Device and method for enhancing high-efficient denitrification of oxytetracycline pharmaceutical wastewater by integrated short-cut nitrification coupled with post-denitrification
Through the integrated short-range nitration coupled post-denitrification strengthening device and method, the anaerobic → aerobic → hypoxia operation mode of the sequence batch reactor is adopted to achieve efficient denitrification of oleracycin pharmaceutical wastewater without an added carbon source, solving the problems of high energy consumption, large demand for added carbon sources and poor water quality stability in the existing technology, ensuring that the treated water quality meets the emission standards.
Patent Information
- Application Number
- CN202411711077.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2044-11-27
AI Technical Summary
When treating oleracycin pharmaceutical wastewater, the prior art has problems such as high energy consumption, large demand for carbon sources, and poor water quality stability when treating oleracycin pharmaceutical industry, which is difficult to meet the limit requirements of the water pollution emission standards of fermented pharmaceutical industry.
The integrated short-range nitration coupled post-denitrification strengthening device and method are adopted to achieve efficient nitrogen removal of oleracycin pharmaceutical wastewater without carbon sources through the anaerobic → aerobic → hypoxia operation mode of the sequence batch reactor. The device includes components such as oleracycin wastewater inlet tank, water inlet pump, batch reactor, mechanical stirrer, aeration head, etc. Through technical means such as mechanical stirring, air aeration and temperature control systems, the pH value, dissolved oxygen and sludge concentration in the reactor are controlled to achieve effective nitrogen removal.
In the absence of added carbon sources, efficient biochemical denitrification of oleracycin pharmaceutical wastewater has been achieved, reducing energy consumption and operating costs, and ensuring that the treated water quality meets the limit requirements of the water pollution emission standards of fermented pharmaceutical industry.
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Abstract
Description
Technical Field
[0001] This application belongs to the field of biological sewage treatment. Specifically, it particularly relates to a device and method for enhancing the efficient nitrogen removal of oxytetracycline pharmaceutical wastewater by integrating short-cut nitrification and post-denitrification. Background Art
[0002] The sources of oxytetracycline pharmaceutical wastewater mainly include the production and processing wastewater of oxytetracycline base and the cleaning wastewater of workshop equipment. At present, the treatment methods for oxytetracycline pharmaceutical wastewater are mostly the process of "coagulation precipitation + hydrolysis acidification + anaerobic UASB reactor + A / O tank + secondary sedimentation tank + advanced oxidation + air flotation". However, due to the characteristics of high pollution load, strong toxicity, the existence of substances that are difficult to biodegradate, rapid water quality change and large water volume in oxytetracycline pharmaceutical wastewater, the above treatment process fluctuates during treatment, resulting in the treated water quality not being able to continuously and stably meet the limit requirements in the "Discharge Standard of Water Pollutants for Fermentation Pharmaceutical Industry" (GB21903-2008), which has a certain impact on the normal production of pharmaceutical enterprises.
[0003] At the same time, in the original "coagulation precipitation + hydrolysis acidification + anaerobic UASB reactor + A / O tank + secondary sedimentation tank + advanced oxidation + air flotation" process, the A / O tank treatment process has a relatively high energy consumption, and the operating power consumption can reach 1.28 kwh / t. Moreover, a large amount of external carbon source needs to be continuously added during the operation to maintain the denitrification performance in the above treatment process.
[0004] Therefore, the applicant believes that it is extremely urgent to find a low-carbon and efficient method for the advanced treatment of oxytetracycline pharmaceutical wastewater. Summary of the Invention
[0005] The purpose of this application is to provide a device and method for enhancing the efficient nitrogen removal of oxytetracycline pharmaceutical wastewater by integrating short-cut nitrification and post-denitrification, which can achieve biochemical nitrogen removal of oxytetracycline pharmaceutical wastewater with simple operation, fast startup and low energy consumption without adding external carbon source.
[0006] To achieve the above object, this application is realized through the following technical solutions:
[0007] The device for enhancing high - efficiency nitrogen removal of oxytetracycline pharmaceutical wastewater by integrated short - cut nitrification coupled with post - denitrification described in this application. The device includes an oxytetracycline wastewater inlet water tank, a feed pump, a feed pipe, a sequencing batch reactor, a mechanical stirrer, a pH and dissolved oxygen detector, a temperature control system, a sampling port, a drain valve, a sludge discharge valve, a gas flow meter, an air compressor pump, and an aeration head. Among them, the oxytetracycline wastewater inlet water tank is connected to the feeding port of the sequencing batch reactor through the feed pump and the feed pipe. An aeration head is also arranged inside the sequencing batch reactor, and the aeration head is connected to the air compressor pump through a pump pipe and a gas flow meter. A mechanical stirrer is also arranged in the sequencing batch reactor. A probe of the pH and dissolved oxygen detector is arranged in the sequencing batch reactor, and the pH and dissolved oxygen detector is connected to the probe located in the sequencing batch reactor through an electrical signal. The temperature control system is used to heat and keep warm the sequencing batch reactor. The sampling port, the drain valve, and the sludge discharge valve are arranged in the sequencing batch reactor from top to bottom in sequence.
[0008] The method for enhancing high - efficiency nitrogen removal of oxytetracycline pharmaceutical wastewater by integrated short - cut nitrification coupled with post - denitrification described in this application includes adopting a sequencing batch operation mode. The COD of the oxytetracycline pharmaceutical wastewater entering the biochemical system is 750 - 950 mg / L, the NH4 + -N is 90 - 130 mg / L, the TN is 110 - 150 mg / L, and the drainage ratio is 50%. The operation is carried out in the following steps:
[0009] Phase I: Take the aerobic activated sludge mixture from the aerobic tank of the AO reactor for actual treatment of oxytetracycline pharmaceutical wastewater. After precipitation, decant the supernatant and inject it into the sequencing batch reactor. After inoculation, control the sludge concentration in the sequencing batch reactor to be MLSS = 3900 mg / L. The sequencing batch reactor adopts an anaerobic → aerobic → anoxic operation mode. In the anaerobic stage of the sequencing batch reactor, inject oxytetracycline pharmaceutical wastewater through the feed pump for 10 minutes, and at the same time, turn on the mechanical stirrer in the sequencing batch reactor to anaerobically stir the oxytetracycline pharmaceutical wastewater for 2 hours. The stirring speed of the mechanical stirrer is 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor, the air compressor pump aerates aerobically through the pump pipe and the aeration head, with the dissolved oxygen being 3.0 mg / L - 3.4 mg / L and the aeration time being 5 hours. In the anoxic stage of the sequencing batch reactor, stir for 12 hours and then drain water through the drain valve. This stage operates for 18 cycles, with each cycle being 1 day. When the ammonia nitrogen limit requirement in the discharge standard for water pollution from fermentation pharmaceutical industry is met after draining water from the sequencing batch reactor, Phase I ends.
[0010] Phase II: The sequencing batch reactor operates in the sequence of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor, oxytetracycline pharmaceutical wastewater is injected through a feed pump for 10 minutes. Meanwhile, the mechanical stirrer is turned on for anaerobic stirring for 2 hours, and the rotational speed of the mechanical stirrer is 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor, the air compressor pumps aerobic air through the pump pipe and aeration head, and the nitrification time is adjusted from 6 hours to 4.5 hours. The anoxic stage of the sequencing batch reactor lasts for 12 hours. After the anoxic stage is completed, the sequencing batch reactor drains water through the drain valve. When the drained water of the sequencing batch reactor meets the requirement that the cumulative nitrite rate in the aerobic stage is stably higher than 80%, Phase II ends.
[0011] Phase III: The sequencing batch reactor operates in the sequence of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor, oxytetracycline pharmaceutical wastewater is injected through a feed pump for 10 minutes. Meanwhile, the mechanical stirrer is turned on for anaerobic stirring for 2 hours, and the rotational speed is 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor, the air compressor pumps aerobic air through the pump pipe and aeration head, and the nitrification time is adjusted from 6 hours to 4.5 hours. In the anoxic stage of the sequencing batch reactor, it lasts for 13 hours. After the anoxic stage is completed, the sequencing batch reactor drains water through the drain valve. The drained water in this stage meets the standards stably for a long time, and the treatment effect is good.
[0012] Phase IV: The sequencing batch reactor operates in the sequence of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor, oxytetracycline pharmaceutical wastewater is injected through a feed pump for 10 minutes. Meanwhile, the mechanical stirrer is turned on for anaerobic stirring for 3 hours, and the rotational speed is 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor, the air compressor pumps aerobic air through the pump pipe and aeration head, and the nitrification time does not exceed 4.5 hours. In the anoxic stage of the sequencing batch reactor, it lasts for 13 hours. After the anoxic stage is completed, the sequencing batch reactor drains water through the drain valve. The operation cycle of this stage is 37 cycles, and each cycle is 1 day. In the later stage of this stage, the total nitrogen in the effluent is stably maintained below 15 mg / L, meeting the discharge standards for fermentation pharmaceutical wastewater, and Phase IV ends.
[0013] As one of the preferred technical solutions of this application, the drained volume and the influent volume of the sequencing batch reactor are 50% of the total volume of the sewage in the sequencing batch reactor.
[0014] Compared with the prior art, the beneficial effects of this application are:
[0015] 1. In view of the characteristics of oxytetracycline biopharmaceutical wastewater, such as high organic matter content, high ammonia nitrogen, and low phosphorus (P) / carbon (C) ratio (P / C < 0.1), it is difficult for the traditional SBR method to deeply denitrify oxytetracycline biopharmaceutical wastewater without adding external carbon sources. The operation mode of "anaerobic → aerobic → anoxic" of the sequencing batch reactor adopted in this application realizes post-denitrification of SBR. Under long-term domestication, it can enrich glycogen-accumulating organisms (GAO). The glycogen-accumulating organisms convert volatile fatty acids (VFA) in water into glycogen through glycogenolysis in the anaerobic section, and use the remaining PHA and glycogen as carbon sources for denitrification in the anoxic section, enabling the effluent of the sequencing batch reactor to meet the limit requirements in GB21903-2008 "Discharge Standard of Water Pollutants for Fermentation Pharmaceutical Industry" and TN < 15 mg / L. The anaerobic section can store some biodegradable organic matter in the form of PHA in the cell body, reducing the aeration volume required for removing organic matter in the aerobic section. No external carbon source is required in the anoxic section, greatly reducing the operating cost.
[0016] 2. This application has the characteristics of fast startup, no external carbon source, good denitrification effect, simple operation and low cost. It is suitable for treating sewage and wastewater with a P / C ratio less than 0.1 and low phosphorus content, and is especially suitable for denitrification treatment of oxytetracycline biopharmaceutical wastewater. Brief Description of the Drawings
[0017] Figure 1 It is a schematic diagram of the device for enhancing the efficient denitrification of oxytetracycline pharmaceutical wastewater by integrating short-cut nitrification and post-denitrification described in this application.
[0018] Figure 2 It is the removal effect of COD and TN under long-term operation.
[0019] Figure 3 It is the removal effect of COD and nitrogen in a typical cycle.
[0020] In the figure: 1. Oxytetracycline wastewater inlet water tank; 2. Inlet water pump; 3. Inlet water pipe; 4. Sequencing batch reactor; 5. Mechanical stirrer; 6. pH value and dissolved oxygen measuring instrument; 7. Temperature control system; 8. Sampling port; 9. Drain valve; 10. Sludge discharge valve; 11. Gas flowmeter; 12. Air compressor pump; 13. Aeration head. Detailed Embodiments
[0021] The technical solutions described in this application will be further described and illustrated below in conjunction with the drawings and embodiments.
[0022] Example 1
[0023] See Figure 1, An integrated short-cut nitrification coupled with post-denitrification device for enhancing the efficient nitrogen removal of oxytetracycline pharmaceutical wastewater, which includes an oxytetracycline wastewater inlet water tank 1, a feed water pump 2, a feed water pipe 3, a sequencing batch reactor 4, a mechanical stirrer 5, a pH value and dissolved oxygen detector 6, a temperature control system 7, a sampling port 8, a drain valve 9, a sludge discharge valve 10, a gas flow meter 11, an air compressor pump 12, and an aeration head 13. Among them, the oxytetracycline wastewater inlet water tank 1 sends the oxytetracycline biopharmaceutical wastewater into the sequencing batch reactor 4 through the feed water pipe 3 under the action of the feed water pump 2.
[0024] The sequencing batch reactor 4 is provided with a mechanical stirrer 5. The mechanical stirrer 5 has a driving mechanism and a stirring mechanism. The stirring mechanism is located inside the sequencing batch reactor 4 and is driven by the driving mechanism to realize the stirring of the inside of the sequencing batch reactor 4, including the oxytetracycline biopharmaceutical wastewater.
[0025] The pH value and dissolved oxygen detector 6 has a probe extending into the sequencing batch reactor 4. The probe is connected to the pH value and dissolved oxygen detector 6 through an electrical signal to measure the pH value and dissolved oxygen of the liquid inside the sequencing batch reactor 4.
[0026] The temperature control system 7 can realize the heating and heat preservation of the liquid inside the sequencing batch reactor 4.
[0027] The sequencing batch reactor 4 is also respectively provided with a sampling port 8, a drain valve 9, and a sludge discharge valve 10, among which the sampling port 8, the drain valve 9, and the sludge discharge valve 10 are arranged in sequence from top to bottom.
[0028] An aeration head 13 is also arranged inside the sequencing batch reactor 4. The aeration head 13 is connected to the air compressor pump 12 through a pump pipe and a gas flow meter 11. The air compressor pump 12 can deliver the required gas to the aeration head 13, and the gas flow meter 11 can measure the gas pumped by the air compressor pump 12.
[0029] Example 2
[0030] A method for enhancing the efficient nitrogen removal of oxytetracycline pharmaceutical wastewater by integrated short-cut nitrification coupled with post-denitrification, which includes adopting a sequencing batch operation mode. The influent oxytetracycline pharmaceutical wastewater has a COD of 750 - 950 mg / L, NH4 + -N of 90 - 130 mg / L, and TN of 110 - 150 mg / L. The influent volume and effluent volume of the sequencing batch reactor 4 should not exceed 50% of the total volume of the sewage inside the sequencing batch reactor 4. The operation is carried out in the following steps:
[0031] Phase I: Take the aerobic activated sludge mixture from the AO reactor for actual oxytetracycline pharmaceutical wastewater treatment. After precipitation, decant the supernatant and inject it into the sequencing batch reactor 4. After inoculation, control the sludge concentration in the sequencing batch reactor 4 to be MLSS = 3900 mg / L. The sequencing batch reactor 4 operates in the mode of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor 4, inject oxytetracycline pharmaceutical wastewater through the feed pump 2 for 10 min, and at the same time, turn on the mechanical stirrer 5 of the sequencing batch reactor 4 to anaerobically stir the oxytetracycline pharmaceutical wastewater for 2 h. The stirring speed of the mechanical stirrer 5 is 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor 4, the air compressor pump 12 performs aerobic aeration through the pump pipe and the aeration head 13, with the dissolved oxygen being 3.0 mg / L - 3.4 mg / L and the aeration time being 5 h. In the anoxic stage of the sequencing batch reactor 4, after stirring for 12 hours by the mechanical stirrer 5, drain the water through the drain valve 9. This stage operates for 18 cycles, with each cycle being 1 day. When the drainage of the sequencing batch reactor 4 meets the ammonia nitrogen limit requirement in the water pollution discharge standard for fermentation pharmaceutical industry, Phase I ends.
[0032] Phase II: The sequencing batch reactor 4 operates in the mode of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor 4, inject oxytetracycline pharmaceutical wastewater through the feed pump 2 for 10 min, and at the same time, turn on the mechanical stirrer 5 to anaerobically stir for 2 h. The rotation speed of the mechanical stirrer 5 is 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor 4, the air compressor pump 12 performs aerobic aeration through the pump pipe and the aeration head 13, and the nitrification time is adjusted from 6 h to 4.5 h. The anoxic stage time of the sequencing batch reactor 4 is 12 h. After the anoxic stage is completed, the sequencing batch reactor 4 drains the water through the drain valve 9. When the drainage of the sequencing batch reactor 4 meets the requirement that the cumulative rate of nitrite in the aerobic stage is stably higher than 80%, Phase II ends.
[0033] Phase III: The sequencing batch reactor 4 operates in the mode of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor 4, inject oxytetracycline pharmaceutical wastewater through the feed pump 2 for 10 min, and at the same time, turn on the mechanical stirrer 5 to perform anaerobic stirring for 2 h, with the rotation speed being 70 rpm - 90 rpm. In the aerobic stage of the sequencing batch reactor 4, the air compressor pump 12 performs aerobic aeration through the pump pipe and the aeration head 13, and the nitrification time is adjusted from 6 h to 4.5 h. In the anoxic stage of the sequencing batch reactor 4, the time is 13 h. After the anoxic stage is completed, the sequencing batch reactor 4 drains the water through the drain valve 9. The drainage of this stage meets the standards for a long time and the treatment effect is good.
[0034] Phase IV: The sequencing batch reactor 4 operates in the sequence of anaerobic → aerobic → anoxic. In the anaerobic stage of the sequencing batch reactor 4, oxytetracycline pharmaceutical wastewater is injected through the feed water pump 2 for 10 minutes. Meanwhile, the mechanical stirrer 5 is turned on for anaerobic stirring for 3 hours at a rotational speed of 70 rpm to 90 rpm. In the aerobic stage of the sequencing batch reactor 4, the air compressor pump 12 performs aerobic aeration through the pump pipe and the aeration head 13, and the nitrification time does not exceed 4.5 hours. In the anoxic stage of the sequencing batch reactor 4, the time is 13 hours. After the anoxic stage is completed, the sequencing batch reactor 4 drains water through the drain valve 9. The operation cycle of this stage is 37 cycles, and each cycle is 1 day. The total nitrogen in the effluent in the later stage of this stage is stably maintained below 15 mg / L, meeting the discharge standard for fermentation pharmaceutical wastewater, and Phase IV ends.
[0035] The drained volume and the influent volume of the sequencing batch reactor 4 are 50% of the total volume of the sewage in the sequencing batch reactor 4.
[0036] Based on the above embodiments, refer to the appendix of this application Figure 2 and appendix Figure 3 , use the device described in Embodiment 1 and the method described in Embodiment 2 of this application to conduct a denitrification experiment on actual oxytetracycline pharmaceutical wastewater. The effective volume of the SBR reactor used is 6 L, and the drainage ratio is 50%. The pneumatic and operation results show that the denitrification effect is stable. After 34 hours of domestication, the start-up stage is completed and it operates stably for 120 days. When the influent COD, NH4 + -N, and TN concentrations are 786 mg / L, 106 mg / L, and 108 mg / L respectively, the effluent COD, NH4 + -N, and TN concentrations can reach 375 mg / L, 4 mg / L, and 11 mg / L respectively. Refer to Figure 3 , and the removal rates of ammonia nitrogen and total nitrogen can reach 96.2% and 89.8%.
[0037] Finally, although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method for enhancing efficient nitrogen removal from oxytetracycline pharmaceutical wastewater by integrated short-range nitrification coupled with post-denitrification, characterized in that: Including the use of sequencing batch operation mode, the COD of oxytetracycline pharmaceutical wastewater entering the biochemical system is 750~950mg / L, NH4 + -N is 90~130mg / L, TN is 110~150mg / L, the drainage ratio of the sequencing batch reactor (4) is 50%, and the following steps are used for operation: Phase I: Take the aerobic tank activated sludge mixed liquor from the AO reactor that actually treats oxytetracycline pharmaceutical wastewater, decant the supernatant after sedimentation, and inject it into the sequencing batch reactor (4). After inoculation, the sludge concentration in the sequencing batch reactor (4) is controlled to be MLSS=3900mg / L; the sequencing batch reactor (4) adopts an anaerobic→aerobic→anoxic operation mode, wherein the oxytetracycline pharmaceutical wastewater is injected into the sequencing batch reactor (4) through the water inlet pump (2) for 10 minutes during the anaerobic stage, and the mechanical agitator (5) of the sequencing batch reactor (4) is turned on at the same time, and the oxytetracycline pharmaceutical wastewater is anaerobically stirred for 2 hours by the mechanical agitator (5). , the stirring speed of the mechanical stirrer (5) is 70rpm~90rpm; in the aerobic stage of the sequencing batch reactor (4), the air compression pump (12) aerobically aerates through the pump pipe and the aeration head (13), the dissolved oxygen is 3.0mg / L~3.4mg / L, and the aeration time is 6h; in the anoxic stage of the sequencing batch reactor (4), the mechanical stirrer (5) is used to stir for 12 hours and then the water is drained through the drain valve (9). This stage runs for 18 cycles, each cycle is 1 day; when the drainage of the sequencing batch reactor (4) meets the ammonia nitrogen limit requirements in the water pollution discharge standard for fermentation pharmaceutical industries, stage I ends; Phase II: The sequencing batch reactor (4) adopts an anaerobic → aerobic → anoxic operation mode. In the anaerobic phase of the sequencing batch reactor (4), oxytetracycline pharmaceutical wastewater is injected through the water inlet pump (2) for 10 minutes. At the same time, the mechanical stirrer (5) is turned on for anaerobic stirring for 2 hours. The speed of the mechanical stirrer (5) is 70 rpm to 90 rpm. In the aerobic phase of the sequencing batch reactor (4), the air compression pump (12) is aerobically aerated through the pump pipe and the aeration head (13), and the nitrification time is adjusted from 6 hours to 4.5 hours. The anoxic phase time of the sequencing batch reactor (4) is 12 hours. After the anoxic phase is completed, the sequencing batch reactor (4) is drained through the drain valve (9). When the drainage of the sequencing batch reactor (4) satisfies the requirement that the nitrite accumulation rate in the aerobic phase is stably higher than 80%, Phase II ends. Phase III: The sequencing batch reactor (4) adopts the anaerobic → aerobic → anoxic operation mode. In the anaerobic phase of the sequencing batch reactor (4), oxytetracycline pharmaceutical wastewater is injected through the water inlet pump (2) for 10 minutes. At the same time, the mechanical stirrer (5) is turned on for anaerobic stirring for 2 hours at a speed of 70 rpm to 90 rpm. In the aerobic phase of the sequencing batch reactor (4), the air compression pump (12) is aerobically aerated through the pump pipe and the aeration head (13), and the nitrification time is adjusted from 6 hours to 4.5 hours. In the anoxic phase of the sequencing batch reactor (4), the time is 13 hours. After the anoxic phase is completed, the sequencing batch reactor (4) is drained through the drain valve (9). The drainage in this phase meets the standard stably for a long time, and the treatment effect is good. Phase IV: The sequencing batch reactor (4) adopts an anaerobic → aerobic → anoxic operation mode. In the anaerobic phase of the sequencing batch reactor (4), oxytetracycline pharmaceutical wastewater is injected through the water inlet pump (2) for 10 minutes. At the same time, the mechanical stirrer (5) is turned on for anaerobic stirring for 3 hours at a speed of 70 rpm to 90 rpm. In the aerobic phase of the sequencing batch reactor (4), the air compressor pump (12) aerobically aerates through the pump pipe and the aeration head (13), and the nitrification time does not exceed 4.5 hours. In the anoxic phase of the sequencing batch reactor (4), the time is 13 hours. After the anoxic phase is completed, the sequencing batch reactor (4) drains water through the drain valve (9). The operation cycle of this phase is 37 cycles, each cycle is 1 day. In the later stage of this phase, the total nitrogen in the effluent is stably maintained below 15 mg / L, which meets the discharge standard for fermentation pharmaceutical wastewater, and Phase IV ends.
2. The method for enhancing efficient denitrification of oxytetracycline pharmaceutical wastewater by integrated short-range nitrification coupled with post-denitrification according to claim 1 is characterized in that: The invention also includes an integrated short-range nitrification coupled post-denitrification device for enhancing the efficient denitrification of oxytetracycline pharmaceutical wastewater, the device comprising an oxytetracycline wastewater inlet water tank (1), an inlet pump (2), an inlet pipe (3), a sequencing batch reactor (4), a mechanical agitator (5), a pH value and dissolved oxygen meter (6), a temperature control system (7), a sampling port (8), a drain valve (9), a mud discharge valve (10), a gas flow meter (11), an air compression pump (12), and an aeration head (13), wherein the oxytetracycline wastewater inlet water tank (1) is connected to the feed port of the sequencing batch reactor (4) through the inlet pump (2) and the inlet pipe (3), and the sequencing batch reactor (4) is connected to the feed port of the sequencing batch reactor (4). ) is also provided with an aeration head (13) inside, the aeration head (13) is connected to an air compression pump (12) via a pump tube and a gas flow meter (11), the sequencing batch reactor (4) is also provided with a mechanical stirrer (5), the sequencing batch reactor (4) is provided with a probe of a pH value and dissolved oxygen meter (6), the pH value and dissolved oxygen meter is connected to the probe located in the sequencing batch reactor (4) via an electrical signal, the temperature control system (7) is used to achieve heating and heat preservation of the sequencing batch reactor (4); the sequencing batch reactor (4) is provided with a sampling port (8), a drainage valve (9), and a mud discharge valve (10) in order from top to bottom.
3. The method for enhancing efficient denitrification of oxytetracycline pharmaceutical wastewater by integrated short-range nitrification coupled with post-denitrification according to claim 2 is characterized in that: The drainage volume and water inlet volume of the sequencing batch reactor (4) are 50% of the total volume of sewage in the sequencing batch reactor (4).
Citation Information
Patent Citations
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