CN115403143A - Low-carbon treatment system and process for realizing deep denitrification of high-ammonia-nitrogen wastewater - Google Patents
Low-carbon treatment system and process for realizing deep denitrification of high-ammonia-nitrogen wastewater Download PDFInfo
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- CN115403143A CN115403143A CN202210947192.1A CN202210947192A CN115403143A CN 115403143 A CN115403143 A CN 115403143A CN 202210947192 A CN202210947192 A CN 202210947192A CN 115403143 A CN115403143 A CN 115403143A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 40
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 25
- 230000008569 process Effects 0.000 title claims description 24
- 239000010802 sludge Substances 0.000 claims abstract description 30
- 238000003756 stirring Methods 0.000 claims abstract description 30
- 238000005273 aeration Methods 0.000 claims abstract description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 22
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 230000001651 autotrophic effect Effects 0.000 claims abstract description 16
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 11
- 230000003647 oxidation Effects 0.000 claims abstract description 11
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
- 238000010992 reflux Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 230000005764 inhibitory process Effects 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000010813 municipal solid waste Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 8
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 7
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 6
- 241000894006 Bacteria Species 0.000 claims description 5
- 239000006228 supernatant Substances 0.000 claims description 5
- 241001453382 Nitrosomonadales Species 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009360 aquaculture Methods 0.000 claims description 3
- 244000144974 aquaculture Species 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 229910001385 heavy metal Inorganic materials 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 231100000331 toxic Toxicity 0.000 claims description 3
- 230000002588 toxic effect Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000001546 nitrifying effect Effects 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 5
- 239000003814 drug Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000010806 kitchen waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a low-carbon treatment system for realizing deep denitrification of high ammonia nitrogen wastewater, which comprises: the first anoxic filter tank is internally provided with a first stirring system; the first aerobic zone is connected with the first anoxic filter tank, and a first aeration system is arranged in the first aerobic zone; the second anoxic filter tank is connected with the first aerobic zone, and a second stirring system is arranged in the second anoxic filter tank; the second aerobic zone is connected with the second anoxic filter tank, and a second aeration system is arranged in the second aerobic zone; the third anoxic filter tank is connected with the second aerobic zone, and a third stirring system is arranged in the third anoxic filter tank; the third aerobic zone is connected with the third anoxic filter; the solid-liquid separation system is connected with the third aerobic zone and is connected with the first anoxic filter tank through a sludge backflow system. The invention alternately performs the functions of inner shortcut nitrification and anaerobic ammonia oxidation autotrophic denitrification, does not need to perform denitrification in a nitrifying liquid reflux mode, and saves the operation energy consumption of the system.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a low-carbon treatment system and a low-carbon treatment process for realizing deep denitrification of high-ammonia nitrogen wastewater.
Background
At present, anaerobic treatment and physical and chemical treatment are mainly used for domestic treatment of garbage leachate, kitchen garbage leachate, culture wastewater and the like, and the removal of total nitrogen in the high ammonia nitrogen wastewater is not paid enough attention. Some of the high-nitrogen pollutants in the wastewater are deeply treated by entering a municipal sewage plant, which undoubtedly increases the treatment burden of the sewage treatment plant and increases the operation cost of the sewage treatment plant; the other part directly enters the natural environment to cause adverse effect on the water environment;
the anaerobic ammonia oxidation autotrophic denitrification process gradually becomes a focus of attention of all countries in the world due to the advantages of deep denitrification, no need of an external carbon source in the denitrification process, low residual sludge yield, low N2O emission, low operation energy consumption and the like. High-ammonia nitrogen wastewater such as garbage leachate, kitchen waste leachate, aquaculture wastewater and the like can generate high-concentration FA in a sewage treatment system to form an inhibiting effect on NOB, can provide a stable nitrite substrate for anaerobic ammonia oxidation autotrophic denitrification, has inherent advantages for the operation of an anaerobic ammonia oxidation process, can solve the practical problems of high energy consumption and high cost of the high-ammonia nitrogen wastewater in the deep denitrification process to the greatest extent by applying the process, and provides organic technical support for the deep denitrification of the high-ammonia nitrogen wastewater; therefore, how to realize the anaerobic ammonia oxidation process more simply and stably through optimization and improvement on the technology and the process becomes a main direction of research.
Disclosure of Invention
The invention aims to provide a low-carbon treatment system and a low-carbon treatment process for realizing deep denitrification of high-ammonia-nitrogen wastewater, which solve the problems that the activity and the growth rate of the existing NOB are difficult to effectively inhibit and the short-cut nitrification is difficult to stably maintain, solve the problems of high energy consumption, high medicine consumption and high cost in the biochemical denitrification process of the high-ammonia-nitrogen wastewater, and reduce the yield of residual sludge.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a realize low carbon processing system of high ammonia nitrogen waste water degree of depth denitrogenation, includes:
the first anoxic filter tank is internally provided with a first stirring system;
the first aerobic zone is connected with the first anoxic filter tank, and a first aeration system is arranged in the first aerobic zone;
the second anoxic filter is connected with the first aerobic zone and is internally provided with a second stirring system;
the second aerobic zone is connected with the second anoxic filter tank, and a second aeration system is arranged in the second aerobic zone;
the third anoxic filter tank is connected with the second aerobic zone and is internally provided with a third stirring system;
the third aerobic zone is connected with the third anoxic filter tank, and a third aeration system is arranged in the third aerobic zone;
and the solid-liquid separation system is connected with the third aerobic zone and is connected with the first anoxic filter tank through a sludge return system.
A treatment process of a low-carbon treatment system for realizing deep denitrification of high ammonia nitrogen wastewater comprises the following steps:
and 5, allowing the mixed liquor treated by the autotrophic nitrogen removal system to enter a solid-liquid separation system, allowing supernatant after solid-liquid separation to enter a subsequent treatment unit or to reach the standard for discharge, allowing bottom concentrated sludge to flow back to the first anoxic filter tank through a sludge return system to maintain the stability of the sludge concentration in the system, and removing part of nitrate nitrogen and nitrite nitrogen carried in the returned sludge in the area through denitrification and anaerobic ammoxidation.
Preferably, the wastewater in the step 1 is wastewater containing high ammonia nitrogen.
Preferably, the activated sludge is uniformly mixed in the system through the stirring action of the first stirring system, the second stirring system and the third stirring system, so that the activated sludge is prevented from accumulating at the bottom of the anoxic filter tank.
Preferably, the dissolved oxygen in the short-cut nitrification system is controlled to be in a low dissolved oxygen state through the action of the first aeration system, the second aeration system and the third aeration system.
Preferably, DO is less than or equal to 1.0mg/L, and the stable short-cut nitrification is further maintained through the low dissolved oxygen effect.
The low-carbon treatment system and the process for realizing the deep denitrification of the high-ammonia-nitrogen wastewater have the beneficial effects that:
1. the method can deeply remove the nitrogen-containing pollutants in the high ammonia nitrogen wastewater without adding an external carbon source, greatly reduce the energy consumption and the medicine consumption in the denitrification process, and realize carbon emission reduction;
2. the invention alternatively performs the functions of internal shortcut nitrification and anaerobic ammonia oxidation autotrophic denitrification without performing denitrification in a nitrifying liquid reflux mode, thereby saving the operation energy consumption of the system.
Drawings
FIG. 1 is a schematic diagram of a low carbon processing system according to the present invention.
In the figure: 1. the system comprises a first anoxic filter tank, 2, a first aerobic zone, 3, a second anoxic filter tank, 4, a second aerobic zone, 5, a third anoxic filter tank, 6, a third aerobic zone, 7, a solid-liquid separation system, 8, a first stirring system, 9, a first aeration system, 10, a second stirring system, 11, a second aeration system, 12, a third stirring system, 13, a third aeration system, 14 and a sludge backflow system.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment, please refer to fig. 1, the present invention provides a technical solution: the utility model provides a realize low carbon processing system of high ammonia nitrogen waste water degree of depth denitrogenation, includes: the system comprises a first anoxic filter tank 1, a first aerobic zone 2, a second anoxic filter tank 3, a second aerobic zone 4, a third anoxic filter tank 5, a third aerobic zone 6, a solid-liquid separation system 7, a first stirring system 8, a first aeration system 9, a second stirring system 10, a second aeration system 11, a third stirring system 12, a third aeration system 13 and a sludge backflow system 14;
a first stirring system 8 is arranged in the first anoxic filter 1; the first aerobic zone 2 is connected with the first anoxic filter 1, and a first aeration system 9 is arranged in the first aerobic zone 2; the second anoxic filter 3 is connected with the first aerobic zone 2, and a second stirring system 10 is arranged in the second anoxic filter 3; the second aerobic zone 4 is connected with the second anoxic filter 3, and a second aeration system 11 is arranged in the second aerobic zone 4; the third anoxic filter 5 is connected with the second aerobic zone 4, and a third stirring system 12 is arranged in the third anoxic filter 5; the third aerobic zone 6 is connected with the third anoxic filter 5, and a third aeration system 13 is arranged in the third aerobic zone 6; the solid-liquid separation system 7 is connected with the third aerobic zone 6, and the solid-liquid separation system 7 is connected with the first anoxic filter tank 1 through a sludge reflux system 14.
A treatment process of a low-carbon treatment system for realizing deep denitrification of high ammonia nitrogen wastewater comprises the following steps:
the medium wastewater is wastewater containing high ammonia nitrogen;
and (3) carrying out mud-water separation by a solid-liquid separation system 7, introducing the supernatant into a subsequent treatment unit or directly discharging, introducing one part of deposited sludge into the first anoxic filter 1 through a sludge backflow system 14, and discharging the other part of the deposited sludge in the form of residual sludge for centralized treatment.
The stirring action of the first stirring system 8, the second stirring system 10 and the third stirring system 12 enables the activated sludge to be uniformly mixed in the system, so that the activated sludge is prevented from silting at the bottom of the anoxic filter tank;
the dissolved oxygen in the short-cut nitrification system is controlled to be in a low dissolved oxygen state through the action of the first aeration system 9, the second aeration system 11 and the third aeration system 13, DO is less than or equal to 1.0mg/L, and the stable short-cut nitrification is further maintained through the low dissolved oxygen action.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a realize low carbon processing system of high ammonia nitrogen waste water degree of depth denitrogenation which characterized in that includes:
the device comprises a first anoxic filter tank (1), wherein a first stirring system (8) is arranged in the first anoxic filter tank (1);
the first aerobic zone (2) is connected with the first anoxic filter tank (1), and a first aeration system (9) is arranged in the first aerobic zone (2);
the second anoxic filter tank (3) is connected with the first aerobic zone (2), and a second stirring system (10) is arranged in the second anoxic filter tank (3);
the second aerobic zone (4) is connected with the second anoxic filter tank (3), and a second aeration system (11) is arranged in the second aerobic zone (4);
the third anoxic filter tank (5) is connected with the second aerobic zone (4), and a third stirring system (12) is arranged in the third anoxic filter tank (5);
a third aerobic zone (6) connected with the third anoxic filter tank (5), wherein a third aeration system (13) is arranged in the third aerobic zone (6);
and the solid-liquid separation system (7) is connected with the third aerobic zone (6), and the solid-liquid separation system (7) is connected with the first anoxic filter tank (1) through a sludge return system (14).
2. The treatment process of the low-carbon treatment system for realizing the deep denitrification of the high-ammonia-nitrogen wastewater, which is characterized by comprising the following steps of:
step (1), pre-treating the garbage leachate, the kitchen garbage leachate and the aquaculture wastewater to remove suspended matters, partial organic matters and toxic and harmful heavy metal substances, and conveying the wastewater into a treatment system;
step (2), forming an NOB inhibition system by a first anoxic filter tank (1), a first aerobic zone (2), a second anoxic filter tank (3), a second aerobic zone (4), a third anoxic filter tank (5) and a third aerobic zone (6) through anoxic/aerobic alternation and combined inhibition of FA (FA) generated by high ammonia nitrogen wastewater, and gradually eliminating the NOB from the system through inhibition of NOB activity;
step (3) after NOB is inhibited by the NOB inhibition system, ammonia oxidizing bacteria are used as main dominant bacteria in the system nitrification process, a short-cut nitrification system is formed in the first aerobic zone (2) and the second aerobic zone (4), and the first aerobic zone (2) and the second aerobic zone (4) carry out short-cut nitrification to generate nitrite;
step (4), an autotrophic nitrogen removal system is formed in the anaerobic filter tank through the screening and enriching effects of anaerobic ammonia oxidation special fillers used by the first anoxic filter tank (1), the second anoxic filter tank (3) and the third anoxic filter tank (5), nitrite produced by the short-cut nitrification system and unreacted ammonia nitrogen are subjected to autotrophic nitrogen removal in the autotrophic nitrogen removal system, and nitrogen and a small amount of nitrate nitrogen are generated;
and (5) feeding the mixed liquor treated by the autotrophic nitrogen removal system into a solid-liquid separation system (7), feeding the supernatant after solid-liquid separation into a subsequent treatment unit or discharging the supernatant after reaching standards, refluxing the bottom concentrated sludge to the first anoxic filter (1) through a sludge reflux system (14) to maintain the stability of the sludge concentration in the system, and removing part of nitrate nitrogen and nitrite nitrogen carried in the refluxed sludge in the area through denitrification and anaerobic ammoxidation.
3. The treatment process of the low carbon treatment system for realizing the deep denitrification of the high ammonia nitrogen wastewater, according to the claim 2, is characterized in that the wastewater in the step (1) is the wastewater containing high ammonia nitrogen.
4. The treatment process of the low carbon treatment system for realizing the deep denitrification of the high ammonia nitrogen wastewater, according to the claim 2, is characterized in that the activated sludge is uniformly mixed in the system through the stirring action of the first stirring system (8), the second stirring system (10) and the third stirring system (12), so that the activated sludge is prevented from silting at the bottom of the anoxic filter tank.
5. The treatment process of the low carbon treatment system for realizing the deep denitrification of the high ammonia nitrogen wastewater, according to the claim 2, is characterized in that the dissolved oxygen in the short-cut nitrification system is controlled to be in a low dissolved oxygen state through the actions of the first aeration system (9), the second aeration system (11) and the third aeration system (13).
6. The treatment process of the low carbon treatment system for realizing the advanced nitrogen removal of the high ammonia nitrogen wastewater, according to claim 5, is characterized in that DO is less than or equal to 1.0mg/L, and the stable short-cut nitrification is further maintained through the low dissolved oxygen effect.
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Application publication date: 20221129 |