A wastewater treatment system

Abstract

This utility model provides a wastewater treatment system, including a wastewater inlet pipe, a reaction tank, a biological tank, a secondary sedimentation tank, and a high-efficiency sedimentation tank connected in sequence. It also includes: a data acquisition module, comprising an inlet data acquisition module and an effluent data acquisition module, the inlet data acquisition module being used to collect water quality parameters at each inlet, and the effluent data acquisition module being used to collect water quality parameters at each outlet; a chemical dosing module, comprising a carbon source dosing module, a phosphorus removal agent dosing module, and a sodium hypochlorite dosing module, respectively connected to the biological tank, the high-efficiency sedimentation tank, and the reaction tank, for dosing the corresponding chemicals; and a control module that is communicatively connected to both the data acquisition module and the chemical dosing module, achieving precise chemical dosing during wastewater treatment, improving chemical utilization efficiency, and reducing treatment costs.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment equipment technology, and specifically to a wastewater treatment system. Background Technology

[0002] With the acceleration of urbanization and the increasing demands for environmental protection, wastewater treatment technology plays an increasingly important role in environmental protection. As a crucial facility for urban wastewater treatment, wastewater treatment plants directly impact water quality and economic benefits through their treatment efficiency and operating costs. In the wastewater treatment process, the dosage of chemicals is one of the key factors affecting treatment effectiveness and operating costs.

[0003] Currently, wastewater treatment plants typically employ multiple processes, including pretreatment, biological treatment, and advanced treatment. In the biological treatment stage, external carbon sources are often added to improve nitrogen removal efficiency. In the advanced treatment stage, phosphorus removal agents are usually added to ensure that the effluent phosphorus levels meet standards. In the pretreatment stage, disinfectants such as sodium hypochlorite are often added to remove pathogens and harmful substances from the wastewater. The dosage of these agents directly affects the treatment effect and operating costs.

[0004] However, existing wastewater treatment chemical dosing systems still have the following problems: First, existing chemical dosing systems lack precise real-time monitoring and control mechanisms, making it difficult to adjust the chemical dosage in a timely manner according to changes in water quality. This results in chemical waste or poor treatment effects. Furthermore, the lack of a comprehensive automated control system makes it difficult to accurately calculate and automatically adjust the chemical dosage, leading to increased operating costs and unstable treatment results. Finally, existing chemical dosing systems often lack real-time monitoring of the effluent quality from different treatment units, making it difficult to promptly identify and resolve problems during the treatment process.

[0005] Therefore, the existing technology still needs further development. Utility Model Content

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and provide a sewage treatment system to solve the problems existing in the prior art.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, this utility model provides a wastewater treatment system, comprising a wastewater inlet pipe, a reaction tank, a biological tank, a secondary sedimentation tank, and a high-efficiency sedimentation tank connected in sequence. The wastewater inlet pipe is connected to the inlet end of the reaction tank, the outlet end of the reaction tank is connected to the inlet end of the biological tank, the outlet end of the biological tank is connected to the inlet end of the secondary sedimentation tank, and the outlet end of the secondary sedimentation tank is connected to the inlet end of the high-efficiency sedimentation tank. The system includes: The data acquisition module includes an inlet water acquisition module and an outlet water acquisition module. The inlet water acquisition module is used to collect water quality parameters at each inlet end, and the outlet water acquisition module is used to collect water quality parameters at each outlet end. The reagent dosing module includes a carbon source dosing module, a phosphorus removal agent dosing module, and a sodium hypochlorite dosing module; The carbon source dosing module is connected to the biological pool and is used to add carbon source; The phosphorus removal agent dosing module is connected to the high-efficiency sedimentation tank and is used to add phosphorus removal agent; The sodium hypochlorite dosing module is connected to the reaction tank and is used to add sodium hypochlorite; The control module is communicatively connected to both the acquisition module and the reagent dosing module.

[0008] Specifically, the carbon source dosing module is connected to the inlet of the biological tank. The carbon source dosing module includes a carbon source dosing pump group and a carbon source storage tank. The carbon source storage tank is connected to the carbon source dosing pump group through a first conveying pipe. The outlet of the carbon source dosing pump group is connected to the inlet of the biological tank.

[0009] Specifically, the biological tank includes an anoxic zone and an aerobic zone. The anoxic zone includes a first anoxic zone and a second anoxic zone. The first anoxic zone includes a first dosing point and a second dosing point. The second anoxic zone includes a third dosing point and a fourth dosing point. The carbon source dosing pump group includes a main carbon source dosing pump group and a standby carbon source dosing pump group. The main carbon source dosing pump group includes a first carbon source dosing pump, a second carbon source dosing pump, a third carbon source dosing pump, and a fourth carbon source dosing pump.

[0010] Specifically, the outlet of the first carbon source dosing pump is connected to the inlet of the first anoxic zone through the first dosing point; the outlet of the second carbon source dosing pump is connected to the inlet of the first anoxic zone through the second dosing point; the outlet of the third carbon source dosing pump is connected to the inlet of the second anoxic zone through the third dosing point; and the outlet of the fourth carbon source dosing pump is connected to the inlet of the second anoxic zone through the fourth dosing point.

[0011] Specifically, the phosphorus removal agent dosing module includes a phosphorus removal agent dosing pump set and a phosphorus removal agent storage tank. The inlet of the phosphorus removal agent dosing pump set is connected to the phosphorus removal agent storage tank through a second conveying pipe, and the outlet of the phosphorus removal agent dosing pump set is connected to the high-efficiency sedimentation tank through a third conveying pipe.

[0012] Specifically, the high-efficiency sedimentation tank is equipped with a fifth dosing point and a sixth dosing point, and the phosphorus removal agent dosing pump group includes a first phosphorus removal agent dosing pump and a second phosphorus removal agent dosing pump. The fifth dosing point is connected to the outlet of the first phosphorus removal agent dosing pump, and the sixth dosing point is connected to the outlet of the second phosphorus removal agent dosing pump.

[0013] Specifically, the sodium hypochlorite dosing module includes a sodium hypochlorite storage tank and a sodium hypochlorite metering pump. The inlet of the sodium hypochlorite metering pump is connected to the sodium hypochlorite storage tank through a fourth conveying pipe, and the outlet of the sodium hypochlorite metering pump is connected to the reaction tank through a fifth conveying pipe. The reaction tank is equipped with a seventh dosing point, and the outlet of the sodium hypochlorite metering pump is connected to the seventh dosing point through a delivery pipeline.

[0014] Specifically, the acquisition module also includes: The first electromagnetic flow meter is installed in the inlet pipe of the biological tank to monitor the inlet flow rate; The second electromagnetic flow meter is installed at the outlet end of the carbon source dosing pump group to measure the amount of carbon source added. The third electromagnetic flow meter is installed at the outlet end of the phosphorus removal agent dosing pump group to measure the amount of phosphorus removal agent added. The fourth electromagnetic flow meter is installed at the outlet of the sodium hypochlorite metering pump and is used to measure the amount of sodium hypochlorite added.

[0015] Specifically, the control module includes a PLC control module, and the data acquisition module and the reagent dosing module are both communicatively connected to the PLC control module.

[0016] Beneficial effects: This invention provides a wastewater treatment system that uses a data acquisition module to monitor water quality parameters at each stage of wastewater treatment in real time. This avoids the inaccuracies of traditional manual judgment or fixed-ratio dosing methods. Through carbon source dosing, phosphorus removal agent dosing, and sodium hypochlorite dosing modules, it achieves precise control over the dosing of carbon source, phosphorus removal agent, sodium hypochlorite, and other agents, ensuring stable effluent quality, reducing agent consumption, avoiding the accumulation of organic matter and waste caused by overdosing, improving agent utilization efficiency, and further realizing automated and intelligent control of agent dosing in the wastewater treatment process. At the same time, it reduces the need for manual operation and improves the overall operating efficiency of the wastewater treatment plant. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the wastewater treatment system provided in a specific embodiment of this utility model; Figure 2 This is a schematic diagram of the wastewater treatment system provided in a specific embodiment of this utility model; Figure 3 This is a connection diagram of the carbon source dosing module provided in a specific embodiment of this utility model; Figure 4 This is a connection diagram of the phosphorus removal agent dosing module provided in a specific embodiment of this utility model; Figure 5 This is a connection diagram of the sodium hypochlorite dosing module provided in a specific embodiment of this utility model; The above figures include the following reference numerals: 100. Data Acquisition Module; 200. Chemical Dosing Module; 300. Control Module; 400. Wastewater Inlet Pipeline; 500. Reaction Tank; 600. Biological Tank; 700. Secondary Sedimentation Tank; 800. High-Efficiency Sedimentation Tank; 110. Inlet Water Acquisition Module; 120. Effluent Acquisition Module; 210. Carbon Source Dosing Module; 220. Phosphorus Removal Agent Dosing Module; 230. Sodium Hypochlorite Dosing Module; 211. Carbon Source Storage tank; 212, First conveying pipeline; 213, Carbon source dosing pump group; 214, Standby carbon source dosing pump; 215, Main carbon source dosing pump group; 216, First carbon source dosing pump; 217, Second carbon source dosing pump; 218, Third carbon source dosing pump; 219, Fourth carbon source dosing pump; 130, Second electromagnetic flowmeter; 610, Anoxic zone; 620, Aerobic zone; 611, First anoxic zone; 61 2. Second anoxic zone; 613. First dosing point; 614. Second dosing point; 615. Third dosing point; 616. Fourth dosing point; 221. Phosphorus removal agent dosing pump set; 222. Phosphorus removal agent storage tank; 223. Second delivery pipeline; 224. First regulating valve; 225. First phosphorus removal agent dosing pump; 226. Second phosphorus removal agent dosing pump; 140. Third electromagnetic flow meter; 840. Third delivery pipeline; 810. Water distribution tank; 820. Mixing reaction tank; 830. Lift pump; 811. Fifth dosing point; 812. Sixth dosing point; 231. Sodium hypochlorite metering pump; 232. Sodium hypochlorite storage tank; 233. Fourth delivery pipeline; 234. Second regulating valve; 235. Fifth delivery pipeline; 510. Seventh dosing point; 170. Residual chlorine detection module; 150. First electromagnetic flow meter. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the creation of this utility model.

[0019] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0020] Example 1 Please see Figures 1-5This embodiment provides a wastewater treatment system, including a wastewater inlet pipe 400, a reaction tank 500, a biological tank 600, a secondary sedimentation tank 700, and a high-efficiency sedimentation tank 800 connected in sequence. The wastewater inlet pipe 400 is connected to the inlet end of the reaction tank 500, the outlet end of the reaction tank 500 is connected to the inlet end of the biological tank 600, the outlet end of the biological tank 600 is connected to the inlet end of the secondary sedimentation tank 700, and the outlet end of the secondary sedimentation tank 700 is connected to the inlet end of the high-efficiency sedimentation tank 800.

[0021] See Figure 1 The wastewater treatment system in this embodiment also includes a data acquisition module 100, a reagent dosing module 200, and a control module 300.

[0022] See Figure 1 and Figure 2 In this embodiment, the acquisition module 100 includes an influent acquisition module 110 and an effluent acquisition module 120. The influent acquisition module 110 is used to acquire water quality parameters at each influent point, and the effluent acquisition module 120 is used to acquire water quality parameters at each effluent point. The influent acquisition module 110 is installed at the influent points of the sewage influent pipe 400, the reaction tank 500, the biological tank 600, the secondary sedimentation tank 700, and the high-efficiency sedimentation tank 800, and is used to monitor the water quality parameters at each influent point in real time, including key indicators such as pH value, turbidity, ammonia nitrogen content, total phosphorus content, and COD value. The effluent acquisition module 120 is installed at the effluent points of the reaction tank 500, the biological tank 600, the secondary sedimentation tank 700, and the high-efficiency sedimentation tank 800, and is used to monitor the water quality parameters at each effluent point in real time, also including key indicators such as pH value, turbidity, ammonia nitrogen content, total phosphorus content, and COD value.

[0023] See Figure 2 In this embodiment, the reagent dosing module 200 includes a carbon source dosing module 210, a phosphorus removal agent dosing module 220, and a sodium hypochlorite dosing module 230. The carbon source dosing module 210 is connected to the biological tank 600 and is used to add a carbon source; the phosphorus removal agent dosing module 220 is connected to the high-efficiency sedimentation tank 800 and is used to add a phosphorus removal agent; the sodium hypochlorite dosing module 230 is connected to the reaction tank 500 and is used to add sodium hypochlorite.

[0024] See Figure 3In this embodiment, the carbon source dosing module 210 is connected to the inlet of the biological tank 600. The carbon source dosing module 210 includes a carbon source dosing pump assembly 213 and a carbon source storage tank 211. The carbon source storage tank 211 is connected to the carbon source dosing pump assembly 213 via a first conveying pipe 212, and the outlet of the carbon source dosing pump assembly 213 is connected to the inlet of the biological tank 600. The carbon source storage tank 211 is made of corrosion-resistant material and has a volume of 10-20 cubic meters, used to store carbon source substances such as methanol and sodium acetate. The carbon source dosing pump assembly 213 can be a metering pump with a flow rate range of 0-100 L / h and an accuracy of ±1%, which can automatically adjust the dosing amount according to the inlet water quality parameters of the biological tank 600.

[0025] See Figure 3 In this embodiment, the biological tank 600 includes anoxic zone 610 and aerobic zone 620. Anoxic zone 610 includes a first anoxic zone 611 and a second anoxic zone 612. The first anoxic zone 611 includes a first dosing point 613 and a second dosing point 614. The second anoxic zone 612 includes a third dosing point 615 and a fourth dosing point 616. The carbon source dosing pump group 213 includes a main carbon source dosing pump group 215 and a standby carbon source dosing pump 214. The main carbon source dosing pump group 215 includes a first carbon source dosing pump 216, a second carbon source dosing pump 217, a third carbon source dosing pump 218, and a fourth carbon source dosing pump 219. The volume ratio of the first anoxic zone 611 to the second anoxic zone 612 is 3:2. The volume of the first anoxic zone 611 is 300-500 cubic meters, the volume of the second anoxic zone 612 is 200-300 cubic meters, and the volume of the aerobic zone 620 is 800-1200 cubic meters. All four carbon source dosing pumps in the main carbon source dosing pump group 215 are metering pumps with a flow rate range of 0-50 L / h and an accuracy of ±0.5%. The parameters of the standby carbon source dosing pump 214 are the same as those of the main carbon source dosing pump group 215, and its function is to automatically start when the main carbon source dosing pump group 215 fails.

[0026] See Figure 3 In this embodiment, the outlet of the first carbon source dosing pump 216 is connected to the inlet of the first anoxic zone 611 via the first dosing point 613; the outlet of the second carbon source dosing pump 217 is connected to the inlet of the first anoxic zone 611 via the second dosing point 614; the outlet of the third carbon source dosing pump 218 is connected to the inlet of the second anoxic zone 612 via the third dosing point 615; and the outlet of the fourth carbon source dosing pump 219 is connected to the inlet of the second anoxic zone 612 via the fourth dosing point 616. The first dosing point 613 and the second dosing point 614 are located on the left and right sides of the inlet end of the first anoxic zone 611, respectively, and are 2-3 meters apart. The third dosing point 615 and the fourth dosing point 616 are located on the left and right sides of the inlet end of the second anoxic zone 612, respectively, and are 2-3 meters apart. This arrangement ensures that the carbon source can be evenly distributed in the anoxic zone 610, thereby improving the utilization efficiency of the carbon source.

[0027] See Figure 4 In this embodiment, the phosphorus removal agent dosing module 220 includes a phosphorus removal agent dosing pump assembly 221 and a phosphorus removal agent storage tank 222. The inlet of the phosphorus removal agent dosing pump assembly 221 is connected to the phosphorus removal agent storage tank 222 via a second conveying pipe 223, and the outlet of the phosphorus removal agent dosing pump assembly 221 is connected to the high-efficiency sedimentation tank 800 via a third conveying pipe 840. The phosphorus removal agent storage tank 222 is made of corrosion-resistant material and has a volume of 5-10 cubic meters. It is used to store phosphorus removal agents such as polyaluminum chloride and polyferric sulfate. The phosphorus removal agent dosing pump assembly 221 is a metering pump with a flow rate range of 0-80 L / h and an accuracy of ±1%. It can automatically adjust the dosing amount according to the influent water quality parameters of the high-efficiency sedimentation tank 800.

[0028] Furthermore, a first regulating valve 224 is installed on the second conveying pipe 223. The first regulating valve 224 is used to regulate the opening of the second conveying pipe 223. By adjusting the first regulating valve 224, the dosage of the dephosphorizing agent can be precisely controlled, ensuring the dephosphorization effect while avoiding resource waste caused by excessive dosage. Preferably, the regulating valve 240 can be a V-type electric ball valve, whose ball surface is machined with a V-shaped opening. By rotating the angle (usually 0°~90°) to change the flow area, the flow rate can be linearly adjusted.

[0029] See Figure 4 In this embodiment, the high-efficiency sedimentation tank 800 is equipped with a fifth dosing point 811 and a sixth dosing point 812. The phosphorus removal agent dosing pump group 221 includes a first phosphorus removal agent dosing pump 225 and a second phosphorus removal agent dosing pump 226. The fifth dosing point 811 is connected to the outlet end of the first phosphorus removal agent dosing pump 225, and the sixth dosing point 812 is connected to the outlet end of the second phosphorus removal agent dosing pump 226. The fifth dosing point 811 is located at the upper part of the inlet end of the high-efficiency sedimentation tank 800, 0.5-1 meter from the water surface, and the sixth dosing point 812 is located at the lower part of the inlet end of the high-efficiency sedimentation tank 800, 0.5-1 meter from the bottom of the tank. This arrangement ensures that the phosphorus removal agent can be fully mixed in the high-efficiency sedimentation tank 800, thereby improving the phosphorus removal efficiency. Both the first phosphorus removal agent dosing pump 225 and the second phosphorus removal agent dosing pump 226 are metering pumps with a flow rate range of 0-40 L / h and an accuracy of ±0.5%.

[0030] In some specific embodiments, the high-efficiency sedimentation tank 800 includes a water distribution tank 810 and a mixing reaction tank 820. The inlet of the water distribution tank 810 is connected to the outlet of the secondary sedimentation tank 700 via a pipe, and the outlet of the water distribution tank 810 is connected to the inlet of the mixing reaction tank 820 via a lift pump 830. The water distribution tank 810 is equipped with a fifth dosing point 811 and a sixth dosing point 812, which are respectively connected to the outlets of the first phosphorus removal agent dosing pump 225 and the second phosphorus removal agent dosing pump 226. This multi-point dosing allows the phosphorus removal agent to be evenly distributed at different stages, improving the contact efficiency between the agent and the wastewater and enhancing the phosphorus removal effect. At the same time, the design of the lift pump 830 allows the wastewater to enter the mixing reaction tank 820 at an appropriate speed, promoting thorough mixing of the agent and the wastewater and improving the reaction efficiency.

[0031] In some specific embodiments, a stirrer is also installed at the top of the mixing reaction tank 820. The stirrer is used to mix and react the wastewater with the phosphorus removal agent by stirring, forming flocs which then enter the subsequent sedimentation and separation stage. The speed of the stirrer can be adjusted according to actual treatment needs to ensure that the wastewater and phosphorus removal agent are fully mixed and reacted.

[0032] In some specific embodiments, the phosphorus removal agent dosing module 220 also includes a dosing pump frequency meter, which is electrically connected to the phosphorus removal agent dosing pump group 221 and is used to monitor and collect the operating frequency of the phosphorus removal agent dosing pump group 221 in real time.

[0033] See Figure 5 In this embodiment, the sodium hypochlorite dosing module 230 includes a sodium hypochlorite storage tank 232 and a sodium hypochlorite metering pump 231. The inlet of the sodium hypochlorite metering pump 231 is connected to the sodium hypochlorite storage tank 232 via a fourth conveying pipe 233, and the outlet of the sodium hypochlorite metering pump 231 is connected to the reaction tank 500 via a fifth conveying pipe 235. The reaction tank 500 is equipped with a seventh dosing point 510, and the outlet of the sodium hypochlorite metering pump 231 is connected to the seventh dosing point 510 via the fifth conveying pipe 235. The sodium hypochlorite storage tank 232 is made of corrosion-resistant material and has a volume of 3-5 cubic meters. It is used to store a sodium hypochlorite solution with an effective chlorine content of 10%. The flow rate range of the sodium hypochlorite metering pump 231 is 0-30 L / h, with an accuracy of ±0.5%, and the dosing amount can be automatically adjusted according to the water quality parameters of the influent to the reaction tank 500. The seventh dosing point, 510, is located at the inlet end of the reaction tank 500, 1-2 meters away from the inlet, to ensure that sodium hypochlorite can be fully mixed with the sewage and play a role in disinfection and oxidation.

[0034] In some specific embodiments, a second regulating valve 234 is provided on the fourth delivery pipe 233. The second regulating valve 234 is used to regulate the opening degree of the fourth delivery pipe 233. The second regulating valve 234 is an electrically operated regulating valve, which can automatically adjust its opening degree according to the control signal to achieve precise control of the sodium hypochlorite dosage. The opening degree range of the second regulating valve 234 is 0-100%, and the response time is less than 5 seconds, ensuring that the system can respond quickly to changes in water quality.

[0035] In some specific embodiments, the sodium hypochlorite dosing module also includes a residual chlorine detection module 170. The residual chlorine detection module 170 is installed at the effluent end of the reaction tank 500 to detect the residual chlorine concentration at the effluent end of the reaction tank 500. The residual chlorine detection module 170 can employ an online residual chlorine analyzer with a measurement range of 0-10 mg / L and an accuracy of ±0.05 mg / L. It can monitor the residual chlorine concentration in the effluent in real time, ensuring that the effluent quality meets discharge standards.

[0036] See Figures 3-5 In this embodiment, the data acquisition module 100 further includes a first electromagnetic flowmeter 150, a second electromagnetic flowmeter 130, a third electromagnetic flowmeter 140, and a fourth electromagnetic flowmeter. The first electromagnetic flowmeter 150 is installed in the inlet pipe of the biological tank 600 to monitor the inlet flow rate; the second electromagnetic flowmeter 130 is installed at the outlet of the carbon source dosing pump group 213 to measure the amount of carbon source added; the third electromagnetic flowmeter 140 is installed at the outlet of the phosphorus removal agent dosing pump group 221 to measure the amount of phosphorus removal agent added; and the fourth electromagnetic flowmeter is installed at the outlet of the sodium hypochlorite metering pump 231 to measure the amount of sodium hypochlorite added. The accuracy of all the above electromagnetic flowmeters is ±0.5%, and their ranges are 0-1000 m³ / h, 0-100 L / h, 0-80 L / h, and 0-30 L / h, respectively. They monitor the flow data of each pipe in real time, providing accurate reference data for agent dosing.

[0037] Preferably, the electromagnetic flow meter can be a DN65 electromagnetic flow meter, which features corrosion resistance, high-precision measurement and flange connection, and is particularly suitable for measuring corrosive media in chemical, environmental protection and other fields.

[0038] See Figure 1 In this embodiment, the control module 300 includes a PLC control module. The data acquisition module 100 and the reagent dosing module 200 are both communicatively connected to the PLC control module. The PLC control module adopts a Siemens S7-1200 series programmable controller, which has 16 digital inputs, 12 digital outputs, 8 analog inputs and 4 analog outputs. It is connected to the data acquisition module 100 and the reagent dosing module 200 through an RS485 communication interface.

[0039] The working process of the wastewater treatment system in this embodiment is as follows: First, the acquisition module 100 collects water quality parameters at each inlet and outlet in real time, including pH value, turbidity, ammonia nitrogen content, total phosphorus content, COD value, etc., and transmits these data to the control module 300; then, the control module 300 is connected to the carbon source dosing module 210, the phosphorus removal agent dosing module 220, and the sodium hypochlorite dosing module 230 to achieve precise dosing of the agents.

[0040] It should be noted that this embodiment provides a wastewater treatment system that avoids the inaccuracies of traditional manual experience-based judgment or fixed-ratio dosing methods. By using carbon source dosing modules, phosphorus removal agent dosing modules, and sodium hypochlorite dosing modules, it achieves precise control over the dosing of carbon source, phosphorus removal agent, sodium hypochlorite, and other agents, ensuring stable compliance of effluent quality, reducing agent consumption, avoiding the accumulation of organic matter and waste generation caused by excessive dosing, improving agent utilization efficiency, and further realizing automated and intelligent control of agent dosing during wastewater treatment. At the same time, it reduces the need for manual operation and improves the overall operating efficiency of the wastewater treatment plant.

[0041] Example 2 Please see Figure 2 This embodiment provides a wastewater treatment system, which also includes a wastewater pretreatment unit, a sludge treatment unit, and a central control system.

[0042] Furthermore, the wastewater pretreatment unit is located upstream of the wastewater inlet pipe 400 and includes a screen, a grit chamber, and a regulating tank. The screen is used to remove large suspended solids from the wastewater, the grit chamber is used to remove sand and inorganic particles from the wastewater, and the regulating tank is used to balance the water volume and quality. After passing through the pretreatment unit, the wastewater enters the reaction tank 500 through the wastewater inlet pipe 400.

[0043] Furthermore, the sludge treatment unit is connected to the secondary sedimentation tank 700 and the high-efficiency sedimentation tank 800 to treat the excess sludge generated during wastewater treatment. The sludge treatment unit includes a sludge thickening tank, a sludge dewatering machine, and sludge storage facilities. The specific working process is as follows: the excess sludge generated in the secondary sedimentation tank 700 and the high-efficiency sedimentation tank 800 first enters the sludge thickening tank for thickening, then undergoes dewatering treatment by the sludge dewatering machine, and finally is temporarily stored in the sludge storage facilities for periodic off-site disposal.

[0044] Furthermore, the central control system is communicatively connected to the control module 300 in Embodiment 1 to monitor the operating status of the entire wastewater treatment system. The central control system also includes an industrial control computer and a large-screen display device to display the operating parameters, water quality data and equipment status of each treatment unit in real time, and has data storage, statistical analysis and alarm functions.

[0045] The wastewater treatment system operates as follows: First, wastewater passes through a pretreatment unit to remove large suspended solids and sand. Then, it enters a reaction tank 500 via a wastewater inlet pipe 400, where sodium hypochlorite is added for disinfection and oxidation. The treated wastewater then enters a biological treatment tank 600, where a carbon source is added to remove organic matter and nitrogen through biological processes. Next, the wastewater enters a secondary sedimentation tank 700 for solid-liquid separation. Finally, it enters a high-efficiency sedimentation tank 800, where a phosphorus removal agent is added to remove phosphorus and remaining suspended solids. The treated water meets discharge standards. Throughout the entire treatment process, the dosage of each agent is precisely adjusted based on water quality parameters and flow data to ensure treatment effectiveness and agent utilization efficiency.

[0046] It should be noted that this embodiment provides a wastewater treatment system that avoids the inaccuracies of traditional manual experience-based judgment or fixed-ratio dosing methods. By using carbon source dosing modules, phosphorus removal agent dosing modules, and sodium hypochlorite dosing modules, it achieves precise control over the dosing of carbon source, phosphorus removal agent, sodium hypochlorite, and other agents, ensuring stable compliance of effluent quality, reducing agent consumption, avoiding the accumulation of organic matter and waste generation caused by excessive dosing, improving agent utilization efficiency, and further realizing automated and intelligent control of agent dosing during wastewater treatment. At the same time, it reduces the need for manual operation and improves the overall operating efficiency of the wastewater treatment plant.

[0047] The technical features described above can be combined arbitrarily. Although not all possible combinations of these technical features are described, any combination of these technical features should be considered to be covered by this specification, provided that such combination does not contain contradictions.

[0048] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A wastewater treatment system, comprising a wastewater inlet pipe, a reaction tank, a biological tank, a secondary sedimentation tank, and a high-efficiency sedimentation tank connected in sequence, wherein the wastewater inlet pipe is connected to the inlet end of the reaction tank, the outlet end of the reaction tank is connected to the inlet end of the biological tank, the outlet end of the biological tank is connected to the inlet end of the secondary sedimentation tank, and the outlet end of the secondary sedimentation tank is connected to the inlet end of the high-efficiency sedimentation tank, characterized in that, include: The data acquisition module includes an inlet water acquisition module and an outlet water acquisition module. The inlet water acquisition module is used to collect water quality parameters at each inlet end, and the outlet water acquisition module is used to collect water quality parameters at each outlet end. The reagent dosing module includes a carbon source dosing module, a phosphorus removal agent dosing module, and a sodium hypochlorite dosing module; The carbon source dosing module is connected to the biological pool and is used to add carbon source; The phosphorus removal agent dosing module is connected to the high-efficiency sedimentation tank and is used to add phosphorus removal agent; The sodium hypochlorite dosing module is connected to the reaction tank and is used to add sodium hypochlorite; The control module is communicatively connected to both the acquisition module and the reagent dosing module.

2. The wastewater treatment system according to claim 1, characterized in that, The carbon source dosing module is connected to the inlet of the biological tank. The carbon source dosing module includes a carbon source dosing pump group and a carbon source storage tank. The carbon source storage tank is connected to the carbon source dosing pump group through a first conveying pipe. The outlet of the carbon source dosing pump group is connected to the inlet of the biological tank.

3. The wastewater treatment system according to claim 2, characterized in that, The biological tank includes an anoxic zone and an aerobic zone. The anoxic zone includes a first anoxic zone and a second anoxic zone. The first anoxic zone includes a first dosing point and a second dosing point. The second anoxic zone includes a third dosing point and a fourth dosing point. The carbon source dosing pump group includes a main carbon source dosing pump group and a standby carbon source dosing pump group. The main carbon source dosing pump group includes a first carbon source dosing pump, a second carbon source dosing pump, a third carbon source dosing pump, and a fourth carbon source dosing pump.

4. The wastewater treatment system according to claim 3, characterized in that, The outlet of the first carbon source dosing pump is connected to the inlet of the first anoxic zone through the first dosing point; the outlet of the second carbon source dosing pump is connected to the inlet of the first anoxic zone through the second dosing point; the outlet of the third carbon source dosing pump is connected to the inlet of the second anoxic zone through the third dosing point; and the outlet of the fourth carbon source dosing pump is connected to the inlet of the second anoxic zone through the fourth dosing point.

5. The wastewater treatment system according to claim 4, characterized in that, The phosphorus removal agent dosing module includes a phosphorus removal agent dosing pump set and a phosphorus removal agent storage tank. The inlet of the phosphorus removal agent dosing pump set is connected to the phosphorus removal agent storage tank through a second conveying pipe, and the outlet of the phosphorus removal agent dosing pump set is connected to the high-efficiency sedimentation tank through a third conveying pipe.

6. The wastewater treatment system according to claim 5, characterized in that, The high-efficiency sedimentation tank is equipped with a fifth dosing point and a sixth dosing point. The phosphorus removal agent dosing pump group includes a first phosphorus removal agent dosing pump and a second phosphorus removal agent dosing pump. The fifth dosing point is connected to the outlet of the first phosphorus removal agent dosing pump, and the sixth dosing point is connected to the outlet of the second phosphorus removal agent dosing pump.

7. The wastewater treatment system according to claim 6, characterized in that, The sodium hypochlorite dosing module includes a sodium hypochlorite storage tank and a sodium hypochlorite metering pump. The inlet of the sodium hypochlorite metering pump is connected to the sodium hypochlorite storage tank through a fourth conveying pipe, and the outlet of the sodium hypochlorite metering pump is connected to the reaction tank through a fifth conveying pipe. The reaction tank is equipped with a seventh dosing point, and the outlet of the sodium hypochlorite metering pump is connected to the seventh dosing point via a delivery pipeline.

8. The wastewater treatment system according to claim 7, characterized in that, The acquisition module also includes: The first electromagnetic flow meter is installed in the inlet pipe of the biological tank to monitor the inlet flow rate; The second electromagnetic flow meter is installed at the outlet end of the carbon source dosing pump group to measure the amount of carbon source added. The third electromagnetic flow meter is installed at the outlet end of the phosphorus removal agent dosing pump group to measure the amount of phosphorus removal agent added. The fourth electromagnetic flow meter is installed at the outlet of the sodium hypochlorite metering pump and is used to measure the amount of sodium hypochlorite added.

9. The wastewater treatment system according to claim 1, characterized in that, The control module includes a PLC control module, and the data acquisition module and the reagent dosing module are both communicatively connected to the PLC control module.

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