CN220951396U - Device for controlling embedded particle short-cut nitrification and denitrification - Google Patents
Device for controlling embedded particle short-cut nitrification and denitrification Download PDFInfo
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- CN220951396U CN220951396U CN202322524041.8U CN202322524041U CN220951396U CN 220951396 U CN220951396 U CN 220951396U CN 202322524041 U CN202322524041 U CN 202322524041U CN 220951396 U CN220951396 U CN 220951396U
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- tank
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- denitrification
- embedded particles
- aerobic tank
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- 239000002245 particle Substances 0.000 title claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000005273 aeration Methods 0.000 claims abstract description 18
- 238000010992 reflux Methods 0.000 claims abstract description 14
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 13
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000009286 beneficial effect Effects 0.000 claims abstract description 6
- 244000005700 microbiome Species 0.000 claims description 20
- 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 13
- 239000002351 wastewater Substances 0.000 claims description 11
- 239000010802 sludge Substances 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000009935 nitrosation Effects 0.000 abstract description 2
- 238000007034 nitrosation reaction Methods 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 230000001546 nitrifying effect Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 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 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
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- 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
Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to a device for controlling short-cut nitrification and denitrification of embedded particles, which comprises: the device comprises a water inlet module, a constant temperature heating module, an alkali adding module, a free nitrous acid real-time monitoring module, an aeration fan, an aerobic tank, an anoxic tank, an MBR tank, a water outlet module and a mud discharging module; the water inlet module, the constant temperature heating module and the free nitrous acid real-time monitoring module are all connected with the aerobic tank; the alkali adding module is connected with the anoxic tank; the aeration fan is respectively connected with the bottoms of the aerobic tank and the MBR tank; and a water outlet module and a mud discharging module are also arranged in the MBR pool. The beneficial effects of the utility model are as follows: according to the utility model, the reflux of the aerobic tank is adopted, so that the FNA of the aerobic tank is controlled at a higher level, NOB activity in the embedded particles is inhibited, ammonia nitrogen oxidation stays in a nitrosation stage, the short-range nitrification and denitrification stability of the embedded particles can be realized, the total nitrogen removal rate of the system is more than 85%, and the energy consumption can be reduced by about 15%.
Description
Technical Field
The utility model relates to the technical field of water treatment, in particular to a device for controlling short-cut nitrification and denitrification of embedded particles.
Background
In the water treatment engineering, ammonia nitrogen is mainly converted into nitrate nitrogen and nitrite nitrogen through the nitrification of nitrifying microorganisms, and then is converted into nitrogen or nitrogen oxide through the denitrification of denitrifying microorganisms, wherein the nitrification is the first step for determining the key of biological denitrification. The traditional activated sludge method is taken as a mature denitrification process, has poor effect when treating low-concentration ammonia nitrogen wastewater, and reduces the overall denitrification efficiency of the system because the enrichment of nitrifying microorganisms is influenced by the low-concentration ammonia nitrogen. Thus, in response to this disadvantage, immobilized microorganism technology has been developed, with the use of entrapping immobilization technology being the most widely practiced. The immobilized microorganism embedding technology is a method for locating free microorganisms in the limited carrier space field by chemical or physical means, keeping the activity and recycling the free microorganisms. In the wastewater denitrification application process, the embedding technology can enrich denitrification dominant bacteria in high concentration, and prolong the residence time of microorganisms in a system; the embedded carrier can also relieve the influence of external factors on dominant bacteria and provide proper growth and reaction space for microorganisms.
Disclosure of utility model
The utility model aims at overcoming the defects of the prior art, and provides a device for controlling short-range nitrification and denitrification of embedded particles, which comprises the following components: the device comprises a water inlet module, a constant temperature heating module, an alkali adding module, a free nitrous acid real-time monitoring module, an aeration fan, an aerobic tank, an anoxic tank, an MBR tank, a water outlet module and a mud discharging module;
Wherein, the water inlet module, the constant temperature heating module and the free nitrous acid real-time monitoring module are all connected with the aerobic tank; the alkali adding module is connected with the anoxic tank; the aeration fan is respectively connected with the bottoms of the aerobic tank and the MBR tank; and a water outlet module and a mud discharging module are also arranged in the MBR pool.
Preferably, the water quality of the inlet water of the water inlet module comprises ammonia nitrogen concentration of 200-260 mg/L, C/N ratio of 1-10 and pH of 8-8.5.
Preferably, nitrifying embedding particles are added into the aerobic tank and used for oxidizing ammonia nitrogen in the wastewater into nitrite nitrogen, the addition amount is 10-30% of the volume of the aerobic tank, and an aeration disc is arranged at the bottom of the aerobic tank and used for providing oxygen for microorganisms.
Preferably, denitrification embedded particles are added into the anoxic tank and used for reducing nitrite nitrogen generated in the aerobic tank into nitrogen-containing gas, wherein the addition amount of the denitrification embedded particles is 10-30% of the volume of the anoxic tank; a stirrer 11 is also arranged in the anoxic tank and is used for uniformly mixing the denitrification embedded particles with the wastewater.
Preferably, a membrane component is arranged in the MBR tank and used for intercepting beneficial microorganisms in the system, and the sludge concentration in the MBR tank is controlled to be 3000-5000 mg/L and used for treating residual organic substances in the system; an aeration disc is arranged in the MBR pool and is used for providing oxygen for microorganisms.
Preferably, an anoxic tank reflux pipe is arranged to reflux the anoxic tank from the front end of the MBR tank, and an aerobic tank reflux pipe is arranged to reflux the anoxic tank from the front end of the anoxic tank.
Preferably, the reflux ratio of the anoxic tank is controlled to be 200-400%, and the reflux ratio of the aerobic tank is controlled to be 300-600%.
The beneficial effects of the utility model are as follows:
1. According to the utility model, the reflux of the aerobic tank is adopted, so that the FNA of the aerobic tank is controlled at a higher level, NOB activity in the embedded particles is inhibited, ammonia nitrogen oxidation stays in a nitrosation stage, the short-range nitrification and denitrification stability of the embedded particles can be realized, the total nitrogen removal rate of the system is more than 85%, and the energy consumption can be reduced by about 15%.
2. The embedded particles are combined with the activated sludge, and a front-mounted aerobic and rear-mounted anoxic system is adopted, so that the high free ammonia concentration in an aerobic tank is ensured, and NOB growth is inhibited; the denitrification and the rapid removal of organic matters can be carried out on the wastewater with low C/N ratio and high ammonia nitrogen; maintains the short-cut nitrification stability of the embedded particles, and the nitrite nitrogen in the effluent of the aerobic tank can be maintained to be more than 180 mg/L.
3. The utility model adopts a post MBR system, wherein the membrane component can intercept free microorganisms, and can prevent the low C/N ratio wastewater from affecting sludge loss; the beneficial microorganisms in the MBR tank are basically heterotrophic bacteria, so that the organic matters in the system can be effectively reduced; and the COD removal rate of the system is more than 90%.
Drawings
FIG. 1 is a schematic diagram of a device for controlling short-cut nitrification and denitrification of embedded particles;
Reference numerals illustrate: the device comprises a water inlet module 1, a constant temperature heating module 2, an alkali adding module 3, a free nitrous acid real-time monitoring module 4, an aeration fan 5, an aerobic tank 6, nitrifying embedded particles 7, denitrifying embedded particles 8, an aeration disc 9, an anoxic tank 10, a stirrer 11, an MBR tank 12, a membrane module 13, an anoxic tank return pipe 14, an aerobic tank return pipe 15, a water outlet module 16 and a sludge discharge module 17.
Detailed Description
The utility model is further described below with reference to examples. The following examples are presented only to aid in the understanding of the utility model. It should be noted that it will be apparent to those skilled in the art that modifications can be made to the present utility model without departing from the principles of the utility model, and such modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.
Example 1:
The embodiment of the application provides a device for controlling short-cut nitrification and denitrification of embedded particles, which is shown in figure 1 and comprises the following steps: the device comprises a water inlet module 1, a constant temperature heating module 2, an alkali adding module 3, a free nitrous acid real-time monitoring module 4, an aeration fan 5, an aerobic tank 6, an anoxic tank 10, an MBR tank 12, a water outlet module 16 and a mud discharging module 17;
Wherein, the water inlet module 1, the constant temperature heating module 2 and the free nitrous acid real-time monitoring module 4 are all connected with the aerobic tank 6; the alkali adding module 3 is connected with the anoxic tank 10; the aeration fan 5 is respectively connected with the bottoms of the aerobic tank 6 and the MBR tank 12; a water outlet module 16 and a sludge discharge module 17 are also arranged in the MBR tank 12.
The water quality of the water inlet module 1 comprises ammonia nitrogen concentration of 200-260 mg/L, C/N ratio of 1-10 and pH of 8-8.5.
The nitrifying and embedding particles 7 are added into the aerobic tank 6 and used for oxidizing ammonia nitrogen in the wastewater into nitrite nitrogen, the adding amount is 10-30% of the volume of the aerobic tank 6, and an aeration disc 9 is arranged at the bottom of the aerobic tank 6 and used for providing oxygen for microorganisms.
The denitrification embedded particles 8 are added into the anoxic tank 10 and used for reducing nitrite nitrogen generated in the aerobic tank into nitrogen-containing gas, and the adding amount is 10-30% of the volume of the anoxic tank; a stirrer 11 is also arranged in the anoxic tank and is used for uniformly mixing the denitrification embedded particles 8 with the wastewater.
A membrane component 13 is arranged in the MBR tank 12 and used for intercepting beneficial microorganisms in the system, and the sludge concentration in the MBR tank 12 is controlled to be 3000-5000 mg/L and is used for treating residual organic substances in the system; an aeration disc 9 is arranged in the MBR tank 12 and is used for providing oxygen for microorganisms.
Example 2:
On the basis of the embodiment 1, the embodiment of the application provides another device for controlling short-cut nitrification and denitrification of embedded particles, as shown in fig. 1, which comprises: the device comprises a water inlet module 1, a constant temperature heating module 2, an alkali adding module 3, a free nitrous acid real-time monitoring module 4, an aeration fan 5, an aerobic tank 6, an anoxic tank 10, an MBR tank 12, a water outlet module 16 and a mud discharging module 17.
In addition, an anoxic tank return pipe 14 is arranged to return to the anoxic tank 10 from the front end of the MBR tank 12, and an aerobic tank return pipe 15 is arranged to return to the aerobic tank 6 from the front end of the anoxic tank 10.
Wherein, the reflux ratio of the anoxic tank 10 is controlled to be 200-400 percent, and the reflux ratio of the aerobic tank 6 is controlled to be 300-600 percent.
Specifically, the method provided in this embodiment is a construction process corresponding to the roadbed provided in embodiment 1, so that the same or similar parts as those in embodiment 1 in this embodiment may be referred to each other, and will not be described in detail in this disclosure.
Example 3:
On the basis of the embodiments 1 and 2, the embodiment of the application provides a working method of a device for controlling short-range nitrification and denitrification of embedded particles, which comprises the following steps:
Step 1, water is fed into an aerobic tank 6 through a water feeding module 1;
Step 2, controlling the system temperature to be kept stable at 30-35 ℃ through a constant temperature heating module 2, and controlling the pH value of the anoxic tank to be 7.5-8 through an alkali adding module 3;
Step 3, monitoring the concentration of free nitrous acid in the aerobic tank 6 in real time through a free nitrous acid real-time monitoring module 4;
Step 4, providing dissolved oxygen for the aerobic tank 6 and the MBR tank 12 through the aeration fan 5, wherein the concentration of the dissolved oxygen is controlled to be 2-4 mg/L;
Step 5, oxidizing ammonia nitrogen in the wastewater into nitrite nitrogen through an aerobic tank 6 added with nitrifying embedding particles 7;
Step 6, reducing nitrite nitrogen generated in the aerobic tank 6 into nitrogen-containing gas through an anoxic tank 10 added with denitrification embedded particles 8;
And 7, treating residual organic matters in the system through the MBR tank 12, discharging water after the system treatment is finished through the water discharging module 16, and discharging residual sludge through the sludge discharging module 17.
In the step 7, nitrite nitrogen which is not completely denitrified in the MBR tank is returned to the anoxic tank 10 through the anoxic tank return pipe 14 for further removal; and (3) refluxing part of nitrite nitrogen into the aerobic tank 6 through an aerobic tank reflux pipe 15, and controlling the concentration of 6FNA in the aerobic tank to reach a normal level.
Specifically, the method provided in this embodiment is a method corresponding to the apparatus provided in embodiments 1 and 2, and therefore, the parts in this embodiment that are the same as or similar to those in embodiments 1 and 2 may be referred to each other, and will not be described in detail in this disclosure.
Claims (7)
1. The device for controlling the short-cut nitrification and denitrification of the embedded particles is characterized by comprising: the device comprises a water inlet module (1), a constant temperature heating module (2), an alkali adding module (3), a free nitrous acid real-time monitoring module (4), an aeration fan (5), an aerobic tank (6), an anoxic tank (10), an MBR tank (12), a water outlet module (16) and a mud discharging module (17);
Wherein, the water inlet module (1), the constant temperature heating module (2) and the free nitrous acid real-time monitoring module (4) are all connected with the aerobic tank (6); the alkali adding module (3) is connected with the anoxic tank (10); the aeration fan (5) is respectively connected with the bottoms of the aerobic tank (6) and the MBR tank (12); the MBR tank (12) is also internally provided with a water outlet module (16) and a mud discharging module (17).
2. The device for controlling the shortcut nitrification and denitrification of embedded particles according to claim 1, wherein the water quality of the inflow water module (1) comprises ammonia nitrogen concentration of 200-260 mg/L, a C/N ratio of 1-10 and a ph of 8-8.5.
3. The device for controlling the shortcut nitrification and denitrification of the embedded particles according to claim 2, wherein the nitrification embedded particles (7) are added into the aerobic tank (6) for oxidizing ammonia nitrogen in the wastewater into nitrite nitrogen, the addition amount is 10-30% of the volume of the aerobic tank (6), and an aeration disc (9) is arranged at the bottom of the aerobic tank (6) for providing oxygen for microorganisms.
4. The device for controlling the short-cut nitrification and denitrification of embedded particles according to claim 3, wherein denitrification embedded particles (8) are added into the anoxic tank (10) and used for reducing nitrite nitrogen generated in the aerobic tank into nitrogen-containing gas, and the addition amount of the nitrite nitrogen is 10-30% of the volume of the anoxic tank; a stirrer (11) is also arranged in the anoxic tank and is used for uniformly mixing the denitrification embedded particles (8) with the wastewater.
5. The device for controlling the shortcut nitrification and denitrification of embedded particles according to claim 4, wherein a membrane module (13) is arranged in the MBR tank (12) and is used for intercepting beneficial microorganisms in a system, and the sludge concentration in the MBR tank (12) is controlled to be 3000-5000 mg/L and is used for treating residual organic matters in the system; an aeration disc (9) is arranged in the MBR tank (12) and is used for providing oxygen for microorganisms.
6. The apparatus for controlling short-cut nitrification and denitrification of embedded particles as claimed in claim 5, wherein an anoxic tank return pipe (14) is provided to return from the front end of the MBR tank (12) to the anoxic tank (10), and an aerobic tank return pipe (15) is provided to return from the front end of the anoxic tank (10) to the aerobic tank (6).
7. The device for controlling short-cut nitrification and denitrification of embedded particles as claimed in claim 5, wherein the reflux ratio of the anoxic tank (10) is controlled to be 200-400%, and the reflux ratio of the aerobic tank (6) is controlled to be 300-600%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322524041.8U CN220951396U (en) | 2023-09-18 | 2023-09-18 | Device for controlling embedded particle short-cut nitrification and denitrification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322524041.8U CN220951396U (en) | 2023-09-18 | 2023-09-18 | Device for controlling embedded particle short-cut nitrification and denitrification |
Publications (1)
| Publication Number | Publication Date |
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| CN220951396U true CN220951396U (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322524041.8U Active CN220951396U (en) | 2023-09-18 | 2023-09-18 | Device for controlling embedded particle short-cut nitrification and denitrification |
Country Status (1)
| Country | Link |
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| CN (1) | CN220951396U (en) |
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2023
- 2023-09-18 CN CN202322524041.8U patent/CN220951396U/en active Active
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