CN104310580A - Device and method for realizing deep nitrogen removal of nitrate wastewater and municipal sewage by partial denitrification and serial autotrophic nitrogen removal - Google Patents
Device and method for realizing deep nitrogen removal of nitrate wastewater and municipal sewage by partial denitrification and serial autotrophic nitrogen removal Download PDFInfo
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- CN104310580A CN104310580A CN201410535671.8A CN201410535671A CN104310580A CN 104310580 A CN104310580 A CN 104310580A CN 201410535671 A CN201410535671 A CN 201410535671A CN 104310580 A CN104310580 A CN 104310580A
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/286—Anaerobic digestion processes including two or more steps
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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
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Abstract
The invention provides a device and method for realizing deep denitrification of nitrate wastewater and municipal sewage by partial denitrification and serial autotrophic nitrogen removal. The device comprises a nitrate wastewater tank, a municipal sewage tank, a partial denitrification reactor, an additional carbon resource reserve tank, a first intermediate water tank, an anaerobic ammonia oxidation reactor and a second intermediate water tank. The method comprises the following steps that nitrate wastewater and municipal sewage flow into the partial denitrification reactor according to a ratio, an effluent obtained after nitrate is reduced to nitrite flows into the anaerobic ammonia oxidation reactor to be subjected to an anaerobic ammonia oxidation reaction, and the effluent contains the nitrate generated by anaerobic ammonia oxidation, and then flows into the partial denitrification reactor to be subjected to partial denitrification to generate the nitrite; the effluent is pumped into the anaerobic ammonia nitrogen reactor again to be subjected to the anaerobic ammonia oxidation reaction with residual ammonia nitrogen in the reactor and is then removed. The device and method have the advantages of improving the system nitrogen removal efficiency and improving the effluent quality, the effluent meets the emission standard, and the deep nitrogen removal can be realized.
Description
Technical field
The present invention relates to the apparatus and method that a kind of part denitrification series connection autotrophic denitrification realizes nitrate wastewater and city sewage deep denitrogenation, belong to the technical field of biological sewage treatment, specifically nitrate wastewater and municipal effluent entering part denitrification reactor in proportion, be nitrite by nitrate reduction, water outlet enters anaerobic ammonia oxidation reactor and carries out Anammox reaction, containing the nitrate that Anammox produces in its water outlet, re-entering part denitrification reactor utilizes additional carbon to carry out part denitrification, water outlet is back to anaerobic ammonia oxidation reactor again and is reacted by Anammox remove with residue ammonia nitrogen, realize advanced nitrogen.
Background technology
Over nearly 20 years, China's Lake Eutrophication is on the rise, and not only affects drinking-water quality, also becomes the major incentive that various diseases occurs, creates have a strong impact on animals and plants and human health, water area ecological environment.In order to prevent the further deterioration of water body environment, China implements increasingly strict urban sewage discharge standard.Meanwhile, how realizing saves energy and reduce the cost in sewage treatment process has become problem of greatest concern.While meeting strict emission standard, reduce sewage disposal energy consumption, exploiting economy, efficiently novel process are the most effective current solutions.Bio-denitrifying sewage is current most widely used sewage disposal technology, and namely the ultimate principle of bio-denitrifying sewage to be by nitration reaction being first nitrate by ammonium oxidation, then by anti-nitration reaction, nitrate reduction is become gaseous nitrogen and overflow from water.Denitrification completes primarily of denitrifying bacterium, and they utilize the oxygen in nitrate to breathe, oxygenolysis organism, is N by nitrate-nitrogen reduction
2.When C/N of intaking is lower, outer carbon source need be added to ensure Nitrogen removal effect.And the C/N of the sanitary sewage of wastewater from chemical industry, breeding wastewater, percolate and urban is lower than, normally adds methyl alcohol or ethanol, has so both consumed limited organic resource, turn increase the working cost of Sewage Plant in Practical Project.
Nineteen ninety, anaerobic ammonia oxidation process is developed, namely under anaerobic, with NO in Dutch Delft technology university Kluyver Biotechnology Experiment room
2 --N is electron acceptor(EA), by NH
4 +-N is converted into N
2.Anaerobic ammonia oxidizing bacteria is autotrophic bacteria, does not therefore need to add organism, and without the need to the supply of oxygen, Anammox bacteria growing is slow, productive rate is low, and technique excess sludge production is few.This is found to be bio-denitrifying sewage and provides new theory and thinking.But this process application has some limitations: Anammox is matrix with nitrite, need first to realize short distance nitration.And short distance nitration under the condition of high temperature and high ammonia nitrogen comparatively volume realize, the municipal effluent that carbon-nitrogen ratio is lower then not easily to be realized and nitrite accumulation rate is difficult to remain stable, which also limits its range of application.On the other hand, anaerobic ammonium oxidation process can produce nitrate nitrogen, namely inherently contains part nitrate, the especially water outlet of high ammonia-nitrogen wastewater in its water outlet, and water outlet total nitrogen is up to standard to need supplementary aftertreatment to ensure; If short distance nitration process nitrite accumulation rate is lower, also can bring nitrate into anaerobic ammonia oxidation reactor, affect total nitrogen removal effect.And the process of intaking can be carried and is partly dissolved oxygen, cause the nitration reaction that can occur in anaerobic ammonia oxidation reactor to a certain degree to generate nitrate, finally cause containing excess nitrate in water outlet, could discharge after needing process further.
In denitrification process under optimum conditions, the accumulation of nitrite can be formed.Generally do not wish containing nitrite in water outlet, but, if the nitrite that can effectively utilize denitrification process to produce, another kind of approach can be provided for the application of anaerobic ammonia oxidation process.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, a kind of apparatus and method being realized nitrate wastewater and city sewage deep denitrogenation by part denitrification series connection autotrophic denitrification are proposed, specifically by nitrate wastewater and municipal effluent entering part denitrification reactor in proportion, heterotrophic denitrifying Bacteria utilizes the organism in municipal effluent to be nitrite by the nitrate reduction in water inlet, water outlet enters anaerobic ammonia oxidation reactor, and the ammonia nitrogen in the nitrite of generation and municipal effluent carries out Anammox and reacts and be removed; Containing the nitrate that Anammox produces in water outlet, this part water outlet enters into part denitrification reactor again and utilizes additional carbon to carry out part denitrification generation nitrite, water outlet is back to anaerobic ammonia oxidation reactor again and is reacted by Anammox remove with residue ammonia nitrogen, realizes advanced nitrogen.
The object of the invention is to be achieved through the following technical solutions:
Part denitrification series connection autotrophic denitrification realizes the device of nitrate wastewater and city sewage deep denitrogenation, it is characterized in that, comprise nitrate wastewater water tank 1, municipal effluent water tank 2, part denitrification reactor 3, additional carbon reserve tank 4, first intermediate water tank 5, anaerobic ammonia oxidation reactor 6, second intermediate water tank 7;
Nitrate wastewater water tank 1 is connected with part denitrification reactor 3 by the first peristaltic pump 3.1; This reactor is provided with the first whipping appts 3.3 and the first water outlet 3.4; Municipal effluent water tank 2 is connected with part denitrification reactor by the second peristaltic pump 3.2; Additional carbon reserve tank 4 is connected with part denitrification reactor by the 3rd peristaltic pump 4.1; Part denitrification reactor is connected with the first intermediate water tank 5; First intermediate water tank is connected with anaerobic ammonia oxidation reactor 6 by the 4th peristaltic pump 6.1; This reactor is provided with the second whipping appts 6.2, temperature-control device 6.3 and the second water outlet 6.4; Anaerobic ammonia oxidation reactor is connected with the second intermediate water tank 7; Second intermediate water tank is connected with part denitrification reactor 3 by the 5th peristaltic pump 3.5.
Part denitrification series connection autotrophic denitrification realizes the method for nitrate wastewater and city sewage deep denitrogenation, it is characterized in that, comprises following process:
(1) inoculate nitrite accumulation rate higher than 70% denitrification mud in part denitrification reactor, make sludge concentration in inoculation post-reactor be 2000 ~ 4000mg/L; Inoculation anaerobic ammonium oxidation sludge, in anaerobic ammonia oxidation reactor, makes sludge concentration in inoculation post-reactor be 1000 ~ 2500mg/;
(2) nitrate wastewater is collected in nitrate wastewater water tank, and its nitrate nitrogen concentration range is 20 ~ 80mg/L; The municipal effluent of municipal effluent water tank and nitrate wastewater by volume 1:1 ~ 1:3 pump into part denitrification reactor; Anoxia stirring 40 ~ 90min after water inlet, stir and terminate postprecipitation 30 ~ 60min, supernatant liquor enters the first intermediate water tank, and draining ratio is 30% ~ 70%;
In (3) first intermediate water tanks, waste water pumps into anaerobic ammonia oxidation reactor, anoxia stirring 3 ~ 8h after water inlet, and it is 28 ~ 35 DEG C that temperature controls; Stir and terminate postprecipitation 30 ~ 60min; Supernatant liquor enters the second intermediate water tank, and draining ratio is 30% ~ 70%;
In (4) second intermediate water tanks, waste water pumps into part denitrification reactor, and in additional carbon reserve tank, organic carbon source is added to part denitrification reactor by the 3rd peristaltic pump, makes COD in reactor be 2.5 ~ 3.5 with the ratio of the mass concentration of nitrate nitrogen; Anoxia stirring 40 ~ 90min after water inlet, stir and terminate postprecipitation 30 ~ 60min, supernatant liquor enters the first intermediate water tank, and draining ratio is 30% ~ 70%;
In (5) first intermediate water tanks, waste water pumps into anaerobic ammonia oxidation reactor, anoxia stirring 2 ~ 5h after water inlet, and it is 28 ~ 35 DEG C that temperature controls; Stir and terminate postprecipitation 30 ~ 60min; Discharge supernatant liquor, draining ratio is 30% ~ 70%.
Know-why:
The method that part denitrification series connection autotrophic denitrification realizes nitrate wastewater and city sewage deep denitrogenation refers to nitrate wastewater and municipal effluent 1:1 ~ 1:3 entering part denitrification reactor by volume, and object utilizes biodegradable organic in municipal effluent to be nitrite by nitrate reduction.The denitrification mud that a class has part Denitrification Characteristics is inoculated in part denitrification reactor, the incomplete denitrifying bacteria of a class is comprised in this mud, nitrate reduction can only be nitrite in lower initial carbon-nitrogen ratio with in the suitable reaction times by this kind of bacterium, and nitrite can not be reduced to nitrogen further.Therefore contain nitrite and ammonia nitrogen in the denitrifying water outlet of part, and after controlling water inlet, nitrate is that 1:1 ~ 1.5:1 is to meet the stoichiometric relationship of anaerobic ammonium oxidation process with the ratio of ammonia nitrogen concentration simultaneously.And anaerobic ammonium oxidation process can produce nitrate nitrogen, namely inherently contain part nitrate in its water outlet.On the other hand, water inlet process can be carried and is partly dissolved oxygen and enter anaerobic ammonia oxidation reactor, cause the aerobic nitrification bacterium existed in reactor can be nitrate by ammonia nitrogen or nitrite-oxidizing, finally cause containing excess nitrate in water outlet, could discharge after needing process further.Therefore by the effluent recycling of Anammox to part denitrification reactor, add a small amount of organism, by anaerobic ammonium oxidation process produce nitrate reduction be nitrite.Water outlet is back to anaerobic ammonia oxidation reactor again, and a upper cycle remaining ammonia nitrogen and nitrite utilize autotrophic denitrification to be removed, and reach the object of advanced nitrogen.
The apparatus and method that the part denitrification series connection autotrophic denitrification that the present invention relates to realizes nitrate wastewater and city sewage deep denitrogenation have the following advantages:
1) organic carbon source made full use of in municipal effluent carries out part denitrification, combines with Anammox autotrophic denitrification technique, saves additional carbon, reduces working cost;
2) inoculation has the denitrification mud of incomplete Denitrification Characteristics, and by part denitrification, the nitrate nitrogen in nitrate wastewater is reduced to nitrite nitrogen, nitrite accumulation can remain stable;
3) the anaerobic ammonia oxidation effluent re-entering part denitrification in a upper cycle and anaerobic ammonia oxidation reactor, further by excess nitrate reduction in water outlet, can reduce water outlet total nitrogen, improves nitric efficiency, reach the object of advanced nitrogen.
Accompanying drawing explanation
Fig. 1 is the schema that part denitrification series connection autotrophic denitrification realizes nitrate wastewater and city sewage deep denitrogenation method.
Embodiment
Below in conjunction with accompanying drawing and specific examples, the invention will be further described:
As shown in Figure 1, the device that part denitrification series connection autotrophic denitrification realizes nitrate wastewater and city sewage deep denitrogenation comprises nitrate wastewater water tank 1, municipal effluent water tank 2, part denitrification reactor 3, additional carbon reserve tank 4, first intermediate water tank 5, anaerobic ammonia oxidation reactor 6, second intermediate water tank 7;
Nitrate wastewater water tank 1 is connected with part denitrification reactor 3 by the first peristaltic pump 3.1; This reactor is provided with the first whipping appts 3.3 and the first water outlet 3.4; Municipal effluent water tank 2 is connected with part denitrification reactor by the second peristaltic pump 3.2; Additional carbon reserve tank 4 is connected with part denitrification reactor by the 3rd peristaltic pump 4.1; Part denitrification reactor is connected with the first intermediate water tank 5; First intermediate water tank is connected with anaerobic ammonia oxidation reactor 6 by the 4th peristaltic pump 6.1; This reactor is provided with the second whipping appts 6.2, temperature-control device 6.3 and the second water outlet 6.4; Anaerobic ammonia oxidation reactor is connected with the second intermediate water tank 7; Second intermediate water tank is connected with part denitrification reactor 3 by the 5th peristaltic pump 3.5.
Specifically comprise following process:
Inoculation has the denitrification mud of incomplete Denitrification Characteristics in part denitrification sbr reactor device, makes sludge concentration in inoculation post-reactor be 2800mg/L; This denitrification mud carrys out the denitrification reactor of self-operating more than 6 months, and water outlet nitrite accumulation rate reaches 80% ~ 100%; Inoculation anaerobic ammonium oxidation sludge, in Anammox sbr reactor device, makes sludge concentration in inoculation post-reactor be 2000mg/L.
Test municipal effluent used and adopt Families Home of Beijing University of Technology sanitary sewage, significant parameter is: COD is 200 ~ 300mg/L, and ammonia nitrogen concentration is 60 ~ 85mg/L, and total nitrogen concentration is 60 ~ 90mg/L, collects in municipal effluent water tank; Nitrate wastewater used is from laboratory aerobic nitrification reactor water outlet, and nitrate concentration is 30 ~ 45mg/L, collects in nitrate wastewater water tank.
Part denitrification sbr reactor device useful volume 3L, the total sewage quantity of each cycle process is 2.1L, nitrate wastewater 1:2 entering part denitrification reactor by volume in the municipal effluent of municipal effluent water tank and nitrate wastewater water tank, wherein each cycle enters nitrate wastewater 1.4L, municipal effluent is 0.7L, after water inlet, nitrate nitrogen is 1:1 with the ratio of ammonia nitrogen mass concentration, and in reactor, initial COD is 3.0 with the ratio of nitrate nitrogen mass concentration; Anoxia stirring 40min after water inlet, stir and terminate postprecipitation 30min, supernatant liquor enters the first intermediate water tank, volume of displacement 2.1L, and draining ratio is 70%.
Anammox sbr reactor device useful volume is 4L, each cycle water inlet 2.1L; In first intermediate water tank, waste water pumps into anaerobic ammonia oxidation reactor, anoxia stirring 6h after water inlet, and it is 30 DEG C that temperature controls; Stir and terminate postprecipitation 60min; Supernatant liquor enters the second intermediate water tank, volume of displacement 2.1L, and draining ratio is 52%.
In second intermediate water tank, waste water 2.1L is back to part denitrification sbr reactor device by peristaltic pump, in additional carbon reserve tank, organic carbon source adds to part denitrification reactor by peristaltic pump, employing sodium acetate solution is additional carbon, and controlling initial COD in reactor is 2.8 with the ratio of nitrate nitrogen mass concentration; Anoxia stirring 30min after water inlet, stir and terminate postprecipitation 30min, supernatant liquor enters the first intermediate water tank, volume of displacement 2.1L, and draining ratio is 70%.
In first intermediate water tank, waste water enters Anammox sbr reactor device by peristaltic pump again, anoxia stirring 2h after water inlet, and it is 30 DEG C that temperature controls; Stir and terminate postprecipitation 60min; Supernatant liquor is discharged as final outflow water, water outlet ammonia nitrogen concentration <2mg/L, nitrate concentration <5mg/L, total nitrogen concentration <10mg/L.
Long run test result shows:
With actual domestic wastewater and nitrate wastewater for water inlet, in part denitrification sbr reactor device, sludge concentration is 2800mg/L, the total sewage quantity of each cycle process is 2.1L, in the municipal effluent of municipal effluent water tank and nitrate wastewater water tank nitrate wastewater by volume 1:2 pump into part denitrification reactor, stir 40min, stir and terminate postprecipitation 30min, water outlet enters anaerobic ammonia oxidation reactor, its sludge concentration is 2000mg/L, effluent recycling is to part denitrification and anaerobic ammonia oxidation reactor, water outlet total nitrogen <10mg/L, reach country-level emission standard A, nitrate wastewater and municipal effluent advanced nitrogen simultaneously can be realized.
Claims (2)
1. part denitrification series connection autotrophic denitrification realizes the device of nitrate wastewater and city sewage deep denitrogenation, it is characterized in that, comprise nitrate wastewater water tank (1), municipal effluent water tank (2), part denitrification reactor (3), additional carbon reserve tank (4), the first intermediate water tank (5), anaerobic ammonia oxidation reactor (6), the second intermediate water tank (7);
Nitrate wastewater water tank (1) is connected with part denitrification reactor (3) by the first peristaltic pump (3.1); This reactor is provided with the first whipping appts (3.3) and the first water outlet (3.4); Municipal effluent water tank (2) is connected with part denitrification reactor by the second peristaltic pump (3.2); Additional carbon reserve tank (4) is connected with part denitrification reactor by the 3rd peristaltic pump (4.1); Part denitrification reactor is connected with the first intermediate water tank (5); First intermediate water tank is connected with anaerobic ammonia oxidation reactor (6) by the 4th peristaltic pump (6.1); This reactor is provided with the second whipping appts (6.2), temperature-control device (6.3) and the second water outlet (6.4); Anaerobic ammonia oxidation reactor is connected with the second intermediate water tank (7); Second intermediate water tank is connected with part denitrification reactor (3) by the 5th peristaltic pump (3.5).
2. device described in application rights requirement 1 carries out the method that part denitrification series connection autotrophic denitrification realizes nitrate wastewater and city sewage deep denitrogenation, it is characterized in that, comprises following process:
(1) inoculate nitrite accumulation rate higher than 70% denitrification mud in part denitrification reactor, make sludge concentration in inoculation post-reactor be 2000 ~ 4000mg/L; Inoculation anaerobic ammonium oxidation sludge, in anaerobic ammonia oxidation reactor, makes sludge concentration in inoculation post-reactor be 1000 ~ 2500mg/;
(2) nitrate wastewater is collected in nitrate wastewater water tank, and its nitrate nitrogen concentration range is 20 ~ 80mg/L; The municipal effluent of municipal effluent water tank and nitrate wastewater by volume 1:1 ~ 1:3 pump into part denitrification reactor; Anoxia stirring 40 ~ 90min after water inlet, stir and terminate postprecipitation 30 ~ 60min, supernatant liquor enters the first intermediate water tank, and draining ratio is 30% ~ 70%;
In (3) first intermediate water tanks, waste water pumps into anaerobic ammonia oxidation reactor, anoxia stirring 3 ~ 8h after water inlet, and it is 28 ~ 35 DEG C that temperature controls; Stir and terminate postprecipitation 30 ~ 60min; Supernatant liquor enters the second intermediate water tank, and draining ratio is 30% ~ 70%;
In (4) second intermediate water tanks, waste water pumps into part denitrification reactor, and in additional carbon reserve tank, organic carbon source is added to part denitrification reactor by the 3rd peristaltic pump, makes COD in reactor be 2.5 ~ 3.5 with the ratio of the mass concentration of nitrate nitrogen; Anoxia stirring 40 ~ 90min after water inlet, stir and terminate postprecipitation 30 ~ 60min, supernatant liquor enters the first intermediate water tank, and draining ratio is 30% ~ 70%;
In (5) first intermediate water tanks, waste water pumps into anaerobic ammonia oxidation reactor, anoxia stirring 2 ~ 5h after water inlet; Stir and terminate postprecipitation 30 ~ 60min; Discharge supernatant liquor, draining ratio is 30% ~ 70%.
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Cited By (9)
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| CN104692525A (en) * | 2015-02-15 | 2015-06-10 | 北京工业大学 | Continuous-flow integrated device and continuous-flow integrated method for simultaneous removal of nitrate nitrogen and ammonia nitrogen |
| CN106006956A (en) * | 2016-07-10 | 2016-10-12 | 北京工业大学 | Device and method for synchronously treating high-concentration NO3--N waste water, sludge digestion liquid and municipal sewage |
| CN108178294A (en) * | 2017-11-28 | 2018-06-19 | 郑州轻工业学院 | A kind of method of the low matrix anaerobic ammonia oxidation process of synchronous tandem promoter |
| CN108217935A (en) * | 2018-02-11 | 2018-06-29 | 北控水务(中国)投资有限公司 | A kind of apparatus and method of efficient process ion exchange regenerant waste liquid |
| CN109205790A (en) * | 2018-11-23 | 2019-01-15 | 北京工业大学 | A kind of device and method of municipal wastewater treatment plant secondary effluent advanced nitrogen |
| EP3481779A4 (en) * | 2016-07-08 | 2020-01-15 | Sudhir N. Murthy | Method and apparatus for nutrient removal with carbon addition |
| CN113666495A (en) * | 2021-08-26 | 2021-11-19 | 西北工业大学 | Efficient deep denitrification system and method |
| CN115340189A (en) * | 2022-09-13 | 2022-11-15 | 浙江慧科环保科技有限公司 | Method for accelerating anaerobic ammonia oxidation by using organic waste liquid |
| US11999641B2 (en) | 2021-03-12 | 2024-06-04 | Hampton Roads Sanitation District | Method and apparatus for multi-deselection in wastewater treatment |
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| CN104692525B (en) * | 2015-02-15 | 2017-01-18 | 北京工业大学 | Continuous-flow integrated device and continuous-flow integrated method for simultaneous removal of nitrate nitrogen and ammonia nitrogen |
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| EP3481779A4 (en) * | 2016-07-08 | 2020-01-15 | Sudhir N. Murthy | Method and apparatus for nutrient removal with carbon addition |
| CN106006956B (en) * | 2016-07-10 | 2019-03-22 | 北京工业大学 | A kind of synchronization process higher concentration NO3-The apparatus and method of-N waste water, sludge-digestion liquid and municipal sewage |
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| CN108217935A (en) * | 2018-02-11 | 2018-06-29 | 北控水务(中国)投资有限公司 | A kind of apparatus and method of efficient process ion exchange regenerant waste liquid |
| CN109205790A (en) * | 2018-11-23 | 2019-01-15 | 北京工业大学 | A kind of device and method of municipal wastewater treatment plant secondary effluent advanced nitrogen |
| CN109205790B (en) * | 2018-11-23 | 2021-07-30 | 北京工业大学 | Device and method for deep denitrification of secondary effluent of urban sewage plant |
| US11999641B2 (en) | 2021-03-12 | 2024-06-04 | Hampton Roads Sanitation District | Method and apparatus for multi-deselection in wastewater treatment |
| CN113666495A (en) * | 2021-08-26 | 2021-11-19 | 西北工业大学 | Efficient deep denitrification system and method |
| CN115340189A (en) * | 2022-09-13 | 2022-11-15 | 浙江慧科环保科技有限公司 | Method for accelerating anaerobic ammonia oxidation by using organic waste liquid |
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