CN106995238A - The method and immobilization bioreactor of ammonia nitrogen in a kind of processing waste water - Google Patents
The method and immobilization bioreactor of ammonia nitrogen in a kind of processing waste water Download PDFInfo
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- CN106995238A CN106995238A CN201710341470.8A CN201710341470A CN106995238A CN 106995238 A CN106995238 A CN 106995238A CN 201710341470 A CN201710341470 A CN 201710341470A CN 106995238 A CN106995238 A CN 106995238A
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
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Abstract
The invention belongs to technical field of water pollution control, and in particular to the method and immobilization bioreactor of ammonia nitrogen in a kind of processing waste water.Methods described flows into settling zone after waste water is circulated between anoxic zone and aerobic zone, denitrification effect is excellent, aerobic zone is using the mixture of vinyl alcohol sodium alginate embedded particles and activated sludge as microbial degradation material, not only load of microorganisms amount is big, Antimicrobial effect is low, the tolerance of impact load and noxious material is strong, rate of nitrification is fast, sludge yield is few, it is stable, and simple embedded particles reactor relatively, the domestication time of particle has been shortened significantly, relatively low and stable water outlet ammonia nitrogen concentration can be reached within a short period of time, and had the advantage that activated sludge absorption influences with embedded particles decrease high concentration free ammonia on microbial activity concurrently, both synergies enrich community diversity, enhance the operational effect of system, there is good treatment effect to ammonia nitrogen in high density.
Description
Technical field
The invention belongs to technical field of water pollution control, and in particular to the method and immobilization of ammonia nitrogen in a kind of processing waste water
Bioreactor.
Technical background
Ammonia nitrogen in waste water is mainly derived from municipal sewage and industrial wastewater, wherein, the ammonia nitrogen in industrial wastewater is due to dense
Degree change is big, and toxicity is high, hardly degraded organic substance content is high, intractability is big, is still the main tribute of current water environment nitrogen load
One of offer, and it is increasingly becoming the emphasis of water environment ammonia nitrogen loading control.It is wide variety of biological de- in field of waste water treatment at present
Nitrogen method, the unfavorable factors such as carbon source deficiency can be utilized by being limited to the growing multiplication difficulty, nitrifier poor activity, microorganism of nitrifier,
There is different degrees of failure in the biological nitration denitrogenation applied to industrial ammonia nitrogen waste water.
Therefore, efficient, economic, the stably and controllable biological denitrification method for seeking industrial ammonia nitrogen waste water is always industrial ammonia nitrogen
The focus and difficult point of wastewater treatment research.Immobilized microorganism technique is because load of microorganisms amount is big, impact load and poisonous
The tolerance of material is strong, rate of nitrification is fast, sludge yield is few, it is stable the advantages of, it has also become industrial ammonia nitrogen waste water processing
Study hotspot.The treatment effect of immobilized microorganism technique is mainly relevant with two factors, and one is filler, and what is used at present fills out
Material mainly embeds the embedded particles of single bacterial strain；One is reactor, and the immobilization bioreactor used at present is mainly pulled
Three kinds of slot type, fixing packed bed and fluid bed are mixed, wherein whisking more than groove type reactor using batch-type operation, reactor can be made
Interior microbial profile is uniform, improves microorganism utilization rate, but shearing force is excessive, is easily caused embedded immobilization method or crosslinking immobilization
The breakage of particles that method is made；Immobilized microorganism in fixing packed bed reactor can because operating pressure is excessive and mutually extrudes,
Even rupture, causing microorganism catalysis to be lived reduces, and the air pocket produced in airwater mist cooling stream, influences operational effect；And
Fluidized-bed reactor operation requires that strict, cost is too high.
The content of the invention
It is an object of the present invention to provide a kind of method for handling ammonia nitrogen in waste water, the methods described domestication time is short,
Antimicrobial effect is low, and nitrification speeds are fast, sludge yield is few, ammonia nitrogen degradation efficiency high, and community diversity is enriched, and shock resistance is born
Lotus is strong, stable, can efficiently handle industrial waste water with high ammoniac nitrogen.
It is described anti-it is another object of the present invention to provide a kind of biological fixnig reactor for handling ammonia nitrogen in waste water
Answer that device energy consumption is low, three-phase good mixing effect, oxygen mass transfer coefficients are high, simple to operate, take up an area and save.
For achieving the above object, the present invention provides following technical scheme：
A kind of method of ammonia nitrogen in processing waste water, settling zone is flowed into after waste water is circulated between anoxic zone and aerobic zone,
Discharged after settling zone precipitation, it is characterised in that：Described anoxic zone is using activated sludge as microbial degradation material, and described is good
Oxygen area is using the mixture of vinyl alcohol-sodium alginate embedded particles and activated sludge as microbial degradation material, anoxic zone dissolved oxygen
Concentration is no more than 0.2mg/L, and aerobic zone dissolved oxygen concentration is 4-5mg/L, and hydraulic retention of the waste water in anoxic zone and aerobic zone is total
At least 4 hours time.
The method according to the invention, it is characterised in that：Described activated sludge is nitrifying sludge.
The method according to the invention, it is characterised in that：Described vinyl alcohol-sodium alginate embedded particles are by following component
Prepare, in every 100mL aqueous solution, polyvinyl alcohol 10-15g, sodium alginate 0.1-1.0g, activated sludge 10-20g.
The method according to the invention, it is characterised in that：Described vinyl alcohol-sodium alginate embedded particles are by following component
Prepare, in every 100mL aqueous solution, polyvinyl alcohol 10g, sodium alginate 0.8g, activated sludge 10g.
The method according to the invention, it is characterised in that：Described vinyl alcohol-sodium alginate embedded particles are by following component
Prepare, in every 100mL aqueous solution, polyvinyl alcohol 10g, sodium alginate 0.8g, activated sludge 10g, described polyvinyl alcohol
The degree of polymerization is 1700-1800.
The method according to the invention, it is characterised in that：The preparation of described vinyl alcohol-sodium alginate embedded particles include with
Lower preparation process：
(1) polyvinyl alcohol-sodium alginate gel solution is prepared：By addition polyvinyl alcohol 10-15g in every 100mL aqueous solution,
Sodium alginate 0.1-1.0g, activated sludge 10-20g rate of charge, by polyvinyl alcohol, sodium alginate, deionized water Hybrid Heating
Prepare gel, ultrasound, set aside for use；
(2) mixed with activated sludge：After activated sludge acclimatization, centrifugation, physiological saline cleaning, it is added to step (1) and obtains
In the mixed gel solution obtained, it is well mixed；
(3) embedded particles are prepared：The mixture that step (2) is well mixed, which is instilled, contains 2%CaCl2Saturation boric acid solution
In, particle diameter 3-4mm, specific surface area 4-10m is made2/ g embedded particles, and the stirring crosslinking in constant temperature blender with magnetic force
30min；
(4) post-process：Step (3) gains are transferred to 0.5mol/L Na2SO4In solution, 2 hours use is placed at 4 DEG C
Physiological saline is cleaned, multigelation 4 times under the conditions of -20 DEG C, deionized water cleaning, 4 in the waste water that ammonia nitrogen concentration is 50mg/L
Preservation is stand-by under the conditions of DEG C；
Wherein, the supersonic frequency described in step (1) is 40kHz, and ultrasonic time is 30min；
Time of repose described in step (1) is 4 hours；
Centrifugal rotational speed described in step (2) is 3000-5000r/min, and the centrifugation time is 10-20min；It is preferred that
Ground, the centrifugal rotational speed described in step (2) is 3000r/min, and the centrifugation time is 15min；
Physiological saline wash number described in step (2) is 1-3 times.
The method according to the invention, it is characterised in that：Hydraulic retention total time of the waste water in anoxic zone and aerobic zone is 4-
20 hours；Preferably, hydraulic retention total time of the waste water in anoxic zone and aerobic zone is 4-16 hours.
In a specific embodiment, when ammonia nitrogen in waste water concentration is 100mg/L, waste water is in anoxic zone and aerobic zone
Hydraulic retention total time be 4h, when ammonia nitrogen in waste water concentration be 400mg/L, when hydraulic retention of the waste water in anoxic zone and aerobic zone is total
Between be 16h.
The method according to the invention, it is characterised in that：Residence time ratio of the described waste water in anoxic zone and aerobic zone
For 1:1.5-2.5.
The method according to the invention, it is characterised in that：Rate of circulating flow of the waste water in anoxic zone and aerobic zone is 0.06-
0.1m/s。
The method according to the invention, it is characterised in that：Hydraulic detention time of the described waste water in settling zone is small for 0.5-4
When.
The method of ammonia nitrogen in the processing waste water that the present invention is provided, with advantages below：
(1) waste water is circulated in anoxic zone and aerobic zone, after the abundant denitrification in anoxic zone filled with activated sludge, entered
Enter the aerobic zone nitrification filled with activated sludge and vinyl alcohol-sodium alginate embedded particles, denitrification effect is significantly improved；
(2) using the mixture of activated sludge and vinyl alcohol-sodium alginate embedded particles as microbial degradation material in aerobic zone
Material, not only load of microorganisms amount is big, the tolerance of impact load and noxious material is strong, rate of nitrification is fast, sludge yield is few,
Stable and relatively simple embedded particles reactor, has shortened the domestication time of particle, can reach within a short period of time significantly
To relatively low and stable water outlet ammonia nitrogen concentration, and activated sludge absorption and embedded particles decrease high concentration free ammonia pair are had concurrently
The advantage of microbial activity influence, both synergies enrich community diversity, enhance the operational effect of system.
Second aspect, the present invention is provided to the immobilization bioreactor of ammonia nitrogen in waste water processing, including nitrification/denitrification
Unit and the precipitation unit with the common wall of nitrification/denitrification unit, it is characterised in that：
Nitrification/denitrification unit is divided into left side by the left portion of described nitrification/denitrification unit provided with vertical partition wall
Anoxic zone and right side aerobic zone, the top of the partition wall is connected by upper screen cloth with the top of nitrification/denitrification unit, institute
The bottom for stating partition wall is connected by lower screen cloth with the bottom of nitrification/denitrification unit, and upper screen cloth and lower screen cloth can realize embedding
Particle is retained in aerobic zone, and does not influence circulation and exchange of the sewage between anoxic zone and aerobic zone, described nitrification/anti-nitre
The bottom for changing unit is provided with the mud discharging mouthful connected with discharge pipeline, can realize the discharge of aging particle and excess sludge；
The left wall top of the anoxic zone is provided with water inlet, and the anoxic zone follows sewage lifting built with agitating device
Ring, is well mixed；
Provided with impeller under water in the middle part of the right wall of the aerobic zone, promote sewage following between anoxic zone and aerobic zone
Ring, the bottom of the aerobic zone is provided with aerator, and for giving aerobic zone oxygen supply, the upper right quarter of the aerobic zone is passed through provided with one
The conduit of aerobic zone right wall, the left openend of the conduit is equipped with filter screen, realizes the separation of embedded particles and sewage；
The middle part of the precipitation unit is provided with central tube, and the top of the central tube is connected with the right openend of conduit, under
Portion stretches into the bottom of precipitation unit, and the right wall top of the precipitation unit is provided with delivery port, and the bottom of the precipitation unit is provided with
The spoil disposal outlet connected with discharge pipeline, can realize the discharge of sludge.
Further, the top of the aerobic zone is provided with deflector, and the deflector is from upper left to bottom right and vertical plane into α1
Angle, α1For 52-54 °；Preferably, α1For 53 °, sewage circulating between anoxic zone and aerobic zone can be promoted.
Further, flow-stopping plate is provided with before the conduit, the separation of embedded particles and sewage on the one hand can be realized, separately
On the one hand sewage at the uniform velocity inflow catheter can be made.
Further, the aperture of the upper screen cloth, lower screen cloth and filter screen is less than the particle diameter of aerobic zone embedded particles；Preferably,
The aperture of the upper screen cloth, lower screen cloth and filter screen is less than 2.5mm.
Further, the top of described nitrification/denitrification unit is that cuboid, bottom are Fang Dou, the length pair of the Fang Dou
The skew wall and the angle of horizontal plane answered are 45 °.
Further, the physical dimension of described nitrification/denitrification unit meets following relation：Q × t=(HEffectively-H1)L1×
L2+[L1×L2+L3×L4+√(L1×L2+L3×L4)]×H1/ 3, L2=1.5L1,
HEffectively=3.7L1, l1=H-7/6H1, h=1/2H1, H1=1/2L2×tan45°×(1-L4/L2), l2=2/5L2,
H=H2+HEffectively, anoxic zone is 1 with aerobic section length ratio:2, wherein,
Q is sewage influx,
T is the residence time,
L1 is the width of nitrification/denitrification unit top cuboid,
L2 is the length of nitrification/denitrification unit top cuboid,
L3 is the width of nitrification/denitrification unit bottom Fang Dou bottoms,
L4 is the length of nitrification/denitrification unit bottom Fang Dou bottoms,
H1 is nitrification/denitrification unit bottom Fang Dou height, HEffectivelyFor the effective depth of nitrification/denitrification unit,
H2 is safe altitude,
H is total height,
l1For the height of partition wall,
H be partition wall from side bucket bottom with a distance from,
l2For the length of deflector.
Further, the top of described precipitation unit is that cuboid, bottom are Fang Dou, the corresponding skew wall of the Fang Dou length with
Horizontal plane is in 60 ° of angles.
Further, the physical dimension of described precipitation unit meets following relation：L5=L1, L5=L6, L8=L9, H 'Effectively=
HEffectively=3.7L1, wherein,
L5 is the width of precipitation unit top cuboid,
L6 is the length of precipitation unit top cuboid,
L8 is the width of precipitation unit bottom Fang Dou bottoms,
L9 is the length of precipitation unit bottom Fang Dou bottoms,
H’EffectivelyFor the effective depth of precipitation unit.
The immobilization bioreactor that the present invention is provided, sets anoxic zone and aerobic zone, and pass through upper screen cloth and lower screen cloth
While the circulation of waste water and activated sludge in anoxic zone and aerobic zone is realized with exchanging, embedded particles are retained in aerobic zone,
Nitrification/denitrification effect is substantially increased, denitrogenation of waste water effect is obviously improved；In addition, the immobilization biological that the present invention is provided is anti-
Device is answered, is designed using anoxic, aerobic, precipitation integral, embedded particles are directly added on aerobic zone top, and sludge is arranged by bottom
Mud pipe is discharged, and sewage is directly excluded behind settling zone, convenient succinct easy to operate, is saved and is taken up an area.
Brief description of the drawings
Fig. 1 is the three-dimensional structure diagram (ignoring wall thickness) of immobilization bioreactor of the present invention；
Fig. 2 is the sectional view of immobilization bioreactor of the present invention；
Fig. 3 is the left view of immobilization bioreactor nitrification and denitrification unit of the present invention；
Fig. 4 shows left view for the structure of the precipitation unit of immobilization bioreactor of the present invention；
In figure,
1- nitrifications/denitrification unit, 11- partition walls, 12- anoxic zones, 121- water inlets, 122- agitating devices, 13-
Aerobic zone, 131- impellers under water, 132- aerators, 133- conduits, 134- filter screens, 135- deflectors, 136- gears
Flow plate, 14- upper screen cloths, 15- lower screen cloths, 16- mud dischargings mouthful；
2- precipitation units, 21- central tubes, 22- delivery ports, the outlet of 23- spoil disposals；
3- discharge pipelines.
Embodiment
The preparation of the embedded particles of embodiment 1
(1) polyvinyl alcohol-sodium alginate gel solution is prepared：It is extra large by polyvinyl alcohol 10g is added in every 100mL aqueous solution
Polyvinyl alcohol, sodium alginate, deionized water Hybrid Heating are prepared into gel by mosanom 0.8g, activated sludge 10g rate of charge
Shape, the ultrasonically treated 30min under supersonic frequency 40kHz stands 4h stand-by；
(2) mixed with activated sludge：15min, physiological saline will be centrifuged under conditions of activated sludge acclimatization, 3000r/min
After cleaning, in the mixed gel solution for being added to step (1) acquisition, it is well mixed；
(3) embedded particles are prepared：The mixture that step (2) is well mixed, which is instilled, contains 2%CaCl2Saturation boric acid solution
In, particle diameter 3-4mm, specific surface area 4-10m is made2/ g embedded particles, and the stirring crosslinking in constant temperature blender with magnetic force
30min；
(4) post-process：Step (3) gains are transferred to 0.5mol/L Na2SO4In solution, 2 hours use is placed at 4 DEG C
Multigelation 4 times under the conditions of physiological saline is cleaned 1-3 times, -20 DEG C, deionized water cleaning, in ammonia nitrogen concentration giving up for 50mg/L
Preservation is stand-by under the conditions of 4 DEG C in water；
The preparation of the embedded particles of case study on implementation 2
Prepare polyvinyl alcohol-sodium alginate gel solution：By addition polyvinyl alcohol 10g, alginic acid in every 100mL aqueous solution
Sodium 0.1g, activated sludge 15g.
Preparation method be the same as Example 1.
The preparation of the embedded particles of case study on implementation 3
Prepare polyvinyl alcohol-sodium alginate gel solution：By addition polyvinyl alcohol 15g, alginic acid in every 100mL aqueous solution
Sodium 1.0g, activated sludge 20g.
Preparation method be the same as Example 1.
The preparation of the embedded particles of case study on implementation 4
Prepare polyvinyl alcohol-sodium alginate gel solution：By addition polyvinyl alcohol 10g, alginic acid in every 100mL aqueous solution
Sodium 0.5g, activated sludge 15g.
Preparation method be the same as Example 1.
Embodiment 5
Referring to the immobilization bioreactor shown in Fig. 1-Fig. 2, including nitrification/denitrification unit 1 and with nitrification/denitrification
The precipitation unit 2 of the wall altogether of unit 1, the left portion of described nitrification/denitrification unit 1 will be nitrified provided with vertical partition wall 11/and it is anti-
1 point of anoxic zone 12 and the aerobic zone 13 on right side for left side of de-nitrification unit, the top of the partition wall 11 passes through upper screen cloth 14 and nitre
The top of change/denitrification unit 1 is connected, and the bottom of the partition wall 11 passes through the bottom of lower screen cloth 15 and nitrification/denitrification unit 1
It is connected, upper screen cloth 14 and lower screen cloth 15 can realize that embedded particles are retained in aerobic zone 13, and not influence sewage in anoxic zone 12
Circulation and exchange between aerobic zone 13, the bottom of described nitrification/denitrification unit 1 are provided with the dirt connected with discharge pipeline 3
Mud floss hole 16, can realize the discharge of aging particle and excess sludge；
The left wall top of the anoxic zone 12 is provided with water inlet 121, and the anoxic zone 12 makes built with agitating device 122
Sewage lifting is circulated, and is well mixed；
Provided with impeller 131 under water in the middle part of the right wall of the aerobic zone 13, promote sewage between anoxic zone and aerobic zone
Circulation, the bottom of the aerobic zone 13 is provided with aerator 132, for giving aerobic zone oxygen supply, the upper right of the aerobic zone 13
Portion is equipped with filter screen 134, realizes embedding provided with a conduit 133 for passing through the right wall of aerobic zone 13, the left openend of the conduit 133
The separation of grain and sewage；
The middle part of the precipitation unit 2 is provided with central tube 21, and top and the right openend of conduit 133 of the central tube 21 connect
Logical, the bottom of precipitation unit 2 is stretched into bottom, and the right wall top of the precipitation unit 2 is provided with delivery port 22, the precipitation unit 2
Bottom be provided with the spoil disposal that connect with discharge pipeline 3 and export 23, the discharge of sludge can be realized.
The top of the aerobic zone 13 is provided with deflector 135, and the deflector 135 is from upper left to bottom right and vertical plane into α1
Angle, α1For 52-54 °；Preferably, α1For 53 °, sewage circulating between anoxic zone and aerobic zone can be promoted.
Flow-stopping plate 136 is provided with before the conduit 133, the separation of embedded particles and sewage on the one hand can be realized, separately
On the one hand can be sewage at the uniform velocity inflow catheter 133.
The aperture of the upper screen cloth 14, lower screen cloth 15 and filter screen 134 is less than the particle diameter of aerobic zone embedded particles；Preferably,
The aperture of the upper screen cloth 14, lower screen cloth 15 and filter screen 134 is less than 2.5mm.
The top of described nitrification/denitrification unit 1 is that cuboid, bottom are Fang Dou, and the length of the Fang Dou is corresponding tiltedly
The angle of wall and horizontal plane is 45 °.
The physical dimension of described nitrification/denitrification unit 1 meets following relation：Q × t=(HEffectively-H1)L1×L2+[L1
×L2+L3×L4+√(L1×L2+L3×L4)]×H1/ 3, L2=1.5L1, HEffectively=3.7L1, l1=H-7/6H1, h=1/2H1, H1
=1/2L2×tan45°×(1-L4/L2), l2=2/5L2, H=HEffectively+H2Anoxic zone 12 is identical with the width of aerobic zone 13, anoxic
Area 12 is 1 with the length ratio of aerobic zone 13:2, wherein,
Q is sewage influx,
T is the residence time,
L1 is the width of the top cuboid of nitrification/denitrification unit 1,
L2 is the length of the top cuboid of nitrification/denitrification unit 1,
L3 is the width of the bottom Fang Dou bottoms of nitrification/denitrification unit 1,
L4 is the length of the bottom Fang Dou bottoms of nitrification/denitrification unit 1,
H1 is the bottom Fang Dou of nitrification/denitrification unit 1 height,
HEffectivelyFor the effective depth of nitrification/denitrification unit 1,
H is that reactor is always high,
H2For safe altitude.
l1For the height of partition wall 11,
H be partition wall 11 from side bucket bottom with a distance from,
l2For the length of deflector.
The top of described precipitation unit 2 is that cuboid, bottom are Fang Dou, the corresponding skew wall of the Fang Dou length and horizontal plane
In 60 ° of angles.
The physical dimension of described precipitation unit 2 meets following relation：L5=L1, L5=L6, L8=L9, H 'Effectively=HEffectively=
3.7L1, wherein,
L5 is the width of the top cuboid of precipitation unit 2,
L6 is the length of the top cuboid of precipitation unit 2,
L8 is the width of the bottom Fang Dou bottoms of precipitation unit 2,
L9 is the length of the bottom Fang Dou bottoms of precipitation unit 2,
H’EffectivelyFor the effective depth of precipitation unit 2.
The processing of the ammonia nitrogen waste water of embodiment 6
By initial ammonia nitrogen concentration be 100mg/L, COD be about 500mg/L waste water in the immobilization biological shown in embodiment 5
Run in reactor, mixed genetic-neural network (MLSS) control is put into 4000mg/L or so, aerobic zone in anoxic zone
Embedded particles prepared by the embodiment 2 of the volume of aerobic zone 10%, anoxic zone dissolved oxygen concentration is no more than 0.2mg/L, and aerobic zone is molten
Oxygen (DO) control is solved in 4mg/L or so, Na is added2CO3It is 7.5~8.5, water of the waste water in anoxic zone and aerobic zone to adjust pH value
Power stopped total time for 4 hours, and the residence time ratio in anoxic zone and aerobic zone is 1:1.5, during the hydraulic retention of settling zone
Between be 0.5h, detection settling zone outlet outflow water in ammonia nitrogen concentration be 3.69mg/L, ammonia nitrogen removal frank is 96.31%.
The processing of the ammonia nitrogen waste water of embodiment 7
By initial ammonia nitrogen concentration be 200mg/L, COD be about 500mg/L waste water in the immobilization biological shown in embodiment 5
Run in reactor, mixed genetic-neural network (MLSS) control is put into 4000mg/L or so, aerobic zone in anoxic zone
Embedded particles prepared by the embodiment 3 of the volume of aerobic zone 10%, anoxic zone dissolved oxygen concentration is no more than 0.2mg/L, and aerobic zone is molten
Oxygen (DO) control is solved in 5mg/L or so, Na is added2CO3It is 7.5~8.5, water of the waste water in anoxic zone and aerobic zone to adjust pH value
Power stopped total time for 1.5 hours, and the residence time ratio in anoxic zone and aerobic zone is 1:2, during the hydraulic retention of settling zone
Between be 1h, detection settling zone outlet outflow water in ammonia nitrogen concentration be 26.42mg/L, ammonia nitrogen removal frank is 86.79%.
The processing of the ammonia nitrogen waste water of embodiment 8
By initial ammonia nitrogen concentration be 300mg/L, COD be about 500mg/L waste water in the immobilization biological shown in embodiment 5
Run in reactor, mixed genetic-neural network (MLSS) control is put into 4000mg/L or so, aerobic zone in anoxic zone
Embedded particles prepared by the embodiment 1 of the volume of aerobic zone 10%, anoxic zone dissolved oxygen concentration is no more than 0.2mg/L, and aerobic zone is molten
Oxygen (DO) control is solved in 5mg/L or so, Na is added2CO3It is 7.5~8.5, water of the waste water in anoxic zone and aerobic zone to adjust pH value
Power stopped total time for 12 hours, and the residence time ratio in anoxic zone and aerobic zone is 1:2, the hydraulic detention time of settling zone
Ammonia nitrogen concentration is 42.84mg/L in the water flowed out for 3h, the outlet of detection settling zone, and ammonia nitrogen removal frank is 75.72%.
The processing of the ammonia nitrogen waste water of embodiment 9
By initial ammonia nitrogen concentration be 400mg/L, COD be about 500mg/L waste water in the immobilization biological shown in embodiment 5
Run in reactor, mixed genetic-neural network (MLSS) control is put into 4000mg/L or so, aerobic zone in anoxic zone
Embedded particles prepared by the embodiment 1 of the volume of aerobic zone 10%, anoxic zone dissolved oxygen concentration is no more than 0.2mg/L, and aerobic zone is molten
Oxygen (DO) control is solved in 5mg/L or so, Na is added2CO3It is 7.5~8.5, water of the waste water in anoxic zone and aerobic zone to adjust pH value
Power stopped total time for 16 hours, and the residence time ratio in anoxic zone and aerobic zone is 1:2, the hydraulic detention time of settling zone
Ammonia nitrogen concentration is 136.96mg/L in the water flowed out for 4h, the outlet of detection settling zone, and ammonia nitrogen removal frank is 65.76%.
Claims (10)
1. a kind of method for handling ammonia nitrogen in waste water, settling zone is flowed into after waste water is circulated between anoxic zone and aerobic zone,
Discharged after settling zone precipitation, it is characterised in that：Described anoxic zone is using activated sludge as microbial degradation material, and described is aerobic
Area is using the mixture of vinyl alcohol-sodium alginate embedded particles and activated sludge as microbial degradation material, and anoxic zone dissolved oxygen is dense
Degree is no more than 0.2mg/L, and aerobic zone dissolved oxygen concentration is 4-5mg/L, when hydraulic retention of the waste water in anoxic zone and aerobic zone is total
Between at least 4 hours.
2. according to the method described in claim 1, it is characterised in that：Described activated sludge is nitrifying sludge, described ethene
Alcohol-sodium alginate embedded particles are prepared by following component, in every 100mL aqueous solution, polyvinyl alcohol 10-15g, alginic acid
Sodium 0.1-1.0g, activated sludge 10-20g；Preferably, described vinyl alcohol-sodium alginate embedded particles are by following component system
It is standby to obtain, in every 100mL aqueous solution, polyvinyl alcohol 10g, sodium alginate 0.8g, activated sludge 10g；It is further preferred that described
Vinyl alcohol-sodium alginate embedded particles prepared by following component, per the 100mL aqueous solution in, polyvinyl alcohol 10g, sea
Mosanom 0.8g, activated sludge 10g, the described polyvinyl alcohol degree of polymerization is 1700-1800.
3. according to the method described in claim 1, it is characterised in that：Hydraulic retention total time of the waste water in anoxic zone and aerobic zone
For 4-20 hours, the residence time ratio in anoxic zone and aerobic zone was 1:1.5-2.5, the recycle stream in anoxic zone and aerobic zone
Speed is 0.06-0.1m/s；Preferably, hydraulic retention total time of the waste water in anoxic zone and aerobic zone is 4-16 hours.
4. according to the method described in claim 1, it is characterised in that：Hydraulic detention time of the described waste water in settling zone be
0.5-4 hours.
5. the immobilization bioreactor handled for ammonia nitrogen in waste water, including nitrification/denitrification unit (1) and with nitrification/anti-nitre
Change the precipitation unit (2) of the common wall of unit (1), it is characterised in that：
The left portion of described nitrification/denitrification unit (1) divides nitrification/denitrification unit (1) provided with vertical partition wall (11)
The aerobic zone (13) of anoxic zone (12) and right side for left side, the top of the partition wall (11) by upper screen cloth (14) and nitrification/
The top of denitrification unit (1) is connected, and the bottom of the partition wall (11) passes through lower screen cloth (15) and nitrification/denitrification unit (1)
Bottom be connected, the bottom of described nitrification/denitrification unit (1) is provided with the mud discharging mouth (16) connect with discharge pipeline (3)；
The left wall top of the anoxic zone (12) is provided with water inlet (121), and the anoxic zone (12) is built with agitating device
(122)；
Provided with impeller (131) under water in the middle part of the right wall of the aerobic zone (13), the bottom of the aerobic zone (13) is provided with aeration
Device (132), the upper right quarter of the aerobic zone (13) is provided with a conduit (133) for passing through aerobic zone (13) right wall, the conduit
(133) left openend is equipped with filter screen (134)；
The middle part of the precipitation unit (2) is provided with central tube (21), and the top and the right side of conduit (133) of the central tube (21) are opened
The bottom of precipitation unit (2) is stretched into mouth end connection, bottom, and the right wall top of the precipitation unit (2) is provided with delivery port (22), institute
The bottom for stating precipitation unit (2) is provided with the spoil disposal outlet (23) connected with discharge pipeline (3).
6. immobilization bioreactor according to claim 5, it is characterised in that：The top of the aerobic zone (13) is provided with
Deflector (135), the deflector (135) is from upper left to bottom right and vertical plane into α1Angle, α1For 52-54 °；Preferably, α1For
53°。
7. immobilization bioreactor according to claim 5, it is characterised in that：It is provided with before the conduit (133)
Flow-stopping plate (136).
8. immobilization bioreactor according to claim 5, it is characterised in that：The upper screen cloth (14), lower screen cloth
(15) and filter screen (134) aperture be less than aerobic zone embedded particles particle diameter；Preferably, the upper screen cloth (14), lower screen cloth
(15) and filter screen (134) aperture be less than 2.5mm.
9. immobilization bioreactor according to claim 5, it is characterised in that：Described nitrification/denitrification unit (1)
Top be that cuboid, bottom are Fang Dou, the corresponding skew wall of length of the Fang Dou and the angle of horizontal plane are 45 °, nitrification/anti-nitre
The physical dimension for changing unit (1) meets following relation：Q × t=(HEffectively-H1)L1×L2+[L1×L2+L3×L4+√(L1×L2+L3
×L4)]×H1/ 3, L2=1.5L1, HEffectively=3.7L1, l1=H-7/6H1, h=1/2H1, H1=1/2L2×tan45°×(1-L4/
L2), l2=2/5L2, H=H2+HEffectively, anoxic zone (12) are 1 with aerobic zone (13) length ratio:2, wherein,
Q is sewage influx,
T is the residence time,
L1 is the width of nitrification/denitrification unit (1) top cuboid,
L2 is the length of nitrification/denitrification unit (1) top cuboid,
L3 is the width of nitrification/denitrification unit (1) bottom Fang Dou bottoms,
L4 is the length of nitrification/denitrification unit (1) bottom Fang Dou bottoms,
H1 is nitrification/denitrification unit (1) bottom Fang Dou height, HEffectivelyFor the effective depth of nitrification/denitrification unit (1),
H2 is safe altitude,
H is total height,
l1For the height of partition wall (11),
H be partition wall (11) from side bucket bottom with a distance from,
l2For the length of deflector.
10. immobilization bioreactor according to claim 5, it is characterised in that：The top of described precipitation unit (2)
Be Fang Dou for cuboid, bottom, the corresponding skew wall of the Fang Dou length horizontal by 60 ° of angles,
The physical dimension of precipitation unit (2) meets following relation：L5=L1, L5=L6, L8=L9, H 'Effectively=HEffectively=3.7L1, its
In,
L5 is the width of precipitation unit (2) top cuboid,
L6 is the length of precipitation unit (2) top cuboid,
L8 is the width of precipitation unit (2) bottom Fang Dou bottoms,
L9 is the length of precipitation unit (2) bottom Fang Dou bottoms,
H’EffectivelyFor the effective depth of precipitation unit (2).
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