CN106186533A - Processing equipment and percolation liquid treatment method for waste landfill site leachate - Google Patents
Processing equipment and percolation liquid treatment method for waste landfill site leachate Download PDFInfo
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- CN106186533A CN106186533A CN201610645772.XA CN201610645772A CN106186533A CN 106186533 A CN106186533 A CN 106186533A CN 201610645772 A CN201610645772 A CN 201610645772A CN 106186533 A CN106186533 A CN 106186533A
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F2101/163—Nitrates
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a kind of processing equipment for waste landfill site leachate and percolation liquid treatment method, including: biochemical treatment portion, ultrafiltration system and nanofiltration system；The outlet in described biochemical treatment portion connects with the water inlet of described ultrafiltration system；The water inlet of described nanofiltration system connects with the outlet of described ultrafiltration system.Use the processing equipment for waste landfill site leachate that the present invention provides, after making Leachate site carry out biochemical treatment portion, ultrafiltration system and nanofiltration system successively, can efficiently remove nitrate ion therein, therefore, being further added by counter-infiltration system not necessarily like traditional handicraft like that after nanofiltration system and retain nitrate ion, effluent quality can reach discharge standard.
Description
Technical field
The present invention relates to a kind of processing equipment for waste landfill site leachate and percolation liquid treatment method.
Background technology
Waste landfill site leachate refers to that rubbish is being stacked and during landfill due to fermentation and the washing away of precipitation, surface water
The sewage soaked with subsoil water and leach.Leachate site does not contain only substantial amounts of organic pollution.Possibly together with heavy metal and highly concentrated
The holophytic nutrition thing of degree.Garbage leachate has complicated component, water quality and quantity to change huge, Organic substance and ammonia nitrogen concentration is high, micro-
The features such as biological nutrition element ratio imbalance.Along with landfill time lengthening, the biodegradability of Leachate site can drastically decline, it is extremely difficult to place
Reason.If garbage leachate is not dealt carefully with and is directly entered environment, environment will be caused severe contamination.China have at present 90% with
On house refuse use landfill method process.Therefore MSW landfill leachate regulating processes to dispose has become urban construction administration
Person must be in the face of the problem with solution.
Prior art discloses the processing scheme of waste landfill site leachate, as it is shown in figure 1, Fig. 1 is prior art disclosure
Waste landfill site leachate handling process schematic diagram, particularly as follows: from the garbage leachate in refuse landfill from Leachate site
Regulating reservoir is lifted into anaerobic water system by elevator pump and enters anaerobic reactor, and Leachate site is through anaerobic reaction, anaerobic effluent warp
Cross me.mbrane bioreactor MBR intake pump to promote, after bag filter filters, enter me.mbrane bioreactor by water distribution system
MBR, biochemical removal can biochemical Organic substance and carry out biological denitrificaion；Follow-up carry out film process again.
This handling process disclosed in prior art, along with garbage loading embeading time lengthening, the ultra-filtration water effect of biochemical treatment
Fruit is the poorest, it is difficult to biochemical degradation larger molecular organics, and owing to carbon-nitrogen ratio is lacked of proper care, total nitrogen still exceeds standard, for guaranteeing sewage row up to standard
Putting, need to arrange advanced treating after MBR PROCESS FOR TREATMENT, the mode relying primarily on physical filtering retains pollutant and total nitrogen class material,
So making film processing pressure very big, operating cost is high, and film is easily dirty stifled.Therefore waste landfill site leachate system is universal now
There is the problem that operational effect is poor, process water outlet is the most up to standard.
Summary of the invention
It is desirable to provide a kind of processing equipment for waste landfill site leachate and processing method, based on this
Bright, it is possible to the Organic substance in Leachate site to be had higher clearance, and improves the removal effect to total nitrogen.
First aspect, a kind of processing equipment for waste landfill site leachate of the present invention includes: biochemical treatment portion, ultrafiltration
System and nanofiltration system；The outlet in described biochemical treatment portion connects with the water inlet of described ultrafiltration system；Described nanofiltration system
Water inlet connect with the outlet of described ultrafiltration system.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described biochemical treatment portion includes: one-level is raw
Change pond；The nitrification sedimentation tank that water inlet is connected with the outlet of described one-level biochemistry pool；Water inlet and described nitrification sedimentation tank
The denitrification that is connected of outlet adjust pond；Water inlet adjusts, with described denitrification, the secondary biochemical that the outlet in pond is connected
Pond；The denitrification sedimentation tank that water inlet is connected with the outlet in described secondary biochemical pond.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described one-level biochemistry pool and described nitrification
Nitrification sedimentation tank preliminary sedimentation district it is additionally provided with between sedimentation tank；The water inlet in described nitrification sedimentation tank preliminary sedimentation district is biochemical with described one-level
The outlet connection in pond；The described outlet in nitrification sedimentation tank preliminary sedimentation district connects with the water inlet of described nitrification sedimentation tank.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described nitrification sedimentation tank is provided with mud
Outlet；Described processing equipment also includes: import and described nitrification clarifier sludge export be connected sludge concentration tank, import with
Mud reservoir, import that the outlet of described sludge concentration tank is connected export, with described mud reservoir, the sludge dewatering being connected and set
Standby.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described device for dehydrating sladge waste is sheet frame pressure
Filter dewatering system.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described nitrification sedimentation tank preliminary sedimentation district is arranged
Having nitrification liquid bypass outlet, described one-level biochemistry pool to be provided with nitrification liquid backflow import, described nitrification liquid bypass outlet is with described
Nitrification liquid backflow import is connected.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described denitrification is provided with in adjusting pond
Mixing plant；Also include total nitrogen monitoring device, adjust the total nitrogen concentration of pool inner water sample for monitoring described denitrification.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described denitrification sedimentation tank is provided with back
Flow out the mouth of a river；Described denitrification adjustment pond is provided with and passes back into the mouth of a river, and described recycling effluent mouth is connected with the described mouth of a river that passes back into
Logical.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described denitrification sedimentation tank arranges and also sets
It is equipped with sludge reflux outlet；Described one-level biochemistry pool is provided with sludge reflux entrance, the outlet of described sludge reflux and described mud
Reflux inlet is connected.
Preferably, above-mentioned in the processing equipment of waste landfill site leachate, described nanofiltration system outlet is also connected with
There is counter-infiltration system, including the first outlet and the second outlet；The water flowed out through described first outlet can be used for middle water and returns
With or on-demand discharge；Described second outlet is also associated with reverse osmosis concentration liquid treating system；Further, the going out of described nanofiltration system
The mouth of a river connects nanofiltration concentrated solution processing system.
Second aspect, present invention also offers a kind of percolation liquid treatment method, the method based on above-mentioned for garbage loading embeading
The processing equipment of field Leachate site.
Use the processing equipment for waste landfill site leachate that the present invention provides so that Leachate site carries out biochemistry successively
After process portion, ultrafiltration system and nanofiltration system, can efficiently remove nitrate ion therein, therefore, it is not necessary to as traditional handicraft that
Sample is further added by counter-infiltration system after nanofiltration system and retains nitrate ion, and effluent quality can reach table two in GB16889-2008
The discharge standard required.
Accompanying drawing explanation
Fig. 1 is Landfill handling process schematic diagram in prior art；
Fig. 2 is the present invention structured flowchart for the processing equipment first embodiment of waste landfill site leachate；
Fig. 3 A is the present invention structural representation for processing equipment second embodiment of waste landfill site leachate；
Fig. 3 B is the present invention fundamental diagram for processing equipment second embodiment of waste landfill site leachate；
Fig. 4 is to use Fig. 3 A to process waste landfill site leachate for the processing equipment of waste landfill site leachate
Flow chart of steps；
Fig. 5 A is the present invention structural representation for processing equipment the 3rd embodiment of waste landfill site leachate；
Fig. 5 B is the present invention fundamental diagram for processing equipment the 3rd embodiment of waste landfill site leachate.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
It is the present invention structural frames for one embodiment of processing equipment of waste landfill site leachate with reference to Fig. 2, Fig. 2
Figure.
A kind of processing equipment for waste landfill site leachate of the present embodiment includes: biochemical treatment portion 100, ultrafiltration system
200 and nanofiltration system 300；The outlet in biochemical treatment portion 100 connects with the water inlet of ultrafiltration system 200；Nanofiltration system 200
Water inlet connects with the outlet of ultrafiltration system 300.
Use the processing equipment for waste landfill site leachate that the present embodiment provides so that Leachate site is given birth to successively
After change process portion, ultrafiltration system and nanofiltration system, can efficiently remove nitrate ion therein, therefore, it is not necessary to as traditional handicraft
Being further added by counter-infiltration system after nanofiltration system retains nitrate ion like that, and effluent quality can reach table in GB16889-2008
Two discharge standards required.
It is present invention processing equipment the second embodiment for waste landfill site leachate with reference to Fig. 3 A and Fig. 3 B, Fig. 3 A
Structural representation；Fig. 3 B is the present invention fundamental diagram for processing equipment second embodiment of waste landfill site leachate；
In Fig. 3 B, solid line represents main technique, and dotted line is the process of " slave parts " such as backflow, dosing, dope process, excess sludge process
Flow process.
In the processing equipment of the present embodiment waste landfill site leachate, biochemical treatment portion includes: one-level biochemistry pool, water inlet
The anti-nitre that the nitrification sedimentation tank that is connected with the outlet of one-level biochemistry pool, water inlet are connected with the outlet of nitrification sedimentation tank
Change adjustment pond, water inlet adjusts, with denitrification, the secondary biochemical pond that the outlet in pond is connected；Water inlet and secondary biochemical pond
The denitrification sedimentation tank that outlet is connected.
It is further preferred that according to practical situation, be additionally provided with nitrification sedimentation tank between one-level biochemistry pool and nitrification sedimentation tank
Preliminary sedimentation district；The water inlet in nitrification sedimentation tank preliminary sedimentation district connects with the outlet of one-level biochemistry pool；Nitrification sedimentation tank preliminary sedimentation district goes out
The mouth of a river connects with the water inlet of nitrification sedimentation tank.
When being embodied as, according to waste landfill site leachate water water quality situation, when water contains part inorganic impurity
Time, the processing equipment that the present embodiment provides can also arrange pre-treatment pond at one-level biochemistry pool, and pre-treatment pond water inlet is received and filled out
Burying a reservoir area water, pre-treatment pond intercepts the particle diameter particulate matter more than 1mm.
Specifically, in the present embodiment, one-level biochemistry pool can include one-level anaerobic pond and one-level Aerobic Pond, one-level anaerobism
The water inlet in pond is connected with high efficiency anaerobic reactor outlet, the outlet of one-level anaerobic pond and the water inlet of one-level Aerobic Pond
Being connected, the outlet of one-level Aerobic Pond is connected with the water inlet in nitrification sedimentation tank preliminary sedimentation district.
The pollutant such as carbon (C) in Leachate site, nitrogen (N) are removed under the effect of microorganism.In the present embodiment, one
Level biochemistry pool is provided with nitrification liquid reflux inlet, is connected with the nitrification liquid bypass outlet in nitrification sedimentation tank preliminary sedimentation district, and nitrification is sunk
Partial sludge in pond, shallow lake can be back in one-level biochemistry pool, and the active matter biology in partial sludge improves C, N in Leachate site
The clearance of pollutant, nitrification sedimentation tank preliminary sedimentation district and the series connection of nitrification sedimentation tank, can strengthen mud-water separation effect.At the present embodiment
In, the hydraulic detention time in nitrification sedimentation tank preliminary sedimentation district is preferably 1.5 hours～2.5 hours.
In the present embodiment, nitrification sedimentation tank is additionally provided with sludge reflux outlet, one-level biochemistry pool is provided with mud
Reflux inlet, the sludge reflux outlet in nitrification sedimentation tank is connected with the sludge reflux entrance in one-level biochemistry pool.
For the ease of the process to mud, the processing equipment that the present embodiment provides the most also includes sludge concentration tank, mud
Reservoir and filter press system；Nitrification sedimentation tank is provided with sludge outlet, sludge outlet and the sludge inlet in sludge concentration tank
Being connected, the sludge outlet in sludge concentration tank is connected with the sludge inlet in mud reservoir, and the mud in mud reservoir goes out
Mouth is connected with the mud import of filter press system.Mud cake after filter press system is dehydrated can use and be backfilled to rubbish and fill out
The mode burying field processes.In the present embodiment, use the dehydration of filter press system economical, simple to operate, and final mud is aqueous
Rate can be down to 60%, and moisture content processes mud 80% well below centrifugal dehydrator disclosed in prior art or folded spiral shell dewaterer
Moisture content.
From Fig. 3 A and Fig. 3 B it can be seen that the processing equipment set by the present embodiment includes water inlet and nitrification sedimentation tank
The denitrification that outlet is connected adjusts pond.Denitrification adjusts pond and has the effect of regulation pH value；And in the present embodiment, also wrap
Include total nitrogen monitoring device, in order to monitor the concentration that denitrification adjusts the total nitrogen in pond, control follow-up place according to the total nitrogen concentration measured
Reason structures need to add how many carbon sources, thus adjusts the growing environment of microorganism, improve the denitrification effect in Two-Stage Biochemical pond.?
In the present embodiment, total nitrogen monitoring device can be provided in denitrification and adjust the total nitrogen meter room above pond, it is also possible to supervise for total nitrogen
Survey mobile device.In the present embodiment, the setting in denitrification adjustment pond makes the Leachate site after secondary biochemical treatment only through anti-
Nitrification sedimentation tank, invests low, less energy consumption, and without the external or built-in ultrafilter membrane conduct in prior art MBR system
The equipment of mud-water separation, without dirty stifled problem.
In the present embodiment, denitrification adjusts pond and is provided with carbon source entrance, in order to add additional carbon, to adjust microorganism
Growing environment.
The processing equipment that the present embodiment provides includes that water inlet adjusts, with denitrification, the secondary biochemical that pond outlet is connected
The pollutant such as pond, in secondary biochemical pond, carries out secondary biochemical treatment to Leachate site, C, the N in further removing Leachate site.?
In the present embodiment, secondary biochemical pond includes that secondary anaerobic pond and two grades of Aerobic Ponds, the water inlet in secondary anaerobic pond are adjusted with denitrification
The outlet in whole pond is connected, and the water inlet of the outlet in secondary anaerobic pond and two grades of Aerobic Ponds is connected, two grades of Aerobic Ponds
Outlet is connected with the water inlet of denitrification sedimentation tank.
The processing equipment that the present embodiment provides includes the denitrification precipitation that water inlet is connected with secondary biochemical pond outlet
Pond.In the present embodiment, denitrification sedimentation tank is vertical sedimentation tank, it is possible to select inclined-plate clarifying basin or other form sedimentation tanks.
In the present embodiment, denitrification sedimentation tank is provided with sludge reflux outlet, and denitrification adjustment pond is provided with mud and returns
Inflow entrance, one-level biochemistry pool is also equipped with sludge reflux entrance, and the sludge reflux outlet of denitrification sedimentation tank adjusts with denitrification
Sludge reflux entrance in the sludge reflux entrance in pond and one-level biochemistry pool is connected.
In the present embodiment further embodiment, denitrification sedimentation tank is additionally provided with denitrification liquid bypass outlet, denitrification
Adjusting pond and be additionally provided with denitrification liquid reflux inlet, denitrification liquid bypass outlet is connected with denitrification liquid reflux inlet.
In the present embodiment, Sand Filtration System, water inlet that water inlet is connected also are included with denitrification sedimentation tank outlet
The UF ultrafiltration system that is connected with Sand Filtration System outlet, water inlet are connected with UF ultrafiltration system outlet NF nanofiltration system
System.It should be noted that filter sand system is to ultrafiltration system protective measure, dispensable ingredient.
Sand Filtration System is provided with quartz sand, UF ultrafiltration system is provided with ultrafilter membrane, NF nanofiltration system is provided with and receives
Filter membrane.In the present embodiment, Sand Filtration System and UF ultrafiltration system are the security measures of NF.In the present embodiment, need when draining
When reaching table 2 standard in GB16889-2008, the UF ultrafiltration system in Treated sewage reusing membranous system and NF nanofiltration system, warp can be opened
Water outlet after sand filtration, ultrafiltration and nanofiltration, draining is directly entered the water body in environment.
After NF nanofiltration system processes, produce larger amount of nanofiltration concentrated solution, in order to not increase, nanofiltration concentrated solution be transported outward
The cost processed, the processing equipment that the present embodiment provides the most also includes nanofiltration concentrated solution processing system, and nanofiltration concentrated solution processes
System is connected with the concentrated solution outlet of NF nanofiltration system, and nanofiltration concentrated solution enters in nanofiltration concentrated solution processing system to be located
Reason, the dope after process can decrement.Nanofiltration concentrated solution is processed as humic acid through nanofiltration concentrated solution processing system, accounts for nanofiltration and concentrates
The 0.5% of liquid total amount, the calorific value of humic acid is higher, can use as fuel, make fertilizer or outward transport process.
See Fig. 4, it is shown that leachate treatment schematic flow sheet.Comprise the steps:
Step S1, Landfill is carried out pre-treatment by the present embodiment.In the present embodiment, by the Leachate site of landfill yard
The most first carry out filtering and gravitational settling, the impurity such as the floating thing that is filtered to remove in Leachate site, float, gravitational settling segregation ratio
The gravel that weight is bigger.The water outlet of gravitational settling carries out homogenizing and all measures, and homogenizing is all measured and carried out in pre-treatment pond, at the present embodiment
In, the surface loading in pre-treatment pond is preferably 0.4m3/(m2×h)±0.1m3/(m2× h), the name time of staying is more preferably at least
8h；In the present embodiment, more long process effect of the above-mentioned time of staying is the best, but in view of construction cost, what the application was given is
Minima.
Step S2, after carrying out pre-treatment desanding, the Landfill water outlet obtained is carried out one-level by the present embodiment successively
Biochemical treatment, nitrification precipitation, denitrification adjustment, secondary biochemical treatment and denitrification precipitation.
In the present embodiment, one-level biochemical treatment preferably includes one-level anoxic treatment and one-level Aerobic Process for Treatment.One-level anoxia
The hydraulic detention time processed is preferably not less than 8h, and more preferably 8h～10h, one-level anoxic treatment is entered the most under agitation
OK；The hydraulic detention time of one-level Aerobic Process for Treatment is preferably not less than 5d, more preferably 5d～8d；In the present embodiment, above-mentioned two
The item time of staying more long process effect is the best, but in view of construction cost, the technical scheme that the embodiment of the present application provides is water conservancy
The minima of the time of staying.In one-level Aerobic, nitrification liquid refluxes, and the reflux ratio of nitrification liquid is preferably 2.
In the present embodiment, the hydraulic detention time that denitrification adjustment processes is preferably 8h ± 2h, more preferably 8h ± 1h,
During denitrification adjusts, the present embodiment adjusts the nitrate nitrogen concentration in pond according to denitrification and controls the dosing of follow-up methanol
Amount.
In the present embodiment, secondary biochemical treatment includes two grades of anoxic treatment and two grades of Aerobic Process for Treatment.Two grades of anoxic treatment
Carrying out the most under agitation, the hydraulic detention time of two grades of anoxic treatment is preferably 8h ± 1h；Two grades of Aerobic Process for Treatment are preferred
Carrying out under aeration condition, the hydraulic detention time of two grades of Aerobic Process for Treatment is preferably 8h ± 1h.
In the present embodiment, nitrification precipitation is precipitated mud, and precipitating sludge is preferably carried out filter press by the present embodiment,
Precipitating sludge is carried out processed.The present embodiment is stored after preferably being concentrated by precipitating sludge, and the mud of storage carries out plate
Frame filter pressing processes, and the mud cake that filter press obtains after processing carries out burning disposal.
Step S3, in the present embodiment, denitrification precipitation obtain supernatant, carry out successively sand filtration process, hyperfiltration treatment and
Nanofiltration processes.Supernatant after above-mentioned subsequent treatment, eliminate in supernatant major part divalent ion and molecular weight 200～
The Organic substance of 1000, the most removable a small amount of monovalent ion, reach discharge standard.
Step S4, in the present embodiment, comprehends generation concentrated solution at nanofiltration, concentrated solution preferably carries out concentrated solution process, point
Leaving away except the humus in concentrated solution and polyvalent metal ion, nanofiltration concentrated solution processing system water outlet reaches discharge standard, only
The humic acid dope of 0.5%, can transport outward process or make fertilizer.
It is present invention processing equipment the 3rd embodiment for waste landfill site leachate with reference to Fig. 5 A and Fig. 5 B, Fig. 5 A
Structural representation；Fig. 5 B is the present invention fundamental diagram for processing equipment the 3rd embodiment of waste landfill site leachate.
This embodiment is the further optimization to Fig. 3 A and Fig. 3 B embodiment.In Fig. 5 B, solid line represents main technique, and dotted line is backflow, adds
The handling process of the process of medicine, dope, excess sludge process etc. " slave part ".
From Fig. 5 A and Fig. 5 B it can be seen that in the present embodiment, also include that water inlet is connected with NF nanofiltration system outlet
Logical RO counter-infiltration system.RO counter-infiltration system is provided with reverse osmosis membrane.
In the present embodiment, Sand Filtration System, UF ultrafiltration system, NF nanofiltration system constitute membranous system, can individually open
UF ultrafiltration system in Treated sewage reusing membranous system and NF nanofiltration system, it is also possible to open UF ultrafiltration system, NF nanofiltration system and RO
Counter-infiltration system (requires according to different water outlets).In the present embodiment, need, when draining, table 2 standard in GB16889-2008 that reaches
Time, the UF ultrafiltration system in Treated sewage reusing membranous system and NF nanofiltration system, water outlet after sand filtration, ultrafiltration and nanofiltration, row can be opened
Water is directly entered the water body in environment；Sand filtration, ultrafiltration, nanofiltration and anti-is opened when drainage requirement is more tightened up than above-mentioned table 2 standard
Water outlet again after infiltration.
Further, the processing equipment that the present embodiment provides the most also includes reverse osmosis concentration liquid treating system, reverse osmosis concentration
Liquid treating system is connected with the concentrated solution outlet of RO counter-infiltration system, and the concentrated solution that RO counter-infiltration system produces enters into reverse osmosis
Thoroughly processing in concentrated solution processing system, concentrated solution after treatment only accounts for 10% (common technique of former concentrated solution total amount
RO dope has 30%), the reverse osmosis concentrated liquid of process can transport outward process.Reach the row required than table in GB16889-2008 two
The standard that standard of putting is stricter.
Use the processing equipment for waste landfill site leachate that the present invention provides so that Leachate site carries out one-level successively
Biochemical treatment, nitrification precipitation, denitrification adjust, secondary biochemical treatment and denitrification precipitation, and that efficiently removes in Leachate site is organic
Thing, and realize efficient denitrification.Test result indicate that, Leachate site is processed by the processing equipment that the present invention provides, biochemical system
Water outlet total nitrogen content can be down to 20mg/L, well below hundreds of disclosed in prior art or even thousands of milligrams per liter.
On the other hand, present invention also offers a kind of percolation liquid treatment method, the method based on above-mentioned for garbage loading embeading
The processing equipment of field Leachate site.Further, the method above-mentioned processing equipment is illustrated time, be described.At this not
Repeat again.With reference to described above.
Below it is only the preferred implementation of the present embodiment, it is noted that for those skilled in the art
For, on the premise of without departing from the present embodiment principle, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as the protection domain of the present embodiment.
Claims (10)
1. the processing equipment for waste landfill site leachate, it is characterised in that including:
Biochemical treatment portion, ultrafiltration system and nanofiltration system；The outlet in described biochemical treatment portion and the water inlet of described ultrafiltration system
Mouth connection；The water inlet of described nanofiltration system connects with the outlet of described ultrafiltration system.
Processing equipment the most according to claim 1, it is characterised in that described biochemical treatment portion includes:
One-level biochemistry pool；
The nitrification sedimentation tank that water inlet is connected with the outlet of described one-level biochemistry pool；
The denitrification that water inlet is connected with the outlet of described nitrification sedimentation tank adjusts pond；
Water inlet adjusts, with described denitrification, the secondary biochemical pond that the outlet in pond is connected；
The denitrification sedimentation tank that water inlet is connected with the outlet in described secondary biochemical pond.
Processing equipment the most according to claim 2, it is characterised in that
Nitrification sedimentation tank preliminary sedimentation district it is additionally provided with between described one-level biochemistry pool and described nitrification sedimentation tank；
The described water inlet in nitrification sedimentation tank preliminary sedimentation district connects with the outlet of described one-level biochemistry pool；
The described outlet in nitrification sedimentation tank preliminary sedimentation district connects with the water inlet of described nitrification sedimentation tank.
Processing equipment the most according to claim 3, it is characterised in that
Described nitrification sedimentation tank is provided with sludge outlet；
Described processing equipment also includes: import and described nitrification clarifier sludge export be connected sludge concentration tank, import with
Mud reservoir, import that the outlet of described sludge concentration tank is connected export, with described mud reservoir, the sludge dewatering being connected and set
Standby.
Processing equipment the most according to claim 4, it is characterised in that
Described device for dehydrating sladge waste is filter press dewatering system.
6. according to the processing equipment according to any one of claim 3 to 5, it is characterised in that
Described nitrification sedimentation tank preliminary sedimentation district is provided with nitrification liquid bypass outlet, and described one-level biochemistry pool is provided with nitrification liquid and flows back into
Mouthful, described nitrification liquid bypass outlet is connected with the backflow import of described nitrification liquid.
Processing equipment the most according to claim 6, it is characterised in that
Described denitrification is provided with mixing plant in adjusting pond；
Also include total nitrogen monitoring device, adjust the total nitrogen concentration of pool inner water sample for monitoring described denitrification.
Processing equipment the most according to claim 7, it is characterised in that
Described denitrification sedimentation tank is provided with recycling effluent mouth；
Described denitrification adjustment pond is provided with and passes back into the mouth of a river, and described recycling effluent mouth is connected with the described mouth of a river that passes back into；
Described denitrification sedimentation tank arranges and is additionally provided with sludge reflux outlet；
Described one-level biochemistry pool is provided with sludge reflux entrance, and the outlet of described sludge reflux is connected with described sludge reflux entrance
Logical.
Processing equipment the most according to claim 8, it is characterised in that
Described nanofiltration system outlet is also associated with counter-infiltration system, including the first outlet and the second outlet；
The water flowed out through described first outlet can be used for Treated sewage reusing or on-demand discharge；
Described second outlet is also associated with reverse osmosis concentration liquid treating system；And
The outlet of described nanofiltration system connects nanofiltration concentrated solution processing system.
10. a percolation liquid treatment method, it is characterised in that the method based on as claim 1 to according to any one of use
Processing equipment in waste landfill site leachate.
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| CN110563176A (en) * | 2019-09-17 | 2019-12-13 | 贵州欧瑞欣合环保股份有限公司 | landfill leachate stage filtration processing system |
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Address after: Tianchuang Technology Building No. 8 Beijing City 100080 square Haidian District road 406 Applicant after: Beijing Zhongke Runyu Environmental Protection Technology Co.,Ltd. Address before: Tianchuang Technology Building No. 8 Beijing City 100080 square Haidian District road 406 Applicant before: BEIJING RUNYU ENVIRONMENTAL PROTECTION ENGINEERING Co.,Ltd. |
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Application publication date: 20161207 |