CN107381813A - The device and method of sludge segment reflux strengthened anaerobic ammoxidation denitrification process - Google Patents
The device and method of sludge segment reflux strengthened anaerobic ammoxidation denitrification process Download PDFInfo
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
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Abstract
The device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process, it is to include storage raw water box, intake pump, biochemical reactor, the continuous flow reactor of sedimentation basin, the continuous flow reactor is connected with PLC.Biochemical reactor includes promising anaerobic zone, aerobic zone and anoxic zone.Municipal sewage raw water box is connected by intake pump with the water inlet pipe of biochemical reactor, and sewage passes through water inlet pipe successively anaerobic zone, aerobic zone, anoxic zone and the sedimentation basin by being linked in sequence.Sedimentation basin is after mud-water separation, and supernatant is as Chinese effluent.In anaerobic zone, the organic synthesis internal carbon source in activated sludge absorption degraded water inlet；By controlling dissolved oxygen in aerobic zone, the coupling of short-cut denitrification and Anammox is realized, improves the nitrogen removal rate of system.
Description
Technical field
The present invention relates to biotechnology to handle field of sewage, and more specifically, more particularly to a kind of sludge segment reflux is strong
Change the device and method of Anammox denitrification process.
Background technology
The removal of nitrogen pollutant is municipal sewage and Industrial Wastewater Treatment key issue.China's municipal sewage and industrial wastewater
Content of organics is relatively low, and using traditional nitration denitrification denitrogenation technique, water outlet total nitrogen is difficult to qualified discharge.In recent years,
For the body eutrophication phenomenon of alleviation China's getting worse, the total nitrogen discharge standard of municipal sewage and industrial effluent treatment plant is more
Add strict therefore more obvious the shortcomings that traditional biological denitrification process treatment effeciency is low, aeration energy consumption is high.In traditional biological denitrogenation
Upgrading and substitute technology in, Anammox denitrogenation technology is most one of developing direction of prospect.Anammox technology
It is a kind of new bio-denitrification technology, nitric efficiency is high, and aeration energy consumption is low.The denitrification process is with anaerobic ammonia oxidizing bacteria uniqueness
Based on physiological metabolism approach, denitrification process does not need organic matter to participate in, therefore denitrification effect is not by entering organic matter of water deficiency
Influence；Importantly, the partial organic substances can be used as energy recovery, so as to improve municipal sewage and Industrial Wastewater Treatment
Factory's energy-autarchic rate.
Although municipal sewage and industrial wastewater Anammox denitrification process tool achieve obvious economic benefit and ring
Border benefit, but still suffer from many bottlenecks, wherein Anammox using Anammox technical finesse municipal sewage at present
It is one of them that the water outlet total nitrogen of technique, which is difficult to up to standard,.According to the metabolic mechanism of anaerobic ammonia oxidizing bacteria, in oxidation ammonia nitrogen and nitrous
During hydrochlorate generation nitrogen, a part of nitrite is oxidized to nitrate, is provided for the assimilation of Anammox
Reducing power.Therefore, in the total nitrogen that anaerobic ammonia oxidizing bacteria removes, in addition to 89% is converted into nitrogen discharge, also 11% total nitrogen
Nitrate is converted into remain in sewage.The nitrate that this part additionally generates may cause the raising of water outlet total nitrogen, to going out
In the environment of water water quality has strict demand, simple Anammox technology will be difficult to stable water outlet qualified discharge.
The stable operation of Anammox acts synergistically dependent on microbiologic population.The loss or competition of function bacterium in system
The growth of property microorganism, can cause nitrogen removal performance to decline.Competitive microorganism growth causes what nitrogen removal performance declined in system
Problem solution still not yet in effect, the growth of nitrite nitrogen oxidation bacteria (NOB), can cause effluent nitrate-nitrogen to increase especially in system.
In Anammox engineering worldwide, there is the increased situation of effluent nitrate-nitrogen concentration in 30% system, and
Lacking effective regulating strategy after system unstability reduces nitrate nitrogen in water outlet, system unstable state normal periods of months time.Cause
This sewage treatment process based on Anammox technology, the nitrate in water outlet how is further cut down, improve system total nitrogen
Clearance is one of bottleneck broken through using technology needs.
The content of the invention
(1) technical problem
Therefore, how to solve sewage disposal nitrogen removal rate due to water outlet Nitrate Accumulation, it is difficult to which that further improves asks
Topic, into those skilled in the art's urgent problem to be solved.
(2) technical scheme
In view of the above-mentioned problems, the present invention provide a kind of sludge segment reflux strengthened anaerobic ammoxidation denitrification process device and
Method.
The device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process, it is to include storage raw water box, intake pump, life
Change reactor, the continuous flow reactor of sedimentation basin, the continuous flow reactor is connected with PLC.
The raw water box is provided with blow-down pipe and overflow pipe.The blow-down pipe of the raw water box is provided with Self controlling valve.The raw water
Case is connected by intake pump with the water inlet pipe of the biochemical reactor.
The biochemical reactor includes promising anaerobic zone, aerobic zone and anoxic zone.The anaerobic zone is provided with speed-adjustable stir device,
The anaerobic zone is connected with water inlet pipe.The anoxic zone is provided with speed-adjustable stir device, and the aerobic zone is provided with biologic packing material, diaphragm exposes
Gas head, air volume regulating valve, air blower, gas flowmeter, check-valves；The air blower passes through gas flowmeter and air volume regulating valve
It is connected with diaphragm aeration head.The sedimentation basin is provided with mud return line, supernatant delivery pipe, outlet pipeline.The water outlet
Pipeline is located at the middle top of sedimentation basin.The sedimentation basin is connected with anaerobic zone and anoxic zone respectively by mud return line, dirty
Mud return duct is set by two sludge pumps and a mud valve simultaneously.
The speed-adjustable stir device of the anaerobic zone and speed-adjustable stir device, intake pump, air blower, sludge pump, the supernatant of anoxic zone
Liquid delivery pipe is equipped with autocontrol switch.
The Self controlling valve, autocontrol switch, draining valve, mud valve, air volume regulating valve, gas flowmeter are online automatic control
Part；Online sludge concentration meter is respectively equipped with the anaerobic zone of the biochemical reactor and anoxic zone, the aerobic zone is provided with
Line dissolved oxygen concentration meter, online ammonia nitrogen concentration meter, the anoxic zone are provided with online nitrate concentration meter, above-mentioned autocontrol part and
The PLC of line sludge concentration meter, online dissolved oxygen concentration meter, online nitrate concentration meter and online ammonia nitrogen concentration meter with setting
Controller carries out signal and control connects, and finally enters the computer being connected with PLC.After computer operation simulation
Instruction be connected respectively with anoxic zone sludge reflux pump, anaerobic zone sludge reflux pump, air blower by PLC, to sludge
Capacity of returns and aeration quantity are respectively controlled.
The PLC uses SIEMENS 200, the PLC and the Self controlling valve, autocontrol switch, row
Water valve, mud valve, air volume regulating valve, gas flowmeter, online dissolved oxygen concentration meter, online ammonia nitrogen concentration meter, online nitrate
Densimeter, online sludge concentration meter are connected.The PLC is also connected with computer.
Municipal sewage raw water box is connected by intake pump with the water inlet pipe of biochemical reactor, sewage by water inlet pipe successively
By anaerobic zone, aerobic zone, anoxic zone and the sedimentation basin being linked in sequence.After mud-water separation, supernatant is used as sedimentation basin
Water discharges.
A kind of method of sludge segment reflux strengthened anaerobic ammoxidation denitrification process, it is that sewage flows through anaerobic zone, good successively
Oxygen area, anoxic zone and sedimentation basin.In anaerobic zone, the organic synthesis internal carbon source in activated sludge absorption degraded water inlet.Good
By controlling dissolved oxygen in oxygen area, the coupling of short-cut denitrification and Anammox is realized, improves the nitrogen removal rate of system.
The method for carrying out sewage disposal using the device of above-mentioned sludge segment reflux strengthened anaerobic ammoxidation denitrification process, tool
There are following steps：
The first step, seed sludge.Biochemical reactor is according to volume ratio 1:1 inoculation municipal sewage plant's second pond backflow is dirty
Mud and the short distance nitration sludge of the high ammonia-nitrogen sewage treatment system of stable operation discharge so that floc sludge concentration is in 4.5g/L；
And taking biofilm packing to be seeded to aerobic zone out of stable operation high ammonia-nitrogen wastewater anaerobic ammonia oxidation reactor, packing volume accounts for
The 20% of aerobic zone volume.
Second step, reactor start-up.Intake pump is opened, sewage is led into anaerobic zone from raw water box；The agitator of anaerobic zone
Open, promote muddy water mixing, strengthen mass transfer；Mixed liquor then goes through aerobic zone, and air blower is opened, while adjusts aerating pipelines
Valve carry out low-oxygen aeration, the dissolved oxygen in control reactor aerobic zone is in 0.1-0.3mg/L；Mixed liquor enters anoxic
Area, the agitator of anoxic zone are opened, and promote muddy water mixing；Subsequent mixed liquor enters sedimentation basin, and active sludge intermixture is heavy
Shallow lake pond carries out mud-water separation, and supernatant overflow water outlet passes through sludge reflux pump as final outflow water, sedimentation basin bottom thickened sludge
Anaerobic zone and anoxic zone are back to respectively, and return sludge ratio is respectively 50% and 100%.
3rd step, reactor stable operation.By the data of the on-line monitoring equipment in system, the operation feelings of system are judged
Condition, while adjust aeration quantity, sludge reflux amount and sludge volume.When the dissolved oxygen concentration of aerobic zone is higher than 0.3mg/L or ammonia nitrogen
When concentration is less than 5mg/L, the aeration quantity of air blower is reduced；When the dissolving oxygen concentration of aerobic zone is less than 0.1mg/L or ammonia nitrogen
Concentration is higher than 8mg/L, improves the aeration quantity of air blower.When the nitrate concentration of anoxic zone is higher than 5mg/L, improve to anoxic zone
Sludge reflux ratio.When the sludge concentration of anaerobic zone is higher than 5g/L, spoil disposal valve is opened, discharges excess sludge, reduces system
Sludge concentration of uniting is to 4.5mg/L.
(3) beneficial effect
The beneficial effects of the invention are as follows：1. the present invention is provided with preposition anaerobic zone, in anaerobic zone, returned sludge and raw water are abundant
Mixing, the organic matter in absorption water inlet, and save as internal carbon source.Enter Organic substance in water in anaerobic zone to decline rapidly so that different
Propagation of the bacteria in aerobic zone is limited, and reduces the influence to autotrophic microbes such as Anammoxs, and the system of improving resists organic
The ability of thing impact load；Microorganism in another aspect aerobic zone can realize short-cut denitrification using sludge internal carbon source, and
Coupled with Anammox reaction, realize the further raising of system nitrogen removal rate.
2. the setting of rearmounted anoxic zone of the invention has many-sided act on.Anoxic zone rearmounted first, be short-cut denitrification with
The coupling of Anammox provides a suitable condition, and the nitrate in system is reduced to nitrous acid under anoxic conditions
Salt, nitrite are further removed with ammonia nitrogen by Anammox approach, reduce total nitrogen.Because anoxic zone can further drop
The ammonia nitrogen concentration of aerobic zone, can be maintained at more than 5-8mg/L by low ammonia nitrogen, and aerobic zone keeps higher ammonia nitrogen concentration favourable
In the growth of NOB in the generation for avoiding aeration phenomenon, suppression system, be advantageous to anaerobic ammonia oxidation process
Stable operation.
3. it is relatively low based on the rear-mounted denitrification of internal carbon source and Anammox coupled reaction speed, it is mainly dense by internal carbon source
Degree and the limitation in reaction time.For the problem, the present invention is provided with sludge segment reflux, partial sludge normal reflow to anaerobism
Area, keep the activated sludge concentration of reactor；Partial sludge is directly back to anoxic zone simultaneously, and sludge is individually back to anoxic
Area, on the one hand improve the sludge concentration of anoxic zone, reinforcement sludge internal carbon source denitrification；On the other hand increase sludge in anoxic zone and
The residence time of sedimentation basin, promote sludge fermentation, strengthen the utilization of internal carbon source.In a word, rearmounted anoxic zone and sludge segment reflux
Application, it is possible to achieve the further raising of system nitrogen removal rate so that effluent quality reaches stricter discharge standard,
Reduce the operating cost of integrated artistic.
To sum up, invention applies anaerobic ammonium oxidation technology for biological denitrification, have compared with existing standard biologic denitrification process
There is operation energy consumption reduction, 60% aeration quantity can be saved, operation controls the advantage such as simple and easy；And the present invention is in anaerobism ammonia oxygen
On the basis of changing denitrification process, by setting preposition anaerobic zone and rearmounted anoxic zone, with reference to sludge segment reflux, introduce based on interior
The short-cut denitrification coupling Anammox technology of carbon source, also has significantly excellent compared with the Anammox technology of routine
Gesture.The present invention is applied to the processing of municipal sewage and industrial wastewater；The impact load ability of anti-water inlet is strong, total nitrogen removal efficiency
Height, system control are flexible.
Brief description of the drawings
Fig. 1 is that the device overall structure of sludge segment reflux strengthened anaerobic ammoxidation biological denitrification process of the present invention is illustrated
Figure.
In figure：1 is raw water box；1.1 be blow-down pipe；1.2 be overflow pipe；2 be intake pump；3 be anaerobic zone；3.1 be stirring
Device, 4 be aerobic zone；4.1 be fixed filler；4.2 be aerating regulation valve；4.3 be gas flowmeter；4.4 be check-valves；4.5 it is
Diaphragm type aeration head；5 be anoxic zone；5.1 be agitator, and 6 be sedimentation basin；7 be outlet pipeline；8 be anoxic zone sludge reflux pump；
9 be anaerobic zone sludge reflux pump；10 be spoil disposal valve；11 be air blower；12 be sludge concentration meter；13 be online ammonia nitrogen concentration
Meter；14 be online dissolved oxygen concentration meter；15 be sludge concentration meter；16 be online nitrate concentration meter；17 be process controller；18
It is computer.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
In the description of the invention, the orientation of instruction such as term " on ", " under ", "front", "rear", " top ", " bottom " or
Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
As shown in figure 1, the device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process, by raw water box 1, intake pump 2,
Biochemical reactor, sedimentation basin 6 and PLC 17 form, and the biochemical reactor includes anaerobic zone 3, aerobic zone 4 and anoxic
Area 5.
In embodiment, the raw water box 1 is arranged to 500L, and the biochemical reactor is the continuous stream of lucite material
Reactor, dischargeable capacity 210L, wherein the volume of the anaerobic zone 3, the aerobic zone 4 and the anoxic zone 5 is respectively
30L, 120L and 60L.The anaerobic zone 3 is provided with speed-adjustable stir device 3.1, and the anoxic zone 5 is provided with speed-adjustable stir device 5.1.
The aerobic zone 4 is provided with biologic packing material 4.1, diaphragm aeration head 4.5, air volume regulating valve 4.2, air blower 11, gas flowmeter
4.3rd, check-valves 4.4.The air blower 11 is connected by gas flowmeter 4.3 and air volume regulating valve 4.2 with diaphragm aeration head 4.5
Connect.The sedimentation basin 6 is connected with anaerobic zone 3 and anoxic zone 5 respectively by mud return line, and mud return line sets sludge simultaneously
Pump 8 and 9 and mud valve 10.Carried out in the speed-adjustable stir device 3.1 and 5.1 that the anaerobic zone 3 and the anoxic zone 5 are installed continuous
Stirring, ensure sludge mixing, strengthen effect of mass transmitting.The aerobic zone 4 provides aeration by air blower 11, and aeration head uses diaphragm
Formula aeration head 4.5.Back mixing between reactor, each reactor are separated by dividing plate, and the correct position on dividing plate sets connection
Pipe.The sludge of sedimentation basin bottom can be back to anaerobic zone 3 and anoxic zone 5 respectively by sludge reflux pump 8 and 9, can also lead to
Cross mud valve 10 and carry out excess sludge discharge.
Online sludge concentration meter 12 is installed in the anaerobic zone 3, online sludge concentration meter 15 is installed in the aerobic zone 4,
Online dissolved oxygen concentration meter 14 is installed in the end of the aerobic zone 4 and online ammonia nitrogen concentration meter 13, the anoxic zone are pacified simultaneously
Mounted in line nitrate concentration meter 16, the data of each online densimeter collection are connected by connecting line with process controller 17, and
Finally enter the computer 18 being connected with process controller.Instruction after the operation simulation of computer 18 passes through process controller
17 are connected with anoxic zone sludge reflux pump 8, anaerobic zone sludge reflux pump 9, air blower 11 respectively.To sludge reflux amount and aeration quantity
It is respectively controlled.
The sludge liquor that the present embodiment uses is derived from the preliminary sedimentation tank water outlet of sewage treatment plant of Beijing, by strengthening pre- place
After reason, for its typical ammonia nitrogen concentration value in 50-60mg/L, basicity is about 200mg/L (with CaCO3Meter), provided using the present invention
The device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process carry out sewage disposal, operating method step is as follows：
The first step, seed sludge.Biochemical reactor is according to volume ratio 1:1 inoculation municipal sewage plant's second pond backflow is dirty
Mud and the short distance nitration sludge of the high ammonia-nitrogen sewage treatment system of stable operation discharge so that floc sludge concentration is in 4.5g/L；
And biofilm packing is taken to be seeded to aerobic zone, fixed filler out of stable operation high ammonia-nitrogen wastewater anaerobic ammonia oxidation reactor
4.1 volumes account for the 20% of aerobic zone volume.
Second step, startup stage.Intake pump 2 is opened, sewage is led into the anaerobic zone 3 from the raw water box 1；Anaerobic zone
Speed-adjustable stir device 3.1 open, promote muddy water mixing, strengthen mass transfer；Mixed liquor then goes through the aerobic zone 4, the drum
Blower fan 11 is opened, while the air volume regulating valve 4.2 for adjusting aerating pipelines is aerated, with reference to the online dissolved oxygen concentration meter 14
The dissolved oxygen in the aerobic zone is controlled in 0.1-0.3mg/L；Mixed liquor enters the anoxic zone 5, and the speed governing of anoxic zone is stirred
Mix device 5.1 to open, promote muddy water mixing；Subsequent mixed liquor enters the sedimentation basin 6, and active sludge intermixture enters in sedimentation basin
Row mud-water separation, supernatant overflow water outlet enter outlet pipeline 7, and sedimentation basin bottom thickened sludge passes through sludge reflux pump 8 and 9 points
Anoxic zone and anaerobic zone are not back to, and return sludge ratio is respectively 50% and 100%.According to from underload to normal duty gradient
The increased method of operation gradually steps up flow of inlet water, to carry out sludge acclimatization, when online ammonia nitrogen concentration meter sets stabilization in 5-
8mg/L, when online nitrate concentration counting value stabilization is less than 10mg/L, confirms that it starts and terminate to enter the even running stage.
3rd step, reactor stable operation operation.After the biochemical reactor successfully starts up, into stable operation period.
The initial hydraulic detention time of reactor is set to 10h, and anaerobic zone return sludge ratio is 50%, aerobic zone return sludge ratio 100%.
Open control loop and control is optimized to whole reaction process.By the pre-set programs of PLC, monitor the device
Line number evidence, judges the running situation of the device, while adjusts aeration quantity, sludge reflux amount and sludge volume.When the dissolving of aerobic zone
When oxygen concentration is higher than 0.3mg/L or when ammonia nitrogen concentration is less than 5mg/L, the aeration quantity of air blower is reduced；When the dissolved oxygen of aerobic zone
When degree concentration is less than 0.1mg/L or ammonia nitrogen concentration is higher than 8mg/L, improves the aeration quantity of air blower.When the nitrate of anoxic zone is dense
When degree is higher than 5mg/L, the sludge reflux ratio to anoxic zone is improved.When the sludge concentration of anaerobic zone is higher than 5g/L, the row of unlatching
Slurry valve door 10, excess sludge is discharged, reduce system sludge concentration to 4.5mg/L.Dissolved oxygen concentration, ammonia nitrogen according to input simultaneously
Concentration and nitrate concentration, as the input variable of fuzzy controller, the bivariate of input is through Fuzzy processing, to intake pump 2
Flow be controlled.
Continuous result of the test shows using Beijing Primary Settling Tanks of Municipal Wastewater Treatment Plant water outlet as process object, the system table
Now good total nitrogen removal effect, the ammonia nitrogen and total nitrogen of water outlet can stably reach one-level emission standard A.
The present invention is not limited to the above-described embodiments, and anyone can draw other various shapes under the enlightenment of the present invention
The product of formula.All equivalent changes and modifications done according to scope of the present invention patent, it should all belong to the covering scope of the present invention.
Claims (4)
1. the device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process, it is to include storage raw water box, intake pump, biochemistry
The continuous flow reactor of reactor, sedimentation basin, the continuous flow reactor are connected with PLC, it is characterised in that：
The raw water box is provided with blow-down pipe and overflow pipe, and the blow-down pipe of the raw water box is provided with Self controlling valve；The raw water box leads to
The water inlet pipe that intake pump is crossed with the biochemical reactor is connected；
The biochemical reactor includes promising anaerobic zone, aerobic zone and anoxic zone；
The sedimentation basin is provided with mud return line, supernatant delivery pipe, outlet pipeline；The outlet pipeline is located at sedimentation basin
Middle top；The sedimentation basin is connected with anaerobic zone and anoxic zone respectively by mud return line, and mud return line is provided with simultaneously
Two sludge pumps and a mud valve；
The PLC uses SIEMENS 200, the PLC and the Self controlling valve, autocontrol switch, draining valve,
Mud valve, air volume regulating valve, gas flowmeter, online dissolved oxygen concentration meter, online ammonia nitrogen concentration meter, online nitrate concentration
Meter, online sludge concentration meter are connected；The PLC is also connected with computer.
2. the device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process according to claim 1, it is characterised in that：
The anaerobic zone is provided with speed-adjustable stir device, and the anaerobic zone is connected with water inlet pipe；
The anoxic zone is provided with speed-adjustable stir device, and the aerobic zone is provided with biologic packing material, diaphragm aeration head, air volume regulating valve, drum
Blower fan, gas flowmeter, check-valves；The air blower is connected by gas flowmeter and air volume regulating valve with diaphragm aeration head
Connect；
The speed-adjustable stir device of the anaerobic zone and the speed-adjustable stir device of anoxic zone, intake pump, air blower, sludge pump, supernatant row
Put pipe and be equipped with autocontrol switch.
3. the device of sludge segment reflux strengthened anaerobic ammoxidation denitrification process according to claim 1, it is characterised in that：
The Self controlling valve, autocontrol switch, draining valve, mud valve, air volume regulating valve, gas flowmeter are online autocontrol part；
The anaerobic zone and anoxic zone of the biochemical reactor are respectively equipped with online sludge concentration meter, and the aerobic zone is provided with online dissolved oxygen
Densimeter, online ammonia nitrogen concentration meter, the anoxic zone are provided with online nitrate concentration meter, and above-mentioned autocontrol part and online sludge are dense
Degree meter, the PLC of online dissolved oxygen concentration meter, online nitrate concentration meter and online ammonia nitrogen concentration meter with setting are entered
Row signal and control connect, and finally enter the computer being connected with PLC.
4. the method for sludge segment reflux strengthened anaerobic ammoxidation denitrification process, it is characterised in that：
Sewage flows through anaerobic zone, aerobic zone, anoxic zone and sedimentation basin successively, in anaerobic zone, activated sludge absorption degraded water inlet
In organic synthesis internal carbon source；By controlling dissolved oxygen in aerobic zone, the coupling of short-cut denitrification and Anammox is realized
Close, improve the nitrogen removal rate of system；Have steps of：
The first step, seed sludge：Biochemical reactor is according to volume ratio 1:1 inoculation municipal sewage plant's second pond returned sludge and
The short distance nitration sludge of the high ammonia-nitrogen sewage treatment system discharge of stable operation so that floc sludge concentration is in 4.5g/L；And from
Biofilm packing is taken to be seeded to aerobic zone in the high ammonia-nitrogen wastewater anaerobic ammonia oxidation reactor of stable operation, packing volume accounts for aerobic
The 20% of area's volume；
Second step, reactor start-up：Intake pump is opened, sewage is led into anaerobic zone from raw water box；The agitator of anaerobic zone is opened,
Promote muddy water mixing, strengthen mass transfer；Mixed liquor then goes through aerobic zone, and air blower is opened, while adjusts the valve of aerating pipelines
Door carries out low-oxygen aeration, controls the dissolved oxygen in reactor aerobic zone in 0.1-0.3mg/L；Mixed liquor enters anoxic zone, lacks
The agitator in oxygen area is opened, and promotes muddy water mixing；Subsequent mixed liquor enters sedimentation basin, and active sludge intermixture enters in sedimentation basin
Row mud-water separation, supernatant overflow water outlet are returned respectively as final outflow water, sedimentation basin bottom thickened sludge by sludge reflux pump
Anaerobic zone and anoxic zone are flow to, return sludge ratio is respectively 50% and 100%；
3rd step, reactor stable operation：By the data of the on-line monitoring equipment in system, the running situation of system is judged,
Adjust aeration quantity, sludge reflux amount and sludge volume simultaneously；When the dissolved oxygen concentration of aerobic zone is higher than 0.3mg/L or ammonia nitrogen concentration
During less than 5mg/L, the aeration quantity of air blower is reduced；When the dissolving oxygen concentration of aerobic zone is less than 0.1mg/L or ammonia nitrogen concentration
Higher than 8mg/L, the aeration quantity of air blower is improved；When the nitrate concentration of anoxic zone is higher than 5mg/L, the dirt to anoxic zone is improved
Mud backflow ratio；When the sludge concentration of anaerobic zone is higher than 5g/L, spoil disposal valve is opened, discharges excess sludge, it is dirty to reduce system
Mud concentration is to 4.5mg/L.
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Cited By (17)
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|---|---|---|---|---|
| CN108793398A (en) * | 2018-06-08 | 2018-11-13 | 北京工业大学 | The method and apparatus for coupling Anammox advanced nitrogen as the short-cut denitrification of carbon source using sludge fermentation mixture |
| CN109368792A (en) * | 2018-12-06 | 2019-02-22 | 北京工业大学 | The method and apparatus of sludge dual reflux AOA short distance nitration coupling Anammox and endogenous denitrification Treating Municipal Sewage |
| CN109485152A (en) * | 2018-12-19 | 2019-03-19 | 北京工业大学 | A kind of apparatus and method of continuous flow municipal sewage short-cut denitrification part ANAMMOX advanced nitrogen dephosphorization |
| CN110015757A (en) * | 2019-04-30 | 2019-07-16 | 北京工业大学 | The method and apparatus of the endogenous short-cut denitrification coupling Anammox Treating Municipal Sewage in AOA technique anoxic zone |
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| CN112811715A (en) * | 2020-12-28 | 2021-05-18 | 吉林农业大学 | Sewage treatment system utilizing primary sludge fermentation |
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| CN114772870B (en) * | 2022-05-24 | 2023-10-31 | 湖南五方环境科技研究院有限公司 | Sewage treatment device and method for continuous flow particle size controllable sludge particles |
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