CN108928923A - A kind of garbage leachate biological denitrification system and method - Google Patents
A kind of garbage leachate biological denitrification system and method Download PDFInfo
- Publication number
- CN108928923A CN108928923A CN201811050810.2A CN201811050810A CN108928923A CN 108928923 A CN108928923 A CN 108928923A CN 201811050810 A CN201811050810 A CN 201811050810A CN 108928923 A CN108928923 A CN 108928923A
- Authority
- CN
- China
- Prior art keywords
- denitrification
- level
- sedimentation tank
- pond
- preliminary sedimentation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004062 sedimentation Methods 0.000 claims abstract description 69
- 239000010802 sludge Substances 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000000149 chemical water pollutant Substances 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 238000005276 aerator Methods 0.000 claims description 18
- 238000010992 reflux Methods 0.000 claims description 17
- 238000005273 aeration Methods 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 2
- 238000005243 fluidization Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 13
- 230000001376 precipitating effect Effects 0.000 abstract description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 238000007872 degassing Methods 0.000 description 8
- 239000001301 oxygen Substances 0.000 description 8
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 238000000108 ultra-filtration Methods 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 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 3
- 230000008901 benefit Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001728 nano-filtration Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001223 reverse osmosis Methods 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000004021 humic acid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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
- C02F3/302—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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- 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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
A kind of garbage leachate biological denitrification system of the invention, including level-one denitrification pond, it is thoroughly mixed aerobic fluidized bed reactor, second level denitrification preliminary sedimentation tank and the built-in pond MBR；Level-one denitrification pond is connect with aerobic fluidized bed reactor is thoroughly mixed, and is thoroughly mixed aerobic fluidized bed reactor and is connect with second level denitrification preliminary sedimentation tank, second level denitrification preliminary sedimentation tank is connect with the built-in pond MBR；Being thoroughly mixed aerobic fluidized bed reactor further includes overflow weir, and the water outlet for being thoroughly mixed aerobic fluidized bed reactor passes through overflow weir overflow to second level denitrification preliminary sedimentation tank；Second level denitrification preliminary sedimentation tank is divided into exhalant region and settling zone from top to bottom.The present invention proposes that investment and energy consumption can be greatly reduced while having efficient denitrification ability using the built-in MBR process landfill leachate of two-stage denitrification/nitrification-.Second level denitrification preliminary sedimentation tank, which has to reduce by precipitating, is discharged sludge concentration, guarantees that built-in MBR system is in optimal operating status.
Description
Technical field
The present invention relates to technical field of landfill leachate treatment more particularly to a kind of garbage leachate biological denitrification systems
And method.
Background technique
Country's landfill leachate majority is handled according to " pretreatment+biological treatment+advanced treating " technology path selection at present
Technique finalizes the design almost in " pretreatment " and " advanced treating " process choice." pretreatment " technique can be seeped according to the different landfill stages
The water quality characteristic selection anaerobism or water quality homogenizing unit of filtrate.It is organic due to there are a large amount of humic acids difficult to degrade in percolate
Matter, it is difficult to be utilized again by biochemistry, to meet the emission request of new standard, it is necessary to further advanced treating, usually alone or in combination
Select nanofiltration (NF), reverse osmosis (RO), retention can not biochemical treatment larger molecular organics, this is that entire engineering is last up to standard
It ensures.The selection of biological treatment focuses on how efficiently removing ammonia nitrogen and total nitrogen.Theoretical based on traditional biological denitrogenation
Percolate process field is widely applied two-stage denitrification/nitrification+external ultrafiltration biochemical process at home.Patent
CN106277613A also discloses a kind of method for treating garbage percolation liquid, and landfill leachate first carries out aeration pretreatment, after by
Prepositive denitrification processing and biochemical reactor complete level-one denitrogenation, carry out rear-mounted denitrification processing after water degasification out, expose again later
It is separated by solid-liquid separation after gas precipitating by external ultrafiltration membrane, clear liquid carries out advanced treating using RO/NF.However, above scheme
Practical Project operating condition the problems such as to show that there are technique nitric efficiencies undesirable, investment is high, energy consumption is high and land occupation is big.
Summary of the invention
The object of the present invention is to provide a kind of garbage leachate biological denitrification system and methods, are able to solve nitric efficiency not
Problem ideal, investment is high, energy consumption is high and land occupation is big.
To achieve the goals above, a kind of garbage leachate biological denitrification system provided by the invention, including the anti-nitre of level-one
Change pond, be thoroughly mixed aerobic fluidized bed reactor, second level denitrification preliminary sedimentation tank and the built-in pond MBR；Level-one denitrification pond
It is thoroughly mixed aerobic fluidized bed reactor with described and connect, it is described to be thoroughly mixed aerobic fluidized bed reactor and the anti-nitre of the second level
Change preliminary sedimentation tank connection, the second level denitrification preliminary sedimentation tank is connect with the built-in pond MBR；It is described be thoroughly mixed it is aerobic fluidized bed
Reactor further includes overflow weir, and the water outlet for being thoroughly mixed aerobic fluidized bed reactor is by the overflow weir overflow to described
Second level denitrification preliminary sedimentation tank；The second level denitrification preliminary sedimentation tank is divided into exhalant region and settling zone from top to bottom.
Further, it is additionally provided with interior reflux unit between the built-in pond MBR and the second level denitrification preliminary sedimentation tank,
The interior reflux unit is used to the mixed liquor of the sludge in the built-in pond MBR and nitrification liquid being back to the second level denitrification
Preliminary sedimentation tank.
Sludge refluxing apparatus, the dirt are additionally provided between the second level denitrification preliminary sedimentation tank and level-one denitrification pond
Mud reflux unit is used to the mixed liquor of the sludge of the second level denitrification preliminary sedimentation tank settling zone and nitrification liquid being back to described one
Grade denitrification pond.
Further, level-one denitrification pond, described be thoroughly mixed aerobic fluidized bed reactor, the second level denitrification
Rotary-cut mixed flow aerator is provided in preliminary sedimentation tank and the built-in pond MBR.
The present invention also provides a kind of garbage leachate biological denitrification methods, include the following steps:
(1) landfill leachate is sent into level-one denitrification pond and carries out denitrification；
(2) water outlet of level-one denitrification pond, which enters, is thoroughly mixed aerobic fluidized bed reactor progress aerobic nitrification reaction；Completely
Aerobic fluidized bed reactor water outlet passes through overflow weir overflow to second level denitrification preliminary sedimentation tank；
(3) completely aerobic fluidized bed reactor water outlet is layered after entering second level denitrification preliminary sedimentation tank, second level denitrification preliminary sedimentation
Pond is discharged superposed exhalant region, and sludge sinks to the settling zone of lower part, denitrification denitrogenation is carried out during sludge settling；
(4) second level denitrification preliminary sedimentation tank water outlet enters the built-in pond MBR, in this nitrifier by remaining mineralized nitrogen at nitre
State nitrogen.
Further, sludge concentration is 20~30g/L in level-one denitrification pond in step (1), and level-one denitrification pond passes through
Rotary-cut mixed flow aerator is stirred.
Further, it is 20~30g/L that sludge concentration in aerobic fluidized bed reactor is thoroughly mixed in step (2), completely
Aerobic fluidized-bed reactor is mixed to be stirred by rotary-cut mixed flow aerator and oxygenic aeration.
Further, in step (3) in the exhalant region on second level denitrification preliminary sedimentation tank top sludge concentration be 8~10g/L, two
Grade denitrification preliminary sedimentation tank is stirred by rotary-cut mixed flow aerator.
Further, the built-in pond MBR is stirred and oxygenic aeration by rotary-cut mixed flow aerator.
Further, after the sludge in the built-in pond MBR and the mixed liquor of nitrification liquid are first back to second level denitrification preliminary sedimentation tank
Level-one denitrification pond is back to from second level denitrification preliminary sedimentation tank by the mixed liquor of sludge and nitrification liquid again.
The invention has the following beneficial effects:
1, the present invention proposes to use built-in MBR pool process, substitutes traditional external ultrafiltration technology, has efficient denitrification energy
Investment, energy consumption and occupied area can be greatly reduced while power.
2, the sludge concentration for being thoroughly mixed aerobic fluidized bed reactor in the present invention may be up to 20~30g/L, and oxygen utilizes
Rate is up to 80%, with the advantage that treatment effeciency is high, aeration energy consumption is low, takes up little area.
3, the second level denitrification preliminary sedimentation tank in the present invention has two functions: 1) denitrification denitrogenation；2) it is reduced by precipitating
It is discharged sludge concentration, guarantees that subsequent built-in MBR system is in optimal operating status.
4, mechanical stirring equipment is substituted using rotary-cut mixed flow aerator in the present invention, the electromechanics that can save denilrification system is set
Standby energy consumption and maintenance management work.
5, the water outlet that aerobic fluidized bed reactor is thoroughly mixed in the present invention is pre- to second level denitrification by overflow weir overflow
Heavy pond, can complete degassing in flooding process, it is not necessary that degassing pond, simplification of flowsheet is separately provided.
6, the mixed liquor of present invention design sludge and nitrification liquid is back to second level denitrification preliminary sedimentation tank from the built-in pond MBR,
It is back to level-one denitrification pond from second level denitrification preliminary sedimentation tank again, reflux control is simple, but can guarantee effect, it may be assumed that guarantee has
Enough nitrate nitrogens are back to level-one denitrification pond, and are unlikely to destroy the anaerobic environment in level-one denitrification pond.
Detailed description of the invention
Fig. 1 is garbage leachate biological denitrification system treatment process figure.
Wherein:
1, level-one denitrification pond；2, rotary-cut mixed flow aerator；3, air inlet pipe；4, it is thoroughly mixed aerobic fluidized bed reactor；
5, second level denitrification preliminary sedimentation tank；6, the built-in pond MBR；7, sludge refluxing apparatus；8, interior reflux unit.
Specific embodiment
The present invention will be further described with attached drawing combined with specific embodiments below, to help the contents of the present invention are understood.
Case study on implementation 1:
A kind of garbage leachate biological denitrification system, including level-one denitrification pond, be thoroughly mixed aerobic fluidized bed reactor,
Second level denitrification preliminary sedimentation tank and the built-in pond MBR；Level-one denitrification pond is thoroughly mixed aerobic fluidized bed reactor with described
Connection, described to be thoroughly mixed aerobic fluidized bed reactor and connect with the second level denitrification preliminary sedimentation tank, the second level denitrification is pre-
Heavy pond is connect with the built-in pond MBR；Described to be thoroughly mixed aerobic fluidized bed reactor further include overflow weir, described completely mixed
The water outlet for getting togather oxygen fluidized-bed reactor passes through the overflow weir overflow to the second level denitrification preliminary sedimentation tank；The anti-nitre of second level
Change preliminary sedimentation tank and is divided into exhalant region and settling zone from top to bottom.
Be additionally provided with interior reflux unit between the built-in pond MBR and the second level denitrification preliminary sedimentation tank, it is described in return
Stream device is used to the mixed liquor of the sludge in the built-in pond MBR and nitrification liquid being back to the second level denitrification preliminary sedimentation tank.
Sludge refluxing apparatus, the dirt are additionally provided between the second level denitrification preliminary sedimentation tank and level-one denitrification pond
Mud reflux unit is used to the mixed liquor of the sludge of the second level denitrification preliminary sedimentation tank settling zone and nitrification liquid being back to described one
Grade denitrification pond.
Level-one denitrification pond, it is described be thoroughly mixed aerobic fluidized bed reactor, the second level denitrification preliminary sedimentation tank and
Rotary-cut mixed flow aerator is provided in the built-in pond MBR.
A kind of garbage leachate biological denitrification method, includes the following steps:
(1) landfill leachate is entered level-one denitrification pond progress denitrification and is led to using the organic matter in water inlet as carbon source
The nitrate nitrogen in the effect removal water inlet and reflux nitrification liquid of denitrifying bacterium is crossed, realizes the removal of total nitrogen.Level-one denitrification pond is logical
It crosses rotary-cut mixed flow aerator to be stirred, and guarantees DO≤0.5mg/L in pond by the way of intermittent aerating, sludge concentration in pond
For 20~30g/L, can separately add acetic acid according to water inlet BOD/TN value is supplementary carbon source.
(2) water outlet of level-one denitrification pond, which enters, is thoroughly mixed aerobic fluidized bed reactor progress aerobic nitrification reaction, by nitre
Changing bacterium for the mineralized nitrogen in water inlet is nitrate nitrogen.Sludge concentration is up to 20~30g/L in reactor, same that rotary-cut mixed flow is arranged
Aerator realizes oxygenic aeration, and guarantee has sufficient dissolved oxygen, while guaranteeing the efficient hybrid reaction of mud air water three-phase (oxygenation).
Completely aerobic fluidized bed reactor is discharged through overflow weir overflow to second level denitrification preliminary sedimentation tank, can be in flooding process
Middle completion degassing stirs small, Neng Goubao to succeeding level-two denitrification pond it is not necessary that degassing pond is separately provided, and because overflow flow velocity is slow
Demonstrate,prove the sludge settling and anoxic denitrification condition in pond.
(3) completely aerobic fluidized bed reactor water outlet is layered after entering second level denitrification preliminary sedimentation tank, second level denitrification preliminary sedimentation
Pond is discharged superposed exhalant region, and sludge sinks to the settling zone of lower part, and sludge concentration is down to 8 by 20~30g/L in exhalant region
~10g/L is to meet the design and operation requirement in the subsequent built-in pond MBR.Denitrification denitrogenation is carried out during sludge settling；Two
The settling zone of grade denitrification preliminary sedimentation tank is stirred by rotary-cut mixed flow aerator, is generally not required to open aeration stirring certainly.
(4) second level denitrification preliminary sedimentation tank water outlet enters the built-in pond MBR, in this nitrifier by remaining mineralized nitrogen at nitre
State nitrogen, and denitrification denitrogenation can be carried out by being back to second level denitrification preliminary sedimentation tank, realize the removal of total nitrogen.Due to anti-in second level
Nitrification preliminary sedimentation tank has carried out mud-water separation, so that the sludge concentration in the built-in pond MBR is between 8~10g/L, it is exactly interior
Set the applicable sludge concentration of formula MBR system.Due to using built-in MBR instead of traditional external MBR system, entire technique
Energy consumption can decline to a great extent.
(5) dissolved oxygen level by the mixed liquor of the sludge and nitrification liquid of the built-in pond MBR reflux is high, is introduced into the anti-nitre of second level
Change preliminary sedimentation tank progress short stay to consume most of dissolved oxygen by the buffer function of preliminary sedimentation tank, later again from the anti-nitre of second level
Change preliminary sedimentation tank and the mixed liquor of sludge and nitrification liquid is back to level-one denitrification pond, in this way, can guarantee there are enough microorganisms
Level-one denitrification pond is returned to nitrate nitrogen, also can guarantee that the phegma of low dissolved oxygen will not destroy the anoxic ring in level-one denitrification pond
Border.
The built-in pond MBR water outlet qualified discharge after advanced treating simultaneously.
Compared with prior art, advantage of the present invention is as follows:
A, the two-stage nitrification/denitrifying sludge concentration whole process of prior art is in the range of 15~30g/L, therefore only
Mud-water separation can be completed using external ultrafiltration, there is investment greatly, the high problem of energy consumption.
Present invention process process are as follows: level-one denitrification pond → be thoroughly mixed aerobic fluidized bed reactor → second level denitrification is pre-
Heavy pond → pond built-in MBR the first order and the sludge concentration of the second level are caused not due to the design of second level denitrification preliminary sedimentation tank
Together, first order sludge concentration may be up to 20~30g/L, and second level sludge concentration can be down to 8~10g/L, it is ensured that built-in MBR
The normal operation of system.Compared to the prior art, while built-in MBR technique proposed by the present invention has efficient denitrification ability
Investment and energy consumption can be greatly reduced.
B. in existing tubular type MBR set technique equipment, using jet aerator (needing air blower and pump) aeration, wherein
The energy consumption of pump is also bigger than blower.Compared with common blast aeration, though jet-flow aeration simple installation, will consume twice or more
Energy, and aeration is the big power consumer of percolate treatment process, almost occupies the half of overall process energy consumption.For example, existing skill
Level-one nitrification uses jet-flow aeration in art scheme, makes required fan delivery reduce by 10~70% although highlighting technological improvement,
The wind pressure of blower in 6m hereinafter, but also refer to simultaneously its pump flow be inflow 300%~1000%, it is such to set
The problem that meter can bring high energy consumption, foam accumulation, height for reactor limited.
In the present invention, aeration and stirring are completed by a kind of rotary-cut mixed flow aerator (blast aeration), it has stirring power
Power is strong, oxygen-transfer efficiency is high, elevated online installation, long service life, it is non-maintaining the features such as.Compared to jet-flow aeration, energy consumption
Can decline to a great extent (coefficient of oxygen utilization is up to 80%), and not will cause foam accumulation problem, meanwhile, level-one nitrification tank can be made i.e. complete
It mixes aerobic fluidized bed height and reaches 16m, the advantage taken up little area is prominent.In addition, the stirring function that rotary-cut mixed flow aerator is powerful
Mechanical stirring equipment can be substituted completely, can also so save the electromechanical equipment energy consumption and maintenance pipe of denilrification system
Science and engineering is made.Finally, the design in the built-in pond MBR in addition, the energy consumption of entire technique declines to a great extent 40% compared with prior art
~60%.
C. prior art needs to be arranged behind level-one nitrification tank degassing pond, to reduce the dissolved oxygen of reflux nitrification liquid
It is horizontal.
In the present invention, the water outlet for being thoroughly mixed aerobic fluidized bed reactor passes through overflow weir overflow to second level denitrification preliminary sedimentation
Pond can complete degassing in flooding process, it is not necessary that degassing pond, simplification of flowsheet is separately provided.Because overflow flow velocity is slow, to subsequent
The disturbance of second level denitrification pond is small, can guarantee sludge settling and anoxic denitrification condition in pond.
D. the reflux of the nitrification liquid and mud mixed liquid of prior art controls complicated, and destructible Prepositive denitrification system
The anaerobic environment of system influences denitrification denitrogenation efficiency.
The present invention designs nitrification liquid and mud mixed liquid and is back to second level denitrification preliminary sedimentation tank from the built-in pond MBR, then from
Preliminary sedimentation tank is back to level-one denitrification pond, but can guarantee effect, it may be assumed that guarantee has enough nitrate nitrogens to be back to level-one denitrification
Pond, and be unlikely to destroy the anaerobic environment in level-one denitrification pond.
Specific case used herein elaborates inventive concept, the explanation of above example is only intended to
Help understands core of the invention thought.It should be pointed out that for those skilled in the art, not departing from this
Under the premise of inventive concept, any obvious modification, equivalent replacement or the other improvements made should be included in the present invention
Protection scope within.
Claims (9)
1. a kind of garbage leachate biological denitrification system, it is characterised in that: including level-one denitrification pond, be thoroughly mixed aerobic fluidisation
Bed reactor, second level denitrification preliminary sedimentation tank and the built-in pond MBR；
Level-one denitrification pond is thoroughly mixed aerobic fluidized bed reactor and connect with described, it is described be thoroughly mixed it is aerobic fluidized bed
Reactor is connect with the second level denitrification preliminary sedimentation tank, and the second level denitrification preliminary sedimentation tank is connect with the built-in pond MBR；
Described to be thoroughly mixed aerobic fluidized bed reactor further include overflow weir, described to be thoroughly mixed going out for aerobic fluidized bed reactor
Water passes through the overflow weir overflow to the second level denitrification preliminary sedimentation tank；
The second level denitrification preliminary sedimentation tank is divided into exhalant region and settling zone from top to bottom.
2. garbage leachate biological denitrification system according to claim 1, it is characterised in that: the built-in pond MBR with
Interior reflux unit is additionally provided between the second level denitrification preliminary sedimentation tank, the interior reflux unit is used for the built-in MBR
The sludge in pond and the mixed liquor of nitrification liquid are back to the second level denitrification preliminary sedimentation tank；
Sludge refluxing apparatus is additionally provided between the second level denitrification preliminary sedimentation tank and level-one denitrification pond, the sludge returns
Stream device is used to the mixed liquor of the sludge of the second level denitrification preliminary sedimentation tank settling zone and nitrification liquid being back to the level-one anti-
Nitrification tank.
3. garbage leachate biological denitrification system according to claim 2, it is characterised in that: level-one denitrification pond,
Described be thoroughly mixed in aerobic fluidized bed reactor, the second level denitrification preliminary sedimentation tank and the built-in pond MBR is provided with
Rotary-cut mixed flow aerator.
4. a kind of garbage leachate biological denitrification using any garbage leachate biological denitrification system of claim 1-3
Method, characterized by the following steps:
(1) landfill leachate is sent into level-one denitrification pond and carries out denitrification；
(2) water outlet of level-one denitrification pond, which enters, is thoroughly mixed aerobic fluidized bed reactor progress aerobic nitrification reaction；It is completely aerobic
Fluidized-bed reactor water outlet passes through overflow weir overflow to second level denitrification preliminary sedimentation tank；
(3) completely aerobic fluidized bed reactor water outlet is layered after entering second level denitrification preliminary sedimentation tank, and second level denitrification preliminary sedimentation tank goes out
The superposed exhalant region of water, sludge sink to the settling zone of lower part, and denitrification denitrogenation is carried out during sludge settling；
(4) second level denitrification preliminary sedimentation tank water outlet enters the built-in pond MBR, in this nitrifier by remaining mineralized nitrogen at nitre state
Nitrogen.
5. garbage leachate biological denitrification method according to claim 4, it is characterised in that: the anti-nitre of level-one in step (1)
Changing sludge concentration in pond is 20~30g/L, and level-one denitrification pond is stirred by rotary-cut mixed flow aerator.
6. garbage leachate biological denitrification method according to claim 5, it is characterised in that: step is thoroughly mixed in (2)
Sludge concentration is 20~30g/L in aerobic fluidized bed reactor, is thoroughly mixed aerobic fluidized bed reactor and is exposed by rotary-cut mixed flow
Gas device is stirred and oxygenic aeration.
7. garbage leachate biological denitrification method according to claim 6, it is characterised in that: the anti-nitre of second level in step (3)
Change preliminary sedimentation tank top exhalant region in sludge concentration be 8~10g/L, second level denitrification preliminary sedimentation tank by rotary-cut mixed flow aerator into
Row stirring.
8. garbage leachate biological denitrification method according to claim 7, it is characterised in that: the built-in pond MBR passes through rotation
Mixed flow aerator is cut to be stirred and oxygenic aeration.
9. garbage leachate biological denitrification method according to claim 8, it is characterised in that: the sludge in the built-in pond MBR
It is first back to after second level denitrification preliminary sedimentation tank with the mixed liquor of nitrification liquid again from second level denitrification preliminary sedimentation tank by sludge and nitrification liquid
Mixed liquor be back to level-one denitrification pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050810.2A CN108928923A (en) | 2018-09-10 | 2018-09-10 | A kind of garbage leachate biological denitrification system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811050810.2A CN108928923A (en) | 2018-09-10 | 2018-09-10 | A kind of garbage leachate biological denitrification system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108928923A true CN108928923A (en) | 2018-12-04 |
Family
ID=64443693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811050810.2A Pending CN108928923A (en) | 2018-09-10 | 2018-09-10 | A kind of garbage leachate biological denitrification system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108928923A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110294565A (en) * | 2019-04-15 | 2019-10-01 | 中山市天乙能源有限公司 | A kind of percolate MBR treatment process of garbage incinerating power plant |
| CN110697991A (en) * | 2019-08-26 | 2020-01-17 | 上海交通大学 | Garbage leachate biological treatment process and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206814486U (en) * | 2017-06-22 | 2017-12-29 | 南京环美科技股份有限公司 | A kind of garbage leachate biological denitrification apparatus |
| CN108328871A (en) * | 2018-03-21 | 2018-07-27 | 新疆水木湛清环保科技有限公司 | Landfill leachate efficient denitrification system and its denitrification process |
| CN208869380U (en) * | 2018-09-10 | 2019-05-17 | 上海世渊环保科技有限公司 | A kind of garbage leachate biological denitrification system |
-
2018
- 2018-09-10 CN CN201811050810.2A patent/CN108928923A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206814486U (en) * | 2017-06-22 | 2017-12-29 | 南京环美科技股份有限公司 | A kind of garbage leachate biological denitrification apparatus |
| CN108328871A (en) * | 2018-03-21 | 2018-07-27 | 新疆水木湛清环保科技有限公司 | Landfill leachate efficient denitrification system and its denitrification process |
| CN208869380U (en) * | 2018-09-10 | 2019-05-17 | 上海世渊环保科技有限公司 | A kind of garbage leachate biological denitrification system |
Non-Patent Citations (1)
| Title |
|---|
| 国家鲆鲽类产业技术研发中心: "《国家鲆鲽类产业技术体系年度报告（2011)》", 中国环境科学出版社, pages: 111 - 112 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110294565A (en) * | 2019-04-15 | 2019-10-01 | 中山市天乙能源有限公司 | A kind of percolate MBR treatment process of garbage incinerating power plant |
| CN110294565B (en) * | 2019-04-15 | 2022-09-23 | 中山市天乙能源有限公司 | Leachate MBR treatment process of waste incineration power plant |
| CN110697991A (en) * | 2019-08-26 | 2020-01-17 | 上海交通大学 | Garbage leachate biological treatment process and system |
| CN110697991B (en) * | 2019-08-26 | 2022-05-03 | 上海交通大学 | Garbage leachate biological treatment process and system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109592785B (en) | Anaerobic membrane reactor-partial nitrosation-anaerobic ammonia oxidation combined device and method | |
| CN104944689B (en) | Device for treating high ammonia-nitrogen wastewater and method thereof | |
| CN109250819B (en) | MBR sewage treatment system of degree of depth nitrogen and phosphorus removal | |
| CN106976975A (en) | A kind of rearmounted anoxic strengthens the sewerage advanced treatment process of nitrogen phosphorus ligands | |
| CN105217786B (en) | Based on DEAMOX reinforcing improvement subsection water inflow As2The apparatus and method of/O technique biological carbon and phosphorous removals | |
| CN109052827A (en) | Food waste percolate enhanced processing method and system | |
| CN102674537A (en) | Reversed-order SBR (Sequencing Batch Reactor) water processing device and method for enhanced nitrogen removal | |
| CN108046518A (en) | A kind of apparatus and method of the intensified denitrification and dephosphorization of low-carbon-source sewage | |
| CN101792230A (en) | Non-reflux continuous aeration type sewage treatment system and treatment method | |
| CN112811719A (en) | Autotrophic denitrification treatment system and method for urban sewage | |
| CN104211252B (en) | Percolate short-cut nitrification and denitrification denitrification process | |
| CN107746111A (en) | Automatic circulating formula AO reactors | |
| CN209989143U (en) | Denitrifying phosphorus removal coupling vibration oxygen deficiency MBR device | |
| CN108928923A (en) | A kind of garbage leachate biological denitrification system and method | |
| CN109516551A (en) | A kind of denitrogenation method of anaerobic ammonia oxidation reactor coupling MBR | |
| CN208869380U (en) | A kind of garbage leachate biological denitrification system | |
| CN207313242U (en) | A kind of split reflux declines oxygen denitrification reactor | |
| CN103570131B (en) | Facultative anaerobic type membrane bioreaction integrated sewage treatment equipment | |
| CN109179862A (en) | A kind of multi-stage biological pond+MBR processing system for landfill leachate strengthened denitrification | |
| CN105923767A (en) | Facultative anaerobic membrane bioreactor process and wastewater treatment system | |
| CN204958650U (en) | Hydrolytic acidification -AO - deposits integration reaction tank | |
| CN205328795U (en) | Wet spinning acrylic fibres production polymerization effluent disposal system | |
| CN107381817A (en) | A kind of micro- oxygen denitrification reactor of cavitation-preventive | |
| CN105461163A (en) | Wet spinning acrylic production polymeric wastewater treatment system and treatment method | |
| CN210825614U (en) | （AO）2- -precipitation integrated multistage circulation reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |