CN105129991B - A kind of method of nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process - Google Patents

A kind of method of nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process Download PDF

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CN105129991B
CN105129991B CN201510601635.1A CN201510601635A CN105129991B CN 105129991 B CN105129991 B CN 105129991B CN 201510601635 A CN201510601635 A CN 201510601635A CN 105129991 B CN105129991 B CN 105129991B
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nitrification
denitrification
sludge
part denitrification
sewage
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CN105129991A (en
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王淑莹
牛萌
彭永臻
杜睿
操沈彬
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Beijing taikezhikang Environmental Protection Technology Co., Ltd
Beijing University of Technology
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Beijing University of Technology
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Abstract

The method that the present invention proposes a kind of nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process, belongs to sewage treatment area, and described device includes raw water box and nitrification/part denitrification/anaerobic ammonia oxidation reactor.The method comprising the steps of:City domestic sewage enters nitrification/part denitrification/anaerobic ammonia oxidation reactor several times, after entering a certain amount of municipal sewage every time, anoxia stirring is for a period of time, carry out incomplete denitrification and Anammox reaction, and then aeration carries out aerobic nitrification reaction, then a certain amount of low C/N is pumped into again than municipal sewage, anoxia stirring, aerobic nitrification.The efficient removal of total nitrogen in sanitary sewage is realized finally.

Description

A kind of nitrification/part denitrification/low C/N the cities of Anammox coupling technique process The method of sewage
Technical field
The present invention relates to a kind of side of nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process Method, belongs to technical field of biological sewage treatment, and specifically city domestic sewage enters nitrification/part denitrification/anaerobism several times Ammonia oxidation reactor, after pumping into sewage every time, first anoxia stirring for a period of time, carries out incomplete denitrification and Anammox is anti- Should, and then aeration carries out aerobic nitrification reaction, finally realizes the efficient removal of total nitrogen in sanitary sewage.The present invention makes full use of Carbon source in sanitary sewage, sludge yield are low, and process is simple is easy to control, are a kind of low energy consumption, the low C/N cities of efficient, stable process City's sewage new way.
Background technology
In recent years, China's water body eutrophication degree is on the rise, and gives people healthy, water area ecological environment, tourism Go sightseeing and aquaculture causes serious harm.In order to prevent further the deteriorating and in view of the regeneration of water resource of water body environment Recycle, the sewage nitrogen (N) of many countries and regions, phosphorus (P) discharge standard are increasingly strict.Traditional denitrogenation method is usually Realized by nitrification, denitrification process, when low C/N sanitary sewages are processed, this process needs aeration rate height, additionally adds Carbon source and basicity, and its sewage water denitrification efficiency can not meet strict discharge standard.Research and development dephosphorization efficiently, economic Denitrification process has become the focus of current city sewage disposal technology research.
Anammox (Anammox) is that the mid-90 in 20th century is new by one kind that Dutch Delft technology universities develop Type bio-denitrification technology, refers to that microorganism is directly with NO under anaerobism or anoxia condition2 -- N is electron acceptor, with ammonia nitrogen (NH4 +- N it is) electron donor, two kinds of nitrogens is converted into into the bioprocesses of nitrogen simultaneously.With traditional nitration denitrification technique phase Than, it does not need additional organic carbon source, sludge yield it is few, completely without oxygen, save substantial amounts of operating cost, it is not necessary to Acid-base neutralization agent, it is to avoid secondary pollution, is current economic, efficient bio-denitrification technology, receives significant attention.
One of substrate needed for Anammox is nitrite, and nitrite is generally not present in natural water, because This needs to take pre-treatment measure.Method universal at present is that short-cut nitrification technology is arranged before anaerobic ammonia oxidation process, by dirt Ammonia nitrogen in water is nitrite by aerating oxidation, and the ratio for adjusting ammonia nitrogen and nitrite in water inlet is 1:1.32, then lead to Crossing Anammox carries out autotrophic denitrification.Short-cut nitrification technology is mainly by the suppression of control dissolved oxygen, temperature, pH or free ammonia Effect is realized, but the greatest problem that short distance nitration faces is to obtain enough and stable nitrite accumulations.And for low-carbon (LC) The city domestic sewage of nitrogen ratio, under room temperature, short distance nitration is difficult to remain stable, causes follow-up Anammox nitric efficiency not high, Control process is complex, and this is also to limit the bottleneck that short distance nitration-anaerobic ammoxidation technology is applied to municipal sewage.
Obtain nitrite another kind of method be by denitrification by nitrate reduction be the anti-nitre in nitrite, i.e. part Change.Complete heterotrophic denitrification act as nitrate and is reduced to nitrite by organic carbon source, restores as nitric oxide, oxygen Change sub- nitrogen, be finally reduced to nitrogen.It is inoculated with the suitable carbon-nitrogen ratio of suitable seed sludge and control and the response time can be realized Higher nitrite accumulation in denitrification process, so as to provide electron acceptor for Anammox.For the reality of Anammox Border application provides stable, effective method.
The content of the invention
The invention aims to solve above-mentioned technical problem, it is proposed that a kind of nitrification/part denitrification/anaerobism ammonia oxygen Change the method that coupling technique processes low C/N municipal sewages, specifically city domestic sewage enters the anti-nitre in nitrification/part several times Change/anaerobic ammonia oxidation reactor, every time into after a certain amount of municipal sewage, first anoxia stirring for a period of time, is carried out not exclusively Denitrification and Anammox reaction, and then aeration carries out aerobic nitrification reaction, then pumps into a certain amount of low C/N ratios again Municipal sewage, anoxia stirring, aerobic nitrification.The efficient removal of total nitrogen in sanitary sewage is realized finally.
A kind of method of nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process, its feature It is using following device:
Including raw water box (1), nitrification/part denitrification/anaerobic ammonia oxidation reactor (3);Raw water box (1) is by peristaltic pump (2) it is connected with nitrification/part denitrification/anaerobic ammonia oxidation reactor (3);The reactor be provided with agitator (4), aeration head (5), Drain valve (7), ORP on-line determination instrument (8), pH on-line determination instrument (9), DO on-line determination instrument (10);Air pump (6) and aeration head (5) connect;Peristaltic pump (2), air pump (6), agitator (4), ORP on-line determination instrument (8), pH on-line determination instrument (9), DO are online Analyzer (10) and computer (12) are connected with self-con-tained unit (11).
Characterized in that, methods described step is as follows:
1) municipal sewage plant excess sludge, part denitrification sludge and anaerobic ammonium oxidation sludge are inoculated with anti-in nitrification/part In nitrification/anaerobic ammonia oxidation reactor, three kinds of seed sludge mass concentration MLVSS ratios are 1:1:2~1:1:4, control inoculation In post-reactor, sludge quality concentration is 2000mg/L~4000mg/L.
2) 1/5~1/3 sanitary sewage of each cycle inflow is pumped in nitrification/part denitrification/Anammox reaction In device, while turn on agitator, 10~40min of anoxia stirring.
3) after anoxia stirring terminates, opening air pump carries out aerobic nitrification, after aeration 20min~60min, closes air Pump;
2)~3) 3~5 time 4) repeat step, closes agitator, and quiet heavy 30~60min opens drain valve, and draining ratio is 40%~60%;
5) after idle 60~120min, from step 2) start the cycle over, run into next cycle.
Described step 1) in part denitrification sludge nitrate nitrogen can be converted into into nitrite in denitrification process Nitrogen, conversion percentages are stably maintained at 80%~90%;
Described step 2) in municipal sewage be low C/N than sewage, NH4 +- N=50~80mg/L, COD=100~ 280mg/L;
Described step 3) during aerobic nitrification, in control reactor, dissolved oxygen concentration is in 1.5~3mg/L;
A kind of method of described nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process, During stable operation, in system, sludge age SRT is 30~60 days.
Know-why
A kind of method of the low C/N municipal sewages of nitrification/part denitrification/Anammox coupling technique process is by each cycle The raw water of process is entered in main reactor, after pumping into raw water every time several times, anoxia stirring certain hour, using the part of inoculation Organic substance in denitrification sludge and raw water, is nitrite by the nitrate reduction in reactor, while detesting using inoculation Anaerobic ammonium oxidation sludge, it is synchronous by the part ammonia nitrogen removal in raw water, aerobic aeration is subsequently carried out, by the ammonium oxidation not removed is Nitrate, then pumps into a certain amount of raw water again, and repeat the above steps finally realize the efficient denitrification of low C/N municipal sewages.Adopt Purpose with water intake mode several times is to make full use of the limited carbon source in city domestic sewage to carry out part denitrification to produce nitrous Hydrochlorate, so as to without the need for additional carbon, reduce operating cost.
A kind of nitrification according to the present invention/part denitrification/low C/N municipal sewages of Anammox coupling technique process Method has advantages below:
1) using water intake mode several times, in making full use of city domestic sewage, nitrate reduction is nitrous by limited carbon source Hydrochlorate, so as to or need not reduce outer carbon source, reduces operating cost;
2) aerobic nitrification product is nitrate, compares short distance nitration, without the need for complicated external condition control and monitor in real time, Operation simple and stable;
3) part denitrification nitrite accumulation rate is high, easily-controlled reaction conditions, and can run steadily in the long term;
4) the nitrate nitrogen in-situ reducing that Anammox can be produced by part denitrifying bacterium, improves reactor denitrogenation effect Rate, effluent quality are high.
5) nitrifier of autotrophy, anaerobic ammonia oxidizing bacteria and part denitrification process sludge yield it is low, system sludge age is long, can Anaerobic ammonia oxidizing bacteria is stayed effectively to hold, the yield of sludge is reduced, so as to reduce the disposal costs of sludge, is further reduced actual The operating cost of water factory.
Description of the drawings
Fig. 1 is that nitrification/part denitrification/low C/N municipal sewages apparatus structure of Anammox coupling technique process is illustrated Figure.
Fig. 2 is nitrification/part denitrification/low C/N municipal sewages plant running step of Anammox coupling technique process Schematic diagram.
Specific embodiment
The invention will be further described with instantiation below in conjunction with the accompanying drawings:
As shown in figure 1, a kind of side of nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process Method, it is characterised in that using following device:Including raw water box (1), nitrification/part denitrification/anaerobic ammonia oxidation reactor (3); Raw water box (1) is connected with nitrification/part denitrification/anaerobic ammonia oxidation reactor (3) by peristaltic pump (2);The reactor is provided with Agitator (4), aeration head (5), drain valve (7), ORP on-line determination instrument (8), pH on-line determination instrument (9), DO on-line determination instrument (10);Air pump (6) is connected with aeration head (5);Peristaltic pump (2), air pump (6), agitator (4), ORP on-line determination instrument (8), PH on-line determination instrument (9), DO on-line determination instrument (10) and computer (12) are connected with self-con-tained unit (11).
Methods described step is as follows:
1) municipal sewage plant excess sludge, part denitrification sludge and anaerobic ammonium oxidation sludge are inoculated with anti-in nitrification/part In nitrification/anaerobic ammonia oxidation reactor, three kinds of seed sludge mass concentration MLVSS ratios are 1:1:2~1:1:4, control inoculation In post-reactor, sludge quality concentration is 2000mg/L~4000mg/L.
2) 1/5~1/3 sanitary sewage of each cycle inflow is pumped in nitrification/part denitrification/Anammox reaction In device, after water inlet end, turn on agitator, 10~40min of anoxia stirring.
3) after anoxia stirring terminates, opening air pump carries out aerobic nitrification, after aeration 20min~60min, closes air Pump;
2)~3) 3~5 time 4) repeat step, closes agitator, and quiet heavy 30~60min opens drain valve, and draining ratio is 40%~60%;
5) after idle 60~120min, from step 2) start the cycle over, run into next cycle.
Described step 1) in part denitrification sludge nitrate nitrogen can be converted into into nitrite in denitrification process Nitrogen, conversion percentages are stably maintained at 80%~90%;
Described step 2) in municipal sewage be low C/N than sewage, NH4 +- N=50~80mg/L, COD=100~ 280mg/L;
Described step 3) during aerobic nitrification, in control reactor, dissolved oxygen concentration is in 2mg/L;
A kind of method of described nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique process, During stable operation, in system, sludge age SRT is 30~60 days.
Specifically include procedure below:
Using Families Home of Beijing University of Technology sanitary sewage, major parameter is raw water used by experiment:COD=200~ 300mg/L, NH4 +- N=60~85mg/L, TN=60~90mg/L;The ratio of its COD and the mass concentration of ammonia nitrogen is 2.2~3.5 Between, belong to typical low C/N and compare municipal sewage;Raw water collection is in raw water box.
Inoculation municipal sewage plant excess sludge, part denitrification sludge and anaerobic ammonium oxidation sludge are in the anti-nitre in nitrification/part In change/anaerobic ammonia oxidation reactor, three kinds of seed sludge mass concentration MLVSS ratios are 1:1:3, sludge in inoculation post-reactor Concentration is 3150mg/L;Wherein, the part denitrification sludge of inoculation comes the self-operating denitrification reactor of more than 1 year, the sludge With incomplete Denitrification Characteristics, in the case of organic carbon source concentration is relatively low, can only be nitrite by nitrate reduction, which is sub- Nitrate Accumulation rate reaches 80%.
Nitrification/part denitrification/anaerobic ammonia oxidation reactor adopt sbr reactor device, reactor dischargeable capacity 12L, often Period treatment total Water is 6L.In raw water box low ratio of carbon to ammonium city domestic sewage by peristaltic pump enter nitrification/part denitrification/ Anaerobic ammonia oxidation reactor, enters water volume 1.5L, anoxia stirring 30min after water inlet, and now in reactor, ammonia nitrogen mean concentration is 13.14mg/L, nitrite average nitrogen concentration are 0.11mg/L, and nitrate nitrogen mean concentration is 0.23mg/L.Then aeration 30min, aeration process control dissolved oxygen ammonia nitrogen in 2mg/L, reactor and are oxidized.
Intake in reactor again by peristaltic pump, enter water volume 3L, anoxia stirring 3h after water inlet, now in reactor Ammonia nitrogen mean concentration is 13.98mg/L, and nitrite average nitrogen concentration is 0.13mg/L, and nitrate nitrogen mean concentration is 0.15mg/L.Then aeration 40min, aeration process control dissolved oxygen ammonia nitrogen in 2mg/L, reactor and are oxidized.
Intake in reactor 1.5L finally by peristaltic pump, anoxia stirring 3h after water inlet, now in reactor, ammonia nitrogen is put down Concentration is 1.05mg/L, and nitrite average nitrogen concentration is 0.12mg/L, and nitrate nitrogen mean concentration is 0.31mg/L.Then Aeration 10min, in reactor, ammonia nitrogen is oxidized.Stop stirring, after quiet heavy 30min, discharge supernatant, draining compares 50%.
Continuous experiment result shows:
Nitrification/part denitrification/anaerobic ammonia oxidation reactor sludge concentration is controlled in 3150mg/L, is intake in three times, the Once intake 1.5L, anoxia stirring 30min, aeration 30min;Second water inlet 3L, anoxia stirring 3h, aeration 40min;For the third time Water inlet 1.5L, anoxia stirring 3h, aeration 10min;Quiet heavy 30min, draining compare 50%;Water outlet ammonia nitrogen<1mg/L, total nitrogen<5mg/L, Nitrogen removal rate reaches 90%~95%, can realize low ratio of carbon to ammonium city domestic sewage stability and high efficiency denitrogenation.

Claims (1)

1. the method that a kind of nitrification/part denitrification/Anammox coupling technique processes low C/N municipal sewages, application are as follows Device:
The device includes raw water box (1), nitrification/part denitrification/anaerobic ammonia oxidation reactor (3);Raw water box (1) is by wriggling Pump (2) is connected with nitrification/part denitrification/anaerobic ammonia oxidation reactor (3);The reactor is provided with agitator (4), aeration head (5), drain valve (7), ORP on-line determination instrument (8), pH on-line determination instrument (9), DO on-line determination instrument (10);Air pump (6) and exposure Gas head (5) connects;Peristaltic pump (2), air pump (6), agitator (4), ORP on-line determination instrument (8), pH on-line determination instrument (9), DO On-line determination instrument (10) and computer (12) are connected with self-con-tained unit (11);
Characterized in that, methods described step is as follows:
1) be inoculated with municipal sewage plant excess sludge, part denitrification sludge and anaerobic ammonium oxidation sludge in nitrification/part denitrification/ In anaerobic ammonia oxidation reactor, three kinds of seed sludge mass concentration MLVSS ratios are 1:1:2~1:1:4, react after control inoculation In device, sludge quality concentration is 2000mg/L~4000mg/L;
2) pump into 1/5~1/3 municipal sewage of each cycle inflow in nitrification/part denitrification/anaerobic ammonia oxidation reactor, While turn on agitator, 10~40min of anoxia stirring;
3) after anoxia stirring terminates, opening air pump carries out aerobic nitrification, after aeration 20min~60min, closes air pump;
2)~3) 3~5 time 4) repeat step, closes agitator, quiet heavy 30~60min, opens drain valve, and draining ratio is 40%~ 60%;
5) after idle 60~120min, from step 2) start the cycle over, run into next cycle;
Described step 1) in part denitrification sludge nitrate nitrogen can be converted into into nitrite nitrogen in denitrification process, turn Change percentage ratio and be stably maintained at 80%~90%;
Described step 2) in municipal sewage be low C/N than sewage, wherein NH4 +- N=50~80mg/L, COD=100~ 280mg/L;
Described step 3) during aerobic nitrification, in control reactor, dissolved oxygen concentration is in 1.5~3mg/L;
In running, sludge age SRT is 30~60 days.
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CN105540832B (en) * 2015-12-14 2018-06-22 安徽国祯环保节能科技股份有限公司 The device and method of low carbon-nitrogen ratio sewage autotrophic denitrification is realized based on part denitrification-Anammox
CN106865773B (en) * 2017-04-07 2020-02-11 北京工业大学 Device and method for realizing partial shortcut nitrification-anaerobic ammonia oxidation by adding hydroxylamine
CN107867756A (en) * 2017-11-02 2018-04-03 中国科学院大学 The experimental rig and control method of SBR Prepositive denitrifications/Anammox

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