CN209702394U - A kind of strengthened anaerobic ammoxidation activity improves the device of aerobic nitrogen removal - Google Patents
A kind of strengthened anaerobic ammoxidation activity improves the device of aerobic nitrogen removal Download PDFInfo
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- CN209702394U CN209702394U CN201920220517.XU CN201920220517U CN209702394U CN 209702394 U CN209702394 U CN 209702394U CN 201920220517 U CN201920220517 U CN 201920220517U CN 209702394 U CN209702394 U CN 209702394U
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Abstract
A kind of strengthened anaerobic ammoxidation activity improves the device of aerobic nitrogen removal, belongs to field of waste water treatment.System is monitored equipped with cylindrical type reaction unit, water inlet system, drainage system, stirring system, aerating system, temperature control system, medicine system, DO and pH.Strengthened anaerobic ammoxidation activity improve aerobic nitrogen removal technique realization condition be inherently nitrifying bacteria community (mainly including anaerobic ammonium oxidizing bacteria, ammonia oxidizing bacteria and nitrite-oxidizing bacteria two major classes bacterium) structure optimization, nitrite-oxidizing bacteria i.e. as far as possible in inhibition system improves the activity of anaerobic ammonium oxidizing bacteria and ammonia oxidizing bacteria.
Description
Technical field
The utility model relates to a kind of sewage disposal technology, specifically strengthened anaerobic ammoxidation activity improves aerobic nitrogen removal
Apparatus and method, especially in traditional activated sludge process strengthened anaerobic ammoxidation activity improve the device of aerobic nitrogen removal with
Method is conducive to cost-effective control water body nitrate pollution suitable for the denitrogenation processing of city domestic sewage, and it is de- to improve sewage
Nitrogen efficiency saves denitrogenation cost, belongs to wastewater treatment method field.
Background technique
With the rapid development of industrial or agricultural and the raising of living standards of the people, water environmental problems increasingly cause people's
Concern.Traditional activated sludge process is the sewage denitrification method that current sewage treatment plant generallys use, and mainly includes nitrification-denitrification
Process.Nitrifying process refers to first under the action of ammonia oxidizing bacteria (AOB), converts nitrite nitrogen for ammoniacal nitrogen；Then sub-
Nitrate nitrogen is converted into nitrate nitrogen under the action of nitrite-oxidizing bacteria (NOB).Denitrification refers in anoxic and presence
Under conditions of organic carbon source, nitrate nitrogen and nitrite nitrogen are reduced to N under the action of denitrifying bacterium2Process.
Sequencing batch active sludge (SBR) is one of traditional activated sludge process main method, combines into water, exposes
Gas, precipitating and the reaction system of draining, with process is simple, the method for operation is flexible, technique adjustment is convenient, biochemical reaction effect is good
The advantages that.Sewage treatment plant extremely pays close attention to sewage water denitrification efficiency and denitrogenation cost at present, and sequencing batch active sludge exposes
Large-minded, the additional a large amount of carbon source of needs.Therefore, it can be improved by strengthening the activity of anaerobic ammonia oxidizing bacteria in activated sludge
Aeration phase total nitrogen removal, to reduce operating cost.
Austria scientist Broda in 1977 proposes a kind of oxidation ammoniacal nitrogen coupling nitrate nitrogen or nitrite nitrogen is also primary
At the inorganic autotrophic microbe of nitrogen；Nineteen ninety-five, Dutch scientist Mulder have found anaerobism in denitrification bioreactor
Ammonia oxidation bacteria.Anaerobic ammonia oxidizing bacteria is a kind of autotrophic bacteria, belongs to floating mould door；It is using carbon dioxide or carbonate as carbon
Source is reacted using ammonium salt as electron donor, nitrite as electron acceptor.Anammox reaction is without additional organic
Carbon source is as electron donor, while save the cost, it is therefore prevented that adds the secondary pollution of carbon source generation；Only need to by water inlet about
50% ammonium oxidation is nitrite nitrogen, saves oxygen supply power consumption；It is nearly free from N2O in reaction process, avoids biography
The greenhouse gas emission generated in system nitrification-denitrification process；Microorganism value-added speed is slow, and sludge output is few.Therefore, anaerobism ammonia
Oxidation bacteria is bacterium important in sewage treatment, but its inhibition that will receive DO, organic matter in traditional activated sludge process, this
A kind of method with regard to needing strengthened anaerobic ammoxidation activity to improve aerobic nitrogen removal.
Utility model content
The purpose of the utility model is to provide device and sides that a kind of strengthened anaerobic ammoxidation activity improves aerobic nitrogen removal
Method is conducive to the active regulation method of strengthened anaerobic ammoxidation by the way that application is various, provides optimal environmental control parameters, reach
The active effect of strengthened anaerobic ammoxidation.
The technical solution of the utility model is:
A kind of strengthened anaerobic ammoxidation activity improves the device of aerobic nitrogen removal, it is characterised in that: is equipped with cylindrical type and reacts
Device, water inlet system, drainage system, stirring system, aerating system, temperature control system, medicine system, DO and pH monitor system, into
Water system are as follows: inlet tank passes sequentially through to be connected at the top of immersible pump, water inlet pipe and cylindrical reactor；In cylindrical reactor bottom
Drainage system, drainage system are as follows: be connected to by drainpipe with water tank are equipped at upward 1/5；Stirring system: it is reacted in cylindrical type
The agitating paddle inside cylindrical reactor is driven to rotate by motor at the top of device；Aerating system: bottom fills in cylindrical reactor
There is an aeration disk, aeration disk is connect by gas rotameter with air pump, and aeration quantity is controlled；Temperature control system: heating
Stick and temp probe are extend into cylindrical reactor, and heating rod and temp probe are connect with temperature control device, carry out temperature
Monitoring；Medicine system includes two parts, and a part is the device for adding carbon source, is equipped with a dosing on cylindrical reaction unit top
Mouthful, for adding carbon source；Another part is the device of manganese addition solion, cylindrical reactor side bottom pass sequentially through valve and
Peristaltic pump connects manganese ion solution；DO and pH monitor system: DO and pH probe is respectively protruding into cylindrical reactor, with hand-held
DO and the pH probe of digital multi-parameter meter (WTW) connection monitor the variation of DO and pH respectively.
In the dosing mouth of cylindrical reaction unit top setting, passes sequentially through valve and peristaltic pump is connect with ethanol solution.
Above-mentioned strengthened anaerobic ammoxidation activity improves the operation method of aerobic nitrogen removal, it is characterized in that being equipped with following step
It is rapid:
1) startup stage: before water inlet, the activated sludge for being derived from secondary settling tank is pumped into reactor using immersible pump.
The sanitary sewage of inlet tank is pumped into reactor using immersible pump later；Agitating device is opened, temperature control device is opened, makes temperature
Degree control is at 20-35 DEG C；Air pump is opened, flows a gas through and reactor is entered by aeration disk after glass rotameter
In, DO concentration is controlled in 20.-3.0mg/L by adjusting spinner flowmeter, into the aeration stirring stage, this stage is continuously supervised
DO and pH in examining system, when DO is flown up, nitrifying process terminates, and closes aeration；With c (NOx -: COD)=4-5 ratio
(concentration ratio, unit mg/L) adds carbon source into reactor, and when pH stablizes, denitrification process terminates, and closes agitating device,
It stands, after mud-water separation, water is discharged by drainpipe, a reaction time terminates, and changes sewage into next reaction
Period；And so on 7 days, after kind of mud activation recovering, DO concentration is controlled in 0.4-0.6mg/L, above-mentioned nitre is continued
Change-denitrification process, then into arrive normal operating phase；
2) normal operating phase: opening inlet valve, diving pump water inlet is then opened, by sanitary sewage to be processed by justifying
Cylindricality reactor head enters in sequence bioreactor, opens agitating device, is sufficiently mixed muddy water, adjusts rotor stream
Meter makes DO maintain 0.4-0.6mg/L, and most of ammoniacal nitrogen is oxidized to by sanitary sewage under the action of ammonia oxidizing bacteria
Nitrate nitrogen, minute quantity ammoniacal nitrogen are changed into nitrate nitrogen and nitrogen under the action of anaerobic ammonium oxidizing bacteria, i.e., when DO is flown up
Aeration is closed, later with c (NOx -: COD) ratio (concentration ratio, unit mg/L) of=4-5 adds carbon source, and sewage is in denitrification
It is nitrogen by nitrate-nitrogen reduction under the action of bacterium；Water outlet is drained into water tank after staticly settling；
3) strengthened anaerobic ammoxidation active phase: when reactor for treatment effect stability, i.e., total nitrogen is gone after step 2) aeration
When except being no longer changed, start to add divalent manganesetion solution into reactor, so that divalent manganesetion is dense in system
Degree is 3-5mg/L；Sanitary sewage is pumped into reactor by immersible pump first, then opens agitating device, while will add
The peristaltic pump of manganese addition solion is opened, and manganese ion solution is pumped into reactor with certain revolving speed, opens air pump later
Aeration is reacted, and when DO concentration is flown up, closes aeration；Then with c (NOx -: COD)=4-5 ratio (concentration ratio,
Unit is mg/L) add carbon source；It is drained after staticly settling.
The realization condition that strengthened anaerobic ammoxidation activity improves aerobic nitrogen removal technique is inherently that nitrifying bacteria community is (main
Including anaerobic ammonium oxidizing bacteria, ammonia oxidizing bacteria and nitrite-oxidizing bacteria two major classes bacterium) optimization of structure, i.e., press down as far as possible
Nitrite-oxidizing bacteria in system processed improves the activity of anaerobic ammonium oxidizing bacteria and ammonia oxidizing bacteria.
The apparatus and method that strengthened anaerobic ammoxidation activity provided by the utility model improves aerobic nitrogen removal are will to mention
High anaerobic ammonia oxidizing bacteria and ammonia oxidizing bacteria activity, inhibit the combined factors such as nitrite oxidizing bacteria activity together, specific to wrap
It includes:
1) system control is conducive to enriching ammonia oxidation bacterium under low DO concentration.According to the physiology of two quasi-microorganisms
Characteristic, in aerobic stage, since ammonia oxidizing bacteria is stronger than nitrite-oxidizing bacteria to the affinity of oxygen, ammonia oxidizing bacteria and Asia
The oxygen saturation constant of nitric acid oxidation bacterium is respectively 0.2-0.5mg/L and 1.2-1.5mg/L.Therefore lower dissolved oxygen concentration
Under, the growth rate of ammonia oxidizing bacteria is greater than the growth rate of nitrite-oxidizing bacteria.It runs, is conducive to this condition for a long time
Enriching ammonia oxidation bacterium.
2) system control is conducive to anaerobic ammonia oxidizing bacteria and plays a role under low oxygen concentration.It can inhibit to detest compared with high-solubility oxygen
Anaerobic ammonium oxidation bacterium reacts, and the influence under low concentration is relatively small；And ammonia oxidizing bacteria growth rate is greater than Asia under hypoxia condition
The growth rate of nitric acid salt oxidizing bacteria, this just provides possibility for the accumulation of nitrous, to be the reaction of anaerobic ammonia oxidizing bacteria
Provide matrix.
3) under hypoxia condition, system operating temperature is controlled at 25 DEG C, is conducive to improve ammonia oxidizing bacteria activity.Ammoxidation is thin
The optimum growth temp of bacterium is 25 DEG C -30 DEG C, therefore control system running temperature is conducive to the change bacterial growth of ammonia oxygen at 25 DEG C
And enrichment.
4) under hypoxia condition, Mn2+It can be improved the activity of anaerobic ammonia oxidizing bacteria.In the metabolic process, in addition to nitrite,
Anammox bacterium is also using Mn2+As electron acceptor.
5) pH value of sewage water to be processed in system (i.e. pH value of raw water, without outer adding medicine) within the scope of 7.0-7.5,
Be conducive to enriching ammonia oxidation bacterium.The optimal pH range of ammonia oxidizing bacteria and nitrite-oxidizing bacteria difference, respectively
7.0-8.5 and 6.5-7.5.Therefore it runs under these conditions for a long time, is conducive to the enrichment of ammonia oxidizing bacteria.
The strengthened anaerobic ammoxidation activity of the utility model improves the apparatus and method of aerobic nitrogen removal compared with processing city
The technology of city's sanitary sewage is compared, and is had the advantage that
1) energy conservation and consumption reduction effects are good.Most of expense of sewage treatment plant is consumed for power consumption and medicine, however low dissolved oxygen drops
Low power consumption, anaerobic ammonia oxidizing bacteria is active to improve the yield for reducing nitrate, to reduce medicine consumption.
2) high reliablity.SBR is suitable for the sanitary sewage disposal that water quality and quantity changes Small Urban greatly.
3) capital cost and operating cost are low.The capital cost and operating cost of SBR will be lower than conventional activated sludge process
Expense.
4) simple process.Conditioning tank and primary sedimentation pond can not be set under normal circumstances, while it is not necessary to set secondary sink
Shallow lake pond, returned sludge equipment, all processes are completed in a pond by temporal arrangement into water, reaction, precipitating
With draining etc. series of process process.
5) land occupation is saved.SBR compact layout saves land occupation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure: 1 inlet tank；2 immersible pumps；3 water inlet pipes；4 temperature control devices；5 heating rods；6 sample taps, mud discharging mouth；7 stirrings
Machine；8 agitating paddles；9 dosing mouth, 10 manganese ion solution；11 peristaltic pumps 1；12 air pumps；13 spinner flowmeters；14 aeration disks；
15DO probe；16pH probe；17 hand-held digital multi-parameter meters (WTW)；18 drainpipes；19 water tanks；20 cylindrical reaction units；
21 ethanol solutions；22 peristaltic pumps 2.
Fig. 2 is stable operation stage treatment effect figure in the embodiment of the present invention；
Fig. 3 is strengthened anaerobic ammoxidation active phase treatment effect figure in the embodiment of the present invention.
Specific embodiment
The utility model is explained with reference to the accompanying drawings and examples, but is not limited to following embodiment.
Embodiment 1:
Referring to attached drawing 1, strengthened anaerobic ammoxidation activity improves the device of aerobic nitrogen removal: be equipped with cylindrical type reaction unit,
Water inlet system, drainage system, stirring system, aerating system, temperature control system, medicine system, DO and pH monitor system.Cylindrical type is anti-
Answering device dischargeable capacity is 20L (20), is provided with 5 valves, sample tap (6) is identical with mud discharging mouth.Water inlet system passes through inlet tank
(1), it is connected at the top of immersible pump (2), water inlet pipe (3) and cylindrical reactor；It is equipped at cylindrical reactor bottom upward 1/5
Drainage system is connected to by drainpipe (18) with water tank (19)；Stirring system is made of blender (7) and agitating paddle (8)；
Reactor bottom connects equipped with aeration disk (14), aeration disk connection gas rotameter (13), gas rotameter
It connects air pump (12), controls aeration quantity；Temperature control device (4) adjusts reaction unit temperature by heating rod (5)；Chemicals dosing plant packet
Two parts are included, a part is the device for adding carbon source (21), passes through water inlet pipe, peristaltic pump 2 (22) and cylindrical reaction unit top
One dosing mouth (9) connection；Another part is the device of manganese addition solion (10), is connected by water inlet pipe, peristaltic pump 1 (11)
To at the valve of bottom the 1st；The DO probe (15) and pH probe (16) connected using hand-held digital multi-parameter meter (WTW) (17)
The variation of DO and pH is monitored respectively.
The method that strengthened anaerobic ammoxidation activity improves aerobic nitrogen removal, using actual domestic wastewater as experimental subjects: NH4 +- N=60mg/L, pH=7.0-7.5, selected SBR volume are 22L, and operation method is completed according to the following steps:
1) startup stage: before water inlet, the activated sludge for being derived from secondary settling tank is pumped into reactor using immersible pump.
The sanitary sewage of inlet tank is pumped into reactor using immersible pump later, inflow 20L；Open agitating device, revolving speed
For 160rpm；Temperature control device is opened, makes temperature control at 25 DEG C；Air pump is opened, after flowing a gas through glass rotameter
It is entered in reactor by being aerated disk, is controlled DO concentration in 2.5mg/L or so, into exposure by adjusting spinner flowmeter
The gas agitating stage.DO and pH in this stage continuous monitor system, when DO is flown up, nitrifying process terminates, and closes and exposes
Gas；The ethanol solution that 0.1L concentration is 2% is pumped into reactor with the revolving speed of 34rpm using peristaltic pump, when pH changes very
When being slowly basicly stable, denitrification process terminates, and closes agitating device；It stands, it, will by drainpipe after mud-water separation
Water discharge, terminates a reaction time, changes sewage into next reaction time.And so on 7 days, to kind of mud activation recovering it
Afterwards, DO concentration is controlled in 0.5mg/L or so, continues above-mentioned nitrification-denitrification process, operate normally rank then into arriving
Section.
2) normal operating phase: opening inlet valve, diving pump water inlet is then opened, by sanitary sewage to be processed by justifying
Cylindricality reactor head enters in sequence bioreactor, opens agitating device, is sufficiently mixed muddy water, adjusts rotor stream
Meter makes DO maintain 0.5mg/L, and sanitary sewage is oxidized to nitre state under the action of ammonia oxidizing bacteria, by most of ammoniacal nitrogen
Nitrogen, minute quantity ammoniacal nitrogen are changed into nitrate nitrogen and nitrogen under the action of anaerobic ammonium oxidizing bacteria, i.e., after DO is flown up
Aeration is closed, the ethanol solution that 0.1L concentration is 1.4% is pumped into reactor with the revolving speed of 34rpm using peristaltic pump, it is dirty
Nitrate-nitrogen reduction is nitrogen under the action of denitrifying bacterium by water；Water outlet is drained into water tank after staticly settling.
3) strengthened anaerobic ammoxidation active phase: when the treatment effect of reactor aeration phase is stablized, start to reaction
Divalent manganesetion solution is added in device.Before water inlet, first with MnCl2Solid prepares Mn2+Solution, Mn2+Concentration is 600mg/
L, volume 0.1L.Sanitary sewage is pumped into reactor by immersible pump, then opens agitating device, while manganese will be added
The peristaltic pump of solion is opened, and is pumped into 0.1L manganese ion solution in reactor in 1min with the revolving speed of 34rpm, later
It opens air pump aeration to be reacted, when DO concentration is flown up, closes aeration；It will with the revolving speed of 34rpm using peristaltic pump
The ethanol solution that 0.1L concentration is 1.2% is pumped into reactor；It is drained after staticly settling.
Claims (2)
1. the device that a kind of strengthened anaerobic ammoxidation activity improves aerobic nitrogen removal, it is characterised in that: be equipped with cylindrical type reaction dress
It sets, water inlet system, drainage system, stirring system, aerating system, temperature control system, medicine system, DO and pH monitoring system, water inlet
System are as follows: inlet tank passes sequentially through to be connected at the top of immersible pump, water inlet pipe and cylindrical reactor；Cylindrical reactor bottom to
Drainage system, drainage system are as follows: be connected to by drainpipe with water tank are equipped at upper 1/5；Stirring system: in cylindrical reactor
Top drives the agitating paddle inside cylindrical reactor to rotate by motor；Aerating system: bottom is equipped in cylindrical reactor
One aeration disk, aeration disk are connect by gas rotameter with air pump, and aeration quantity is controlled；Temperature control system: heating rod
It is extend into cylindrical reactor with temp probe, heating rod and temp probe are connect with temperature control device, carry out temperature prison
It surveys；Medicine system includes two parts, and a part is the device for adding carbon source, is equipped with a dosing mouth on cylindrical reaction unit top,
For adding carbon source；Another part is the device of manganese addition solion, and cylindrical reactor side bottom passes sequentially through valve and compacted
Dynamic pump connection manganese ion solution；DO and pH monitors system: DO and pH probe is respectively protruding into cylindrical reactor, with hand-held number
DO and the pH probe of word multi-parameter meter (WTW) connection monitor the variation of DO and pH respectively.
2. a kind of strengthened anaerobic ammoxidation activity according to claim 1 improves the device of aerobic nitrogen removal, feature exists
In: in the dosing mouth of cylindrical reaction unit top setting, passes sequentially through valve and peristaltic pump is connect with ethanol solution.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109748393A (en) * | 2019-02-21 | 2019-05-14 | 北京工业大学 | A kind of strengthened anaerobic ammoxidation activity improves the apparatus and method of aerobic nitrogen removal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109748393A (en) * | 2019-02-21 | 2019-05-14 | 北京工业大学 | A kind of strengthened anaerobic ammoxidation activity improves the apparatus and method of aerobic nitrogen removal |
| CN109748393B (en) * | 2019-02-21 | 2023-12-01 | 北京工业大学 | Device and method for enhancing anaerobic ammonia oxidation activity and improving aerobic nitrogen removal |
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