Ozone treatment method and system for controlling sludge to generate sulfide

Abstract

The invention relates to the technical field of sewage treatment, and particularly discloses an ozone treatment method and system for controlling sludge to generate sulfide. The method comprises the following steps: adding ozone with a set concentration into a sludge reactor, and changing the chemical equilibrium of sulfide in supernate through an oxidation reaction to reduce the concentration of the sulfide; monitoring the sulfide concentration of the supernate in the sludge reactor in real time by using a detection device, and generating the regulating quantity of ozone according to the monitoring data; and the adding concentration and flow of ozone are dynamically controlled based on the adjusting quantity. The system comprises an ozone supply unit, a sludge treatment unit, a concentration detection unit and a control module, all the units work cooperatively, and source control over hydrogen sulfide generation in sludge treatment is achieved. The method provided by the invention solves the problems of low efficiency and high cost of a traditional hydrogen sulfide control method, has the characteristics of high treatment efficiency, flexible operation and wide applicability, and can significantly reduce the harm of hydrogen sulfide to the environment and personnel health.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment technology, and in particular to an ozone treatment method and system for controlling sulfide production from sludge. The technology aims to effectively reduce harmful hydrogen sulfide and other sulfides produced during sewage treatment, thereby improving sewage treatment efficiency and reducing negative impacts on the environment and facilities. Background Art

[0002] With the continuous growth of urban sewage discharge, sewage treatment has become an important part of improving the ecological environment and improving the quality of urban living. In the sewage treatment process, a large amount of gas will be released in the sludge treatment stage, among which hydrogen sulfide (H2S) is a highly toxic, corrosive gas with a foul odor, and its control has attracted much attention. The generation of hydrogen sulfide mainly comes from the reduction of sulfur-containing compounds by sulfate-reducing bacteria (SRB) under anaerobic conditions. It may also be released in large quantities during processes such as sludge drying and concentration. Hydrogen sulfide not only poses a threat to the surrounding air quality, but also may shorten the service life of equipment by corroding concrete structures and metal materials in sewage treatment facilities. In addition, its high toxicity may cause serious harm to the health of sewage treatment plant workers and even cause safety accidents.

[0003] Traditional methods of controlling hydrogen sulfide mainly rely on end-of-pipe treatment, that is, treating released hydrogen sulfide through chemical absorption, physical adsorption and other means. However, such methods not only have limited treatment efficiency and complex operation, but also require high equipment investment and operating costs, which is particularly unfriendly to small and medium-sized sewage treatment plants. In addition, the generation of hydrogen sulfide is dynamic and uncertain, which further increases the difficulty of implementing end-of-pipe treatment technology.

[0004] In recent years, researchers have begun to try to reduce the generation of hydrogen sulfide through source control technology, such as reducing the release of hydrogen sulfide by adjusting the sulfide concentration or inhibiting the activity of sulfate-reducing bacteria. Although these methods have reduced the emission of hydrogen sulfide to a certain extent, they generally have problems such as insufficient control accuracy, high operating costs and limited applicability, making it difficult to meet the increasingly stringent environmental emission requirements of modern sewage treatment systems.

[0005] As an efficient oxidant, ozone has gradually shown its advantages in the field of sewage treatment. Ozone can not only quickly oxidize hydrogen sulfide, but also convert it into more stable low-valent sulfides (such as HS - 、S2 -), and can also reduce the generation of hydrogen sulfide from the source by inhibiting the activity of sulfate-reducing bacteria. However, most current studies focus on the role of ozone in terminal treatment, and exploration of source control is still insufficient. The present invention proposes a method for dynamically adding ozone in a sludge treatment reactor, which effectively changes the chemical balance of sulfides by real-time monitoring and adjusting the ozone concentration, realizes precise control of hydrogen sulfide generation, and provides an economical and efficient solution. Summary of the invention

[0006] The present invention relates to an ozone treatment method and system for controlling the generation of sulfide in sludge, which aims to change the sulfide chemical balance in the sludge treatment reactor through the oxidation effect of ozone, reduce the generation of hydrogen sulfide (H2S) and other sulfides from the source, and thus solve the problems of low removal efficiency and high cost in traditional hydrogen sulfide control methods, protect the environment and reduce the corrosion of facilities and health risks in sewage treatment plants.

[0007] The first embodiment of the present invention provides a method for controlling sludge to produce sulfide, which specifically comprises the following steps:

[0008] (1) introducing a specific amount of ozone into the sludge treatment reactor, using the oxidizing effect of ozone to change the chemical balance of sulfides in the sludge treatment reactor and reduce the sulfide concentration in the supernatant;

[0009] (2) Regularly monitor the sulfide concentration in the supernatant of the sludge treatment reactor;

[0010] (3) Adjust the amount of ozone added and the ozone concentration based on the monitoring results to ensure that the sulfide concentration remains within the target range.

[0011] Optionally, the source of ozone generated in the sewage treatment plant includes one or more of residual tail gas from the ozone contact tank, residual tail gas from the ozone and activated carbon filter tank, and ozone gas generated by the ozone generation system.

[0012] Optionally, the target sulfide concentration is in the range of 0.5 mg / g-SS to 100 mg / g-SS.

[0013] Optionally, monitoring the actual sulfide concentration in the supernatant of the sludge treatment reactor includes setting a target monitoring frequency for the sulfide concentration in the supernatant of the sludge treatment reactor; and monitoring the actual sulfide concentration in the supernatant of the sludge treatment reactor based on the target monitoring frequency.

[0014] Optionally, the sulfide comprises hydrogen sulfide, sodium sulfide, sulfite, ammonium sulfide or polysulfide.

[0015] Optionally, the chemical balance of sulfides in the sludge treatment reactor is changed by adding ozone and adjusting the ozone concentration to promote the conversion of hydrogen sulfide (H2S) and other sulfides to HS - and shift in chemical equilibrium.

[0016] Optionally, based on the target adjustment amount, the ozone concentration in the sludge treatment reactor is adjusted, including real-time monitoring of the ozone concentration entering the sludge treatment reactor; according to the difference between the monitoring data and the target concentration, the input amount of ozone is dynamically adjusted to ensure that the ozone concentration in the reactor is always maintained at the required level.

[0017] Optionally, the ozone concentration value in the sludge treatment reactor is adjusted based on the target adjustment amount, including monitoring the actual ozone concentration value introduced into the sludge treatment reactor; and adjusting the ozone introduction amount into the sludge treatment reactor according to the actual ozone concentration value and the target adjustment amount to adjust the ozone concentration value in the sludge treatment reactor.

[0018] The second embodiment of the present application provides a system for controlling sludge to produce sulfide, comprising the following components:

[0019] (1) Ozone generator: The ozone generator is used to generate ozone gas and transport it to the sludge treatment reactor through a pipeline. The device can adjust the amount of ozone generated according to the sewage treatment needs and ensure the stability of ozone supply.

[0020] (2) Sludge treatment reactor: The sludge treatment reactor is connected to the ozone generator through a pipeline, and ozone gas is injected into the sludge treatment reactor through the pipeline. Ozone gas participates in the oxidation reaction in the reactor, promotes the conversion of sulfide in the supernatant, reduces the concentration of sulfide, and reduces the generation of hydrogen sulfide and other sulfides from the source.

[0021] (3) Sulfide concentration sensor: The sulfide concentration sensor is used to monitor the sulfide concentration of the supernatant in the sludge treatment reactor in real time. The sensor can accurately detect the changes in sulfide in the reactor and provide real-time data for system adjustment.

[0022] (4) Control unit: The control unit receives data from the sulfide concentration sensor and calculates the required ozone adjustment amount based on the difference between the actual sulfide concentration and the target concentration. The control unit adjusts the ozone output of the ozone generator based on the calculation result, thereby accurately controlling the ozone concentration in the sludge disposal reactor to ensure that the predetermined sulfide removal effect is achieved.

[0023] Optionally, the sulfide concentration sensor is a sensor capable of detecting the sulfide concentration in the sludge disposal reactor in real time.

[0024] Optionally, a gas flow meter and an ozone concentration monitor are provided between the sludge treatment reactor and the ozone generator to monitor the input amount and concentration of ozone in real time, and adjust the ozone input amount according to the monitoring data to ensure that the ozone concentration in the reactor is always maintained within the set range.

[0025] The ozone treatment method and system of the present invention overcome the deficiencies in the prior art through the following advantages:

[0026] 1. Efficiently reduce the generation of hydrogen sulfide: Through the oxidation effect of ozone, it can effectively promote the conversion of hydrogen sulfide and other sulfides into a stable low-valent state, reduce the generation of hydrogen sulfide, and reduce its harm to the environment and human health.

[0027] 2. Reduce the cost of ozone use: The present invention adopts multiple sources to obtain ozone (such as residual tail gas from ozone contact tank, residual tail gas from ozone-activated carbon filter, ozone generation system, etc.), effectively reducing the cost of ozone acquisition and ensuring a stable supply of ozone.

[0028] 3. Accurately control ozone concentration: By real-time monitoring of sulfide concentration, the amount and concentration of ozone can be dynamically adjusted according to the data to ensure that the sulfide concentration is always maintained within the target range, avoid ozone waste, and reduce the production of by-products.

[0029] 4. Improve system adaptability and stability: This method and system are suitable for the working conditions of different sewage treatment plants, and can flexibly adjust the ozone concentration according to actual needs, improve the processing capacity, and ensure the long-term stable operation of the system.

[0030] 5. Environmental protection and sustainability: Reducing hydrogen sulfide emissions, reducing ozone waste, and improving resource utilization make this technology have higher environmental benefits and meet the requirements of green and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A flow chart of a method for controlling sulfide production from sludge provided in an embodiment of the present invention;

[0032] Figure 2 A schematic diagram of changes in pH, oxidation-reduction potential (ORP), chemical oxygen demand (COD) and sludge mixed liquor suspended solids (MLSS) in sludge supernatant under the action of ozone concentration of 1 mg / g-SS provided in an embodiment of the present invention;

[0033] Figure 3 A schematic diagram of the change in sulfide concentration in the sludge supernatant under the action of ozone concentration of 1 mg / g-SS provided in this embodiment;

[0034] Figure 4A schematic diagram of the changes in sulfide, COD, pH and ORP in the sludge supernatant under the action of ozone concentration of 5 mg / g-SS provided in an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the changes in sulfide, COD, pH and ORP in sludge supernatant under the action of ozone concentration of 10 mg / g-SS provided in an embodiment of the present invention;

[0036] Figure 6 A schematic flow chart of a method for controlling sulfide production from sludge provided in an embodiment of the present invention;

[0037] Figure 7 A block diagram of a system for controlling sulfide production from sludge provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The specific implementation modes of the present invention are described in conjunction with the accompanying drawings, which are only interpreted as examples and should not be regarded as limiting the scope of protection of the invention.

[0039] In the sludge treatment process of sewage treatment plants, hydrogen sulfide (H2S), as the main form of sulfide, poses a significant threat to environmental quality and facility safety. The generation of hydrogen sulfide mainly comes from anaerobic degradation reactions, especially under the action of sulfate-reducing bacteria (SRB), hydrogen sulfide is generated through sulfate reduction reactions. This embodiment proposes a technical method for regulating the chemical balance of sulfides in a sludge reactor using the oxidation effect of ozone, thereby reducing the generation of hydrogen sulfide from the source.

[0040] like Figure 1 As shown, the specific operation steps of this embodiment are as follows:

[0041] Step S101: A certain amount of ozone is introduced into the sludge treatment reactor. Ozone reacts with sulfide in the sludge through strong oxidation, changes the chemical balance of sulfide, and reduces the sulfide concentration in the reactor supernatant.

[0042] Step S102: regularly sampling and monitoring the sulfide concentration in the supernatant of the sludge treatment reactor, and ensuring that the reaction process is in a controlled state by continuously tracking the change in sulfide concentration.

[0043] Step S103: According to the monitoring results, the flow rate and concentration of ozone are adjusted to ensure that the sulfide concentration in the reactor is maintained within the target range. Specifically, when it is detected that the sulfide concentration exceeds the target range, the ozone dosage is automatically adjusted to restore the sulfide level in the reactor.

[0044] Through the above method, effective control of sulfide in sludge can be achieved, excessive generation of hydrogen sulfide can be avoided, and the safety and treatment efficiency of the sludge treatment reactor can be improved.

[0045] Embodiment 1:

[0046] By adding ozone (1 mg / g-SS) to the sludge treatment reactor, after 6 days of operation, the pH and ORP values ​​of the ozone group and the control group showed similar trends ( Figure 2 a, 2b). Under the operating conditions without sludge discharge, the chemical oxygen demand (COD) of the supernatant in the ozone group increased from 5504 mg / L to 6241 mg / L, while that in the control group increased from 5442 mg / L to 6848 mg / L. The results show that the addition of ozone inhibited the accumulation of COD to a certain extent ( Figure 2 c). During operation, the fluctuation of MLSS concentration indicated that the addition of ozone did not significantly affect the stability of sludge concentration ( Figure 2 d). The MLSS of the ozone group varied within a narrow range, remaining between 4.9-5.3 g / L, while the MLSS of the control group fluctuated more, reaching 4.8-5.6 g / L. This indicates that the addition of ozone can maintain the stability of the sludge system while achieving sulfide removal.

[0047] In addition, the change in sulfide concentration in the supernatant was more significant. The sulfide concentration in the ozone group decreased from the initial 74 mg / L to 10 mg / L ( Figure 3 ), while the control group only dropped from 68 mg / L to 33 mg / L. This shows that an ozone concentration of 1 mg / g-SS can significantly reduce the concentration of sulfide in the supernatant, thereby effectively controlling the generation of hydrogen sulfide and reducing the potential threat to the surrounding environment and facilities.

[0048] The above experimental data show that the addition of ozone not only effectively reduces the sulfide concentration in the supernatant, but also significantly improves the operating conditions of the sludge treatment system. This method provides reliable technical support for controlling the generation of hydrogen sulfide.

[0049] Embodiment 2:

[0050] In the sludge treatment process, ozone was added to the sludge treatment reactor according to the method of the present invention, and the ozone concentration was 5 mg / g-SS. After running for 3 days, the sulfide concentration, COD, pH, and ORP of the supernatant were monitored, and the following results were obtained:

[0051] like Figure 4 As shown in a, the sulfide concentration in the supernatant of the ozone group decreased from the initial 76 mg / L to 14 mg / L, while the sulfide concentration in the control group decreased from 75 mg / L to 55 mg / L. This result shows that the addition of ozone can significantly remove sulfide in the supernatant and effectively reduce the generation of hydrogen sulfide.

[0052] like Figure 4As shown in Figure b, the COD value of the supernatant in the ozone group decreased from 5482 mg / L to 5055 mg / L, while the COD value of the control group increased from 5347 mg / L to 5521 mg / L. This result shows that ozone addition can significantly reduce the concentration of some organic matter in the supernatant and inhibit the accumulation of COD.

[0053] like Figure 4 As shown in Figure c, the pH value of the supernatant in the ozone group increased from 5.45 to 5.59, while the pH value in the control group decreased from 5.55 to 5.30. This result shows that the addition of ozone has a positive effect on the acid-base balance of the reactor system and helps to maintain the stable operation of the system.

[0054] like Figure 4 As shown in Figure d, the ORP value of the supernatant in the ozone group decreased from 89 mV to 82 mV, while the ORP value of the control group increased from 84 mV to 98 mV. This result shows that the addition of ozone can reduce the redox potential of the supernatant through oxidation reaction and improve the chemical environment in the reactor.

[0055] It can be seen from the above results that at an ozone addition concentration of 5 mg / g-SS, the present invention can significantly reduce the sulfide concentration of the supernatant in the sludge treatment reactor, effectively control the accumulation trend of COD, improve the pH value change of the system, and adjust the ORP level, thereby achieving efficient control of sulfide generation. The method of the present invention is suitable for sulfide control in the sludge treatment process, especially under conditions with strict requirements for hydrogen sulfide emission, and has broad application prospects.

[0056] Embodiment 3:

[0057] Ozone was added to the sludge treatment reactor according to the method of the present invention, and the ozone addition concentration was 10 mg / g-SS. After the device was operated for 3 days, the sulfide concentration, COD, pH, and ORP of the supernatant were monitored, and the specific results were as follows:

[0058] like Figure 5 As shown in a, the sulfide concentration in the supernatant of the ozone group decreased from 85 mg / L to 12 mg / L, while the sulfide concentration in the control group only decreased from 88 mg / L to 56 mg / L. The results show that the addition of ozone at a concentration of 10 mg / g-SS can significantly reduce the sulfide concentration in the supernatant and effectively reduce the generation of hydrogen sulfide.

[0059] like Figure 5 As shown in Figure b, the COD value of the supernatant in the ozone group decreased from 5516 mg / L to 5337 mg / L, while the COD value of the control group increased from 5498 mg / L to 6281 mg / L. This result shows that ozone addition can effectively reduce the organic matter content in the supernatant and inhibit the accumulation trend of COD.

[0060] like Figure 5 As shown in Figure c, the pH value of the supernatant in the ozone group decreased from 6.17 to 5.89, while the pH value in the control group decreased from 6.21 to 5.10. The results show that the addition of ozone can alleviate the downward trend of pH, maintain the acid-base balance of the system, and avoid the excessive formation of an acidic environment.

[0061] like Figure 5 As shown in Figure d, the ORP value of the supernatant in the ozone group increased from 49mV to 65mV, while the ORP value in the control group increased from 46mV to 108mV. This result shows that the addition of ozone can significantly adjust the redox environment and avoid the adverse effects that may be caused by excessively high ORP.

[0062] It can be seen from the above results that at an ozone addition concentration of 10 mg / g-SS, the method of the present invention can effectively reduce the sulfide concentration in the supernatant, reduce the accumulation of COD, adjust the pH change trend and optimize the ORP level, thereby significantly improving the operating conditions of the sludge treatment reactor. This method is suitable for sludge treatment processes that require efficient control of sulfide generation and has broad industrial application prospects.

[0063] Embodiment 4:

[0064] like Figure 6 As shown, this embodiment provides a method for controlling sulfide generation in sludge treatment, which is based on the coordinated operation of the sludge treatment device and related components, and specifically includes the following steps:

[0065] (1) Ozone addition: ozone gas of a set concentration is introduced into the sludge treatment device through the ozone tail gas of the sewage treatment plant or the ozone generator. The ozone concentration is detected in real time by the ozone concentration detector, and the gas flow meter is used to control the amount of ozone added to ensure that the amount of ozone entering the sludge treatment device meets the preset treatment requirements.

[0066] (2) Sludge treatment: In a closed sludge treatment device, ozone reacts with sulfides in the sludge to oxidize, thereby changing the chemical balance of sulfides in the sludge supernatant, reducing the concentration of sulfides and the generation of hydrogen sulfide. The device is equipped with a stirring system to enhance the mixing efficiency of ozone and sludge.

[0067] (3) Sulfide concentration monitoring: Use a hydrogen sulfide concentration detector to monitor the sulfide and hydrogen sulfide concentrations in the sludge treatment device in real time, and take samples regularly through the sampling ports installed on the device to record the changes in sulfide concentration.

[0068] (4) Dynamic adjustment: According to the results of the hydrogen sulfide concentration detector and sampling analysis, the ozone output or concentration of the ozone generator is adjusted to optimize the treatment process. The ozone injection rate is accurately controlled by the gas flow meter to ensure that the sulfide concentration is maintained within the target range.

[0069] (5) Exhaust gas collection: The exhaust gas generated during operation enters the gas collection bag through the exhaust port on the top of the sludge treatment device for centralized collection and treatment, avoiding the impact of direct exhaust gas discharge on the environment.

[0070] This method effectively controls the generation of sulfide in sludge treatment by dynamically adjusting the ozone concentration and flow rate, combined with real-time monitoring of sulfide and hydrogen sulfide concentrations. This method is suitable for sludge treatment facilities of various sizes, is easy to operate, and has significant environmental benefits.

[0071] Example 5

[0072] like Figure 7 As shown, this embodiment provides a system 700 for controlling the generation of sludge sulfide. The system includes: an ozone supply unit 710, a sludge treatment unit 720, a concentration detection unit 730 and a control module 740.

[0073] The ozone supply unit is used to generate and output ozone gas of a set concentration, and transport the ozone through a pipeline to the sludge treatment unit 720. The output concentration and flow of ozone can be dynamically adjusted according to the system operation requirements.

[0074] The sludge treatment unit is a closed reaction device for receiving ozone provided by the ozone supply unit 710. Through the oxidation reaction between ozone and sulfide in the sludge, the sludge treatment unit can effectively reduce the sulfide concentration in the supernatant, thereby reducing the generation of hydrogen sulfide.

[0075] The concentration detection unit is connected to the sludge treatment unit 720 and is used to monitor the sulfide concentration and hydrogen sulfide concentration of the supernatant in the sludge treatment unit in real time, and transmit the monitoring data to the control module 740 .

[0076] The control module receives the monitoring data transmitted by the concentration detection unit 730, compares it with the preset target sulfide concentration, and generates a control signal according to the comparison result, which is used to adjust the output parameters of the ozone supply unit 710, thereby dynamically adjusting the ozone concentration and flow entering the sludge treatment unit.

[0077] The system obtains the sulfide concentration data in the sludge treatment unit 720 in real time through the concentration detection unit 730, and adjusts the output of the ozone supply unit 710 through the control module 740 to ensure that the sulfide concentration in the sludge treatment unit 720 is maintained within the target range. The system adopts a sub-unit design, which is easy to operate and reliable in operation. It can be applied to sludge treatment processes of different scales and has significant environmental benefits and application value.

[0078] The above is only one of the specific embodiments of the present invention, which is used to explain the process principle and process of the present invention. Any equivalent modification, substitution or deformation made by any technician in this field based on the prior art without departing from the core idea of ​​the present invention should be deemed to be included in the protection scope of the present invention. These modifications, whether they are adjustments to the system composition, process flow or specific parameters, do not affect the actual effect of the present invention and should be included in the patent protection of the present invention.

Claims

1. An ozone treatment method for controlling sulfide production in sludge, characterized in that: The following steps are involved: (1) introducing a specific amount of ozone into the sludge treatment reactor, using the oxidizing effect of ozone to change the chemical balance of sulfides in the sludge treatment reactor and reduce the sulfide concentration in the supernatant; (2) Regularly monitor the sulfide concentration in the supernatant of the sludge treatment reactor; (3) Adjust the amount of ozone added and the ozone concentration based on the monitoring results to ensure that the sulfide concentration remains within the target range.

2. The method according to claim 1, characterized in that The source of ozone is one or more of the following treatment units in a sewage treatment plant: (1) Residual tail gas from ozone contact pool; (2) Residual tail gas from ozone-activated carbon filter; (3) Ozone gas generated by the ozone generation system.

3. The method according to claim 1, characterized in that The ozone concentration is adjusted in the range of 0.5 mg / g-SS to 100 mg / g-SS.

4. The method according to claim 1, characterized in that The sulfide concentration monitoring frequency is once a day or once a week, and the monitored sulfide concentration is converted into hydrogen sulfide concentration for quantification.

5. The method according to claim 1, characterized in that The monitored sulfides include hydrogen sulfide, sodium sulfide, sulfite, ammonium sulfide or polysulfide.

6. The method according to claim 1, characterized in that The chemical balance of sulfides in the sludge treatment reactor is changed by adding ozone and adjusting the ozone concentration to promote the conversion of hydrogen sulfide (H2S) and other sulfides to HS - and S2 - shift in chemical equilibrium.

7. The method according to claim 1, characterized in that The steps to adjust the ozone concentration include: (1) Monitor the actual ozone concentration in the sludge treatment reactor; (2) Adjust the ozone input according to monitoring data and target concentration.

8. A system for controlling sulfide production from sludge, characterized in that: The system comprises: (1) an ozone generator for generating ozone gas; (2) a sludge treatment reactor, wherein the reactor is connected to an ozone generator through a pipeline, and ozone gas is injected into the treatment reactor through the pipeline to promote the oxidation reaction of sulfide in the supernatant and reduce the concentration of sulfide; (3) a sulfide concentration sensor for real-time monitoring of the sulfide concentration of the supernatant in the sludge treatment reactor; (4) A control unit, which calculates a required ozone adjustment amount based on a difference between the monitored sulfide concentration and a target concentration, and adjusts the ozone output of the ozone generator to achieve a predetermined sulfide removal effect.

9. The system according to claim 8, characterized in that The sulfide concentration sensor is a sensor capable of detecting the sulfide concentration in the sludge disposal reactor in real time.

10. The system according to claim 8, characterized in that A gas flow meter and an ozone concentration monitor are provided between the sludge treatment reactor and the ozone generating device, which are used to monitor the input amount and concentration of ozone in real time and adjust the input amount of ozone according to the monitoring data.

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