CN101439903A - Method for realizing semi-hitrosation under normal temperature municipal sewage condition - Google Patents
Method for realizing semi-hitrosation under normal temperature municipal sewage condition Download PDFInfo
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- CN101439903A CN101439903A CNA2008102405134A CN200810240513A CN101439903A CN 101439903 A CN101439903 A CN 101439903A CN A2008102405134 A CNA2008102405134 A CN A2008102405134A CN 200810240513 A CN200810240513 A CN 200810240513A CN 101439903 A CN101439903 A CN 101439903A
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- municipal sewage
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- hitrosation
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Abstract
The invention relates to a method for realizing semi-nitrosation under a condition of room-temperature municipal sewage, and belongs to the field of municipal sewage treatment and reuse. The invention aims at solving the problems of high-energy and high-material consumption during the prior biological denitrification for municipal sewage and providing proper water input for applying anaerobic ammoxidation process to the denitrogenation treatment for municipal sewage. The method is successfully applied for the first time to the biological treatment of the semi-nitrosation of municipal sewage through control of low dissolved oxygen and auxiliary addition of part of ammonia salts under the condition of room-temperature municipal sewage, thereby ensuring the application of the high-efficiency low-consumption anaerobic ammoxidation process to the biological denitrification of municipal sewage. The method has the advantages of short reactor starting cycle, simple operation, stable system running, good sewage treatment effects, low cost, and the like.
Description
Technical field
The invention belongs to municipal sewage treatment and resource utilization field.Be specifically related to be exclusively used in the method for the high-level efficiency less energy-consumption biological denitrificaion of municipal effluent under the normal temperature condition.
Background technology
Traditional nitrated/denitrification biological denitrogenation technology had once played important effect in the denitrogenation of waste water field.But its nitrated stage energy consumption is huge: if do not consider the propagation of nitrifier in the nitrifying process, then oxidation 1g ammonia nitrogen (NH
4 +-N) be nitrate nitrogen (NO
3 --N) will consume 4.57gO
2, 7.14g basicity is (with CaCO
3Meter); Denitrification stage carbon source demand amount height, reduction 1gNO
3 --N needs the biodegradable COD of 2.86g as hydrogen donor.Because the C/N value of city domestic sewage is lower, it is the carbon source deficiency that biological denitrificaion is handled the greatest problem that is faced, and must additionally add carbon source for reaching denitrification effect, and this has just increased the energy consumption and the cost of sewage disposal greatly.
Anammox (anaerobic ammonium oxidation is called for short Anammox) is meant that under anaerobic the Anammox bacterium is with NH
4 +-N is an electron donor, with nitrite nitrogen (NO
2 --N) be electron acceptor(EA), directly ratio is about the NH of 1:1
4 +-N and NO
2 --N changes into N simultaneously
2And discharge into the atmosphere, thereby realize the purpose that nitrogen removes in the waste water.Because the Anammox approach is at nitrosification (Nitrosification, claim short distance nitration again) the biological autotrophic denitrification that carries out on the basis, so it is compared with traditional nitrated/denitrification denitrogenation technology, have oxygen-consumption few, do not need carbon source, sludge yield is low and numerous advantages such as non-secondary pollution.At present, about the research and the application of Anammox technology, mainly be at high NH of high temperature such as percolate and sludge digestion phegmas
4 +The waste water of-N, and for the down low NH of normal temperature condition
4 +The still rarely seen report of the research of-N municipal effluent Anammox.Therefore, Anammox can be regarded as present municipal effluent biological denitrificaion handle in the biological denitrification process of Sustainable development of tool potentiality.
Semi-hitrosation technology based on Anammox technology is to realize the key point of normal temperature municipal sewage Anammox biological denitrificaion.Under normal temperature municipal sewage condition, how with about 50% NH in the waste water
4 +-N is oxidized to NO
2 --N, and avoid to NO
3 --N transforms, and is the most important thing that realizes the municipal effluent high-efficiency low-consumption biological denitrification.
Summary of the invention
The objective of the invention is to solve the existing high problem of municipal effluent biological denitrificaion energy consumption material consumption,, and provide the method that realizes semi-hitrosation under a kind of normal temperature municipal sewage condition based on efficient Anammox biological denitrification process.
The method of a kind of municipal effluent semi-hitrosation provided by the present invention, be under normal temperature condition, secondary effluent (phosphorus and organism have obtained removing) with municipal effluent aerobic/anaerobic biological phosphate-eliminating is basic water, adopt conventional Sewage treatment systems, main by the control low dissolved axygen with to add NH
4 +-N is as supplementary means, and by adjusting hydraulic detention time (HRT), realizes the semi-hitrosation of municipal effluent.
A kind of normal temperature municipal sewage condition provided by the present invention is realized the method for semi-hitrosation down, it is characterized in that:
Dissolved oxygen is controlled at 0.1-0.5mg/L, in water inlet, adds NH with the form of ammonium salt
4 +-N makes NH
4 +-N concentration reaches the scope of 160-250mg/L, by adjusting hydraulic detention time with NH in the water outlet
4 +-N and NO
2 -The mol ratio of-N maintains 1:1-1:1.3.
Compare with the nitrosification bioremediation of existing waste water, the present invention has following beneficial effect:
1) the inventive method adopts the major control low dissolved axygen, and to add the part ammonia nitrogen as auxiliary approach, be successfully applied to the biological treatment of normal temperature municipal sewage semi-hitrosation first, for the application of efficient Anammox technology in the municipal effluent biological denitrificaion is handled provides assurance.
2) the reactor start-up cycle of the inventive method short because mainly by low dissolved axygen and hydraulic detention time control, this just makes the simple to operate of reactor, realizes the steady running of normal temperature municipal sewage semi-hitrosation more economically.
3) construction cost of the inventive method compares tradition, and nitrated/denitrification denitrogenation system is economized more than 20%; on the economic operating cost 30%; the reuse water cost reduces on 20%; this just greatly reduces the cost of municipal effluent manipulation of regeneration; accelerate the process of sewage recycling, provide technical support for alleviating and solving the water crisis.
Embodiment
Below in conjunction with embodiment the present invention is further described, but protection scope of the present invention is not limited thereto.
Concrete steps are as follows:
1) reactor is built
Reactor can be waste disposal plants such as biological filter, SBR, Continuous Flow activated sludge process reaction tank.Reactor all is equipped with aerating apparatus, can come dissolved oxygen concentration in the controlling reactor waste water by regulating aeration rate.
2) aerobic nitrification sludge acclimatization
Initial start stage inserts the mud with common nitrification function to reactor, and by the control aeration rate, the concentration that makes inside reactor handle oxygen in water remains between the 2-4mg/L scope.Under this operational conditions, when the nitrated rate of reactor water outlet reaches 50%, think that the aerobic nitrification sludge acclimatization is successful, this stage needs 7-10 days.
3) Nitrate bacteria suppresses
In step 2) on the basis, in the reactor water inlet, add NH
4 +-N makes NH
4 +-N concentration reaches the scope of 160-250mg/L, and dissolved oxygen is controlled between the scope of 0.1-0.5mg/L.Under this operational conditions, NO in the reactor water outlet
2 -The concentration of-N surpasses NH in the raw waste water
4 +1/2 o'clock of-N concentration thinks that Nitrate bacteria suppresses successfully, and this stage needs 10-20 days.
4) semi-hitrosation is realized
On the step 3) basis, stop in the reactor water inlet, adding NH
4 +-N, and dissolved oxygen is controlled between the scope of 0.1-0.5mg/L.Under this operational conditions, by adjusting HRT, NH in the reactor water outlet
4 +-N and NO
2 -When the concentration ratio of-N maintains 1:1-1:1.3, think that semi-hitrosation realizes that this stage needs 20-30 days.
In the above-mentioned reactor discharging water outlet, NH
4 +-N and NO
2 -The ratio of-N is about 1:1-1:1.3, TN＜10mg/L, and water quality satisfies the requirement of Anammox reaction.
Test is basic water with certain community life sewage through aerobic/anaerobic biological phosphate-eliminating secondary treatment yielding water, and concrete water quality is as follows: COD=50～80mg/L, BOD
5≤ 15mg/L, SS≤30mg/L, NH
4 +-N=55～85mg/L, NO
2 --N≤0.25mg/L, NO
3 --N≤1.5mg/L, TP≤1mg/L, PH=7.0～8.5.
Effluent quality after the semi-hitrosation reactor for treatment is as follows: COD＜50mg/L;
BOD
5<10mg/L；SS<10mg/L；NH
4 +-N＝20-40mg/L，NO
2 --N＝20-40mg/LNH
4 +-N/NO
2 --N≈1:1；TN≤15mg/L；TP≤0.5mg/L；PH＝7.0～8.5。
Concrete processing is as follows:
Embodiment 1
Adopt biological filter column type reactor.Biological filter column type reactor diameter 20cm, high 3m, it is the pebbles of 1-2cm that the lowest layer is laid the high particle diameter of 20cm, as supporting layer, the volcanics that adds the 150cm particle diameter again and be 6-8mm is as the main reaction region filler, and aerating apparatus is installed in the bottom, and strict controlling reactor is handled the concentration of oxygen in water.The unloading phase insert common sludge with nitrification function, the dissolved oxygen concentration in the control treating water is between the 2-4mg/L scope, under this operational conditions, after 10 days, the nitrated rate of reactor water outlet reaches 50%, thinks the success of aerobic nitrification mud biofilm.On this basis, in the reactor water inlet, add NH
4 +-N makes NH
4 +-N concentration reaches the scope of 200-250mg/L, and dissolved oxygen is controlled between the scope of 0.2-0.4mg/L, moves 20 days with this understanding, NO in the reactor water outlet
2 -The concentration of-N surpasses NH in the raw waste water
4 +1/2 o'clock of-N concentration thinks that Nitrate bacteria suppresses successfully.On this basis, stop in the reactor water inlet, adding NH
4 +-N, and dissolved oxygen is controlled between the scope of 0.2-0.4mg/L.Under this operational conditions, by adjustment HRT, after 30 days, NH in the reactor water outlet
4 +-N and NO
2 -The concentration ratio of-N maintains 1:1-1:1.3, TN＜10mg/L, and water quality satisfies the requirement of Anammox reaction, and semi-hitrosation is successfully realized in biology filter post.
Embodiment 2
Adopt the sbr reactor device.The useful volume of sbr reactor device is 5L, and the bottom is installed aerating apparatus and handled the concentration of oxygen in water with control, and establishes agitator, to strengthen the matrix transmission.The unloading phase insert common sludge with nitrification function, the dissolved oxygen concentration in the control treating water is between the 2-3mg/L scope, under this operational conditions, after 7 days, the nitrated rate of reactor water outlet reaches 50%, thinks aerobic nitrification sludge acclimatization success.On this basis, in the reactor water inlet, add NH
4 +-N makes NH
4 +-N concentration reaches the scope of 160-230mg/L, and dissolved oxygen is controlled between the scope of 0.1-0.4mg/L, moves 10 days with this understanding, NO in the reactor water outlet
2 -The concentration of-N surpasses NH in the raw waste water
4 +1/2 o'clock of-N concentration thinks that Nitrate bacteria suppresses successfully.On this basis, stop in the reactor water inlet, adding NH
4 +-N, and dissolved oxygen is controlled between the scope of 0.1-0.4mg/L.Under this operational conditions, by adjustment HRT, after 20 days, NH in the reactor water outlet
4 +-N and NO
2 -The concentration ratio of-N maintains 1:1-1:1.3, TN＜10mg/L, and water quality satisfies the requirement of Anammox reaction, and semi-hitrosation is successfully realized in SBR.
Embodiment 3
Adopt Continuous Flow activated sludge process reaction tank.The main reaction region of Continuous Flow activated sludge process reaction unit is provided with aerating apparatus and whipping device, is respectively applied for control dissolved oxygen and matrix transmission, and settling region part mud is back to main reaction region by peristaltic pump.The unloading phase insert common sludge with nitrification function, the dissolved oxygen concentration in the control treating water is between the 2-4mg/L scope, under this operational conditions, after 8 days, the nitrated rate of reactor water outlet reaches 50%, thinks aerobic nitrification sludge acclimatization success.On this basis, in the reactor water inlet, add NH
4 +-N makes NH
4 +-N concentration reaches the scope of 190-240mg/L, and dissolved oxygen is controlled between the scope of 0.1-0.5mg/L, moves 15 days with this understanding, when the concentration of NO2--N in the reactor water outlet surpasses NH in the raw waste water
4 +1/2 o'clock of-N concentration thinks that Nitrate bacteria suppresses successfully.On this basis, stop in the reactor water inlet, adding NH
4 +-N, and dissolved oxygen is controlled between the scope of 0.1-0.5mg/L.Under this operational conditions, by adjustment HRT, after 25 days, NH in the reactor water outlet
4 +-N and NO
2 -The concentration ratio of-N maintains 1:1-1:1.3, TN＜10mg/L, and water quality satisfies the requirement of Anammox reaction, and semi-hitrosation is successfully realized in the Continuous Flow Activated Sludge Process.
Claims (1)
1. a normal temperature municipal sewage condition is realized the method for semi-hitrosation down, it is characterized in that:
Dissolved oxygen is controlled at 0.1-0.5mg/L, in water inlet, adds NH with the form of ammonium salt
4 +-N makes NH
4 +-N concentration reaches the scope of 160-250mg/L, by adjusting hydraulic detention time with NH in the water outlet
4 +-N and NO
2 -The mol ratio of-N maintains 1:1-1:1.3.
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| CNA2008102405134A CN101439903A (en) | 2008-12-19 | 2008-12-19 | Method for realizing semi-hitrosation under normal temperature municipal sewage condition |
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|---|---|---|---|
| CNA2008102405134A CN101439903A (en) | 2008-12-19 | 2008-12-19 | Method for realizing semi-hitrosation under normal temperature municipal sewage condition |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663680A (en) * | 2013-11-25 | 2014-03-26 | 北京工业大学 | Method for cultivating aerobic half-nitrosation granular sludge in continuous flow manner |
| CN103693807A (en) * | 2013-12-13 | 2014-04-02 | 重庆大学 | Combination method for treating pickled vegetable processing wastewater based on anaerobic ammonia oxidation |
| CN103739071A (en) * | 2014-01-10 | 2014-04-23 | 博天环境集团股份有限公司 | Slightly-polluted surface water denitrification method |
| CN103880170A (en) * | 2014-03-23 | 2014-06-25 | 北京工业大学 | Starting method of nitrosated granule sludge for treating urban sewage |
| CN103896394A (en) * | 2014-03-29 | 2014-07-02 | 北京工业大学 | Starting method of CANON granule sludge of regeneration urban sewage |
-
2008
- 2008-12-19 CN CNA2008102405134A patent/CN101439903A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663680A (en) * | 2013-11-25 | 2014-03-26 | 北京工业大学 | Method for cultivating aerobic half-nitrosation granular sludge in continuous flow manner |
| CN103663680B (en) * | 2013-11-25 | 2015-01-07 | 北京工业大学 | Method for cultivating aerobic half-nitrosation granular sludge in continuous flow manner |
| CN103693807A (en) * | 2013-12-13 | 2014-04-02 | 重庆大学 | Combination method for treating pickled vegetable processing wastewater based on anaerobic ammonia oxidation |
| CN103693807B (en) * | 2013-12-13 | 2015-05-13 | 重庆大学 | Combination method for treating pickled vegetable processing wastewater based on anaerobic ammonia oxidation |
| CN103739071A (en) * | 2014-01-10 | 2014-04-23 | 博天环境集团股份有限公司 | Slightly-polluted surface water denitrification method |
| CN103880170A (en) * | 2014-03-23 | 2014-06-25 | 北京工业大学 | Starting method of nitrosated granule sludge for treating urban sewage |
| CN103880170B (en) * | 2014-03-23 | 2015-06-17 | 北京工业大学 | Starting method of nitrosated granule sludge for treating urban sewage |
| CN103896394A (en) * | 2014-03-29 | 2014-07-02 | 北京工业大学 | Starting method of CANON granule sludge of regeneration urban sewage |
| CN103896394B (en) * | 2014-03-29 | 2015-05-20 | 北京工业大学 | Starting method of CANON granule sludge of regeneration urban sewage |
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Open date: 20090527 |