CN109179918A - A kind of biochemical processing method for refuse landfill landfill leachate - Google Patents
A kind of biochemical processing method for refuse landfill landfill leachate Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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Abstract
The present invention provides a kind of biochemical processing methods for refuse landfill landfill leachate.The technical solution has carried out brand-new design to its process conditions on the basis of conventional treatment method around the water quality characteristic of landfill leachate.Calcium is added into raw water to be processed first in the technical solution, carry out flocculation sedimentation, stripping then enters ABR processing and SBR processing, it is uniprocessing or multistep treatment depending on water quality situation setting, simultaneously using high compound salt tolerant strain, there is preferable removal effect for substance and ammonia nitrogen difficult to degrade, the reaction of the Strong oxdiatives such as Fenton's reaction or light electrolysis is executed with specified conditions again to processing product, then adjust pH value, and it adds coagulated agent and carries out flocculation sedimentation, adsorption treatment is finally carried out with the active carbon of specific quantity, to complete processing work.Landfill leachate after processed by the invention, COD can be down within 100mg/L, while appearance, smell significantly improve, and meet emission request comprehensively.
Description
Technical field
The present invention relates to technical field of sewage, and in particular to a kind of biochemistry for refuse landfill landfill leachate
Processing method.
Background technique
Landfill leachate refers to the moisture that rubbish itself contains in refuse landfill, the sleet water into landfill yard
And other moisture, the saturation moisture capacity of rubbish, overburden layer is deducted, and undergo waste layer and overburden layer and a kind of high concentration for being formed
Organic wastewater.
The processing of percolated liquid in city refuse landfill is always very intractable in Landfill Site Design, operation and management asks
Topic.Percolate is product of the liquid in landfill yard gravity flowing, is mainly derived from the interior aqueous of precipitation and rubbish itself.Due to liquid
Body may influence the property of percolate, including physical factor, chemical factor and biology in many of flow process factor
Factor etc., so the property of percolate changes in a sizable range.In general, pH value is between 4~9, COD
In the range of 2000~62000mg/L, BOD5 heavy metal in 60~45000mg/L, heavy metal concentration and municipal wastewater
Concentration is almost the same.Percolated liquid in city refuse landfill is a kind of high concentrated organic wastewater of complicated component, if untreated
It is directly discharged into environment, will cause serious environmental pollution.For the purpose of protecting environment, it is essential for carrying out processing to percolate
's.
The processing method of landfill leachate includes physical-chemical process and bioanalysis.Physical-chemical process mainly inhale by active charcoal
Attached, chemical precipitation, Density Separation, chemical oxidation, electronation, ion exchange, film dialysis, air lift and wet oxidation process etc. are a variety of
Method, when COD is 2000~4000mg/L, the COD removal rate of physical chemistry method is up to 50%~87%.With biological treatment phase
Than materializing strategy is not influenced by water quality and quantity variation, and effluent quality is more stable, especially lower to BOD5/COD ratio
(0.07~0.20) is difficult to the landfill leachate of biological treatment, there is preferable treatment effect.But physical chemistry method processing cost is higher,
It is unsuitable for the processing of big yield landfill leachate, therefore landfill leachate mainly uses bioanalysis.
Bioanalysis is divided into the combination of Aerobic biological process, anaerobic bio-treated and the two.Aerobic Process for Treatment includes that activity is dirty
Mud method, aeration oxidation pool, the aerobic stabilization pool, biological rotating disk and trickling filter etc..Anaerobic Treatment includes that upward flow Sludge Bed, anaerobism are solid
Surely change bioreactor, mixing reactor and the anaerobic stabilization pool.In the prior art, cumbersome to the treatment process of landfill leachate multiple
It is miscellaneous, and be difficult to obtain ideal treatment effect, therefore, it is necessary to which the condition of water quality for surrounding landfill leachate is developed one kind and is directed to
The processing method of property, to promote treatment effect.
Summary of the invention
The present invention is directed to be directed to the technological deficiency of the prior art, a kind of life for refuse landfill landfill leachate is provided
Change processing method, the technical problem ineffective to landfill leachate treatment of the correlation technique to solve the prior art.
To realize the above technical purpose, the invention adopts the following technical scheme:
A kind of biochemical processing method for refuse landfill landfill leachate, comprising the following steps:
1) to raw water feeding lime, PH is adjusted to 10 or so, and add PAM and precipitated；；
2) water outlet adds liquid alkaline after precipitating, and PH is adjusted to 11 or so, carries out stripping reaction into stripping pond, removes ammonia nitrogen；
3) sewage after stripping enters single-stage or multistage ABR and SBR combined bio reaction tank, in the biological reaction pool
In add high efficiency composition Facultative Halophiles, remove most pollutants；
4) Strong oxdiative method is used through step 3) water outlet, mainly there is Fenton or light electrolysis, acid adding adjusts its pH to 2~4, is added
Fe2+And H2O2, it is aerated, reaction, then plus alkali adjusts its pH to 9-10, flocculation sedimentation；
5) into step 4) products therefrom through activated carbon adsorption tank, after adsorbing, discharge.
Preferably, the water quality indicator of the raw water meets the following conditions: COD≤10000mg/L；Ammonia nitrogen≤2000mg/
L；Total nitrogen≤2500mg/L；Total phosphorus≤10mg/L；Conductivity≤18ms/cm.
Preferably, before executing ABR+SBR combination biological reaction pool processing, feeding lime precipitating is gone in step 3)
It except noxious materials such as part heavy metals, while adjusting PH and carrying out stripping, clear up inhibition of the high ammonia nitrogen to microorganism.
Preferably, adding high efficiency composition salt tolerant strain in ABR+SBR combination biological reaction pool in step 3)；
Preferably, step 4) uses Strong oxdiative technique, predominantly Fenton technology after bio-chemical effluent；
Preferably, water outlet " household refuse landfill sites contamination control standard " of the step 5) after activated carbon adsorption
(GB16889-2008) 2 emission request of table in.
The present invention provides a kind of biochemical processing methods for refuse landfill landfill leachate.The technical solution surrounds
The water quality characteristic of landfill leachate has carried out brand-new design to its process conditions on the basis of conventional treatment method.The technical side
Lime is added in case into raw water to be processed first, carries out flocculation sedimentation, then adjusts pH value and carries out stripping reaction, successively then
The processing of ABR+SBR combined bio is executed, adds high efficiency composition Facultative Halophiles in the combination biological reaction pool；Again to processing product
Fenton's reaction is executed with specified conditions, then plus alkali carries out flocculation sedimentation, adsorption treatment is finally carried out with the active carbon of specific quantity,
To complete processing work.Strain used in each stage, which has been effectively ensured, in the present invention can obtain good survival, and seep to rubbish
Ammonia and nitrogen components also have good treatment effect in filtrate.Landfill leachate after processed by the invention meets " life rubbish comprehensively
Rubbish landfill yard contamination control standard " 2 emission request of table in (GB16889-2008).
Detailed description of the invention
Fig. 1 is flow chart of the method for the present invention.
Specific embodiment
Below by specific embodiments of the present invention will be described in detail.In order to avoid excessive unnecessary details,
It will not be described in detail in following embodiment to belonging to well known structure or function.Approximation used in following embodiment
Language can be used for quantitative expression, show to allow quantity to have certain variation in the case where not changing basic function.It is fixed except having
Adopted outer, technical and scientific term used in following embodiment has the phase being commonly understood by with those skilled in the art of the invention
Same meaning.
Embodiment 1
1, landfill yard overview
Dacheng County Design of Waste Landfill Site day handles 195 tons of house refuse, 1,420,000 m of aggregate storage capacity3, service life 16.8.
Build two waste buryings, percolate guide system, sump, conditioning tank, sewage treatment facility, integrated management room etc..
2, percolate
It is as shown in table 1 that landfill percolate conditioning tank surveys water quality indicator:
The water quality indicator of the waste water to be processed of table 1
| COD(mg/L) | Ammonia nitrogen (mg/L) | Total nitrogen (mg/L) | Total phosphorus (mg/L) | pH | Conductivity (ms/cm) |
| ≤3500 | ≤1500 | ≤1800 | ≤10 | 9 | ≤18 |
3, auxiliary process design
The technique that pilot experiment uses are as follows: coagulating sedimentation → stripping → ABR1 → SBR1 → ABR2 → SBR2 → active carbon is inhaled
Attached → draining.
4, experimental result
4.1 pilot-scale experiment
Pilot experiment was stablized by trial operation in the entrance of end strain domestication on June 10 by the end of July 13 with each workshop section
Mean value is taken subject to valid data, obtains pilot scale effect, as shown in table 2:
2 pilot plant test result of table
By upper Biao Ke get: pilot scale is integrally 97.3% to the removal rate of COD, ammonia nitrogen removal frank 98.8%.COD, ammonia nitrogen
Maximum removal is obtained in the water outlet ABR+SBR, the especially strain is ideal to the removal of ammonia nitrogen.In water outlet
Hard-degraded substance is more, separately carries out the experiment such as light electrolysis, Fenton to water outlet then.
About the On Index of nitrate nitrogen, nitrite nitrogen after the organic nitrogen index and biochemistry of landfill leachate raw water, divide
It takes 4 water samples to send to other places and does total nitrogen and ammonia nitrogen chemical examination, data are as shown in table 3:
Each stage ammonia and nitrogen components content of table 3
| Raw water | Stripping | SBR1 | SBR2 | |
| Ammonia nitrogen (mg/L) | 957 | 265 | 1.87 | 3.3 |
| Total nitrogen (mg/L) | 1168 | 363 | 23.3 | 20.4 |
Though ammonia nitrogen data measured by upper table disagree with our institute's measured data, total nitrogen is not from the point of view of general trend
It is how much higher than ammonia nitrogen, that is to say, that the nitrate nitrogen of organic nitrogen content and bio-chemical effluent, nitrite nitrogen content be not high in raw water.It says
The bright high efficiency composition salt tolerant strain is not only survived well, also has very high removal rate to ammonia nitrogen, it might even be possible in same container
It realizes denitrification, is removed ammonia nitrogen thoroughly.
4.2 light electrolysis
Light electrolysis experiment flow: waste water acid adding tune pH to 3 adds adjusting PH with base to 9, flocculates into padding aeration after aeration
Precipitating.Specific experiment data are as shown in following table 4~6:
4 SBR1 of table is discharged microelectrolysis processing result
| COD(mg/L) | Ammonia nitrogen (mg/L) | |
| SBR1 water outlet | 1262 | 42 |
| It is electrolysed 0.5h | 487 | 31 |
| It is electrolysed 1h | 478 | 29 |
5 SBR2 of table is discharged microelectrolysis processing result
| COD(mg/L) | Ammonia nitrogen (mg/L) | |
| Water outlet | 1051 | 29 |
| It is electrolysed 0.5h | 396 | 24 |
| It is electrolysed 1.0h | 396 | 23.7 |
6 SBR2 of table is discharged microelectrolysis processing result
| COD(mg/L) | Ammonia nitrogen (mg/L) | |
| SBR2 water outlet | 360 | 27 |
| It is electrolysed 0.5h | 144 | 22.9 |
| It is electrolysed 1h | 139 | 21.6 |
| It is electrolysed 1.5h | 133 | 20.9 |
The sequence tested is done to be SBR1 water outlet, SBR2 water outlet, take turns doing the water sample in different reaction time to obtain most preferably
Reaction time, it is demonstrated experimentally that light electrolysis optimum reacting time is 0.5h.
Statistics indicate that light electrolysis has removal to COD, but few to ammonia nitrogen removal, it is because of discovery iron carbon that 4d is only in experiment
It is too short that filler handles the waste water hardened period, just will be greatly reduced using efficiency of post treatment several times, operating in this way
Property is unsatisfactory.
The processing of 4.3 Fenton process
4.3.1 Fenton lab scale
Since light electrolysis has the shortcomings that filler is hardened fast, then having the Fenton's reaction of similar mechanism then without plate to light electrolysis
Knot one is said, in addition to mud amount is more.
Fenton's reaction condition: Fe is added in waste water acid adding tune pH to 2~42+, H is added2O2, aeration, later plus adjusting PH with base extremely
9, flocculation sedimentation.
The Fenton treatment effect of the different water outlets of table 7
Have above-mentioned three groups of data that can obtain: the best inlet flow-patterm of Fenton's reaction is 4, and the reaction time is 0.5~1h, seven hydrated sulfuric acids
The ferrous dosage with hydrogen peroxide is 1:1.
No matter the water outlet of which workshop section, for Fenton's reaction to the removal rate of its COD 55% or so, removal rate is poor with light electrolysis
Seldom, but ammonia nitrogen does not also have the phenomenon that rise as micro-electrolysis reaction.
Embodiment 2
A kind of biochemical processing method for refuse landfill landfill leachate, comprising the following steps:
1) to raw water feeding lime, PH is adjusted to 10 or so, and add PAM and precipitated；；
2) water outlet adds liquid alkaline after precipitating, and PH is adjusted to 11 or so, carries out stripping reaction into stripping pond, removes ammonia nitrogen；
3) sewage after stripping enters single-stage or multistage ABR and SBR combined bio reaction tank, in the biological reaction pool
In add high efficiency composition Facultative Halophiles, remove most pollutants；
4) Strong oxdiative method is used through step 3) water outlet, mainly there is Fenton or light electrolysis, acid adding adjusts its pH to 2~4, is added
Fe2+And H2O2, it is aerated, reaction, then plus alkali adjusts its pH to 9-10, flocculation sedimentation；
5) into step 4) products therefrom through activated carbon adsorption tank, after adsorbing, discharge.
Embodiment 3
A kind of biochemical processing method for refuse landfill landfill leachate, comprising the following steps:
1) to raw water feeding lime, PH is adjusted to 10 or so, and add PAM and precipitated；；
2) water outlet adds liquid alkaline after precipitating, and PH is adjusted to 11 or so, carries out stripping reaction into stripping pond, removes ammonia nitrogen；
3) sewage after stripping enters single-stage or multistage ABR and SBR combined bio reaction tank, in the biological reaction pool
In add high efficiency composition Facultative Halophiles, remove most pollutants；
4) Strong oxdiative method is used through step 3) water outlet, mainly there is Fenton or light electrolysis, acid adding adjusts its pH to 2~4, is added
Fe2+And H2O2, it is aerated, reaction, then plus alkali adjusts its pH to 9-10, flocculation sedimentation；
5) into step 4) products therefrom through activated carbon adsorption tank, after adsorbing, discharge.
Wherein, the water quality indicator of the raw water meets the following conditions: COD≤10000mg/L；Ammonia nitrogen≤2000mg/L；Always
Nitrogen≤2500mg/L；Total phosphorus≤10mg/L；Conductivity≤18ms/cm.In step 3), biological respinse is combined executing ABR+SBR
Before the processing of pond, the noxious materials such as feeding lime precipitating removal part heavy metal, while adjusting PH and carrying out stripping, clear up high ammonia nitrogen
Inhibition to microorganism.In step 3), high efficiency composition salt tolerant strain is added in ABR+SBR combination biological reaction pool；Step 4)
Strong oxdiative technique, predominantly Fenton technology are used after bio-chemical effluent；Water outlet " house refuse of the step 5) after activated carbon adsorption
Landfill yard contamination control standard " 2 emission request of table in (GB16889-2008).
The embodiments of the present invention have been described in detail above, but content is only the preferred embodiment of the present invention,
It is not intended to limit the invention.All any modifications, equivalent replacements, and improvements etc. done in application range of the invention, should all
It is included within protection scope of the present invention.
Claims (4)
1. a kind of biochemical processing method for refuse landfill landfill leachate, it is characterised in that the following steps are included:
1) to raw water feeding lime, PH is adjusted to 10, and add PAM and precipitated；
2) water outlet adds liquid alkaline after precipitating, and PH is adjusted to 11, carries out stripping reaction into stripping pond, removes ammonia nitrogen；
3) sewage after stripping enters single-stage ABR, SBR combined bio reaction tank or enters the life of multistage ABR, SBR combined type
Object reaction tank, adds Facultative Halophiles in biological reaction pool；
4) it is discharged through step 3), acid adding adjusts its pH to 2~4, and Fe is added2+And H2O2, it is aerated, reaction, then plus alkali adjusts its pH
To 9-10, flocculation sedimentation；
5) step 4) products therefrom is taken, in activated carbon adsorption tank after adsorbing, discharge.
2. a kind of biochemical processing method for refuse landfill landfill leachate according to claim 1, feature exist
Meet the following conditions in the water quality indicator of the raw water: COD≤10000mg/L；Ammonia nitrogen≤2000mg/L；Total nitrogen≤2500mg/
L；Total phosphorus≤10mg/L；Conductivity≤18ms/cm.
3. a kind of biochemical processing method for refuse landfill landfill leachate according to claim 1, feature exist
In step 3), while entering ABR, SBR combined bio reaction tank, Facultative Halophiles are added into biological reaction pool.
4. a kind of biochemical processing method for refuse landfill landfill leachate according to claim 2, feature exist
In step 5), treated that water body reaches in chinese national standard GB16889-2008,2 emission request of table.
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| CN110182988A (en) * | 2019-04-22 | 2019-08-30 | 上海老港废弃物处置有限公司 | A kind of method of Fenton and activated carbon combined processing treatment of advanced stage landfill leachate |
| CN110316907A (en) * | 2019-06-26 | 2019-10-11 | 安徽安江环保科技有限公司 | A kind of percolation liquid treating system and technique based on refuse landfill |
| CN110540337A (en) * | 2019-06-20 | 2019-12-06 | 安徽中泰创展环境科技股份有限公司 | novel efficient treatment method for landfill leachate |
| CN110668642A (en) * | 2019-10-16 | 2020-01-10 | 南京万德斯环保科技股份有限公司 | Electrochemical coupling advanced oxidation process and device suitable for deep treatment of waste leachate |
| CN112299655A (en) * | 2020-10-14 | 2021-02-02 | 福建工程学院 | Novel treatment process for aged landfill leachate |
| GB2591282A (en) * | 2020-01-24 | 2021-07-28 | Hydrolize Ltd | Water remediation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110182988A (en) * | 2019-04-22 | 2019-08-30 | 上海老港废弃物处置有限公司 | A kind of method of Fenton and activated carbon combined processing treatment of advanced stage landfill leachate |
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| CN110316907A (en) * | 2019-06-26 | 2019-10-11 | 安徽安江环保科技有限公司 | A kind of percolation liquid treating system and technique based on refuse landfill |
| CN110668642A (en) * | 2019-10-16 | 2020-01-10 | 南京万德斯环保科技股份有限公司 | Electrochemical coupling advanced oxidation process and device suitable for deep treatment of waste leachate |
| GB2591282A (en) * | 2020-01-24 | 2021-07-28 | Hydrolize Ltd | Water remediation system |
| GB2591282B (en) * | 2020-01-24 | 2024-05-29 | Hydrolize Ltd | Water remediation system |
| CN112299655A (en) * | 2020-10-14 | 2021-02-02 | 福建工程学院 | Novel treatment process for aged landfill leachate |
| CN112299655B (en) * | 2020-10-14 | 2022-09-06 | 福建工程学院 | Novel treatment process for aged landfill leachate |
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