CN105565493B - A kind of device and method of synchronous nitration and denitrification processing early stage landfill leachate depth denitrification - Google Patents
A kind of device and method of synchronous nitration and denitrification processing early stage landfill leachate depth denitrification Download PDFInfo
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- CN105565493B CN105565493B CN201510921452.8A CN201510921452A CN105565493B CN 105565493 B CN105565493 B CN 105565493B CN 201510921452 A CN201510921452 A CN 201510921452A CN 105565493 B CN105565493 B CN 105565493B
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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
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/16—Total nitrogen (tkN-N)
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Abstract
The present invention discloses a kind of device and method of synchronous nitration and denitrification processing early stage landfill leachate depth denitrification, the device includes landfill leachate storage water tank and sequencing batch reactor, the side of the landfill leachate storage water tank is equipped with water inlet pipe, the other side of the landfill leachate storage water tank is equipped with overflow pipe and evacuated tube, and the water inlet pipe connects sequencing batch reactor by peristaltic pump of intaking.Anaerobic stages of the present invention convert the volatile fatty acid VFAs of ready biodegradability in water inlet to the poly- β hydroxyl alkane acids fat PHAs of the slow intracellular of object degradation rate using the denitrification fusca xylanase of enrichment, and as the carbon source of synchronous nitration and denitrification in aerobic stage, realize the efficient removal without organic matter in landfill leachate under additional carbon and TN, reduce adding for a large amount of carbon sources, the method of operation is simple, substantially reduces operating cost.
Description
Technical field
The invention belongs to the processing of the biological denitrificaion of technical field of sewage more particularly to landfill leachate, specifically one
The device and method of kind synchronous nitration and denitrification processing early stage landfill leachate depth denitrification.
Background technology
Within the quite a long time from now on, sanitary landfills will also be as the main place of China's processing municipal refuse in China
Reason method.During municipal refuse is stacked and is filled, the pollutant contained by rubbish generated as organic matter decomposes it is water-soluble go out,
Landfill leachate is together formed with free water, precipitation and the underground water etc. that infiltrates in rubbish.Landfill leachate has ammonia
The features such as nitrogen content is high, organic concentration is high, pollutant kind is various, nutrient is out of proportion, seriously threatens ambient enviroment
Safety.2008, China promulgated stringenter landfill leachate discharge standard, and higher want is proposed to percolate processing
It asks, especially in terms of TN removals.
In general, early stage landfill leachate (garbage loading embeading time be less than 5 years) labile organic compound concentration is higher, phosphorus contains
Amount is very low, and COD/TN can generally be higher than 8, and wherein volatile fatty acid (VFAs) is the main component of organic matter.Traditional biological method
" nitrification/denitrification ", which handles landfill leachate denitrogenation, has the drawbacks such as high energy consumption, carbon source dosage be big.In recent years, synchronous nitre
Change denitrification (SND) technology increasingly to attract attention, which can simplify the design of reaction tank, reduce the volume of reaction tank.
In order to reach better synchronous nitration denitrification denitrogenation effect, need to keep similar ammonia oxidation speed rate and denitrification rate, carbon
Source, dissolved oxygen etc. are an important factor for realizing synchronous nitration and denitrification.It recent studies have shown that, it is deep in processing early stage landfill leachate
It spends in denitrification process, by the change of the method for operation, the control of operating parameter, can realize the degradable carbon source conversion of dissolubility
For the slow intracellular carbon source of degrading, and efficient synchronous nitration denitrification denitrogenation can be realized under micro- aerobic condition.
Invention content
It is an object of the invention to overcome defect of the existing technology, a kind of synchronous nitration and denitrification processing early stage is provided
The device and method of landfill leachate depth denitrification.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of device of synchronous nitration and denitrification processing early stage landfill leachate depth denitrification, which is characterized in that the dress
It sets and stores water tank and sequencing batch reactor including landfill leachate, the side of the landfill leachate storage water tank is equipped with water inlet
The other side of pipe, the landfill leachate storage water tank is equipped with overflow pipe and evacuated tube, and the water inlet pipe passes through peristaltic pump of intaking
Connect sequencing batch reactor.
It is used for stirring in reactor as blender preferably, in sequencing batch reactor of the present invention is further arranged,
Dissolved oxygen meter, pH analyzers, oxidation reduction potential determination instrument are set, it is mixed to be respectively used to measure muddy water in sequencing batch reactor
The dissolved oxygen value of conjunction liquid, pH value, oxidation reduction potential value, top setting sample tap, the drain valve of the sequencing batch reactor, institute
The bottom for stating sequencing batch reactor is equipped with aeration head, and the aeration head is connect with air compressor machine by gas flowmeter.
Invention additionally discloses a kind of methods using above-mentioned apparatus, include the following steps：
System starts：Take the sludge in refuse landfill in landfill leachate to sequencing batch reactor, sludge concentration is kept
5000-6000mg/L；Attachment device, using " anaerobic-aerobic-anoxic " method of operation, each period includes：Water inlet 5min, detest
Oxygen stirs 120min, aerobic aeration, anoxia stirring 30min, precipitation 30min, draining 5min；Each period water inlet ratio, draining ratio
It is 10%, for the control of aerobic stage dissolved oxygen in 0.4-0.6mg/L, the aeration end time is aobvious according to dissolved oxygen meter, pH analyzers
DO, pH the change curve real-time control shown differentiate that nitrification terminal stops air compressor machine aeration, and anoxic phases add 3-4g sodium acetates work
System nitrate nitrogen, nitrite nitrogen are removed for denitrifying carbon source；Sludge age is controlled in 20-30d；
System operation：Landfill leachate storage water tank is connected with sequencing batch reactor, early stage landfill leachate enters rubbish
Rubbish percolate stores water tank, and by intaking, peristaltic pump enters in sequencing batch reactor, and blender starts anaerobism stirring 120min, instead
Nitrification fusca xylanase converts the volatile fatty acid VFAs of ready biodegradability in landfill leachate to the slow born of the same parents of object degradation rate
Interior poly- beta-hydroxy-alkanoate PHAs；
After anaerobic stages, air compressor machine is opened, and adjusting tolerance by gas flowmeter carries out aerobic aeration, aerobic aeration
For the control of stage dissolved oxygen in 0.4-0.6mg/L, ammonia nitrogen degradation in mixed liquor is slowly nitrite nitrogen, nitrate nitrogen by nitrifier,
At the same time, denitrification fusca xylanase using intracellular PHA s and dissolubility degrade slow organic matter as the carbon source of synchronous nitration and denitrification into
The removal of nitrogen in row denitrification process, aeration end time change according to DO, pH that dissolved oxygen meter, pH analyzers are shown
Curve real-time control differentiates that nitrification terminal stops air compressor machine aeration, and precipitation 30min drains 5min, and water inlet ratio, draining ratio are 10%,
Sludge age is 20-30d.
As further preferably, the method for the present invention for differentiating nitrification terminal, stopping air compressor machine aeration is：Aeration is anti-
When between seasonable more than 0.5h, when the first derivative dpH/dt of pH in pH change curves sports positive number by negative, and DO concentration by
0.5mg/L is mutated to 1.5mg/L or more..
As further preferred, anaerobism agitation phases of the present invention：Oxidation reduction potential determination instrument measures oxidation also
Former current potential value ＜ -150 mV, nitrate nitrogen, nitrite nitrogen 10 mg/L of concentration ＜.
As further preferably, the carbon-nitrogen ratio COD/TN of early stage landfill leachate of the present invention is 8-10.
Beneficial effects of the present invention：Anaerobic stages of the present invention will easily be dropped using the denitrification fusca xylanase of enrichment into organism in water
The volatile fatty acid VFAs of solution property is converted into the poly- beta-hydroxy of the slow intracellular of object degradation rate-alkanoate PHAs, and aerobic
As the carbon source of synchronous nitration and denitrification in stage, realizes and gone without organic matter in landfill leachate under additional carbon and the efficient of TN
It removes, reduces adding for a large amount of carbon sources, the method for operation is simple, substantially reduces operating cost.
Description of the drawings
Fig. 1 is that the structure for the device that a kind of synchronous nitration and denitrification of the present invention handles early stage landfill leachate depth denitrification is shown
It is intended to.
In figure：1- landfill leachates store water tank, 11- water inlet pipes, 12- overflow pipes, 13- evacuated tubes, the reaction of 2- batch-types
Device, 21- are intake peristaltic pump, 22- blenders, and 23- is dissolved in analyzer, 24-pH analyzers, 25- oxidation reduction potential determination instrument,
26- aeration heads, 27- gas flowmeters, 28- air compressor machines, 29- sample taps, 210- drain valves..
Specific implementation mode
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1.A kind of device of synchronous nitration and denitrification processing early stage landfill leachate depth denitrification, including rubbish
Percolate stores water tank 1, sequencing batch reactor 2；The side that landfill leachate stores water tank 1 is equipped with water inlet pipe 11, and the other side is set
There are overflow pipe 12 and evacuated tube 13, water inlet pipe 11 to connect sequencing batch reactor 2 by peristaltic pump 21 of intaking；Sequencing batch reactor 2
Interior setting blender 22, dissolved oxygen meter 23, pH analyzers 24, oxidation reduction potential determination instrument 25 are respectively used to measure sequence
The dissolved oxygen value of muddy water mixed solution, pH value, oxidation reduction potential value in batch reactor 2, the top setting of sequencing batch reactor 2
The bottom of sample tap 29, drain valve 210, the sequencing batch reactor 2 is equipped with aeration head 26, the aeration head 26 and air compressor machine 28
It is connected by gas flowmeter 27.
For the landfill leachate generated using certain refuse landfill as raw water, specific water quality is as follows：The sewage of processing is typical case
Early stage landfill leachate, COD be 7381-12062 mg/L, ammonia nitrogen concentration be 717.9-1190.7 mg/L, total nitrogen TN concentration
Reach 8-10 for 886.4-1389.7 mg/L, COD/TN.Experimental rig is as shown in Figure 1, sbr reactor device uses organic glass system
At sbr reactor device dischargeable capacity is 10L.
Carrying out practically operation is as follows：
System start-up phase：
It takes in the sludge to sequencing batch reactor 2 of Biological Treatment of Landfill Leachate in refuse landfill, makes batch-type
Sludge concentration in reactor 2 is maintained at 5500mg/L.
It is that tap water dilutes the early stage landfill leachate after different multiples that landfill leachate, which stores the water inlet in water tank 1, is opened
Ammonia nitrogen concentration is gradually increased by continuously decreasing extension rate in 150-200 mg/L in dynamic preceding 10 days influent ammonium concentrations control
Until water inlet is former early stage landfill leachate.
Using " anaerobic-aerobic-anoxic " method of operation, each period includes：It intakes 5 min, anaerobism stirring 120min, good
Oxygen is aerated (real-time control), 30 min of anoxia stirring, 30 min of precipitation, draining 5min；Anaerobism agitation phases：Oxidation-reduction potential
Analyzer 25 measure oxidation reduction potential value ＜ -150 mV, nitrate nitrogen, nitrite nitrogen 10 mg/L of concentration ＜, each period into
Than being 10%, the control of aerobic stage dissolved oxygen is in 0.4-0.6mg/L, aeration end time method of discrimination for water ratio, draining：Aeration
When reaction time is more than 0.5h, when the first derivative dpH/dt of pH in pH change curves sports positive number, and DO concentration by negative
It is mutated to 1.5mg/L or more by 0.5mg/L., stop air compressor machine 28 and be aerated, anoxic phases add 3-4g sodium acetates as anti-
Nitrify carbon source removal system nitrate nitrogen, nitrite nitrogen；Sludge age is controlled in 20-30d.
When water inlet is not diluted early stage landfill leachate, within certain reaction time, nitrate nitrogen after aerobic aeration,
The concentration of nitrite nitrogen is less than 10mg/L, and system start completion need not add carbon source.
The system operation stage：
Landfill leachate is stored into water tank 1 and sequencing batch reactor 2 connects, early stage landfill leachate enters landfill leachate
Water tank 1 is stored, peristaltic pump 21 enters in sequencing batch reactor 2 by intaking, and blender 22 starts anaerobism and stirs 120min, anti-nitre
Change fusca xylanase and converts the volatile fatty acid VFAs of ready biodegradability in landfill leachate to the slow intracellular of object degradation rate
Poly- beta-hydroxy-alkanoate PHAs, anaerobism agitation phases：Oxidation reduction potential determination instrument 25 measures oxidation reduction potential value ＜-
150 mV, nitrate nitrogen, nitrite nitrogen 10 mg/L of concentration ＜；
After anaerobic stages, air compressor machine 28 is opened, and adjusting tolerance by gas flowmeter 27 carries out aerobic aeration, aerobic
Ammonia nitrogen degradation in mixed liquor is slowly nitrite nitrogen, nitre state in 0.4-0.6mg/L, nitrifier by the control of aeration phase dissolved oxygen
Nitrogen, at the same time, denitrification fusca xylanase degrade slow organic matter as the carbon of synchronous nitration and denitrification using intracellular PHA s and dissolubility
Source carries out the removal of nitrogen in denitrification process, and aeration end time method of discrimination is：When the aeration reaction time is more than 0.5h, when
The first derivative dpH/dt of pH sports positive number by negative in pH change curves, and dissolved oxygen concentration is mutated by 0.5mg/L to ＞
1.5mg/L stops air compressor machine 28 and is aerated, precipitates 30min, drains 5min, water inlet ratio, draining are than being 10%, sludge age 20-
30d。
Test result shows：Reach the synchronous removal of good organic matter, nitrogen under stable operation, TN removal rates are 96.17
± 0.51%, a concentration of 42.98 ± 4.89mg/L of TN are discharged, effluent COD concentration is 784.84 ± 63.00mg/L.
Above to a kind of dress of synchronous nitration and denitrification processing early stage landfill leachate depth denitrification provided by the present invention
It sets and method is described in detail, specific case used herein explains the principle of the present invention and embodiment
It states, the explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention；Meanwhile for this field
Those skilled in the art, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up institute
It states, the content of the present specification should not be construed as limiting the invention.
Claims (4)
1. a kind of method handling early stage landfill leachate depth denitrification device using synchronous nitration and denitrification, which is characterized in that
Include the following steps：
System starts：Take sludge in refuse landfill in landfill leachate to sequencing batch reactor（2）, sludge concentration holding
5000-6000mg/L；Attachment device, using " anaerobic-aerobic-anoxic " method of operation, each period includes：Water inlet 5min, detest
Oxygen stirs 120min, aerobic aeration, anoxia stirring 30min, precipitation 30min, draining 5min；Each period water inlet ratio, draining ratio
It is 10%, the control of aerobic stage dissolved oxygen is in 0.4-0.6mg/L, and the aeration end time is according to dissolved oxygen meter（23）, pH measure
Instrument（24）DO, pH change curve real-time control of display differentiate that nitrification terminal stops air compressor machine（28）Aeration, anoxic phases add
3-4g sodium acetates are as denitrifying carbon source removal system nitrate nitrogen, nitrite nitrogen；Sludge age is controlled in 20-30d；
System operation：Landfill leachate is stored into water tank（1）And sequencing batch reactor（2）Connection, early stage landfill leachate enter
Landfill leachate stores water tank（1）, pass through peristaltic pump of intaking（21）Into sequencing batch reactor（2）In, blender（22）Start
Anaerobism stirs 120min, and denitrification fusca xylanase converts the volatile fatty acid VFAs of ready biodegradability in landfill leachate to
The poly- beta-hydroxy of the slow intracellular of object degradation rate-alkanoate PHAs；
After anaerobic stages, air compressor machine（28）It opens, passes through gas flowmeter（27）It adjusts tolerance and carries out aerobic aeration, it is aerobic
Ammonia nitrogen degradation in mixed liquor is slowly nitrite nitrogen, nitre state in 0.4-0.6mg/L, nitrifier by the control of aeration phase dissolved oxygen
Nitrogen, at the same time, denitrification fusca xylanase degrade slow organic matter as the carbon of synchronous nitration and denitrification using intracellular PHA s and dissolubility
Source carries out the removal of nitrogen in denitrification process, and the aeration end time is according to dissolved oxygen meter（23）, pH analyzers（24）It is aobvious
DO, pH the change curve real-time control shown differentiate that nitrification terminal stops air compressor machine（28）Aeration precipitates 30min, drains 5min, into
Water ratio, draining are than being 10%, sludge age 20-30d；
The device of the synchronous nitration and denitrification processing early stage landfill leachate depth denitrification, including landfill leachate store water tank
（1）And sequencing batch reactor（2）, the landfill leachate storage water tank（1）Side be equipped with water inlet pipe（11）, the rubbish oozes
Filtrate stores water tank（1）The other side be equipped with overflow pipe（12）And evacuated tube（13）, the water inlet pipe（11）It is wriggled by intaking
Pump（21）Connect sequencing batch reactor（2）；The sequencing batch reactor（2）Interior setting blender（22）For being stirred in reactor
It mixes, dissolved oxygen meter is set（23）, pH analyzers（24）, oxidation reduction potential determination instrument（25）, it is respectively used to measure sequence batch
Formula reactor（2）The dissolved oxygen value of interior muddy water mixed solution, pH value, oxidation reduction potential value, the sequencing batch reactor（2）It is upper
Sample tap is arranged in portion（29）, drain valve（210）, the sequencing batch reactor（2）Bottom be equipped with aeration head（26）, the aeration
Head（26）With air compressor machine（28）Pass through gas flowmeter（27）Connection.
2. according to the method described in claim 1, it is characterized in that, differentiation nitrification terminal, stopping air compressor machine（28）Aeration
Method be：When the aeration reaction time is more than 0.5h, when the first derivative dpH/dt of pH in pH change curves is sported by negative
Positive number, and DO concentration is mutated by 0.5mg/L to 1.5mg/L or more.
3. according to the method described in claim 1, it is characterized in that, the anaerobism agitation phases：Oxidation reduction potential determination instrument
（25）Measure oxidation reduction potential value ＜ -150 mV, nitrate nitrogen, nitrite nitrogen 10 mg/L of concentration ＜.
4. according to the method described in claim 1, it is characterized in that, the carbon-nitrogen ratio COD/TN of the early stage landfill leachate is 8-
10。
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| CN110790378B (en) * | 2019-11-28 | 2022-04-19 | 恩格拜（武汉）生态科技有限公司 | Method for treating high-solid-content organic wastewater by anaerobic-aerobic deep coupling |
| CN116718742B (en) * | 2023-05-06 | 2024-05-24 | 四川文韬工程技术有限公司 | Water quality component analysis method for areas without sewage plants |
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| CN101767903A (en) * | 2009-10-30 | 2010-07-07 | 华南理工大学 | Method for simultaneously nitrifying and denitrifying garbage percolate in SBR reactor |
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| EP0509152A1 (en) * | 1991-04-17 | 1992-10-21 | Ecotechniek B.V. | Method and apparatus for processing manure |
| CN101767903A (en) * | 2009-10-30 | 2010-07-07 | 华南理工大学 | Method for simultaneously nitrifying and denitrifying garbage percolate in SBR reactor |
| CN103755028A (en) * | 2014-01-16 | 2014-04-30 | 北京工业大学 | Method for deep denitrification of metaphase landfill leachate through single-stage SBR (Styrene Butadiene Rubber) post denitrification treatment |
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