CN105621819B - One heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system and method - Google Patents

One heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system and method Download PDF

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CN105621819B
CN105621819B CN201610201591.8A CN201610201591A CN105621819B CN 105621819 B CN105621819 B CN 105621819B CN 201610201591 A CN201610201591 A CN 201610201591A CN 105621819 B CN105621819 B CN 105621819B
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heavy metal
percolate
sludge
artificial
artificial ecology
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CN105621819A (en
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钟儒波
游建军
胡志鑫
唐传祥
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Hunan Aibulu environmental Polytron Technologies Inc
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HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system and method, the system includes processing unit, processing unit includes homogeneous regulating reservoir, pH adjustment pond, electrochemical apparatus pond, aeration tank, tube settler, eco-filtration bed and the artificial ecology oxidation canal being sequentially communicated, and the side of the tube settler is additionally provided with sludge-tank；Homogeneous regulating reservoir is provided with the water inlet pipe that processing unit is flowed into for percolate, and artificial ecology oxidation canal is provided with the outlet pipe for the percolate discharge processing unit after processing.This method with electrochemistry, be aerated, be precipitated as pre-treating technology, a heavy metal species Tailings Dam percolate multiplexed combination processing method of the canal as aftertreatment technology is aoxidized using artificial ecology filter bed, artificial ecology, realize the progress from processing to reparation, it is high with processing and remediation efficiency, it is multi-functional, ecological, environmental protective, the advantages of non-secondary pollution.

Description

One heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system and method
Technical field
The invention belongs to dangerous waste percolate process field, further refers to a heavy metal species Tailings Dam percolate multiplexed combination Ecological treatment system and method.
Background technology
In recent years, with increasingly strict, many diafiltrations from heavy metal Tailings Dams such as metallurgy, mines of environmental regulation Liquid needs to handle, and undressed percolate has the characteristics that strong toxicity, persistence, non-degradable, and it is right in environment to be such as discharged into Air, soil and water environment can cause seriously to pollute.
Heavy metal much all has significant bio-toxicity, particularly mercury, cadmium, lead etc..This kind of material can not in water body It is biodegradable, the mutual conversion of various forms occurs in water body and disperses and is enriched in organism.Some heavy metals Such as mercury, methyl mercury can be transformed into the presence of microorganism, so that its bio-toxicity is strengthened.Some heavy metals can be Accumulated in the liver and kidney and other organs of animal body, cause body tissue to damage.The close sulphur heavy metal element such as mercury, cadmium, lead, zinc can Have king-sized affinity with the sulfydryl (- SH) of some enzymes with some tissues of human body, can inhibitory enzyme activity so as to influenceing machine The normal physiological function of body.Heavy metal in water body, even if concentration is small, it can also be accumulated in algae and bed mud, by fish and shellfish Body surface adsorbs, and food chain concentration is produced, so as to cause public hazards.Metallic element is favourable in water body or harmful depends not only on metal member Species, the physicochemical property of element, but also depending on the concentration and existing valence state and form of metallic element, even if beneficial metal Concentration of element also has violent toxicity more than a certain numerical value, animals and plants is poisoned, or even dead.
Heavy metal Tailings Dam typically contains the major pollutants such as arsenic, lead, zinc, chromium, cadmium, manganese, nickel, copper, place at this stage Reason method is roughly divided into chemical method and physico-chemical process.
Chemical method mainly by adding certain or several chemical substances in heavy metal percolate, make its with percolate Heavy metal reacts, produces indissoluble precipitation and remove.Traditional chemical precipitation method includes neutralization precipitation method, sulphide precipitation With the barium salt precipitation method etc..Neutralization precipitation method is a kind of method for the processing heavy metal percolate being most widely used at present.But Neutralization precipitation method reaction is slow, dosing is big, it is difficult to and accurate control, processing effluent quality are difficult to reach newest emission request, And a large amount of medicament uses cause sludge yield big, to the seriously corroded of equipment structures.Although technical maturity, stably, exist The shortcomings of operating cost is high, and floor space is big.
Physical does not change heavy metal existing forms in waste water typically, will a huge sum of money by the mechanism process such as adsorbing, filtering Category is separated from water body, mainly including absorption method, ion-exchange and membrane separation process.Ion-exchange is ion-exchanger Middle progress, the method are completed by ion-exchanger, load different types of ion-exchanger on request in exchanger, weight When the percolate of metal ion passes through exchanger, the ion on exchanger swaps with the heavy metal ion in water, reaches Except the purpose of heavy metal ion in percolate.This method is influenceed by exchanger species, yield and cost.
Membrane separation technique utilizes a kind of special pellicle, under the effect of the pressure, the chemical shape in percolate is not changed On the basis of state, method that percolate and solute are separated or concentrated, including electrodialysis and diaphragm electrolysis, membrane separation technique Can be by electrode polarization, fouling and corrosion in processing procedure the shortcomings of.
Physical processing heavy metal wastewater thereby is at present using more, but cost of investment is high, the price such as adsorbent and membrane material Costliness, operating cost is high, and scale application difficulty is big.
In the improvement of heavy metal Tailings Dam percolate, single method is often extremely difficult to increasingly harsh environmental protection will Ask, research and develop various combination techniques and replace single treatment technology.From the point of view of development trend both domestic and external, it is intended to chemically Based on, then it is aided with other combination techniques, researches and develops multifunctional combination treatment technology and technique is developing direction from now on.
The content of the invention
In view of the shortcomings of the prior art, the present invention is provided with electrochemistry, aeration, precipitation etc. as pre-treating technology；With artificial Eco-filtration bed, the heavy metal species Tailings Dam percolate multiplexed combination Ecological Disposal that artificial ecology oxidation canal is aftertreatment technology System and method, realize the progress from processing to reparation, and the technology has processing and high, multi-functional, the ecological ring of remediation efficiency Protect, non-secondary pollution.
The scheme taken of the present invention is：
One heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system, including processing unit, it is characterized in that, it is described Processing unit includes homogeneous regulating reservoir, pH adjustment pond, electrochemical apparatus pond, aeration tank and tube settler, the life being sequentially communicated State filter bed and artificial ecology oxidation canal, the side of the tube settler is additionally provided with sludge-tank；The homogeneous regulating reservoir is provided with The water inlet pipe of processing unit is flowed into for percolate, and artificial ecology oxidation canal is provided with for the percolate discharge processing unit after processing Outlet pipe；
The electrochemical apparatus pond includes being arranged on 300mm-500mm polar plate bracket above bottom of pond, is installed in parallel in pole 2N block pole plates on board mount, N >=1, wherein the negative pole for the pole plate cathode wire and external power source for coming odd bits connects, row It is connected in the pole plate positive wire of even bit with external power source positive pole；
The artificial ecology filter bed is up provided with filter plate filter sub-assembly, bed from bed bottom at 200mm~400mm spaces Base space and filter plate filter sub-assembly composition distributing room for water injection；Supporting layer, the supporting layer top are provided with above filter plate filter sub-assembly Provided with artificial ecology packing layer, the artificial ecology packing layer includes rubble sand packing layer successively from the bottom up, cobble-stone is filled out The bed of material, shuck filling layer, cobble-stone packing layer, flyash packing layer, fine quartz sand protective layer, natural soil layer；Described Kind has plant emergent aquactic plant in natural soil layer；
Plug-flow dividing plate back and forth is vertically arranged with inside the artificial ecology oxidation canal, the bottom plantation of artificial ecology oxidation canal is heavy Water plant.
Preferably, processing unit periphery filling artificial modified soil, and in artificial modified grown on soil enriching heavy metal Plant.
Preferably, slagging-off grid is provided with homogeneous regulating reservoir.
Preferably, pH adjusts bottom of pond portion and is provided with air stirring pipe, and pH adjustment pond inwall side is provided with pH meter, pH adjustment pond Outer edge is provided with the first chemicals dosing plant.
Preferably, electrochemical apparatus pond pond outer edge sets pH regulating systems.
Preferably, aeration tank inner bottom part is provided with rotational flow aeration device, and aeration tank inwall is provided with liquid level gauge, outside aeration tank Edge is provided with the second chemicals dosing plant.
Preferably, middle part is provided with inclined-tube support in tube settler, and inclined tube, tube settling are provided with above inclined-tube support Bottom of pond portion is provided with the bottom discharge pipeline that base sludge is discharged into sludge-tank, is provided with outside the tube settler of pond and water sinks from inclined tube Shallow lake pond is promoted to the elevator pump of artificial ecology filter bed.
Preferably, sludge-tank inwall is provided with mud level meter, and sludge screw pump and plate and frame filter press are provided with outside sludge-tank.
Preferably, rubble sand packing layer described in artificial ecology packing layer is thick from the quartz sand that particle diameter is 4~8mm Spend for 100~200mm；For the cobble-stone packing layer from the cobble-stone that particle diameter is 8~16mm, thickness is 100~200mm；Institute 16~32mm of shuck filling layer choosing oyster particle is stated, thickness is 400~500mm；The cobble-stone packing layer from 8~ 16mm cobble-stone, thickness are 100~200mm；The flyash packing layer is thick from the fly ash grain that particle diameter is 4~8mm Spend for 400~500mm；For the fine quartz sand protective layer from the quartz sand that particle diameter is 1~2mm, thickness is 100~200mm.
The purpose that artificial ecology filter bed is set in processing technological flow is in order to after process upstream materializing strategy It is difficult to low concentration heavy metal water up to standard and carries out microorganism-plant combined processing.Because using physico-chemical process to 1~ 3mg/L low concentration heavy metal water treatment effeciencies are very low, so using microorganism-plant to low-concentration heavy metal ions Absorption and transformation, it effectively can further reduce the concentration of heavy metal in waste water.
Preferred scheme, the emergent aquactic plant are Sedum alfredii Hance and penny cress, are planted between two kinds of plants, density be 8~12 clumps/ ㎡, 3~4 plants/clump.
Preferred scheme, planted between submerged plant planting toad's-mouth, Potamogeton maackianu, watermifoil and black algae, density is 8~10 Cong/㎡, 5~7 plants/clump.
Preferred scheme, the enriching heavy metal plant is ciliate desert-grass, plantation in the upper density of artificial modified soil 9 is 10~12 Cong/㎡, 6~8 plants/clump.
Another technical scheme of the present invention is a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment method, Using said system, specific steps include：
First, artificial ecology filter bed is debugged and biofilm：
(1) choose certain heavy metal sewage sludge stockyard and carry out sample collection, obtain effectively removing through laboratory separation screening low The dominant strain of concentration is oxidation Thiobacillus and Thiobacillus ferrooxidans, is tamed in laboratory, and be configured to bacterium solution and treat With；
(2) in pilot scale room, bacterium solution incubator is built into marsh sludge and heavy metal sewage sludge plus water preparation sludge concentration is 9000~10000mg/L mixing sludge 300L~350L, and nutriment is added, import bacterium by the 1/20~1/10 of sludge quantity Liquid, batch (-type) are opened low-speed mixer, opened 30~40 minutes, stop 30~40 minutes, stir 10~12 hours daily, control temperature 20 DEG C~25 DEG C, pH8~9, dissolved oxygen DO≤1.0mg/L, by the culture of 7-8 days, liquid obtained dominant bacteria into pink shape Kind；
(3) 2/3 held in artificial ecology filter bed by bed adds the municipal sewage that moisture content is more than 98%, and sludge is dense Spend for 4000~5000mg/L, dominant bacteria is imported into artificial ecology filter bed by the 1/5~1/4 of mud amount, imported within every 2~3 days Once, it is imported 4~5 times, controls 20~25 DEG C of temperature, pH7~11, dissolved oxygen DO≤0.5mg/L, by 8-10 days time, So that the various fillers of artificial ecology packing layer described in artificial ecology filter bed show biofilm on filler into brown-black glue-like Success；Now, abundant microorganism is just absorbed and fixed on filler, forms dominant microflora；After debugging, artificial ecology is controlled 20~30 DEG C of the temperature of filter bed, dissolved oxygen DO≤0.5mg/L, pH 7~11；Natural soil layer in artificial ecology filter bed Middle kind has emergent aquactic plant, and being rich in the root system of emergent aquactic plant has multiple-microorganism, common with the dominant microflora synergy on filler With enriching heavy metal ion；
Then, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system carries out commencement of commercial operation, including following step Suddenly：
(1) heavy metal Tailings Dam percolate enter homogeneous regulating reservoir to water quality carry out and, water is adjusted；
(2) water outlet with after enters pH adjustment pond, adjusts pH to 8~9；
(3) water outlet after pH adjustment enters electrochemical apparatus progress cell reaction, while adjusts pH to 8~10.5；
(4) water outlet after electrochemical apparatus is handled enters aeration tank progress aeration agitation and oxidation reaction, adds herein Flocculant is to carry out flocculation reaction；
(5) water outlet after aeration tank is handled enters back into tube settler and removes pollutant flocculation group；
(6) tube settler processing after supernatant be pumped to artificial ecology filter bed, through artificial ecology bed processing after by Bottom distributing room for water injection enters artificial ecology oxidation canal, it is last it is pressurized after reuse or be discharged into water body nearby；After tube settler processing Base sludge be discharged into sludge-tank, the sludge in sludge-tank returns to Tailings Dam after processing, and filtrate returns to homogeneous regulating reservoir.
Processing unit periphery backfills artificial modified soil, described in artificial modified grown on soil enriching heavy metal plant Artificial modified soil is the soil configured according to following quality proportioning：Native clay accounts for 60%, and lime accounts for 20%, and flyash accounts for 5%, humic acid accounts for 5%, and trace copper, iron, zinc, boron, molybdenum respectively account for 2%.
Dominant microflora in artificial ecology packing layer mainly includes lower microorganism belonging to genus：Thiobacillus thiooxidant, ferrous oxide sulphur bar Bacterium, desulfurization intestines bacterium layer, de- Sulfolobus, desulfurizing bacteria layer, desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces, desulfovibrio take off Sulphur germ category.
Being rich in the root system of emergent aquactic plant has multiple-microorganism to include：Pseudomonas alba, Flavobacterium, Bacillus alcaligenes, color bar Bacterium, achromobacter, bacillus, Agrobacterium, enterobacteria.
Emergent aquactic plant is Sedum alfredii Hance and penny cress, is planted between two kinds of plants.
One heavy metal species Tailings Dam percolate multiplexed combination ecological treatment method, preferable specific control parameter include：
(1) homogeneous regulating reservoir
Residence time：8~10h
(2) pH adjusts pond
pH：8~9
Residence time：20~30min
(3) electrochemical apparatus
pH：8~10.5
Electrochemical apparatus power supply voltage 380V
Residence time：10min~20min
Commutation cycle：15min~20min
Pole plate consumes：30‐120g/m3
(4) aeration tank
Residence time：30~40min
(5) tube settler
Residence time：2~3h
Inclined tube hydraulic load：1.0~1.5m3/㎡·h
(6) sludge-tank
Residence time：4~5h
(7) artificial ecology filter bed
Residence time：12~14h
(8) artificial ecology oxidation canal
Residence time：24~30h
(9) artificial modified soil is backfilled in the range of processing 30~40m of structures surrounding, and is planted on artificial modified soil Plant enriching heavy metal plant.
Compared with prior art, advantage of the invention is that：
1. pre-treating technology is turned materially with electrochemistry, aeration, precipitation etc.；Aoxidized with artificial ecology filter bed, artificial ecology The Ecological Disposal such as canal renovation technique replaces single handling process for the multiplexed combination technology of aftertreatment technology, can be really by composition Complicated heavy metal Tailings Dam percolate reaches country after processing and reparation《Urban sewage reutilization industry water standard》 (GB/T 19923-2005) and《Water environment quality standard》(GB3838-2002) strict water standard, water outlet can be direct Discharge or reuse, processing and reparation are thorough.
2. filling out artificial modified soil to processing structures surrounding and planting enriching heavy metal plant, can eliminate to local soil Pollution.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system；
Fig. 2 is Fig. 1 A-A profiles；
Fig. 3 is the process chart of a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment method；
In figure
1- homogeneous regulating reservoirs, 1-1- water inlet pipes, 1-2- slagging-off grids,
2-pH adjusts pond, 2-1- air agitators, and 2-2-pH is counted, the chemicals dosing plants of 2-3- first,
3- electrochemical apparatus pond, 3-1- polar plate brackets, 3-2- pole plates, 3-3- external power sources, 3-4-pH regulating systems,
4- aeration tanks, 4-1- rotational flow aeration devices, 4-2- liquid level gauges, the chemicals dosing plants of 4-3- second,
5- tube settlers, 5-1- inclined-tube supports, 5-2- inclined tubes, 5-3- bottoms discharge pipeline, 5-4- elevator pumps,
6- sludge-tanks, 6-1- mud level meters, 6-2- sludge screw pumps, 6-3- plate and frame filter press,
7- artificial ecology filter beds, 7-1- filter plate filter sub-assemblies, 7-2- match somebody with somebody hydrospace, 7-3- supporting layers, and 7-4- is artificial Ecological packing layer, 7-5- emergent aquactic plants,
8- artificial ecologys aoxidize canal, 8-1- plug-flow dividing plates back and forth, 8-2- submerged plants, 8-3- outlet pipes,
9- artificial modified soil,
10- enriching heavy metal plants.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples
Embodiment 1
As shown in Figure 1 and Figure 2, a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system, including processing dress Put, processing unit includes homogeneous regulating reservoir 1, pH adjustment pond 2, electrochemical apparatus pond 3, aeration tank 4, the tube settling being sequentially communicated Pond 5, eco-filtration bed 7, artificial ecology oxidation canal 8, the side of the tube settler 5 is additionally provided with sludge-tank 6；Homogeneous regulating reservoir 1 is provided with the water inlet pipe 1-1 that processing unit is flowed into for percolate, and artificial ecology oxidation canal 8 is provided with for the percolate row after processing Go out the outlet pipe 8-3 of processing unit.Processing unit periphery filling artificial modified soil 9, and richness is planted on artificial modified soil 9 Collect huge sum of money platymiscium 10.
Slagging-off grid 1-2 is provided with homogeneous regulating reservoir 1, removes the waste residue in waste water, the function of homogeneous regulating reservoir is equal With water quality, regulating pondage.
The pH adjustment bottom of pond 2 is provided with air stirring pipe 2-1, the pH adjustment inwall side of pond 2 and is provided with pH meter 2-2, pH adjustment The outer edge of pond 2 is provided with the first chemicals dosing plant 2-3, the first chemicals dosing plant 2-3 and adds a small amount of alkaline solution milk of lime to waste water PH is finely adjusted, and control ph is in the range of 8~9.
The function in pH adjustment pond is that pH is finely adjusted, to meet the water quality requirement of subsequent technique electrochemical apparatus.
Electrochemical apparatus pond 3 is up provided with polar plate bracket 3-1 from bottom of pond at 400mm spaces, polar plate bracket 3-1 is with 100 × 10mm channel-section steel makes；6 pieces of pole plate 3-2 are provided with above polar plate bracket 3-1, pole plate 3-2 specifications are length × width x thickness=900 × 600 × 8mm, make pole plate 3-2 with iron plate and connected with external power source 3-3 using unipolar fashion, that is, come the pole plate of odd bits Connected with the negative pole of cathode wire and external power source, the pole plate positive wire for coming even bit is connected with external power source positive pole. The pH regulating system 7-4 set by pond, including acid, alkali tank and compounding system, frequency conversion dosing pump and pH meter, are fine-tuning to pH 8~10.5.
The function of electrochemical apparatus is that electrolytic flocculation, electrofloatation and electrolysis oxidation-reduction reaction occurs, and waste water is entered Row advanced treating.
The pond inner bottom part of aeration tank 4 is provided with rotational flow aeration device 4-1, and the inwall of aeration tank 4 is provided with liquid level gauge 4-2, aeration tank 4 Outer edge is provided with the second chemicals dosing plant 4-3, the second chemicals dosing plant 4-3 and adds PAC and PAM into aeration tank 4, and it adds percentage Specific concentration is respectively 8% and 1 ‰, to carry out and promote flocculation reaction.
The function of aeration tank is to carry out aeration agitation and oxidation, and ferrous ion is converted into ferric ion.
Middle part is provided with inclined-tube support 5-1, inclined-tube support 5-1 ∠ 50 × 6mm angle steel systems in the tube settler 5 Make, be provided with inclined tube 5-2 above inclined-tube support 5-1, inclined tube 5-2 materials be Propylene polymerization, specification 50mm, size for 1000 × 500 × 867 (plagioclase) mm, piece thickness are 0.6mm, and bottom of pond portion is provided with bottom discharge pipeline 5-3, and base sludge is discharged into sludge-tank 6, pond Side is provided with elevator pump 5-4, and water is promoted into artificial ecology filter bed 7 from tube settler 5 is handled.
The function of tube settler：Separation of solid and liquid is carried out to aeration tank water outlet.
The inwall of sludge-tank 6 is provided with mud level meter 6-1, and sludge screw pump 6-2 and plate and frame filter press 6-3 are provided with by pond, dirty Mud returns to Tailings Dam after processing, and filtrate returns to homogeneous regulating reservoir 1.
Artificial ecology filter bed 7 is up provided with filter plate filter sub-assembly 7-1, filter plate material from bed bottom at 300mm spaces For steel plate, size is length × width x thickness=980 × 480 × 10mm, is provided with D20 holes, pitch of holes 80mm on steel plate, filter is double Filter, size are × H=80 × 180mm, bed base space and filter plate filter sub-assembly 7-1 composition distributing rooms for water injection 7-2；Filter plate filter group Supporting layer 7-3 is provided with above component 7-1, supporting layer 7-3 is from the cobblestone that particle diameter is 16~32mm, to support people above Work ecology packing layer 7-4；Artificial ecology packing layer 7-4, totally 7 layers of artificial ecology packing layer 7-4 are set above supporting layer, from lower past On set gradually：1. rubble sand packing layer, from the quartz sand that particle diameter is 4~8mm, thickness 100mm；2. boulderet hardcore Layer, from the cobble-stone that particle diameter is 8~16mm, thickness 100mm；3. shuck filling layer, from 16~32mm oyster Grain, thickness 400mm；4. cobble-stone packing layer, from 8~16mm cobble-stone, thickness 100mm；5. flyash packing layer, From the fly ash grain that particle diameter is 4~8mm, thickness 400mm；6. fine quartz sand protective layer, it is 1~2mm's from particle diameter Quartz sand, thickness 100mm；7. natural soil layer, thickness 400mm；Emergent aquactic plant 7-5, very water are planted in natural soil layer Plant 7-5 is Sedum alfredii Hance, is planted between penny cress, and density is 8~12 Cong/㎡, 3~4 plants/clump.
The purpose that artificial ecology filter bed is set in processing technological flow is in order to after process upstream materializing strategy It is difficult to low concentration heavy metal water up to standard and carries out microorganism-plant combined processing.Because using physico-chemical process to 1~ 3mg/L low concentration heavy metal water treatment effeciencies are very low, so using microorganism-plant to low-concentration heavy metal ions Absorption and transformation, it effectively can further reduce the concentration of heavy metal in waste water.
The debugging of the artificial ecology filter bed 7 and operation method：
(1) choose certain heavy metal sewage sludge stockyard and carry out sample collection, obtain effectively removing through laboratory separation screening low The dominant strain of concentration is Thiobacillus thioxidans (Thiobacillus thiooxidans) and Thiobacillus ferrooxidans (Thiobacillus ferrooxidans), is tamed, and it is stand-by to be configured to bacterium solution in laboratory.
(2) it is 9000 that in pilot scale room, bacterium solution incubator, which is built into marsh sludge, heavy metal sewage sludge plus water and prepares sludge concentration, ~10000mg/L mixing sludge 300L, and the nutriments such as a little wheat bran, vinasse are added, import and match somebody with somebody by the 1/15 of sludge quantity The bacterium solution made, batch (-type) open low-speed mixer (opening 30 minutes, stop 30 minutes), stir 10~12 hours daily, control temperature 20~25 DEG C of degree, pH8~9, dissolved oxygen DO≤1.0mg/L, by the culture of 7 days, liquid removed low concentration weight into pink shape Metal dominant bacteria is prepared successfully.
(3) 2/3 held in artificial ecology filter bed by bed adds the municipal sewage that moisture content is 99%, and sludge concentration is 4000~5000mg/L, dominant bacteria is imported into artificial ecology bed by the 1/5 of mud amount, imported once within every 2 days, it is imported 4 times, control 20~25 DEG C of temperature processed, pH7~11, dissolved oxygen DO≤0.5mg/L, by 8 day time, the various fillers of artificial ecology packing layer Into brown-black gluing shape, show biofilm success on filler.Now, abundant microorganism is just absorbed and fixed on filler.Due to being Using dominant bacteria biofilm, that is, the dominant bacteria being introduced into and the carrier environment that passes through grown in debugging process on various fillers sieve The mixing of the dominant bacteria of choosing and enrichment, forms dominant microflora.These dominant microfloras and Sedum alfredii Hance, the microorganism of penny cress root system Synergy, heavy metal ion have a very strong accumulation ability, and the general physical chemistry method that is particularly suitable for use in is not easy to remove low dense Spend heavy metal ion.
After debugging, 20~30 DEG C, dissolved oxygen DO≤0.5mg/L of temperature, pH7~11, you can be transferred to normal fortune are controlled OK.
The ecological bed filler series dominant microflora after cultivating successfully of the hand-stuff mainly includes lower microorganism belonging to genus：Oxygen Change sulphur Thiobacillus Thiobacillus thiooxidans), Thiobacillus ferrooxidans (Thiobacillus Ferrooxidams), desulfurization intestines bacterium layer (Desulfotomaculum), de- Sulfolobus (Desufobacteria), desulfurization are thin Bacterium layer (Desulfobacter), desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces (Desulfococcus-Desulfonem Desulfosarcina), desulfovibrio desulfurization germ category (Desulfovibrio-Desulfomicrobium) etc.；Root system series Dominant microflora mainly includes lower microorganism belonging to genus：Pseudomonas alba (Pseudomonas), Flavobacterium (Flavobactreium), production Alkali bacillus (Alaligenes), color bacillus (Chromobacter), achromobacter (Actromobacter), bacillus (Bacillus), Agrobacterium (Agrobacterim), enterobacteria (Enterobacteriaceae) etc..
Absorption and enriching heavy metal give up the dominant microflora homobium of mentioned microorganism-plant combined processing and reparation well The cadmium of low concentration, chromium, lead, zinc, nickel, copper and metalloid arsenic etc., its mechanism are in water：Efficient dominant microflora symbiosis according to culture Body heavy metal ion has electrostatic adsorption, catalyzed conversion effect, complexing, flocculation and the coprecipitated effect of enzyme, to pH's Cushioning effect so that the adsorbed enrichment of low-concentration heavy metal ions, heavy collection and removed.
The function of artificial ecology filter bed：With plant-microorganism United Technologies, processing is difficult to remove low with physical chemistry method Concentration heavy metal waste water.
Plug-flow dividing plate 8-1 back and forth, canal bottom kind planting submerged plant 8-2 are vertically arranged with inside artificial ecology oxidation canal 8, is sunk Water plant 8-2 kinds are planted plants between toad's-mouth, Potamogeton maackianu, watermifoil and black algae, and density is 8~10 clumps/㎡, 5~7 plants/clump.
Artificial modified soil 9 is the soil moved in improve the original in the backfill of processing unit periphery, and the formula of artificial modified soil 9 is：Locality is viscous Soil accounts for 60%, and lime accounts for 20%, and flyash accounts for 5%, and humic acid accounts for 5%, and trace copper, iron, zinc, boron, molybdenum respectively account for 2%.Place The width of artificial modified soil 9 that reason device periphery is filled out is 30m.
Enriching heavy metal plant 10 be ciliate desert-grass, plantation on artificial modified soil 9, density is 10~12 Cong/㎡, 6~8 Strain/clump.One season of ciliate desert-grass gathers in once.
Embodiment 2
With the heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system described in embodiment 1 to certain Pb-Zn tailings Storehouse heavy metal percolate is handled and restoration of the ecosystem, as shown in figure 3, specific steps include：
First, artificial ecology filter bed is debugged and biofilm：
(1) choose certain heavy metal sewage sludge stockyard and carry out sample collection, obtain effectively removing through laboratory separation screening low The dominant strain of concentration is oxidation Thiobacillus and Thiobacillus ferrooxidans, is tamed in laboratory, and be configured to bacterium solution and treat With；
(2) in pilot scale room, bacterium solution incubator is built into marsh sludge and heavy metal sewage sludge plus water preparation sludge concentration is 9000~10000mg/L mixing sludge 300L~350L, and nutriment is added, import bacterium by the 1/20~1/10 of sludge quantity Liquid, batch (-type) are opened low-speed mixer, opened 30~40 minutes, stop 30~40 minutes, stir 10~12 hours daily, control temperature 20 DEG C~25 DEG C, pH8~9, dissolved oxygen DO≤1.0mg/L, by the culture of 7-8 days, liquid obtained dominant bacteria into pink shape Kind；
(3) 2/3 held in artificial ecology filter bed by bed adds the municipal sewage that moisture content is more than 98%, and sludge is dense Spend for 4000~5000mg/L, dominant bacteria is imported into artificial ecology filter bed by the 1/5~1/4 of mud amount, imported within every 2~3 days Once, it is imported 4~5 times, controls 20~25 DEG C of temperature, pH7~11, dissolved oxygen DO≤0.5mg/L, by 8-10 days time, So that the various fillers of artificial ecology packing layer described in artificial ecology filter bed show biofilm on filler into brown-black glue-like Success；Now, abundant microorganism is just absorbed and fixed on filler, forms dominant microflora；After debugging, artificial ecology is controlled 20~30 DEG C of the temperature of filter bed, dissolved oxygen DO≤0.5mg/L, pH 7~11；Natural soil layer in artificial ecology filter bed Middle kind has emergent aquactic plant, and being rich in the root system of emergent aquactic plant has multiple-microorganism, common with the dominant microflora synergy on filler With enriching heavy metal ion；
Then, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system carries out commencement of commercial operation, including following step Suddenly：
(1) heavy metal Tailings Dam percolate enter homogeneous regulating reservoir to water quality carry out and, water is adjusted；
(2) water outlet with after enters pH adjustment pond, adjusts pH to 8~9；
(3) water outlet after pH adjustment enters electrochemical apparatus progress cell reaction, while adjusts pH to 8~10.5；
(4) water outlet after electrochemical apparatus is handled enters aeration tank progress aeration agitation and oxidation reaction, adds herein Flocculant is to carry out flocculation reaction；
(5) water outlet after aeration tank is handled enters back into tube settler and removes pollutant flocculation group；
(6) tube settler processing after supernatant be pumped to artificial ecology filter bed, through artificial ecology bed processing after by Bottom distributing room for water injection enters artificial ecology oxidation canal, it is last it is pressurized after reuse or be discharged into water body nearby；After tube settler processing Base sludge be discharged into sludge-tank, the sludge in sludge-tank returns to Tailings Dam after processing, and filtrate returns to homogeneous regulating reservoir.
Processing unit periphery backfills artificial modified soil, described in artificial modified grown on soil enriching heavy metal plant Artificial modified soil is the soil configured according to following quality proportioning：Native clay accounts for 60%, and lime accounts for 20%, and flyash accounts for 5%, humic acid accounts for 5%, and trace copper, iron, zinc, boron, molybdenum respectively account for 2%.
Dominant microflora in artificial ecology packing layer mainly includes lower microorganism belonging to genus：Thiobacillus thiooxidant, ferrous oxide sulphur bar Bacterium, desulfurization intestines bacterium layer, de- Sulfolobus, desulfurizing bacteria layer, desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces, desulfovibrio take off Sulphur germ category.
Being rich in the root system of emergent aquactic plant has multiple-microorganism to include：Pseudomonas alba, Flavobacterium, Bacillus alcaligenes, color bar Bacterium, achromobacter, bacillus, Agrobacterium, enterobacteria.
Emergent aquactic plant is Sedum alfredii Hance and penny cress, is planted between two kinds of plants.
Its main design parameters is：
1. water：6000m3/d
2. design Inlet and outlet water water quality unit：mg/L
Project Pb (lead) Zn (zinc) Cd (cadmium) As (arsenic)
Influent quality ≤6 ≤5 ≤2 ≤1
Effluent quality ≤0.05 ≤1.0 ≤0.05 ≤0.005
3. main units and equipment
(1) homogeneous regulating reservoir
Design the residence time：8h
Design size：L × W × H=25 × 20 × 4 (m)
It is interior that thick, each one of fine fack is set
(2) pH adjusts pond
Design the residence time：20min
Design size：L × W × H=6 × 6 × 4 (m)
It is equipped with：1 set of stirring pipe, pH meter 1,1 set of chemicals dosing plant
(3) electrochemical apparatus pond
Design size：L*W*H=10*10*3 (m)
It is equipped with：Single-beam crane 1,1 set of pH regulating systems
Electrochemical apparatus power supply：The line system of three-phase 5,380V
Configure power：60kw
Pole plate module：1.0t
Residence time：10min
Commutation cycle：15min
Pole plate consumes：30‐120g/m3
(4) aeration tank
Design the residence time：30min
Design size：L × W × H=10 × 5 × 4 (m)
Configuration：Roots blower 2,20m3/ h, boost 120kPa, power 45W, the using and the reserved；138 sets of rotational flow aeration device, Liquid level gauge 1,2 sets of chemicals dosing plant
(5) tube settler
Design the residence time：2h
Inclined tube hydraulic load：1.0m3/㎡·h
Design size：L × W × H=20 × 10 × 4 (m)
It is equipped with：Purlin vehicle type mud scraper 1, inclined tube filler 200m3
(6) sludge-tank
Residence time：4h
Design size：L × W × H=12.5 × 10 × 4 (m)
It is equipped with：Sludge screw pump 2, the using and the reserved, flow 20m3/ h, lift 120m；Plate and frame filter press 1
(7) artificial ecology filter bed
Residence time：12h
Design size：L × W × H=40 × 30 × 2.5 (m)
It is equipped with：7 kinds of ecological fillers, plant 4 kinds of emergent aquactic plants
(8) artificial ecology oxidation canal
Residence time：24h
Design size：L × W × H=400 × 30 × 2.5 (m)
It is equipped with：4 kinds of submerged plants are planted at 4 dividing plates back and forth, canal bottom
(9) artificial modified soil is backfilled in the range of the 30m of processing unit periphery and plants ciliate desert-grass.
Water quality after treatment：Lead≤0.1mg/L, zinc≤3.0mg/L, cadmium≤0.01mg/L, arsenic≤0.005mg/L, Reach or better than country《Urban sewage reutilization industry water standard》GB/T 19923-2005 and《Surface water environment quality》 The class water standards of GB3838-2002 III.

Claims (14)

1. a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system, including processing unit, it is characterized in that, the place Reason device includes homogeneous regulating reservoir (1), pH adjustment pond (2), electrochemical apparatus pond (3), aeration tank (4), the inclined tube being sequentially communicated Sedimentation basin (5), artificial ecology filter bed (7) and artificial ecology oxidation canal (8), the side of the tube settler (5) is additionally provided with Sludge-tank (6)；The homogeneous regulating reservoir (1) is provided with the water inlet pipe (1-1) that processing unit is flowed into for percolate, and artificial ecology oxygen Change canal (8) and be provided with the outlet pipe (8-3) that processing unit is discharged for the percolate after processing；
The electrochemical apparatus pond (3) includes being arranged on 300mm-500mm polar plate bracket (3-1), parallel installation above bottom of pond 2N blocks pole plate (3-2) on polar plate bracket (3-1), N >=1, wherein coming the pole plate cathode wire and external electrical of odd bits The negative pole connection in source, the pole plate positive wire for coming even bit are connected with external power source positive pole；
The artificial ecology filter bed (7) is up provided with filter plate filter sub-assembly (7- from bed bottom at 200mm~400mm spaces 1), bed base space and filter plate filter sub-assembly (7-1) composition distributing room for water injection (7-2)；It is provided with and holds above filter plate filter sub-assembly (7-1) Layer (7-3) is held in the palm, artificial ecology packing layer (7-4), the artificial ecology packing layer (7-4) are provided with above the supporting layer (7-3) Include rubble sand packing layer, cobble-stone packing layer, shuck filling layer, cobble-stone packing layer, flyash successively from the bottom up Packing layer, fine quartz sand protective layer, natural soil layer；Kind is implanted with emergent aquactic plant (7-5) in the natural soil layer；
Plug-flow dividing plate (8-1) back and forth, artificial ecology oxidation canal (8) bottom are vertically arranged with inside the artificial ecology oxidation canal (8) Portion's kind planting submerged plant (8-2)；
The processing unit periphery filling artificial modified soil (9), and plant enriching heavy metal on artificial modified soil (9) and plant Thing (10).
2. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, it is described equal Slagging-off grid (1-2) is provided with matter regulating reservoir (1).
3. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, the pH Adjustment pond (2) bottom is provided with air stirring pipe (2-1), and pH adjustment pond (2) inwall side is provided with pH meter (2-2), pH adjustment pond (2) outer edge is provided with the first chemicals dosing plant (2-3).
4. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, the electricity Chemical device pond (3) pond outer edge sets pH regulating systems (3-4).
5. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, the exposure Gas pond (4) pond inner bottom part is provided with rotational flow aeration device (4-1), and aeration tank (4) inwall is provided with liquid level gauge (4-2), aeration tank (4) Outer edge is provided with the second chemicals dosing plant (4-3).
6. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, it is described oblique Middle part is provided with inclined-tube support (5-1) in pipe sedimentation basin (5), and inclined-tube support (5-1) is provided with inclined tube (5-2) above, and inclined tube sinks Shallow lake pond (5) bottom is provided with the bottom discharge pipeline (5-3) that base sludge is discharged into sludge-tank (6), pond tube settler (5) peripheral hardware It is equipped with the elevator pump (5-4) that water is promoted to artificial ecology filter bed from tube settler (5).
7. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, the dirt Mud sump (6) inwall is provided with mud level meter (6-1), and sludge screw pump (6-2) and plate and frame filter press (6- are provided with outside sludge-tank (6) 3)。
8. heavy metal Tailings Dam percolate multiplexed combination ecological treatment system according to claim 1, it is characterized in that, the people Rubble sand packing layer described in work ecology packing layer (7-4) from particle diameter be 4~8mm quartz sand, thickness be 100~ 200mm；For the cobble-stone packing layer from the cobble-stone that particle diameter is 8~16mm, thickness is 100~200mm；The oyster shell is filled out The bed of material selects 16~32mm oyster particle, and thickness is 400~500mm；The cobble-stone packing layer selects 8~16mm boulderet Stone, thickness are 100~200mm；The flyash packing layer from particle diameter be 4~8mm fly ash grain, thickness be 400~ 500mm；For the fine quartz sand protective layer from the quartz sand that particle diameter is 1~2mm, thickness is 100~200mm.
9. a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment method, it is characterized in that, usage right requires one of 1-8 The system, specific steps include：
First, artificial ecology filter bed is debugged and biofilm：
(1) choose certain heavy metal sewage sludge stockyard and carry out sample collection, obtain effectively removing low concentration through laboratory separation screening Dominant strain be oxidation Thiobacillus and Thiobacillus ferrooxidans, tamed in laboratory, and it is stand-by to be configured to bacterium solution；
(2) in pilot scale room bacterium solution incubator be built into marsh sludge and heavy metal sewage sludge plus water prepare sludge concentration be 9000~ 10000mg/L mixing sludge 300L~350L, and nutriment is added, bacterium solution is imported by the 1/20~1/10 of sludge quantity, Formula of having a rest opens low-speed mixer, opens 30~40 minutes, stops 30~40 minutes, stirs 10~12 hours daily, controls 20 DEG C of temperature ~25 DEG C, pH8~9, dissolved oxygen DO≤1.0mg/L, by the culture of 7-8 days, liquid obtained dominant bacteria into pink shape；
(3) 2/3 held in artificial ecology filter bed by bed adds the municipal sewage that moisture content is more than 98%, and sludge concentration is 4000~5000mg/L, dominant bacteria is imported into artificial ecology filter bed by the 1/5~1/4 of mud amount, imported once within every 2~3 days, It is imported 4~5 times, controls 20~25 DEG C of temperature, pH7~11, dissolved oxygen DO≤0.5mg/L, by 8-10 days time so that people The various fillers of artificial ecology packing layer described in work eco-filtration bed show biofilm success on filler into brown-black glue-like； Now, abundant microorganism is just absorbed and fixed on filler, forms dominant microflora；After debugging, control artificial ecology filtering 20~30 DEG C of the temperature of bed, dissolved oxygen DO≤0.5mg/L, pH 7~11；Planted in natural soil layer in artificial ecology filter bed There is emergent aquactic plant, being rich in the root system of emergent aquactic plant has multiple-microorganism, common rich with the dominant microflora synergy on filler Collect heavy metal ion；
Then, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system carries out commencement of commercial operation, comprises the following steps：
(1) heavy metal Tailings Dam percolate enter homogeneous regulating reservoir to water quality carry out and, water is adjusted；
(2) water outlet with after enters pH adjustment pond, adjusts pH to 8~9；
(3) water outlet after pH adjustment enters electrochemical apparatus progress cell reaction, while adjusts pH to 8~10.5；
(4) water outlet after electrochemical apparatus is handled enters aeration tank progress aeration agitation and oxidation reaction, adds flocculation herein Agent is to carry out flocculation reaction；
(5) water outlet after aeration tank is handled enters back into tube settler and removes pollutant flocculation group；
(6) supernatant after tube settler processing is pumped to artificial ecology filter bed, by bottom after the processing of artificial ecology bed Distributing room for water injection enters artificial ecology oxidation canal, it is last it is pressurized after reuse or be discharged into water body nearby；Bottom after tube settler processing Portion's sludge is discharged into sludge-tank, and the sludge in sludge-tank returns to Tailings Dam after processing, and filtrate returns to homogeneous regulating reservoir.
10. heavy metal Tailings Dam percolate multiplexed combination ecological treatment method according to claim 9, it is characterized in that, in institute Processing unit periphery backfill artificial modified soil is stated, it is described manually to change in artificial modified grown on soil enriching heavy metal plant Good soil is the soil configured according to following quality proportioning：Native clay accounts for 60%, and lime accounts for 20%, and flyash accounts for 5%, humic Acid accounts for 5%, and trace copper, iron, zinc, boron, molybdenum respectively account for 2%.
11. heavy metal Tailings Dam percolate multiplexed combination ecological treatment method according to claim 9, it is characterized in that, it is described Dominant microflora in artificial ecology packing layer mainly includes lower microorganism belonging to genus：Thiobacillus thiooxidant, Thiobacillus ferrooxidans, desulfurization intestines Bacterium layer, de- Sulfolobus, desulfurizing bacteria layer, desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces, desulfovibrio desulfurization germ category.
12. heavy metal Tailings Dam percolate multiplexed combination ecological treatment method according to claim 9, it is characterized in that, very water Being rich in the root system of plant has multiple-microorganism to include：Pseudomonas alba, Flavobacterium, Bacillus alcaligenes, color bacillus, achromobacter, Bacillus, Agrobacterium, enterobacteria.
13. heavy metal Tailings Dam percolate multiplexed combination ecological treatment method according to claim 9, it is characterized in that, it is described Emergent aquactic plant is Sedum alfredii Hance and penny cress, is planted between two kinds of plants.
14. according to one of the claim 9-13 heavy metal Tailings Dam percolate multiplexed combination ecological treatment methods, its feature It is that specific control parameter includes：
(1) homogeneous regulating reservoir
Residence time：8~10h
(2) pH adjusts pond
pH：8~9
Residence time：20~30min
(3) electrochemical apparatus
pH：8~10.5
Electrochemical apparatus power supply voltage 380V
Residence time：10min~20min
Commutation cycle：15min~20min
Pole plate consumes：30-120g/m3
(4) aeration tank
Residence time：30~40min
(5) tube settler
Residence time：2~3h
Inclined tube hydraulic load：1.0~1.5m3/ ㎡ h
(6) sludge-tank
Residence time：4~5h
(7) artificial ecology filter bed
Residence time：12~14h
(8) artificial ecology oxidation canal
Residence time：24~30h
(9) artificial modified soil is backfilled in the range of processing 30~40m of structures surrounding, and it is rich in artificial modified grown on soil Collect huge sum of money platymiscium.
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