CN110526401A - A kind of landfill leachate short-cut nitrification and denitrification biological denitrification method - Google Patents
A kind of landfill leachate short-cut nitrification and denitrification biological denitrification method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000000149 chemical water pollutant Substances 0.000 title claims abstract description 22
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- 238000010992 reflux Methods 0.000 claims abstract description 35
- 239000001301 oxygen Substances 0.000 claims abstract description 30
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 30
- 230000009935 nitrosation Effects 0.000 claims abstract description 29
- 238000007034 nitrosation reaction Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 18
- 239000010802 sludge Substances 0.000 claims description 32
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- 238000004062 sedimentation Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 9
- 239000002351 wastewater Substances 0.000 claims description 7
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- 238000003672 processing method Methods 0.000 claims description 6
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- 238000005276 aerator Methods 0.000 claims description 5
- 239000010813 municipal solid waste Substances 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000010425 asbestos Substances 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 3
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- 239000000463 material Substances 0.000 claims description 3
- 229910052895 riebeckite Inorganic materials 0.000 claims description 3
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- 238000003756 stirring Methods 0.000 claims description 3
- 210000000476 body water Anatomy 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 10
- 229910052799 carbon Inorganic materials 0.000 abstract description 10
- 238000006396 nitration reaction Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 5
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- 241001453382 Nitrosomonadales Species 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
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- 238000005516 engineering process Methods 0.000 description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous oxide Inorganic materials [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
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- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/02—Temperature
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
Abstract
The invention discloses a kind of landfill leachate short-cut nitrification and denitrification biological denitrification methods, belong to landfill leachate treatment field.The present invention passes through DO concentration, addition chemical inhibitor KClO inside limited reactions device using the difference of AOB and NOB oxygen saturation constant by the aerobic short distance nitration reactor of the micro- oxygen-of anaerobism-3The accumulation that other conditions obtain nitrite such as carry out fast enriching AOB, while controlling temperature, basicity, the area Wei Yang nitrosoation rate reaches 90% or more.NO using landfill leachate anaerobic effluent as water inlet, using Prepositive denitrification, in the reflux of nitrosation liquid2 ‑- N can make full use of into the carbon source in water and carry out denitrification, and system water outlet COD removal rate is maintained at 80% or so, NH after stablizing4 +- N removal rate is maintained at 98% or more；And the method for the invention process runs well, system adjust in time after being impacted by certain load, system decontamination ability can quickly be restored.
Description
Technical field
The present invention relates to a kind of landfill leachate short-cut nitrification and denitrification biological denitrification methods, belong to landfill leachate treatment
Field.
Background technique
During taking sanitary landfills to handle municipal refuse, organic matter is decomposed by the microorganisms generation moisture, in addition rainwater,
The infiltration of table water and underground water and generate landfill leachate.Landfill leachate complicated component contains a large amount of organic matter, poisonous and harmful
Object and heavy metal etc., if it is improper conduct oneself well to comprehend surrounding enviroment are generated with certain influence.Anaerobic bio-treated is that rubbish seeps at this stage
The main means of filtrate processing, have many advantages, such as that process stabilizing, operating cost are low, land occupation is few.Water outlet has height after Anaerobic Treatment
COD (COD), high ammonia nitrogen (NH4+-N), low C/N characteristic, carrying out denitrogenation using traditional nitration denitrification mode need to consume greatly
Therefore the energy and carbon source of amount realize that the denitrogenation of landfill leachate efficient low-consume becomes hot spot using short-cut nitrification and denitrification technique.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of processing of landfill leachate anaerobic effluent deep biological denitrogenation
Method.Short-cut nitrification and denitrification is controlled by condition inhibits nitrite oxidizing bacteria in system (NOB) activity, improves ammonia
Oxidizing bacteria (AOB) activity, to controlling nitrifying process in NO2 -- N the stage, then under anoxic or anaerobic condition directly into
Row denitrification.It is more to influence AOB and NOB factor, such as dissolved oxygen (DO), pH value, water inlet C/N, free ammonia (FA) concentration, temperature
(T), sludge age (SRT), ultrasound and chemical inhibitor etc..Compared to traditional nitration denitrification, short-cut nitrification and denitrification is omitted
“NO2 --N→NO3 --N→NO2 -- N " process saves about 25% oxygen demand and 40% organic carbon source, for high NH4 +-N、
Low C/N waste water application value with higher.Often using AOB and NOB to adaptive capacity to environment difference, control system in research work
DO concentration or FA concentration can realize NO in system2 -- N accumulation, but in actual waste water treatment process, water-quality constituents is complicated, influence because
Element is more, and single certain impact factor of control is difficult to that system is maintained to stablize, and needs to add chlorate, hypochlorite, azanol etc.
Chemical inhibitor fast implements NO2 -- N accumulation.The present invention is anti-based on short distance nitration using the micro- oxygen of anaerobism-- aerobic nitrogen removal reactor
Nitrification technology is discharged landfill leachate after anaerobic digestion carries out biological denitrificaion, after analogue reactor is impacted by short term
Its resistance to overload shock ability and recovery situation make reactor water outlet meet " sewage is discharged into town sewer water standard " (GB/
T31962-2015 requirement).
The first purpose of the invention is to provide a kind of micro- oxygen of anaerobism-- aerobic biological denitrification reactor, including intake pool,
Reactor body, sedimentation basin and PLC control system；The intake pool is connected by the water inlet of intake pump and reactor body
It connects；4 regions are divided into partition inside the reactor body, are followed successively by anaerobic zone, Wei Yangqu, transition region and aerobic zone；Institute
It states partition bottom to connect with reactor body bottom, certain distance is reserved at the top of top and reactor body；In the anaerobic zone
Portion is equipped with blender；PH on-line determination instrument, on-line temperature monitoring instrument, the area Wei Yang DO on-line computing model are equipped with inside the area Wei Yang
With the area Wei Yang air pump；The transition region bottom is connect by nitrosation liquid reflux pump with intake pump；It is set inside the aerobic zone
There are aerobic zone DO on-line computing model and aerobic zone air pump；The reactor body is connect by water outlet with sedimentation basin；It is described
Precipitating bottom of pond portion is connect by sludge reflux pump with intake pump；The intake pump, blender, pH on-line determination instrument, temperature online
Monitor, the area Wei Yang DO on-line computing model, the area Wei Yang air pump, aerobic zone DO on-line computing model, aerobic zone air pump, nitrosation
Liquid reflux pump and the equal of sludge reflux pump are connect with PLC control system.
In one embodiment of the invention, a baffling is equipped with inside the area Wei Yang, transition region and aerobic zone
Plate, the baffle plate are connect with reactor head, and bottom and reactor bottom reserve certain distance；The purpose being arranged in this way is to increase
Add water flow to be displaced, increases hydraulic detention time.
In one embodiment of the invention, heating device, the heating device is arranged in the reactor body side wall
It is connect with PLC control system.
In one embodiment of the invention, the agitating device is accurate blender.
In one embodiment of the invention, the PLC control system is also connect with remote monitoring system, and by having
Gauze network and remote monitoring system exchange data information and control information；What the control program in the PLC control system used
It is Wuxi Ma Sheng environmental energy Science and Technology Ltd. MA-101 type process control programmable controller.
In one embodiment of the invention, the inlet and outlet are located at reactor body two sides, it is described into
The bottom of reactor body side is arranged in the mouth of a river；The water outlet is set to the top of the reactor body other side.
In one embodiment of the invention, denitrification reactor main body is equipped with aeration dress in the area Wei Yang and aerobic zone bottom
It sets, air inlet is connect by pipeline with air pump, and gas flowmeter is arranged between air inlet and air pump.
In one embodiment of the invention, the reactor body is made of stainless steel material.
In one embodiment of the invention, the heating device is silica gel heating band；On the outside of the silica gel heating band
Also set up asbestos layer.
A second object of the present invention is to provide a kind of application of above-mentioned apparatus in sewage or waste water processing.
Third object of the present invention is to provide a kind of processing method of landfill leachate anaerobic effluent deep biological denitrogenation,
The method is using the micro- oxygen of above-mentioned anaerobism-- aerobic biological denitrification reactor for treatment landfill leachate；The method is with rubbish
Aerobic sludge in percolate treatment process is seed sludge, using landfill leachate anaerobic effluent as water inlet, using preposition anti-
Nitrification controls the area Wei Yang DO in the KClO of 0.5~1.0mg/L, 3~7mmol/L of addition using the reactor3Carry out short distance
It nitrifies, the NO in the reflux of nitrosation liquid2 -- N can make full use of into the carbon source in water and carry out denitrification, denitrification denitrogenation supplement
Basicity maintains the area Wei Yang pH relatively stable, provides item for the growth of AOB for balancing the area Wei Yang because of basicity consumed by nitrification
Part；Postposition aerobic tank can remove a part of COD and NH under high dissolved oxygen condition4 +- N, it is ensured that effluent index is up to standard.
In one embodiment of the invention, the operation of whole process reactor is divided into 5 stages, respectively stage I~V.
In one embodiment of the invention, the step specifically:
1) inoculation derives from garbage leachate treatment process sludge concentration tank, and sludge concentration is 4~7g/L aerobic tank sludge；
2) water outlet of the landfill leachate after anaerobic fermentation, pH value are 6.5~8.2, COD, NH4 +-N、BOD5, SS and
TP is respectively 5~6g/L, 1~2.2g/L, 1~2g/L, 2.5~4g/L and 35~50mg/L, and entire implementation process is broadly divided into 5
In a stage, 15 operating conditions, specific experiment operating condition is as shown in table 1, and the first four stage mainly probes into DO mass concentration, water inlet C/
The influence of N and nitrosation liquid reflux ratio (R) to denitrogenation；Under the stable basis of previous experiments, the impact of examination reactor anti-lotus and
Recovery capability；
3) aerobic zone water outlet reaches mud-water separation, all stage regular spoil disposal, sludge age (SRT) control after sedimentation basin
It controls in 15-20d, MLSS in 5~10g/L.
In one embodiment of the invention, water inlet C/N is 4~8；The area Wei Yang DO is 0.2~1.5mg/L；Nitrosation
Liquid reflux ratio is 300%~1500%；Return sludge ratio is 20%~40%.
In one embodiment of the invention, entire implementation process temperature control passes through online temperature at 30~35 DEG C
Control system and heating device link, and inside reactor temperature is kept to stablize.
In one embodiment of the invention, the KClO of 3~7mmol/L is added to the area Wei Yang in initial start stage3。
In one embodiment of the invention, anaerobic zone continuously stirs, and the area Wei Yang controls DO in 0.5~1.0mg/L, good
Oxygen area controls DO in 3.0~5.0mg/L.
Beneficial effects of the present invention:
(1) the AOB strain after transition region of the present invention is tamed in order to prevent enters aerobic tank；It prevents simultaneously due to nitrosation liquid
Being back to anaerobic zone will lead to the rising of anaerobic zone DO concentration.If will lead to the area Wei Yang dominant bacteria without transition region to be lost, anti-nitre
Changing effect reduces, and can preferably solve the problems, such as that reflux causes anaerobic zone DO concentration to rise after transition zone residence.
(2) it is equipped with a partition inside the area Zhong Weiyang of the present invention, transition region and aerobic zone, partition is lower ending opening.
The purpose being arranged in this way is to increase water flow displacement, increases hydraulic detention time, keeps reaction in each unit more abundant, entire to be
It is higher that system is discharged each pollutants removal rate.
(3) present invention is directed to the high ammonia nitrogen of waste water, low C/N ratio characteristic, by the aerobic short distance nitration reactor of the micro- oxygen-of anaerobism-,
Using the difference of AOB and NOB oxygen saturation constant, pass through DO concentration, addition chemical inhibitor KClO inside limited reactions device3Come fast
Speed enrichment AOB, while other conditions such as control temperature, basicity obtain the accumulation of nitrite, the area Wei Yang nitrosoation rate reaches
90% or more.
(4) NO using landfill leachate anaerobic effluent as water inlet, using Prepositive denitrification, in the reflux of nitrosation liquid2 --N
It can make full use of into the carbon source in water and carry out denitrification, system water outlet COD removal rate is maintained at 80% or so, NH after stablizing4 +-
N removal rate is maintained at 98% or more.Compared to traditional nitration denitrification, " NO is omitted in short-cut nitrification and denitrification2 --N→NO3 --N
→ NO2 -- N " process saves about 25% oxygen demand and 40% organic carbon source, for high NH4 +- N, low C/N waste water have
Higher application value.
(5) method of the invention utilizes the micro- oxygen of anaerobism-- aerobic biological denitrification reactor of autonomous Design research and development, by system
DO concentration and aeration pump form linkage, limit the DO concentration in the area Wei Yang, add Chemical Inhibition KClO3, while controlling reaction temperature
Degree and pH obtain preferable nitrite nitrogen and add up, and utilize the control of DO concentration, and enriched AOB eliminates NOB, using this technology
By ammonia control in the nitrite stage, nitrosation liquid is then back to anaerobic zone, the NO in reflux2 -- N can make full use of
Carbon source in water inlet carries out denitrification, and the method can save a large amount of carbon sources and the energy relative to traditional nitration denitrification.Due to anti-
Answering device influent COD is 5~6g/L, NH4 +- N is 1~2.2g/L, anaerobism-of the method for the invention based on short-cut nitrification and denitrification
Micro- oxygen-aerobic biological denitrification reactor NH with higher4 +- N and COD load, can preferably handle high-concentration ammonia nitrogenous wastewater.
The method of the invention process runs well is seen by reactor operational effect, can be kept higher nitrosoation rate for a long time, is
System adjusts in time after being impacted by certain load, and system decontamination ability can quickly be restored.
Detailed description of the invention
Fig. 1 is the micro- oxygen of anaerobism-- aerobic biological denitrification structure of reactor schematic diagram of the invention；Wherein；1, intake pool；2,
Intake pump；3, reactor body；4, blender；5, pH on-line determination instrument；6, on-line temperature monitoring instrument；7, Wei Yang area DO are online
Analyzer；8, Wei Yang area's air pumps；9, aerobic zone DO on-line determination instrument；10, aerobic zone air pump；11, sedimentation basin；12, nitrous
Change liquid reflux pump；13, sludge reflux pump；14, PLC controls and remote monitoring system；15, aerator；16, water inlet；17,
Water outlet；18, mud discharging mouth；19, partition；20, baffle plate.
Fig. 2 is accumulation rate of nitrite trend；
Fig. 3 is COD variation tendency in implementation process；
Fig. 4 is NH in implementation process4 +- N variation tendency；
Fig. 5 is TN variation tendency in implementation process；
Fig. 6 is influence and functional rehabilitation situation of the impact load to system performance.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that embodiment is in order to preferably explain this hair
It is bright, it is not used in the limitation present invention.
In formula:Respectively Inlet and outlet water nitrous
The concentration difference of state nitrogen and nitrate nitrogen, mg/L.
Embodiment 1: the micro- oxygen of anaerobism-- aerobic biological denitrification reactor
As shown in Figure 1, the micro- oxygen of anaerobism-of the invention-aerobic biological denitrification reactor, including intake pool 1, reactor body
3, sedimentation basin 11 and PLC control system 14；The intake pool 1 is connected by intake pump 2 and the water inlet 16 of reactor body 3
It connects；4 regions are divided into partition 19 inside the reactor body 3, are followed successively by anaerobic zone, Wei Yangqu, transition region and aerobic zone；
19 bottom of partition is connect with the bottom of reactor body 3, and certain distance is reserved at the top of top and reactor body 3；Institute
It states and is equipped with blender 4 inside anaerobic zone；PH on-line determination instrument 5, on-line temperature monitoring instrument 6, micro- oxygen are equipped with inside the area Wei Yang
Area's DO on-line computing model 7 and the area Wei Yang air pump 8；The transition region bottom is connected by nitrosation liquid reflux pump 12 and intake pump 2
It connects；Aerobic zone DO on-line computing model 9 and aerobic zone air pump 10 are equipped with inside the aerobic zone；The reactor body 3 passes through
Water outlet is connect with sedimentation basin 11；11 bottom of sedimentation basin is connect by sludge reflux pump 13 with intake pump 2；The intake pump
2, blender 4, pH on-line determination instrument 5, on-line temperature monitoring instrument 6, the area Wei Yang DO on-line computing model 7, the area Wei Yang air pump 8, good
The equal and PLC control of oxygen area DO on-line computing model 9, aerobic zone air pump 10, nitrosation liquid reflux pump 12 and sludge reflux pump 13
System 14 connects.
A baffle plate 20, the baffle plate 20 and reactor are equipped with inside the area Wei Yang, transition region and aerobic zone
The top of main body 3 connects, and certain distance is reserved in the bottom of bottom and reactor body 3；The purpose being arranged in this way is to increase water flow
Displacement increases hydraulic detention time.
Heating device is arranged in 3 side wall of reactor body, and the heating device is connect with PLC control system 14.It is described
PLC control system is also connect with remote monitoring system, and passes through cable network and remote monitoring system exchange data information and control
Information processed；Control program in the PLC control system is using Wuxi Ma Sheng environmental energy Science and Technology Ltd. MA-101
Type process control programmable controller.
The inlet and outlet are located at reactor body two sides, and reactor body side is arranged in the water inlet
Bottom；The water outlet is set to the top of the reactor body other side.
The denitrification reactor is equipped with aerator 15 in the area Wei Yang and aerobic zone bottom, and air inlet 16 passes through pipeline and sky
Air pump connection, is arranged gas flowmeter between air inlet and air pump.
The blender is accurate blender；The reactor is made of stainless steel material；The heating device is silica gel
Heating tape；Asbestos layer is also set up on the outside of the silica gel heating band.
The intake pool length is respectively 40cm, 40cm and 30cm；Reactor body length is respectively 100
Cm, 15cm and 50cm, total measurement (volume) 75L, inside are divided into 4 lattice, respectively anaerobic denitrifying pond, micro- oxygen nitrosation pond, transition pond
And aerobic tank, each pond dischargeable capacity is respectively 10L, 21L, 2L and 20L；Vertical secondary settling tank dischargeable capacity is 15L.
The working principle of the invention is: the landfill leachate anaerobic effluent in intake pool 1 enters reaction by intake pump 2
In 3 anaerobic zone of device main body, the intake pump and PLC control system 14 are formed and are linked, and adjust feed water flow by PLC control system
Amount.Accurate blender 4 is equipped at the top of anaerobic zone；The precision blender 4 is formed with PLC control system 14 to link, and passes through PLC
Control system adjusts mixing speed.The area Wei Yang and aerobic zone bottom are equipped with aerator 15, and aerator 15 passes through pipeline point
It is not connect with air pump 8 and air pump 10, is respectively that the area Wei Yang and aerobic zone are aerated using air pump 8 and air pump 10,
Adaptable dissolved oxygen is provided for its inside, the area Wei Yang is additionally provided with pH on-line determination instrument 5, on-line temperature monitoring instrument 6, the area Wei Yang DO
On-line computing model 7, one end are connect with the probe that inside reactor is arranged in respectively, are monitored to each parameter of inside reactor；
The other end and PLC control system 14, which are formed, to link, and adjusts pH, temperature and the DO value in the area Wei Yang；The area Wei Yang DO on-line computing model 7
Linkage is formed by PLC control system 14 with the area Wei Yang air pump 8, the area Wei Yang DO on-line computing model 7 measures the area Wei Yang DO value,
PLC system is fed back, PLC passes through the flow of the control area Wei Yang air pump 8 again to ensure that the area Wei Yang DO concentration is stablized.Waste water passes through
Transition region a part enters aerobic zone, and a part enters anaerobic zone after mixing by nitrosation liquid reflux pump 12 with water inlet；Nitrous
Change liquid reflux pump 12 and PLC control system 14 is formed and linked, the return flow of nitrosation liquid is adjusted by PLC control system.It is good
Oxygen area is also provided with DO on-line computing model 9, and aerobic zone DO on-line computing model 9 and aerobic zone air pump 10 pass through PLC control system shape
At linkage, aerobic zone DO on-line computing model 9 measures aerobic zone DO value, and feedback arrives PLC system, and it is empty that PLC passes through control aerobic zone again
The flow of air pump 10 is to ensure that aerobic zone DO concentration keeps stablizing.Reactor body water outlet enters sedimentation basin 11 and forms muddy water point
From, water outlet is discharged by the water outlet on 11 top of sedimentation basin, and sludge a part of precipitating is periodically discharged by mud discharging mouth 18, and one
Divide and anaerobic zone is entered by sludge reflux pump 13 and water inlet, the reflux of nitrosation liquid together；Sludge reflux pump 13 and PLC control system
14 form linkage, pass through the return flow of PLC control system conditioning of mud.Intake pump 2, accurate blender 4, pH on-line determination instrument
5, the on-line temperature monitoring instrument 6, area Wei Yang DO on-line computing model 7, the area Wei Yang air pump 8, aerobic zone DO on-line computing model 9, aerobic
Area's air pump 10, nitrosation liquid reflux pump 12 and sludge reflux pump 13 implement essence by PLC control and remote monitoring system 14
Quasi- control and real time information monitoring and feedback.
Embodiment 2: the micro- oxygen of anaerobism-- aerobic biological denitrification reactor operation phase
To reactor body part seed sludge, seed sludge comes from Refuse Leachate Treatment Plant sludge concentration tank aerobic tank
Sludge, sludge concentration 6g/L, anaerobic zone continuously stir, and the area Wei Yang controls DO and exists in 0.5~1.0mg/L, aerobic zone control DO
3.0~5.0mg/L temperature controls 30 ± 1 DEG C.It is run using continuous stream mode, water outlet of the landfill leachate after anaerobic fermentation,
PH value is 6.5~8.2, COD, NH4 +-N、BOD5, SS and TP be respectively 5~6g/L, 1~2.2g/L, 1~2g/L, 2.5~4g/
L and 35~50mg/L, entire implementation process are broadly divided into 5 stages, and 15 operating conditions, specific experiment operating condition is as shown in table 1,
The first four stage mainly probes into the influence of DO mass concentration, water inlet C/N and nitrosation liquid reflux ratio (R) to denitrogenation.
Influence of the 1 different parameters condition of table to denitrogenation
First stage NO2 -- N is in rising trend, since KClO is added in nitrosation pond in 6d3Inhibit NOB growth, causes
NH4 +- N oxidation process largely rests on NO2 -- N stage, NO2 -- N mass concentration is significantly increased after 7d.To nitrosation
Pond limit oxygen and chemical inhibitor collectively promote effect, and nitrosoation rate rises very rapidly up to 90% or more.Nitrous is arranged in second stage
Change pond DO difference gradient, after discovery reduces DO mass concentration, is discharged NO2 -- N is persistently reduced.After restoring DO, it is discharged NO2 -- N quality
Concentration rises to the 300mg/L of 25d, when continuing to increase DO mass concentration to 1.0~1.5mg/L, is discharged NO2 -- N and NO3 --
N mass concentration keeps fuctuation within a narrow range, and system nitrosoation rate maintains 94% or so, and therefore, the area Wei Yang DO mass concentration is kept
It can stablize in 0.5~1.0mg/L and maintain higher nitrosoation rate.Phase III, nitrosation pond went out with the increase of water inlet C/N
Water NO2 -The decline of-N mass concentration illustrates after improving water inlet C/N, with a large amount of NO of nitrosation liquid reflux2 -- N is carried out in anaerobic zone
Denitrification causes nitrosation pond nitrosoation rate to be down to 72%.Fourth stage adjusts nitrosation liquid reflux ratio R, and discovery operating condition 9 is sub-
Nitrification tank is discharged NO2 -- N mass concentration has to be risen to a certain degree.It is most in this later period in stage (R >=1200%) system
NO2 -- N and NO3 -- N is back to anaerobic zone and carries out denitrification, and the area Wei Yang is discharged NO2 -- N mass concentration drops to 14mg/L, with
The area Wei Yang nitrosoation rate be dropped rapidly to 58% (Fig. 2).
Starting period first stage is due to tamed strain and adaptation, in addition causing in water inlet there are organic matter difficult to degrade
Slow ascendant trend is presented in this stage Anaerobic, micro- oxygen and system water outlet COD.After operating condition 3 reduces the area Wei Yang DO, anaerobism, micro- oxygen
Water outlet COD rises respectively, anaerobism during this, the area Wei Yang and water outlet COD mass concentration average value be respectively 1528 mg/L,
1421mg/L and 600mg/L.With the rising of DO mass concentration, each pond of system water outlet COD is more stable, reactor be discharged COD by
For step steadily in 700mg/L or so, COD average removal rate is 83%.Phase III influent COD changes in gradient, anaerobism and micro- oxygen
Area water outlet COD constantly rises.Since water inlet supplementary carbon source methanol is easily biodegradable organics, it is easy in aerobic zone by microorganism
Utilize, therefore, the area Wei Yang water outlet COD increase to system water outlet does not impact, water outlet COD maintain 544mg/L~
772mg/L, average out to 706mg/L.With the increase of nitrosation liquid reflux ratio R, a large amount of NO in system2 -- N and NO3 -- N is back to
Anaerobic zone carries out denitrification, and anaerobic zone, the area Wei Yang and system water outlet COD are on a declining curve.Entire experimental stage system is to COD
Average removal rate realizes COD and stablizes and efficiently remove (Fig. 3) up to 89.2%.
The water outlet of 1 area Wei Yang of operating condition maintains essentially in 10mg/L or so, after being replaced completely with anaerobic zone by water inlet, operating condition 2
Under the conditions of anaerobic effluent NH4 +- N is relatively stable, and the area Wei Yang is discharged NH4 +- N appearance first increases the phenomenon that reducing afterwards.Second stage with
The area Zhe Weiyang DO decline, anaerobic zone and the area Wei Yang are discharged NH4 +- N rises rapidly, since aerobic zone DO concentration is higher, system water outlet
NH4 +- N keeps stablizing.Entire phase III each pond is discharged NH4 +- N mass concentration is relatively steady, due to that will intake C/N tune in 53d
To 8, organic matter is not fully utilized in anaerobic zone, into the area Wei Yang after heterotrophic bacteria grow, formed and competed with AOB, caused micro- in 54d
Oxygen area is discharged NH4 +There is fuctuation within a narrow range in-N.Fourth stage is sufficiently mixed with the increase anaerobism and the area Wei Yang of R, the water outlet of the area Wei Yang
NH4 +- N mass concentration rises to 56mg/L from 16mg/L.Variation anaerobic zone and the area Wei Yang NH with response parameter4 +- N removal
There is certain fluctuation, but aerobic tank DO is always maintained at higher level, system NH4 +- N removal rate is maintained at 98% or more (Fig. 4).
NH under the conditions of operating condition 34 +- N, which effectively cannot be converted and be removed, causes anaerobic zone and system water outlet TN to become in rising
Gesture, with the area Wei Yang DO rise, water outlet TN mass concentration decline, during this system TN removal rate equally presents decline rise again after
It tends towards stability.Operating condition 7 it can be found that anaerobic zone and system water outlet TN mass concentration presentation be decreased obviously, mainly due to improve into
Water C/N, system carbon source is sufficient, and the nitrosation liquid of reflux can preferably carry out denitrification, and anaerobic effluent TN is obtained preferably
Removal, system TN removal rate are promoted to 86% from 77%.With water inlet C/N readjustment, system denitrification in fourth stage operating condition 9
Rate slows down, and anaerobic effluent and system water outlet TN mass concentration are in rising trend, but as R is stepped up, a large amount of NO2 -- N and
NO3 -- N is back to anaerobic zone and carries out denitrification, and water outlet TN declines rapidly, and system TN removal rate is in gradually rise.Anaerobic effluent and
System goes out TN variation tendency and is consistent substantially, illustrates that system denitrification functions are concentrated mainly in anaerobic pond, by testing item
System is discharged TN removal rate up to 90% or more (Fig. 5) after the optimization of part.
Embodiment 3: the micro- oxygen of anaerobism-- aerobic biological denitrification reactor anti-load impact and recovery capability
With embodiment 2, difference is specific embodiment: examining or check the anti-load impact of reactor after the completion of first part's experiment
And recovery capability, 73~75d lifting system influent load, NH4 +- N load is from 0.21kg NH4 +/(m3D) it is promoted to 0.51kg
NH4 +-N/(m3D), micro- oxygen is discharged NO2 -- N rises to highest 316mg/L from the 14mg/L of 72d, and aerobic tank is discharged NO2 -- N matter
Rising to a certain degree also occurs in amount concentration.System COD load is from 1.25kg COD/ (m3D) 2.61 kg COD/ are promoted to
(m3D), anaerobic effluent and system are discharged COD, NH4 +- N mass concentration is substantially increased, and aerobic tank is in a short time to prominent
The COD and NH so increased4 +- N load fails to make preferable response, and aerobic tank COD load is from 0.25kg COD/ during this
(m3D) 1.34kg COD/ (m is risen to3D), NH4 +- N load is from 0.02kg NH4 +/(m3D) 0.07kg NH is risen to4 +-N/(m3D)), COD and NH4 +- N removal rate drops to 87% and 95% from 91% and 99% respectively.After system is impacted
The reaction of TN removal efficiency is the most obvious, and obviously increasing suddenly occurs in each pond water outlet TN, and system TN removal rate is down to 76% from 90%, explanation
When system is by load impact, system can not digest a large amount of organic matter in a short time, cannot effectively be converted to nitrogen, such as
Fruit is impacted by high load capacity for a long time, and system has the risk of destruction.76d starts to reduce influent load, and nitrosation liquid reflux ratio R increases
To 1200%, return sludge ratio r increases to 40%, and system is gradually recovered, in experiment latter stage micro- oxygen pond NO2 -- N is down to 70~100mg/
Between L, aerobic tank NO2 -- N is down to 2 mg/L hereinafter, the area Wei Yang nitrosoation rate is relatively stable, maintains essentially in 94% or more.Through
After spending the convalescence of nearly 10d, system is discharged COD and stablizes in 600mg/L or so, COD, NH4 +- N and TN removal rate respectively it is stable
85%, 99% and 90%, illustrate that system adjusts system decontamination ability in time after being impacted by certain load and can quickly obtain
Restore (Fig. 6).
Although the present invention has been described by way of example and in terms of the preferred embodiments, it is not intended to limit the invention, any to be familiar with this skill
The people of art can do various change and modification, therefore protection model of the invention without departing from the spirit and scope of the present invention
Enclosing subject to the definition of the claims.
Claims (10)
1. a kind of micro- oxygen of anaerobism-- aerobic biological denitrification reactor, which is characterized in that including intake pool, reactor body, precipitating
Pond and PLC control system；The intake pool is attached by intake pump and reactor body water inlet；The reactor body
Inside is divided into 4 regions with partition, is followed successively by anaerobic zone, Wei Yangqu, transition region and aerobic zone；The partition bottom and reactor
Certain distance is reserved at bottom part body connection, top and reactor body top；Inside the area Wei Yang, transition region and aerobic zone
It equipped with a baffle plate, is connect at the top of the baffle plate and reactor body, a spacing is reserved in bottom and reactor body bottom
From；Agitating device is equipped with inside the anaerobic zone；Be equipped with inside the area Wei Yang pH on-line determination instrument, on-line temperature monitoring instrument,
The area Wei Yang DO on-line computing model and the area Wei Yang air pump；The transition region bottom is connected by nitrosation liquid reflux pump and intake pump
It connects；Aerobic zone DO on-line computing model and aerobic zone air pump are equipped with inside the aerobic zone；The reactor by water outlet with
Sedimentation basin connection；The precipitating bottom of pond portion is connect by sludge reflux pump with intake pump；The intake pump, agitating device, heating
Device, pH on-line determination instrument, on-line temperature monitoring instrument, the area Wei Yang DO on-line computing model, the area Wei Yang air pump, aerobic zone DO are online
Monitor, aerobic zone air pump, nitrosation liquid reflux pump and the equal of sludge reflux pump are connect with PLC control system.
2. reactor according to claim 1, which is characterized in that heating device, institute is arranged in the reactor body side wall
Heating device is stated to connect with PLC control system.
3. reactor according to claim 2, which is characterized in that the reactor body is made of stainless steel material；Institute
Stating heating device is silica gel heating band；Asbestos layer is also set up on the outside of the silica gel heating band.
4. reactor according to claim 1, which is characterized in that the area Wei Yang and aerobic zone bottom are equipped with aerator, expose
Air inlet in device of air is connect by pipeline with air pump, and gas flowmeter is arranged between air inlet and air pump.
5. a kind of processing method of landfill leachate anaerobic effluent deep biological denitrogenation, which is characterized in that the method is with rubbish
Rubbish percolate anaerobic effluent is as water inlet, using Prepositive denitrification, using any micro- oxygen-of anaerobism-of Claims 1 to 4
Aerobic biological denitrification reactor for treatment landfill leachate.
6. processing method according to claim 5, which comprises the following steps:
1) to reactor body part seed sludge, seed sludge is dirty from Refuse Leachate Treatment Plant sludge concentration tank aerobic tank
Mud, sludge concentration are 4~7g/L aerobic tank sludge；
2) water outlet of the landfill leachate after anaerobic fermentation, pH value are 6.5~8.2, COD, NH4 +-N、BOD5, SS and TP difference
For 5~6g/L, 1~2.2g/L, 1~2g/L, 2.5~4g/L and 35~50mg/L；
3) aerobic zone water outlet reaches mud-water separation, all stage regular spoil disposal after sedimentation basin, and sludge age (SRT) control exists
15-20d, MLSS are controlled in 5~10g/L.
7. processing method according to claim 5 or 6, which is characterized in that entire implementation process temperature control is 30~35
℃。
8. processing method according to claim 7, which is characterized in that C/N of intaking in reactor operational process is 4~8；It is micro-
Oxygen area DO is 0.2~1.5mg/L；Nitrosation liquid reflux ratio is 300%~1500%；Return sludge ratio is 20%~40%.
9. processing method according to claim 5 or 6, which is characterized in that anaerobic zone continuously stirs, and the area Wei Yang control DO exists
0.5~1.0mg/L adds the KClO of 3~7mmol/L3, aerobic zone controls DO in 3.0~5.0mg/L.
10. application of any reactor of Claims 1 to 4 in sewage or waste water processing.
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