid pool is leached; 3, pump; 4, ferrous oxidation pond; 5, aerating pipelines; 6, microbe carrier; 7, support; 8, qualified liquid pool; 9, aeration head.
Embodiment
With the drawings and specific embodiments, the present invention is further detailed explanation below.
As shown in Figure 1, biological contact oxidation pond of the present invention is used in heap leaching system, this system can comprise ore deposit heap 1, leach liquid pool 2, pump 3, ferrous oxidation pond 4, aerating pipelines 5, microbe carrier 6, support 7, qualified liquid pool 8.Its specific works flow process can be drawn in ferrous oxidation pond 4 by pump 3 for the ore deposit heap leaching solution leached in liquid pool 2, by biological contact oxidation pond addicted to sour iron-oxidizing bacterium Oxidation of Fe
2+, when in biological contact oxidation pond, solution oxide reduction potential (Eh) is greater than 850mV, extract solution in pond 2/3 enters in qualified liquid pool 8, then it can be used as ore deposit to pile the spray liquid of 1.
Embodiment 1
Very large one is had to be pyrite trapping gold in difficult-treating gold mine, but because pyritous Biooxidation Rate is fast not, this part gold is difficult to effectively be exposed, cause Heap leaching effectiveness not high, production cycle is long, so improve pyritous oxidation efficiency for enhancing productivity, reduce production cost significant.
In the biological dump leaching preoxidation commerical test of certain low-grade intractable gold mine (technical process is as Fig. 4), ore sulfur-bearing 5.3%, arsenic 0.2%, gold grade 2.3g/t.Ore reduction is less than 20mm to granularity, constructs auriferous pyrite leaching heap, ore deposit stack height 10 meters.At the dump leaching initial stage, from local acid waste water, enrichment culture is addicted to sour iron-oxidizing bacterium group (medium component: 9K, 10g/L FeSO
4, pH1.8), mainly comprise iron protoxide hook end spirobacteria and thiobacillus ferrooxidant etc.Flora is enlarged culturing (volume in pond is 50000 cubic metres, and the degree of depth is 1 meter) in biological contact oxidation pond, and in pond, nutrient solution adds microorganism growth desired nutritional element ((NH with local acid waste water
4)
2sO
42g/L, K
2hPO
40.3g/L, KCl0.05g/L, MgSO
40.3g/L, Ca (NO
3)
20.01g/L) configure and form; Load gac in nylon net bag as microbe carrier, be installed on PVC and build on support, and be positioned over pond median water level less than 1/3rd, absorbent charcoal carrier accounts for 2% of pond volume; Carry out aeration in pond, in solution, dissolved oxygen concentration is 4.2-6.5mg/L.After 72h, when solution oxide reduction potential is more than or equal to 850mV in pond, extracts 2/3 of solution in pond and enter the spray liquid spraying liquid pool and pile as ore deposit, start spray.In production process, the pH of typical leach liquor at 1.2-1.6, total concentration of iron 12-18g/L, Fe
2+concentration 1.5-3.6g/L, Eh650-680mV.When leaching that solution ph is less than 1.5 in liquid pool, to adopt in neutralization tank in Wingdale and, the pH value of leach liquor is controlled 1.5 ~ 1.9, and by Fe
3+concentration controls be less than 15g/L; Deliver in biological contact oxidation pond by the leach liquor after neutralization, in pond, solution temperature controls at 30-40 DEG C, by aeration control Dissolved Oxygen concentration Control at 5.0-7.1mg/L, detects weekly solution Middle nutrition material concentration, carries out adding suitable concentration range to.In biological contact oxidation pond, the mean residence time of solution is 48h, in carrier and solution addicted to sour iron-oxidizing bacterium by Fe
2+be oxidized to Fe
3+, after the redox potential of leach liquor is greater than 850mV, 2/3 of solution returns spray operation, supplements biological contact oxidation pond solution with ore deposit heap leach liquor.Through the circulated sprinklings of 300 days, dump leaching preoxidation, oxidation of pyrite rate is 73.5%, after in washing procedure, alkaline purification and operation, Cyanide Leaching operation, final gold leaching rate is 84.3%.
Comparative example 1
In order to make comparisons with embodiment 1, inquire into biological contact oxidation pond to the size of Heap leaching effectiveness promoter action, be provided with Experimental Comparison example 1(technical process as Fig. 5).Test adopts traditional dump leaching mode, uses the ore that embodiment 1 is same.After ore reduction to granularity is less than 20mm, construct auriferous pyrite leaching heap, ore deposit stack height 10 meters.The terms and conditions that embodiment 1 adopts is consistent.Compared with embodiment 1, leach liquor is piled without biological contact oxidation pond in the ore deposit of leaching in liquid pool, and directly enter spray liquid pool as spray liquid, circulated sprinkling leaches.Through the dump leaching preoxidation of 300 days, oxidation of pyrite rate was only 30.3%.In washing procedure, alkaline purification and operation, Cyanide Leaching operation, final ore gold leaching rate is only 56.2%.
Embodiment 2
In the biological dump leaching commerical test of certain low-grade secondary copper mine (technical process is as Fig. 6), composition of ores is Cu0.37%, Fe3.59%, S5.28%.In ore, main copper mineral is copper glance, covellite and enargite, and wherein copper glance accounts for more than 90%, pyrite content 10%, and main gangue mineral is feldspar, quartz, sericite.Secondary copper mine is crushed to after granularity is less than 40mm and constructs copper mine leaching heap.The test production phase utilizes local acid waste water to copper mine leaching heap spray continuously, and acid waste water pH2.1, total iron content 3g/L, Eh are 690mV.But due in production process, ore deposit heap consumption acid is comparatively large, and the acidity of spray liquid is inadequate, and production efficiency is lower.Increase in test and use biological contact oxidation pond (volume is 1000 cubic metres, the degree of depth 10 meters), utilize copper mine hillock (copper mine leaching yield more than 85%, containing about 10% pyrite) to produce acid, for the spray liquid of copper mine heap.In leaching liquid pool, leach liquor is after extraction process, and raffinate enters biological contact oxidation pond.Then cultivate in biological contact oxidation pond from local sulfide ore stack leach liquor enrichment addicted to sour iron-oxidizing bacterium group (enrichment culture based component: 9K substratum, 10g/L FeSO
4, pH1.5), mainly comprise iron protoxide hook end spirobacteria and thiobacillus ferrooxidant etc.Microorganism growth desired nutritional element ((NH is added in biological contact oxidation pond
4)
2sO
41g/L, K
2hPO
40.2g/L, KCl0.03g/L, MgSO
40.3g/L, Ca (NO
3)
20.01g/L); Load porous ceramic grain in nylon net bag as microbe carrier, being positioned in support constructed by PVC and being positioned over pond median water level less than 1/3rd, wherein porous ceramic grain volume accounts for 20% of pond volume; Carry out aeration in pond, in solution, dissolved oxygen concentration remains on 5.0-6.6mg/L, and in pond, solution temperature controls at 30-40 DEG C.Fe in ferrous oxidation pond
2+be Fe by microbiological oxidation
3+, after the redox potential of leach liquor is greater than 850mV, enter low acid low iron spray liquid pool, as the spray liquid of copper mine hillock (Cu leaching yield is greater than 80%).Dump leach fluid directly enters the leach liquor that peracid high ferro spray liquid pool is piled as copper mine.Then by copper mine leach liquor through extraction process, the pH of raffinate at 1.4-1.6, total concentration of iron 10-14g/L, Fe
2+concentration 1.2-3.3g/L, Eh663-690mV.Raffinate reaches the spray liquid of Eh850mV Posterior circle as copper mine hillock through biological contact oxidation pond through oxidation, continues pyritous Oxidation Leaching in copper mine hillock.The pH of leach liquor is reduced to about 1.0, and acidity reaches 18-23g/L, Fe
3+concentration reaches 20-25g/L.In experimentation, the temperature in biological contact oxidation pond remains on 30-40 DEG C, and dissolved oxygen concentration remains on 5.0-6.6mg/L, and nutritive element also ensures within suitable scope.After 24-48h, after in biological contact oxidation pond, Eh is greater than 850mV, 2/3 for spray liquid, then supplements with raffinate, moves in circles.Through the dump leaching of 120 days, the leaching yield of copper reached 85%.The pyrite in copper mine hillock is utilized to produce the sour sour iron supply achieved in secondary copper mine heap leaching process in test, without the need to additionally adding sulfuric acid again in copper mine spray liquid, reduce production cost, simultaneously higher in spray liquid sour concentration of iron, also substantially increase the leaching rate of copper, shorten period of heap leaching.
Claims (10)
1. one kind for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation, it is characterized in that, described biological contact oxidation pond comprises ferrous oxidation pond (4), arranges support (7) in ferrous oxidation pond (4), support (7) is arranged microbe carrier (6), aerating pipelines (5) is set at the bottom of ferrous oxidation pond.
2. according to claim 1 for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation, it is characterized in that, the volume of described ferrous oxidation pond (4) is 1000-50000 cubic meter, degree of depth 1-10 rice.
3. according to claim 1 for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation, it is characterized in that, described microbe carrier (6) is loaded in nylon net bag, hangs on support (7), is positioned over ferrous oxidation pond (4) median water level less than 1/3rd.
4. according to claim 1 for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation, it is characterized in that, the volume of described microbe carrier (6) accounts for the 2%-20% of ferrous oxidation pond (4) volume.
5. according to claim 1 for Fe in heap leaching process
2+the biological contact oxidation pond of oxidation, is characterized in that, described microbe carrier (6) is gac, one or more in porous ceramic grain, rejected ore, zeolite.
6. based on described in claim 1 for Fe in heap leaching process
2+the heap leaching method of the biological contact oxidation pond of oxidation, said method comprising the steps of:
1) derive from local sulfide ore stack leach liquor or acid wastewater in mine addicted to sour iron-oxidizing bacterium enlarged culturing in ferrous oxidation pond, contact 24-72 hour with microbe carrier, be fixed on microbe carrier addicted to sour iron-oxidizing bacterium absorption;
2) expose to the sun into air by aerating pipelines at the bottom of pond, ferrous oxidation pond, make dissolved oxygen concentration in ferrous oxidation pond reach 4-7mg/L, for providing oxygen addicted to sour iron-oxidizing bacterium growth;
3) ore deposit heap leach liquor or acid wastewater in mine pass in ferrous oxidation pond, and are oxidized 24-72 hour in pond, and when in pond, the redox potential of solution is more than or equal to 850mV, the solution extracted in ferrous oxidation pond is used as ore deposit heap spray liquid;
4) supplement with ore deposit heap leach liquor or acid wastewater in mine the solution taken away in ferrous oxidation pond again, continue Oxidation of Fe
2+, be used further to ore deposit heap spray liquid, move in circles to ore deposit heap oxidation complete.
7. heap leaching method according to claim 6, is characterized in that, describedly mainly comprises iron protoxide hook end spirobacteria and thiobacillus ferrooxidant addicted to sour iron-oxidizing bacterium.
8. heap leaching method according to claim 6, is characterized in that, the temperature in described ferrous oxidation pond controls at 30-40 DEG C.
9. heap leaching method according to claim 6, is characterized in that, adds the nutritive substance be applicable to addicted to sour iron-oxidizing bacterium, make (NH in ferrous oxidation pond
4)
2sO
4concentration reaches 1-3g/L, K
2hPO
4concentration reaches 0.2-0.5g/L, and KCl concentration reaches 0.02-0.1g/L, MgSO
4concentration reaches 0.2-0.5g/L, Ca (NO
3)
2concentration reaches 0.005-0.01g/L, for providing nutrition addicted to the growth of sour iron-oxidizing bacterium.
10. heap leaching method according to claim 6, is characterized in that, when ore deposit, heap pH of leaching solution is less than 1.5, or Fe
3+when concentration is greater than 25g/L, make its pH value to 1.5 ~ 2.0 with limestone vegetation, Fe
3+concentration is less than 20g/L, then enters in ferrous oxidation pond.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105200232A (en) * | 2015-08-27 | 2015-12-30 | 中国科学院过程工程研究所 | Method for starting water spraying in copper sulfide ore heap bioleaching |
| CN105603187A (en) * | 2016-01-13 | 2016-05-25 | 南华大学 | Moving bed bioreactor capable of oxidizing Fe2+ rapidly and method for oxidizing Fe2+ rapidly |
| CN107673486A (en) * | 2017-11-08 | 2018-02-09 | 东华理工大学 | Compounded mix post mechanism, the process for fixation of bacterium and leaching liquid processing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105200232A (en) * | 2015-08-27 | 2015-12-30 | 中国科学院过程工程研究所 | Method for starting water spraying in copper sulfide ore heap bioleaching |
| CN105603187A (en) * | 2016-01-13 | 2016-05-25 | 南华大学 | Moving bed bioreactor capable of oxidizing Fe2+ rapidly and method for oxidizing Fe2+ rapidly |
| CN105603187B (en) * | 2016-01-13 | 2017-07-11 | 南华大学 | Quick Oxidation Fe2+Moving-bed bioreactor and Quick Oxidation Fe2+Method |
| CN107673486A (en) * | 2017-11-08 | 2018-02-09 | 东华理工大学 | Compounded mix post mechanism, the process for fixation of bacterium and leaching liquid processing method |
| CN107673486B (en) * | 2017-11-08 | 2020-05-22 | 东华理工大学 | Composite packed column mechanism, bacterium immobilization method and leachate treatment method |
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| Publication number | Publication date |
|---|---|
| CN104630467B (en) | 2017-05-17 |
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