CN110156152A - A kind of quick short distance nitration starting method and its application - Google Patents
A kind of quick short distance nitration starting method and its application Download PDFInfo
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- CN110156152A CN110156152A CN201910054485.5A CN201910054485A CN110156152A CN 110156152 A CN110156152 A CN 110156152A CN 201910054485 A CN201910054485 A CN 201910054485A CN 110156152 A CN110156152 A CN 110156152A
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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
- C02F3/006—Regulation methods for biological treatment
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F2209/14—NH3-N
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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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The present invention relates to the technical field of Sewage Biological Treatment, in particular to a kind of quick short distance nitration starts method and its application.The present invention includes: that nitrifying sludge is inoculated in SBR；Rubbish leachate is imported into SBR；Air Exposure is carried out to the mixture of rubbish leachate and nitrifying sludge, controlling dissolved oxygen concentration in SBR is 0.6~0.8mg/L, and precipitating and drainage sunk well are carried out after Air Exposure；Repeat above step 2-3；The dissolved oxygen concentration for adjusting rubbish leachate is 0.25~0.45mg/L, and precipitating and drainage sunk well are carried out after Air Exposure, repeats the step, and the cycle of operation is 10-30 times；When the nitrite accumulation rate of SBR is greater than 80%, short distance nitration is successfully started up.Quick short distance nitration starting method of the invention is able to achieve the processing of rubbish leachate deamination.
Description
Technical field
The present invention relates to the technical field of Sewage Biological Treatment, in particular to a kind of quick short distance nitration starting method and
It is applied.
Background technique
A kind of mode of the waste incineration and generating electricity as processing house refuse needs to carry out heap ferment to rubbish before burning away the refuse
Processing is to leach moisture, improve calorific value.A large amount of rubbish leachates, water quality complexity, organic matter, ammonia can be generated during heap ferment
Nitrogen content is high, into after water body, be easy to cause water eutrophication.Since newly generated rubbish leachate has height organic negative
The characteristics of lotus, generally first passes through anaerobic bio-treated, and treated, and rubbish leachate ammonia-nitrogen content is high, and carbon-nitrogen ratio is low.Cause
This, the denitrification process processing rubbish leachate for seeking a kind of economical and efficient becomes the key content of field of water pollution control research.
Traditional biological denitrogenation technology mainly includes two steps: nitrification and denitrification.Firstly, under aerobic condition, waste water
In ammonia nitrogen nitrite is oxidized to by ammonia oxidizing bacteria (AOB), then nitrite is by nitrite-oxidizing bacteria (NOB) oxygen
Nitrate is turned to, later under conditions of anaerobism, the nitrate reduction of generation is nitrous acid using organic matter by denitrifying bacterium
Salt, last Nitrite transformation are generated as nitrogen.Traditional biological denitrogenation technology needs enough aeration quantity and addition a large amount of organic
Carbon source the problems such as to solve the generally existing high energy consumption of traditional biological denitrification process, high operating cost, has emerged in large numbers one in recent years
It criticizes using short distance nitration as the Process of Biological Nitrogen Removal of core, such as short-cut nitrification and denitrification technique, short distance nitration-anaerobic ammonia oxygen
Chemical industry skill.
Short distance nitration is by control condition by NH4 +- N is oxidized to NO2 -- N, and it is avoided to be further converted to NO3 --N。
It can reduce by 25% aeration quantity compared with traditional biological denitrogenation technology subsequently through denitrification and 40% carbon source adds, and
Sludge yield reduces, and nitrifying process reduces by 35%, and denitrification process reduces by 55%.Since short distance nitration has many advantages, such as,
Sewage treatment field receives more and more attention.
But since rubbish leachate has ammonia-nitrogen content high, the low feature of carbon-nitrogen ratio, there is presently no it is a kind of can be
The method of success quick start short distance nitration in rubbish leachate.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of quick short distance nitration startings suitable for rubbish leachate
Method, to realize the short distance nitration quick start of rubbish leachate.
In order to achieve the above objectives, the present invention provides following technical scheme, comprising the following steps:
Nitrifying sludge is inoculated into sequence bioreactor by step 1；
The ammonia nitrogen concentration of rubbish leachate is diluted to 250 ± 5mg/L, and imports sequence bioreactor by step 2
In, rubbish leachate and nitrifying sludge are stirred；
Step 3 carries out Air Exposure to the mixture of rubbish leachate and nitrifying sludge, controls the batch-type biology
Dissolved oxygen concentration in reactor is 0.6~0.8mg/L, and precipitating and drainage sunk well are successively carried out after Air Exposure；
Step 4, repeatedly step 2-3, the cycle of operation 5 times；
The ammonia nitrogen concentration of rubbish leachate is diluted to 750 ± 20mg/L by step 5, adjusts the batch-type biological respinse
The dissolved oxygen concentration of device is 0.25~0.45mg/L, then carries out Air Exposure, then successively carries out precipitating and drainage sunk well；
Step 6 repeats step 5, cycle of operation 10-30 times；
Step 7, in step 6, the nitrite accumulation rate of the mixture of the rubbish leachate and nitrifying sludge is greater than
80%, short distance nitration successfully starts up.
Wherein, in step 2 and step 5, rubbish leachate is diluted to meet rubbish leachate using tap water
The ammonia nitrogen concentration of the demand of ammonia nitrogen concentration, conventional rubbish leachate is greater than 800mg/L.
It should be noted that drainage sunk well is specially that the water being discharged is to react in sequence bioreactor in step 3
The water after reacting in reactor is discharged in water afterwards, just can be carried out step 2 and imports new ammonia nitrogen concentration and is diluted to 250 ± 5mg/L
Rubbish leachate, and then repeat step 2-3 operation；In step 5, drainage sunk well is specially that the water being discharged is batch-type life
The water after reacting in reactor is discharged in water after reacting in object reactor, and just can be carried out step 5, to import new ammonia nitrogen concentration dilute
It is interpreted as the rubbish leachate of 750 ± 20mg/L, and then repeats the operation of step 5.
Preferably, in step 3, the aeration time is 11h, and the sedimentation time is 40min, and the water discharge time is
20min。
Wherein, rubbish leachate imports the time of sequence bioreactor as 1h.
Preferably, in step 3, draining is than being 50%.
Preferably, in step 5, the aeration time is 11h, and the sedimentation time is 40min, and the water discharge time is
20min。
Preferably, in step 5, draining is than being 50%.
Preferably, in step 2 and step 5, the COD before the rubbish leachate dilution is 703~1624 mg/L.
Preferably, the BOD in step 2 and step 5, before the rubbish leachate dilution5For 253~506 mg/L.
Preferably, the NH in step 2 and step 5, before the rubbish leachate dilution4 +- N concentration is 1136mg/L.
It should be noted that the rubbish leachate is the rubbish leachate before step 2 and step 5 dilution.
Preferably, step 1 further includes eluriating to the digested sludge, is eluriated to remove ammonia nitrogen, the Asia of digested sludge
Nitrate nitrogen and nitrate nitrogen impurity.
Preferably, the elutriation is specially to be eluriated using water to the digested sludge.
The present invention also provides quick short distance nitrations to start method in the application of rubbish leachate deamination.
It should be noted that the time that rubbish leachate imports SBR is 60min, rubbish leachate and nitrifying sludge it is mixed
The aeration time of object is closed as 660min, the sedimentation time of the mixture of rubbish leachate and nitrifying sludge is 40min, rubbish drip
The water discharge time of filtrate is 20min.
Compared with prior art, the beneficial effects of the present invention are:
Sequence bioreactor (SBR) short distance nitration that the invention discloses a kind of suitable for rubbish leachate is quick
Starting method.Initial stage is controlled rubbish leachate and is started with its lower ammonia nitrogen concentration, and nitrifying sludge is made to adapt to the water of rubbish leachate
Matter, stepping up the ammonia nitrogen concentration of the water inlet of rubbish leachate later, (SBR system contains rubbish leachate to improve SBR system
With the mixture of nitrifying sludge) interior free ammonia (FA) concentration to be to inhibit the activity of nitrite oxidizing bacteria (NOB) and cooperate low molten
Solve oxygen (DO) operation reserve.The high accumulation rate of nitrite is realized from starting to, and the dissolved oxygen (DO) of SBR system controls in the early stage
In 0.6~0.8mg/L, it is then limited in 0.25~0.45mg/L, was run through 5-15 days, the nitrite accumulation of SBR system
Rate reaches 91.4%, successfully realizes rubbish leachate in the short distance nitration quick start of SBR system.The present invention is in true rubbish
Under the condition of water quality of leachate, opening for short distance nitration is fast implemented by controlling dissolved oxygen concentration and stepping up ammonia nitrogen concentration
It is dynamic.Its process aeration quantity is few, greatlys save operating cost.
The DO of the SBR system for starting early period of the invention is 0.6~0.8mg/L, horizontal in a reduction, but SBR system
NOB still has certain quantity and activity in uniting, therefore initial stage SBR system is still in the complete nitrification stage, but pushing away with the time
It moves, the DO's of SBR system further decreases and the brought rubbish leachate of the raising of the influent ammonium concentration of rubbish leachate
The increase of FA concentration, AOB is greater than NOB to the affinity (DO semi-saturation constant is 0.3mg/L) of DO, and (DO semi-saturation constant is
1.1mg/L), and to the tolerable concentration of FA (10~150mg/L) it is higher than NOB (0.1~1mg/L), therefore NOB is suppressed,
The value-added speed of AOB is much higher than NOB, gradually eliminates SBR system for NOB.Therefore, by control DO in 0.6~0.8mg/L
It is real in the control strategy of the aeration strategy of 0.25~0.45mg/L and the influent ammonium concentration for stepping up rubbish leachate to DO
The starting that rubbish leachate is nitrified in SBR medium or short range is showed.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
The embodiment of the present invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to the attached drawing of offer.
Fig. 1 is ammonia nitrogen removal load diagram in the SBR of the embodiment of the present invention 1, wherein is intake as rubbish leachate water inlet ammonia
Nitrogen concentration, is discharged and is discharged ammonia nitrogen concentration for reactor, and ARR is ammonia nitrogen removal rate curve；
Fig. 2 is nitrite accumulation schematic diagram in the SBR of the embodiment of the present invention 1, wherein is intake as rubbish leachate Asia
Nitrate concentration and nitrate concentration are discharged nitrite concentration and nitrate concentration for reactor water outlet, and NAR is nitrous
Hydrochlorate accumulation rate curve.
Wherein, SBR is sequence bioreactor.
Specific embodiment
There is provided a kind of quick short distance nitrations suitable for rubbish leachate to start method for core of the invention, convenient
To the quick start short distance nitration of rubbish leachate, the processing of rubbish leachate deamination is realized.
Rubbish leachate source used in following embodiment are as follows: be with the rubbish leachate that somewhere garbage burning factory generates
Basic water, specific water quality are as follows: COD=703~1624mg/L, BOD5=253~506mg/L, NH4 +- N=1136mg/L,
NO2 -- N=0.6mg/L, NO3 -- N=23mg/L, basicity are 6373mg CaCO3/ L, pH=7.97；Nitrifying sludge is complete nitrification
Sludge, from the aerobic tank of sewage treatment.
Embodiment 1
The embodiment of the invention provides a kind of quick short distance nitrations to start method, comprising the following steps:
Step 0, reactor use sequence bioreactor (SBR), and SBR is equipped with aeration and agitating device, pass through adjusting
Dissolved oxygen in air pump and flowmeter control SBR, outside has insulating layer, can carry out water-bath heat preservation；SBR is interior equipped with pH and molten
Solve oxygen probe；SBR is circumscribed with simple self-con-tained unit, automatically controls stirring, aeration time and realizes Inlet and outlet water automatically；
Step 1, at 28 ± 1 DEG C, nitrifying sludge is inoculated in SBR, the inoculum density of nitrifying sludge is 5500mg/L；
Step 2 imports rubbish leachate in SBR, and rubbish leachate is mixed with nitrifying sludge, obtains rubbish leaching
The mixture of liquid and nitrifying sludge, wherein the ammonia nitrogen concentration of rubbish leachate is 250 ± 5 mg/L, when rubbish leachate imports
Between be 1h；
Step 3 carries out Air Exposure to the mixture of rubbish leachate and nitrifying sludge, and rubbish leachate and nitrification are dirty
The dissolved oxygen concentration of the mixture of mud is 0.6~0.8mg/L, and precipitating and drainage sunk well are successively carried out after Air Exposure, wherein
Water inlet (aeration) time 1h, aeration time 10h, sedimentation time 40min, water discharge time 20min；
Step 4 repeats step 2-3, and the cycle of operation 5 times, a cycle time is 12h, is total up to 2.5 days；
Rubbish leachate is imported SBR progress Air Exposure by step 5, adjusts the mixing of rubbish leachate and nitrifying sludge
The dissolved oxygen concentration of object is 0.25~0.45mg/L, and precipitating and drainage sunk well are successively carried out after Air Exposure, wherein water inlet (exposes
Gas) time 1h, aeration time 10h, sedimentation time 40min, water discharge time 20min, the ammonia nitrogen concentration of rubbish leachate
For 750 ± 20mg/L；
Step 6, repetition step 5, the cycle of operation 30 times, a cycle 12h；
Step 7, in step 6, the nitrite accumulation rate of the mixture of rubbish leachate and nitrifying sludge reaches
91.4%, ammonia nitrogen removal rate reaches 652mg/ (Ld), and short distance nitration successfully starts up.
Appropriate complete nitrification sludge is put into SBR, is passed through the rubbish leachate after diluting, control reactor draining
Than being 50%, period 12h.Start to start reactor with lower ammonia nitrogen concentration (250 ± 5mg/L), sludge is made to adapt to water
Matter, after step up influent ammonium concentration to 750 ± 20mg/L, make system that there is higher free ammonia (FA) concentration, to reactor
Middle nitrite oxidizing bacteria (NOB) is inhibited.Before 15d start-up course the control of 2.5d system dissolved oxygen (DO) concentration 0.6~
0.8mg/L, then control is in 0.25~0.45mg/L.With this condition continue acclimation sludge, calculate nitrite accumulation rate and
Ammonia nitrogen removal rate, nitrite accumulation rate reach 91.4%, and ammonia nitrogen removal rate reaches 652mg/ (Ld), i.e., successfully opens
Dynamic short distance nitration.
Nitrite accumulation rate 1 calculates determination according to the following equation:
Wherein, NAR-nitrite accumulation rate；
ρ (NO2-) eff-water outlet nitrite concentration, unit mg/L；
ρ (NO3-) efff-water outlet nitrate concentration, unit mg/L；
Ammonia nitrogen removal rate 2 calculates determination according to the following equation:
Wherein, ARR-ammonia nitrogen removal rate, unit are mg/ (Ld)；
ρ (NH4+) inf-influent ammonium concentration, unit mg/L；
ρ (NH4+) leff-upper period is discharged ammonia nitrogen concentration, unit mg/L；
ρ(NH4 +) eff-water outlet ammonia nitrogen concentration, unit mg/L；
Q-draining ratio, is herein 50%；
E-reaction time, unit d are herein 0.5.
As a result as depicted in figs. 1 and 2, Fig. 1 is the ammonia nitrogen removal effect picture of startup stage in the present embodiment SBR, and Fig. 2 is
Nitrite and nitrate concentration variation and nitrite accumulation rate trend chart in SBR, short distance nitration starting of the invention
Beforehand control dissolved oxygen (DO) concentration is 0.6~0.8mg/L, so that nitrifying sludge is adapted to the water quality of rubbish leachate and keeps one
Fixed ammoxidation effect.DO concentration is reduced since the 2.5th day to 0.25~0.45mg/L, and steps up rubbish leachate
Ammonia nitrogen concentration to 750 ± 20mg/L, increase free ammonia (FA) concentration that SBR imports rubbish leachate, to inhibit nitrous acid oxygen
Change bacterial growth, is enriched with ammonia nitrogen by the quantity of ammonia oxidizing bacteria, nitrifying sludge is made to turn to short distance nitration from complete nitrification.By Fig. 2
It is found that ammonia nitrogen removal rate steps up with the passage of starting time, it is up to 652mg/ (Ld).By Fig. 2 it is found that
Preceding 3 days of starting, the height of nitrate concentration derived from rubbish leachate, and nitrite concentration is substantially zeroed, illustrate sludge still in
The complete nitrification stage, after the raising of ammonia nitrogen concentration that imports with rubbish leachate and the reduction of DO concentration in SBR, the Central Asia SBR
Nitrate starts to accumulate, and nitrate concentration is gradually reduced in SBR, after 12.5 days (25 periods), nitrite in SBR
Accumulation rate reaches 80% or more, up to 91.4%, indicates that the realization of rubbish leachate SBR short distance nitration successfully starts up.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, defined herein
General Principle can realize in other embodiments without departing from the spirit or scope of the present invention.Therefore, originally
Invention is not intended to be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty
The consistent widest scope of point.
Claims (10)
1. a kind of quick short distance nitration starts method, which comprises the following steps:
Nitrifying sludge is inoculated into sequence bioreactor by step 1；
The ammonia nitrogen concentration of rubbish leachate is diluted to 250 ± 5mg/L, and imports the sequence bioreactor by step 2
In, rubbish leachate and the nitrifying sludge are stirred；
Step 3 carries out Air Exposure to the mixture of rubbish leachate and the nitrifying sludge, and it is anti-to control the batch-type biology
Answering the dissolved oxygen concentration in device is 0.6~0.8mg/L, and precipitating and drainage sunk well are successively carried out after Air Exposure；
Step 4, repeatedly step 2-3, the cycle of operation 5 times；
The ammonia nitrogen concentration of rubbish leachate is diluted to 750 ± 20mg/L, and imports the sequence bioreactor by step 5
In, adjust the sequence bioreactor dissolved oxygen concentration be 0.25~0.45mg/L, then carry out Air Exposure, then according to
It is secondary to carry out precipitating and drainage sunk well；
Step 6 repeats step 5, cycle of operation 10-30 times；
The nitrite accumulation rate of step 7, in step 6, the mixture of the rubbish leachate and nitrifying sludge is greater than 80%,
Short distance nitration successfully starts up.
2. quick short distance nitration according to claim 1 starts method, which is characterized in that in step 3, the aeration time
For 11h, the sedimentation time is 40min, and the water discharge time is 20min.
3. quick short distance nitration according to claim 1 starts method, which is characterized in that in step 3, draining ratio is
50%.
4. quick short distance nitration according to claim 1 starts method, which is characterized in that in step 5, the aeration time
For 11h, the sedimentation time is 40min, and the water discharge time is 20min.
5. quick short distance nitration according to claim 1 starts method, which is characterized in that in step 5, draining ratio is
50%.
6. quick short distance nitration according to claim 1 starts method, which is characterized in that described in step 2 and step 5
COD before rubbish leachate dilution is 703~1624mg/L.
7. quick short distance nitration according to claim 1 starts method, which is characterized in that described in step 2 and step 5
BOD before rubbish leachate dilution5For 253~506mg/L.
8. quick short distance nitration according to claim 1 starts method, which is characterized in that described in step 2 and step 5
NH before rubbish leachate dilution4 +- N concentration is 1136mg/L.
9. quick short distance nitration according to claim 1-8 starts method, which is characterized in that step 1 further includes
The digested sludge is eluriated.
10. application of the described in any item quick short distance nitration starting methods of claim 1-8 in rubbish leachate deamination.
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| CN116835770A (en) * | 2023-09-01 | 2023-10-03 | 河北协同水处理技术有限公司 | Quick start method based on short-cut nitrification of coking wastewater |
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| CN115140890A (en) * | 2022-06-27 | 2022-10-04 | 华沃德源环境技术(济南)有限公司 | Kitchen waste pretreatment method |
| CN115140890B (en) * | 2022-06-27 | 2024-03-15 | 华沃德源环境技术(济南)有限公司 | Kitchen waste pretreatment method |
| CN116835770A (en) * | 2023-09-01 | 2023-10-03 | 河北协同水处理技术有限公司 | Quick start method based on short-cut nitrification of coking wastewater |
| CN116835770B (en) * | 2023-09-01 | 2023-11-14 | 河北协同水处理技术有限公司 | Quick start method based on short-cut nitrification of coking wastewater |
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Application publication date: 20190823 |