CN114105296B - Device and method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation - Google Patents
Device and method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation Download PDFInfo
- Publication number
- CN114105296B CN114105296B CN202111338840.5A CN202111338840A CN114105296B CN 114105296 B CN114105296 B CN 114105296B CN 202111338840 A CN202111338840 A CN 202111338840A CN 114105296 B CN114105296 B CN 114105296B
- Authority
- CN
- China
- Prior art keywords
- denitrification
- low
- oxygen
- anaerobic
- reactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/004—Apparatus and plants for the biological treatment of water, waste water or sewage comprising a selector reactor for promoting floc-forming or other bacteria
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/15—N03-N
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- 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
Abstract
The invention provides a device and a method for deep denitrification based on low-oxygen complete nitrification-coupling internal carbon source short-range denitrification anaerobic ammonia oxidation. The device comprises an urban sewage raw water tank, an anaerobic reactor and a low-oxygen denitrification reactor. Firstly, municipal sewage is pumped into an anaerobic reactor, organic matters in the sewage are converted into an internal carbon source and stored in activated sludge, then effluent enters a low-oxygen denitrification reactor where anaerobic ammonia oxidizing bacteria and complete nitrifying bacteria are symbiotic in a sludge-water mixture mode, the concentration of dissolved oxygen is controlled by a controller, the coexistence of the anaerobic ammonia oxidizing bacteria and the complete nitrifying bacteria is realized under the low-oxygen condition, the complete nitrification-short-cut denitrification-anaerobic ammonia oxidation autotrophic denitrification process is realized by utilizing the internal carbon source, and energy conservation, consumption reduction and deep denitrification are realized.
Description
Technical Field
The invention relates to the field of sewage biological treatment, in particular to a device and a method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation.
Background
Since 2015 complete nitrifying bacteria were discovered by two research teams and published in paper form on Nature, the presence of complete nitrifying bacteria has updated an understanding of nitrification for over a hundred years. At the end of the 19 th century russian scientist separated two bacteria that could complete nitrification step by step, AOB and NOB, respectively. Although complete nitrifying bacteria have been demonstrated in recent years to have a certain competitive advantage over AOB and NOB in terms of both microbial kinetics and thermodynamics, the low bacterial growth rate due to their longer reaction paths may be a reason that has not been observed for this many years. Since the advent of complete nitrifying bacteria, the characteristics of low energy consumption and low substrate concentration have attracted attention of many scientists, but a specific method for coupling deep denitrification with other microorganisms is not available for the reason that the physiological and biochemical characteristics are not clear.
Disclosure of Invention
In view of the above, the invention provides a device and a method for deep denitrification by coupling short-cut denitrification and anaerobic ammoxidation based on a low-oxygen complete nitrification with an internal carbon source. The internal carbon source is used for supplying short-range denitrification to convert nitrate nitrogen into nitrite nitrogen, and then the nitrite nitrogen and ammonia nitrogen are converted into nitrogen through anaerobic ammoxidation reaction. Compared with the traditional nitrification and denitrification, the short-cut denitrification anaerobic ammonia oxidation has low organic carbon source demand and low oxygen consumption, and simultaneously, 100 percent denitrification can be realized theoretically due to the simultaneous occurrence of complete nitrification and short-cut denitrification anaerobic ammonia oxidation, thus providing possibility for deep denitrification.
The technical scheme of the invention is realized as follows: a device for deep denitrification by coupling internal carbon source short-cut denitrification anaerobic ammonia oxidation based on low-oxygen complete nitrification comprises an urban sewage raw water tank, an anaerobic reactor and a low-oxygen denitrification reactor; the urban sewage raw water tank comprises a tank body, a first overflow pipe, a blow-down pipe and a water inlet pump, wherein the first overflow pipe and the blow-down pipe are arranged on the tank body; the anaerobic reactor comprises an anaerobic reaction container, a water inlet valve, a first stirrer and a second overflow pipe, wherein the second overflow pipe is arranged on the anaerobic reaction container, and stirring blades of the first stirrer are positioned inside the anaerobic reactor; the low-oxygen denitrification reactor comprises a low-oxygen denitrification reaction container, a second stirrer, an aeration head, an air compressor, a controller, a third overflow pipe, a water outlet valve, a membrane component and a sludge reflux pump; the air compressor, the gas flowmeter and the aeration head are connected through pipelines in sequence, and the aeration head is positioned in the low-oxygen denitrification reaction vessel; the controller is respectively connected with the dissolved oxygen sensor and the air compressor; the controller controls the air compressor through the dissolved oxygen value of the dissolved oxygen sensor, the air compressor stops running when the dissolved oxygen is more than 0.07mg/L, and the air compressor starts running when the dissolved oxygen is less than 0.02 mg/L. The stirring blades of the second stirrer are positioned in the low-oxygen denitrification reaction vessel; the membrane component is arranged on the inner wall of the low-oxygen denitrification reaction container, and water is discharged from the membrane component; the invention adopts the controller to control the dissolved oxygen in the low-oxygen denitrification reactor, ensures that complete nitrifying bacteria can perform nitrifying action, and anaerobic ammonia oxidation can not be inhibited by oxygen. The tank body of the urban sewage raw water tank is connected with the water inlet pipe of the anaerobic reaction container of the anaerobic reactor through a water inlet pump, and the water pump is used for conveying sewage in the urban sewage raw water tank to the anaerobic reactor; the water outlet pipe of the anaerobic reactor is connected with the low-oxygen denitrification reaction container; the sludge reflux pump is respectively connected with the pipeline among the low-oxygen denitrification reaction container, the water inlet pump of the municipal sewage raw water tank and the water inlet valve of the anaerobic reactor through pipelines.
Furthermore, the membrane component consists of a polyethylene hollow fiber membrane, the pore diameter of the membrane fiber is 0.1 mu m, and the membrane can intercept microbial cells, so that the microbial cells can not pass through, further remain in the reactor, and the reactor has longer sludge age. Because the growth rates of the anaerobic ammonia oxidizing bacteria and the complete nitrifying bacteria are low, the denitrification effect caused by biomass loss is prevented.
Further, peristaltic pumps are connected to the membrane modules to keep the water level in the MBR (membrane bioreactor) constant.
The invention discloses a method for deep denitrification by coupling internal carbon source short-cut denitrification anaerobic ammoxidation based on hypoxia complete nitrification, which adopts the device of any one of the invention, and comprises the following steps:
starting a system: inoculating common activated sludge of the municipal sewage plant, and adding the common activated sludge into an anaerobic reaction vessel to ensure that the sludge concentration is 2000-4000mg/L; mixing anaerobic ammonia oxidation sludge and enrichment culture complete nitrified sludge, and then adding the mixture into a low-oxygen denitrification reaction vessel to enable the sludge concentration to reach 1500-3000mg/L, and adjusting the sludge concentration of two bacteria within the sludge concentration range to enable the ratio of the aerobic ammonia oxidation rate to the anaerobic ammonia oxidation rate in the reactor to be 1.1-1.5.
The runtime adjustment operation is as follows:
(1) The sludge age of the anaerobic reactor is controlled to be 3-10d, the sludge age of the low-oxygen denitrification reactor is controlled to be 10-30d, the hydraulic retention time is 30-60min, and the sludge reflux ratio is 30-100%;
(2) Adding wastewater containing ammonia nitrogen and COD into an urban sewage raw water tank;
(3) The wastewater sequentially passes through an urban sewage raw water tank, an anaerobic reactor and a low-oxygen denitrification reactor in sequence;
(4) Opening a power supply of a dissolved oxygen controller to start an air compressor, filling oxygen into the low-oxygen denitrification reactor, and monitoring and controlling the change condition of the dissolved oxygen in the reactor by the controller in real time to maintain the dissolved oxygen between 0.02 and 0.07 mg/L;
(5) Starting a sludge reflux pump to reflux a sludge-water mixture in the low-oxygen denitrification reactor into the anaerobic reactor, and supplementing the bacterial load of the anaerobic reactor to ensure that an internal carbon source can be completely stored in the anaerobic reactor; when the nitrate nitrogen in the effluent rises, the sludge reflux ratio is increased, and the initial sludge reflux ratio is set to be 30%.
The denitrification principle of the invention: firstly, municipal sewage is pumped into an anaerobic reactor, organic matters in the sewage are converted into an internal carbon source and stored in activated sludge, then effluent enters a low-oxygen denitrification reactor where anaerobic ammonia oxidizing bacteria and complete nitrifying bacteria are symbiotic in a sludge-water mixture mode, the concentration of dissolved oxygen is controlled by a controller, the coexistence of the anaerobic ammonia oxidizing bacteria and the complete nitrifying bacteria is realized under the low-oxygen condition, the complete nitrification-short-cut denitrification-anaerobic ammonia oxidation autotrophic denitrification process is realized by utilizing the internal carbon source, and energy conservation, consumption reduction and deep denitrification are realized.
Compared with the prior art, the invention has the beneficial effects that:
compared with the prior traditional biological denitrification process, the method has the following advantages:
1) The short-cut denitrification anaerobic ammonia oxidation reduces the carbon source demand, so that the denitrification process saves organic carbon sources;
2) The anaerobic ammoxidation reaction does not need to carry out aerobic oxidation on part of ammonia nitrogen, so that the oxygen demand is reduced, and the aeration quantity is reduced;
3) The complete nitrification and the short-cut denitrification anaerobic ammonia oxidation occur simultaneously, 100% nitrogen removal can be realized theoretically, and the invention can realize deep denitrification;
4) N in anaerobic ammoxidation process 2 The emission of O is small, so that the emission of greenhouse gases in the sewage treatment process is reduced, and the goals of carbon peak reaching and carbon neutralization are realized.
Drawings
FIG. 1 is a schematic structural diagram of a device for deep denitrification by coupling internal carbon source short-cut denitrification anaerobic ammonia oxidation based on low-oxygen complete nitrification.
In the figure, a raw water tank of municipal sewage is shown as 1, an anaerobic reactor is shown as 2, and a low-oxygen denitrification reactor is shown as 3; 10 is a box body, 11 is a first overflow pipe, 12 is a blow-down pipe and 13 is a water inlet pump; 20 is an anaerobic reaction vessel, 21 is a water inlet valve, 22 is a first stirrer, and 23 is a second overflow pipe; 30 is a low-oxygen denitrification reaction vessel, 31 is a second stirrer, 32 is an aeration head, 33 is a gas flowmeter, 34 is an air compressor, 35 is a controller, 36 is a third overflow pipe, 37 is a water outlet valve, 38 is a membrane component, 310 is a sludge reflux pump, and 311 is a dissolved oxygen sensor.
Detailed Description
In order to better understand the technical content of the present invention, the following provides specific examples to further illustrate the present invention.
The experimental methods used in the embodiment of the invention are conventional methods unless otherwise specified.
Materials, reagents, and the like used in the examples of the present invention are commercially available unless otherwise specified.
As shown in figure 1, the device for deep denitrification by coupling internal carbon source short-cut denitrification anaerobic ammonia oxidation based on low-oxygen complete nitrification comprises a municipal sewage raw water tank 1, an anaerobic reaction vessel 20 and a low-oxygen denitrification reactor 3; the urban sewage raw water tank 1 comprises a tank body 10, a first overflow pipe 11, a blow-down pipe 12 and a water inlet pump 13, wherein the first overflow pipe 11 is positioned on the upper side of the tank body 10, the blow-down pipe 12 is positioned at the bottom of the tank body 10, and the water inlet pump 13 is positioned on the lower side of the tank body 10; the anaerobic reactor 2 comprises an anaerobic reaction vessel 20, a water inlet valve 21, a first stirrer 22 and a second overflow pipe 23, wherein the second overflow pipe 23 is positioned on the upper side of the anaerobic reaction vessel 20, and stirring blades of the first stirrer 22 are positioned inside the anaerobic reaction vessel 20; the hypoxia denitrification reactor 3 comprises a hypoxia denitrification reaction vessel 30, a second stirrer 31, an aeration head 32, a gas flowmeter 33, an air compressor 34, a controller 35, a third overflow pipe 36, a water outlet valve 37, a membrane module 38, a sludge reflux pump 310 and a dissolved oxygen sensor 311; the air compressor 34, the gas flowmeter 33 and the aeration head 32 are connected through pipelines in sequence, and the aeration head 32 is positioned in the low-oxygen denitrification reaction vessel 30; the controller 35 is a dissolved oxygen controller, and the controller 35 is respectively connected with the dissolved oxygen sensor 311 and the air compressor 34; the controller 35 controls the air compressor 34 by the dissolved oxygen value of the dissolved oxygen sensor 311, and when the dissolved oxygen is greater than 0.07mg/L, the air compressor 34 stops operating, and when the dissolved oxygen is less than 0.02mg/L, the air compressor 34 starts operating. The stirring blade of the second stirrer 31 is positioned inside the low-oxygen denitrification reaction vessel 30; the membrane module 38 is composed of a polyethylene hollow fiber membrane and is installed on the inner wall of the hypoxia denitrification reaction container 30, and the membrane module 38 is connected with a peristaltic pump to keep the water level in the MBR constant. The tank body 10 of the urban sewage raw water tank 1 is connected with a water inlet pipe of an anaerobic reaction container 20 through a water inlet pump 13; the water outlet pipe of the anaerobic reaction vessel 20 is connected with the low-oxygen denitrification reaction vessel 30; the sludge reflux pump 310 is respectively connected with the pipelines among the low-oxygen denitrification reaction container 30, the water inlet pump 13 of the municipal sewage raw water tank 1 and the water inlet valve 21 of the anaerobic reactor through pipelines; the urban sewage raw water tank 1 is connected with a water inlet pipe of the anaerobic reactor 2; the water outlet pipe of the anaerobic reactor 2 is connected with the low-oxygen denitrification reaction vessel 3; the sludge reflux pump 310 is respectively connected with the pipelines among the low-oxygen denitrification reaction container 3, the municipal sewage raw water tank 1 and the anaerobic reaction container 2 through pipelines.
The test simulates urban sewage as raw water, and the specific water quality is as follows: COD concentration is 130-280mg/L;the concentration is 60-89 mg/L->As shown in FIG. 1, the test system is characterized in that the anaerobic reaction vessel 20 and the low-oxygen denitrification reaction vessel 30 are both made of organic glass, the effective volume of the anaerobic reaction vessel 20 is 10L, the effective volume of the low-oxygen denitrification reaction vessel 30 is 10L, and the effective volume of the municipal sewage raw water tank is 20L.
The specific operation is as follows:
1) Starting a system: inoculating common activated sludge of the municipal sewage plant, and adding the common activated sludge into the anaerobic reaction vessel 20 to ensure that the sludge concentration is 2000-4000mg/L; mixing anaerobic ammonia oxidation sludge and enrichment culture complete nitrified sludge, and then adding the mixture into a low-oxygen denitrification reaction vessel 30 to enable the sludge concentration to reach 1500-3000mg/L, and adjusting the sludge concentration of two bacteria within the sludge concentration range to enable the ratio of the aerobic ammonia oxidation rate to the anaerobic ammonia oxidation rate in the low-oxygen denitrification reaction vessel 30 to be 1.1-1.5;
the runtime adjustment operation is as follows:
2.1 The sludge age of the anaerobic reactor 2 is controlled to be 3-10d, the sludge age of the low-oxygen denitrification reactor 3 is controlled to be 10-30d, the hydraulic retention time is 30-60min, and the sludge reflux ratio is 30-100%;
2.2 Adding simulated wastewater containing ammonia nitrogen and COD into the municipal sewage raw water tank 10;
2.3 The simulated wastewater sequentially passes through the municipal sewage raw water tank 10, the anaerobic reactor 20 and the low-oxygen denitrification reactor 30;
2.4 The power of the dissolved oxygen controller 36 is turned on to turn on the switch of the air compressor 34, oxygen is filled into the low-oxygen denitrification reactor 30, and the change condition of the dissolved oxygen in the low-oxygen denitrification reactor 30 is monitored and controlled by the controller 36 in real time, so that the dissolved oxygen is maintained between 0.02 and 0.07 mg/L;
2.5 A sludge reflux pump 310 is started to reflux the sludge-water mixture in the low-oxygen denitrification reactor 3 into the anaerobic reactor 2, and the bacterial load of the anaerobic reactor 2 is supplemented to ensure that the internal carbon source can be completely stored therein; when the nitrate nitrogen in the effluent rises, the sludge reflux ratio is increased, and the initial sludge reflux ratio is set to be 30%.
Preferably, the membrane fiber has a pore size of 0.1 μm, and the microbial cells cannot pass through and remain in the reactor. Because the growth rates of the anaerobic ammonia oxidizing bacteria and the complete nitrifying bacteria are low, the denitrification effect caused by biomass loss is prevented.
The test results show that: after stable operation, the COD concentration of the effluent of the anaerobic reactor is 30-60mg/L, the concentration is 55-80mg/L>The concentration is 0.1-3.5 mg/L->The concentration is 0.1-1.0mg/L; the COD concentration of the effluent of the hypoxia denitrification reactor is 20-30mg/L, and the concentration of the effluent of the hypoxia denitrification reactor is->The concentration is 0-10mg/L>The concentration is 0-3.0 mg/L->The concentration is 0-4.0mg/L. Compared with the traditional biological denitrification process, the method can save the oxygen consumption by 60-95%, and reduce the total nitrogen in the effluent by 50-200%.
In summary, urban sewage firstly enters an anaerobic reactor, organic matters in the sewage are converted into an internal carbon source form and stored in activated sludge, and then effluent enters a low-oxygen denitrification reactor where anaerobic ammonia oxidizing bacteria and complete nitrifying bacteria are symbiotic, so that complete nitrification-short-range denitrification anaerobic ammonia oxidation autotrophic denitrification is realized; the low-oxygen denitrification reactor controls the dissolved oxygen within a target range through a controller, realizes coexistence of anaerobic ammonia oxidizing bacteria and complete nitrifying bacteria under a low-oxygen condition, realizes a complete nitrification-short-range denitrification-anaerobic ammonia oxidation autotrophic denitrification process by utilizing an internal carbon source, and realizes energy conservation, consumption reduction and deep denitrification.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (4)
1. A method for deep denitrification by short-cut denitrification anaerobic ammoxidation based on low-oxygen complete nitrification coupling internal carbon source is characterized in that a device for deep denitrification by short-cut denitrification anaerobic ammoxidation based on low-oxygen complete nitrification coupling internal carbon source is adopted, and the device comprises an urban sewage raw water tank, an anaerobic reactor and a low-oxygen denitrification reactor; the low-oxygen denitrification reactor comprises a low-oxygen denitrification reaction container, a second stirrer, an aeration head, an air compressor, a gas flowmeter, a controller, a third overflow pipe, a water outlet valve, a membrane component and a sludge reflux pump; the air compressor, the gas flowmeter and the aeration head are connected through pipelines in sequence, and the aeration head is positioned in the low-oxygen denitrification reaction vessel; the controller is respectively connected with the dissolved oxygen sensor and the air compressor; the stirring blades of the second stirrer are positioned in the low-oxygen denitrification reaction vessel; the membrane component is arranged on the inner wall of the low-oxygen denitrification reaction vessel; the urban sewage raw water tank is connected with a water inlet pipe of the anaerobic reactor; the water outlet pipe of the anaerobic reactor is connected with the low-oxygen denitrification reaction container; the sludge reflux pump is respectively connected with the pipelines among the low-oxygen denitrification reaction container, the municipal sewage raw water tank and the anaerobic reactor through pipelines; the membrane component consists of a polyethylene hollow fiber membrane;
the method comprises the following steps: starting a system: inoculating common activated sludge of the municipal sewage plant, and adding the common activated sludge into an anaerobic reaction vessel to ensure that the sludge concentration is 2000-4000mg/L; mixing anaerobic ammonia oxidation sludge and enrichment culture complete nitrified sludge, and then adding the mixture into a low-oxygen denitrification reaction container to enable the sludge concentration to reach 1500-3000mg/L, and adjusting the sludge concentration of two bacteria within the sludge concentration range to enable the ratio of the aerobic ammonia oxidation rate to the anaerobic ammonia oxidation rate in the low-oxygen denitrification reactor to be 1.1-1.5;
opening a power supply of a dissolved oxygen controller to start an air compressor, filling oxygen into the low-oxygen denitrification reactor, and monitoring and controlling the change condition of the dissolved oxygen in the reactor by the controller in real time to maintain the dissolved oxygen between 0.02 and 0.07 mg/L;
starting a sludge reflux pump to reflux a sludge-water mixture in the low-oxygen denitrification reactor into the anaerobic reactor, and supplementing the bacterial load of the anaerobic reactor to ensure that an internal carbon source can be completely stored in the anaerobic reactor; when the nitrate nitrogen in the effluent rises, the sludge reflux ratio is increased, and the initial sludge reflux ratio is set to be 30%;
the urban sewage raw water tank comprises a tank body, a first overflow pipe, a blow-down pipe and a water inlet pump, wherein the first overflow pipe and the blow-down pipe are arranged on the tank body, and the water inlet pump is used for conveying sewage in the urban sewage raw water tank to the anaerobic reactor;
the anaerobic reactor comprises an anaerobic reaction container, a water inlet valve, a first stirrer and a second overflow pipe, wherein the second overflow pipe is arranged on the anaerobic reaction container, and stirring blades of the first stirrer are arranged inside the anaerobic reaction container.
2. The method according to claim 1, wherein the polyethylene hollow fiber membrane has a membrane fiber pore size of 0.1 μm, and the membrane module is connected to a peristaltic pump.
3. The method according to claim 1, wherein the sludge age of the anaerobic reactor is controlled between 3 and 10d; the sludge age of the low-oxygen denitrification reactor is controlled to be 10-30d, the hydraulic retention time is 30-60min, and the sludge reflux ratio is 30-100%.
4. A method according to claim 3, wherein the wastewater containing ammonia nitrogen and COD is added to a raw municipal wastewater tank, and the wastewater is sequentially passed through the raw municipal wastewater tank, the anaerobic reactor and the low-oxygen denitrification reactor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111338840.5A CN114105296B (en) | 2021-11-12 | 2021-11-12 | Device and method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation |
| AU2021290368A AU2021290368B1 (en) | 2021-11-12 | 2021-11-22 | Device and method for advanced nitrogen removal based on complete nitrification coupled with endogenous partial-denitrification/anammox under low oxygen condition |
| PCT/CN2021/131997 WO2023082316A1 (en) | 2021-11-12 | 2021-11-22 | Anaerobic ammonia oxidation deep denitrification method and apparatus based on low-oxygen total nitrification coupled with internal carbon source shortcut denitrification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111338840.5A CN114105296B (en) | 2021-11-12 | 2021-11-12 | Device and method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114105296A CN114105296A (en) | 2022-03-01 |
| CN114105296B true CN114105296B (en) | 2023-07-25 |
Family
ID=80378986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111338840.5A Active CN114105296B (en) | 2021-11-12 | 2021-11-12 | Device and method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114105296B (en) |
| WO (1) | WO2023082316A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117509898A (en) * | 2023-12-05 | 2024-02-06 | 瑞盛环境股份有限公司 | Solid phase opposite nitrification-anaerobic ammonia oxidation low-carbon domestic sewage treatment device and process |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110572B (en) * | 2015-09-20 | 2017-07-14 | 北京工业大学 | A kind of apparatus and method of carbon source absorption/nitrification/part denitrification/low C/N municipal sewages of Anammox coupling technique processing |
| CN106006963B (en) * | 2016-05-28 | 2019-03-22 | 北京工业大学 | A kind of device and method that SBR denitrification dephosphorization synchronizes endogenous short-cut denitrification Anammox |
| CN106830302B (en) * | 2017-01-20 | 2022-08-30 | 浙江大学 | MBR (membrane bioreactor) whole course nitrobacteria enrichment device and method for automatically controlling dissolved oxygen |
| WO2021146212A1 (en) * | 2020-01-13 | 2021-07-22 | University Of Washington | Microbe-based systems, compositions, and methods thereof |
| CN111847775A (en) * | 2020-07-10 | 2020-10-30 | 珠海九通水务股份有限公司 | Sewage treatment process |
| CN112299559B (en) * | 2020-09-07 | 2022-07-05 | 太原理工大学 | Whole-process nitrification, short-process denitrification and anaerobic ammonia oxidation single-stage coupling process control method |
-
2021
- 2021-11-12 CN CN202111338840.5A patent/CN114105296B/en active Active
- 2021-11-22 WO PCT/CN2021/131997 patent/WO2023082316A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023082316A1 (en) | 2023-05-19 |
| CN114105296A (en) | 2022-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109502906B (en) | Urban sewage main side flow anaerobic ammonia oxidation co-denitrification process device and application method thereof | |
| CN103058461B (en) | Municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation | |
| CN107285466A (en) | The sewage-treatment plant and processing method of bubble-free aeration bioreactor synchronous nitration and denitrification | |
| CN109160606B (en) | Method for producing methane and efficiently and deeply denitrifying urban sewage | |
| CN104058551A (en) | Energy-saving high-efficiency municipal sewage autotrophic denitrification biological treatment method and device | |
| CN101264978B (en) | Method for fast realizing short distance deep denitrogenation by SBR process | |
| CN103183447A (en) | Treatment method of piggery wastewater | |
| CN104529056A (en) | Method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge | |
| CN108658229B (en) | Device and method for controlling autotrophic/heterotrophic deep denitrification process | |
| CN114890551A (en) | Tandem type biological denitrification method based on bacterial-algae symbiosis | |
| CN114105296B (en) | Device and method for deep denitrification based on low-oxygen complete nitrification and coupling of internal carbon source short-range denitrification anaerobic ammonia oxidation | |
| CN205328793U (en) | Formula sewage treatment plant is used to MABR and MBR antithetical couplet | |
| CN112250179B (en) | Device and method for realizing short-cut nitrification-anaerobic ammonia oxidation denitrification in sewage treatment continuous flow process through sludge fermentation product | |
| CN113354106A (en) | Sewage treatment system and method for denitrification nitrogen and phosphorus removal | |
| CN112340843A (en) | Device and method for realizing integrated decarbonization and denitrification of methanogenesis anaerobic ammonium oxidation | |
| CN109879428B (en) | Method for realizing short-cut denitrification process of municipal sewage by using delayed anaerobic/low-carbon anoxic SBR | |
| CN204111537U (en) | The device of internal carbon source denitrification coupling Anammox Treating Municipal Sewage | |
| CN209853829U (en) | Device for realizing low-oxygen deep denitrification of domestic sewage by regulating flora structure | |
| CN108793614B (en) | Continuous sewage treatment method and device | |
| CN203048739U (en) | Urban wastewater partial nitrification and anaerobic ammonia oxidation denitrification device strengthening energy recovery | |
| AU2021290368B1 (en) | Device and method for advanced nitrogen removal based on complete nitrification coupled with endogenous partial-denitrification/anammox under low oxygen condition | |
| CN112759192A (en) | Method for treating breeding sewage of dairy farm | |
| CN111217489A (en) | Sewage purification equipment for strengthening ammonia nitrogen removal capability of village and town sewage | |
| CN116395854B (en) | Device and method for self-induced shortcut nitrification-denitrification of waste water anaerobic digestion liquid | |
| CN117003390B (en) | Three-reflux multistage A/O device and method for strengthening endogenous synchronous denitrification and dephosphorization sludge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |