CN109748465A - Landfill leachate biological treatment - Google Patents
Landfill leachate biological treatment Download PDFInfo
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- CN109748465A CN109748465A CN201910173327.1A CN201910173327A CN109748465A CN 109748465 A CN109748465 A CN 109748465A CN 201910173327 A CN201910173327 A CN 201910173327A CN 109748465 A CN109748465 A CN 109748465A
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- landfill leachate
- leachate
- percolate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Treatment Of Sludge (AREA)
Abstract
The present invention relates to the technical fields of landfill leachate treatment, more particularly to a kind of refuse leachate biological treatment, landfill leachate biological treatment the following steps are included: (1) landfill leachate collection；(2) pretreatment system；(3) customized treatment equipment；(4) fermentation process of below standard landfill leachate；(5) filter press carries out filters pressing processing to sludge.Refuse leachate biological treatment of the invention provides the approach of an effective processing landfill leachate, reduces the pollution to environment；A large amount of organic matters in landfill leachate are converted into the substance that can be absorbed by plants using microbial action, as liquid fertilizer, increases the nutritional ingredient in soil, reduces the use of pesticide and chemical fertilizer, reduce soil and water pollution.
Description
Technical field
The present invention relates to the technical fields of landfill leachate treatment, more particularly to a kind of refuse leachate biological treatment work
Skill.
Background technique
With the quickening of urbanization and process of industrialization, living garbage pollution is on the rise, and landfill leachate treatment is more next
It is more, how effectively to handle landfill leachate, it has also become urban development, an important factor for Sustainable Socioeconomic Development.
Rubbish is the product of Modern Urban Living and social production, and percolate is the by-product of garbage sanitary filling.Rubbish
It is percolated the sewage come out since fermentation, rainwater leaching brush and surface water, underground water impregnate during stacking and landfill and is referred to as
Landfill leachate.Its water quality is extremely complex, and pollutant concentration is high.The high, metal with COD and biochemical oxygen demand (BOD) concentration
Content fluctuation is big, and strong toxicity, water quality and quantity variation are greatly, the content of ammonia nitrogen is higher, soluble solid content is high, microbial nutrition member
The features such as element is out of proportion, and biodegradability is poor, if not being pocessed direct emission, will lead to ecological degeneration, causes serious ring
Border pollution problem.China's publication in 2008 implements " household refuse landfill sites contamination control the standard " (GB16889- newly revised
2008) tightened up discharge, is proposed to the indexs such as COD, biochemical oxygen demand (BOD), ammonia nitrogen, heavy metal in landfill leachate
Standard.Original percolate treating process is extremely difficult to the requirement of discharge standard, only by being further processed or upgrading is former
There is technique to be just able to satisfy the emission request of new standard.
Currently, the processing technique of landfill leachate includes biological treatment, physical treatment, chemical treatment and land treatment systems.
Biological treatment is exactly microorganism mass propagation under given conditions, by metabolism degradation sewage
Organic matter achievees the purpose that sewage purification.Since landfill leachate is a kind of waste water based on organic pollutant, it is raw
Object processing is one of main processing ways of landfill leachate.According to the microorganism to play a major role in biological wastewater treatment process
Type of respiration, biological treatment can be divided into Aerobic Process for Treatment, Anaerobic Treatment and amphimicrobian processing.Biological treatment is vulnerable to leachate quality
The influence of water variation, processing cost is higher, and degradation speed is slow, long processing period.And anaerobe is quicker to noxious material
Sense, anaerobic reactor initial start-up are slow.
Physical treatment can remove suspended solid, coloration, ammonia nitrogen and refractory organic in landfill leachate, protect
Demonstrate,prove the normal operation of subsequent biological treatment technique.The physical method of landfill leachate treatment has: coagulation, activated carbon adsorption, stripping,
UF membrane and ion exchange etc..The processing capacity of physical treatment method is small, and film used in membrane technology method is easy to pollute, needs pair
Landfill leachate is pre-processed, while also needing to consume comparable energy.And ammonia aeration method requires very the pH value of percolate
Height need to use strong acid gas recovery, increase processing cost.
Chemical method mainly has chemical precipitation method and chemical oxidization method.Chemical precipitation method is Xiang Shuizhong feeding lime or guanite
Precipitating reagents such as (magnesium ammonium phosphates) are allowed to that precipitation reaction occurs with Pollutants in Wastewater, form insoluble solid, gone by being separated by solid-liquid separation
Except the method for water pollutant, chemical precipitation is mainly used for removing hardly degraded organic substance, heavy metal, suspension in landfill leachate
Solid, coloration and ammonia nitrogen etc., chemical precipitation method need to use a large amount of precipitating reagents, and to pH sensitive, the sludge of generation need to be further processed；
Chemical oxidization method is to be converted the toxic pollutant in landfill leachate by the redox reaction between medicament and pollutant
For the process of nontoxic or micro- noxious material, chemical oxidization method is widely used in the advanced treating of landfill leachate, currently used oxidation
Agent is mainly hydrogen peroxide and ozone, but chemical oxidization method processing landfill leachate is at high cost, and energy consumption is high.
The land treatment systems of landfill leachate mainly pass through the work such as filtering, ion exchange, absorption and precipitating of soil particle
With the suspended solid particles object and colloidal sol ingredient in the landfill leachate of place to go, landfill leachate is made by the microbial action of soil
In organic matter and ammonia convert, by evaporation reduce landfill leachate occurrence quantity, pass through terrestrial ecosystems
A kind of sewage water treatment method that self regulating and control mechanism removes pollutants from landfill leachate.At the soil of landfill leachate
Reason includes recharge processing and artificial swamp.Since condition limits, artificial swamp mainly or with recharge processing is using seldom
It is main.The limitation of land treatment systems climate condition, is generally only applied to arid area.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of refuse leachate biological treatment, providing one has
The approach of the processing landfill leachate of effect, reduces the pollution to environment；It will be a large amount of in landfill leachate using microbial action
Organic matter is converted into the substance that can be absorbed by plants, and as liquid fertilizer, increases the nutritional ingredient in soil, reduces agriculture
The use of medicine and chemical fertilizer reduces soil and water pollution.
Refuse leachate biological treatment of the invention, comprising the following steps:
(1) collection of landfill leachate: it is mainly used for the collection of landfill leachate, landfill leachate is concentrated in collecting pit.
(2) pretreatment system: landfill leachate enters pretreatment system from collecting pit, and pretreatment system pre-processes entrance
Landfill leachate in system carries out pre-treatment, solid particulate matter, colloidal particle, oils object in effective catching rubbish percolate
Matter and algae impurity.
(3) customized treatment equipment: entering customized treatment equipment by the processed landfill leachate of pretreatment system, customization
Processing equipment combines activation, absorption and disinfection composite technology to carry out advanced treating to pretreated percolate, and infiltration is effectively reduced
The concentration of COD, biochemical oxygen demand (BOD), ammonia nitrogen and heavy metal in filtrate seeps rubbish after the processing for meeting national standard
Filtrate is discharged.
(4) fermentation process of below standard landfill leachate: after the processing of customized treatment equipment, percolate not up to standard enters receipts
Collect in tank, and carry out centralized collection in collecting tank, add ferment bacterium, ferment bacterium is carried out at fermentation using percolate not up to standard
Reason.
(5) filter press carries out filters pressing processing to sludge: the sludge generated after the processing of customized treatment equipment enters sludge press filtration
Machine carries out filters pressing, and sludge carries out landfill disposal after being compressed into mud cake.
Refuse leachate biological treatment of the invention, water quality and quantity and dirt in the step (2) according to percolate
It contaminates object content and selects pretreating process, when leachate quality is poor, pollutant load is more, the appropriate step for increasing pretreating process
Suddenly, solid particulate matter, colloidal particle, oily substance and the algae impurity in percolate are sufficiently reduced.
Refuse leachate biological treatment of the invention, pretreatment system includes that graphene is located in advance in the step (2)
Manage device and other physicochemical techniques.
Refuse leachate biological treatment of the invention, according to the water quality characteristics of landfill leachate in the step (4)
Adjusting the additive amount of ferment bacterium reduces the additive amount of ferment bacterium, garbage filter when the content of organic matter in landfill leachate is lower
When the content of organic matter is higher in liquid, the appropriate additive amount for increasing ferment bacterium.
Refuse leachate biological treatment of the invention, in the step (4), percolate not up to standard and ferment bacterium
Anaerobic fermentation draws filling mode using mechanical.
Refuse leachate biological treatment of the invention, in the step (5), the percolate generated in pressure-filtering process is again
Secondary enter in collecting pit is handled again.
Compared with prior art the invention has the benefit that being carried out by wastes pre-processing system to rubbish percolate preliminary
Then processing carries out advanced treating to landfill leachate by customized treatment equipment, the chemical oxygen demand in percolate is effectively reduced
Amount, biochemical oxygen demand (BOD), ammonia nitrogen and heavy metal concentration, percolate up to standard is discharged, and has scientifically and rationally administered rubbish dirt
It contaminates, improve the living environment that people depend on for existence；The fermentation process of percolate not up to standard in collecting tank Jing Guo ferment bacterium,
It is the substance that can be absorbed and used by plants by the organic matter degradation in landfill leachate, liquid fertilizer is made and applies in agricultural life
In production, increase the nutritional ingredient in soil, effectively improves soil, increase soil fertility, make agricultural zootechnical increasing both production and income, promote agricultural
Sustainable development reduces the use of fertilizer and pesticide, reduces pollution by chemical fertilizer and the pollution by pesticides of soil and water body, efficiently uses rubbish
Percolate is turned waste into wealth, and is changed evil as benefit and volume reduction decrement, is reduced its pollution to environment, while reducing the cost of garbage disposal,
The technique occupied area is small, few without accumulation, periphery green percentage height, civil engineering demand, the construction period is shortened, to reduce people
Work cost and investment in land, further decrease overall cost of ownership.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
With reference to embodiment, the embodiment of the present invention is furthur described in detail.Following embodiment is used for
Illustrate the present invention, but is not intended to limit the scope of the invention.
Life and industry in landfill leachate after pipeline is collected enter collecting pit, detect landfill leachate water quality,
Water and pollutant load select pretreating process according to water quality, water and pollutant load, and when water quality is poor, water is larger,
When pollutants from landfill leachate content is higher, at the appropriate graphene processing unit or other materializations increased in pretreatment system
Device quantity is managed, the landfill leachate in collecting pit enters pretreatment system, graphene processing unit or other materializing strategies dress
It sets and intercepts solid particulate matter, colloidal particle, oily substance and the algae impurity in landfill leachate in pretreatment unit side,
Enter customized treatment equipment into the landfill leachate for crossing pretreatment system, customized treatment equipment passes through activation, absorption and disinfection
Composite technology carries out advanced treating to pretreated percolate, and COD in percolate, biochemical aerobic is effectively reduced
Amount, the concentration of ammonia nitrogen and heavy metal, landfill leachate after the processing for meeting national standard is discharged, wherein that treated is dirty
Mud enters filter press and carries out filters pressing, and sludge carries out landfill disposal after being compressed into mud cake, passes through without landfill leachate up to standard
Machinery is drawn filling mode and is entered in collecting tank, centralized collection is carried out in collecting tank, according to garbage filter in collecting tank
Water quality, water and the content of organic matter of liquid, a certain proportion of ferment bacterium is added into collecting tank, when landfill leachate water quality compared with
Well, when water is less, the content of organic matter is less, the appropriate additive amount for reducing ferment bacterium, when the water quality of landfill leachate is poor, water
When measuring that more, the content of organic matter is higher, increase the additive amount of ferment bacterium, enables ferment bacterium using in percolate not up to standard
Organic matter carries out fermentation process, the organic matter in fully degraded landfill leachate, and a large amount of organic matters in landfill leachate are through ferment
After plain bacterium degradation, the substance that can be absorbed by plants is generated, liquid fertilizer is can be used as agricultural production, soil can be increased
Nutritional ingredient in earth, and then the use of chemical fertilizer and pesticide is reduced, to reduce the chemical fertilizer and pollution by pesticides in soil and water body.
Wastes pre-processing system carries out preliminary treatment to rubbish percolate, when the water quality of landfill leachate is poor, organic matter contains
When measuring higher, the appropriate quantity for increasing pretreating graphite alkene pretreatment unit or other apparatus for physical Chemical treating is by pretreatment
System treated landfill leachate enters customized treatment equipment, customized treatment equipment carry out advanced treating to landfill leachate, have
Effect reduces COD, biochemical oxygen demand (BOD), ammonia nitrogen and the heavy metal concentration in percolate, and percolate up to standard is arranged
It puts, has scientifically and rationally administered refuse pollution, improved the living environment that people depend on for existence；Percolate not up to standard is being collected
Fermentation process in tank Jing Guo ferment bacterium, is the substance that can be absorbed and used by plants by the organic matter degradation in landfill leachate,
Liquid fertilizer application is made in agricultural production, increases the nutritional ingredient in soil, effectively improvement soil, increase soil fertility, makes
Agricultural zootechnical increasing both production and income promotes agricultural sustainable development, reduces the use of fertilizer and pesticide, to reduce soil and water body
Pollution by chemical fertilizer and pollution by pesticides, the technique efficiently use landfill leachate, turn waste into wealth, and change evil as benefit and volume reduction decrement, reduce
Pollution of the landfill leachate to environment, while the cost of garbage disposal is reduced, the technique occupied area is small, green without accumulation, periphery
Rate is high, civil engineering demand is few, shortens the construction period, to reduce cost of labor and investment in land, further decreases total
Cost of investment.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvements and modifications, these improvements and modifications can also be made
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of refuse leachate biological treatment, which comprises the following steps:
(1) collection of landfill leachate: it is mainly used for the collection of landfill leachate, landfill leachate is concentrated in collecting pit；
(2) pretreatment system: landfill leachate enters pretreatment system from collecting pit, and pretreatment system is to entering pretreatment system
In landfill leachate carry out pre-treatment, the solid particulate matter, colloidal particle, oily substance in effective catching rubbish percolate with
Algae impurity；
(3) customized treatment equipment: enter customized treatment equipment, customized treatment by the processed landfill leachate of pretreatment system
Equipment combines activation, absorption and disinfection composite technology to carry out advanced treating to pretreated percolate, and percolate is effectively reduced
In COD, biochemical oxygen demand (BOD), the concentration of ammonia nitrogen and heavy metal, by landfill leachate after the processing for meeting national standard
It is discharged；
(4) fermentation process of below standard landfill leachate: after the processing of customized treatment equipment, percolate not up to standard enters collecting tank
It is interior, and centralized collection is carried out in collecting tank, ferment bacterium is added, ferment bacterium carries out fermentation process using percolate not up to standard；
(5) filter press carries out filters pressing processing to sludge: after the processing of customized treatment equipment the sludge that generates enter sludge filter press into
Row filters pressing, sludge carry out landfill disposal after being compressed into mud cake.
2. refuse leachate biological treatment as described in claim 1, which is characterized in that according to infiltration in the step (2)
The water quality and quantity and pollutant load of filtrate select pretreating process, when leachate quality is poor, pollutant load is more, suitably
The step of increasing pretreating process, the solid particulate matter, colloidal particle, oily substance and algae sufficiently in reduction percolate are miscellaneous
Matter.
3. refuse leachate biological treatment as claimed in claim 2, which is characterized in that pretreatment in the step (2)
System includes graphene pretreatment unit and other physicochemical techniques.
4. refuse leachate biological treatment as claimed in claim 3, which is characterized in that according to rubbish in the step (4)
The water quality characteristics of rubbish percolate adjust the additive amount of ferment bacterium, when the content of organic matter in landfill leachate is lower, reduce ferment
The additive amount of bacterium, when the content of organic matter is higher in landfill leachate, the appropriate additive amount for increasing ferment bacterium.
5. refuse leachate biological treatment as claimed in claim 4, which is characterized in that not up to standard in the step (4)
Percolate and ferment bacterium anaerobic fermentation, draw filling mode using mechanical.
6. refuse leachate biological treatment as claimed in claim 5, which is characterized in that in the step (5), filters pressing
The percolate generated in journey is re-introduced into collecting pit to be handled again.
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| CN201910173327.1A CN109748465A (en) | 2019-03-07 | 2019-03-07 | Landfill leachate biological treatment |
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| CN201910173327.1A CN109748465A (en) | 2019-03-07 | 2019-03-07 | Landfill leachate biological treatment |
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| CN109748465A true CN109748465A (en) | 2019-05-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526521A (en) * | 2019-09-25 | 2019-12-03 | 东莞市粤绿环保有限公司 | A kind of landfill leachate graphene integrated purification system and technique |
| CN111108835A (en) * | 2019-11-27 | 2020-05-08 | 同济大学 | Method for improving low organic soil |
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| US20090230057A1 (en) * | 2008-03-13 | 2009-09-17 | Premier Tech Technologies Ltee | Tertiary system and process for treating a liquid effluent from an onsite domestic secondary treatment unit |
| CN105060607A (en) * | 2015-07-10 | 2015-11-18 | 湖南省交通科学研究院 | Landfill leachate treatment method |
| CN108773911A (en) * | 2018-07-03 | 2018-11-09 | 南京云实环境科技有限公司 | It is a kind of for the inorganic agent of refuse leachate, preparation method and its treatment process |
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2019
- 2019-03-07 CN CN201910173327.1A patent/CN109748465A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090230057A1 (en) * | 2008-03-13 | 2009-09-17 | Premier Tech Technologies Ltee | Tertiary system and process for treating a liquid effluent from an onsite domestic secondary treatment unit |
| CN105060607A (en) * | 2015-07-10 | 2015-11-18 | 湖南省交通科学研究院 | Landfill leachate treatment method |
| CN108773911A (en) * | 2018-07-03 | 2018-11-09 | 南京云实环境科技有限公司 | It is a kind of for the inorganic agent of refuse leachate, preparation method and its treatment process |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110526521A (en) * | 2019-09-25 | 2019-12-03 | 东莞市粤绿环保有限公司 | A kind of landfill leachate graphene integrated purification system and technique |
| CN111108835A (en) * | 2019-11-27 | 2020-05-08 | 同济大学 | Method for improving low organic soil |
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