CN105776775A - Anaerobic-autotrophic nitrogen removal-ozone oxidation coupling landfill leachate whole flow process zero emission processing process - Google Patents

Anaerobic-autotrophic nitrogen removal-ozone oxidation coupling landfill leachate whole flow process zero emission processing process Download PDF

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CN105776775A
CN105776775A CN201610315903.8A CN201610315903A CN105776775A CN 105776775 A CN105776775 A CN 105776775A CN 201610315903 A CN201610315903 A CN 201610315903A CN 105776775 A CN105776775 A CN 105776775A
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treatment
anaerobic
landfill leachate
tank
reactor
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CN105776775B (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 invention provides a landfill leachate processing process. Landfill leachate sequentially passes through a pretreatment system, a main body biological treatment system and a deep treatment system; the pretreatment system consists of a regulating pool, an adsorption pool and a coagulating pool; wastewater is pretreated sequentially through the devices; outlet water enters the main body biological treatment system; the main body biological treatment system comprises an anaerobic EGSB (expanded granular sludge bed) reactor, an A/O short-range nitratlon reaction pool and an anaerobic ammonia oxidation UASB (upflow anaerobic sludge blanket) reactor; the treatment devices perform real-time regulation control through a PLC (programmable logic controller) control system for denitrification decarbonization reaction; the outlet water enters the deep treatment system for further treatment; the deep treatment system comprises a secondary coagulating pool, a primary homogeneous catalysis ozone oxidation reaction pool, a MBR (meane biological reactor) secondary biological reaction pool and a secondary homogeneous catalysis ozone oxidation reaction pool; finally, organic matters, total nitrogen and ammonia nitrogen of the outlet water reach the discharge standard. The landfill leachate processing process has the advantages that efficient denitrification and carbon removal are realized; the energy is saved; the consumption is reduced; the operation is stable; meanwhile, the goal of zero concentrated liquid generation is realized.

Description

The percolate whole process Zero-discharge treating process of anaerobism-autotrophic denitrification-ozone oxidation coupling
Technical field
The present invention relates to environmental protection technical field, be specifically related to the group technology of a kind of landfill leachate treatment.
Background technology
Containing a large amount of organic pollutions, nitrogen substance and miscellaneous heavy metal substance in the percolate that municipal refuse sanitary landfills produces, if dealt with improperly, grave danger of surrounding can be become.Especially ammonia nitrogen contained therein, is the key factor of percolate stabilizing treatment;And too high ammonia nitrogen concentration can suppress the normal growth of microorganism and the effect of biochemical treatment." percolate discharge standard " (GB16889-2008) that country promulgates, adds always nitrogen discharged standard, it is desirable to the total nitrogen concentration of water outlet is less than 40mg/L, and so far, it is still a great problem in landfill leachate treatment.At present, the process of percolate generally adopts the process combination of " pretreatment+biological treatment+advanced treating ".Advanced treatment process comparatively ripe on landfill leachate treatment market is the membrane process such as ultrafiltration, nanofiltration, although the supernatant after nanofiltration processes is up to standard, can directly discharge, but the concentrated solution colourity produced after nanofiltration separation is deep, salinity is high, COD is mainly the humic acid material of difficult degradation, it is difficult to process, often take back spray, recharge landfill or the mode such as outward transport process is disposed, be easily formed secondary pollution.This part accounts for the 40% of total process water yield, and process energy consumption is big, runs and investment cost is high, so the process of concentrated solution is the another hang-up in landfill leachate treatment process.Generally speaking, there is complex treatment process in traditional handicraft, chemical consumption amount is big, cost is high, process after percolate always nitrogen discharged not up to standard, concentrated solution process the defects such as not up to standard.
Short distance nitration-anaerobic ammoxidation tandem process is one of technique most economical, the most succinct in current wastewater biological denitrificaion field.Short distance nitration technology, is control biological nitrification process, in the ammoxidation stage, to make NH4 +-N is being converted into NO2 -NO no longer it is changed into after-N3 --N;Anammox technology is by NH4 +-N and NO2 --N is converted into the bioreaction technology of nitrogen.Short distance nitration-anaerobic ammoxidation group technology then combines the advantage of two kinds of technology, and for tradition denitrification process, this technique has that oxygen consumption is low, few without organic carbon source, surplus sludge volume, nitric efficiency advantages of higher.
Additionally, the strong oxidation of ozone, the hardly degraded organic substance in percolate can being degraded to the Organic substance of easily biological-degradable, improve its biodegradability, the two stage biological subsequently through MBR technique processes and ozone deep oxidation, makes outlet water organic substance qualified discharge.Realize the purpose of decolouring, deodorization simultaneously.Ozone strong oxidizing further treatment technique, it may be achieved the purpose of percolate " zero concentrated solution ", thoroughly solves the problem that in traditional handicraft, concentrated solution difficulty is put, cost of disposal is high.
Therefore, how both the above technology is applied in the process of percolate and just becomes one of study hotspot.
Summary of the invention
It is an object of the invention to provide the group technology of a kind of landfill leachate treatment, organically combined by anaerobic technology, autotrophic denitrification technology and ozone high grade oxidation technology, learn from other's strong points to offset one's weaknesses, thus having the advantages such as high ammonia nitrogen removal frank, high chroma clearance, high COD clearance, stable, change of water quality is adaptable, expense is relatively low, zero concentrated solution generation.
To achieve these goals, the technical solution used in the present invention is as follows:
The group technology of a kind of landfill leachate treatment, comprises the steps:
(1) percolate carries out pretreatment through adsorption tank, coagulating basin;
(2), after the water outlet of coagulating basin mixes with the backflow of anaerobic ammonia oxidation reactor, anaerobism EGSB reactor carries out simultaneous denitrification and methanogenesis reaction;
(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 and the anaerobism liquid in collecting-tank II are after 1:1 mixes by volume, carry out denitrification reaction in UASB anaerobic ammonia oxidation reactor;
(5) water outlet of anaerobic ammonia oxidation reactor enters zero concentrated solution advanced treatment system, after sequentially passing through two-stage coagulation process, one-level homogeneous catalysis ozone Oxidation Treatment, MBR bis-biological treatments, two grades of homogeneous catalysis ozone Oxidation Treatment, and qualified discharge.
According to above scheme, described anaerobic treatment, short distance nitration process, Anammox are processed and carry out controlling in real time by described PLC control system:
Before described anaerobism EGSB reactor, reflux line is provided with first liquid flow transducer, the first temperature sensor, fluid speed meter, the first pH electrode it is provided with in the middle part of reactor, the water inlet of A/O short distance nitration reaction tank is provided with second liquid flow transducer, aerobic zone, described A/O short distance nitration pond is provided with the second temperature sensor, DO electrode, the second pH electrode, the first ammonia nitrogen electrode, aerated conduit sets gas flow sensor;The inlet channel connecting collecting-tank II before described anaerobic ammonia oxidation reactor is provided with the 3rd liquid flow sensor, in described UASB anaerobic ammonia oxidation reactor, is provided with three-temperature sensor, the 3rd pH electrode, ORP electrode, the 2nd NH4 +-N electrode, NO2 --N electrode;Above-mentioned each on-line computing model is connected with PLC control system respectively;
The signal collected is shown in man machine interface by described PLC control system, obtains real time control variables according to running program computation, the pump being connected with PLC control system, heater, aerator, electrodynamic valve are carried out real-time monitoring.
According to above scheme, the biogas that described anaerobic treatment produces is delivered to biogas storage tank, after purification, and burning, it is used for heating the process of described short distance nitration, Anammox processing unit, after-heat is used for generating electricity, it is provided that full factory makes power consumption, it is achieved power self-support.
According to above scheme, described advanced treating is the group technology of bis-biological treatments of MBR and ozone Oxidation Treatment, including two-stage coagulation process, one-level homogeneous catalysis ozone Oxidation Treatment, MBR bis-biological treatments, two grades of homogeneous catalysis ozone Oxidation Treatment, really realize zero concentration liquor treating process.
According to above scheme, the catalyst that described first homogeneous catalysis ozone Oxidation Treatment uses is liquid catalyst, wherein contains Mn2+、Ag+Deng transition metal ions.
According to above scheme, the ozone tail gas produced in described advanced treating, after collection, enter discharge after ozone tail gas decomposer processes.
Each technological principle of the present invention is as follows:
A. absorption and coagulation:
Percolate enters adsorption tank after initially entering regulating reservoir regulating water quality, the balanced water yield, adsorption tank adds a certain amount of adsorbent, after reacting completely, water outlet enters in coagulating basin, coagulant and flocculation aid-effect under, carrying out coagulating, adsorption tank is sent in sludge concentration tank with pipeline through pump with the precipitate in coagulating basin.
B. anaerobic treatment (simultaneous denitrification and methanogenesisization process):
After percolate after absorption and coagulation processes mixes with the backflow of Anammox reaction tank, enter anaerobic reation pool, control pH at 7-8, temperature is 30-35 DEG C, after mixed liquor contacts with base sludge, first carries out denitrification, the volatile fatty acids such as acetic acid can as denitrifying organic carbon source, remove the nitrate nitrogen in Anammox backflow, improve the nitrogen removal rate of system, produce substantial amounts of basicity simultaneously;Then it is small organic molecule by the larger molecular organics hydrolysis acidification in percolate under acid-producing bacteria effect in expanded granular sludge, is then passed through anaerobe, the absorption of oxygen bacterium of holding concurrently, fermentation, methanogenic combined effect are broken down into methane or carbon dioxide;The liquid carrying biogas rises to top after three phase separator, and mud drops back into reaction zone, and biogas is delivered in biogas storage tank, and water section carries out internal reflux, flows out partly as water outlet.
C. short distance nitration:
Percolate after simultaneous denitrification and methanogenesis processes is partially into the anoxic zone of A/O short distance nitration reaction tank, aerobic zone is flowed into after further organics removal, in control aerobic zone, pH is at 7.5-8.0, temperature is 25-30 DEG C, subsequent start-up aeration and stirring system, the DO maintained in course of reaction is about 2.0mg/L, nitrifying process is made to stop at the nitrite stage, according to the ammonia nitrogen concentration in online ammonia nitrogen electrode monitor in real time reaction tank, and adjust influent ammonia nitrogen loading in time by PLC system, make the average FA (free ammonia) in reaction tank lower than 10mg/L, suppressed by FA and control the cultured water cumulative percentage making short distance nitration realize more than 95% in real time.
D. Anammox:
Percolate after short distance nitration processes enters Anammox UASB reactor, after mixing by a certain percentage with the anaerobic treatment liquid in collecting-tank II, by the online NO being arranged on water inlet2 --N electrode, NH4 +-N electrode is monitored in real time, makes into water NO2 --N/NH4 +-N=1.32, running temperature controls at 35 DEG C, and upflow velocity is 1-2m/h, reacts under the effect of anaerobic ammonium oxidation granular sludge, can make NO2 --N、NH4 +The clearance of-N reaches more than 90%, and the three phase separator at reacted device top carries out mud-water separation.
E. advanced treating:
The water outlet of Anammox reaction tank enters zero concentrated solution advanced treatment system, including two-stage coagulation pond, the first homogeneous catalysis ozone oxidation reaction pond, MBR film reaction pond, the second ozone oxidation reaction pond.The water outlet of anaerobic ammonia oxidation reactor enters flocculation sedimentation tank, the hardly degraded organic substance of part macromole, metal ion is made to remove with precipitated form under the effect of coagulant and flocculant, after precipitation, supernatant enters one-level homogeneous catalysis ozone oxidation reaction pond, under liquid catalyst effect, utilize the strong oxidizing property of ozone, make the hardly degraded organic substance in percolate be degraded to the Organic substance of easily biological-degradable, improve its biodegradability;Water outlet enters MBR film reaction pond, designs immersion MBR membrane treatment appts, carry out nitrification and denitrification reaction in MBR reaction tank, the pollutant such as further organics removal, ammonia nitrogen, its internal or external membrane module, carries out solid-liquid separation efficiently, reduces pollutant concentration in water outlet;Water outlet enters two grades of homogeneous catalysis ozone oxidation reaction ponds, a small amount of biorefractory organic of residual in degrading waste water, has the effects such as decolouring, deodorization simultaneously, makes water outlet stably reaching standard.
The invention has the beneficial effects as follows:
1) main body bioprocess technology of the present invention adopts " anaerobism EGSB reactor+A/O short distance nitration reaction tank+UASB anaerobic ammonia oxidation reactor " to process technique, fully efficiently remove the advantage of COD, A/O pond accumulation nitrite, Anammox removal total nitrogen in conjunction with anaerobism EGSB, make the present invention have and do not need the advantages such as additional carbon, aeration energy consumption are low, nitric efficiency is high, system run all right, excess sludge production are few;
2) advanced treatment process of the present invention adopts " flocculation sedimentation tank++ two grades of homogeneous catalysis ozone oxidation reaction ponds of+MBR reaction tank, one-level homogeneous catalysis ozone oxidation reaction pond " technique, zero concentrated solution discharge is fully achieved, solves the tradition film such as nanofiltration, reverse osmosis and process unavoidable concentrated solution difficulty handling problems;
3) biogas that the system for anaerobic treatment of the present invention produces is delivered to biogas storage tank, after purification, and burning, it is used for heating the process of described short distance nitration, Anammox processing unit, after-heat is used for generating electricity, it is provided that full factory makes power consumption, it is achieved power self-support;
4) present invention adopts PLC control system, it may be achieved the service condition of main body bioprocess technology is controlled in real time, it is ensured that process the stable operation of technique;
5), in the first, second O3 catalytic oxidation reaction tank of the present invention, liquid catalyst (Mn is added2+、Ag+) promote ozone decomposition reaction in water, produce more living radical, the clearance being significantly increased in percolate COD, and the ozone dosage consumed greatly reduces;
6) ozone tail gas that the ozone advanced treating of the present invention produces, enters discharge after ozone tail gas decomposer processes, it is to avoid to environmental danger after collection.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the present invention;
Fig. 2 is the PLC control system schematic block diagram of the main body biochemical processing process of the present invention;
Fig. 3 is the PLC On-line Control flow chart of the anaerobic reaction of the main body biochemical processing process of the present invention;
Fig. 4 is the PLC On-line Control flow chart of the short distance nitration reaction of the main body biochemical processing process of the present invention;
Fig. 5 is the PLC On-line Control flow chart of the Anammox reaction of the main body biochemical processing process of the present invention.
In figure: 1, regulating reservoir;2, adsorption tank;3, coagulating basin;4, collecting-tank I;5, anaerobism EGSB reactor;6, A/O short distance nitration reaction tank;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.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, technical scheme is illustrated.
The present invention provides the group technology (see Fig. 1 to Fig. 5) of a kind of landfill leachate treatment, comprises the following specific steps that:
1) absorption and coagulation pretreatment:
nullPercolate initially enters regulating reservoir 1 regulating water quality、Adsorption tank 2 is entered after the balanced water yield,Adsorption tank adds a certain amount of adsorbent (adsorbent that flyash etc. are cheap),Open mixing plant,It is adjusted to Rational Rotation Speed,Carry out adsorption treatment,After reacting completely,Stop stirring,Stand,Adsorption tank water outlet enters in coagulating basin 3,Described coagulating basin 3 adds a certain amount of coagulant (the contour poly-coagulant of bodied ferric sulfate) and flocculation aid PAM,Regulate pH to 7.5-8.5 (pH regulator adopts Calx) to regulate mixing plant to Rational Rotation Speed,Carry out coagulating treatment,After stirring reaction certain time,Static,Open the water outlet of described coagulating basin 3,Described adsorption tank 2 is sent in sludge concentration tank with pipeline through pump with the precipitate in coagulating basin 3,Major part suspended state Organic substance and float can be removed by absorption and coagulation pretreatment,Reduce heavy metal concentration,Improve biodegradability;
2) anaerobic treatment (simultaneous denitrification and methanogenesis process):
The backflow of percolate and UASB anaerobic ammonia oxidation reactor 8 after absorption and coagulation processes is after collecting-tank I4 mixes, enter the water distribution area of anaerobism EGSB reactor 5, alkali liquid tank is connected with water inlet by the alkali liquor pipe with dosing pump, basicity is supplemented in time by PLC system regulation and control, in control reactor, pH is at 7-8, reactor is externally provided with water-bath interlayer, maintain temperature at 30-35 DEG C, upflow velocity is 1-6m/h, after mixed liquor contacts with base sludge, first denitrification is carried out, the volatile fatty acids such as acetic acid can as denitrifying organic carbon source, remove the nitrate nitrogen in Anammox backflow, improve the nitrogen removal rate of system, produce substantial amounts of basicity simultaneously;Then it is small organic molecule by the larger molecular organics hydrolysis acidification in percolate under acid-producing bacteria effect in expanded granular sludge, is then passed through anaerobe, the absorption of oxygen bacterium of holding concurrently, fermentation, methanogenic combined effect are broken down into methane or carbon dioxide;The liquid carrying biogas rises to top after three phase separator, mud drops back into reaction zone, biogas is delivered in biogas storage tank F1, water section enters the internal reflux outlet on anaerobism EGSB sidewall, internal reflux is carried out through the internal reflux pipe with internal reflux pump, another part flows out as water outlet, and 40-45% water outlet enters in collecting-tank II 6;
3) short distance nitration processes:
Percolate 55-60% after simultaneous denitrification and methanogenesis processes enters the anoxic zone of A/O short distance nitration reaction tank 6, aerobic zone is entered after further organics removal, in control aerobic zone, pH is at 7.5-8.0, temperature is 25-30 DEG C, then turn on mixing plant, start by aeration head, aerator, the aerating system of gas flow sensor and air control valve composition, the DO maintained in course of reaction is about 2mg/L, according to the ammonia nitrogen concentration in online ammonia nitrogen electrode monitor in real time reaction tank, and regulate and control influent ammonia nitrogen loading by PLC system, make the average FA in reaction tank lower than 10mg/L, suppressed by FA and control the cultured water cumulative percentage making short distance nitration realize more than 95% in real time, water outlet pumps in described UASB anaerobic ammonia oxidation reactor 8;
4) Anammox processes:
Percolate after described short distance nitration processes enters described UASB anaerobic ammonia oxidation reactor 8, mixes with the anaerobic treatment liquid 1:1 by volume in described collecting-tank II7, by the online NO being arranged on water inlet2 --N electrode, NH4 +-N electrode is monitored in real time, makes into water NO2 --N/NH4 +-N=1.32, works as NO2 --N/NH4 +During-N > 1.32, controlled by PLC system suitably to increase the flow entering described UASB anaerobic ammonia oxidation reactor 8 from described collecting-tank II7, on the contrary, work as NO2 --N/NH4 +< when 1.32, suitably reducing the flow entering anaerobic ammonia oxidation reactor from described collecting-tank II7, running temperature controls at 35 DEG C-N, and upflow velocity is that 1-2m/h, ORP range for-200mV-50mV, reacts, can make NO under the effect of anaerobic ammonia oxidizing bacteria2 --N、NH4 +The clearance of-N reaches more than 90%, and the three phase separator at reacted device top carries out mud-water separation;
5) advanced treating:
The water outlet of anaerobic ammonia oxidation reactor enters zero concentrated solution advanced treatment system, including coagulative precipitation tank 9, one-level homogeneous catalysis ozone oxidation reaction pond 10, MBR film reaction pond 11, two grades of homogeneous catalysis ozone oxidation reaction ponds 12, the water outlet of described UASB anaerobic ammonia oxidation reactor 8 enters described coagulative precipitation tank 9, at coagulant (aluminium polychlorid, 50-1000mg/L) with flocculant (PAM, under effect 5-20mg/L), make the hardly degraded organic substance of part macromole, metal ion is removed with precipitated form, reduce the COD concentration in percolate and eliminate toxicity, the form adopting sloping plate deposition precipitates, supernatant enters described one-level homogeneous catalysis ozone oxidation reaction pond 10, (it is generally metal transfer ion at liquid catalyst, Mn2+、Ag+Deng) effect under, utilize the strong oxidizing property of ozone, make the hardly degraded organic substance in percolate be degraded to the Organic substance of easily biological-degradable, improve its biodegradability;Water outlet enters described MBR film reaction pond 11, adopts immersion MBR membrane treatment appts, carry out nitrification and denitrification reaction, remove COD, BOD, ammonia nitrogen etc., its internal or external membrane module further, carry out solid-liquid separation efficiently in described MBR film reaction pond 11;Water outlet enters described two grades of homogeneous catalysis ozone oxidation reaction ponds 12, the a small amount of difficult biochemical COD of residual in degrading waste water, there is the effects such as decolouring, deodorization simultaneously, make water outlet stably reach " household refuse landfill sites Environmental capacity standard " (GB16889-2008) discharge standard.
Further, before described anaerobism EGSB reactor 5, reflux line is provided with first liquid flow transducer, the first temperature sensor, fluid speed meter, the first pH electrode it is provided with in the middle part of reactor, it is provided with second liquid flow transducer before the water inlet of A/O short distance nitration reaction tank, described A/O short distance nitration reaction tank 6 aerobic zone is provided with the second temperature sensor, DO electrode, the second pH electrode, the first ammonia nitrogen electrode, aerated conduit sets gas flow sensor;The inlet channel connecting collecting-tank II before described UASB anaerobic ammonia oxidation reactor 8 is provided with the 3rd liquid flow sensor, in described UASB anaerobic ammonia oxidation reactor 8, is provided with three-temperature sensor, the 3rd pH electrode, ORP electrode, the 2nd NH4 +-N electrode, NO2 --N electrode;The signal detected is passed to PLC control system by said apparatus, and is shown in man machine interface, obtaining real time control variables according to running program computation, the parts such as electrodynamic valve and pump being regulated and controled, thus ensureing the even running of technique.The PLC control system schematic block diagram of main body biochemical processing process, the PLC On-line Control flow chart of anaerobic reaction of main body biochemical processing process, main body biochemical processing process short distance nitration reaction PLC On-line Control flow chart and main body biochemical processing process Anammox reaction PLC On-line Control flow chart see respectively shown in Fig. 2 to Fig. 5.
By above-mentioned steps, the present invention may produce secondary pollution in implementation process, excess sludge that the biogas that produces including anaerobic treatment process, system produce and the remaining ozone of advanced treating;As stated above, the biogas that anaerobism produces is delivered to biogas storage tank F1, after purification, burn processing, it is used for heating the process of described short distance nitration, Anammox processing unit, after-heat can be used for generating electricity, it is possible to provide full factory makes power consumption, it is achieved power self-support;The excess sludge that described collecting-tank I4, anaerobism EGSB reactor 5 and advanced treatment system produce pumps into sludge concentration tank F2, after centrifugal dehydrator F3 solidifies, filtrate is back to described adsorption tank 2, solidification sludge outward transport landfill disposal or burning disposal;The ozone gas that described advanced treating is remaining, enters ozone tail gas decomposer F4 after collecting, discharges after catalyzed decomposition.
Above example is only in order to illustrative not limiting technical scheme, although the present invention has been described in detail by above-described embodiment, the person skilled of this area is it is understood that can modify to the present invention or replace on an equal basis, but any amendment and local without departing from spirit and scope of the invention is replaced and all should be encompassed in scope of the presently claimed invention.

Claims (6)

1. the group technology of a landfill leachate treatment, it is characterised in that comprise the steps:
(1) percolate carries out pretreatment through adsorption tank, coagulating basin;
(2), after the water outlet of coagulating basin mixes with the backflow of anaerobic ammonia oxidation reactor, anaerobism EGSB reactor carries out simultaneous denitrification and methanogenesis reaction;
(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 and the anaerobism liquid in collecting-tank II are after 1:1 mixes by volume, carry out denitrification reaction in UASB anaerobic ammonia oxidation reactor;
(5) water outlet of anaerobic ammonia oxidation reactor enters zero concentrated solution advanced treatment system, after sequentially passing through two-stage coagulation process, one-level homogeneous catalysis ozone Oxidation Treatment, MBR bis-biological treatments, two grades of homogeneous catalysis ozone Oxidation Treatment, and qualified discharge.
2. the group technology of landfill leachate treatment according to claim 1, it is characterised in that described anaerobic treatment, short distance nitration process, Anammox are processed and carry out controlling in real time by described PLC control system:
Before described anaerobism EGSB reactor, reflux line is provided with first liquid flow transducer, the first temperature sensor, fluid speed meter, the first pH electrode it is provided with in the middle part of reactor, the water inlet of A/O short distance nitration reaction tank is provided with second liquid flow transducer, being provided with the second temperature sensor, DO electrode, the second pH electrode, the first ammonia nitrogen electrode in aerobic zone, described A/O short distance nitration pond, aerated conduit is provided with gas flow sensor;The inlet channel connecting collecting-tank II before described anaerobic ammonia oxidation reactor is provided with the 3rd liquid flow sensor, in described UASB anaerobic ammonia oxidation reactor, is provided with three-temperature sensor, the 3rd pH electrode, ORP electrode, the 2nd NH4 +-N electrode, NO2 --N electrode;Above-mentioned each on-line computing model is connected with PLC control system respectively;
The signal collected is shown in man machine interface by described PLC control system, obtains real time control variables according to running program computation, the pump being connected with PLC control system, heater, aerator, electrodynamic valve are carried out real-time monitoring.
3. the group technology of landfill leachate treatment according to claim 1, it is characterised in that the biogas that described anaerobic treatment produces is delivered to biogas storage tank, after purification, burning, is used for heating the process of described short distance nitration, Anammox processing unit, and after-heat is used for generating electricity.
4. the group technology of landfill leachate treatment according to claim 1, it is characterized in that, described advanced treating is the group technology of bis-biological treatments of MBR and ozone Oxidation Treatment, including flocculation sediment process, one-level homogeneous catalysis ozone Oxidation Treatment, MBR bis-biological treatments, two grades of homogeneous catalysis ozone Oxidation Treatment, really realize zero concentrated solution advanced treatment process.
5. the group technology of landfill leachate treatment according to claim 1, it is characterised in that the catalyst that described first, second homogeneous catalysis ozone Oxidation Treatment uses is liquid catalyst, wherein contains Mn2+、Ag+Deng transition metal ions.
6. the group technology of landfill leachate treatment according to claim 1, it is characterised in that the ozone tail gas produced in described advanced treating, enters discharge after ozone tail gas decomposer processes after collection.
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CN109836010A (en) * 2017-11-27 2019-06-04 中国石油天然气集团公司 A kind of partial nitrification-Anammox nitrogen rejection facility and its processing method

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CN104860482A (en) * 2015-05-25 2015-08-26 北京石油化工学院 Advanced nitrogen removal method for treating late landfill leachate with upflow anaerobic sludge blanket, anoxic/oxic and anaerobic ammonia oxidation reactor combined process

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CN103539319A (en) * 2013-10-31 2014-01-29 华北电力大学 Garbage leachate treating device
CN104386883A (en) * 2014-12-03 2015-03-04 上海世渊环保科技有限公司 Landfill leachate zero concentrated solution deep treatment system and method
CN104860482A (en) * 2015-05-25 2015-08-26 北京石油化工学院 Advanced nitrogen removal method for treating late landfill leachate with upflow anaerobic sludge blanket, anoxic/oxic and anaerobic ammonia oxidation reactor combined process

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CN109836010A (en) * 2017-11-27 2019-06-04 中国石油天然气集团公司 A kind of partial nitrification-Anammox nitrogen rejection facility and its processing method
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