CN105130075B - Treatment method of hazardous waste landfill leachate - Google Patents
Treatment method of hazardous waste landfill leachate Download PDFInfo
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- CN105130075B CN105130075B CN201510402526.7A CN201510402526A CN105130075B CN 105130075 B CN105130075 B CN 105130075B CN 201510402526 A CN201510402526 A CN 201510402526A CN 105130075 B CN105130075 B CN 105130075B
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- 238000000034 method Methods 0.000 title abstract description 37
- 239000000149 chemical water pollutant Substances 0.000 title abstract description 10
- 239000002920 hazardous waste Substances 0.000 title description 6
- 239000002699 waste material Substances 0.000 claims abstract description 52
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000001704 evaporation Methods 0.000 claims abstract description 26
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- 239000003513 alkali Substances 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 14
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- 230000016615 flocculation Effects 0.000 claims abstract description 13
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- 238000007711 solidification Methods 0.000 claims abstract description 3
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- 229920000647 polyepoxide Polymers 0.000 claims description 16
- 238000003795 desorption Methods 0.000 claims description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 11
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 11
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 11
- 239000000920 calcium hydroxide Substances 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 11
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 11
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 239000002351 wastewater Substances 0.000 claims description 10
- 239000000701 coagulant Substances 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 239000012798 spherical particle Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 239000013618 particulate matter Substances 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 15
- 150000002500 ions Chemical class 0.000 abstract description 6
- 238000004064 recycling Methods 0.000 abstract description 3
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- 238000001556 precipitation Methods 0.000 abstract description 2
- 231100000331 toxic Toxicity 0.000 abstract description 2
- 230000002588 toxic effect Effects 0.000 abstract description 2
- 238000002386 leaching Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 239000005416 organic matter Substances 0.000 description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 235000011941 Tilia x europaea Nutrition 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000004571 lime Substances 0.000 description 5
- 229910052785 arsenic Inorganic materials 0.000 description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 4
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
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- 229930185605 Bisphenol Natural products 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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- 229920000742 Cotton Polymers 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
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- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
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Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Physical Water Treatments (AREA)
- Removal Of Specific Substances (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses a method for treating dangerous waste landfill leachate, which comprises the steps of alkali adjustment, flocculation and precipitation, mud-water separation, ammonia nitrogen stripping, evaporation concentration and solidification landfill. The method for treating the dangerous waste landfill leachate realizes the reduction, harmlessness and recycling of the dangerous waste leachate to the maximum extent, does not cause the loss of heavy metal ions, highly toxic organic matters and salt in the treatment process, does not generate secondary pollution, does not cause load impact on subsequent treatment, and is a good method for treating the dangerous waste leachate. The method is suitable for treating the percolate of most dangerous waste landfill sites, and has wide popularization range.
Description
Technical field
The present invention relates to the treatment technologies of industrial wastewater, and in particular to a kind of processing side of hazardous waste landfill percolate
Method.
Background technology
Hazardous waste（Abbreviation dangerous waste）Landfill percolate is due to the extruding of landfill heap body, rainwater leaching in dangerous waste landfill yard
Or the sewage that groundwater erosion generates, wherein containing a large amount of polluters, environment is caused potentially to threaten.
Often contain from industries such as plating, pesticide, petrochemical industry and fine chemistry industries in the hazardous waste of dangerous waste landfill yard landfill
All kinds of organic and inorganic pollution, and very high concentrations.
Pollutant includes in dangerous waste percolate：Ammonia nitrogen, heavy metal ion, high poison organic matter, salinity and cyanide etc..It is common
Leachate processing method include：Biochemical treatment, chemical oxidation treatment, recharge processing, film process and evaporation and concentration processing.Due to
Percolate biodegradability is very poor, it is difficult to be handled using biochemical and recharge method；Chemical oxidization method processing needs to consume big
The chemical reagent of amount, if hydrogen peroxide common in Fenton process is expensive, processing cost is high；Membrane processing method oozes house refuse
Filtrate treatment effect is good, but the dangerous waste percolate more, more complicated to heavy metal ion can not be applicable in；It is conventional to be concentrated by evaporation
Often contain ammonia nitrogen in the condensate liquid that method obtains, need ability qualified discharge after being further processed, this has undoubtedly aggravated disposition significantly
Cost.
About the processing method of percolate, Chinese patent literature CN 1872745A（Application number：200610034517.8）It is public
A kind of processing method has been opened, has been included the following steps：Landfill leachate, is added flocculant and wadded a quilt with cotton by pretreatment under alkaline condition
Solidifying preformed precipitate；After alkalization part denitrogenation is carried out through circulation blow-removing pond and stripping tower；It is anti-that anaerobism is carried out in UASB anaerobic reactors
It should；Aerobic Process for Treatment is carried out using two-stage catalytic oxidation；MBR film process is carried out in membrane biological reaction pond；MBR film process will be passed through
Percolate further handled with nanofiltration.This method is adopted in consumer waste infiltration liquid after metal and ammonia nitrogen carry out removing processing
Organic matter is handled, and the method for using film process further removes the ion in water removal with biochemical method, but for containing a large amount of salt
Part, heavy metal, toxic organic compound hazardous waste percolate because biodegradability is excessively poor, it is difficult to using biological disposal unit,
In addition a large amount of salt can block membrane channels, need to be replaced frequently film, this will greatly improve cost of disposal.
102329057 A of Chinese patent literature CN（Application number 201110266979.3）Disclose a kind of ammonia nitrogen in high density
The processing method of landfill leachate, first by lime and landfill leachate in neutralization pond in and, be then introduced into first order reaction and precipitate
Lime after precipitation removal neutralizes in pond, the lime after the neutralization can again be filled as city waste residue；Step 1 will be passed through to handle
Landfill leachate afterwards is delivered to Ammonia blowing-out tower and is carried out deamination reaction by pumping, and ammonia-contaminated gas is discharged into air through air duct, after deamination
Landfill leachate is handled through second order reaction sedimentation basin, reduces excessively high pH value；It will treated that landfill leachate is led through step 2
Enter anaerobic pond, using common anaerobic nitrification, residence time 10d；It is anti-that parallel connection SBR is imported by the landfill leachate that step 3 is handled
Pond is answered to handle；Will by step 4 processing percolate import coagulating basin, further reduced in coagulating basin ammonia nitrogen, heavy metal from
Son, the sludge that coagulating basin generates burn after concentrating.This method is similar with aforementioned patent CN 1872745A, relatively low to toxicity
Consumer waste infiltration liquid have preferable effect, but Anaerobic Treatment therein, SBR processing units are due to micro- life in dangerous waste percolate
Object is difficult to survive, and this kind of technique will be difficult to be applicable in, and this is difficult to make discharged wastewater met the national standard, there is the risk for causing secondary pollution；It should
The unprocessed realization qualified discharge of lime in method after first order reaction must not be filled directly, and otherwise wherein pollutant will filled out
Formation " endless loop " between percolate and dangerous waste is buried, and causes secondary pollution；The ammonia direct emission that stripping goes out not only wastes money
Source returns environment and causes larger pressure.
Invention content
The technical problems to be solved by the invention be to provide it is a kind of realize minimizing, innoxious and recycling danger is given up
The processing method of object landfill percolate.
The technical solution for realizing the object of the invention is a kind of processing method of dangerous waste landfill percolate, including following step
Suddenly：
1. alkali tune, into dangerous waste landfill percolate plus alkali adjusts pH value so that the pH value of percolate is 9.5~11.
2. flocculation sediment adds in coagulant and flocculant into the material after step 1. middle alkali tune, percolate divides after standing
Layer, obtains mud mixture.
3. the mud mixture of step 2. in mud and water separating equipment is carried out mud-water separation, collects upper strata by mud-water separation
Clear liquid and flocculation sludge.
4. ammonia-nitrogen desorption, the pH value of supernatant liquor that 3. first detecting step obtains before stripping and the pH value for controlling supernatant liquor
It is 10~11, the supernatant liquor that 3. mud-water separation is obtained between 10~11 the step of by pH value is transferred in ammonia nitrogen blowing-off device
Stripping is carried out, ammonia nitrogen value is less than 35mg/L in stripping to clear liquid.
5. be concentrated by evaporation, before evaporation and concentration first detecting step 4. after ammonia-nitrogen desorption clear liquid pH value, control ammonia nitrogen blows
The pH value of clear liquid is 10~12 after de-；Then clear liquid is transferred to and be concentrated into original volume 1/3 is evaporated in evaporator
~1/10.
6. curing landfill, the flocculation sludge of evaporation concentrated solution and step 3. of step 5. is uniformly mixed to obtain mixture,
Sodium sulfide solution is added in into mixture and is stirred evenly, then hydrated lime in powder is added in into mixed material, is persistently stirred evenly；It connects
It and gesso is slowly added into mixed material under stirring, stir to material shape glomeration particulate matter；Treat above-mentioned ball
After shape particulate matter dry solidification, extracting epoxy resin is mixed with spherical particle object, and epoxy resin is made uniformly to coat material；Then add in
Epoxy curing agent, at this time material become immediately sticky；Material is put into cement specimen mold, firming body is placed 2 after demoulding
~3 angel's particle outer layer epoxy resin cures fill afterwards completely.
2. coagulant that above-mentioned steps add in is polyaluminium aluminum water solution, and the flocculant of addition is polyacrylamide；It is mixed
After solidifying agent and flocculant finish, a concentration of 40~60 mg/L of aluminium polychloride in material；A concentration of the 8 of polyacrylamide~
15 mg/L。
Above-mentioned steps are 4. before ammonia-nitrogen desorption, if step 3. the supernatant liquor that mud-water separation obtains pH value 10~11 it
Between, then it is not required to adjusting pH value and directly carries out stripping；If the pH value of supernatant liquor is less than 10, into clear liquid plus alkali so that upper strata is clear
The pH value of liquid carries out ammonia-nitrogen desorption again after being 10~11.
As preference, the offgas outlet of ammonia nitrogen blowing-off device is immersed in the container for filling acid.
5. above-mentioned steps are concentrated by evaporation before detecting step 4. after ammonia-nitrogen desorption clear liquid pH value, if pH value 10~
Between 12, then it is not required to adjusting pH value and is directly evaporated concentration；If pH value is not in the range, acid adding or plus alkali adjusting pH value.
The indices of 5. condensate liquid that above-mentioned steps are concentrated by evaporation meet GB8978-1996《Integrated wastewater is arranged
Put standard》Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》The requirement of middle emission limit, can
With direct emission, the in line sewage plant pipe nozzle of condensate liquid.
When above-mentioned steps cure landfill 6., the flocculation sludge of evaporation concentrated solution and step 3. of step 5. is uniformly mixed
Mixture is obtained, the addition of sodium sulfide solution is to add in sodium sulfide solution 40mL, the concentration of sodium sulfide solution per 1kg mixtures
It is 5%~45%；Hydrated lime in powder 150g~300g is added in per 1kg mixtures；Per 1kg mixtures addition gesso 800g~
1000g。
When step cures landfill 6., the mass ratio of epoxy resin and spherical particle object is 1~9: 100；Epoxy resin cure
The volume ratio of agent and epoxy resin is 1: 4.
The present invention has positive effect：（1）The present invention when handling dangerous waste landfill percolate, by ammonia nitrogen from
It detaches in percolate, organic matter, heavy metal and salinity are retained in firming body and fill again；Specifically, it is of the invention
First using flocculated method by particulate matter, partial organic substances and the part removal of heavy metal ions in percolate, to reduce
Follow-up disposition pressure, reduces cost of disposal；Again by stripping process by percolate middle and high concentration ammonia nitrogen removal, finally use is evaporated
Concentration is reduced percolate；The in line sewage treatment plant's pipe nozzle of condensate liquid realizes qualified discharge, flocculation sediment and concentrate
By being filled again after curing, final safe disposal.The method of the present invention is on the one hand so that the row of waste water obtained in processing procedure
It puts index and reaches requirement, on the other hand ensure that each type organic, heavy metal and salinity do not generate secondary pollution, environmental benefit is good
It is good.
（2）The present invention realizes the processing method of dangerous waste landfill percolate the decrement of dangerous waste percolate to the maximum extent
Change, innoxious and recycling, processing procedure does not cause the loss of heavy metal ion, high poison organic matter and salinity, do not generate secondary
Pollution, does not cause load impact to subsequent processing, is the good method of dangerous waste percolate processing.The method of the present invention is suitble to endanger mostly
The processing of waste landfill site percolate, promoted extension are wide.
（3）The present invention carries out stripping under conditions of being first 10~11 in pH value before evaporation and concentration to dangerous waste percolate,
Ensure that under the pH value condition organic matter it is non-volatile or it is few volatilization and ammonia farthest removes, make to have in stripping tail gas
Machine object content reduce and be concentrated by evaporation to the maximum extent after condensate liquid in ammonia nitrogen qualified discharge；In addition, the present invention is in pH value
Concentration is evaporated when 10~12 to percolate, this also further reduced the content of organic matter in condensate liquid, so that cold
Lime set reaches sewage drainage standard, can be in line sewage plant pipe nozzle.
（4）The present invention recycles tail gas ammonia when carrying out stripping to dangerous waste percolate, generates certain economy
Benefit.
Specific embodiment
（Embodiment 1）
The present embodiment processing be A dangerous waste landfill yards percolate, the landfill yard landfill danger wastes（Hereinafter referred to as
Dangerous waste）Mainly electroplating sludge of the surface containing a large amount of greases.
After testing, the pH value of the dangerous waste landfill percolate is a concentration of 21983 mg/L of 7.86, COD, and ammonia nitrogen concentration is
2341 mg/L, copper content is 342 mg/L in heavy metal index, and nickel content is 152 mg/L, other indexs reach GB8978-
1996《Integrated wastewater discharge standard》Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》Middle phase
The requirement of emission limit is closed, the associated emissions limit value in above-mentioned 2 standards see the table below 1.
1 sewage associated emissions limit value of table
| Project | Limit value (mg/L) | Project | Limit value (mg/L) |
| PH values | 6~9（Dimensionless） | Total zinc | 5.0 |
| COD | 500 | Total chromium | 1.5 |
| BOD5 | 300 | Cr VI | 0.5 |
| SS | 400 | Total lead | 1.0 |
| Ammonia nitrogen | 35 | Total cadmium | 0.1 |
| TP | 4.0 | Total nickel | 1.0 |
| Fluoride | 20 | Total arsenic | 0.5 |
| Total copper | 2.0 | Total mercury | 0.05 |
| Total beryllium | 0.005 |
The processing method of the dangerous waste landfill percolate of the present embodiment includes the following steps：
1. alkali tune.Hydrated lime in powder is added in into 2 L dangerous waste landfill percolates and so that the pH value of percolate is 9.5~11；
40 g hydrated lime in powders are added in the present embodiment into percolate, after stirring evenly, the pH value for measuring liquid is 10.85.
2. flocculation sediment.The polymerization chlorine as coagulant of a concentration of 5wt% is added in into the material after step 1. middle alkali tune
Change aluminum water solution（Abbreviation PAC）With the polyacrylamide as flocculant of a concentration of 0.5wt%（Abbreviation PAM）；Coagulant and
After flocculant finishes, a concentration of 50 mg/L of PAC in material；A concentration of 10 mg/L of PAM；It stirs evenly, stands
After 15min, percolate layering is good, obtains mud mixture.
3. mud-water separation.2. step is layered to good mud mixture mud-water separation is carried out in mud and water separating equipment,
Collect supernatant liquor and flocculation sludge.
The optional plate and frame filter press of the mud and water separating equipment, belt filter press, sedimentation basin or run-off；Make in the present embodiment
Mud-water separation is carried out with miniature plate type pressure filter.
4. ammonia-nitrogen desorption.The pH value of the detecting step 3. supernatant liquor that mud-water separation obtains first, controls supernatant liquor
PH value is 10~11, and the pH value of the present embodiment clear liquid at the middle and upper levels is not required to adjust pH value for 10.3；If the pH value of supernatant liquor is less than
10, then hydrated lime in powder is added in into clear liquid and so that the pH value of supernatant liquor is 10~12.
The supernatant liquor that 3. mud-water separation is obtained between 10~11 the step of by pH value is transferred in ammonia nitrogen blowing-off device,
By 18 min of air stripping, ammonia nitrogen value is 23 mg/L in Ci Shi Cheongju liquid.
The offgas outlet of ammonia nitrogen blowing-off device is immersed in the container for filling acid, and the present embodiment is a concentration of using 50mL
The sulfuric acid of 1mol/L recycles stripping tail gas as absorbing liquid, absorbing liquid saturation after repeatedly absorbing, COD concentration in absorbing liquid
It is cleaner for 136 mg/L；The absorbing liquid can be used as landfill yard vegetation ammonia Fertilizer application, work well.
5. it is concentrated by evaporation.First detecting step 4. after ammonia-nitrogen desorption clear liquid pH value, after controlling ammonia-nitrogen desorption
The pH value of clear liquid is 10~12, if pH value is not in the range, acid adding or plus alkali adjusting pH value.The present embodiment detects the pH of clear liquid
It is 8.69 to be worth, addition pulverized limestone and alkali tune, final ph 11.23.
When the pH value of clear liquid is 10~12, transfers them in evaporator and be evaporated the 1/3-1/ for being concentrated into original volume
10.The volume of the concentrated liquid is the 21% of original volume after being concentrated by evaporation in the present embodiment, and evaporation time is 70 min.
The condensate liquid obtained in analysis evaporation process, the pH value of condensate liquid is 10.8, and ammonia-nitrogen content is 5 mg/L, and COD contains
It measures as 214 mg/L, heavy metal does not detect, and other indices meet GB8978-1996《Integrated wastewater discharge standard》
Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》The requirement of middle associated emissions limit value, Ke Yizhi
Run in and put, therefore the in line sewage plant pipe nozzle of condensate liquid.
6. curing landfill.The flocculation sludge of evaporation concentrated solution and step 3. of step 5. is uniformly mixed to obtain mixture,
5%~45% sodium sulfide solution is added in into mixture and is stirred evenly, the addition of sodium sulfide solution is to be added in per 1kg mixtures
Sodium sulfide solution 40mL；Then hydrated lime in powder is added in into mixed material again, is persistently stirred evenly, is added in every 1kg mixtures
Hydrated lime in powder 150g~300g；It is followed by stirring for being slowly added to gesso under state into mixed material, stirs to material and formed
Spherical particle object, the addition of gesso are to add in gesso 800g~1000g per 1kg mixtures.
Above-mentioned spherical particle object is spontaneously dried into 24~48h of curing, takes bisphenol A-type（Trade mark E-44）Epoxy resin with it is spherical
Particulate matter mixes, and epoxy resin is made uniformly to coat material, and the mass ratio of epoxy resin and spherical particle object is 1~9: 100；Then
Epoxy curing agent is added in, material becomes sticky immediately at this time；Material is put into the cement specimen mold of 0.15 m of the length of side, demoulding
It is complete that firming body is placed into 2~3 angel's particle outer layer epoxy resin cures afterwards.The volume of epoxy curing agent and epoxy resin
Than being 1: 4.
According to GB 5086.1-1997《Solid waste-Leaching leaching method inversion method》Powder is carried out to above-mentioned sample
Broken and obtained leachate measures copper content as 2mg/L, and nickel content 5mg/L meets GB 18598-2001《Hazard waste landfill
Contamination control standard》It is required that firming body can be filled directly.
（Embodiment 2）
What the present embodiment was handled is the percolate of B dangerous waste landfill yards, and the dangerous waste of landfill yard landfill is mainly arsenic slag, burns
Flying dust and chemical industry rectification residue.
After testing, the pH of the dangerous waste landfill percolate is a concentration of 11452 mg/L of 8.76, COD, and ammonia nitrogen concentration is
1385 mg/L, arsenic content is 12 mg/L in heavy metal index, and cadmium content is 3 mg/L, other indexs reach GB8978-1996
《Integrated wastewater discharge standard》Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》Middle related row
Put the requirement of limit value.
Remaining is same as Example 1 for the processing method of the dangerous waste landfill percolate of the present embodiment, the difference lies in：
Step 1. in into 2 L dangerous waste landfill percolates add in 20 g of hydrated lime in powder, after stirring evenly, measure liquid pH
Be worth is 10.54.
Step 4. clear liquid 14 min of stripping in ammonia nitrogen blowing-off device at the middle and upper levels, ammonia nitrogen value is 18 mg/ in clear liquid after stripping
L；A concentration of 152 mg/L of COD in tail gas absorption liquid.
5. middle evaporation time is 60 min to step, and the volume of the concentrated liquid is the 27% of original volume at this time.
The condensate liquid obtained in analysis evaporation process, the pH value of condensate liquid is 10.5, and ammonia-nitrogen content is 3 mg/L, and COD contains
It measures as 265 mg/L, heavy metal does not detect, and other indices meet GB8978-1996《Integrated wastewater discharge standard》
Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》The requirement of middle associated emissions limit value, Ke Yizhi
Run in and put, therefore the in line sewage plant pipe nozzle of condensate liquid.
According to GB 5086.1-1997《Solid waste-Leaching leaching method inversion method》Firming body sample is carried out
It crushes and leachate is made, measure arsenic and do not detected with cadmium, meet GB 18598-2001《Hazard waste landfill contamination control standard》
It is required that firming body can be filled directly.
Firming body can be filled directly.
（Embodiment 3）
What the present embodiment was handled is another batch of percolate of A dangerous wastes landfill yard in embodiment 1, and the dangerous waste of this batch landfill is main
It is electroplating sludge, pesticide waste, phosphatization slag.
After testing, the pH of this batch of dangerous waste landfill percolate is a concentration of 13651 mg/L of 9.41, COD, and ammonia nitrogen concentration is
1689 mg/L, Zn content is 113 mg/L in heavy metal index, and copper content is 94 mg/L, other indexs reach GB8978-
1996《Integrated wastewater discharge standard》Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》Middle phase
Close the requirement of emission limit.
Remaining is same as Example 1 for the processing method of the dangerous waste landfill percolate of the present embodiment, the difference lies in：
Step 1. in into 2 L dangerous waste landfill percolates add in hydrated lime in powder 10g, after stirring evenly, measure liquid pH
Be worth is 9.93.
Step 4. clear liquid 15 min of stripping in ammonia nitrogen blowing-off device at the middle and upper levels, ammonia nitrogen value is 22 mg/ in clear liquid after stripping
L；A concentration of 191 mg/L of COD in tail gas absorption liquid.
5. middle evaporation time is 85 min to step, and the volume of the concentrated liquid is the 18% of original volume at this time.
The condensate liquid obtained in analysis evaporation process, the pH value of condensate liquid is 10.6, and ammonia-nitrogen content is 4 mg/L, and COD contains
It measures as 315 mg/L, heavy metal does not detect, and other indices meet GB8978-1996《Integrated wastewater discharge standard》
Grade III Standard and CJ 3082-1999《Sewage is discharged into city sewer water standard》The requirement of middle associated emissions limit value, Ke Yizhi
Run in and put, therefore the in line sewage plant pipe nozzle of condensate liquid.
According to GB 5086.1-1997《Solid waste-Leaching leaching method inversion method》Firming body sample is carried out
It crushes and leachate is made, measure Zn content as 7 mg/L, copper content 3mg/L meets GB 18598-2001《Hazardous waste
Fill contamination control standard》It is required that firming body can be filled directly.
Claims (7)
1. a kind of processing method of dangerous waste landfill percolate, it is characterised in that include the following steps：
1. alkali tune, into dangerous waste landfill percolate plus alkali adjusts pH value so that the pH value of percolate is 9.5~10.85；
2. flocculation sediment adds in coagulant and flocculant into the material after step 1. middle alkali tune, percolate is layered after standing, is obtained
To mud mixture；The coagulant added in is polyaluminium aluminum water solution, and the flocculant of addition is polyacrylamide；Coagulant
After being finished with flocculant, a concentration of 40~60 mg/L of aluminium polychloride in material；A concentration of the 8~15 of polyacrylamide
mg/L；
3. the mud mixture of step 2. in mud and water separating equipment is carried out mud-water separation, collects supernatant liquor by mud-water separation
And flocculation sludge；
4. ammonia-nitrogen desorption, the pH value of supernatant liquor that 3. first detecting step obtains before stripping and the pH value for controlling supernatant liquor are 10
~11, the supernatant liquor that 3. mud-water separation is obtained between 10~11 the step of by pH value, which is transferred in ammonia nitrogen blowing-off device, to carry out
Stripping, ammonia nitrogen value is less than 35mg/L in stripping to clear liquid；
5. be concentrated by evaporation, before evaporation and concentration first detecting step 4. after ammonia-nitrogen desorption clear liquid pH value, control ammonia-nitrogen desorption knot
The pH value of clear liquid is 10~12 after beam；Then clear liquid is transferred to and be concentrated into original volume 1/3~1/ is evaporated in evaporator
10；
6. curing landfill, the flocculation sludge of evaporation concentrated solution and step 3. of step 5. is uniformly mixed to obtain mixture, to mixed
It closes and sodium sulfide solution is added in object and is stirred evenly, then hydrated lime in powder is added in into mixed material, persistently stir evenly；Then exist
Gesso is slowly added under stirring into mixed material, is stirred to material shape glomeration particulate matter；Treat above-mentioned spherical
After grain object dry solidification, extracting epoxy resin is mixed with spherical particle object, and epoxy resin is made uniformly to coat material；Then add in epoxy
Resin curing agent, at this time material become immediately sticky；Material is put into cement specimen mold, is placed firming body 2~3 days after demoulding
Particle outer layer epoxy resin cure is made to fill afterwards completely.
2. the processing method of dangerous waste landfill percolate according to claim 1, it is characterised in that：Step 4. ammonia-nitrogen desorption
Before, if the pH value of the step 3. supernatant liquor that mud-water separation obtains between 10~11, is not required to adjust pH value and directly be blown
It is de-；If the pH value of supernatant liquor is less than 10, alkali is added to carry out ammonia again after the pH value of supernatant liquor is caused to be 10~11 into clear liquid
Nitrogen stripping.
3. the processing method of dangerous waste landfill percolate according to claim 2, it is characterised in that：Ammonia nitrogen blowing-off device
Offgas outlet is immersed in the container for filling acid.
4. the processing method of dangerous waste landfill percolate according to claim 1, it is characterised in that：5. step is concentrated by evaporation
Before detecting step 4. after ammonia-nitrogen desorption clear liquid pH value, if pH value between 10~12, be not required to adjust pH value it is direct
It is evaporated concentration；If pH value is not in the range, acid adding or plus alkali adjusting pH value.
5. the processing method of dangerous waste landfill percolate according to claim 4, it is characterised in that：It is concentrated by evaporation what is obtained
The indices of condensate liquid meet GB8978-1996《Integrated wastewater discharge standard》Grade III Standard and CJ 3082-1999《It is dirty
Water is discharged into city sewer water standard》The requirement of middle emission limit can be taken over direct emission, the in line sewage plant of condensate liquid
Mouthful.
6. the processing method of dangerous waste landfill percolate according to claim 1, it is characterised in that：6. step cures landfill
When, the flocculation sludge of evaporation concentrated solution and step 3. of step 5. is uniformly mixed to obtain mixture, sodium sulfide solution adds
It is that sodium sulfide solution 40mL is added in per 1kg mixtures to enter amount, a concentration of the 5%~45% of sodium sulfide solution；Add in per 1kg mixtures
Enter hydrated lime in powder 150g~300g；Gesso 800g~1000g is added in per 1kg mixtures.
7. the processing method of dangerous waste landfill percolate according to claim 1, it is characterised in that：6. step cures landfill
When, the mass ratio of epoxy resin and spherical particle object is 1~9: 100.
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| CN108911324A (en) * | 2018-07-03 | 2018-11-30 | 武汉天源环保股份有限公司 | Liquid processing method is concentrated by evaporation after landfill leachate film process |
| CN110040839B (en) * | 2019-05-08 | 2022-12-16 | 山东生态家园环保股份有限公司 | Composition for treating fruit and vegetable garbage and preparation method thereof |
| CN110759571B (en) * | 2019-10-31 | 2021-06-11 | 广东闻扬环境科技有限公司 | Fly ash leachate treatment system and treatment method |
| CN111829914B (en) * | 2020-06-12 | 2021-12-31 | 同济大学 | System for testing pollutant interception performance of domestic garbage leachate-based hydrogel |
| CN114573170A (en) * | 2021-05-26 | 2022-06-03 | 河南中环信环保科技股份有限公司 | Process method for concentrating, curing and burying complex high-salinity wastewater |
| CN113371905B (en) * | 2021-05-27 | 2023-01-13 | 南京万德斯环保科技股份有限公司 | Treatment method of high-ammonia nitrogen high-salinity leachate |
| CN115536193A (en) * | 2022-06-24 | 2022-12-30 | 鄂尔多斯市环保投资有限公司 | Harmless comprehensive treatment method for operation and maintenance waste liquid detection and analysis |
| CN118084241B (en) * | 2024-03-13 | 2024-09-20 | 湖北鄂农垦农业科技有限公司 | Phosphogypsum percolate treatment method, solid-liquid treatment equipment and phosphogypsum percolate treatment system |
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