Industrial park sewage treatment system

Abstract

The embodiment of the utility model provides an industrial park sewage treatment system which comprises a primary sedimentation tank, an adjusting tank, a hydrolysis acidification tank, an improved A / O tank, an MBR membrane tank, a first Fenton reaction tank, an efficient sedimentation tank, a denitrification deep-bed filter tank, an ion exchange system, a water production tank and a contact disinfection tank which are communicated in sequence, so that sewage is treated for multiple times; the industrial wastewater treatment system can greatly improve the degradation degree and biodegradability of industrial wastewater, can deeply and effectively treat different types of high-molecular, refractory and poor-biodegradability pollutants in industrial park sewage, has the characteristics of comprehensiveness, high efficiency and stability, can meet the treatment requirements of different industrial wastewater, and has adaptability and flexibility.

Description

Technical Field

[0001] The present application relates to the technical field of sewage treatment, and in particular to a sewage treatment system for an industrial park. Background Art

[0002] With the rapid development of urbanization and industry, the construction of industrial parks in various places has also grown rapidly. In the relevant technology, each industrial park uses traditional urban sewage treatment process to treat sewage.

[0003] However, due to the large number of enterprises in the park, the composition of industrial wastewater is complex, the nitrogen and phosphorus concentrations are high, the sewage discharge volume and the water quality fluctuate greatly, and its biodegradability is difficult to guarantee. As a result, a certain amount of difficult-to-degrade organic pollutants still remain in the treated sewage, making it difficult to meet the existing effluent discharge standards. Utility Model Content

[0004] The embodiment of the present application provides an industrial park sewage treatment system to solve the problem that the industrial park sewage treated by the current urban sewage treatment process is difficult to meet the existing effluent discharge standards.

[0005] The embodiment of the present application provides an industrial park sewage treatment system, including a primary sedimentation tank, a regulating tank, a hydrolysis acidification tank, an improved A / O tank, an MBR membrane tank, a first Fenton reaction tank, a high-efficiency sedimentation tank, a denitrification deep bed filter, an ion exchange system, a water production tank and a contact disinfection tank connected in sequence;

[0006] Specifically, the water outlet of the primary sedimentation tank is connected to the water inlet of the regulating tank, the water outlet of the regulating tank is connected to the water inlet of the hydrolysis acidification tank, the water outlet of the hydrolysis acidification tank is connected to the water inlet of the improved A / O tank, the water outlet of the improved A / O tank is connected to the water inlet of the MBR membrane tank, the water outlet of the MBR membrane tank is connected to the water inlet of the first Fenton reaction tank, the water outlet of the first Fenton reaction tank is connected to the water inlet of the high-efficiency sedimentation tank, the water outlet of the high-efficiency sedimentation tank is connected to the water inlet of the denitrification deep bed filter, the water outlet of the denitrification deep bed filter is connected to the water inlet of the ion exchange system, the water outlet of the ion exchange system is connected to the water inlet of the water production tank, and the water outlet of the water production tank is connected to the water inlet of the contact disinfection tank;

[0007] Among them, coarse grids and fine grids for removing particulate impurities in sewage are arranged in sequence along the flow direction of sewage outside the primary sedimentation tank;

[0008] The regulating tank is provided with a regulating part for regulating the quality and quantity of sewage;

[0009] The hydrolysis acidification tank is provided with microorganisms for decomposing organic matter to decompose organic matter in sewage;

[0010] Improved A / O tanks are used to purify sewage;

[0011] A membrane bioreactor for sewage filtration is provided in the MBR membrane pool;

[0012] The first Fenton reaction tank and high-efficiency sedimentation tank are used to remove hypophosphite from sewage;

[0013] Denitrification deep bed filter is used to treat ammonia ions in sewage;

[0014] Ion exchange systems are used to remove metal ions from wastewater;

[0015] The water production pool is used to collect and store clean water produced after sewage treatment;

[0016] The contact disinfection tank is provided with a disinfectant for disinfecting the clean water.

[0017] In a feasible implementation, the improved A / O tank includes a pre-anoxic tank, an anaerobic tank, an anoxic tank and an aerobic tank connected in sequence;

[0018] The pre-anoxic tank, anaerobic tank, anoxic tank and aerobic tank use microorganisms to treat organic matter in sewage under different oxygen concentrations.

[0019] In a feasible implementation, a second Fenton reaction tank and an air flotation tank are sequentially arranged between the regulating tank and the hydrolysis acidification tank, and the second Fenton reaction tank is used to decompose the difficult-to-degrade organic matter into easily degradable organic matter;

[0020] The flotation tank is used to remove suspended matter produced by the second Fenton reaction tank and floating oil in the sewage.

[0021] In a feasible implementation, the industrial park sewage treatment system also includes a sludge thickening tank. The primary sedimentation tank, flotation tank, hydrolysis acidification tank, MBR membrane tank and high-efficiency sedimentation tank are all connected to the sludge thickening tank. The sludge thickening tank is used to concentrate the sludge generated during the sewage purification process.

[0022] In a feasible implementation, the industrial park sewage treatment system further includes a conditioning tank and a sludge dewatering machine, the sludge concentration tank is connected to the conditioning tank, and the conditioning tank is connected to the sludge dewatering machine;

[0023] The conditioning tank is used to condition the concentrated sludge, and the sludge dewatering machine is used to dewater the conditioned sludge.

[0024] In a feasible implementation, a first submersible mixer is provided in the primary sedimentation tank.

[0025] In a feasible implementation, a second submersible mixer is provided in the regulating tank;

[0026] In a feasible implementation, a third submersible mixer is provided in the flotation tank.

[0027] In a feasible implementation, the industrial park sewage treatment system further includes an aeration device, which includes an aeration fan, an aerator, and an aeration pipeline;

[0028] The aerator is connected to the aeration fan through an aeration pipeline, and the aerator is arranged in the improved A / O tank and / or the first Fenton reaction tank.

[0029] In a feasible implementation, the industrial park sewage treatment system also includes an accident pool, which is connected to the primary sedimentation tank and the regulating tank respectively.

[0030] The embodiment of the present application provides an industrial park sewage treatment system, including a primary sedimentation tank, a regulating tank, a hydrolysis acidification tank, a modified A / O tank, an MBR membrane tank, a first Fenton reaction tank, a high-efficiency sedimentation tank, a denitrification deep bed filter, an ion exchange system, a water production tank and a contact disinfection tank that are connected in sequence, so that the sewage is treated multiple times, which can greatly improve the degradability and biodegradability of industrial wastewater, and deeply and effectively treat different types of high-molecular, difficult-to-degrade, and poorly biodegradable pollutants in industrial park sewage. It has the characteristics of comprehensiveness, efficiency, and stability, can meet the treatment needs of different industrial wastewaters, and has adaptability and flexibility. Among them, coarse screens and fine screens for removing particulate impurities in sewage are arranged in sequence along the flow direction of sewage on the outside of the primary sedimentation tank; a regulating part for regulating sewage quality and water quantity is arranged in the regulating tank; microorganisms for decomposing organic matter are arranged in the hydrolysis acidification tank to decompose organic matter in sewage; the improved A / O tank is used to purify sewage; a membrane bioreactor for sewage filtration is arranged in the MBR membrane tank; the first Fenton reaction tank and the high-efficiency sedimentation tank are used to remove hypophosphite in sewage; the denitrification deep bed filter is used to treat ammonia ions in sewage; the ion exchange system is used to remove metal ions in sewage; the water production tank is used to collect and store clean water produced after sewage treatment; the contact disinfection tank is provided with a disinfectant for disinfecting clean water.

[0031] In addition, the industrial park sewage treatment system can effectively improve the wastewater treatment effect, reduce operating costs, protect the environment, and achieve sustainable development. The sludge generated during the wastewater treatment process is effectively treated, which can reduce environmental pollution, and is conducive to the healthy and sustainable development of the ecological environment, providing solutions and practical basis for the treatment of industrial park sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present application and do not constitute improper limitations on the present invention.

[0033] In the attached picture:

[0034] Figure 1 It is a schematic diagram of an industrial park sewage treatment system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0036] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0037] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] With the rapid development of urbanization and industry, the construction of industrial parks in various places has also grown rapidly. In the relevant technology, each industrial park uses traditional urban sewage treatment process to treat sewage.

[0039] However, due to the large number of enterprises in the park, the composition of industrial wastewater is complex, the nitrogen and phosphorus concentrations are high, the sewage discharge volume and the water quality fluctuate greatly, and its biodegradability is difficult to guarantee. As a result, a certain amount of difficult-to-degrade organic pollutants still remain in the treated sewage, making it difficult to meet the existing effluent discharge standards.

[0040] In order to solve the problem that industrial park sewage treated by the current urban sewage treatment process is difficult to meet the existing effluent discharge standards, the embodiment of the present application provides an industrial park sewage treatment system. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0041] Figure 1It is a schematic diagram of an industrial park sewage treatment system provided in one embodiment of the present application.

[0042] Reference Figure 1 As shown, an embodiment of the present application provides an industrial park sewage treatment system, including a primary sedimentation tank, a regulating tank, a hydrolysis acidification tank, a modified A / O tank, an MBR membrane tank, a first Fenton reaction tank, a high-efficiency sedimentation tank, a denitrification deep bed filter, an ion exchange system, a water production tank and a contact disinfection tank, which are sequentially connected by pipelines.

[0043] Among them, the outlet of the primary sedimentation tank is connected with the water inlet of the regulating tank through a pipeline, the outlet of the regulating tank is connected with the water inlet of the hydrolysis acidification tank through a pipeline, the outlet of the hydrolysis acidification tank is connected with the water inlet of the improved A / O tank through a pipeline, the outlet of the improved A / O tank is connected with the water inlet of the MBR membrane tank through a pipeline, the outlet of the MBR membrane tank is connected with the water inlet of the first Fenton reaction tank through a pipeline, the outlet of the first Fenton reaction tank is connected with the water inlet of the high-efficiency sedimentation tank through a pipeline, the outlet of the high-efficiency sedimentation tank is connected with the water inlet of the denitrification deep bed filter through a pipeline, the outlet of the denitrification deep bed filter is connected with the water inlet of the ion exchange system through a pipeline, the outlet of the ion exchange system is connected with the water inlet of the water production tank through a pipeline, and the outlet of the water production tank is connected with the water inlet of the contact disinfection tank through a pipeline.

[0044] Coarse screens and fine screens for removing particulate impurities in sewage are arranged in sequence along the flow direction of sewage on the outside of the primary sedimentation tank. After the sewage enters the primary sedimentation tank, the primary sedimentation tank can remove suspended pollutants in the water body and precipitate the sewage in the primary sedimentation tank, thereby reducing the sewage treatment load of subsequent processes. The hydraulic retention time of the primary sedimentation tank is 0.89h. Under normal working conditions, the sewage after primary sedimentation enters the regulating tank for equalization, and the retention time in the regulating tank is 6.96h. A regulating part for adjusting the water quality and water quantity of sewage is provided in the regulating tank. It can be understood that the regulating part can adjust the sewage to an appropriate flow rate to ensure the stable operation of the subsequent sewage treatment structure.

[0045] In addition, in some examples, a first submerged mixer is provided in the primary sedimentation tank to flocculate fine solids into larger particles through stirring, thereby enhancing solid-liquid separation.

[0046] The sewage flowing out of the regulating tank is discharged to the hydrolysis acidification tank through a pipeline for further treatment. For example, the sewage stays in the hydrolysis acidification tank for 8.9 hours. The hydrolysis acidification tank is equipped with microorganisms for decomposing organic matter. High-molecular organic matter that is difficult to degrade is hydrolyzed into small-molecule organic matter that is easily degradable, which improves the biodegradability of sewage, is conducive to the stable operation of subsequent sewage treatment structures, and improves the sewage treatment effect. In some examples, a second submersible mixer is provided in the regulating tank to fully stir the industrial wastewater to achieve the purpose of balancing water quality and water quantity.

[0047] Then, the treated sewage flowing out of the hydrolysis acidification tank is discharged to the improved A / O tank through a pipeline for further treatment. Exemplarily, the improved A / O tank includes a pre-anoxic tank, an anaerobic tank, an anoxic tank and an aerobic tank connected in sequence. Among them, the pre-anoxic tank, the anaerobic tank, the anoxic tank and the aerobic tank respectively use microorganisms to treat organic matter in sewage at different oxygen concentrations to achieve the separation of sludge and sewage. In the pre-anoxic tank, the organic matter in the sewage will be degraded by facultative anaerobic microorganisms and biofilms, and ammonia nitrogen will be converted into nitrite and nitrate. This process not only helps to reduce the content of harmful substances in sewage, but also can provide necessary nutrients for subsequent aerobic tanks or anaerobic tanks. The anaerobic tank uses the activity of anaerobic microorganisms to treat organic matter in sewage. It does not perform aeration and has a high concentration of pollutants. In addition, because the anaerobic microorganisms inside it consume dissolved oxygen when decomposing organic matter, there is almost no dissolved oxygen in the water body, which is suitable for the activity of anaerobic microorganisms to treat pollutants in the water.

[0048] Anoxic tanks use anaerobic microorganisms and biofilms to degrade organic matter in wastewater in an environment without dissolved oxygen. Anoxic tanks are usually equipped with aeration devices to control dissolved oxygen between 0.3-0.8 mg / l.

[0049] Then, the sewage treated in the improved A / O tank is discharged to the MBR membrane tank for further treatment. Among them, the MBR membrane tank is provided with a membrane bioreactor for sewage filtration. The MBR membrane in the reactor can intercept microorganisms, prolong the sludge age, and remove biodegradable organic pollutants in the water. Then, the membrane assembly is used to forcibly intercept the activated sludge and most of the suspended matter in the bioreactor to achieve solid-liquid separation of purified water and activated sludge. In addition, the industrial park sewage treatment system also includes an aeration device, which includes an aeration fan, an aerator and an aeration pipe; the aerator is connected to the aeration fan through an aeration pipe, and the aerator is arranged in the improved A / O tank and / or the first Fenton reaction tank to adjust the oxygen content in the A / O tank and / or the first Fenton reaction tank.

[0050] Then, the water treated by the MBR membrane pool is discharged to the first Fenton reaction tank and the high-efficiency sedimentation tank in turn through the pipeline. By adding strong oxidants such as Fenton reagent, it can not only remove the difficult-to-degrade hypophosphite in the wastewater, but also achieve the removal of total phosphorus. Exemplarily, 50% sulfuric acid, 30% ferrous sulfate, 30% hydrogen peroxide, and 30% sodium hydroxide need to be added to the first Fenton reaction tank, and the sewage retention time is about 200 minutes. Then, by adding 30% PAC (polyaluminum chloride) and anionic PAM (polyacrylamide) to the sewage, some pollutants are further removed by precipitation in the high-efficiency sedimentation tank.

[0051] Then, the sewage from the high-efficiency sedimentation tank is discharged to the denitrification deep bed filter to treat the ammonium ions in the sewage. For example, the denitrification deep bed filter is a deep treatment process that integrates physical filtration and denitrification biological deammonification functions. Denitrifying microorganisms grow on the surface of the filter material and convert nitrate ammonia in the sewage into gaseous nitrogen under facultative-gasless conditions.

[0052] Ion exchange resins are installed in the ion exchange system to further remove metal ions from the sewage. The sewage from which metal ions have been removed is then discharged into the water production pool. The water production pool can be used to collect and store clean water produced after the sewage is treated. Finally, the clean water is discharged into a contact disinfection pool equipped with disinfectants to disinfect the clean water, thereby completing the treatment and purification of the sewage so that it can meet the discharge standards.

[0053] The sewage treatment system can treat sewage multiple times, which can greatly improve the degradability and biodegradability of industrial wastewater, and deeply and effectively treat different types of high-molecular, difficult-to-degrade, and poorly biodegradable pollutants in industrial park sewage. It is comprehensive, efficient, and stable, and can meet the treatment needs of different industrial wastewaters. It is adaptable and flexible.

[0054] In addition, it can effectively improve the wastewater treatment effect, reduce operating costs, protect the environment, and achieve sustainable development. The sludge generated during the wastewater treatment process is effectively treated, which can reduce environmental pollution, and is conducive to the healthy and sustainable development of the ecological environment, providing solutions and practical basis for the treatment of industrial park wastewater.

[0055] Continue to refer to Figure 1 As shown, in some examples, due to the high water quality of sewage, a second Fenton reaction tank and a flotation tank are sequentially arranged between the regulating tank and the hydrolysis acidification tank. Among them, the second Fenton reaction tank decomposes the difficult-to-degrade organic matter into easily degradable organic matter through strong oxidation, improves the biodegradability of sewage, and ensures the treatment effect of subsequent sewage treatment structures; the flotation tank can remove the fine suspended matter generated by the second Fenton reaction tank and the floating oil in the incoming sewage, ensuring the stable operation of subsequent sewage treatment structures. A third submersible mixer is arranged in the flotation tank, which can improve the sewage treatment efficiency by promoting hydraulic circulation, improving oxygen transfer efficiency, and promoting mixing and stirring. Exemplarily, the residence time of sewage in the second Fenton reaction tank is 97 minutes, and the surface load of the separation zone of the flotation tank is 6.2m 3 / m 2 / h

[0056] In addition, in some examples, the industrial park sewage treatment system also includes a sludge thickening tank. The primary sedimentation tank, flotation tank, hydrolysis acidification tank, MBR membrane tank and high-efficiency sedimentation tank are all connected to the sludge thickening tank. The sludge thickening tank is used to concentrate the sludge generated during the sewage purification process through gravity to reduce the sludge water content in the sewage.

[0057] In some other examples, the industrial park wastewater treatment system further includes a conditioning tank and a sludge dewatering machine, the sludge thickening tank is connected to the conditioning tank, and the conditioning tank is connected to the sludge dewatering machine;

[0058] The conditioning tank is used to condition the concentrated sludge. Specifically, the concentrated sludge enters the conditioning tank, and the reagents are added and stirred to adjust the dewatering performance of the sludge. The sludge dewatering machine is used to dewater the conditioned sludge. After the moisture content of the dehydrated mud cake meets the standard, it is transported to a qualified unit for final disposal. The supernatant of the concentration tank and the filtrate after dehydration enter the factory sewage treatment system for treatment.

[0059] Continue to refer to Figure 1 As shown, in some examples, the industrial park sewage treatment system also includes an accident pool, which is connected to the primary sedimentation tank and the regulating tank. When an accident occurs in the sewage treatment structure in the factory area and it cannot operate normally, the accident pool can temporarily store the sewage entering the factory to prevent the sewage from overflowing and being discharged. When an accident occurs, the sewage is temporarily discharged into the accident pool. After the accident disappears, the wastewater in the accident pool is gradually diluted by pumping accident water into the regulating tank without affecting the normal operation of the system until all the accident water is treated. Under normal circumstances, the accident pool is in an empty pool state.

[0060] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0061] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. An industrial park sewage treatment system, characterized in that: Including primary sedimentation tank, regulating tank, hydrolysis acidification tank, improved A / O tank, MBR membrane tank, first Fenton reaction tank, high-efficiency sedimentation tank, denitrification deep bed filter, ion exchange system, water production tank and contact disinfection tank; The water outlet of the primary sedimentation tank is communicated with the water inlet of the regulating tank, the water outlet of the regulating tank is communicated with the water inlet of the hydrolysis acidification tank, the water outlet of the hydrolysis acidification tank is communicated with the water inlet of the improved A / O tank, the water outlet of the improved A / O tank is communicated with the water inlet of the MBR membrane tank, the water outlet of the MBR membrane tank is communicated with the water inlet of the first Fenton reaction tank, the water outlet of the first Fenton reaction tank is communicated with the water inlet of the high-efficiency sedimentation tank, the water outlet of the high-efficiency sedimentation tank is communicated with the water inlet of the denitrification deep bed filter, the water outlet of the denitrification deep bed filter is communicated with the water inlet of the ion exchange system, the water outlet of the ion exchange system is communicated with the water inlet of the water production tank, and the water outlet of the water production tank is communicated with the water inlet of the contact disinfection tank; Wherein, a coarse grid and a fine grid for removing suspended pollutants in the sewage are sequentially arranged on the outer side of the primary sedimentation tank in the flow direction of the sewage; The regulating tank is provided with a regulating part for regulating the water quality and water quantity of the sewage; The hydrolysis acidification tank is provided with microorganisms for decomposing organic matter, so as to decompose the organic matter in the sewage; The improved A / O tank is used to purify the sewage; The MBR membrane pool is provided with a membrane bioreactor for sewage filtration; The first Fenton reaction tank and the high-efficiency sedimentation tank are used to remove hypophosphite in the sewage; The denitrification deep bed filter is used to treat the ammonia ions in the sewage; The ion exchange system is used to remove metal ions in the sewage; The water production pool is used to collect and store clean water produced after the sewage is treated; The contact disinfection tank is provided with a disinfectant for disinfecting the clean water.

2. The industrial park sewage treatment system according to claim 1, characterized in that: The improved A / O tank comprises a pre-anoxic tank, an anaerobic tank, an anoxic tank and an aerobic tank which are connected in sequence; The pre-anoxic tank, the anaerobic tank, the anoxic tank and the aerobic tank respectively utilize microorganisms to treat organic matter in the sewage under different oxygen concentrations.

3. The industrial park sewage treatment system according to claim 1, characterized in that: A second Fenton reaction tank and an air flotation tank are arranged in sequence between the regulating tank and the hydrolysis acidification tank, wherein the second Fenton reaction tank is used to decompose the difficult-to-degrade organic matter into easily degradable organic matter; The flotation tank is used to remove suspended matter generated in the second Fenton reaction tank and floating oil in the sewage.

4. The industrial park sewage treatment system according to claim 3, characterized in that: The industrial park sewage treatment system also includes a sludge thickening tank. The primary sedimentation tank, the flotation tank, the hydrolysis acidification tank, the MBR membrane tank and the high-efficiency sedimentation tank are all connected to the sludge thickening tank. The sludge thickening tank is used to concentrate the sludge generated during the sewage purification process.

5. The industrial park sewage treatment system according to claim 4, characterized in that: The industrial park sewage treatment system further comprises a conditioning tank and a sludge dewatering machine, wherein the sludge concentration tank is connected to the conditioning tank, and the conditioning tank is connected to the sludge dewatering machine; The conditioning tank is used to condition the concentrated sludge, and the sludge dewatering machine is used to dewater the conditioned sludge.

6. The industrial park sewage treatment system according to claim 1, characterized in that: A first submersible mixer is arranged in the primary sedimentation tank.

7. The industrial park sewage treatment system according to claim 1, characterized in that: A second submersible mixer is arranged in the regulating tank.

8. The industrial park sewage treatment system according to claim 4, characterized in that: A third submersible mixer is arranged in the air flotation tank.

9. The industrial park sewage treatment system according to claim 1, characterized in that: The industrial park sewage treatment system also includes an aeration device, which includes an aeration fan, an aerator and an aeration pipeline; The aerator is connected to the aeration fan through the aeration pipeline, and the aerator is arranged in the improved A / O tank and / or the first Fenton reaction tank.

10. The industrial park sewage treatment system according to claim 1, characterized in that: The industrial park sewage treatment system also includes an accident pool, which is connected to the primary sedimentation tank and the regulating tank respectively.

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