CN109485153A - A kind of biofilm reactor and method of wastewater efficient denitrogenation - Google Patents
A kind of biofilm reactor and method of wastewater efficient denitrogenation Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000002351 wastewater Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 51
- 239000000945 filler Substances 0.000 claims abstract description 41
- 206010021143 Hypoxia Diseases 0.000 claims abstract description 38
- 230000007954 hypoxia Effects 0.000 claims abstract description 38
- 239000010865 sewage Substances 0.000 claims abstract description 36
- 239000000835 fiber Substances 0.000 claims abstract description 22
- 238000005276 aerator Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 238000005273 aeration Methods 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 16
- 239000010802 sludge Substances 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000003672 processing method Methods 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 9
- 239000013305 flexible fiber Substances 0.000 claims description 8
- 238000007037 hydroformylation reaction Methods 0.000 claims description 8
- 238000011068 loading method Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 238000005457 optimization Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000005516 engineering process Methods 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000005265 energy consumption Methods 0.000 description 5
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 230000001546 nitrifying effect Effects 0.000 description 3
- 238000005554 pickling Methods 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 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
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003911 water pollution 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
- C02F3/301—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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (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
The invention belongs to technical field of sewage, and in particular to a kind of biofilm reactor and method of wastewater efficient denitrogenation.Comprising: water inlet pipe 1, hypoxia response area 2, aerobic reactor zone 3, outlet pipe 4 and return pipe 5；There are blender 6, limit suspending carrier 7 and decker 8 in hypoxia response area；There are array fiber carrier 9 and aerator 10 in aerobic reactor zone.The invention proposes the small biofilm bio-denitrifying sewage process of a kind of simple process, occupied area and device, solves the problems such as traditional biological denitrification process (AAO) denitrification ability is difficult to further increase, insufficient to utilization of carbon source, process is longer, occupied area is larger and water outlet is difficult to stably reaching standard.And by the filler form and arrangement in optimization hypoxia response area and aerobic reactor zone, reaches and make full use of carbon source, reduce residence time and stable water outlet purpose up to standard.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of biofilm reactor of wastewater efficient denitrogenation and side
Method.
Background technique
With the fast development of Chinese Urbanization's, urban water pollution problem is increasingly serious.At municipal sewage traditional at present
Reason factory can effectively remove the organic pollutants such as COD, but often containing nutrients such as certain density nitrate nitrogen, phosphorus in secondary effluent
Matter, it is difficult to reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) standard level-one A standard (" 15MG-N/
L), if be directly discharged into river and lake, it will cause the risk of water eutrophication.
Widest sewage water denitrification processing technique is the activated sludge denitrification process based on anaerobic-aerobic at present, is led to
It crosses reflux nitrification liquid to hypoxia response area and carries out denitrogenation.But the traditional technology always exists energy consumption height, nitric efficiency is not high, dirty
The problems such as mud expands.In recent years, biofilm reactor is gradually concerned by people, it is considered to be the following most possible substitution passes
The potential technology for activated sludge process of uniting.But, suitable filler how is selected, guarantees filler being uniformly distributed in reactor, really
Guarantor's biomembrane is not easily to fall off, and further decreasing energy consumption etc. is still biofilm reactor critical issue urgently to be solved.
For example, prior art CN1843981A discloses a kind of integrated process for treating sewage by suspended bio-carrier, including
Following steps: the mixed liquor that sanitary sewage or industrial wastewater and rear stage flow back a, enhanced flocculation and sedimentation: is imported into enhanced flocculation
Sedimentation basin, is added flocculant mixing, and the sediment after reaction is discharged through settling zone bottom；B, integrated suspending carrier biological respinse
The biological treatment and separation of solid and liquid of device: suspending carrier biological reaction pool is separated into hypoxia response by perforated retainer or barricade
Area, aerobic reactor zone and solid-liquid displacement zone, each area, which is thrown, suspending carrier biologic packing material, and it is raw that integrated suspending carrier is made in this way
Object reactor；After the clear liquid that step a is obtained successively flows into above three region, solid-liquid displacement zone lower layer exports precipitating sludge, from
The clear water of upper layer discharge is the water for meeting discharge standard.Sewage after coagulating sedimentation is directly entered and is thoroughly mixed reaction by the program
Pond, is only changed to biofilm for the activated sludge process in traditional AAO technique, and the program can not effectively solve biological denitrificaion mistake
The required carbon source problem of journey, while the program does not also carry out vertical division block to filler, fails to make full use of dissolved oxygen and not send out
Wave the maximum function of different biofilm communities.
In addition, prior art CN103359890A discloses the purification side of steel pickling waste liquor after a kind of processing of neutralization precipitation
Method, for removing the total nitrogen in waste water, i.e. nitrate ion content and total hardness, that is, calcium ion content.The method, including in
With the waste water after precipitating by mixed flocculation pond, physico-chemical precipitation pond, pH conditioning tank, anoxic pond, aerobic tank and biochemical sedimentation basin, 30
~50% anoxic pond effluent recycling to mixed flocculation pond, the water outlet of remaining anoxic pond flows into biochemical sedimentation basin.The program is intended to handle
Steel pickling waste liquor, this type waste water and sanitary sewage gap are huge, cannot be adapted to processing sanitary sewage.To sanitary sewage
For, it does not need to carry out pH adjusting, anoxic pond water outlet need to be back to mixed flocculation pond in the program, for sanitary sewage disposal
Journey is also unnecessary, in addition, removal of this scheme mainly for total nitrogen and hardness in steel pickling waste liquor, is not directed to specific
COD minimizing technology and standard, and in sanitary sewage, the removal of COD is one of basic task.
Summary of the invention
In view of the prior art there are problem, the present invention is to be related to a kind of processing of high-efficiency biological denitrification of sewage treatment field
Method and device realizes stable water outlet (" urban wastewater treatment firm pollutant emission mark up to standard using biofilm strengthened denitrification
It is quasi- " level-one A standard in GB18918-2002).
The invention proposes the small biofilm bio-denitrifying sewage process of a kind of simple process, occupied area and device,
Solve traditional biological denitrification process (AAO) denitrification ability is difficult to further increase, insufficient to utilization of carbon source, process is longer,
The problems such as occupied area is larger and water outlet is difficult to stably reaching standard.And it is filled out by optimization hypoxia response area and aerobic reactor zone
Expect form and arrangement, reach and make full use of carbon source, reduces residence time and stable water outlet purpose up to standard.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
Present invention firstly provides a kind of biofilm reactors of wastewater efficient denitrogenation comprising: water inlet pipe 1, anoxic are anti-
Area 2, aerobic reactor zone 3, outlet pipe 4, and connection and return pipe 5 are answered, return pipe is connected in aerobic reactor zone rear end, makes
Reaction solution is back to hypoxia response area；There are blender 6, limit suspending carrier 7 and decker 8 in hypoxia response area；Good
Oxygen reaction zone has array fiber carrier 9 and aerator 10.
As a preferred technical solution of the present invention, anaerobic reaction area is filled using floating stuffing, and with it is with holes every
Plate is separated into multilayer, within a certain area by filler limitation.
As a preferred technical solution of the present invention, the filler is K-3 filler, specific surface area > 800m2/m3, dosing
Rate is up to 60% or more.
As a preferred technical solution of the present invention, aerobic reactor zone array fiber carrier uses flexible fiber filler,
Main material is hydroformylation fiber, and loading density is up to 50m/m3。
As a preferred technical solution of the present invention, aerobic reactor zone array fiber carrier upper and lower ends are separately fixed at
The top and bottom of reactor make it form the array structure of cross-current type with water flow, to make water flow and biomembrane row at one kind
Pulling flow type reactive mode improves treatment effect.
As a preferred technical solution of the present invention, aerobic reactor zone is provided with aerator, is aerated using ladder.
Another object of the present invention is to provide a kind of processing methods of high-efficiency biological denitrification, using aforementioned biological film reaction
Device is used for sewage treatment, and device includes the hypoxia response area and aerobic reactor zone being connected, and fills different types of fill out respectively
Material connects return pipe in aerobic reactor zone rear end, so that nitrification liquid is back to hypoxia response area, reach the mesh of high-efficiency biological denitrification
, while reducing sludge yield.
A kind of processing method of high-efficiency biological denitrification of specific processing method is used for sewage using aforementioned biological membrane reactor
Processing, comprising: (1) sewage enters hypoxia response area from water inlet pipe, and anaerobic reaction area is using floating stuffing filling, and with holes
Partition is separated into multilayer, within a certain area by filler limitation, realizes and forms different biocoene controls in different zones
Biomembrane, and churned mechanically mode is used, guarantee that filler is evenly distributed in the area；
(2) sewage enters aerobic reactor zone after the processing of hypoxia response area, and aerobic reactor zone uses flexible fiber filler, main
Wanting material is hydroformylation fiber, and loading density is up to 50m/m3；Its upper and lower ends is separately fixed to the top and bottom of reactor,
It is set to form the array structure of cross-current type with water flow, to make water flow and biomembrane row at a kind of pulling flow type reactive mode.
As a preferred technical solution of the present invention, which is K-3 filler, specific surface area >
800m2/m3, for dosing rate up to 60% or more, process sludge concentration can reach > 3000mg/L, hydraulic detention time about 1-2h.
As a preferred technical solution of the present invention, step (2) aerobic reactor zone uses flexible fiber filler, main material
Matter is hydroformylation fiber, and loading density is up to 50m/m3.Its upper and lower ends is separately fixed to the top and bottom of reactor, makes it
The array structure of cross-current type is formed with water flow, to make water flow and biomembrane row at a kind of pulling flow type reactive mode, raising processing
Effect.
As a preferred technical solution of the present invention, step (2) aerobic reactor zone (preferably will be aerobic using ladder aeration
Three different aeration intensity regions are divided into, aeration intensity successively successively decreases, and maintaining dissolved oxygen concentration in first area is 2-
2.5mg/L, dissolved oxygen concentration is 1.5-2mg/L in second area, and third is dissolved as 1.0-1.5mg/L in region), i.e., along water flow
Direction gradually decreases aeration quantity, can make full use of dissolved oxygen, so that the energy consumption in treatment process is reduced, the process sludge concentration
It can reach > 4000mg/L, hydraulic detention time about 3-4h.
As a preferred technical solution of the present invention, return pipe is connected in aerobic reactor zone rear end, reaction solution is made to flow back
To hypoxia response area, by regulating and controlling effluent recycling ratio, preferably regulation mixed liquid recycle ratio 100-400% is dense according to influent ammonia nitrogen
Degree and Effluent criteria make to be discharged total nitrogen stably reaching standard, achieve the purpose that efficient denitrification.Due to using high-performance bio embrane method, through locating
The water outlet of reason does not need secondary settling tank, can be directly discharged into natural water, reduce occupied area.
The invention is mainly used in water-treatment technology field, is related to biofilm reactor and the side of a kind of wastewater efficient denitrogenation
Method.Main advantages of the present invention include:
(1) filler distribution is uniform, and aeration energy consumption is low；(2) denitrogenation stability and high efficiency, later maintenance are simple；(3) mud-water separation is held
Easily, secondary settling tank is not needed；(4) processing equipment modularization, easily transport assembling；(5) processing equipment land occupation is few, and cost of investment is low；(6)
It is wide to handle water range, it is large, medium and small.
The present invention has following beneficial effect outstanding compared with the existing technology, comprising:
1. effluent quality of the present invention is high, it can be achieved that the removal rate of sewage total nitrogen reaches 80%, water outlet total nitrogen concentration is lower than
10mg/L meets the sewage drainage standard of level-one A.
2. being layered in hypoxia response area by filler, using limit suspending carrier technology, treatment effect and carbon source benefit are improved
With rate.
3. using array fiber carrier technology in aerobic reactor zone, realize that pulling flow type processing mode improves treatment effect, and
Implement ladder aeration and improve dissolution oxygen utilization rate, reduces processing energy consumption.
It 4. the present apparatus can be used alone, can also be used with other process combinations, and integration can be formed by simple assembling
Equipment realizes the efficient whole process processing of sewage.Easy to operate, occupied area is small, and capital construction, operation and maintenance cost are low.
Detailed description of the invention
Fig. 1, the biofilm reactor diagrammatic cross-section of wastewater efficient denitrogenation provided by the invention.
Specific embodiment
With reference to the accompanying drawing, a specific embodiment of the invention is described further, but the present invention is not limited to this:
A kind of biofilm reactor of the wastewater efficient denitrogenation of embodiment 1
As shown in Figure 1, a kind of biofilm reactor of wastewater efficient denitrogenation comprising: water inlet pipe 1, hypoxia response area 2,
Aerobic reactor zone 3, outlet pipe 4, and connection and return pipe 5 connect return pipe in aerobic reactor zone rear end, make reaction solution
It is back to hypoxia response area；There are blender 6, limit suspending carrier 7 and decker 8 in hypoxia response area；In aerobic reaction
There are array fiber carrier 9 and aerator 10 in area.
Wherein, anaerobic reaction area is filled using floating stuffing, and is separated into multilayer with partition with holes, and filler is limited
Within a certain area.
Wherein, aerobic reactor zone array fiber carrier upper and lower ends are separately fixed at the top and bottom of reactor, make it
The array structure of cross-current type is formed with water flow, to make water flow and biomembrane row at a kind of pulling flow type reactive mode.
A kind of biofilm reactor of the wastewater efficient denitrogenation of embodiment 2
On the basis of embodiment 1, anaerobic reaction area is filled using floating stuffing, and is separated into multilayer with partition with holes
(3-5 layers), filler described in anaerobic reaction area are K-3 filler, specific surface area > 800m2/m3, dosing rate is up to 60% or more.
Aerobic reactor zone array fiber carrier uses the main material of flexible fiber filler for hydroformylation fiber, and loading density is reachable
50m/m3。
Aerobic reactor zone bottom is provided with aerator, is aerated using ladder, divides into three different aerations for aerobic
Intensity area.
Embodiment 3
A kind of processing method of high-efficiency biological denitrification, using 2 biofilm reactor of previous embodiment at sanitary sewage
Reason, comprising:
(1) sewage enters hypoxia response area from water inlet pipe, and hypoxia response area is filled using floating stuffing, and with it is with holes every
Plate is separated into 5 layers, within a certain area by filler limitation, realizes the biology that different biocoene controls are formed in different zones
Film, and churned mechanically mode is used, guarantee that filler is evenly distributed in the area；
(2) sewage enters aerobic reactor zone after the processing of hypoxia response area, and aerobic reactor zone uses flexible fiber filler, main
Wanting material is hydroformylation fiber, and loading density is up to 50m/m3；Its upper and lower ends is separately fixed to the top and bottom of reactor,
It is set to form the array structure of cross-current type with water flow, to make water flow and biomembrane row at a kind of pulling flow type reactive mode.
Wherein, step (1) process sludge concentration can reach > 3000mg/L, hydraulic detention time about 2h.
Three different aeration intensity regions, aeration (are divided into for aerobic using ladder aeration in step (2) aerobic reactor zone
Intensity is successively successively decreased, and maintaining dissolved oxygen concentration in first area is 2.5mg/L, and dissolved oxygen concentration is 2mg/L in second area, the
1.5mg/L is dissolved as in three regions), which can reach > 4000mg/L, hydraulic detention time about 4h.
Return pipe is connected in aerobic reactor zone rear end, so that reaction solution is back to hypoxia response area, by regulating and controlling effluent recycling
Than regulating and controlling mixed liquid recycle ratio 400%.
Embodiment 4
A kind of processing method of high-efficiency biological denitrification, using 2 biofilm reactor of previous embodiment at sanitary sewage
Reason, comprising:
(1) sewage enters hypoxia response area from water inlet pipe, and hypoxia response area is filled using floating stuffing, and with it is with holes every
Plate is separated into 3 layers, within a certain area by filler limitation, realizes the biology that different biocoene controls are formed in different zones
Film, and churned mechanically mode is used, guarantee that filler is evenly distributed in the area；
(2) sewage enters aerobic reactor zone after the processing of hypoxia response area, and aerobic reactor zone uses flexible fiber filler, main
Wanting material is hydroformylation fiber, and loading density is up to 50m/m3；Its upper and lower ends is separately fixed to the top and bottom of reactor,
It is set to form the array structure of cross-current type with water flow, to make water flow and biomembrane row at a kind of pulling flow type reactive mode.
Wherein, step (1) process sludge concentration can reach > 3000mg/L, hydraulic detention time about 1h.
Three different aeration intensity regions, aeration (are divided into for aerobic using ladder aeration in step (2) aerobic reactor zone
Intensity is successively successively decreased, and maintaining dissolved oxygen concentration in first area is 2mg/L, and dissolved oxygen concentration is 1.5mg/L in second area, the
1.0mg/L is dissolved as in three regions), which can reach > 4000mg/L, hydraulic detention time about 3h.
Return pipe is connected in aerobic reactor zone rear end, so that reaction solution is back to hypoxia response area, by regulating and controlling effluent recycling
Than regulating and controlling mixed liquid recycle ratio 200%.
Comparative example 1
Using water inlet pipe 1, hypoxia response area 2, aerobic reactor zone 3, outlet pipe 4, and the reactor of connection, do not have aforementioned
Filler setting and location layout.
Sewage enters in conversion zone by water inlet pipe, and conversion zone is divided into hypoxia response area and aerobic reactor zone, if should
Filler is free of in region, then cannot achieve the efficient process effect of pulling flow type in differential responses region to be thoroughly mixed formula reaction
Fruit, water outlet can not stably reaching standards.
Meanwhile the program does not have the higher ability for resisting impact load, and sludge is easy to produce in the process of running
Various problems, while a large amount of biological sludge can be generated, it needs to carry out subsequent Treatment of Sludge, increases operating cost.
Comparative example 2
Sanitary sewage enters in conversion zone by water inlet pipe, and conversion zone is divided into hypoxia response area and aerobic reactor zone,
Contain floating stuffing in anoxic zones, while containing fiberfill in aerobic region, but subregion is not carried out to filler, sewage exists
It is thoroughly mixed in conversion zone.
Though the program uses filler, reduce sludge yield, subregion is not carried out to filler, the internal carbon source benefit in anoxic zone
Still it is lower than embodiment 3 and 4 with rate, due to being for handling low carbon-nitrogen ratio sewage, treatment effect can not stably reaching standard.Exist simultaneously
In aerobic region, it is not also able to achieve the pulling flow type method of operation, treatment effect is not so good as embodiment 3 and 4.
5 effect measuring of embodiment
Using the device of embodiment 1 and the processing method of embodiment 3:
Firstly, sewage enters high-efficiency biological denitrification device by water inlet pipe 1 after pre-processing (coagulation+precipitating etc.),
It mixes in hypoxia response area 2 with the nitrification liquid of reflux, in the process since denitrification process is preposition, can make full use of
Carbon source in water inlet, nitrification liquid complete nitrifying process by reflux.It, can by suspension biological vector 7 in hypoxia response area
Biomass and denitrification efficiency are improved, while being realized vertical filler layering (limit suspending carrier technology) by decker 8, and
The suspension of filler is realized by blender 6, this technology can guarantee in differential responses region, due to different flow conditions, no
Same polluter load etc., forms the microorganism major community biomembrane of different function, to realize the height of denitrification process
Imitate stabilization function.
Hereafter, enter aerobic reactor zone 3 from the water flow that hypoxia response area 2 is flowed out, complete nitrifying process in this area.?
In aerobic reactor zone, the biofilm of pulling flow type reaction is realized by fixed fiber carrier 9 (array fiber carrier technology)
Nitrifying process improves nitrification effect.Unlike traditional biological embrane method, this technology fiber carrier by the way of fixed, from
And water flow mode is made to be changed to pulling flow type by being thoroughly mixed formula.And by aerator 10, the mode for taking ladder to be aerated is saved
Aeration quantity makes full use of dissolved oxygen, realizes the efficient low-consume function of nitrification processing process.
Finally, nitrification liquid is back to hypoxia response area 2 and carries out denitrification by return pipe 5, it, can by regulating and controlling reflux ratio
To realize removal rate > 80% that sewage total nitrogen can be achieved.Water outlet is discharged by outlet pipe 4, and water outlet total nitrogen concentration is lower than
10mg/L meets level-one emission standard A.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (8)
1. a kind of biofilm reactor of wastewater efficient denitrogenation characterized by comprising water inlet pipe 1, hypoxia response area 2, aerobic
Reaction zone 3, outlet pipe 4, and connection and return pipe 5 connect return pipe in aerobic reactor zone rear end, reaction solution are made to flow back
To hypoxia response area；There are blender 6, limit suspending carrier 7 and decker 8 in hypoxia response area；Have in aerobic reactor zone
Array fiber carrier 9 and aerator 10.
2. a kind of biofilm reactor of wastewater efficient denitrogenation according to claim 1, which is characterized in that anaerobic reaction area
It is filled using floating stuffing, and is separated into multilayer with partition with holes, within a certain area by filler limitation；The filler is
K-3 filler, specific surface area > 800m2/m3, dosing rate is up to 60% or more.
3. a kind of biofilm reactor of wastewater efficient denitrogenation according to claim 1, which is characterized in that aerobic reactor zone
Array fiber carrier uses flexible fiber filler, and main material is hydroformylation fiber, and loading density is up to 50m/m3；Aerobic reactor zone
Array fiber carrier upper and lower ends are separately fixed at the top and bottom of reactor, it is made to form the array junctions of cross-current type with water flow
Structure improves treatment effect to make water flow and biomembrane row at a kind of pulling flow type reactive mode.
4. a kind of biofilm reactor of wastewater efficient denitrogenation according to claim 1, which is characterized in that aerobic reactor zone
It is provided with aerator, is aerated using ladder.
5. a kind of processing method of high-efficiency biological denitrification, which is characterized in that use preceding claims 1-4 described in any item one
The biofilm reactor of kind wastewater efficient denitrogenation, comprising:
(1) sewage enters hypoxia response area from water inlet pipe, and anaerobic reaction area is filled using floating stuffing, and is divided with partition with holes
It is divided into multilayer, within a certain area by filler limitation, realizes the biomembrane for forming different biocoene controls in different zones,
And churned mechanically mode is used, guarantee that filler is evenly distributed in the area；
(2) sewage enters aerobic reactor zone after the processing of hypoxia response area, and aerobic reactor zone uses flexible fiber filler, main material
Matter is hydroformylation fiber, and loading density is up to 50m/m3；Its upper and lower ends is separately fixed to the top and bottom of reactor, makes it
The array structure of cross-current type is formed with water flow, to make water flow and biomembrane row at a kind of pulling flow type reactive mode.
6. processing method according to claim 5, which is characterized in that filler is K-3 filler during step (1), compares table
Area > 800m2/m3, for dosing rate up to 60% or more, process sludge concentration can reach > 3000mg/L, hydraulic detention time about 1-
2h；It is preferred that revolving speed about 80-120r/min.
7. processing method according to claim 5, which is characterized in that step (2) aerobic reactor zone is aerated using ladder,
Three different aeration intensity regions are divided by aerobic, aeration intensity successively successively decreases, and maintains dissolved oxygen concentration in first area
For 2-2.5mg/L, dissolved oxygen concentration is 1.5-2mg/L in second area, and third is dissolved as 1.0-1.5mg/L in region, the mistake
Journey sludge concentration can reach > 4000mg/L, hydraulic detention time about 3-4h.
8. processing method according to claim 5, which is characterized in that connect return pipe in aerobic reactor zone rear end, make anti-
Liquid is answered to be back to hypoxia response area, regulation mixed liquid recycle ratio 100-400% is reached according to influent ammonium concentration and Effluent criteria
To the purpose of efficient denitrification.
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| CN112777745A (en) * | 2021-01-28 | 2021-05-11 | 苏州科技大学 | Full-film biological sewage denitrification treatment device and biological sewage denitrification treatment method |
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