CN105776775B - A kind of group technology of landfill leachate treatment - Google Patents

A kind of group technology of landfill leachate treatment Download PDF

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CN105776775B
CN105776775B CN201610315903.8A CN201610315903A CN105776775B CN 105776775 B CN105776775 B CN 105776775B CN 201610315903 A CN201610315903 A CN 201610315903A CN 105776775 B CN105776775 B CN 105776775B
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tank
treatment
electrode
reactor
short distance
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CN105776775A (en
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李柏林
杨丹丹
孙晓辉
赵维鑫
刘振
樊航旭
李晔
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Shanghai bizhou environmental protection energy technology Co., Ltd
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Wuhan University of Technology WUT
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/725Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/78Treatment of water, waste water, or sewage by oxidation with ozone
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2846Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The present invention provides a kind of garbage leachate treatment process, landfill leachate passes sequentially through pretreatment system, main body biological treatment system and advanced treatment system, pretreatment system is made of conditioning tank, adsorption tank and coagulating basin, and waste water successively passes through above-mentioned apparatus and pre-processed;Water outlet enters main body biological treatment system, main body biological treatment system includes anaerobism EGSB reactor, A/O short distance nitration reaction tank, Anammox UASB reactor, the above-mentioned processing unit carries out real-time monitoring by PLC control system, carries out removal of carbon and nitrogen reaction;Water outlet is further processed into advanced treatment system, the advanced treatment system includes two-stage coagulation pond, level-one homogeneous catalysis ozone oxidation reaction pond, bis- biological reaction pools of MBR, second level homogeneous catalysis ozone oxidation reaction pond, and organic matter and total nitrogen, the ammonia nitrogen of final outflow water all reach discharge standard.The present invention has the advantages that efficient denitrification except carbon, energy-saving, stable, while realizing the purpose of zero concentrate generation.

Description

A kind of group technology of landfill leachate treatment
Technical field
The present invention relates to environmental protection technical fields, and in particular to a kind of group technology of landfill leachate treatment.
Background technique
Contain a large amount of organic pollutants, nitrogen substance and type in the landfill leachate that municipal refuse sanitary landfills generates Numerous heavy metal substances can become grave danger of ambient enviroment if dealt with improperly.Ammonia nitrogen especially contained therein, It is the key factor of percolate stabilization processes;And excessively high ammonia nitrogen concentration can inhibit at the normal growth and biochemistry of microorganism The effect of reason." landfill leachate discharge standard " (GB16889-2008) that country promulgates is increased to total nitrogen discharged standard, It is required that the total nitrogen concentration of water outlet is less than 40 mg/L, so far, it is still a great problem in landfill leachate treatment.Currently, rubbish The processing of rubbish percolate generallys use the process combination of " pretreatment+biological treatment+advanced treating ".In landfill leachate treatment city More mature advanced treatment process is the membrane process such as ultrafiltration, nanofiltration on field, can although treated that supernatant is up to standard through nanofiltration Direct emission, but the concentrate coloration generated after nanofiltration separation is deep, salinity is high, COD is mainly humic acid material difficult to degrade, It is difficult to handle, often takes back the modes such as spray, recharge landfill or outward transport processing to dispose, easily formation secondary pollution.This part accounts for about always The 40% of water is handled, process energy consumption is big, and operation and investment cost are high, so the processing of concentrate is landfill leachate treatment mistake Another hang-up in journey.Generally speaking, traditional handicraft there are complex treatment process, chemical consumption amount is big, at high cost, place The defects of landfill leachate is not total nitrogen discharged up to standard, concentrate processing is not up to standard after reason.
Short distance nitration-anaerobic ammoxidation tandem process is work most economical, most succinct in current wastewater biological denitrificaion field One of skill.Short distance nitration technology is to control biological nitrification process in the ammoxidation stage, makes NH4 +- N is being converted into NO2 -After-N No longer it is changed into NO3 --N;Anammox technology is by NH4 +- N and NO2 -- N is converted into the bioreaction technology of nitrogen. And short distance nitration-anaerobic ammoxidation group technology then combines the advantages of two kinds of technologies, it, should for traditional denitrification process Technique has many advantages, such as that oxygen demand is low, be not necessarily to organic carbon source, surplus sludge volume is few, nitric efficiency is high.
In addition, the strong oxidation of ozone, can be degraded to easily biological-degradable for the hardly degraded organic substance in landfill leachate Organic matter, improve its biodegradability, subsequently through MBR technique two stage biological processing and ozone deep oxidation, make water outlet have Machine object qualified discharge.The purpose of decoloration, deodorization is realized simultaneously.Ozone strong oxidizing further treatment technique is, it can be achieved that landfill leachate The purpose of " zero concentrate " thoroughly solves the problems, such as that concentrate difficulty is set in traditional handicraft, cost of disposal is high.
Therefore, how one of research hotspot will just be become in the processing of both the above technical application to landfill leachate.
Summary of the invention
The object of the present invention is to provide a kind of group technologies of landfill leachate treatment, pass through anaerobic technology, autotrophic denitrification Technology is organically combined with ozone high grade oxidation technology, is learnt from other's strong points to offset one's weaknesses, to have high ammonia nitrogen removal frank, high chroma removal rate, height COD removal rate, stable, adaptable to change of water quality, expense is lower, zero concentrate generate the advantages that.
To achieve the goals above, The technical solution adopted by the invention is as follows:
A kind of group technology of landfill leachate treatment, includes the following steps:
(1) landfill leachate is pre-processed through adsorption tank, coagulating basin;
(2) after the water outlet of coagulating basin is mixed with the phegma of anaerobic ammonia oxidation reactor, in anaerobism EGSB reactor into The reaction of row simultaneous denitrification and methanogenesisization;
(3) Anaerobic Treatment water outlet 55%-60% enters A/O short distance nitration reaction tank, and remainder enters collecting-tank II;
(4) water outlet of A/O short distance nitration is with the anaerobism liquid in collecting-tank II after 1:1 is mixed by volume, in UASB anaerobism ammonia Denitrification reaction is carried out in oxidation reactor;
(5) water outlet of anaerobic ammonia oxidation reactor enters zero concentrate advanced treatment system, successively by two-stage coagulation After reason, level-one homogeneous catalysis ozone Oxidation Treatment, bis- biological treatments of MBR, second level homogeneous catalysis ozone Oxidation Treatment, row up to standard It puts.
According to above scheme, the PLC control system is handled the Anaerobic Treatment, short distance nitration, at Anammox Reason carries out real-time control:
First liquid flow sensor is installed on reflux line before the anaerobism EGSB reactor, is equipped in the middle part of reactor The water inlet of first temperature sensor, fluid current meter, the first pH electrode, A/O short distance nitration reaction tank is equipped with second liquid stream Quantity sensor is equipped with second temperature sensor, DO electrode, the 2nd pH electrode, first in the aerobic zone of A/O short distance nitration pond Ammonia nitrogen electrode sets gas flow sensor on aerated conduit;Connection collecting-tank II before the anaerobic ammonia oxidation reactor Water inlet line is equipped with third liquid flow sensor, and third temperature sensing is equipped in the UASB anaerobic ammonia oxidation reactor Device, the 3rd pH electrode, ORP electrode, the 2nd NH4 +N electrode, NO2 -N electrode;Above-mentioned each on-line computing model is controlled with PLC respectively System connection;
Collected signal is shown in man-machine interface by the PLC control system, is calculated according to operation program Real time control variables carry out real-time monitoring to the pump, heating device, aerator, the motor-driven valve that are connected with PLC control system.
According to above scheme, the biogas that the Anaerobic Treatment generates is delivered to biogas storage tank, after purification, burning, for adding The heat short distance nitration processing, Anammox processing unit, after-heat provide the electricity that uses of full factory, in fact for generating electricity Existing power self-support.
According to above scheme, the advanced treating is the group technology of MBR bis- biological treatments and ozone Oxidation Treatment, packet Include two-stage coagulation processing, level-one homogeneous catalysis ozone Oxidation Treatment, bis- biological treatments of MBR, second level homogeneous catalysis ozone oxidation Zero concentration liquor treating process is really realized in processing.
According to above scheme, catalyst used in the first homogeneous catalysis ozone Oxidation Treatment is liquid catalyst, Wherein contain Mn2+、Ag+Equal transition metal ions.
According to above scheme, the ozone tail gas generated in the advanced treating enters ozone tail gas decomposer after collection It is discharged after processing.
Each technological principle of the invention is as follows:
A. absorption and coagulation:
Landfill leachate enters adsorption tank after initially entering conditioning tank regulating water quality, balanced water, adds in adsorption tank A certain amount of adsorbent, after fully reacting water outlet enter coagulating basin in, coagulant and flocculation aid-under the action of, carry out coagulation Sediment in reaction, adsorption tank and coagulating basin is sent into sludge concentration tank by pump and pipeline.
B. Anaerobic Treatment (simultaneous denitrification and methanogenesisization processing):
By absorption and coagulation, treated after landfill leachate mixes with the phegma of Anammox reaction tank, into detesting Oxygen reaction tank, for control pH in 7-8, temperature is 30-35 DEG C, after mixed liquor is contacted with base sludge, first progress denitrification, acetic acid Equal volatile fatty acids can be used as denitrifying organic carbon source, remove the nitrate nitrogen in Anammox phegma, improves and is The nitrogen removal rate of system, while generating a large amount of basicity;It then will be in percolate under acid-producing bacteria effect in expanded granular sludge Larger molecular organics hydrolysis acidification be small organic molecule, be then passed through anaerobic bacteria, the absorption of facultative aerobe, fermentation, methane phase Collective effect be broken down into methane or carbon dioxide;The liquid for carrying biogas rises to top after three phase separator, dirty Mud drops back into reaction zone, and biogas is delivered in biogas storage tank, and water section carries out interior reflux, partially as water outlet outflow.
C. short distance nitration:
By the anoxic zone of simultaneous denitrification and methanogenesis treated percolate part enters A/O short distance nitration reaction tank, Aerobic zone is flowed into after further removing organic matter, controlling pH in aerobic zone, in 7.5-8.0, temperature is 25-30 DEG C, subsequent start-up exposure Gas and stirring system, maintaining the DO in reaction process is 2.0mg/L or so, and nitrifying process is made to stop at nitrite stage, root According to the ammonia nitrogen concentration in online ammonia nitrogen electrode real time monitoring reaction tank, and influent ammonia nitrogen loading is adjusted by PLC system in time, made Average FA(free ammonia in reaction tank) it is lower than 10mg/L, inhibited by FA and real-time control makes short distance nitration realize 95% or more Cultured water cumulative percentage.
D. Anammox:
Through short distance nitration, treated that percolate enters Anammox UASB reactor, at the anaerobism in collecting-tank II After reason liquid is mixed in a certain ratio, by the online NO for being mounted on water inlet2 -N electrode, NH4 +N electrode carries out real-time monitoring, makes Water inlet NO2 --N/NH4 +- N=1.32, running temperature is controlled at 35 DEG C, upflow velocity 1-2m/h, in anaerobic ammonium oxidation granular dirt It is reacted under the action of mud, NO can be made2 --N、NH4 +The removal rate of-N reaches 90% or more, and the three-phase separate at the top of reacted device Mud-water separation is carried out from device.
E. advanced treating:
The water outlet of Anammox reaction tank enters zero concentrate advanced treatment system, including two-stage coagulation pond, first are Phase O3 catalytic oxidation reaction tank, MBR film reaction pond, the second ozone oxidation reaction pond.The water outlet of anaerobic ammonia oxidation reactor into Enter flocculation sedimentation tank, makes hardly degraded organic substance, the metal ion of part macromolecular with heavy under the action of coagulant and flocculant Starch form removes, and after precipitating, supernatant enters level-one homogeneous catalysis ozone oxidation reaction pond, under liquid catalyst effect, Using the strong oxidizing property of ozone, the hardly degraded organic substance in landfill leachate is enable to be degraded to the organic matter of easily biological-degradable, Improve its biodegradability;Water outlet enters MBR film reaction pond, and immersion MBR membrane treatment appts are designed in MBR reaction tank, carries out Nitrification and denitrification reaction, further removes the pollutants such as organic matter, ammonia nitrogen, and internal or external membrane module carries out efficient Ground is separated by solid-liquid separation, and reduces pollutant concentration in water outlet;Water outlet enters second level homogeneous catalysis ozone oxidation reaction pond, degrading waste water In remaining a small amount of biorefractory organic, while having the effects that decoloration, deodorization, make to be discharged stably reaching standard.
The beneficial effects of the present invention are:
1) main body bioprocess technology of the present invention uses " anaerobism EGSB reactor+A/O short distance nitration reaction tank+UASB anaerobism ammonia Oxidation reactor " treatment process sufficiently combines anaerobism EGSB efficiently to remove the accumulation of the pond COD, A/O nitrite, Anammox The advantage for removing total nitrogen, making the present invention with being not required to, additional carbon, aeration energy consumption are low, nitric efficiency is high, system run all right, remain The advantages that remaining sludge yield is few;
2) advanced treatment process of the invention uses " flocculation sedimentation tank+level-one homogeneous catalysis ozone oxidation reaction pond+MBR Reaction tank+second level homogeneous catalysis ozone oxidation reaction pond " technique fully achieves the discharge of zero concentrate, solves traditional nanofiltration, anti- The unavoidable concentrate difficulty handling problems of film process such as infiltration;
3) biogas that system for anaerobic treatment of the invention generates is delivered to biogas storage tank, after purification, burning, for heating Short distance nitration processing, Anammox processing unit are stated, for after-heat for generating electricity, provide full factory uses electricity, realizes energy From giving;
4) present invention uses PLC control system, it can be achieved that carrying out real-time control, guarantor to the service condition of main body bioprocess technology Demonstrate,prove the stable operation for the treatment of process;
5) in the first, second O3 catalytic oxidation reaction tank of the invention, liquid catalyst (Mn is added2+、Ag+) promote it is smelly The decomposition reaction of oxygen in water, generates more living radicals, and the removal rate of COD in percolate has been significantly increased, and The ozone dosage of consumption greatly reduces;
6) ozone tail gas that ozone advanced treating of the invention generates, after the processing of ozone tail gas decomposer is entered after collection Discharge, avoids to environmental danger.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention;
Fig. 2 is the PLC control system schematic block diagram of main body biochemical processing process of the invention;
Fig. 3 is the PLC On-line Control flow chart of the anaerobic reaction of main body biochemical processing process of the invention;
Fig. 4 is the PLC On-line Control flow chart of the short distance nitration reaction of main body biochemical processing process of the invention;
Fig. 5 is the PLC On-line Control flow chart of the Anammox reaction of main body biochemical processing process of the invention.
In figure: 1, conditioning tank;2, adsorption tank;3, coagulating basin;4, collecting-tank I;5, anaerobism EGSB reactor;6, A/O short distance Nitration reaction pond;7, collecting-tank II;8, UASB anaerobic ammonia oxidation reactor;9, coagulative precipitation tank;10, the first homogeneous catalysis ozone Oxidation reaction pond;11, MBR film reaction pond;12, the second ozone oxidation reaction pond;F1, biogas storage tank;F2, sludge concentration tank; F3, centrifugal dehydrator;F4, ozone tail gas decomposer.
Specific embodiment
Technical solution of the present invention is illustrated with embodiment with reference to the accompanying drawing.
The present invention provide a kind of landfill leachate treatment group technology (see Fig. 1 to Fig. 5), comprise the following specific steps that:
1) absorption and coagulation pre-processes:
Landfill leachate enters adsorption tank 2 after initially entering 1 regulating water quality of conditioning tank, balanced water, throws in adsorption tank Add a certain amount of adsorbent (the cheap adsorbent such as flyash), opens mixing plant, be adjusted to Rational Rotation Speed, carry out at absorption Reason after fully reacting, stops stirring, stands, and adsorption tank water outlet enters in coagulating basin 3, adds in the coagulating basin 3 a certain amount of Coagulant (the contour poly- coagulant of bodied ferric sulfate) and flocculation aid PAM, adjust pH to 7.5-8.5(pH regulator use lime) Mixing plant is adjusted to Rational Rotation Speed, coagulating treatment is carried out, is being stirred to react after a certain period of time, it is static, open the coagulation The water outlet in pond 3, the adsorption tank 2 are sent into sludge concentration tank with the sediment in coagulating basin 3 by pump and pipeline, and absorption is passed through Coagulation pretreatment can remove most of suspended state organic matter and suspended matter, reduce heavy metal concentration, improve biodegradability;
2) Anaerobic Treatment (simultaneous denitrification and methanogenesis processing):
By the phegma of absorption and coagulation treated landfill leachate and UASB anaerobic ammonia oxidation reactor 8 in collecting-tank After I 4 is mixed, into the water distribution area of anaerobism EGSB reactor 5, alkali liquid tank is connected by the alkali liquor pipe with dosing pump with water inlet It is logical, basicity is replenished in time by PLC system regulation, controlling pH in reactor, in 7-8, reactor is externally provided with water-bath interlayer, maintains Temperature is at 30-35 DEG C, upflow velocity 1-6m/h, and after mixed liquor is contacted with base sludge, progress denitrification, acetic acid etc. are waved first Hair property fatty acid can be used as denitrifying organic carbon source, removes the nitrate nitrogen in Anammox phegma, improves system Nitrogen removal rate, while generating a large amount of basicity;It then will be big in percolate under acid-producing bacteria effect in expanded granular sludge Molecular organic hydrolysis acidification is small organic molecule, is then passed through anaerobic bacteria, the absorption of facultative aerobe, fermentation, methane phase are total to Same-action is broken down into methane or carbon dioxide;The liquid for carrying biogas rises to top after three phase separator, and sludge is fallen Reaction zone is returned, biogas is delivered in biogas storage tank F1, and water section enters the interior bypass outlet on anaerobism EGSB side wall, by having The interior return pipe of interior reflux pump carries out interior reflux, and as water outlet outflow, 40-45% is discharged to be entered in collecting-tank II 6 another part;
3) short distance nitration is handled:
By the anoxic of simultaneous denitrification and methanogenesis treated percolate 55-60% enters A/O short distance nitration reaction tank 6 Area enters aerobic zone after further removing organic matter, and controlling pH in aerobic zone, in 7.5-8.0, temperature is 25-30 DEG C, then beats Mixing plant is opened, the aerating system being made of aeration head, air blower, gas flow sensor and air control valve, dimension are started Holding the DO in reaction process is 2mg/L or so, monitors the ammonia nitrogen concentration in reaction tank in real time according to online ammonia nitrogen electrode, and pass through PLC system regulates and controls influent ammonia nitrogen loading, makes the average FA in reaction tank lower than 10mg/L, inhibits to make with real-time control by FA short Journey nitrification realizes 95% or more cultured water cumulative percentage, and water outlet is pumped into the UASB anaerobic ammonia oxidation reactor 8;
4) Anammox is handled:
Enter the UASB anaerobic ammonia oxidation reactor 8 through the short distance nitration treated percolate, catchments with described 1:1 is mixed Anaerobic Treatment liquid in pond II 7 by volume, by the online NO for being mounted on water inlet2 -N electrode, NH4 +N electrode Real-time monitoring is carried out, is made into water NO2 --N/NH4 +NO is worked as in-N=1.322 --N/NH4 +When-N > 1.32, it is appropriate to be controlled by PLC system Increase the flow for entering the UASB anaerobic ammonia oxidation reactor 8 from the collecting-tank II 7, on the contrary, working as NO2 --N/NH4 +-N Appropriate to reduce the flow for entering anaerobic ammonia oxidation reactor from the collecting-tank II 7 when < 1.32, running temperature is controlled 35 DEG C, upflow velocity 1-2m/h, ORP range is -200mV-50mV, is reacted, can be made under the action of anaerobic ammonia oxidizing bacteria NO2 --N、NH4 +The removal rate of-N reaches 90% or more, and the three phase separator at the top of reacted device carries out mud-water separation;
5) advanced treating:
The water outlet of anaerobic ammonia oxidation reactor is equal into zero concentrate advanced treatment system, including coagulative precipitation tank 9, level-one Phase O3 catalytic oxidation reaction tank 10, MBR film reaction pond 11, second level homogeneous catalysis ozone oxidation reaction pond 12, the UASB detests The water outlet of anaerobic ammonium oxidation reactor 8 enters the coagulative precipitation tank 9, in coagulant (aluminium polychloride, 50-1000mg/L) and wadding Under the action of solidifying agent (PAM, 5-20mg/L), go the hardly degraded organic substance of part macromolecular, metal ion with precipitated form It removes, reduce the COD concentration in percolate and eliminates toxicity, precipitated in the form of sloping plate deposition, supernatant enters The level-one homogeneous catalysis ozone oxidation reaction pond 10, in liquid catalyst (generally metal transfer ion, Mn2+、Ag+Deng) make Under, using the strong oxidizing property of ozone, the hardly degraded organic substance in landfill leachate is enable to be degraded to having for easily biological-degradable Machine object improves its biodegradability;Water outlet enters MBR film reaction pond 11, and immersion is used in MBR film reaction pond 11 MBR membrane treatment appts carry out nitrification and denitrification reaction, further remove COD, BOD, ammonia nitrogen etc., internal or external film Component is efficiently separated by solid-liquid separation;It is discharged and enters the second level homogeneous catalysis ozone oxidation reaction pond 12, it is residual in degrading waste water The a small amount of difficult biochemistry COD stayed, while having the effects that decoloration, deodorization, so that water outlet is stably reached " household refuse landfill sites pollution control Standard processed " (GB16889-2008) discharge standard.
Further, the first liquid flow sensor is installed on reflux line before the anaerobism EGSB reactor 5, instead It answers and is equipped with the first temperature sensor, fluid current meter, the first pH electrode in the middle part of device, before the water inlet of A/O short distance nitration reaction tank Equipped with second liquid flow sensor, second temperature sensor, DO are equipped in 6 aerobic zone of A/O short distance nitration reaction tank Electrode, the 2nd pH electrode, the first ammonia nitrogen electrode set gas flow sensor on aerated conduit;In the UASB Anammox The water inlet line of connection collecting-tank II before reactor 8 is equipped with third liquid flow sensor, in the UASB anaerobism ammonia oxygen Change and is equipped with third temperature sensor, the 3rd pH electrode, ORP electrode, the 2nd NH in reactor 84 +N electrode, NO2 -N electrode;On The signal that stating device will test passes to PLC control system, and is shown in man-machine interface, is calculated according to operation program Real time control variables regulate and control the components such as motor-driven valve and pump, to guarantee the even running of technique.Main body biochemical treatment work The PLC control system schematic block diagram of skill, the PLC On-line Control flow chart of the anaerobic reaction of main body biochemical processing process, main body are raw Change the PLC On-line Control flow chart of the short distance nitration reaction for the treatment of process and the Anammox of main body biochemical processing process The PLC On-line Control flow chart of reaction is respectively as shown in Fig. 2 to Fig. 5.
Through the above steps, the present invention may generate secondary pollution in implementation process, including Anaerobic Treatment process produces Raw biogas, the excess sludge of system generation and the ozone of advanced treating remnants;As stated above, natural pond anaerobism generated Gas is delivered to biogas storage tank F1, after purification, burning processing, for heating the short distance nitration processing, Anammox processing list Member, after-heat can be used for generating electricity, it is possible to provide full factory uses electricity, realizes power self-support;The collecting-tank I 4, anaerobism The excess sludge that EGSB reactor 5 and advanced treatment system generate is pumped into sludge concentration tank F2, carries out by centrifugal dehydrator F3 After solidification, filtrate is back to the adsorption tank 2, and solidification sludge transports outward landfill disposal or burning disposal;The advanced treating is remaining Ozone gas, through collection after enter ozone tail gas decomposer F4, discharged after being catalytically decomposed.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although above-described embodiment to the present invention into Gone detailed description, the related technical personnel of this field it is understood that can modify to the present invention or replace on an equal basis, but Any modification and part replacement for not departing from spirit and scope of the invention should all be covered in scope of the presently claimed invention.

Claims (4)

1. a kind of group technology of landfill leachate treatment, which comprises the steps of:
(1) landfill leachate is pre-processed through adsorption tank, coagulating basin;
(2) it after the water outlet of coagulating basin is mixed with the phegma of anaerobic ammonia oxidation reactor, is carried out in anaerobism EGSB reactor same Walk the reaction of denitrification methane phaseization;
(3) Anaerobic Treatment water outlet 55%-60% enters A/O short distance nitration reaction tank, and remainder enters collecting-tank II;
(4) water outlet of A/O short distance nitration is with the anaerobism liquid in collecting-tank II after 1:1 is mixed by volume, in UASB Anammox Denitrification reaction is carried out in reactor;
(5) water outlet of anaerobic ammonia oxidation reactor enters zero concentrate advanced treatment system, successively by two-stage coagulation processing, one After grade homogeneous catalysis ozone Oxidation Treatment, bis- biological treatments of MBR, second level homogeneous catalysis ozone Oxidation Treatment, qualified discharge;
Catalyst used in the level-one homogeneous catalysis ozone Oxidation Treatment, second level homogeneous catalysis ozone Oxidation Treatment is liquid Catalyst, wherein containing Mn2+、Ag+Transition metal ions.
2. the group technology of landfill leachate treatment according to claim 1, which is characterized in that PLC control system is to institute State Anaerobic Treatment, short distance nitration processing, Anammox processing progress real-time control:
First liquid flow sensor is installed on reflux line before the anaerobism EGSB reactor, is equipped with first in the middle part of reactor The water inlet of temperature sensor, fluid current meter, the first pH electrode, A/O short distance nitration reaction tank is passed equipped with second liquid flow Sensor is equipped with second temperature sensor, DO electrode, the 2nd pH electrode, the first ammonia nitrogen in the aerobic zone of A/O short distance nitration pond Electrode, aerated conduit are equipped with gas flow sensor;Before the anaerobic ammonia oxidation reactor connection collecting-tank II into Waterpipe is equipped with third liquid flow sensor, and third temperature sensing is equipped in the UASB anaerobic ammonia oxidation reactor Device, the 3rd pH electrode, ORP electrode, the 2nd NH4 +N electrode, NO2 -N electrode;Above-mentioned each on-line computing model is controlled with PLC respectively System connection;
Collected signal is shown in man-machine interface by the PLC control system, is calculated in real time according to operation program Variable is controlled, real-time monitoring is carried out to the pump, heating device, aerator, the motor-driven valve that are connected with PLC control system.
3. the group technology of landfill leachate treatment according to claim 1, which is characterized in that the Anaerobic Treatment generates Biogas be delivered to biogas storage tank, after purification, burning, for heating short distance nitration processing, Anammox processing unit, After-heat is for generating electricity.
4. the group technology of landfill leachate treatment according to claim 1, which is characterized in that produced in the advanced treating Raw ozone tail gas discharges after entering the processing of ozone tail gas decomposer after collection.
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CN109836010B (en) * 2017-11-27 2022-03-01 中国石油天然气集团公司 Partial nitrosation-anaerobic ammonia oxidation denitrification device and treatment method thereof
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CN112209560A (en) * 2019-07-11 2021-01-12 中国科学院城市环境研究所 Combined process treatment method of landfill leachate
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