CN205556398U - Heavy metal tailing storehouse filtration liquid tuple symphysis attitude processing system - Google Patents
Heavy metal tailing storehouse filtration liquid tuple symphysis attitude processing system Download PDFInfo
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- CN205556398U CN205556398U CN201620268652.8U CN201620268652U CN205556398U CN 205556398 U CN205556398 U CN 205556398U CN 201620268652 U CN201620268652 U CN 201620268652U CN 205556398 U CN205556398 U CN 205556398U
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Abstract
The utility model discloses a heavy metal tailing storehouse filtration liquid tuple symphysis attitude processing system, this system include processing apparatus, and processing apparatus is including the homogeneity equalizing basin, pH adjusting pool, electric chemical devices pond, aeration tank, tube settler, ecological filter bed and the artificial ecology oxidation canal that feed through in proper order, one side of tube settler still is equipped with the sludge impoundment, the homogeneity equalizing basin is equipped with and supplies the filtration liquid stream to go into processing apparatus's inlet tube, and artificial ecology oxidation canal is equipped with the filtration liquid discharge processing apparatus's after supplying to handle outlet pipe. This system uses electrochemistry, aeration, sediment as pretreatment process to artificial ecology filter bed, artificial ecology oxidation canal have realized from handling prosthetic progress having and handle the height with remediation efficiency for back treatment process's a heavy metal tailing storehouse filtration liquid tuple closes processing system, multi -functional, ecological environmental protection, no secondary pollution's advantage.
Description
Technical field
This utility model belongs to the useless percolate process field of danger, refers to a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system further.
Background technology
In recent years, the strictest along with environmental regulation, the percolate much deriving from the heavy metal Tailings Dam such as metallurgy, mine needs to process, undressed percolate has the features such as strong toxicity, persistency, non-degradable, as being discharged in environment, air, soil and water environment can be caused severe contamination.
Heavy metal the most all has significant bio-toxicity, particularly hydrargyrum, cadmium, lead etc..This kind of material can not be biodegradable in water body, and mutually converting and disperseing and be enriched in organism of various form occurs in water body.Some heavy metal such as hydrargyrum, can be transformed into methyl mercury under the effect of microorganism, so that its bio-toxicity is strengthened.Some heavy metals can accumulate in the liver of animal body and kidney and other organs, causes body tissue to damage.Parent's sulfur heavy metal element such as hydrargyrum, cadmium, lead, zinc can have king-sized affinity with the sulfydryl (-SH) of some enzymes of some tissue of human body, can the activity of inhibitory enzyme thus affect the normal physiological function of body.Heavy metal in water body, even if concentration is little, it is possible to accumulates in algae and bed mud, is adsorbed by fish and shellfish body surface, produces food chain and concentrates, thus causes public hazards.In water body, metallic element is favourable or harmful depends not only on the kind of metallic element, physicochemical property, but also depend on the concentration of metallic element and the valence state of existence and form, even if useful metallic element concentration exceedes a certain numerical value also has violent toxicity, animals and plants are made to be poisoned, even dead.
Heavy metal Tailings Dam typically contains the major pollutants matter such as arsenic, lead, zinc, chromium, cadmium, manganese, nickel, copper, and the processing method of present stage is roughly divided into chemical method and physico-chemical process.
Chemical method is mainly by adding certain or several chemical substance in heavy metal percolate so that it is reacts with heavy metal in percolate, produce indissoluble precipitation and remove.Traditional chemical precipitation method includes neutralization precipitation method, sulphide precipitation and the barium salt sedimentation method etc..Neutralization precipitation method is a kind of method processing heavy metal percolate being most widely used at present.But the reaction of neutralization precipitation method is slow, dosing is big, it is difficult to accurately control, process the emission request that effluent quality is difficult to reach up-to-date, and a large amount of medicament uses and causes sludge yield big, the seriously corroded to equipment structures.Although technical maturity, stable, but it is high to there is operating cost, the shortcomings such as floor space is big.
Physical does not the most change heavy metal existing forms in waste water, heavy metal is separated from water body by mechanism processes such as absorption, filtrations, mainly includes absorption method, ion exchange and membrane separation process.Ion exchange is to carry out in ion exchanger, the method completes by ion-exchanger, different types of ion-exchanger is loaded on request in exchanger, when the percolate of heavy metal ion is by exchanger, ion on exchanger swaps with the heavy metal ion in water, reaches to remove the purpose of heavy metal ion in percolate.This method is affected by exchanger kind, yield and cost.
Membrane separation technique utilizes a kind of special semipermeable membrane, under the effect of the pressure, do not changing in percolate on the basis of chemical form, the method carrying out separating or concentrating by percolate and solute, including electrodialysis and diaphragm electrolysis, membrane separation technique can be by electrode polarization, the shortcoming such as fouling and corrosion in processing procedure.
It is currently used more that Physical processes heavy metal wastewater thereby, but cost of investment is high, and adsorbent and membrane material etc. are expensive, and 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 the most harsh environmental requirement, researches and develops various combination technique and replaces single treatment technology.From the point of view of development trend both domestic and external, trending towards being chemically main, then be aided with other combination techniques, research and development multifunctional combination treatment technology and technique are developing direction from now on.
Utility model content
For the deficiencies in the prior art, this utility model provides with electrochemistry, aeration, precipitation etc. as pre-treating technology；With artificial ecology filter bed, artificial ecology oxidation canal heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system and a method as aftertreatment technology, achieving from processing to the progress repaired, this technology has process and remediation efficiency is high, multi-functional, ecological, environmental protective, non-secondary pollution.
The scheme that this utility model is taked is:
One heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system, including processing means, it is characterized in that, described processing means includes that the homogenizing regulating reservoir being sequentially communicated, pH adjust pond, electrochemical apparatus pond, Aeration tank and tube settler, artificial ecology filter bed and artificial ecology oxidation canal, and the side of described tube settler is additionally provided with sludge-tank；Described homogenizing regulating reservoir is provided with the water inlet pipe flowing into processing means for percolate, and artificial ecology oxidation canal is provided with the outlet pipe discharging processing means for the percolate after processing；
Described artificial ecology filter bed from being up provided with filter plate filter molectron at the bottom of bed at 200mm～400mm space, bed base space and filter plate filter molectron composition distributing room for water injection；Filter plate filter molectron is arranged over supporting layer; described supporting layer is arranged over artificial ecology packing layer, and described artificial ecology packing layer includes rubble sand packing layer, cobble-stone packing layer, shuck filling layer, cobble-stone packing layer, flyash packing layer, fine quartz sand protective layer, natural soil layer the most successively；Described natural soil layer plants to have and plants emergent aquactic plant；
It is vertically arranged with plug-flow dividing plate back and forth inside described artificial ecology oxidation canal, bottom artificial ecology oxidation canal, plants planting submerged plant.
Preferably, artificial modified soil is filled in processing means periphery, and artificial modified grown on soil enriching heavy metal plant.
Preferably, it is provided with slagging-off grid in homogenizing regulating reservoir.
Preferably, pH adjusts and is provided with air stirring pipe bottom pond, and pH adjusts inwall limit, pond and is provided with pH meter, and pH adjusts pond outer edge and is provided with the first chemicals dosing plant.
Preferably, pond, electrochemical apparatus pond outer edge arranges pH regulator system.
Preferably, described electrochemical apparatus pond (3) includes the polar plate bracket (3-1) being arranged on 300mm-500mm above at the bottom of pond, 2N block pole plate (3-2) being installed in parallel on polar plate bracket (3-1), N >=1, the pole plate cathode wire wherein coming odd bits is connected with the negative pole of external power source, and the pole plate positive wire coming even bit is connected with external power source positive pole.
Preferably, aeration tank inner bottom part is provided with rotational flow aeration device, and Aeration tank inwall is provided with liquidometer, and Aeration tank outer edge is provided with the second chemicals dosing plant.
Preferably, in tube settler, middle part is provided with inclined-tube support, inclined-tube support is provided above with inclined tube, is provided with the bottom discharge pipeline that base sludge is discharged into sludge-tank bottom tube settler, and tube settler is outside equipped with the elevator pump that water is promoted to artificial ecology filter bed from tube settler.
Preferably, sludge-tank inwall is provided with mud level meter, and sludge-tank is outside equipped with mud screw pump and filter press.
Preferably, the quartz sand that rubble sand packing layer described in artificial ecology packing layer selects particle diameter to be 4～8mm, thickness is 100～200mm；The cobble-stone that described cobble-stone packing layer selects particle diameter to be 8～16mm, thickness is 100～200mm；Described shuck filling layer selects the Concha Ostreae granule of 16～32mm, and thickness is 400～500mm；Described cobble-stone packing layer selects the cobble-stone of 8～16mm, and thickness is 100～200mm；The fly ash grain that described flyash packing layer selects particle diameter to be 4～8mm, thickness is 400～500mm；The quartz sand that described fine quartz sand protective layer selects particle diameter to be 1～2mm, thickness is 100～200mm.
Arranging the purpose of artificial ecology filter bed in processing technological flow is to carry out microorganism-plant combined process to be difficult to low concentration heavy metal water up to standard after process upstream materializing strategy.Because using physico-chemical process very low to 1～3mg/L low concentration heavy metal water treatment effeciency, so utilizing microorganism-plant to the absorption of low-concentration heavy metal ions and transformation, the concentration of heavy metal in waste water can be reduced the most further.
Preferred version, described emergent aquactic plant is Sedum alfredii Hance and Thalaspi arvense L., plants between two kinds of plants, density is 8～12 clumps/, 3～4 strains/clump.
Preferred version, plants between submerged plant planting Antirrhinum majus L., Potamogeton maackianu, watermifoil and black algae, and density is 8～10 clumps/, 5～7 strains/clump.
Preferred version, described enriching heavy metal plant be Herba pteridis vittatae, plantation artificial modified soil 9 upper density be 10～12 clumps/, 6～8 strains/clump.
Using said system, a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment method, concrete steps include:
First, artificial ecology filter bed is debugged and biofilm:
(1) choosing certain heavy metal sewage sludge stockyard and carry out sample collecting, the dominant strain obtaining effectively removing low concentration through laboratory separation screening is sulfur oxide acidfast bacilli and thiobacillus ferrooxidant, tames at laboratory, and it is stand-by to be configured to bacterium solution；
(2) be built into marsh mud and heavy metal sewage sludge at pilot scale room bacterium solution incubator, add water mixing sludge 300L～350L that preparation sludge concentration is 9000～10000mg/L, and add nutrient substance, by 1/20～1/10 importing bacterium solution of sludge quantity, batch (-type) opens low-speed mixer, open 30～40 minutes, stop 30～40 minutes, stir 10～12 hours every day, control temperature 20 DEG C～25 DEG C, pH8～9, dissolved oxygen DO≤1.0mg/L, through the cultivation of 7-8 days, liquid becomes pink shape, obtains dominant bacteria；
(3) in artificial ecology filter bed, add, by bed appearance 2/3, the municipal sewage that moisture content is 98% more than, sludge concentration is 4000～5000mg/L, by 1/5～the 1/4 of mud amount, dominant bacteria imported artificial ecology filter bed, within every 2～3 days, import once, it imports 4～5 times, control temperature 20～25 DEG C, pH7～11, dissolved oxygen DO≤0.5mg/L, through 8-10 days time, the various fillers making artificial ecology packing layer described in artificial ecology filter bed become brown-black glue-like, show biofilm success on filler；Now, abundant microorganism is just absorbed and fixed on filler, forms dominant microflora；After debugging, the temperature 20 of control artificial ecology filter bed～30 DEG C, dissolved oxygen DO≤0.5mg/L, pH 7～11；Natural soil layer in artificial ecology filter bed is planted and has emergent aquactic plant, rich in there being multiple-microorganism in the root system of emergent aquactic plant, with the dominant microflora synergy on filler, common enriching heavy metal ion；
Then, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system carries out commencement of commercial operation, comprises the steps:
(1) heavy metal Tailings Dam percolate enter homogenizing regulating reservoir water quality is carried out all with, the water yield is adjusted；
(2) all with after water outlet enter pH adjust pond, adjust pH to 8～9；
(3) water outlet after pH adjusts enters electrochemical apparatus and carries out cell reaction, adjusts pH to 8～10.5 simultaneously；
(4) the water outlet entrance Aeration tank after electrochemical apparatus processes carries out aeration agitation and oxidation reaction, adds flocculant at this to carry out flocculation reaction；
(5) water outlet after Aeration tank processes enters back into tube settler and removes pollutant flocculation；
(6) supernatant after tube settler processes is pumped to artificial ecology filter bed, is entered artificial ecology oxidation canal, last pressurized rear reuse or be discharged into neighbouring water body by bottom distributing room for water injection after artificial ecology bed processes；Base sludge after tube settler processes enters sludge-tank, and the mud in sludge-tank returns Tailings Dam after treatment, and filtrate returns homogenizing regulating reservoir.
Processing means periphery backfill artificial modified soil, artificial modified grown on soil enriching heavy metal plant, described artificial modified soil is the soil according to the configuration of following quality proportioning: native clay accounts for 60%, Calx accounts for 20%, flyash accounts for 5%, humic acid accounts for 5%, and trace copper, ferrum, zinc, boron, molybdenum respectively account for 2%.
Dominant microflora in artificial ecology packing layer mainly includes lower microorganism belonging to genus: thiobacillus thiooxidant, thiobacillus ferrooxidant, desulfurization Enterobacter cloaca layer, de-Sulfolobus, desulfurizing bacteria layer, desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces, desulfovibrio desulfurization germ belong to.
Rich in there being multiple-microorganism to include in the root system of emergent aquactic plant: Pseudomonas alba, Flavobacterium, Bacillus alcaligenes, color bacillus, achromobacter, bacillus, Agrobacterium, enterobacteria.
Emergent aquactic plant is Sedum alfredii Hance and Thalaspi arvense L., plants between two kinds of plants.
Compared with prior art, advantage of the present utility model is:
1. pre-treating technology is turned materially with electrochemistry, aeration, precipitation etc.；Single processing system is replaced with Ecological Disposal renovation technique multiplexed combination technology as aftertreatment technology such as artificial ecology filter bed, artificial ecology oxidation canals, really can reach country " urban sewage reutilization industry water standard " (GB/T19923-2005) and the strict water standard of " water environment quality standard " (GB3838-2002) by treated for the heavy metal Tailings Dam percolate of complicated component after repairing, water outlet can directly be discharged or reuse, processes and repairs thoroughly.
2. process structures surrounding is filled out artificial modified soil and planted enriching heavy metal plant, the pollution to local soil can be eliminated.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system；
Fig. 2 is the A-A profile of Fig. 1；
Fig. 3 is the process chart of a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment method；
In the drawings
1-homogenizing regulating reservoir, 1-1-water inlet pipe, 1-2-removes the gred grid,
2-pH adjusts pond, 2-1-air agitator, and 2-2-pH counts, 2-3-the first chemicals dosing plant,
3-electrochemical apparatus pond, 3-1-polar plate bracket, 3-2-pole plate, 3-3-external power source, 3-4-pH regulates system,
4-Aeration tank, 4-1-rotational flow aeration device, 4-2-liquidometer, 4-3-the second chemicals dosing plant,
5-tube settler, 5-1-inclined-tube support, 5-2-inclined tube, discharge pipeline bottom 5-3-, 5-4-elevator pump,
6-sludge-tank, 6-1-mud level meter, 6-2-mud screw pump, 6-3-filter press,
7-artificial ecology filter bed, 7-1-filter plate filter molectron, 7-2-water distribution space, 7-3-supporting layer, 7-4-artificial ecology packing layer, 7-5-emergent aquactic plant,
8-artificial ecology oxidation canal, 8-1-plug-flow dividing plate back and forth, 8-2-submerged plant, 8-3-outlet pipe,
9-artificial modified soil,
10-enriching heavy metal plant.
Detailed description of the invention
With embodiment, this utility model is described further below in conjunction with the accompanying drawings
Embodiment 1
As shown in Figure 1 and Figure 2, one heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system, including processing means, processing means includes that the homogenizing regulating reservoir 1 being sequentially communicated, pH adjust pond 2, electrochemical apparatus pond 3, Aeration tank 4, tube settler 5, artificial ecology filter bed 7, artificial ecology oxidation canal 8, and the side of described tube settler 5 is additionally provided with sludge-tank 6；Homogenizing regulating reservoir 1 is provided with the water inlet pipe 1-1 flowing into processing means for percolate, and artificial ecology oxidation canal 8 is provided with the outlet pipe 8-3 discharging processing means for the percolate after processing.Artificial modified soil 9 is filled in processing means periphery, and plants enriching heavy metal plant 10 on artificial modified soil 9.
Be provided with slagging-off grid 1-2 in homogenizing regulating reservoir 1, remove the waste residue in waste water, the function of homogenizing regulating reservoir be all with water quality, regulating pondage.
PH adjusts and is provided with air stirring pipe 2-1 bottom pond 2, pH adjusts inwall limit, pond 2 and is provided with pH meter 2-2, pH adjustment pond 2 outer edge 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 lime cream and be finely adjusted wastewater pH, and control ph is in the range of 8～9.
It is to be finely adjusted pH that pH adjusts the function in pond, to meet the water quality requirement of subsequent technique electrochemical apparatus.
Electrochemical apparatus pond 3 makes from the channel-section steel being up provided with polar plate bracket 3-1, polar plate bracket 3-1 100 × 10mm at the bottom of pond away from 400mm space；Polar plate bracket 3-1 is provided above with 6 pieces of pole plate 3-2, pole plate 3-2 specification is length × width x thickness=900 × 600 × 8mm, making pole plate 3-2 and external power source 3-3 with iron plate uses unipolar fashion to connect, the pole plate cathode wire i.e. coming odd bits is connected with the negative pole of external power source, and the pole plate positive wire coming even bit is connected with external power source positive pole.Other pH regulator system 7-4 arranged in pond, including acid, alkali tank and compounding system, frequency conversion dosing pump and pH meter, is fine-tuning to 8～10.5 to pH.
The function of electrochemical apparatus is that electrolytic flocculation, electrofloatation and electrolysis oxidation-reduction reaction occur, and waste water is carried out advanced treating.
Aeration tank 4 pond inner bottom part is provided with rotational flow aeration device 4-1, Aeration tank 4 inwall is provided with liquidometer 4-2, Aeration tank 4 outer edge is provided with the second chemicals dosing plant 4-3, second chemicals dosing plant 4-3 adds PAC and PAM in Aeration tank 4, it adds percent concentration and is respectively 8% and 1 ‰, to carry out and to promote flocculation reaction.
The function of Aeration tank is by aeration agitation and Oxidation, and ferrous ion is converted into ferric ion.
In described tube settler 5, middle part is provided with inclined-tube support 5-1, inclined-tube support 5-1 ∠ 50 × 6mm angle steel makes, inclined-tube support 5-1 is provided above with inclined tube 5-2, and inclined tube 5-2 material is Propylene polymerization, and specification is 50mm, a size of 1000 × 500 × 867 (plagioclase) mm, sheet thickness is 0.6mm, is provided with bottom discharge pipeline 5-3 bottom pond, and base sludge is discharged into sludge-tank 6, it is provided with elevator pump 5-4 by pond, water is promoted to artificial ecology filter bed 7 from tube settler 5 and processes.
The function of tube settler: Aeration tank water outlet is carried out solid-liquid separation.
Sludge-tank 6 inwall is provided with mud level meter 6-1, is provided with mud screw pump 6-2 and filter press 6-3 by pond, and mud returns Tailings Dam after treatment, and filtrate returns homogenizing regulating reservoir 1.
Artificial ecology filter bed 7 is up provided with filter plate filter molectron 7-1 at 300mm space from the bottom of bed, filter plate material is steel plate, a size of long × width x thickness=980 × 480 × 10mm, D20 hole is had on steel plate, pitch of holes is 80mm, filter is double filters, a size of × H=80 × 180mm, bed base space and filter plate filter molectron 7-1 composition distributing room for water injection 7-2；Filter plate filter molectron 7-1 is provided above with the cobblestone that supporting layer 7-3, supporting layer 7-3 select particle diameter to be 16～32mm, to support artificial ecology packing layer 7-4 above；Supporting layer is arranged above with artificial ecology packing layer 7-4, artificial ecology packing layer 7-4 totally 7 layers, sets gradually from the bottom up: 1. rubble sand packing layer, and the quartz sand selecting particle diameter to be 4～8mm, thickness is 100mm；2. cobble-stone packing layer, the cobble-stone selecting particle diameter to be 8～16mm, thickness is 100mm；3. shuck filling layer, selects the Concha Ostreae granule of 16～32mm, and thickness is 400mm；4. cobble-stone packing layer, selects the cobble-stone of 8～16mm, and thickness is 100mm；5. flyash packing layer, the fly ash grain selecting particle diameter to be 4～8mm, thickness is 400mm；6. fine quartz sand protective layer, the quartz sand selecting particle diameter to be 1～2mm, thickness is 100mm；7. natural soil layer, thickness is 400mm；It being Sedum alfredii Hance at natural soil layer plantation emergent aquactic plant 7-5, emergent aquactic plant 7-5, plant between Thalaspi arvense L., density is 8～12 clumps/, 3～4 strains/clump.
Arranging the purpose of artificial ecology filter bed in processing technological flow is to carry out microorganism-plant combined process to be difficult to low concentration heavy metal water up to standard after process upstream materializing strategy.Because using physico-chemical process very low to 1～3mg/L low concentration heavy metal water treatment effeciency, so utilizing microorganism-plant to the absorption of low-concentration heavy metal ions and transformation, the concentration of heavy metal in waste water can be reduced the most further.
The debugging of described artificial ecology filter bed 7 and operation method:
(1) choose certain heavy metal sewage sludge stockyard and carry out sample collecting, the dominant strain obtaining effectively removing low concentration through laboratory separation screening is thiobacillus thiooxidans (Thiobacillus thiooxidans) and thiobacillus ferrooxidant (Thiobacillus ferrooxidans), tame at laboratory, and it is stand-by to be configured to bacterium solution.
(2) be built into marsh mud, heavy metal sewage sludge at pilot scale room bacterium solution incubator, add water the mixing sludge 300L that preparation sludge concentration is 9000～10000mg/L, and add the nutrient substance such as a little Testa Tritici, distiller grains, the bacterium solution prepared by 1/15 importing of sludge quantity, batch (-type) is opened low-speed mixer and (is opened 30 minutes, stop 30 minutes), stir 10～12 hours every day, control temperature 20～25 DEG C, pH8～9, dissolved oxygen DO≤1.0mg/L, through the cultivation of 7 days, liquid became pink shape, removes low-concentration heavy metal dominant bacteria and prepares successfully.
(3) in artificial ecology filter bed, add, by bed appearance 2/3, the municipal sewage that moisture content is 99%, sludge concentration is 4000～5000mg/L, by the 1/5 of mud amount, dominant bacteria being imported artificial ecology bed, within every 2 days, import once, it imports 4 times, control temperature 20～25 DEG C, pH7～11, dissolved oxygen DO≤0.5mg/L, through 8 day time, the various fillers of artificial ecology packing layer become brown-black gluing shape, show biofilm success on filler.Now, abundant microorganism is just absorbed and fixed on filler.Owing to being to use dominant bacteria biofilm, the dominant bacteria i.e. introduced and the dominant bacteria through carrier environmental screening and enrichment grown on various fillers during debugging mix, and form dominant microflora.These dominant microfloras and Sedum alfredii Hance, the microbial association effect of Thalaspi arvense L. root system, heavy metal ion has the strongest accumulation ability, is particularly suited for the low-concentration heavy metal ions that general physical chemistry method is difficult to remove.
After debugging, control temperature 20～30 DEG C, dissolved oxygen DO≤0.5mg/L, pH7～11, can proceed to properly functioning.
nullThe ecological bed filler series dominant microflora after cultivating successfully of described hand-stuff mainly includes lower microorganism belonging to genus: thiobacillus thiooxidans Thiobacillus thiooxidans)、Thiobacillus ferrooxidant (Thiobacillus ferrooxidams)、Desulfurization Enterobacter cloaca layer (Desulfotomaculum)、De-Sulfolobus (Desufobacteria)、Desulfurizing bacteria layer (Desulfobacter)、Desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces (Desulfococcus-Desulfonem Desulfosarcina)、Desulfovibrio desulfurization germ belongs to (Desulfovibrio-Desulfomicrobium) etc.；Root system series dominant microflora mainly includes lower microorganism belonging to genus: Pseudomonas alba (Pseudomonas), Flavobacterium (Flavobactreium), Bacillus alcaligenes (Alaligenes), color bacillus (Chromobacter), achromobacter (Actromobacter), bacillus (Bacillus), Agrobacterium (Agrobacterim), enterobacteria (Enterobacteriaceae) etc..
The dominant microflora homobium of mentioned microorganism-plant combined process and reparation well adsorbs and the cadmium of low concentration, chromium, lead, zinc, nickel, copper and metalloid arsenic etc. in enriching heavy metal waste water, its mechanism is: have electrostatic adsorption, the catalyzed conversion effect of enzyme, complexing, flocculation and coprecipitated effect according to the efficient dominant microflora homobium heavy metal ion cultivated, cushioning effect to pH so that the adsorbed enrichment of low-concentration heavy metal ions, heavy collection and removed.
The function of artificial ecology filter bed: use plant-microorganism United Technologies, process physical chemistry method to be difficult to the low concentration heavy metal water removed.
Artificial ecology oxidation canal 8 is internal is vertically arranged with plug-flow dividing plate 8-1 back and forth, plants planting submerged plant 8-2 bottom canal, and submerged plant 8-2 kind is planted and planted between Antirrhinum majus L., Potamogeton maackianu, watermifoil and black algae, and density is 8～10 clumps/, 5～7 strains/clump.
Artificial modified soil 9 is that the formula of artificial modified soil 9 is: native clay accounts for 60%, and Calx accounts for 20%, and flyash accounts for 5%, and humic acid accounts for 5%, and trace copper, ferrum, zinc, boron, molybdenum respectively account for 2% at the soil moved in improve the original of processing means periphery backfill.Artificial modified soil 9 width that processing means periphery is filled out is 30m.
Enriching heavy metal plant 10 be Herba pteridis vittatae, plantation on artificial modified soil 9, density is 10～12 clumps/, 6～8 strains/clump.One season of Herba pteridis vittatae gathers in once.
With the heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system described in embodiment 1, certain Pb-Zn tailings storehouse heavy metal percolate is processed and restoration of the ecosystem, as it is shown on figure 3, concrete steps include:
First, artificial ecology filter bed is debugged and biofilm:
(1) choosing certain heavy metal sewage sludge stockyard and carry out sample collecting, the dominant strain obtaining effectively removing low concentration through laboratory separation screening is sulfur oxide acidfast bacilli and thiobacillus ferrooxidant, tames at laboratory, and it is stand-by to be configured to bacterium solution；
(2) be built into marsh mud and heavy metal sewage sludge at pilot scale room bacterium solution incubator, add water mixing sludge 300L～350L that preparation sludge concentration is 9000～10000mg/L, and add nutrient substance, by 1/20～1/10 importing bacterium solution of sludge quantity, batch (-type) opens low-speed mixer, open 30～40 minutes, stop 30～40 minutes, stir 10～12 hours every day, control temperature 20 DEG C～25 DEG C, pH8～9, dissolved oxygen DO≤1.0mg/L, through the cultivation of 7-8 days, liquid becomes pink shape, obtains dominant bacteria；
(3) in artificial ecology filter bed, add, by bed appearance 2/3, the municipal sewage that moisture content is 98% more than, sludge concentration is 4000～5000mg/L, by 1/5～the 1/4 of mud amount, dominant bacteria imported artificial ecology filter bed, within every 2～3 days, import once, it imports 4～5 times, control temperature 20～25 DEG C, pH7～11, dissolved oxygen DO≤0.5mg/L, through 8-10 days time, the various fillers making artificial ecology packing layer described in artificial ecology filter bed become brown-black glue-like, show biofilm success on filler；Now, abundant microorganism is just absorbed and fixed on filler, forms dominant microflora；After debugging, the temperature 20 of control artificial ecology filter bed～30 DEG C, dissolved oxygen DO≤0.5mg/L, pH 7～11；Natural soil layer in artificial ecology filter bed is planted and has emergent aquactic plant, rich in there being multiple-microorganism in the root system of emergent aquactic plant, with the dominant microflora synergy on filler, common enriching heavy metal ion；
Then, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system carries out commencement of commercial operation, comprises the steps:
(1) heavy metal Tailings Dam percolate enter homogenizing regulating reservoir water quality is carried out all with, the water yield is adjusted；
(2) all with after water outlet enter pH adjust pond, adjust pH to 8～9；
(3) water outlet after pH adjusts enters electrochemical apparatus and carries out cell reaction, adjusts pH to 8～10.5 simultaneously；
(4) the water outlet entrance Aeration tank after electrochemical apparatus processes carries out aeration agitation and oxidation reaction, adds flocculant at this to carry out flocculation reaction；
(5) water outlet after Aeration tank processes enters back into tube settler and removes pollutant flocculation；
(6) supernatant after tube settler processes is pumped to artificial ecology filter bed, is entered artificial ecology oxidation canal, last pressurized rear reuse or be discharged into neighbouring water body by bottom distributing room for water injection after artificial ecology bed processes；Base sludge after tube settler processes enters sludge-tank, and the mud in sludge-tank returns Tailings Dam after treatment, and filtrate returns homogenizing regulating reservoir.
Processing means periphery backfill artificial modified soil, artificial modified grown on soil enriching heavy metal plant, described artificial modified soil is the soil according to the configuration of following quality proportioning: native clay accounts for 60%, Calx accounts for 20%, flyash accounts for 5%, humic acid accounts for 5%, and trace copper, ferrum, zinc, boron, molybdenum respectively account for 2%.
Dominant microflora in artificial ecology packing layer mainly includes lower microorganism belonging to genus: thiobacillus thiooxidant, thiobacillus ferrooxidant, desulfurization Enterobacter cloaca layer, de-Sulfolobus, desulfurizing bacteria layer, desulfurization coccus-desulfurization line bacterium desulfurization Sarcinomyces, desulfovibrio desulfurization germ belong to.
Rich in there being multiple-microorganism to include in the root system of emergent aquactic plant: Pseudomonas alba, Flavobacterium, Bacillus alcaligenes, color bacillus, achromobacter, bacillus, Agrobacterium, enterobacteria.
Emergent aquactic plant is Sedum alfredii Hance and Thalaspi arvense L., plants between two kinds of plants.
Its main design parameters is:
1. the water yield: 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) homogenizing regulating reservoir
The design time of staying: 8h
Design size: L × W × H=25 × 20 × 4 (m)
Thick, each one of fine fack is inside set
(2) pH adjusts pond
The design time of staying: 20min
Design size: L × W × H=6 × 6 × 4 (m)
It is equipped with: stirring pipe 1 is overlapped, and pH meter 1, chemicals dosing plant 1 overlaps
(3) electrochemical apparatus pond
Design size: L*W*H=10*10*3 (m)
It is equipped with: single-beam crane 1, pH regulator system 1 is overlapped
Electrochemical apparatus power supply: three-phase 5 line system, 380V
Configuration power: 60kw
Pole plate module: 1.0t
The time of staying: 10min
Commutation cycle: 15min
Pole plate consumes: 30-120g/m3
(4) Aeration tank
The design time of staying: 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；Rotational flow aeration device 138 overlaps, and liquidometer 1, chemicals dosing plant 2 overlaps
(5) tube settler
The design time of staying: 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
The time of staying: 4h
Design size: L × W × H=12.5 × 10 × 4 (m)
It is equipped with: mud screw pump 2, the using and the reserved, flow 20m3/ h, lift 120m；Filter press 1
(7) artificial ecology filter bed
The time of staying: 12h
Design size: L × W × H=40 × 30 × 2.5 (m)
It is equipped with: 7 kinds of ecological fillers, plants 4 kinds of emergent aquactic plants
(8) artificial ecology oxidation canal
The time of staying: 24h
Design size: L × W × H=400 × 30 × 2.5 (m)
It is equipped with: 4 roads dividing plate back and forth, at the bottom of canal, plants 4 kinds of submerged plants
(9) in the range of the 30m of processing means periphery, backfill artificial modified soil and plant Herba pteridis vittatae.
Water quality after treatment: lead≤0.1mg/L, zinc≤3.0mg/L, cadmium≤0.01mg/L, arsenic≤0.005mg/L, reach or be better than country's " urban sewage reutilization industry water standard " GB/T 19923-2005 and " surface water environment quality " GB3838-2002 III class water standard.
Claims (10)
1. a heavy metal species Tailings Dam percolate multiplexed combination ecological treatment system, including processing means, it is characterized in that, described processing means includes that the homogenizing regulating reservoir (1) being sequentially communicated, pH adjust pond (2), electrochemical apparatus pond (3), Aeration tank (4), tube settler (5), artificial ecology filter bed (7) and artificial ecology oxidation canal (8), and the side of described tube settler (5) is additionally provided with sludge-tank (6)；Described homogenizing regulating reservoir (1) is provided with the water inlet pipe (1-1) flowing into processing means for percolate, and artificial ecology oxidation canal (8) is provided with the outlet pipe (8-3) discharging processing means for the percolate after processing；
Described artificial ecology filter bed (7) is from being up provided with filter plate filter molectron (7-1), bed base space and filter plate filter molectron (7-1) composition distributing room for water injection (7-2) at the bottom of bed at 200mm～400mm space；Filter plate filter molectron (7-1) is arranged over supporting layer (7-3); described supporting layer (7-3) is arranged over artificial ecology packing layer (7-4), and described artificial ecology packing layer (7-4) includes rubble sand packing layer, cobble-stone packing layer, shuck filling layer, cobble-stone packing layer, flyash packing layer, fine quartz sand protective layer, natural soil layer the most successively；Described natural soil layer is planted and is implanted with emergent aquactic plant (7-5)；
Internal plug-flow dividing plate (8-1) back and forth that be vertically arranged with of described artificial ecology oxidation canal (8), planting submerged plant (8-2) is planted in artificial ecology oxidation canal (8) bottom.
Heavy metal Tailings Dam percolate multiplexed combination ecological treatment system the most according to claim 1, it is characterized in that, artificial modified soil (9) is filled in described processing means periphery, and at artificial modified soil (9) upper plantation enriching heavy metal plant (10).
The most according to claim 1, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system, is characterized in that, is provided with slagging-off grid (1-2) in described homogenizing regulating reservoir (1).
Heavy metal Tailings Dam percolate multiplexed combination ecological treatment system the most according to claim 1, it is characterized in that, described pH adjusts bottom, pond (2) and is provided with air stirring pipe (2-1), pH adjusts pond (2) inwall limit and is provided with pH meter (2-2), and pH adjusts pond (2) outer edge and is provided with the first chemicals dosing plant (2-3).
The most according to claim 1, heavy metal Tailings Dam percolate multiplexed combination ecological treatment system, is characterized in that, described electrochemical apparatus pond (3) pond outer edge arranges pH regulator system (3-4).
Heavy metal Tailings Dam percolate multiplexed combination ecological treatment system the most according to claim 1, it is characterized in that, described Aeration tank (4) pond inner bottom part is provided with rotational flow aeration device (4-1), Aeration tank (4) inwall is provided with liquidometer (4-2), and Aeration tank (4) outer edge is provided with the second chemicals dosing plant (4-3).
Heavy metal Tailings Dam percolate multiplexed combination ecological treatment system the most according to claim 1, it is characterized in that, in described tube settler (5), middle part is provided with inclined-tube support (5-1), inclined-tube support (5-1) is provided above with inclined tube (5-2), tube settler (5) bottom is provided with the bottom discharge pipeline (5-3) that base sludge is discharged into sludge-tank (6), and tube settler (5) is outside equipped with the elevator pump (5-4) that water is promoted to artificial ecology filter bed from tube settler (5).
Heavy metal Tailings Dam percolate multiplexed combination ecological treatment system the most according to claim 1, it is characterized in that, described sludge-tank (6) inwall is provided with mud level meter (6-1), and sludge-tank (6) is outside equipped with mud screw pump (6-2) and filter press (6-3).
Heavy metal Tailings Dam percolate multiplexed combination ecological treatment system the most according to claim 1, it is characterized in that, described electrochemical apparatus pond (3) includes the polar plate bracket (3-1) being arranged on 300mm-500mm above at the bottom of pond, 2N block pole plate (3-2) being installed in parallel on polar plate bracket (3-1), N >=1, the pole plate cathode wire wherein coming odd bits is connected with the negative pole of external power source, and the pole plate positive wire coming even bit is connected with external power source positive pole.
10. according to one of claim 1-9 described heavy metal Tailings Dam percolate multiplexed combination ecological treatment system, it is characterized in that, the quartz sand that rubble sand packing layer described in described artificial ecology packing layer (7-4) selects particle diameter to be 4～8mm, thickness is 100～200mm；The cobble-stone that described cobble-stone packing layer selects particle diameter to be 8～16mm, thickness is 100～200mm；Described shuck filling layer selects the Concha Ostreae granule of 16～32mm, and thickness is 400～500mm；Described cobble-stone packing layer selects the cobble-stone of 8～16mm, and thickness is 100～200mm；The fly ash grain that described flyash packing layer selects particle diameter to be 4～8mm, thickness is 400～500mm；The quartz sand that described fine quartz sand protective layer selects particle diameter to be 1～2mm, thickness is 100～200mm.
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|---|---|---|---|
| CN201620268652.8U CN205556398U (en) | 2016-04-01 | 2016-04-01 | Heavy metal tailing storehouse filtration liquid tuple symphysis attitude processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621819A (en) * | 2016-04-01 | 2016-06-01 | 湖南艾布鲁环保科技有限公司 | Heavy metal tailing pond leachate multielement combination ecological treatment system and method |
| CN112441686A (en) * | 2020-11-17 | 2021-03-05 | 张家港市绿岩环境科技有限公司 | Drainage system for treating abandoned mine |
-
2016
- 2016-04-01 CN CN201620268652.8U patent/CN205556398U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621819A (en) * | 2016-04-01 | 2016-06-01 | 湖南艾布鲁环保科技有限公司 | Heavy metal tailing pond leachate multielement combination ecological treatment system and method |
| CN112441686A (en) * | 2020-11-17 | 2021-03-05 | 张家港市绿岩环境科技有限公司 | Drainage system for treating abandoned mine |
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