CN108675518A - A kind of preprocess method of aged refuse in MSW landfill percolate - Google Patents
A kind of preprocess method of aged refuse in MSW landfill percolate Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 230000001699 photocatalysis Effects 0.000 claims abstract description 51
- 238000001179 sorption measurement Methods 0.000 claims abstract description 49
- 238000007146 photocatalysis Methods 0.000 claims abstract description 48
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 30
- 238000003795 desorption Methods 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 238000002386 leaching Methods 0.000 claims abstract description 7
- 239000003463 adsorbent Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 20
- 230000001105 regulatory effect Effects 0.000 claims description 20
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000005416 organic matter Substances 0.000 claims description 11
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 10
- 238000005273 aeration Methods 0.000 claims description 10
- 235000019441 ethanol Nutrition 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 10
- 239000002002 slurry Substances 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- PQLVXDKIJBQVDF-UHFFFAOYSA-N acetic acid;hydrate Chemical compound O.CC(O)=O PQLVXDKIJBQVDF-UHFFFAOYSA-N 0.000 claims description 7
- 235000013495 cobalt Nutrition 0.000 claims description 7
- 230000005684 electric field Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 5
- 230000005685 electric field effect Effects 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000011026 diafiltration Methods 0.000 claims description 2
- 239000000149 chemical water pollutant Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 6
- 231100000331 toxic Toxicity 0.000 abstract description 5
- 230000002588 toxic effect Effects 0.000 abstract description 5
- 239000010802 sludge Substances 0.000 abstract description 3
- 231100000611 venom Toxicity 0.000 abstract description 3
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 229910052785 arsenic Inorganic materials 0.000 description 6
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 6
- 239000010813 municipal solid waste Substances 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 3
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 229940011182 cobalt acetate Drugs 0.000 description 3
- QAHREYKOYSIQPH-UHFFFAOYSA-L cobalt(II) acetate Chemical compound [Co+2].CC([O-])=O.CC([O-])=O QAHREYKOYSIQPH-UHFFFAOYSA-L 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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- 238000003672 processing method Methods 0.000 description 2
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- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
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- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- 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
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
Abstract
The invention discloses a kind of preprocess methods of aged refuse in MSW landfill percolate, include the following steps：The chelating adsorption operations of step a) early stage percolates；The pH value of the aged percolates of step b) adjusts and ammonia-nitrogen desorption operation；Leaching of Heavy Metals operates in step c) photocatalysis adsorption towers；Photochemical catalytic oxidation operation is carried out in step d) photocatalysis adsorption towers；Step e) repeats step a)~step d), so as to carry out serialization early stage percolate and aged percolate collaboration pretreatment operation.The present invention not only increases the biochemical of landfill leachate by the method for cooperateing with processing, and reduce the toxic action of venomous injurant confrontation consequent activities sludge, stable effluent quality, anti impulsion load is strong, meet the influent quality requirement of subsequent biological treatment technique, the processing load for alleviating subsequent biological treatment technique, shortens the cycle of operation of biological treatment.
Description
Technical field
The present invention relates to technical field of sewage more particularly to a kind of pre- places of aged refuse in MSW landfill percolate
Reason method.
Background technology
Landfill leachate is that rubbish passes through complicated physics, chemistry and biological chemistry action during sanitary landfills,
The sewage generated under the influence of extraneous factor.Landfill leachate is divided into two major classes by its landfill age：One kind is early stage percolate,
The time is filled in 5 years hereinafter, generated leachate quality feature is that pH value is relatively low, COD and BOD5Concentration is higher, and BOD5/
The ratio of COD is higher, while the concentration of all kinds of heavy metals is also higher；Another kind of is aged percolate, landfill the time 5 years with
On, the main water quality characteristics of generated percolate are the close neutrality of pH value, COD and BOD5Concentration is relatively low, and BOD5The ratio of/COD
It is worth relatively low, and ammonia nitrogen concentration is higher, and heavy metal concentration is then begun to decline.
Currently, most of landfill yard uses " pretreatment (coagulating sedimentation, ammonia-nitrogen desorption, chemical oxidation, hydrolysis acidification etc.)
The group technology of+biological treatment (anaerobism, anoxic, aerobic etc.)+materialization advanced treating (absorption, UF membrane, advanced oxidation etc.) ",
Water outlet direct emission is included in sewage network.Wherein pretreated method includes mainly Physical, chemical method and bioanalysis etc., is somebody's turn to do
Technique main purpose is the biodegradability for removing ammonia nitrogen or inorganic impurity or improving percolate.
Number of patent application is that the Chinese patent of CN201510092161.2 discloses a kind of place of percolate from garbage filling field
Science and engineering skill, using coagulation air-float or precipitation, ammonia-nitrogen desorption as pretreatment, the pretreating process ammonia nitrogen removal effect is good, can be with
Inorganic impurity is effectively removed, but the technique has the problems such as taking up a large area, can not effectively inhibiting harmful toxic matter.Patent application
Number a kind of processing method of early stage landfill leachate is disclosed for the Chinese patent of CN201310720198.6, treatment process is
Anaerobic reactor and integration denitrification reactor group at biological treatment workshop section+Integral iron-carbon fenton reactor be chemical oxidation
The technical process such as processing section+coagulating sedimentation and filtration treatment, the treatment process using anaerobic reactor as pretreating process,
Most of organic matter degradation in early stage percolate is set to be small organic molecule using the degradation of anaerobe, still,
Due to there are harmful toxic matter, being easy to inhibit the effect of microorganism in percolate, water treatment stability is poor and cannot flexibly fit
The problems such as answering landfill leachate change of water quality.
Invention content
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of diafiltrations of aged refuse in MSW landfill
The preprocess method of liquid, this method processing cost is low, and treatment effeciency is high, and the water quality according to early stage percolate and aged percolate is special
Property, by cooperate with processing method not only increase the biochemical of landfill leachate, and reduce venomous injurant verify after
The toxic action of continuous activated sludge, stable effluent quality, anti impulsion load is strong, and floor space is small, can effectively realize garbage filter
The processing of liquid.
The present invention is achieved by the following technical programs：
A kind of preprocess method of aged refuse in MSW landfill percolate, includes the following steps：
Step a)：The early stage percolate is delivered to the first photocatalysis and inhaled by the early stage percolate for extracting refuse landfill
Attached tower carries out the chelating suction-operated of heavy metal and organic matter, obtains the first processing percolate, and first percolate is imported
Regulating reservoir after adsorption operations run 8~16h, stops charging, early stage percolate is switched to the second photocatalysis adsorption tower, described
It is filled with modified adsorbent in first photocatalysis adsorption tower and the second photocatalysis adsorption tower；
Step b)：The aged percolate is delivered to ammonia-nitrogen stripping tower by the aged percolate for extracting refuse landfill, to
Feeding lime in the ammonia-nitrogen stripping tower, adjusts the pH value of the aged percolate between 10~11, the ammonia-nitrogen stripping tower
Interior setting blast aeration pipe carries out ammonia-nitrogen desorption by the blast aeration pipe, and after running 8~16h, it is aged to obtain that treated
Percolate, and it is classified as second processing percolate and third processing percolate two parts, wherein second processing percolate is direct
Import regulating reservoir；
Step c)：Third processing percolate in step b) is passed through the first photocatalysis adsorption tower in step a)
It is interior, the leaching operation for carrying out 4~8h of heavy metal is contacted with the adsorbent in the first photocatalysis adsorption tower, will be leached containing weight
The aged percolate of metal is sent to heavy metal removing tower, and heavy metal removing operation is carried out under DC electric field effect, is further located
Third processing percolate after reason imports regulating reservoir；
Step d)：The ultraviolet light power supply of step c) the first photocatalysis adsorption towers is opened, the light of organic matter in adsorbent is carried out
Catalysed oxidn；
Step e)：After the completion of the second photocatalysis adsorption tower operation in step a), the behaviour of step a)~step d) is repeated
Make, carries out the collaboration pretreatment operation of the early stage percolate and aged percolate of serialization.
Further, the preparation method of modified adsorbent is in the step a)：By EDTA, four acetate hydrate cobalts and metatitanic acid
Ethyl ester stirring and dissolving under conditions of 30~40 DEG C is dispersed in alcohol solvent, obtains mixed liquor A, continues to stir and will live
Property charcoal particle be added in the mixed liquor A, increase temperature to 60~80 DEG C, continue stirring to etoh solvent volatilization and finish, obtain
The active carbon particle slurry B is placed in nitrogen atmosphere protection stove by active carbon particle slurry B, and temperature programming to 400~
500 DEG C carry out 5~10h of calcining, obtain modified adsorbent.
Further, the mass ratio of the EDTA, four acetate hydrate cobalts, tetraethyl titanate and ethyl alcohol is 8~10: 8~10: 8
~10: 20~50.
Further, the active carbon particle and the mass ratio of mixed liquor A are 8~12: 10~30.
Further, the gas-water ratio in the step b) in ammonia-nitrogen stripping tower is 50~100: 1.
Further, the adsorbent in the third processing percolate and the first photocatalysis adsorption tower in the step c),
Liquid-solid ratio is 3~5：1.
Further, the electric field strength of DC electric field is 0.5~2V/cm in the step c).
Further, the irradiation intensity of the step d) ultraviolet lights is 2500~2800uw/cm2。
Beneficial effects of the present invention are as follows：
The present invention can good, the high and aged percolate of heavy metal concentration biodegradability energy according to early stage percolate biodegradability
The low water quality characteristic of difference, heavy metal concentration not only increases the biochemical of landfill leachate by the method for cooperateing with processing, and
Heavy metal is effectively removed, the toxic action of venomous injurant confrontation consequent activities sludge is reduced；In addition, passing through two kinds of water quality
Mixing can be such that effluent quality more stablizes, and anti impulsion load is stronger, and the influent quality for meeting subsequent biological treatment technique is wanted
It asks, alleviates the processing load of subsequent biological treatment technique, shorten the cycle of operation of biological treatment；And this method is taken up an area
Area is small, and processing cost is low, and treatment effeciency is high.
Description of the drawings
Fig. 1 is the process flow chart of the preprocess method of aged refuse in MSW landfill percolate of the present invention.
Specific implementation mode
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, still
It should be appreciated that these descriptions are only the feature and advantage further illustrated the present invention, rather than to the claims in the present invention
Limitation.
Embodiment 1
As shown in Figure 1, certain city life garbage landfill, the condition of water quality of early stage landfill leachate：BOD5For 4800mg/
L, COD 11000mg/L, ammonia nitrogen 260mg/L, pH value 5.8, the concentration of total mercury, total arsenic and total chromium be respectively 43mg/L,
61mg/L and 76mg/L, the condition of water quality of mature landfill leachate：BOD5For 1600mg/L, COD 3100mg/L, ammonia nitrogen is
The concentration of 2400mg/L, pH value 7.8, total mercury, total arsenic and total chromium are respectively 12mg/L, 21mg/L and 29mg/L, pretreatment
Method includes the following steps：
Step a)：The early stage percolate is delivered to the first photocatalysis and inhaled by the early stage percolate for extracting refuse landfill
Attached tower carries out the chelating suction-operated of heavy metal and organic matter, obtains the first processing percolate, and first percolate is imported
Regulating reservoir, after adsorption operations run 8h, stops charging, and early stage percolate is switched to the second photocatalysis adsorption tower, and described first
It is filled with modified adsorbent in photocatalysis adsorption tower and the second photocatalysis adsorption tower；
Step b)：The aged percolate is delivered to ammonia-nitrogen stripping tower by the aged percolate for extracting refuse landfill, to
Feeding lime in the ammonia-nitrogen stripping tower adjusts the pH value of the aged percolate between 10, is set in the ammonia-nitrogen stripping tower
Blast aeration pipe is set, ammonia-nitrogen desorption is carried out by the blast aeration pipe, the gas-water ratio in ammonia-nitrogen stripping tower is 100: 1, operation
After 8h, the aged percolate that obtains that treated, and it is classified as second processing percolate and third processing percolate two parts,
Middle second processing percolate directly imports regulating reservoir；
Step c)：Third processing percolate in step b) is passed through the first photocatalysis adsorption tower in step a)
It is interior, the leaching operation for carrying out heavy metal 4h is contacted with the adsorbent in the first photocatalysis adsorption tower, the third processing is oozed
Adsorbent in filtrate and the first photocatalysis adsorption tower, liquid-solid ratio 5：1, the aged percolate containing heavy metal will be leached and sent
To heavy metal removing tower, heavy metal removing operation is carried out under the DC electric field effect that electric field strength is 0.5V/cm, is further located
Third processing percolate after reason imports regulating reservoir；The percolate for importing regulating reservoir meets the water inlet water of subsequent biological treatment technique
Matter requirement, into subsequent biological treatment and advanced treating；
Step d)：Open the ultraviolet light power supply of step c) the first photocatalysis adsorption towers, irradiation intensity 2500uw/cm2,
Carry out the photocatalytic oxidation of organic matter in adsorbent；
Step e)：After the completion of the second photocatalysis adsorption tower operation in step a), the behaviour of step a)~step d) is repeated
Make, carries out the collaboration pretreatment operation of the early stage percolate and aged percolate of serialization.
Further, the preparation method of modified adsorbent is in the step a)：By the EDTA, four acetate hydrate cobalts and
Tetraethyl titanate stirring and dissolving under conditions of 30 DEG C is dispersed in alcohol solvent, obtains mixed liquor A, the EDTA, four water
The mass ratio for closing cobalt acetate, tetraethyl titanate and ethyl alcohol is 8: 8: 10: 20, continues to stir and the mixing is added in active carbon particle
In liquid A, increase temperature to 80 DEG C, continue stirring to etoh solvent volatilization finish, obtain active carbon particle slurry B, the activity
Charcoal particle and the mass ratio of mixed liquor A are 8: 10, the active carbon particle slurry B are placed in nitrogen atmosphere protection stove, journey
Sequence is warming up to 400 DEG C and carries out calcining 10h, obtains modified adsorbent.
By above-mentioned steps treated landfill leachate, condition of water quality in regulating reservoir：BOD5/ COD is 0.41, ammonia nitrogen
Concentration for 420mg/L, pH value 8.0, total mercury, total arsenic and total chromium is respectively 9mg/L, 15mg/L and 19mg/L.
Embodiment 2
Certain city life garbage landfill, the condition of water quality of early stage landfill leachate：BOD5It is for 6200mg/L, COD
17500mg/L, ammonia nitrogen 440mg/L, pH value 6.1, the concentration of total lead, total arsenic and total cadmium be respectively 52mg/L, 74mg/L and
81mg/L, the condition of water quality of mature landfill leachate：BOD5For 1800mg/L, COD 3600mg/L, ammonia nitrogen 3300mg/L,
PH value is 7.9, and the concentration of total lead, total arsenic and total cadmium is respectively 16mg/L, 27mg/L and 42mg/L, preprocess method, including
Following steps：
Step a)：The early stage percolate is delivered to the first photocatalysis and inhaled by the early stage percolate for extracting refuse landfill
Attached tower carries out the chelating suction-operated of heavy metal and organic matter, obtains the first processing percolate, and first percolate is imported
Regulating reservoir, after adsorption operations run 12h, stops charging, and early stage percolate is switched to the second photocatalysis adsorption tower, and described first
It is filled with modified adsorbent in photocatalysis adsorption tower and the second photocatalysis adsorption tower；
Step b)：The aged percolate is delivered to ammonia-nitrogen stripping tower by the aged percolate for extracting refuse landfill, to
Feeding lime in the ammonia-nitrogen stripping tower adjusts the pH value of the aged percolate between 11, is set in the ammonia-nitrogen stripping tower
Blast aeration pipe is set, ammonia-nitrogen desorption is carried out by the blast aeration pipe, the gas-water ratio in ammonia-nitrogen stripping tower is 70: 1, operation
After 12h, the aged percolate that obtains that treated, and it is classified as second processing percolate and third processing percolate two parts,
Wherein second processing percolate directly imports regulating reservoir；
Step c)：Third processing percolate in step b) is passed through the first photocatalysis adsorption tower in step a)
It is interior, the leaching operation for carrying out heavy metal 6h is contacted with the adsorbent in the first photocatalysis adsorption tower, the third processing is oozed
Adsorbent in filtrate and the first photocatalysis adsorption tower, liquid-solid ratio 4：1, the aged percolate containing heavy metal will be leached and sent
To heavy metal removing tower, heavy metal removing operation is carried out under the DC electric field effect that electric field strength is 1.5V/cm, is further located
Third processing percolate after reason imports regulating reservoir；The percolate for importing regulating reservoir meets the water inlet water of subsequent biological treatment technique
Matter requirement, into subsequent biological treatment and advanced treating；
Step d)：Open the ultraviolet light power supply of step c) the first photocatalysis adsorption towers, irradiation intensity 2700uw/cm2,
Carry out the photocatalytic oxidation of organic matter in adsorbent；
Step e)：After the completion of the second photocatalysis adsorption tower operation in step a), the behaviour of step a)~step d) is repeated
Make, carries out the collaboration pretreatment operation of the early stage percolate and aged percolate of serialization.
Further, the preparation method of modified adsorbent is in the step a)：By the EDTA, four acetate hydrate cobalts and
Tetraethyl titanate stirring and dissolving under conditions of 40 DEG C is dispersed in alcohol solvent, obtains mixed liquor A, the EDTA, four water
The mass ratio for closing cobalt acetate, tetraethyl titanate and ethyl alcohol is 9: 9: 10: 35, continues to stir and the mixing is added in active carbon particle
In liquid A, increase temperature to 70 DEG C, continue stirring to etoh solvent volatilization finish, obtain active carbon particle slurry B, the activity
Charcoal particle and the mass ratio of mixed liquor A are 1: 2, the active carbon particle slurry B are placed in nitrogen atmosphere protection stove, program
It is warming up to 450 DEG C and carries out calcining 7h, obtain modified adsorbent.
By above-mentioned steps treated landfill leachate, condition of water quality in regulating reservoir：BOD5/ COD is 0.4, ammonia nitrogen
Concentration for 510mg/L, pH value 8.1, total lead, total arsenic and total cadmium is respectively 12mg/L, 18mg/L and 21mg/L.
Embodiment 3
Certain city life garbage landfill, the condition of water quality of early stage landfill leachate：BOD5It is for 9300mg/L, COD
The concentration of 21800mg/L, ammonia nitrogen 610mg/L, pH value 6.2, total lead, total mercury and Cr VI are respectively 68mg/L, 82mg/L
And 93mg/L, the condition of water quality of mature landfill leachate：BOD5For 2600mg/L, COD 5100mg/L, ammonia nitrogen 3800mg/
L, pH value 8.1, the concentration of total lead, total mercury and Cr VI are respectively 21mg/L, 25mg/L and 33mg/L, preprocess method,
Include the following steps：
Step a)：The early stage percolate is delivered to the first photocatalysis and inhaled by the early stage percolate for extracting refuse landfill
Attached tower carries out the chelating suction-operated of heavy metal and organic matter, obtains the first processing percolate, and first percolate is imported
Regulating reservoir, after adsorption operations run 16h, stops charging, and early stage percolate is switched to the second photocatalysis adsorption tower, and described first
It is filled with modified adsorbent in photocatalysis adsorption tower and the second photocatalysis adsorption tower；
Step b)：The aged percolate is delivered to ammonia-nitrogen stripping tower by the aged percolate for extracting refuse landfill, to
Feeding lime in the ammonia-nitrogen stripping tower adjusts the pH value of the aged percolate between 11, is set in the ammonia-nitrogen stripping tower
Blast aeration pipe is set, ammonia-nitrogen desorption is carried out by the blast aeration pipe, the gas-water ratio in ammonia-nitrogen stripping tower is 100: 1, operation
After 16h, the aged percolate that obtains that treated, and it is classified as second processing percolate and third processing percolate two parts,
Wherein second processing percolate directly imports regulating reservoir；
Step c)：Third processing percolate in step b) is passed through the first photocatalysis adsorption tower in step a)
It is interior, the leaching operation for carrying out heavy metal 8h is contacted with the adsorbent in the first photocatalysis adsorption tower, the third processing is oozed
Adsorbent in filtrate and the first photocatalysis adsorption tower, liquid-solid ratio 5：1, the aged percolate containing heavy metal will be leached and sent
To heavy metal removing tower, heavy metal removing operation is carried out under the DC electric field effect that electric field strength is 2V/cm, is further processed
Third processing percolate afterwards imports regulating reservoir；The percolate for importing regulating reservoir meets the influent quality of subsequent biological treatment technique
It is required that into subsequent biological treatment and advanced treating；
Step d)：Open the ultraviolet light power supply of step c) the first photocatalysis adsorption towers, irradiation intensity 2800uw/cm2,
Carry out the photocatalytic oxidation of organic matter in adsorbent；
Step e)：After the completion of the second photocatalysis adsorption tower operation in step a), the behaviour of step a)~step d) is repeated
Make, carries out the collaboration pretreatment operation of the early stage percolate and aged percolate of serialization.
Further, the preparation method of modified adsorbent is in the step a)：By the EDTA, four acetate hydrate cobalts and
Tetraethyl titanate stirring and dissolving under conditions of 40 DEG C is dispersed in alcohol solvent, obtains mixed liquor A, the EDTA, four water
The mass ratio for closing cobalt acetate, tetraethyl titanate and ethyl alcohol is 10：10：8：50, continue stirring and active carbon particle is added described mixed
Close in liquid A, increase temperature to 80 DEG C, continue stirring to etoh solvent volatilization and finish, obtain active carbon particle slurry B, the work
Property charcoal particle and mixed liquor A mass ratio be 1：3, the active carbon particle slurry B is placed in nitrogen atmosphere protection stove, journey
Sequence is warming up to 500 DEG C and carries out calcining 5h, obtains modified adsorbent.
By above-mentioned steps treated landfill leachate, condition of water quality in regulating reservoir：BOD5/ COD is 0.39, ammonia nitrogen
Concentration for 810mg/L, pH value 8.3, total lead, total mercury and Cr VI is respectively 19mg/L, 20mg/L and 25mg/L.
The explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (8)
1. a kind of preprocess method of aged refuse in MSW landfill percolate, it is characterised in that：Include the following steps：
Step a)：The early stage percolate for extracting refuse landfill, the first photocatalysis adsorption tower is delivered to by the early stage percolate
The chelating suction-operated for carrying out heavy metal and organic matter, obtains the first processing percolate, and first percolate is imported and is adjusted
Pond, after adsorption operations run 8~16h, stops charging, and early stage percolate is switched to the second photocatalysis adsorption tower, and described first
It is filled with modified adsorbent in photocatalysis adsorption tower and the second photocatalysis adsorption tower；
Step b)：The aged percolate is delivered to ammonia-nitrogen stripping tower by the aged percolate for extracting refuse landfill, to described
Feeding lime in ammonia-nitrogen stripping tower adjusts the pH value of the aged percolate between 10~11, is set in the ammonia-nitrogen stripping tower
Blast aeration pipe is set, ammonia-nitrogen desorption is carried out by the blast aeration pipe, after running 8~16h, the aged diafiltration that obtains that treated
Liquid, and it is classified as second processing percolate and third processing percolate two parts, wherein second processing percolate directly imports
Regulating reservoir；
Step c)：Third processing percolate in step b) is passed through in the first photocatalysis adsorption tower in step a), with
Adsorbent contact in the first photocatalysis adsorption tower carries out the leaching operation of 4~8h of heavy metal, and leaching is contained heavy metal
Aged percolate send to heavy metal removing tower, DC electric field effect under carry out heavy metal removing operation, after being further processed
Third processing percolate import regulating reservoir；
Step d)：The ultraviolet light power supply of step c) the first photocatalysis adsorption towers is opened, the photocatalysis of organic matter in adsorbent is carried out
Oxidation；
Step e)：After the completion of the second photocatalysis adsorption tower operation in step a), the operation of step a)~step d) is repeated, into
The collaboration pretreatment operation of the early stage percolate of row serialization and aged percolate.
2. the preprocess method of aged refuse in MSW landfill percolate according to claim 1, which is characterized in that the step
It is rapid a) in the preparation method of modified adsorbent be：By EDTA, four acetate hydrate cobalts and tetraethyl titanate under conditions of 30~40 DEG C
Stirring and dissolving is dispersed in alcohol solvent, obtains mixed liquor A, continues to stir and the mixed liquor is added in active carbon particle
In A, increase temperature to 60~80 DEG C, continue stirring to etoh solvent volatilization and finish, obtain active carbon particle slurry B, will be described
Active carbon particle slurry B is placed in nitrogen atmosphere protection stove, and temperature programming carries out 5~10h of calcining to 400~500 DEG C, obtains
Modified adsorbent.
3. the preprocess method of aged refuse in MSW landfill percolate according to claim 2, which is characterized in that described
EDTA, four acetate hydrate cobalts, tetraethyl titanate and ethyl alcohol mass ratio be 8~10：8~10：8~10：20~50.
4. the preprocess method of aged refuse in MSW landfill percolate according to claim 2, which is characterized in that the work
Property charcoal particle and mixed liquor A mass ratio be 8~12：10~30.
5. the preprocess method of aged refuse in MSW landfill percolate according to claim 1, which is characterized in that the step
It is rapid b) in gas-water ratio in ammonia-nitrogen stripping tower be 50~100: 1.
6. the preprocess method of aged refuse in MSW landfill percolate according to claim 1, which is characterized in that the step
It is rapid c) in third processing percolate and the first photocatalysis adsorption tower in adsorbent, liquid-solid ratio be 3~5：1.
7. the preprocess method of aged refuse in MSW landfill percolate according to claim 1, which is characterized in that the step
It is rapid c) in DC electric field electric field strength be 0.5~2V/cm.
8. the preprocess method of aged refuse in MSW landfill percolate according to claim 1, which is characterized in that the step
The irradiation intensity of rapid d) ultraviolet light is 2500~2800uw/cm2。
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