CN106630137A - Treatment method for removing total nitrogen in sewage by MBBR (moving-bed biofilm reactor) process - Google Patents
Treatment method for removing total nitrogen in sewage by MBBR (moving-bed biofilm reactor) process Download PDFInfo
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- CN106630137A CN106630137A CN201710035622.1A CN201710035622A CN106630137A CN 106630137 A CN106630137 A CN 106630137A CN 201710035622 A CN201710035622 A CN 201710035622A CN 106630137 A CN106630137 A CN 106630137A
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- sewage
- pond
- packing material
- anoxic pond
- biologic packing
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Classifications
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- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
Abstract
The invention relates to a treatment method for removing total nitrogen in sewage by an MBBR (moving-bed biofilm reactor) process. The treatment method is characterized by mainly including the steps: 1 discharging the sewage into a pretreatment unit; 2 discharging the pretreated sewage into a distributing trench; 3 discharging the sewage into an anaerobic tank or directly enabling the sewage to enter an anoxic tank; 4 throwing biological stuffing into the anoxic tank; 5 stirring the sewage in the anoxic tank by a surface suction stirrer; 6 enabling the sewage after nitrogen removal and phosphorus absorption treatment in the anoxic tank to enter an aerobic biochemical tank through water outlet holes and performing biochemical reaction. The method has the advantages that MBBR stuffing is thrown into the anoxic tank and stirred by the surface suction stirrer, and total nitrogen in effluent is less than or equal to 10mg/l.
Description
Technical field
The invention belongs to technical field of sewage, and in particular to a kind of employing MBBR techniques remove the place of total nitrogen in sewage
Reason method.
Background technology
In the prior art, anoxic pond, in denitrification process, acts primarily as the effect that denitrification removes nitrate nitrogen, while going
Except part BOD5.
Improve anoxic pond and remove total nitrogen ability, typically take expansion pond to hold, increase sludge concentration or increase denitrification bacterium number
Amount method.MBBR (MOVING BED BIOFILM REACTOR- MBBRs) can be added in nitrogen stress pond
Filler, increases the quantity of denitrifying bacterium.
MBBR technologies are widely used in Aerobic Pond, because there is enough aeration intensities, it is to avoid filler blockage problem.
MBBR fillers are invested in anaerobic pond or anoxic pond and but seldom apply, and MBBR fillers are added in nitrogen stress pond, can be with
Increase the quantity of denitrifying bacterium.Total nitrogen ability is removed so as to improve anoxic pond.
Existing anoxic pond agitating mode is to install common submersible agitator in bottom of pond, by stirring water body, make filler with
Water mixing, but general mixer is in the pond body of MBBR fillers, it may appear that and filler is damaged and filler is piled up, and mixes uneven
Phenomenon.
For example, Chinese Patent Application No. CN201210529069 discloses a kind of MBR sewage water treatment methods of strengthened denitrification,
It is characterized in that：Carry out according to the following steps：(1) through pretreatment town sewage together with 300%～400% backflow precipitate
Pond sludge and 200%～400% backflow membrane cisterna nitrification liquid together enter anoxic pond, and denitrifying bacterium will using the carbon source in sewage
The nitrate-nitrogen reduction that backflow is brought into is nitrogen；(2) anoxic pond go out stream together with backflow membrane cisterna nitrification liquid together enter into sedimentation basin
Row mud-water separation, the sludge part for precipitating is back to anoxic pond, remaining mud discharging；(3) sedimentation basin goes out stream and enters film
Pond is nitrified, and is nitrate nitrogen by ammonium oxidation, and membrane cisterna is by pump from film silk intermittent suction water outlet, Chinese effluent or reuse.
Again for example, Chinese Patent Application No. discloses a kind of MBBR techniques of Treating Municipal Sewage for CN201510574177
Method, in the MBBR processes by MBBR processing systems, the system is by anaerobic zone, aerobic zone and anoxic zone for its feature
Composition is sequentially connected, the anaerobic zone and anoxic zone are equipped with agitating device, and anaerobic zone one end connects intake pool by pipeline, lacks
The water outlet of oxygen area enters second pond, and the sludge outlet of second pond connects anaerobic pond by sludge return pipe；Aerobic zone contains body surface
Face is attached with nitrobacteria, while there are activated sludge, concretely comprises the following steps：(1) municipal sewage through coagulation passes through
Intake pool enters the anaerobic zone of MBBR processing systems, in the stirring action that anaerobic zone passes through agitating device, reaches municipal sludge
It is thoroughly mixed state；Mainly Denitrifying Phosphate Accumulating Organisms anaerobic phosphorus release is carried out to municipal sludge in anaerobic zone, while making part organic
Thing is removed by activated sludge absorption；(2) sewage Jing after the process of anaerobic zone enters aerobic zone, and sewage is attached in aerobic zone carrier surface
Nitrification is carried out under the nitrobacteria effect, is nitrite nitrogen and nitrate nitrogen, water outlet mineralized nitrogen；(3) Jing aerobic zones
Sewage after process enters anoxic zone, and in the stirring action of agitating device the state of being thoroughly mixed is issued to, and Denitrifying Phosphate Accumulating Organisms exist
This stage carries out denitrification denitrogenation and inhales phosphorus, completes denitrogenation dephosphorizing；(4) sewage Jing after the process of anoxic zone, into second pond, Jing is quiet
Put and discharged after precipitation.
The defect that above-mentioned patented technology is present is complex process, and the nitrogen-removing rate of sewage is low, makes in anaerobic zone or anaerobic pond
Traditional agitating device, filler is easily damaged, filler packing phenomenon.
China's current《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002) will improve to ground Table IV
Class water standard.Wherein water outlet is improved to total nitrogen index request.Water outlet total nitrogen is promoted to 10mg/l from one-level A 15mg/l.
State owned land resource scarcity, part of contaminated water treatment plant is without the newly-built sewage treatment facility of occupation of land.A kind of economy of offer,
Efficiently, the little sewage disposal technology of energy-conservation, floor space can meet water outlet and reach emission request.Especially to Transformation of Sewage Treatment item
Mesh is more urgent.
The content of the invention
Present invention aim to overcome that problems of the prior art, there is provided one kind is removed in sewage using MBBR techniques
The processing method of total nitrogen.
The processing method is comprised the following steps that：
Methods described process sewage can be city domestic sewage, industrial wastewater, the sewage that water outlet total nitrogen is required.It is dirty
Water flow to anaerobic zone-anoxic zone-aerobic zone after pretreatment, and by second pond mud-water separation, and the dirt of second pond are carried out
Mud carries out being partly refluxed to anoxic zone, excess sludge periodic exhaustion.Secondary clarifier effluent to back segment process, final qualified discharge or return
With.
A kind of employing MBBR techniques of the present invention remove the processing method of total nitrogen in sewage, it is characterised in that the side
Method adopts following steps：
Step 1, by sewage pretreatment unit is entered, and after the process of grid and setting pot, removes the suspension in sewage
Thing；
Step 2, will enter distributing channel through pretreated sewage, and the grid of grid gap 1mm is provided with distributing channel, be gone
Fiber substance and hair in eliminating water, it is to avoid the MBBR fillers to adding cause dirty stifled and hardened；
Step 3, requires according to the sewage disposal of distributing channel, and sewage is entered into anaerobic pond or anoxic pond is directly entered；
Step 4, throws in growth, the life of the HDPE materials containing hydrophilic composition of internal suitable denitrifying bacterium in anoxic pond
Thing filler；The grid or screen cloth for preventing the biologic packing material from revealing is respectively provided with the inlet opening of anoxic pond and apopore；
Step 5, is stirred using table suction agitator to sewage in anoxic pond, and the denitrifying bacterium in sewage is attracted to
Carrier surface, formed organic matter thin layer, microorganism to the biologic packing material surface migration, meanwhile, the biologic packing material surface is attached
The continuous growth and breeding of microorganism, forms biomembrane, absorbs the organic pollution in degraded sewage, and biomembrane is in biologic packing material
Surface formed, with biodeterioration, biomembrane constantly comes off, regenerates, updates, realize sewage denitrogenation inhale phosphorus；
Step 6, will inhale the sewage that phosphorus is processed in anoxic pond through denitrogenation, and by apopore aerobic biochemical pool is entered, and carry out
Biochemical reaction, BOD5, the COD and ammonia nitrogen further degraded in sewage；BOD5, the COD and ammonia degraded when Aerobic Pond in sewage
Nitrogen content is not up to sewage drainage standard, is further continued for adding the biologic packing material of HDPE materials, carries out subsequent step 4-6；
Step 7, by the Aerobic Pond sewage processed through step 6, enters second pond, carries out separation of solid and liquid, and clear water is from water outlet
Groove to rear end, the sludge part for depositing are pumped to front end anoxic pond by backflow, and another part excess sludge drains into dirt
Mud processing meanss.
Further, grid described in step 1 is mesh-structured water inlet screen cloth, and the aperture of mesh is 5～10mm.
Further, the floating stuffing specific surface area of biologic packing material described in step 4>500m2/m3, proportion be 0.96～
0.98kg/L, media-filling rate is 20%～45%, and filler is made up of 4 concentric tubes, and inside is dividing wall, and outer surface is in ripple
Shape, into " honeycomb " shape, most inner lane is circle to lattice, and intermediate layer forms 6 chambers by 6 next doors between inner tube and middle ring, outward
Layer forms 12 compartments by intervalve and outer corrugations ring, and also containing 12 equidistant short ribs, nominal diameter is 25 ± 2mm, public
Length is called 10 ± 1mm.
Further, the table suction agitator that step 5 is used includes orienting locator, connecting portion, outside guide shell
And agitating device, outside guide shell is fixed on guide-localization frame by connecting portion, and agitator is built in outside guide shell；Outward
Portion guide shell upper end is input, and outside guide shell lower end is output end.
Further, the stirring intensity of agitator described in step 5 is 5～10W/m3Sewage.
Further, step 4 is stated in anoxic pond after the biologic packing material of HDPE materials of the input containing hydrophilic composition, table suction
When agitator works, the filler on sewage and top layer is entered in outside guide shell by input, the stirring in outside guide shell
In the presence of device, filler is exported to cesspool bottom so that the biologic packing material is uniformly distributed, it is to avoid cause filler to pile up.
Further, further, the grid is set for mesh at the inlet opening of anoxic pond described in step 4 and apopore
The water inlet screen cloth of structure, the aperture of mesh is 5～10mm.
Further, the stirring intensity that table suction agitator described in step 5 is stirred is 5～10W/m3Sewage, table is inhaled
The outside guide shell that formula agitator is arranged can increase the internal circulating load of filler, and not result in the broken of filler, the table suction
The stirring intensity that agitator is stirred is 5～10W/m3Sewage, the outside guide shell that table suction agitator is arranged can increase to be filled out
The internal circulating load of material, and do not result in the broken of filler.
The superior effect of the method for the invention is：
1, using the method for the invention, 12 DEG C of denitrification rates can be from conventional activated sludge method 0.03kgNO3-N/
(MLVSS.d) it is promoted to 0.08kgNO3-N/ (MLVSS.d) and compares conventional anoxic pond, take up an area and reduce one times, reduces investment outlay and transport
Row expense.
2, experiment pilot-plant in, when not adding MBBR fillers, sedimentation basin water outlet total nitrogen be 15mg/l, anoxic pond 12
DEG C denitrification rate is 0.03kgNO3-N/ (MLVSS.d), and sludge concentration MLVSS is 3.5g/l, using MBBR of the present invention
Filler and after being sufficiently stirred for using table suction agitator, was not increased on the premise of anoxic pond pond holds, through 30 cycles (30
My god) after, sedimentation basin water outlet total nitrogen maintains below 10mg/l, and 12 DEG C of denitrification rates of anoxic pond are 0.08kgNO3-N/
(MLVSS.d)。
3, using table suction agitator of the present invention stirring anoxic pond in MBBR fillers, do not occur MBBR fillers pile up or
Fragmentation Phenomena.
4, by adding MBBR fillers in anoxic pond, and filled out using the MBBR in table suction agitator stirring anoxic pond
Material, water outlet total nitrogen is met less than or equal to 10mg/l's《Urban wastewater treatment firm pollutant emission standard》(GB18918-2002)
Ground Table IV class water standard.
Specific embodiment
The method of the invention specific embodiment is described in further detail below.
The treating method comprises following steps：
Step 1, by sewage pretreatment unit is entered, and after the process of grid and setting pot, removes the suspension in sewage
Thing；
Step 2, will enter distributing channel through pretreated sewage, and the grid of grid gap 1mm is provided with distributing channel, be gone
Fiber substance and hair in eliminating water, it is to avoid the MBBR fillers to adding cause dirty stifled and hardened；
Step 3, requires according to the sewage disposal of distributing channel, and sewage is entered into anaerobic pond or anoxic pond is directly entered；
Step 4, throws in growth, the life of the HDPE materials containing hydrophilic composition of internal suitable denitrifying bacterium in anoxic pond
Thing filler；The grid or screen cloth for preventing the biologic packing material from revealing is respectively provided with the inlet opening of anoxic pond and apopore；
Step 5, is stirred using table suction agitator to sewage in anoxic pond, and the denitrifying bacterium in sewage is attracted to
Carrier surface, formed organic matter thin layer, microorganism to the biologic packing material surface migration, meanwhile, the biologic packing material surface is attached
The continuous growth and breeding of microorganism, forms biomembrane, absorbs the organic pollution in degraded sewage, and biomembrane is in biologic packing material
Surface formed, with biodeterioration, biomembrane constantly comes off, regenerates, updates, realize sewage denitrogenation inhale phosphorus；
Step 6, will inhale the sewage that phosphorus is processed in anoxic pond through denitrogenation, and by apopore aerobic biochemical pool is entered, and carry out
Biochemical reaction, BOD5, the COD and ammonia nitrogen further degraded in sewage；BOD5, the COD and ammonia degraded when Aerobic Pond in sewage
Nitrogen content is not up to sewage drainage standard, is further continued for adding the biologic packing material of HDPE materials, carries out subsequent step 4-6；
Step 7, by the Aerobic Pond sewage processed through step 6, enters second pond, carries out separation of solid and liquid, and clear water is from water outlet
Groove to rear end, the sludge part for depositing are pumped to front end anoxic pond by backflow, and another part excess sludge drains into dirt
Mud processing meanss.
Further, grid described in step 1 is mesh-structured water inlet screen cloth, and the aperture of mesh is 5～10mm.
Further, the floating stuffing specific surface area of biologic packing material described in step 4>500m2/m3, proportion be 0.96～
0.98kg/L, media-filling rate is 20%～45%, and filler is made up of 4 concentric tubes, and inside is dividing wall, and outer surface is in ripple
Shape, into " honeycomb " shape, most inner lane is circle to lattice, and intermediate layer forms 6 chambers by 6 next doors between inner tube and middle ring, outward
Layer forms 12 compartments by intervalve and outer corrugations ring, and also containing 12 equidistant short ribs, nominal diameter is 25 ± 2mm, public
Length is called 10 ± 1mm.
Further, in anoxic pond described in step 4 after the biologic packing material of HDPE materials of the input containing hydrophilic composition, table is inhaled
When formula agitator works, the filler on sewage and top layer is entered in outside guide shell by input, stirring in outside guide shell
In the presence of mixing device, filler is exported to cesspool bottom so that the biologic packing material is uniformly distributed, it is to avoid cause filler to pile up.
Further, it is mesh-structured to enter that the grid is arranged at the inlet opening of anoxic pond described in step 4 and apopore
Water sieve net, the aperture of mesh is 5～10mm.
Further, step 5 using the table suction agitator include orienting locator, connecting portion, outside guide shell and
Agitating device, outside guide shell is fixed on guide-localization frame by connecting portion, and agitator is built in outside guide shell, outside
Guide shell upper end is input, and outside guide shell lower end is output end.
Further, the stirring intensity that table suction agitator described in step 5 is stirred is 5～10W/m3Sewage, table is inhaled
The outside guide shell that formula agitator is arranged can increase the internal circulating load of filler, and not result in the broken of filler.
Further, put into again in step 6 after the biologic packing material, when table suction agitator works, sewage and top layer
Described filler is entered in outside guide shell by input, in the presence of the agitator in outside guide shell, filler export to
Cesspool bottom, is uniformly distributed the biologic packing material.
The present invention is not limited to above-mentioned embodiment, in the case of the flesh and blood without departing substantially from the present invention, this area skill
Any deformation that art personnel are contemplated that, improvement, replacement each fall within protection scope of the present invention.
Claims (7)
1. a kind of employing MBBR techniques remove the processing method of total nitrogen in sewage, it is characterised in that methods described includes following step
Suddenly：
Step 1, by sewage pretreatment unit is entered, and after the process of grid and setting pot, removes the suspension in sewage；
Step 2, will enter distributing channel through pretreated sewage, and the grid of grid gap 1mm is provided with distributing channel, be removed water
In fiber substance and hair, it is to avoid the MBBR fillers to adding cause dirty stifled and hardened；
Step 3, requires according to the sewage disposal of distributing channel, and sewage is entered into anaerobic pond or anoxic pond is directly entered；
Step 4, the growth of internal suitable denitrifying bacterium, the biology of the HDPE materials containing hydrophilic composition is thrown in anoxic pond and is filled out
Material；The grid or screen cloth for preventing the biologic packing material from revealing is respectively provided with the inlet opening of anoxic pond and apopore；
Step 5, is stirred using table suction agitator to sewage in anoxic pond, and the denitrifying bacterium in sewage is attracted to carrier
Surface, formed organic matter thin layer, microorganism to the biologic packing material surface migration, meanwhile, the biologic packing material surface attachment
The continuous growth and breeding of microorganism, forms biomembrane, absorbs the organic pollution in degraded sewage, table of the biomembrane in biologic packing material
Face is formed, and with biodeterioration, biomembrane constantly comes off, regenerates, updates, and phosphorus is inhaled in the denitrogenation for realizing sewage；
Step 6, will inhale the sewage that phosphorus is processed in anoxic pond through denitrogenation, and by apopore aerobic biochemical pool is entered, and carry out biochemistry
Reaction, BOD5, the COD and ammonia nitrogen further degraded in sewage；When BOD5, COD and ammonia nitrogen that Aerobic Pond is degraded in sewage contain
Amount is not up to sewage drainage standard, is further continued for adding the biologic packing material of HDPE materials, carries out subsequent step 4-6；
Step 7, by the Aerobic Pond sewage processed through step 6, enters second pond, carries out separation of solid and liquid, clear water from effluent trough to
Rear end, the sludge part for depositing is pumped to front end anoxic pond by backflow, and another part excess sludge is drained at sludge
Reason device.
2. according to claim 1 methods described, it is characterised in that grid described in step 1 is mesh-structured water inlet screen cloth, described
The aperture of the mesh of screen cloth is 5～10mm.
3. according to claim 1 methods described, it is characterised in that the floating stuffing specific surface area of biologic packing material described in step 4>
500m2/m3, proportion is 0.96～0.98kg/L, and media-filling rate is 20%～45%, and filler is made up of 4 concentric tubes, internal
For dividing wall, outer surface is corrugated, and into " honeycomb " shape, most inner lane is circle to lattice, and intermediate layer is by between inner tube and middle ring
6 next doors formed 6 chambers, outer layer forms 12 compartments by intervalve and outer corrugations ring, also containing 12 equidistant short ribs,
Nominal diameter is 25 ± 2mm, and nominal length is 10 ± 1mm.
4. according to claim 1 methods described, it is characterised in that input contains hydrophilic composition in anoxic pond described in step 4
After the biologic packing material of HDPE materials, when table suction agitator works, the filler on sewage and top layer is led by input into outside
In flow cartridge, in the presence of the agitator in outside guide shell, filler is exported to cesspool bottom so that the biologic packing material is equal
Even distribution, it is to avoid cause filler to pile up.
5. according to claim 1 methods described, it is characterised in that further, the inlet opening of anoxic pond described in step 4 and water outlet
It is mesh-structured water inlet screen cloth that the grid is arranged at hole, and the aperture of mesh is 5～10mm.
6. according to claim 1 methods described, it is characterised in that table suction agitator described in step 5 includes orienting locator, connects
Socket part, outside guide shell and agitating device, the orienting locator is arranged in treatment tank, and outside guide shell is by connection
Portion is fixed on guide-localization frame, and agitator is built in outside guide shell；Outside guide shell upper end be input, outside water conservancy diversion
Cylinder lower end is output end.
7. according to claim 1 methods described, it is characterised in that the stirring intensity of agitator described in step 5 is 5～10W/m3It is dirty
Water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035622.1A CN106630137A (en) | 2017-01-17 | 2017-01-17 | Treatment method for removing total nitrogen in sewage by MBBR (moving-bed biofilm reactor) process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710035622.1A CN106630137A (en) | 2017-01-17 | 2017-01-17 | Treatment method for removing total nitrogen in sewage by MBBR (moving-bed biofilm reactor) process |
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| CN106630137A true CN106630137A (en) | 2017-05-10 |
Family
ID=58841869
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| CN201710035622.1A Pending CN106630137A (en) | 2017-01-17 | 2017-01-17 | Treatment method for removing total nitrogen in sewage by MBBR (moving-bed biofilm reactor) process |
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Cited By (3)
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| CN107055787A (en) * | 2017-06-25 | 2017-08-18 | 云南傲远环保科技有限公司 | A20+MBR processing units |
| CN108557998A (en) * | 2018-04-16 | 2018-09-21 | 临邑禹王植物蛋白有限公司 | A kind of method of total nitrogen in removal whey wastewater |
| CN110734130A (en) * | 2018-07-18 | 2020-01-31 | 光大水务（深圳）有限公司 | Anaerobic/anoxic pond based on IFAS/MBBR technology |
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| CN110734130A (en) * | 2018-07-18 | 2020-01-31 | 光大水务（深圳）有限公司 | Anaerobic/anoxic pond based on IFAS/MBBR technology |
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Application publication date: 20170510 |