CN107879471B - Whole-process autotrophic nitrogen removal process and device - Google Patents
Whole-process autotrophic nitrogen removal process and device Download PDFInfo
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- CN107879471B CN107879471B CN201711098621.8A CN201711098621A CN107879471B CN 107879471 B CN107879471 B CN 107879471B CN 201711098621 A CN201711098621 A CN 201711098621A CN 107879471 B CN107879471 B CN 107879471B
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- 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
- C02F2101/00—Nature of the contaminant
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- C02F2101/16—Nitrogen compounds, e.g. ammonia
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Abstract
The invention discloses a novel completely autotrophic nitrogen removal process and a device, wherein wastewater is firstly subjected to a completely autotrophic nitrogen removal reactor to remove a large amount of ammonia nitrogen in the wastewater under aerobic conditions and then is subjected to reverse denitrificationThe parameters are as follows: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; the aeration rate is 10m3·(m3·h)‑1The above; then ammonia nitrogen and nitrite in the wastewater are removed by an anaerobic ammonia oxidation reactor, and the reaction parameters are as follows: temperature: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; and (4) anaerobic treatment. The sewage treatment process can reach the sewage discharge standard for treating high ammonia nitrogen wastewater such as sludge digestive juice, landfill leachate and the like, and has better economic, environmental and social benefits.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a completely autotrophic nitrogen removal process and a completely autotrophic nitrogen removal device.
Background
The conventional biological denitrification, namely nitrification and denitrification technology, refers to a process in which nitrogen-containing compounds in sewage are converted into nitrogen through a series of biochemical reactions, such as ammoniation reaction, nitrification reaction, denitrification reaction and the like, of microorganisms. At present, the traditional biological denitrification process applied in a sewage treatment plant has the defects of long denitrification process, large occupied area, higher operating cost and energy consumption and the like. When high ammonia nitrogen and low carbon nitrogen ratio wastewater represented by landfill leachate and sludge digestion liquid is treated, the traditional nitrification and denitrification process is difficult to meet the sewage discharge standard.
The completely autotrophic nitrogen removal process comprises two reactions of partial nitrification and anaerobic ammonia oxidation. The short-cut nitrification refers to stopping the nitrification reaction in the nitritation process by controlling the operation parameters, namely only ammonia oxidizing bacteria participate in the reaction to convert ammonia nitrogen into nitrite nitrogen without continuing the nitrification process. The anaerobic ammonia oxidation means that anaerobic ammonia oxidizing bacteria generate nitrogen and a small amount of nitrate nitrogen by using residual ammonia nitrogen as an electron donor and using nitrite nitrogen generated in the nitritation process of the ammonia oxidizing bacteria as an electron acceptor. The completely autotrophic nitrogen removal process has the characteristics of no need of organic carbon source, aeration saving, low sludge yield, small occupied area and simple operation when treating waste water with high ammonia nitrogen and low carbon nitrogen ratio represented by landfill leachate and sludge digestive juice, thereby being popular with scholars at home and abroad. However, the existing completely autotrophic nitrogen removal technology has the problems of over-high effluent nitrite nitrogen concentration, incapability of simultaneously increasing removal rate and removal load, low biomass of nitrifying bacteria and over-large reactor volume.
Disclosure of Invention
The inventor provides a completely autotrophic nitrogen removal process by virtue of experience and practice of related industries for many years, so as to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a completely autotrophic nitrogen removal process is characterized in that a large amount of ammonia nitrogen in wastewater is removed by the wastewater through a completely autotrophic nitrogen removal reactor under aerobic conditions, and the reaction parameters are as follows: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; the aeration rate is 10m3·(m3·h)-1The above; then removing ammonia nitrogen and nitrite nitrogen in the wastewater by an anaerobic ammonia oxidation reactor, wherein the reaction parameters are as follows: temperature: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; and (4) anaerobic treatment.
The top opening of the completely autotrophic denitrification reactor is open, the top opening of the anaerobic ammonia oxidation reactor is closed, the completely autotrophic denitrification reactor and the anaerobic ammonia oxidation reactor are of a columnar structure, a water inlet is formed in the lower portion of the completely autotrophic denitrification reactor, cobblestones are piled up, a water outlet is formed in the upper portion of the completely autotrophic denitrification reactor, and a device for preventing sludge loss is arranged at the top of the completely autotrophic denitrification reactor.
The lower part of the completely autotrophic nitrogen removal reactor is provided with an aeration head, and the device for preventing sludge loss is arranged at a position which is about 10cm below a water outlet. The device for preventing sludge loss consists of an interception cylinder with a closed top and a cylinder bottom sieve mesh bottom plate, and an interception filler unit is arranged in the interception filler unit. The water inlet is arranged at the center of the bottom of the columnar reactor, and an aeration head of the completely autotrophic denitrification reactor is arranged in parallel with the water inlet. The completely autotrophic nitrogen removal reactor adopts biological membrane sludge, the filler can adopt one of modified polyethylene and volcanic rock, and the anaerobic ammonia oxidation reactor adopts granular sludge. The volume ratio of the completely autotrophic nitrogen removal reactor to the anaerobic ammonia oxidation reactor is 5:1-10: 1.
The invention also provides a completely autotrophic nitrogen removal device, which comprises a completely autotrophic nitrogen removal reactor and an anaerobic ammonia oxidation reactor which are connected through a water conveying pipeline, wherein the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor are of columnar structures, the volume ratio is 5:1-10:1, the lower parts of the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor are provided with water inlets, cobblestones are accumulated, the upper parts of the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor are provided with water outlets, the top part of the completely autotrophic nitrogen removal reactor is provided with a device for preventing sludge loss, the top opening of the completely autotrophic nitrogen removal reactor is opened, and the top opening of the anaerobic ammonia oxidation reactor is; the device for preventing the sludge loss is arranged at a position which is about 10cm below the water outlet; the lower part of the completely autotrophic denitrification reactor is provided with an aeration head, the aeration head is connected with an air pump through an air conveying pipeline, a water inlet of the completely autotrophic denitrification reactor is connected with a water inlet tank through a water pump, and a water outlet of the anaerobic ammonia oxidation reactor is connected with a water storage tank through an output pipeline.
Preferably, the device for preventing sludge loss consists of an interception cylinder with a closed top and a cylinder bottom sieve pore bottom plate, and an interception filler unit is arranged in the device; the water inlet is arranged in the center of the bottom of the columnar reactor, and an aeration head of the completely autotrophic nitrogen removal reactor is arranged in parallel with the water inlet; the completely autotrophic nitrogen removal reactor adopts biological membrane sludge, the filler can adopt one of modified polyethylene and volcanic rock, and the anaerobic ammonia oxidation reactor adopts granular sludge.
The invention has the following beneficial effects:
(1) organically combines the completely autotrophic nitrogen removal technology and the anaerobic ammonia oxidation technology, has the advantages of completely autotrophic nitrogen removal and anaerobic ammonia oxidation, and mutually supplements the respective disadvantages;
(2) a large amount of ammonia nitrogen in the wastewater is removed under aerobic conditions by using completely autotrophic denitrification, and the basic removal of the ammonia nitrogen and nitrite nitrogen in the wastewater is realized under anaerobic conditions by using anaerobic ammonia oxidation reaction;
(3) the high ammonia nitrogen removal rate of the completely autotrophic nitrogen removal reactor is organically combined with the nitrite nitrogen removal rate of the anaerobic ammonia oxidation reactor, so that the problem of high concentration of nitrite nitrogen in the effluent of the completely autotrophic nitrogen removal reactor is solved;
(4) the system has higher removal rate and removal load, and solves the problem of lower biomass of nitrobacteria in the existing completely autotrophic nitrogen removal technology
(5) The volume ratio of the completely autotrophic nitrogen removal reactor to the anaerobic ammonia oxidation reactor is 5:1-10:1, and the occupied area is small;
(6) the sludge concentration in the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor is higher, and the flocculation performance of high-concentration sludge greatly improves the sludge sedimentation performance;
the sewage treatment process can reach the sewage discharge standard for treating high ammonia nitrogen wastewater such as sludge digestive juice, landfill leachate and the like, and has better economic, environmental and social benefits.
Drawings
FIG. 1 is a schematic structural diagram of a completely autotrophic nitrogen removal device according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described in detail below with reference to examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the invention provides a completely autotrophic nitrogen removal process, wherein wastewater is treated by a completely autotrophic nitrogen removal reactor to remove a large amount of ammonia nitrogen in the wastewater under aerobic conditions, and the reaction parameters are as follows: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; the aeration rate is 10m3·(m3·h)-1The above; then removing ammonia nitrogen and nitrite nitrogen in the wastewater by an anaerobic ammonia oxidation reactor, wherein the reaction parameters are as follows: temperature: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; and (4) anaerobic treatment. The top opening of the completely autotrophic denitrification reactor is open, the top opening of the anaerobic ammonia oxidation reactor is closed, the completely autotrophic denitrification reactor and the anaerobic ammonia oxidation reactor are of a columnar structure, a water inlet is formed in the lower portion of the completely autotrophic denitrification reactor, cobblestones are piled up, a water outlet is formed in the upper portion of the completely autotrophic denitrification reactor, and a device for preventing sludge loss is arranged at the top of the completely autotrophic denitrification reactor. The lower part of the completely autotrophic nitrogen removal reactor is provided with an aeration head, and the device for preventing sludge loss is arranged at a position which is about 10cm below a water outlet. The device for preventing sludge loss consists of an interception cylinder with a closed top and a cylinder bottom sieve mesh bottom plate, and an interception filler unit is arranged in the interception filler unit. The water inlet is arranged at the center of the bottom of the columnar reactor, and an aeration head of the completely autotrophic denitrification reactor is parallel to the water inletAnd (4) setting. The completely autotrophic nitrogen removal reactor adopts biological membrane sludge, the filler can adopt one of modified polyethylene and volcanic rock, and the anaerobic ammonia oxidation reactor adopts granular sludge. The volume ratio of the completely autotrophic nitrogen removal reactor to the anaerobic ammonia oxidation reactor is 5:1-10: 1.
As shown in fig. 1, the invention also provides a completely autotrophic nitrogen removal device, which comprises a completely autotrophic nitrogen removal reactor 1 and an anaerobic ammonia oxidation reactor 2 which are connected through a water conveying pipeline, wherein the completely autotrophic nitrogen removal reactor 1 and the anaerobic ammonia oxidation reactor 2 are both in a columnar structure, the volume ratio is 5:1-10:1, a water inlet 6 is arranged at the lower part of the completely autotrophic nitrogen removal reactor 1 and the anaerobic ammonia oxidation reactor 2, cobblestones 5 are accumulated, water 4 is arranged at the upper part of the completely autotrophic nitrogen removal reactor, a device 3 for preventing sludge loss is arranged at the top of the completely autotrophic nitrogen removal reactor, the top opening of the completely autotrophic nitrogen removal reactor is open, and the top opening of the anaerobic ammonia oxidation reactor is closed; the device for preventing the sludge loss is arranged at a position which is about 10cm below the water outlet; the lower part of the completely autotrophic denitrification reactor is provided with an aeration head 7, the aeration head 7 is connected with an air pump 9 through an air conveying pipeline, a water inlet of the completely autotrophic denitrification reactor is connected with a water inlet tank 10 through a water pump, and a water outlet of the anaerobic ammonia oxidation reactor is connected with a water storage tank 11 through an output pipeline. The device for preventing sludge loss consists of an interception cylinder with a closed top and a bottom screen mesh bottom plate, and an interception filler unit is arranged in the interception cylinder; the water inlet is arranged in the center of the bottom of the columnar reactor, and an aeration head of the completely autotrophic nitrogen removal reactor is arranged in parallel with the water inlet; the completely autotrophic nitrogen removal reactor adopts biological membrane sludge, the filler can adopt one of modified polyethylene and volcanic rock, and the anaerobic ammonia oxidation reactor adopts granular sludge.
The sewage treatment process of this embodiment is shown in the following table, wherein the influent water is inorganic water distribution and the influent water is NH4 +-N is 400 mg/L.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (7)
1. A completely autotrophic nitrogen removal process is characterized in that: the wastewater is firstly treated by a completely autotrophic nitrogen removal reactor under aerobic condition to remove a large amount of ammonia nitrogen in the wastewater, and the reaction parameters are as follows: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; the aeration rate is 10m3·(m3·h)-1The above; then removing ammonia nitrogen and nitrite nitrogen in the wastewater by an anaerobic ammonia oxidation reactor, wherein the reaction parameters are as follows: temperature: 30 plus or minus 0.1 ℃; the hydraulic retention time is 6 h; anaerobic treatment;
the top opening of the completely autotrophic denitrification reactor is open, the top opening of the anaerobic ammonia oxidation reactor is closed, the completely autotrophic denitrification reactor and the anaerobic ammonia oxidation reactor are both in a columnar structure, the lower part of the completely autotrophic denitrification reactor is provided with a water inlet and is piled with cobblestones, the upper part of the completely autotrophic denitrification reactor is provided with a water outlet, and the top of the completely autotrophic denitrification reactor is provided with a device for preventing sludge loss; the lower part of the completely autotrophic nitrogen removal reactor is provided with an aeration head, and the device for preventing sludge loss is arranged at a position 10cm below the water outlet.
2. The process of claim 1, wherein the process comprises: the device for preventing sludge loss consists of an interception cylinder with a closed top and a cylinder bottom sieve mesh bottom plate, and an interception filler unit is arranged in the interception filler unit.
3. The process of claim 1, wherein the process comprises: the water inlet is arranged at the center of the bottom of the columnar reactor, and an aeration head of the completely autotrophic denitrification reactor is arranged in parallel with the water inlet.
4. The process of claim 1, wherein the process comprises: the completely autotrophic nitrogen removal reactor adopts biological membrane sludge, the filler is modified polyethylene or volcanic rock, and the anaerobic ammonia oxidation reactor adopts granular sludge.
5. The process of claim 1, wherein the process comprises: the volume ratio of the completely autotrophic nitrogen removal reactor to the anaerobic ammonia oxidation reactor is 5:1-10: 1.
6. A completely autotrophic nitrogen removal device is characterized by comprising a completely autotrophic nitrogen removal reactor and an anaerobic ammonia oxidation reactor which are connected through a water conveying pipeline, wherein the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor are of columnar structures, the volume ratio is 5:1-10:1, a water inlet is formed in the lower parts of the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor, cobblestones are accumulated, a water outlet is formed in the upper parts of the completely autotrophic nitrogen removal reactor and the anaerobic ammonia oxidation reactor, a device for preventing sludge loss is arranged at the top of the completely autotrophic nitrogen removal reactor, the top opening of the completely autotrophic nitrogen removal reactor is open, and the top opening of the anaerobic ammonia oxidation reactor is closed; the device for preventing the sludge loss is arranged at a position which is 10cm below the water outlet; the lower part of the completely autotrophic denitrification reactor is provided with an aeration head, the aeration head is connected with an air pump through an air conveying pipeline, a water inlet of the completely autotrophic denitrification reactor is connected with a water inlet tank through a water pump, and a water outlet of the anaerobic ammonia oxidation reactor is connected with a water storage tank through an output pipeline.
7. The device of claim 6, wherein: the device for preventing sludge loss consists of an interception cylinder with a closed top and a bottom screen mesh bottom plate, and an interception filler unit is arranged in the interception cylinder; the water inlet is arranged in the center of the bottom of the columnar reactor, and an aeration head of the completely autotrophic nitrogen removal reactor is arranged in parallel with the water inlet; the completely autotrophic nitrogen removal reactor adopts biological membrane sludge, the filler adopts one of modified polyethylene and volcanic rock, and the anaerobic ammonia oxidation reactor adopts granular sludge.
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| CN103058461B (en) * | 2013-01-02 | 2013-11-06 | 北京工业大学 | Municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation |
| CN103172174B (en) * | 2013-03-09 | 2014-02-19 | 北京工业大学 | Starting and running method of completely autotrophic ammonium removal over nitrite technology |
| CN205500916U (en) * | 2015-12-16 | 2016-08-24 | 杭州师范大学 | Integration autotrophy type denitrification reactor |
| CN205740473U (en) * | 2016-06-29 | 2016-11-30 | 北京建筑大学 | A kind of autotrophic denitrification reaction unit preventing sludge loss |
| CN107265641A (en) * | 2017-03-16 | 2017-10-20 | 泉州华大环保科技有限公司 | A kind of high-enriched organics, the biological treatment device of ammonia nitrogen waste water and its application method |
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