CN108191144A - A kind of processing method of municipal solid waste incinerator percolate - Google Patents
A kind of processing method of municipal solid waste incinerator percolate Download PDFInfo
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
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Abstract
The present invention proposes a kind of processing method of municipal solid waste incinerator percolate, and the present invention is for processing high concentration COD cr, high concentration NH3N and garbage burning factory percolate high in salt are with obvious effects, can significantly improve effluent quality；Use upflow anaerobic sludge blanket reactor can be with 80% 90%COD in the removal sewage of high-efficiency low energy consumption, system entirety producing water ratio can be improved using ultrafiltration+network pipe type reverse osmosis process, especially network pipe type reverse osmosis process is reverse osmosis compared to common rolling, salt resistance ability is stronger, operating pressure higher, concentration liquid measure is reduced to the receptive level of incineration plant by producing water ratio higher；The excess sludge generated in system is dehydrated by centrifugal dehydrator moisture percentage in sewage sludge being down to 80% hereinafter, then, without being transported using sludge vehicle, avoiding the excessive pollution environment of foul smell in sludge transportational process to trash repository using high pressure screw pump and pipeline.
Description
Technical field
Processing method more particularly to a kind of processing side of municipal solid waste incinerator percolate the present invention relates to percolate
Method.
Background technology
Landfill leachate is the product of crude waste stockpiling, and incineration leachate mostlys come from rubbish water holding itself, rubbish
Rubbish decomposes the liquid generated.Since Chinese rubbish does not carry out categorised collection and processing, while influenced very by region and season
Greatly so that garbage burning factory leachate quality complicated component, water quality and water fluctuation are big.Pollutant concentration is high.According to current system
The incineration leachate water quality data situation of meter, COD concentration in 30000~60000mg/L, BOD concentration 20000~
40000mg/L, ammonia nitrogen concentration is in 1500-2500mg/L, in addition to this, also a large amount of other metals, inorganic pollution.It is heavier
A bit wanted, environment friendly system of the incineration plant as an entirety, does not allow any wastewater disposition at present, and all sewage must be internal
Systemic contamination object zero-emission is realized in consumption.
At present, it is generally percolated using " pretreatment+biochemical treatment+film advanced treating " process garbage burning factory in the industry
Liquid.Wherein, film advanced treating generally uses the treatment process of " nanofiltration (NF)+reverse osmosis (RO) ", to ensure water outlet COD and total nitrogen
It disclosure satisfy that standard.
Since incineration leachate is using nanofiltration film unit mainly reduction COD, the design of reverse osmosis membrane unit is to reduce
COD can reduce the monovalent ions such as ammonia nitrogen and total nitrogen simultaneously, using this technique must series operation just can guarantee effluent quality, nanofiltration
Producing water ratio 85%, reverse osmosis produced water rate be 70%, final system 0.85 × 0.7=0.595 of entirety producing water ratio (59.5%), it is this
The concentrate that operation certainly will cause system to generate is up to 40%, and general incineration plant system can be received and internal consumption
Sewage quantity be only percolate treatment scale 15%~20% in addition it is less.
Invention content
In view of this, the present invention proposes the municipal solid waste incinerator percolate that a kind of producing water ratio is high, concentration liquid measure is few
Processing method.
The technical proposal of the invention is realized in this way：The present invention provides a kind of places of municipal solid waste incinerator percolate
Reason method, includes the following steps,
Landfill leachate is imported solid-liquid separating machine after garbage pool collection, removes solid impurity therein by S1；
S2, the landfill leachate that step S1 is obtained import regulating reservoir, are cached；
S3, to step S2 water outlet from bottom to top pass through upflow anaerobic sludge blanket reactor, degrading high concentration waste water；
S4 carries out MBR enhanced biological nitrogen removal processing to the water outlet of step S3；
S5 carries out network pipe type reverse-osmosis treated to the water outlet of step S4.
On the basis of above technical scheme, it is preferred that in the step S2 inlet COD concentration for 30000~
60000mg/L, regulating reservoir are designed into water retention time 10 days, and pond holds 2000m3, regulating reservoir include two water storages being connected in parallel
Pond, each tank pond hold 1000m3, each tank two blenders of interior setting, wherein a blender setting height is higher than
Another.
On the basis of above technical scheme, it is preferred that water in upflow anaerobic sludge blanket reactor in the step S3
0.5~0.8m/h of upflow velocity is flowed, anaerobism temperature is 33 DEG C~37 DEG C, and pH is 6.5~7.5.
On the basis of above technical scheme, it is preferred that the step S4 includes the following steps,
S4-1 intakes and carries out anti-nitration reaction in anoxic section in denitrification pond；
S4-2 enters in nitrification tank denitrification water outlet, degradable organic pollutant, and by oxidation by nitrobacteria by NH3-N
Nitrite or nitrate is oxidized to, anti-nitration reaction is carried out in obtained nitrite or nitrate steps for importing S4-1；
S4-3 imports sediment fraction sludge in sedimentation basin for the water outlet in step S4-2, and water outlet flows into buffer pool；
S4-4 imports ultrafiltration membrane system for buffer pool water outlet in step S4-3 and handles.
It is further preferred that external ultrafiltration membrane is used in the step S4-4, sludge concentration in step S4-1~S4-3
For 15-30g/L, ultrafiltration membrane system delivery turbidity value is less than 5NTU, and SDI values are less than 5, and ultrafiltration membrane system dope flows back into step
The nitrification tank in denitrification pond and S4-2 in S4-1.
It is further preferred that nitrification tank pH is 7~8 in the step S4-2, nitrification tank temperature is less than 35 DEG C.
On the basis of above technical scheme, it is preferred that add the acid for adjusting pH value to be the water outlet of step S4 in step S5
6.0~6.5, antisludging agent is added in, then with high-pressure pump by water stream S to 30-40bar, the flow after pressurization passes through network pipe type reverse osmosis
Permeable membrane.It is further preferred that again by webmaster after being mixed by the concentrated water of network pipe type reverse osmosis membrane with the flow after pressurization
Formula reverse osmosis membrane.
On the basis of above technical scheme, it is preferred that further include step S6, the sludge generated in step S3 and S4 is led to
It crosses pump and drains into sludge-tank, add a concentration of 1 ‰~3 ‰ PAM, then be transported to centrifugal dehydrator, be dehydrated later liquid phase object pump
Denitrification pond is sent to, solid formation of the solid content higher than 20% utilizes high pressure screw pump and pipeline to trash repository after dehydration.
On the basis of above technical scheme, it is preferred that step S7 is further included, for the foul smell generated in step S1~S5
It is collected by GRP pipe, then imports Biological filter deodorization.
The processing method of the municipal solid waste incinerator percolate of the present invention has the advantages that relative to the prior art：
(1) present invention is for processing high concentration COD cr, high concentration NH3- N and garbage burning factory percolate high in salt
It is with obvious effects, it can significantly improve effluent quality；
(2) use upflow anaerobic sludge blanket reactor can with 80%-90%COD in the removal sewage of high-efficiency low energy consumption,
System entirety producing water ratio can be improved using ultrafiltration+network pipe type reverse osmosis process, especially network pipe type reverse osmosis process is compared to common
Rolling it is reverse osmosis, salt resistance ability is stronger, operating pressure higher, producing water ratio higher, and concentration liquid measure is reduced to incineration plant and can be connect
The level received, producing water ratio can reach treatment scale 85%, concentrate scale is only 15%；
(3) excess sludge generated in system is dehydrated by centrifugal dehydrator moisture percentage in sewage sludge being down to 80% hereinafter, so
It, without being transported using sludge vehicle, is avoided smelly in sludge transportational process to trash repository using high pressure screw pump and pipeline afterwards
The excessive pollution environment of gas.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow chart of the processing method of municipal solid waste incinerator percolate of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
Chu is fully described by, it is clear that described embodiment is only the reality of a part of embodiment of the present invention rather than whole
Apply mode.Based on the embodiment in the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, the processing method of the municipal solid waste incinerator percolate of the present invention, is burnt with handling 200 ton day rubbish
For burning factory's percolate, include the following steps：
S1, landfill leachate strenuous primary treatment.Landfill leachate is imported into solid-liquid separating machine after garbage pool collection, is removed
Solid impurity therein.Large-sized solid particulate matter, silt, hair, fiber substance are retained by solid-liquid separating machine, is avoided
It results in blockage into follow-up membranous system to film.The advantages of seperator is good with interception effect, compact-sized, high degree of automation.
Specifically, solid-liquid separating machine can set reverse spray water with high pressure cleaning system and automatic scraping slag system, by the residue collection of retention extremely
In dreg collecting slot, then by slag-tapping system filter residue is discharged.Traditional solid-liquids such as the alternative existing rotary drum grid of solid-liquid separating machine point
From device, have many advantages, such as that filter residue effect is good, high degree of automation, clean and maintenance are convenient.
S2, regulating reservoir processing.The landfill leachate that step S1 is obtained imports regulating reservoir, is cached.Regulating reservoir is main
That water water is adjusted, the caching of regulating reservoir can ensure into next stage upflow anaerobic sludge blanket reactor into
Water water variation range smaller, regulating reservoir inlet COD concentration are 30000~60000mg/L, are avoided to up-flow anaerobic sludge blanket
Reactor causes impact load.Hypervolia during for the wet season, and percolation liquid treating system treating capacity is limited, needs larger pond
The regulating reservoir of appearance carries out water storage, avoids delaying the waste incineration amount of refuse burning system not in time because of percolate processing.Regulating reservoir
It designs into water retention time 10 days, can at most store 10 days diafiltration output of fluid, pond holds 2000m3.Specifically, regulating reservoir includes
Two tanks being connected in parallel, it is therefore an objective to which, when overhauling one of them, the percolation liquid treating system of another regulating reservoir also can
Operation.Each tank pond holds 1000m3, each tank two blenders of interior setting, wherein a blender setting height is high
In another, regulating reservoir difference water level is adapted to, ensures the low mud that do not sink in regulating reservoir pond.Specifically, a blender height is from storage
Pool bottom 540mm, another blender height are arranged for tank intermediate altitude and along pool wall.
S3, anaerobic UASB processing.To the upflow anaerobic sludge blanket reactor that passes through being discharged from bottom to top of step S2, drop
Solve high-concentration waste water.Specifically, regulating reservoir water outlet is promoted to upflow anaerobic sludge blanket reactor by screw pump, screw pump
Design is in order to facilitate maintenance safety.In upflow anaerobic sludge blanket reactor bottom, there are one the sludge of high concentration, high activity
Layer, most organic matter are converted into CH herein4And CO2.Due to the agitation of gaseous products and bubble adhesion sludge, in dirt
A sludge suspension layer is formed on mud layer.The top of upflow anaerobic sludge blanket reactor be equipped with three phase separator, complete gas,
The separation of liquid, solid three-phase.The gas detached is exported from top, and the sludge detached is then slipped to suspended sludge layer automatically.Go out
Water is then flowed out from settling section.Due to remaining a large amount of anaerobic sludge in upflow anaerobic sludge blanket reactor, sludge concentration is high
Up to 60g/L, the load-bearing capacity for making reactor is very big.It is periodically anti-to up-flow anaerobic sludge blanket according to the sludge concentration detected
Device spoil disposal is answered, the sludge pipe caliber DN150 connected sets Multipoint Uniform spoil disposal, because of sludge concentration height, passes through the side of pumping
Formula carries out spoil disposal.Anaerobism circulating pump is equipped in upflow anaerobic sludge blanket reactor, ensures upflow anaerobic sludge blanket reactor
Sludge bed height, 0.5~0.8m/h of flow upflow velocity.In addition steam heater is installed on anaerobism recycling outlet, by steam
It send to being heated to anaerobic system in the equipment, anaerobism temperature is maintained at 33 DEG C~37 DEG C progress anaeration in normal temperature, saturation used
143.64 DEG C of steam pressure 0.4Mpa, temperature；Online pH instruments are installed, general anaerobic reaction is the sour mistake of production on circulating line
Journey, for ensure anaerobism efficiency, need control upflow anaerobic sludge blanket reactor in pH 6.5~7.5, therefore be designed with alkali throwing
Feeder apparatus, alkali used add pump discharge 100L/H, and operation data shows the unit to the removal rate of COD up to 85%.
The processing of S4, MBR enhanced biological nitrogen removal.MBR enhanced biological nitrogen removal processing is carried out to the water outlet of step S3.Specifically,
The processing of MBR enhanced biological nitrogen removals includes the biochemical treatment of denitrification and nitrification, further comprises ultrafiltration membrane treatment.Specifically, including
Following steps,
S4-1 intakes and carries out anti-nitration reaction in anoxic section in denitrification pond.Specifically, each denitrification pond design two
Platform diving mixer, blender are arranged in different height to ensure to stir evenly in denitrification pond.
S4-2 enters in nitrification tank denitrification water outlet, degradable organic pollutant, and by oxidation by nitrobacteria by NH3-N
Nitrite or nitrate is oxidized to, anti-nitration reaction is carried out in obtained nitrite or nitrate steps for importing S4-1, also
Original removes part COD into nitrogen.Specifically, nitrification tank pH is 7~8, nitrification tank temperature is less than 35 DEG C.Specifically, pass through
Nitrification tank nitrite or nitrate is back to denitrification pond by nitrate reflux pump, and flow back 8-10 times of multiple.
S4-3 imports sediment fraction sludge in sedimentation basin for the water outlet in step S4-2, and water outlet flows into buffer pool.Precipitation
Pond energy sediment fraction sludge, on the one hand remains raw by the sludge reflux of precipitation by sludge reflux pump and pipeline to denitrification pond
Change sludge concentration；On the other hand the sludge into ultrafiltration membrane system is reduced, ultrafiltration membrane dirt is reduced and blocks up frequency, improve ultrafiltration membrane system
Producing water ratio.
S4-4 imports ultrafiltration membrane system for buffer pool water outlet in step S4-3 and handles.Ultrafiltration membrane function is to carry out
Mud-water separation, using external ultrafiltration membrane.By the crown_interception of ultrafiltration membrane the sludge concentration in step S4-1~S4-3 can be made to be
15-30g/L, and extend sludge sludge age, so as to which the strain for making nitrification autotrophic bacterium this generation time longer obtains effectively in pond
Growth, while by constantly domestication formed microorganism species, also have to refractory organic in Leachate site preferably
Degradation function.For ultrafiltration membrane delivery turbidity value less than 5NTU, SDI values are less than 5 simultaneously, can meet subsequent film advanced treatment system into
Water requirement.Specifically, being equipped with return duct in ultrafiltration membrane system, dope is flowed back into denitrification pond and nitrification tank, avoids sludge stream
It loses.
It, will be in step S2 in regulating reservoir specifically, when the COD concentration for entering S4-1 denitrifications ponds is less than 10000mg/L
Water outlet surmounts step S3 and is directly entered denitrification pond, to ensure carbon source needed for anti-nitration reaction.
S5, network pipe type reverse-osmosis treated.Network pipe type reverse-osmosis treated is carried out to the water outlet of step S4.For the super of step S4
Filtering out water adds acid for adjusting pH value to be 6.0~6.5.The inorganic salts fouling such as antisludging agent, anti-silicate, sulfate is added in, antisludging agent adds
For dosage according to scale-forming ion content in waste water, prevailing value is 3~5ppm.Again with high-pressure pump by water stream S to 30-40bar,
The lift H=800m of high-pressure pump, it is therefore an objective to it is anti-so as to improve network pipe type to provide larger pressure for the operation of network pipe type reverse osmosis membrane
Osmosis system water yield, while to overcome fouling membrane and improving the reverse osmosis producing water ratio of network pipe type.Flow after pressurization passes through net
Tubular type reverse osmosis membrane.Specifically, network pipe type is reverse osmosis using circulation pattern in concentration, circulating pump is set by network pipe type reverse osmosis membrane
Concentrated water mixed with the flow after pressurization after again by network pipe type reverse osmosis membrane, so as to ensure network pipe type reverse osmosis membrane surface mistake
Filter flow velocity.For network pipe type reverse osmosis membrane system operating pressure in 30-40bar, producing water ratio is higher, up to 85%, stable effluent quality,
Anti-pollution ability more reverse osmosis than general rolling is strong, producing water ratio is high.
S6, Treatment of Sludge.Sludge-tank is drained by pump to the excess sludge generated in step S2, S3 and S4, because sludge is dense
Degree is high, and special anaerobic sludge concentration is high and viscosity is high, and needing could spoil disposal by way of power.Step S2, in S3 and S4
The sludge solid content of generation is in 2%-4%, a concentration of 1 ‰~3 ‰ PAM of addition, then is transported to centrifugal dehydrator.After dehydration
Liquid phase object be pumped into denitrification pond, after dehydration solid content higher than 20% solid formation then utilize high pressure screw pump and pipeline
To trash repository, without being transported using sludge vehicle, the excessive pollution environment of foul smell in sludge transportational process is avoided.
S7, foul smell collection processing.The foul smell generated in step S1~S5 is collected, then import life by GRP pipe
The deodorization of object filter tank.Biological filter deodorization mode is that foul smell is by moistening, porous and full of active microorganism filtering layer, and utilization is micro-
Absorption, absorption and degradation of the biological cell to odorant, using the cell individual of microorganism is small, surface area is big, strong adsorption,
The characteristics of metabolic type is various resolves into CO after odorant is adsorbed2、H2O、H2SO4、HNO3Etc. simple inorganic matter.Biological filter
Pond deodorization is a kind of safe and reliable processing method, and odor removal efficient is more than 90%, can realize percolate treating stations odorless
Good environment.
Specifically, biogas treatment is further included with recycling step：The biogas yield of upflow anaerobic sludge blanket reactor
Up to 0.4kg/kg.COD, gas production are more.For the biogas that upflow anaerobic sludge blanket reactor generates, at desulfurization dewatering
It is pressurized after reason through biogas wind turbine, it is combustion-supporting to be pipelined to progress in waste incinerator.Biogas energy is made full use of,
When incinerator overhauls, biogas is connected to emergent torch burning after desulfurization dewatering is handled through pipeline.
For handling 200 ton day garbage burning factory percolates.Municipal solid waste incinerator percolate using the present invention
Processing method, the water quality acquired in each step are detected, and obtain result as shown in the table：
The foregoing is merely the better embodiments of the present invention, are not intended to limit the invention, all the present invention's
Within spirit and principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of processing method of municipal solid waste incinerator percolate, it is characterised in that：It includes the following steps,
Landfill leachate is imported solid-liquid separating machine after garbage pool collection, removes solid impurity therein by S1；
S2, the landfill leachate that step S1 is obtained import regulating reservoir, are cached；
S3, to step S2 water outlet from bottom to top pass through upflow anaerobic sludge blanket reactor, degrading high concentration waste water；
S4 carries out MBR enhanced biological nitrogen removal processing to the water outlet of step S3；
S5 carries out network pipe type reverse-osmosis treated to the water outlet of step S4.
2. the processing method of municipal solid waste incinerator percolate as described in claim 1, it is characterised in that：In the step S2
Inlet COD concentration is 30000~60000mg/L, and regulating reservoir is designed into water retention time 10 days, and pond holds 2000m3, regulating reservoir packet
Two tanks being connected in parallel are included, each tank pond holds 1000m3, each tank two blenders of interior setting, wherein one
Platform blender setting height is higher than another.
3. the processing method of municipal solid waste incinerator percolate as described in claim 1, it is characterised in that：In the step S3
0.5~0.8m/h of flow upflow velocity in upflow anaerobic sludge blanket reactor, anaerobism temperature are 33 DEG C~37 DEG C, pH 6.5
~7.5.
4. the processing method of municipal solid waste incinerator percolate as described in claim 1, it is characterised in that：The step S4 packets
Include following steps,
S4-1 intakes and carries out anti-nitration reaction in anoxic section in denitrification pond；
S4-2 enters in nitrification tank denitrification water outlet, degradable organic pollutant, and by oxidation by nitrobacteria by NH3- N is oxidized to
Nitrite or nitrate carries out anti-nitration reaction in obtained nitrite or nitrate steps for importing S4-1；
S4-3 imports sediment fraction sludge in sedimentation basin for the water outlet in step S4-2, and water outlet flows into buffer pool；
S4-4 imports ultrafiltration membrane system for buffer pool water outlet in step S4-3 and handles.
5. the processing method of municipal solid waste incinerator percolate as claimed in claim 4, it is characterised in that：The step S4-4
Middle to use external ultrafiltration membrane, sludge concentration is 15-30g/L in step S4-1~S4-3, and ultrafiltration membrane system delivery turbidity value is low
In 5NTU, SDI values are less than 5, and ultrafiltration membrane system dope flows back into the nitrification tank in denitrification pond and S4-2 in step S4-1.
6. the processing method of municipal solid waste incinerator percolate as claimed in claim 4, it is characterised in that：The step S4-2
Middle nitrification tank pH is 7~8, and nitrification tank temperature is less than 35 DEG C.
7. the processing method of municipal solid waste incinerator percolate as described in claim 1, it is characterised in that：In step S5 for
The water outlet of step S4 adds acid for adjusting pH value for 6.0~6.5, adds in antisludging agent, then with high-pressure pump by water stream S to 30-40bar,
Flow after pressurization passes through network pipe type reverse osmosis membrane.
8. the processing method of municipal solid waste incinerator percolate as claimed in claim 7, it is characterised in that：Network pipe type will be passed through
The concentrated water of reverse osmosis membrane mixed with the flow after pressurization after again by network pipe type reverse osmosis membrane.
9. the processing method of municipal solid waste incinerator percolate as described in claim 1, it is characterised in that：Further include step
S6 drains into sludge-tank by pump to the sludge generated in step S3 and S4, adds a concentration of 1 ‰~3 ‰ PAM, then be transported to
Centrifugal dehydrator is dehydrated later liquid phase object and is pumped into denitrification pond, and solid formation of the solid content higher than 20% utilizes height after dehydration
Screw pump and pipeline are pressed to trash repository.
10. the processing method of municipal solid waste incinerator percolate as described in claim 1, it is characterised in that：Further include step
S7 collects, then import Biological filter deodorization the foul smell generated in step S1~S5 by GRP pipe.
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| CN111875154A (en) * | 2020-06-24 | 2020-11-03 | 人与自然环保生物科技(南京)有限公司 | High-efficient anaerobic reaction water treatment facilities of food waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110395847A (en) * | 2019-08-02 | 2019-11-01 | 宇创环保产业有限公司 | A kind of domestic garbage burning electricity generation clinker resource utilization Environmental Protection System |
| CN110496434A (en) * | 2019-08-29 | 2019-11-26 | 上海环境卫生工程设计院有限公司 | Desanding de-sludging device and implementation method in landfill leachate system for anaerobic treatment |
| CN111875154A (en) * | 2020-06-24 | 2020-11-03 | 人与自然环保生物科技(南京)有限公司 | High-efficient anaerobic reaction water treatment facilities of food waste |
| CN114057347A (en) * | 2020-07-30 | 2022-02-18 | 北京国环莱茵环保科技股份有限公司 | Full-flow treatment system and treatment method for leachate of waste incineration plant |
| CN114057348A (en) * | 2020-07-30 | 2022-02-18 | 北京国环莱茵环保科技股份有限公司 | Resource recycling treatment system and treatment method for leachate of waste incineration plant |
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