CN117326683A - Method for reinforcing low-temperature sewage co-metabolism treatment by recycling high-concentration organic wastewater - Google Patents
Method for reinforcing low-temperature sewage co-metabolism treatment by recycling high-concentration organic wastewater Download PDFInfo
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- CN117326683A CN117326683A CN202311557739.8A CN202311557739A CN117326683A CN 117326683 A CN117326683 A CN 117326683A CN 202311557739 A CN202311557739 A CN 202311557739A CN 117326683 A CN117326683 A CN 117326683A
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- 239000010865 sewage Substances 0.000 title claims abstract description 45
- 239000002351 wastewater Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 10
- 238000006731 degradation reaction Methods 0.000 claims abstract description 19
- 230000015556 catabolic process Effects 0.000 claims abstract description 18
- 239000005416 organic matter Substances 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 40
- 238000005273 aeration Methods 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000010802 sludge Substances 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 11
- 231100000719 pollutant Toxicity 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000003344 environmental pollutant Substances 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000014759 maintenance of location Effects 0.000 claims description 5
- 230000000593 degrading effect Effects 0.000 claims description 4
- 208000028659 discharge Diseases 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 229920005372 Plexiglas® Polymers 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000469 ethanolic extract Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 239000004480 active ingredient Substances 0.000 claims 1
- 239000010840 domestic wastewater Substances 0.000 claims 1
- 230000002708 enhancing effect Effects 0.000 claims 1
- 239000004926 polymethyl methacrylate Substances 0.000 claims 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 12
- 230000000813 microbial effect Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 7
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 5
- 230000036284 oxygen consumption Effects 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 230000009467 reduction Effects 0.000 abstract description 2
- 244000005700 microbiome Species 0.000 description 11
- 230000008569 process Effects 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 238000002481 ethanol extraction Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 241001074903 Methanobacteria Species 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000004791 biological behavior Effects 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 230000010261 cell growth Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000010826 pharmaceutical waste Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
-
- 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
-
- 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)
- Activated Sludge Processes (AREA)
Abstract
The invention relates to a method for reinforcing low-temperature sewage co-metabolism treatment by recycling high-concentration organic wastewater, and relates to the technical field of sewage treatment. Solves the technical problem of low treatment effect of the sewage treatment plant in the low temperature state in the prior art. The method for reinforcing the co-metabolism treatment of low-temperature sewage by recycling high-concentration organic wastewater adopts the high-concentration organic wastewater as an easily degradable organic matter, and is mixed with domestic sewage for treatment, thereby promoting the reduction of refractory organic matters in the low-temperature environmental sewage and simultaneously realizing the recycling of pharmaceutical wastewater. The experimental results show that: under the condition of low temperature (10 ℃), compared with the control group, the degradation rate of the soluble organic matters is improved by 18 percent and the degradation rate of ammonia nitrogen is improved by 28 percent by adding ethanol to extract the pharmaceutical wastewater. In addition, compared with the control group, the microbial oxygen consumption rate is improved by 49%, and the microbial activity is obviously improved.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for reinforcing low-temperature sewage co-metabolism treatment by recycling high-concentration organic wastewater.
Background
At present, the domestic sewage treatment process mainly adopts a physical and chemical technology and takes biological treatment as a main process, and the centralized sewage treatment rate of the domestic sewage treatment process is 81.6 percent of the total national number. However, in cold regions of China, sewage treatment processes face a number of challenges. The cold regions in China are generally distributed in cold temperate regions, middle temperate regions, north regions and high-altitude regions, and the main geographic modules are divided into northeast regions, qinghai-Tibet plateau regions, xinjiang regions and the like, and account for 43.5% of the total land area in China. The average temperature of the coldest month in the cold region of China is-10-0 ℃, the average daily temperature is less than or equal to 5 ℃ for 90-145 days, the lowest air temperature is below-30 ℃, and some towns are in the permafrost region.
Studies have shown that whenever the temperature is reduced by 10 ℃, the microbial activity will be reduced by 50% and the biodegradation efficiency of organics by approximately 60%. When the sewage temperature is as low as 8-15 ℃, the microbial activity, the substrate utilization rate and the cell growth can be seriously inhibited, so that the biological process treatment effect is deteriorated. When the temperature of the sewage is below 5 ℃, the microorganisms are in a dormant state, and the biological behaviors are almost stopped. In the traditional activated sludge treatment process, most of functional microorganism flora optimally grows at the temperature of 30-35 ℃. When the temperature is reduced to 4 ℃ compared with 37 ℃, the activity and hydrolysis rate constant of methanobacteria are reduced by 80% -90%, and the activity and nitrification rate of nitrifying bacteria are reduced by 77%. Thus, the typically low temperature characteristics of cold areas present challenges to biological wastewater treatment.
The strategy of microbial co-metabolism may be an effective way to solve this problem, and the easily degradable substrate in the co-metabolism process is usually an electron donor in the degradation process of the microorganism, and at the same time, serves as a carbon source to provide energy for the microorganism, so as to enhance the activity of the microorganism. At present, most domestic sewage treatment plants increase the treatment efficiency by adding carbon sources such as glucose, sodium acetate and methanol as easily degradable organic matters, but the added carbon sources not only increase the cost of the sewage treatment plants, but also generate a large amount of greenhouse gases. Therefore, an effective method is needed to solve the bottleneck problem of low treatment effect of sewage treatment plants in low temperature.
Disclosure of Invention
The invention aims to solve the technical problem of low treatment effect of a sewage treatment plant in a low-temperature state in the prior art, and provides a method for reinforcing co-metabolism treatment of low-temperature sewage by recycling high-concentration organic wastewater. The method is based on the co-metabolism theory and utilizes the high-concentration traditional Chinese medicine extracting solution to prepare the pharmaceutical wastewater and the low-temperature sewage for mixed strengthening treatment.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a method for reinforcing low-temperature sewage co-metabolism treatment by recycling high-concentration organic wastewater comprises the following steps:
in a low-temperature environment, high-concentration organic wastewater is used as an easily degradable organic matter, and activated sludge is used for treating domestic sewage to degrade pollutants.
In the technical scheme, the Chemical Oxygen Demand (COD) concentration of the high-concentration organic wastewater ranges from 2000 mg/L to 50000mg/L.
In the technical scheme, the high-concentration organic wastewater is Chinese medicine ethanol extract wastewater generated in the extraction process of the effective components of pharmaceutical enterprises, and the COD concentration is 50000mg/L.
In the technical scheme, the Chemical Oxygen Demand (COD) concentration range of the domestic sewage is 200-400 mg/L, and the activated sludge concentration (MLSS) is 3500mg/L.
In the above technical scheme, the temperature of the low-temperature environment is 10 ℃.
In the technical scheme, the weight ratio of the high-concentration organic wastewater to the domestic sewage is 1:200.
A method for reinforcing low-temperature sewage co-metabolism treatment by recycling high-concentration organic wastewater, which is applicable to an SBR wastewater treatment device, comprises the following steps: an organic glass barrel and an aeration pump;
a water inlet is formed in one side of the organic glass barrel, and a water outlet is formed in one side of the organic glass barrel; an aeration disc is arranged at the bottom of the organic glass barrel and is connected with the aeration pump; a heating rod and a stirrer are arranged inside the organic glass barrel;
the method comprises the following steps:
step 1, domestic sewage enters an organic glass barrel filled with activated sludge and high-concentration organic wastewater from the water inlet;
step 2, starting an aeration pump, and keeping the system in a good-raising state after the aeration disc starts aeration;
and 3, maintaining a low-temperature environment required by degradation by using the heating rod, and degrading pollutants by using activated sludge in the organic glass barrel under the condition of stirring by a stirrer.
In the technical scheme, the stirrer is supported and inserted into the interior of the organic glass barrel through the external bracket; the heating rod is attached to the inner wall of the organic glass barrel through a sucker; the aeration disc is arranged at the bottom of the organic glass barrel through threads.
In the technical scheme, the total hydraulic retention time of the SBR wastewater treatment device is 12h, and the SBR wastewater treatment device comprises a water inlet stage of 0.5h, an aeration stage of 9h, a precipitation stage of 1h, a water discharge stage of 0.5h and a standby stage of 1h.
The beneficial effects of the invention are as follows:
the method for reinforcing the co-metabolism treatment of low-temperature sewage by recycling high-concentration organic wastewater adopts the high-concentration organic wastewater as an easily degradable organic matter, and is mixed with domestic sewage for treatment, thereby promoting the reduction of refractory organic matters in the low-temperature environmental sewage and simultaneously realizing the recycling of pharmaceutical wastewater.
The high-concentration organic wastewater represented by ethanol extraction pharmaceutical wastewater is used as a co-metabolism matrix for enhanced biological treatment, has great application potential, is used as a carbon source to be added into a cold region sewage treatment plant for enhanced low-temperature microbial degradation, can change waste into valuables, reduce the running cost, can reduce the emission of greenhouse gases, and can provide guidance for the resource utilization of wastewater and enhanced microbial degradation in a low-temperature state.
The experimental results show that: under the condition of low temperature (10 ℃), compared with the control group, the degradation rate of the soluble organic matters is improved by 18 percent and the degradation rate of ammonia nitrogen is improved by 28 percent by adding ethanol to extract the pharmaceutical wastewater. In addition, compared with the control group, the microbial oxygen consumption rate is improved by 49%, and the microbial activity is obviously improved.
Drawings
The invention is described in further detail below with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of a SBR wastewater treatment apparatus to which the method of the present invention is applied.
Reference numerals in the drawings denote:
1-stirrer, 2-water inlet, 3-water outlet, 4-heating rod, 5-aeration disc, 6-aeration pump, 7-organic glass barrel.
Detailed Description
Example 1:
control group. An SBR wastewater treatment device suitable for the method of the invention is constructed according to FIG. 1, which comprises a organic glass barrel 7 and an aeration pump 6; the diameter of the organic glass barrel 7 is 15cm and the height is 30cm. The total volume is 5.3L, and the effective volume is 4L; a water inlet 2 is formed in one side of the organic glass barrel 7, and a water outlet 3 is formed in one side of the organic glass barrel; an aeration disc 5 is arranged at the bottom of the organic glass barrel 7, and the aeration disc 5 is connected with the aeration pump 6; the interior of the plexiglass tub 7 is provided with a heating rod 4 and a stirrer 1. The stirrer 1 is supported and inserted into the interior of the organic glass barrel 7 through an external bracket; the heating rod 4 is attached to the inner wall of the organic glass barrel 7 through a sucker; the aeration disc 5 is arranged at the bottom of the organic glass barrel 7 through threads.
Domestic sewage is fed into the organic glass barrel 7 through the water inlet 2, and after the aeration pump 6 is aerated, the system is kept in an aerobic state (DO>2 mg/L), the activated sludge contained in the inside of the SBR reactor, namely the organic glass tank 7, is used for degrading pollutants. The total hydraulic retention time of the SBR reactor is 12h, and mainly comprises a water inlet stage of 0.5h, an aeration stage of 9h, a precipitation stage of 1h, a water discharge stage of 0.5h and a standby stage of 1h. Activated sludge was obtained from municipal wastewater treatment plants at a water intake stage, and the sludge concentration (MLSS) was 3500mg/L. The test water is domestic sewage and has chemical oxygen demandThe amount (COD) is 200-400 mg/L. Degradation was performed using a heating rod 4 under low temperature (10 ℃) conditions and under stirring by a stirrer 1. After 12 hours, the degradation rate of microorganisms to TOC is 45% and the degradation rate to ammonia nitrogen is 66% as measured by the water outlet of the water outlet 3. The specific oxygen consumption rate of the microorganism is 3.5mgO 2 /(g MLSS.h). The microorganism has low biological activity and poor degradation capability to pollutants.
Example 2:
experimental groups. An SBR wastewater treatment device suitable for the method of the invention is constructed according to FIG. 1, which comprises a organic glass barrel 7 and an aeration pump 6; the diameter of the organic glass barrel 7 is 15cm and the height is 30cm. The total volume is 5.3L, and the effective volume is 4L; a water inlet 2 is formed in one side of the organic glass barrel 7, and a water outlet 3 is formed in one side of the organic glass barrel; an aeration disc 5 is arranged at the bottom of the organic glass barrel 7, and the aeration disc 5 is connected with the aeration pump 6; the interior of the plexiglass tub 7 is provided with a heating rod 4 and a stirrer 1. The stirrer 1 is supported and inserted into the interior of the organic glass barrel 7 through an external bracket; the heating rod 4 is attached to the inner wall of the organic glass barrel 7 through a sucker; the aeration disc 5 is arranged at the bottom of the organic glass barrel 7 through threads.
Domestic sewage is fed into the organic glass barrel 7 through the water inlet 2, and after the aeration pump 6 is aerated, the system is kept in an aerobic state (DO>2 mg/L), and ethanol is used for extracting pharmaceutical wastewater (COD concentration is 50000 mg/L) as an easily degradable organic matter, and pollutant degradation is carried out through a reactor, namely activated sludge in the organic glass barrel 7. The ethanol extraction pharmaceutical wastewater is obtained from Tonghua Troma pharmaceutical company, inc., and has COD concentration of 50000mg/L and main components of ethanol, lignin, etc. The total hydraulic retention time of the SBR reactor is 12h, and mainly comprises a water inlet stage of 0.5h, an aeration stage of 9h, a precipitation stage of 1h, a water discharge stage of 0.5h and a standby stage of 1h. Activated sludge was obtained from municipal wastewater treatment plants at a water intake stage, and the sludge concentration (MLSS) was 3500mg/L. The test water is domestic sewage, and the Chemical Oxygen Demand (COD) is 200-400 mg/L. The weight ratio of the ethanol extraction pharmaceutical wastewater to the domestic sewage is 1:200, and degrading at low temperature (10deg.C). After 12 hours, the degradation rate of microorganisms to TOC is 63% and to ammonia nitrogen is measured by the water outlet of the water outlet 3The degradation rate was 94%. The specific oxygen consumption rate of the microorganism is 5.2mgO 2 /(g MLSS·h)。
By comparing the control group with the experimental group, the mixed treatment of the ethanol pharmaceutical wastewater and the sewage can promote the degradation of the microorganism on the soluble organic matters under the low-temperature condition. The experimental results show that: under the condition of low temperature (10 ℃), compared with the control group, the degradation rate of the soluble organic matters is improved by 18 percent and the degradation rate of ammonia nitrogen is improved by 28 percent by adding ethanol to extract the pharmaceutical wastewater. In addition, compared with the control group, the microbial oxygen consumption rate is improved by 49%, and the microbial activity is obviously improved. The high-concentration waste water represented by ethanol extraction pharmaceutical waste water is subjected to enhanced low-temperature sewage treatment, the waste water and sludge used in the embodiment have universality, the selected high-concentration organic waste water is not limited in type, and the COD concentration range of the selected high-concentration organic waste water is 2000-50000 mg/L, and the mixed treatment can be carried out according to a certain proportion so as to improve the treatment efficiency at low temperature. The low-temperature sewage treatment can be further enhanced by means of further optimizing the mixing proportion, adjusting the hydraulic retention time and the like.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, and that various changes and modifications may be made by one skilled in the art after reading the contents of the present invention, and the equivalent forms are also within the scope of the present invention as defined in the appended claims.
Claims (9)
1. The method for reinforcing the co-metabolism treatment of the low-temperature sewage by recycling the high-concentration organic wastewater is characterized by comprising the following steps of:
in a low-temperature environment, high-concentration organic wastewater is used as an easily degradable organic matter, and activated sludge is used for treating domestic sewage to degrade pollutants.
2. The method of claim 1, wherein the high concentration organic wastewater has a chemical oxygen demand concentration ranging from 2000 to 50000mg/L.
3. The method according to claim 1, wherein the high-concentration organic wastewater is ethanol extract wastewater of traditional Chinese medicine generated in the extraction process of active ingredients of pharmaceutical enterprises, and the COD concentration is 50000mg/L.
4. The method according to claim 1, wherein the chemical oxygen demand concentration of the domestic sewage is in the range of 200 to 400mg/L and the activated sludge concentration (MLSS) is 3500mg/L.
5. The method of claim 1, wherein the low temperature environment has a temperature of 10 ℃.
6. The method of claim 1, wherein the weight ratio of the high concentration organic wastewater to the domestic wastewater is 1:200.
7. A method for enhancing co-metabolism treatment of low-temperature sewage by recycling high-concentration organic wastewater according to any one of claims 1 to 6, characterized in that an SBR wastewater treatment device suitable for the method comprises: an organic glass barrel (7) and an aeration pump (6);
a water inlet (2) is formed in one side of the organic glass barrel (7), and a water outlet (3) is formed in one side of the organic glass barrel; an aeration disc (5) is arranged at the bottom of the organic glass barrel (7), and the aeration disc (5) is connected with the aeration pump (6); a heating rod (4) and a stirrer (1) are arranged in the organic glass barrel (7);
the method comprises the following steps:
step 1, domestic sewage enters an organic glass barrel (7) filled with activated sludge and high-concentration organic wastewater from the water inlet (2);
step 2, starting an aeration pump (6), and keeping the system in a good-raising state after the aeration disc (5) starts aeration;
and 3, maintaining a low-temperature environment required by degradation by using the heating rod (4), and degrading pollutants by using activated sludge in the organic glass barrel (7) under the condition of stirring by the stirrer (1).
8. The method according to claim 7, characterized in that the stirrer (1) is inserted inside the plexiglas tub (7) supported by an external bracket; the heating rod (4) is attached to the inner wall of the organic glass barrel (7) through a sucker; the aeration disc (5) is arranged at the bottom of the organic glass barrel (7) through threads.
9. The method according to claim 7, wherein the total hydraulic retention time of the SBR wastewater treatment device is 12 hours, and the method comprises a water inlet stage of 0.5 hours, an aeration stage of 9 hours, a precipitation stage of 1 hour, a water discharge stage of 0.5 hours and a standby stage of 1 hour.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117623494A (en) * | 2023-11-02 | 2024-03-01 | 东北师范大学 | Method for enhancing low-temperature biological denitrification of activated sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117623494A (en) * | 2023-11-02 | 2024-03-01 | 东北师范大学 | Method for enhancing low-temperature biological denitrification of activated sludge |
| CN117623494B (en) * | 2023-11-02 | 2024-06-25 | 东北师范大学 | Method for enhancing low-temperature biological denitrification of activated sludge |
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