A highway service area sewage treatment system
By introducing regulating baffles and drive structures into the sewage treatment system of highway service areas, combined with MBR membrane tanks and ultraviolet catalysis structures, the treatment process was optimized, solving the problem of weak treatment capacity of the sewage treatment system when there are drastic fluctuations in water volume and quality, and achieving efficient and stable sewage treatment results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIAONING TRAFFIC KEXUE RES YUAN
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-23
AI Technical Summary
Existing wastewater treatment systems in highway service areas are inadequate in dealing with drastic fluctuations in water volume and quality, and cannot effectively treat complex pollutants such as wastewater with low carbon-to-nitrogen ratios, high nitrogen-to-phosphorus concentrations, high oil content from catering establishments, and high ammonia-to-nitrogen wastewater from toilets.
A wastewater treatment system for highway service areas was designed. By adjusting the combination of baffles and drive structures, the volume of the regulating tank is adjusted according to the actual influent characteristics. Combined with MBR membrane tanks, ultraviolet catalytic structures and photovoltaic power generation devices, the treatment process is optimized to achieve dynamic regulation of water quantity and quality.
The system performed well in dealing with drastic fluctuations, reduced operating costs, improved processing efficiency, achieved stable emissions compliance throughout the year, and reduced the amount of chemical disinfectants used and the frequency of maintenance.
Smart Images
Figure CN224394747U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a wastewater treatment system for highway service areas. Background Technology
[0002] In recent years, with the rapid development of highway construction, service areas, as key nodes in the transportation system, have become increasingly prominent in their wastewater discharge problems, while ensuring driving safety and alleviating driver fatigue. Service area wastewater is characterized by a low carbon-to-nitrogen ratio, high nitrogen and phosphorus concentrations, and drastic fluctuations in water quality and quantity. It is significantly affected by peak traffic during holidays (e.g., daily wastewater volume can reach more than three times that of weekdays), and contains complex pollutants such as high-oil wastewater from restaurants and high-ammonia-nitrogen wastewater from toilets.
[0003] Currently, wastewater treatment in service areas mostly adopts A 2 While technologies such as O2O, MBR, and constructed wetlands are commonly used, the current process design of service area wastewater treatment systems mostly adopts the design parameters of municipal wastewater treatment plants, which is severely out of sync with actual influent characteristics. This results in the system's inability to cope with drastic fluctuations. Therefore, it is necessary to find a service area wastewater treatment system that can match actual influent characteristics and cope with drastic fluctuations. Utility Model Content
[0004] In view of this, the present invention provides a sewage treatment system for highway service areas.
[0005] Specifically, the following technical solutions are included:
[0006] This application provides a wastewater treatment system for highway service areas, comprising:
[0007] Equalization tank, water treatment tank, equalization baffle, drive structure, control platform;
[0008] The regulating baffle is provided between the regulating tank and the water treatment tank. The driving structure is connected to the regulating baffle. The driving structure drives the regulating baffle to move in order to adjust the volume of the regulating tank. The driving structure is electrically connected to the control platform.
[0009] For example, under the drive of the drive structure, the system switches between a first operating mode, a second operating mode, and a third operating mode; in the first operating mode, the adjusting baffle is located at the designed position; in the second operating mode, the adjusting baffle moves relative to the designed position to reduce the volume of the adjusting pool; in the third operating mode, the adjusting baffle moves relative to the designed position to increase the volume of the adjusting pool.
[0010] For example, in the second or third operating mode, the distance relationship between the adjusting baffle and the designed position is as follows:
[0011]
[0012] Wherein, D_baffle is the distance between the adjusting baffle and the designed position, in meters; Q_real-time is the real-time sewage volume, in meters. 3 / h; Q is the design wastewater treatment capacity, m 3 / h; L is the maximum length of the equalization tank, in meters.
[0013] For example, in the second or third operating mode, the distance relationship between the adjusting baffle and the designed position is as follows:
[0014]
[0015] Wherein, D_baffle is the distance between the adjustable baffle and the designed position, in meters; Q_vehicle is the real-time traffic flow, in vehicles per hour; α is the traffic flow coefficient, which is the product of per capita drainage and passenger capacity coefficient, in liters per vehicle per trip; S_service area is the total area of catering and restrooms in the service area, in square meters; β is the drainage coefficient per unit area of the service area, in liters per square meter. 2 ·h; Q is the design wastewater treatment capacity, in meters. 3 / h; L is the maximum length of the equalization tank, in meters.
[0016] For example, the movement positions of the adjusting baffle include a first position, a second position, and a third position;
[0017] The control platform includes a timing unit, which is electrically connected to the drive structure. The drive structure drives the adjusting baffle to move to the first position, the second position, or the third position at regular intervals.
[0018] For example, the system includes a liquid level detection device disposed in the regulating tank, the liquid level detection device and the control platform are electrically connected, and the control platform is used to control the start and stop of the drive structure according to the feedback information of the liquid level detection device.
[0019] For example, the system further includes an MBR membrane tank, and the water treatment tank and the MBR membrane tank are connected or disconnected by a first lift pump;
[0020] The MBR membrane cell is equipped with an ultraviolet catalytic structure.
[0021] For example, the system further includes an electric heating device and a temperature detection element;
[0022] The electric heating device and the temperature detection element are installed in the MBR membrane tank.
[0023] For example, the system also includes a photovoltaic power generation device;
[0024] The photovoltaic power generation device is electrically connected to the drive structure, the control platform, and the electric heating device.
[0025] For example, the water treatment tank includes an anoxic tank, an aerobic tank, and a reflux structure;
[0026] The inlet of the reflux structure is located in the aerobic tank, and the outlet of the reflux structure is located in the anoxic tank.
[0027] The beneficial effects of the technical solution provided by this utility model include at least the following:
[0028] This application, by setting up an adjusting baffle and a drive structure, can adjust the position of the adjusting baffle by controlling the drive structure through the control platform according to the actual water inflow characteristics, so as to adjust the volume of the equalization tank. The system performs well when dealing with drastic fluctuations. Attached Figure Description
[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0030] Figure 1 This is a schematic diagram of the automatic filling device in one embodiment of the present invention.
[0031] The reference numerals in the figure are respectively:
[0032] 11. Adjusting baffle; 12. First baffle; 13. Second baffle; 21. Equalization tank; 211. Left side plate; 22. Anaerobic tank; 23. Anoxic tank; 24. Aerobic tank; 31. Drive motor; 32. Transmission structure; 4. Control platform; 5. Photovoltaic power generation device; 6. MBR membrane tank; 61. Membrane module; 62. Ultraviolet LED lamp; 7. Blower; 71. Main blower valve; 72. First blower valve; 73. First aeration pump; 74. Second aeration pump; 81. First lift pump; 82. Second lift pump; 9. Return pump.
[0033] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0035] Before further describing the embodiments of this utility model in detail, the directional terms involved in the embodiments of this utility model, such as "upper part," "lower part," and "side part," are used to refer to... Figure 1 The orientation shown is a reference and does not limit the scope of protection of this utility model.
[0036] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.
[0037] As mentioned above, the process design of most current service area wastewater treatment systems adopts the design parameters of urban wastewater treatment plants, which is seriously out of sync with the actual influent characteristics, resulting in poor system performance when dealing with drastic fluctuations. Therefore, this application provides a wastewater treatment system for highway service areas.
[0038] In one embodiment, such as Figure 1 As shown, a wastewater treatment system for a highway service area includes: an equalization tank 21, a water treatment tank, an equalization baffle 11, a drive structure, and a control platform 4. The equalization baffle 11 is installed between the equalization tank 21 and the water treatment tank. The drive structure is connected to the equalization baffle 11, and the drive structure drives the equalization baffle 11 to move, thereby adjusting the volume of the equalization tank 21. The drive structure and the control platform 4 are electrically connected. This application, by setting the equalization baffle 11 and the drive structure, can adjust the position of the equalization baffle 11 according to the actual influent characteristics through the control platform 4, thereby adjusting the volume of the equalization tank 21. The system performs well in dealing with drastic fluctuations.
[0039] In one embodiment, such as Figure 1As shown, the water treatment tank includes an anaerobic tank 22, an anoxic tank 23, and an aerobic tank 24. The equalization tank 21, anaerobic tank 22, anoxic tank 23, and aerobic tank 24 are housed in the same enclosure. An equalization baffle 11 isolates the equalization tank 21 from the anaerobic tank 22, a first baffle 12 isolates the anaerobic tank 22 from the anoxic tank 23, and a second baffle 13 isolates the anoxic tank 23 from the aerobic tank 24. Wastewater flows sequentially through the equalization tank 21, anaerobic tank 22, anoxic tank 23, and aerobic tank 24 before entering the MBR membrane tank 6. The equalization tank 21 is used to balance water quality and quantity, providing stable influent conditions for subsequent treatment processes. The anaerobic tank 22 is used for the hydrolysis and acidification of complex organic matter, breaking down large organic molecules into smaller fatty acids, creating favorable conditions for subsequent treatment. The anoxic tank 23 is used to break down large organic molecules into smaller organic molecules and simultaneously remove nitrogen. The aerobic tank 24 is used to remove organic matter and convert ammonia nitrogen into nitrate. The MBR membrane tank 6 is equipped with a membrane module 61, which can be an organic polymer membrane such as polyvinylidene fluoride, polyethersulfone, or polypropylene, or an inorganic membrane such as a ceramic membrane or a metal membrane, for the removal of organic matter and suspended solids.
[0040] In one embodiment, the driving structure includes a drive motor 31 and a transmission structure 32. The transmission structure 32 is disposed on the top of the water regulating tank 21. The regulating baffle 11 is connected to the transmission structure 32, and the transmission structure 32 is connected to the drive motor 31. The drive motor 31 drives the transmission structure 32 to move the regulating baffle 11 along the length direction of the regulating tank 21. During the sewage treatment process, the water flows along the length direction of the regulating tank 21. The length direction of the regulating tank 21 is as follows: Figure 1 As shown, the equalization tank 21, anaerobic tank 22, anoxic tank 23, and aerobic tank 24 are arranged sequentially along the length of the equalization tank 21. It is understood that the specific form of the transmission structure 32 is not specifically limited, as long as it enables the adjusting baffle 11 to move along the length of the water treatment tank. The transmission structure 32 can be a lead screw, with the adjusting baffle 11 and the lead screw connected by a thread; the transmission structure 32 can be a chain structure, with the adjusting baffle 11 connected to the chain; the transmission structure 32 can also be a track, with the adjusting baffle 11 and the track slidably connected.
[0041] In one embodiment, driven by the drive structure, the system switches between a first operating mode, a second operating mode, and a third operating mode; in the first operating mode, the adjusting baffle 11 is located at the designed position; in the second operating mode, the adjusting baffle 11 moves relative to the designed position to reduce the volume of the adjusting pool 21; in the third operating mode, the adjusting baffle 11 moves relative to the designed position to increase the volume of the adjusting pool 21.
[0042] In one embodiment, the design position is the position of the adjusting baffle 11 within the design dimensions of the regulating pool 21. At this time, the volume of the regulating pool 21 is the design volume. The design position is the initial position of the adjusting baffle 11.
[0043] In one embodiment, such as Figure 1 As shown, the regulating pool 21 includes a left side plate 211, and the left side plate 211 and the regulating baffle 11 are arranged in parallel opposite directions. In the second operating mode, the regulating baffle 11 moves towards the left side plate 211 relative to the designed position; in the third operating mode, the regulating baffle 11 moves away from the left side plate 211 relative to the designed position.
[0044] In one embodiment, in the second operating mode, the regulating pool 21 achieves its minimum volume, at which point the distance between the regulating baffle 11 and the left side plate 211 is shortest. In the third operating mode, the regulating pool 21 achieves its maximum volume, at which point the distance between the regulating baffle 11 and the left side plate 211 is longest. The ratio between the minimum volume and the designed volume of the regulating pool 21 is 0.6, and the ratio between the maximum volume and the designed volume of the regulating pool 21 is 1.5.
[0045] In one embodiment, when the system is in the second or third operating mode, the distance relationship between the baffle 11 and the designed position is adjusted as follows:
[0046]
[0047] Among them, D 挡板 To adjust the distance between baffle 11 and the designed position, m; Q 实时 The real-time wastewater volume can be manually entered into control platform 4, or calculated using an algorithm. 3 / h;Q 设计 To design the wastewater treatment capacity, manually input the value in m into control platform 4. 3 / h;L 池长 The maximum length of the regulating pool 21 is manually input into the control platform 4 in meters.
[0048] In one embodiment, when the system is in the second or third operating mode, the distance relationship between the baffle 11 and the designed position is adjusted as follows:
[0049]
[0050] Among them, D 挡板 To adjust the distance between baffle 11 and the designed position, m; Q 车 Real-time traffic flow can be manually input into control platform 4 or obtained through sensors, in vehicles / hour; α is the traffic flow coefficient, manually input into control platform 4; S 服务区 The total area of catering and restroom facilities in the service area is manually entered into control platform 4, in m2; β is the drainage coefficient per unit area of the service area, manually entered into control platform 4, for example, 5-10 L / m2. 2 ·h;Q设计 To design the wastewater treatment capacity, manually input the value in m into control platform 4. 3 / h;L 池长 The maximum length of the regulating pool 21 is manually input into the control platform 4 in meters.
[0051] In one embodiment, the traffic flow coefficient α is the product of per capita water displacement and passenger capacity coefficient, expressed in L / vehicle·trip. Per capita water displacement k 人均 The capacity is 30-50L / person / trip. The passenger capacity coefficient γ for buses is 1.5-2.5 people / vehicle, and the passenger capacity coefficient γ for freight vehicles is 0.2-0.5 people / vehicle.
[0052] In one embodiment, the real-time wastewater volume Q 实时 and real-time traffic flow Q 车 The total area of restaurants and restrooms in the service area is S 服务区 The relationship is:
[0053] Q 实时 =Q 车 α+S 服务区 ·β
[0054] In one embodiment, the system is determined to operate in a first, second, or third mode based on the ratio between the real-time wastewater volume Qreal-time and the designed wastewater treatment volume Qdesign. When the ratio is greater than 0.8, the system is determined to operate in the third mode; when the ratio is less than 0.3, the system is determined to operate in the second mode; and when the ratio is greater than or equal to 0.3 and less than or equal to 0.8, the system is determined to operate in the first mode.
[0055] In one embodiment, during holidays or peak traffic periods, the regulating baffle 11 can be moved back to its maximum volume, expanding the effective volume of the regulating tank 21 to a maximum of 150% of the design volume to cope with instantaneous water surges; while at night or during off-peak periods, the regulating baffle 11 automatically moves forward, reducing the effective volume of the regulating tank 21 to a minimum of 60% of the design volume, thereby shortening the wastewater retention time and reducing carbon source loss.
[0056] In one embodiment, the system includes a liquid level detection device disposed in the regulating tank 21, and the liquid level detection device is electrically connected to the control platform 4. The control platform 4 is used to control the start and stop of the drive structure based on the feedback information from the liquid level detection device.
[0057] In one embodiment, when the level sensor detects that the current liquid level in the equalization tank 21 is equal to or greater than a preset lower limit level, the control platform 4 controls the start of the drive structure. After the drive structure is started, the system is determined to operate in a first, second, or third mode based on the ratio between the real-time wastewater volume Q and the designed wastewater treatment volume Qdesign. When the level sensor detects that the current liquid level in the equalization tank 21 is equal to or greater than a preset upper limit level, the control platform 4 controls the drive structure to shut down. Specifically, the preset lower limit level is 20% of the height of the equalization tank 21.
[0058] In one embodiment, the start and stop of the drive structure can be controlled by a button.
[0059] In one embodiment, the movement position of the adjusting baffle 11 includes a first position, a second position, and a third position; the control platform 4 includes a timing unit, which is electrically connected to the drive structure, and the drive structure drives the adjusting baffle 11 to move to the first position, the second position, or the third position at regular intervals.
[0060] In one embodiment, when the driving structure drives the adjusting baffle 11 to the first position, the volume of the regulating pool 21 is at its minimum volume; when the driving structure drives the adjusting baffle 11 to the second position, the volume of the regulating pool 21 is at its maximum volume. When the driving structure drives the adjusting baffle 11 to the third position, the volume of the regulating pool 21 is greater than the minimum volume but less than the maximum volume. The distance between the adjusting baffle 11 and the designed position is shortest at the first position, and longest at the second position. Specifically, the third position is the designed position of the adjusting baffle 11. The ratio between the minimum volume and the designed volume of the regulating pool 21 is 0.6, and the ratio between the maximum volume and the designed volume of the regulating pool 21 is 1.5.
[0061] In one embodiment, the timing unit is configured with a first time period, a second time period, and a third time period. When the time is the first time period, the drive structure drives the adjusting baffle 11 to move to a first position; when the time is the second time period, the drive structure drives the adjusting baffle 11 to move to a second position; and when the time is the third time period, the drive structure drives the adjusting baffle 11 to move to a third position. Specifically, for example, the first time period is nighttime or off-peak hours, the second time period is holidays or peak traffic hours, and the third time period is other daily hours. The sum of the first, second, and third time periods covers the entire year. This application adapts to the water volume characteristics of the service area and solves the problem of decreased treatment efficiency when water volume fluctuates.
[0062] In one embodiment, this application optimizes the parameters of the regulating tank 21 to shorten the hydraulic residence time to 0.5 hours during off-peak hours and extend the hydraulic residence time to 2 hours during peak hours, thereby significantly reducing operating costs.
[0063] In one embodiment, such as Figure 1 As shown, the system also includes an MBR membrane tank 6, and the water treatment tank and the MBR membrane tank 6 are connected or separated by a first lift pump 81; the MBR membrane tank 6 is equipped with an ultraviolet catalytic structure and a membrane module 61.
[0064] In one embodiment, the ultraviolet LED lamp 62 in the ultraviolet catalytic structure is set on the top of the MBR membrane tank 6, and the catalyst is TiO2. The ultraviolet catalytic structure improves the degradation rate of oils and the inactivation rate of pathogens.
[0065] In one embodiment, an ultraviolet disinfection module is also provided in the MBR membrane tank 6, which is integrated into the effluent pipe of the MBR membrane tank 6 to ensure that the fecal coliform count is <100 CFU / L.
[0066] In one embodiment, the system further includes an electric heating device and a temperature sensing element; the electric heating device and the temperature sensing element are disposed in the MBR membrane tank 6.
[0067] In one embodiment, the electric heating device and the temperature detection element are electrically or wirelessly connected to the control platform 4. When the control platform 4 detects that the water temperature in the MBR membrane tank 6 is lower than the preset water temperature based on the temperature detection element, the control platform 4 controls the electric heating device to start heating the water in the MBR membrane tank 6. Specifically, the preset water temperature is 15°C. For low-temperature operation in northern service areas during winter, this application integrates an electric heating device and an ultraviolet catalytic structure. Under the premise of maintaining a water temperature not lower than 15°C, and in conjunction with the TiO2 photocatalytic reaction, it solves the problem of severe membrane fouling and a sharp drop in treatment efficiency in the MBR process during winter, and achieves stable and compliant wastewater discharge throughout the year. In this application, the grease degradation rate is increased by 40%, the pathogen inactivation rate is >99.9%, while the amount of chemical disinfectant used is reduced by 80%, forming a highly efficient and energy-saving closed-loop treatment system.
[0068] In one embodiment, such as Figure 1 As shown, the membrane module 61 in the MBR membrane tank 6 uses a PVDF hollow fiber membrane for solid-liquid separation. The system also includes an online turbidity meter, a transmembrane differential pressure sensor, and a flushing structure. These components are located in the MBR membrane tank 6 and are electrically or wirelessly connected to the control platform 4. When the control platform 4 determines that the membrane module 61 shows a tendency to foul based on feedback from the online turbidity meter and the transmembrane differential pressure sensor, it controls the flushing structure to flush the membrane module 61. The flushing cycle is 30 minutes, with a duration of 1 minute.
[0069] In one embodiment, the system further includes an online turbidity meter, a transmembrane differential pressure sensor, a control board, and a flushing structure. These components are located in the MBR membrane tank 6 and are electrically or wirelessly connected to the control board. When the feedback information from the online turbidity meter and the transmembrane differential pressure sensor is equal to or greater than a preset turbidity value or a preset differential pressure value, the flushing structure is automatically triggered to flush the membrane module 61. The flushing cycle is 30 minutes, with a duration of 1 minute.
[0070] In one embodiment, such as Figure 1 As shown, the water treatment tank includes an anoxic tank 23, an aerobic tank 24, and a reflux structure; the inlet of the reflux structure is located in the aerobic tank 24, and the outlet of the reflux structure is located in the anoxic tank 23.
[0071] In one embodiment, such as Figure 1 As shown, the reflux structure includes a reflux pump 9 and a pipeline connected to the inlet and outlet of the reflux pump 9. The inlet of the pipeline connected to the inlet of the reflux pump 9 is located in the aerobic tank 24, and the outlet of the pipeline connected to the outlet of the reflux pump 9 is located in the anoxic tank 23. The reflux structure is used to return the nitrified liquid in the aerobic tank 24 to the anoxic tank 23, utilizing the carbon source in the wastewater to complete denitrification.
[0072] In one embodiment, such as Figure 1 As shown, the effluent from the equalization tank 21 enters the anaerobic tank 22 via the first lift pump 81, with a hydraulic retention time set to 2 hours. A submersible mixer (30 rpm) is installed in the anaerobic tank 22, electrically connected to the control platform 4. The submersible mixer maintains the sludge concentration at 4000-5000 mg / L. The anaerobic tank 22 is used to complete the hydrolysis and acidification of complex organic matter, breaking down large organic molecules into smaller fatty acids, creating favorable conditions for subsequent treatment. A temperature sensor and an auxiliary heating device are also installed in the anaerobic tank 22, electrically connected to the control platform 4. The temperature sensor provides real-time feedback on the water temperature in the anaerobic tank 22, and the control platform 4 activates the auxiliary heating device when the temperature drops below 15℃.
[0073] In one embodiment, such as Figure 1As shown, the effluent from the anaerobic tank 22 flows by gravity through the top of the first baffle 12 into the anoxic tank 23. The designed hydraulic retention time of the anoxic tank 23 is 3 hours. The recirculation ratio of the recirculation structure is 200%. The nitrified liquid from the aerobic tank 24 is recirculated to the anoxic tank 23 through the recirculation structure, utilizing the carbon source in the wastewater to complete denitrification. An ORP online monitoring instrument (set value -50 to +50mV) is installed in the anoxic tank 23. The ORP online monitoring instrument and the control platform 4 are electrically connected. The control platform 4 dynamically adjusts the speed of the recirculation pump 9 according to the ORP value fed back by the ORP online monitoring instrument to ensure that the denitrification efficiency is stable at above 85%.
[0074] In one embodiment, such as Figure 1 As shown, the system also includes a blower 7, a first aeration assembly, and a second aeration assembly. The first aeration assembly is located in the aerobic tank 24, and the second aeration assembly is located in the MBR membrane tank 6. These components are used for aerobic treatment to promote the removal of organic matter and convert ammonia nitrogen into nitrate. The blower 7 is connected to the first and second aeration assemblies via blower pipes. The blower pipes include a main blower pipe, a first branch blower pipe, and a second branch blower pipe. Both the first and second branch blower pipes are connected to the main blower pipe. The first branch blower pipe is connected to the first aeration assembly, and the second branch blower pipe is connected to the second aeration assembly. A main blower valve 71 is located on the main blower pipe, and a first blower valve 72 is located on the first branch blower pipe. The main blower valve 71 controls the flow of air from the blower 7 to the first and second aeration assemblies, while the first blower valve 72 controls the flow of air from the blower 7 to the first aeration assembly. The first aeration assembly includes a first aeration pump 73, a first aeration disc, a first blower branch pipe connected to the first aeration pump 73, and the first aeration pump 73 connected to the first aeration disc. The second aeration assembly includes a second aeration pump 74, a second aeration disc, a second blower branch pipe connected to the second aeration pump 74, and the second aeration pump 74 connected to the second aeration disc. In this application, both the first and second aeration assemblies employ microporous aeration, achieving an oxygen utilization rate ≥30%.
[0075] In one embodiment, the effluent from the anoxic tank 23 enters the aerobic tank 24 through the bottom of the second baffle 13. A DO sensor is installed in the aerobic tank 24, and the DO sensor is electrically connected to the control platform 4. Based on feedback information from the DO sensor (accuracy ±0.1 mg / L), the control platform 4 outputs the first aeration pump 73 in real time via a frequency converter, precisely controlling the dissolved oxygen concentration within the range of 2.0-2.5 mg / L. The anoxic tank 23 is also used for organic matter degradation and ammonia nitrification, maintaining the sludge concentration at 3000-3500 mg / L.
[0076] In one embodiment, a DO sensor is also installed in the MBR membrane tank 6, and the DO sensor is electrically connected to the control platform 4. Based on the feedback information from the DO sensor (accuracy ±0.1 mg / L), the control platform 4 uses a frequency converter to control the output of the aeration pump in real time.
[0077] In one embodiment, a second lift pump 82 is installed in the aerobic tank 24, and the aerobic tank 24 is electrically connected to the control platform 4. The second lift pump 82 pumps water from the aerobic tank 24 into the MBR membrane tank 6.
[0078] In one embodiment, such as Figure 1 As shown, the system also includes a photovoltaic power generation device 5; the photovoltaic power generation device 5 is electrically connected to the drive structure, control platform 4, and electric heating device.
[0079] In one embodiment, the photovoltaic power generation device 5 is electrically connected to various electrical equipment, including the drive motor 31, the first lift pump 81, the second lift pump 82, the first aeration pump 73, the second aeration pump 74, the blower 7, the electric heating device, the auxiliary heating device, the reflux pump 9, and the control platform 4. The photovoltaic power generation device 5 prioritizes powering the drive motor 31 and various sensors, reducing energy consumption by 70%. The remaining power is used to power the electric heating device and the ultraviolet catalytic structure. Afterward, any remaining power is used to power the first lift pump 81, the second lift pump 82, the first aeration pump 73, the second aeration pump 74, the blower 7, the auxiliary heating device, and the reflux pump 9.
[0080] After the system in this application is applied, the frequency of operation and maintenance will be reduced from twice a day to twice a week in the traditional process, which is particularly suitable for the unattended needs of service areas in remote areas and greatly reduces management costs.
[0081] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.
[0082] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.
[0083] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A sewage treatment system for highway service areas, characterized in that, include: Equalization tank, water treatment tank, equalization baffle, drive structure, control platform; The regulating baffle is provided between the regulating tank and the water treatment tank. The driving structure is connected to the regulating baffle and electrically connected to the control platform. The driving structure drives the regulating baffle to move in order to adjust the volume of the regulating tank.
2. The sewage treatment system for a highway service area according to claim 1, characterized in that, Driven by the aforementioned drive structure, the system switches between a first operating mode, a second operating mode, and a third operating mode. In the first operating mode, the adjustment baffle is located in the designed position; In the second operating mode, the adjusting baffle moves relative to the designed position to reduce the volume of the adjusting pool; In the third operating mode, the adjusting baffle moves relative to the designed position to increase the volume of the adjusting pool.
3. A sewage treatment system for a highway service area according to claim 2, characterized in that, In the second or third operating mode, the distance relationship between the adjusting baffle and the designed position is as follows: Among them, D 挡板 Q is the distance between the adjusting baffle and the designed position, in meters (m). 实时 For real-time sewage volume, m 3 / h;Q 设计 To design the wastewater treatment capacity, m 3 / h;L 池长 The maximum length of the equalization tank is in meters (m).
4. A sewage treatment system for a highway service area according to claim 2, characterized in that, In the second or third operating mode, the distance relationship between the adjusting baffle and the designed position is as follows: Among them, D 挡板 Q is the distance between the adjusting baffle and the designed position, in meters (m). 车 Real-time traffic flow, vehicles / hour; α is the traffic flow coefficient, the product of per capita drainage and passenger capacity coefficient, L / vehicle / trip; Sservice area is the total area of catering and restrooms in the service area, m2; β is the drainage coefficient per unit area of the service area, L / m2 2 ·h; Q is the design wastewater treatment capacity, in meters. 3 / h; L is the maximum length of the equalization tank, in meters.
5. A sewage treatment system for a highway service area according to claim 1, characterized in that, The movement positions of the adjusting baffle include a first position, a second position, and a third position; The control platform includes a timing unit, which is electrically connected to the drive structure. The drive structure drives the adjusting baffle to move to the first position, the second position, or the third position at regular intervals.
6. A sewage treatment system for a highway service area according to claim 1, characterized in that, The system includes a liquid level detection device disposed in the regulating tank. The liquid level detection device is electrically connected to the control platform. The control platform is used to control the start and stop of the drive structure based on the feedback information from the liquid level detection device.
7. A sewage treatment system for a highway service area according to claim 1, characterized in that, The system also includes an MBR membrane tank, and the water treatment tank and the MBR membrane tank are connected or separated by a first lift pump. The MBR membrane cell is equipped with an ultraviolet catalytic structure.
8. A sewage treatment system for a highway service area according to claim 7, characterized in that, The system also includes an electric heating device and a temperature detection device; The electric heating device and the temperature detection element are installed in the MBR membrane tank.
9. A sewage treatment system for a highway service area according to claim 8, characterized in that, The system also includes a photovoltaic power generation device; The photovoltaic power generation device is electrically connected to the drive structure, the control platform, and the electric heating device.
10. A sewage treatment system for a highway service area according to claim 1, characterized in that, The water treatment tank includes an anoxic tank, an aerobic tank, and a reflux structure; The inlet of the reflux structure is located in the aerobic tank, and the outlet of the reflux structure is located in the anoxic tank.