CN220367290U - Rural domestic sewage treatment facility running state on-line monitoring system - Google Patents
Rural domestic sewage treatment facility running state on-line monitoring system Download PDFInfo
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Abstract
The utility model discloses an on-line monitoring system for the running state of rural domestic sewage treatment facilities, which comprises a sensor, a sewage treatment facility monitoring terminal, an AI camera, a cloud server, a sewage treatment facility, a flowmeter and a current sensing device, wherein the sensor is connected with the AI camera; the sensor is arranged at a water inlet and a water outlet of the sewage treatment facility and is electrically connected with a monitoring terminal of the sewage treatment facility; the sewage treatment facility monitoring terminal processes the water quality data acquired by the sensor, generates a report and sends the report to the cloud server, and the AI camera and the sewage treatment facility monitoring terminal interact with the cloud server through the communication unit and the wireless network, so that the running state of rural domestic sewage treatment facilities is checked, abnormal automatic alarm, video and image monitoring site live condition is realized, and the environments such as water quality up to standard condition, water quality color, plant greening, growth and the like are monitored and analyzed statistically.
Description
Technical Field
The utility model belongs to the technical field of rural domestic sewage treatment facility monitoring, and particularly relates to an online monitoring system for the running state of a rural domestic sewage treatment facility.
Background
The urban treatment domestic sewage has special municipal sewage pipe network, the urban population is densely populated, and the average cost for uniformly treating the urban domestic sewage by constructing the sewage pipe network to a sewage treatment plant is low and the benefit is high. But rural households are wide in distribution, the distance between households is long, and domestic sewage is collected and treated uniformly in a mode of building a sewage pipe network, so that the cost is extremely high and the benefit is low. Therefore, at present, villages are taken as units in rural areas, and each village is built with a small-sized domestic sewage treatment facility for purifying the village sewage and then discharging the village sewage after reaching the standard.
Rural domestic sewage treatment facilities are generally divided into a power type and an unpowered type, the power type mainly performs water quality purification through equipment such as a filter membrane, an external power supply is required to support the equipment to operate, the filter membrane is manually replaced, daily inspection is required in the later period, manual sampling is required to perform laboratory detection on the water quality purification effect, and the facility operation and maintenance management difficulty is high, the cost is high and professionals are deficient. The unpowered type sewage treatment device mainly comprises the steps that after domestic sewage is treated in a physical precipitation mode, an artificial wetland treatment mode and the like, solid particles are removed through precipitation, water quality is purified by microorganisms and plants in the artificial wetland, and electric and mechanical equipment is not needed, but the purification effect of the microorganisms and the plants cannot be effectively monitored.
At present, the monitoring method in the industry is to monitor two indexes of COD and ammonia nitrogen in water inlet and outlet of rural domestic sewage treatment facilities by installing automatic monitoring equipment to check whether the sewage treatment facilities are in normal operation; the automatic monitoring equipment detects water quality index's mode has two kinds: one is a chemical reagent method, which requires periodic replenishment of reagents, and the reagent lines may be blocked, the switching valves may be damaged, and a large amount of electricity is required, which has the advantage of high accuracy, and is basically consistent with the principle of a laboratory detection method. The other is the sensor detection method. The Chinese patent with publication number CN211179783U discloses a rural sewage information processing monitoring system, which mainly detects sewage at different positions of a water outlet through a position adjusting component, and the Chinese patent with publication number CN216337157U discloses an intelligent control system of a rural sewage treatment device based on an embedded system, which solves the problem of difficult maintenance cost of sewage treatment caused by decentralized residents in rural areas through cooperative control of three modules, mainly aims at improving sewage treatment, but cannot monitor on-site conditions such as water quality statistical analysis standard reaching of sewage treatment facilities, plant greening and the like.
Therefore, aiming at the problems existing in the prior art, it is highly needed to provide an on-line monitoring system for the running state of rural domestic sewage treatment facilities, so as to solve the problem that the running state of the rural domestic sewage treatment facilities cannot be monitored due to the reasons of high operation and maintenance management difficulty, high cost, lack of professionals and the like of the rural domestic sewage treatment facilities.
Disclosure of Invention
Aiming at the problems in the related art, the utility model provides an on-line monitoring system for the running state of rural domestic sewage treatment facilities. The system is mainly used for monitoring the running state of rural domestic sewage treatment facilities, monitoring the running state of the treatment facilities and distributing operation and maintenance tasks in real time, and remotely monitoring the water quality and water quantity of water entering and exiting each rural domestic sewage treatment facility, the running state of the sewage treatment facilities, abnormal automatic alarm, video and image monitoring site live condition, and statistically analyzing the site conditions such as water quality up to standard, water quality color, plant greening, growth vigor and the like.
The technical scheme of the utility model is realized as follows:
the rural domestic sewage treatment facility running state on-line monitoring system comprises a sensor, a sewage treatment facility monitoring terminal, an AI camera, a cloud server, a sewage treatment facility, a flowmeter and a current sensing device;
the sewage treatment facility purifies sewage through one or a combination of more of an aerobic tank, an anaerobic tank, an artificial wetland and a filter membrane;
the sensors are arranged at a water inlet and a water outlet of the sewage treatment facility, are used for acquiring water quality data and are transmitted to a sewage treatment facility monitoring terminal;
the sewage treatment facility monitoring terminal comprises a main controller, an interface, a power supply and a communication unit; the power source may be an ACDC power source;
the AI cameras monitor the environments of a water outlet and a water inlet of the sewage treatment facility and the environments of the sewage treatment facility and a monitoring terminal of the sewage treatment facility, acquire field pictures and send the field pictures to the cloud server through the communication unit;
the interface is connected with the sensor and the AI camera; the power supply supplies energy to the main controller and the communication unit; the communication unit is used for being in communication connection with the cloud server, and the main controller is used for receiving data acquired by the sensor and the AI camera and sending the data to the cloud server through the communication unit;
the cloud server is used for receiving data sent by the sewage treatment facility monitoring terminal and displaying the data in real time through the display terminal.
The main controller generates an out-of-standard report, an analysis chart and the like according to the water quality data acquired by the sensor and sends the out-of-standard report, the analysis chart and the like to the cloud server; simultaneously storing water quality data and water quality parameters in a sewage treatment facility monitoring terminal; the cloud server is used for receiving data sent by the sewage treatment facility monitoring terminal, processing the picture data, comparing plant growth states, plant growth vigor and water quality colors in the picture with preset thresholds, acquiring plant area information and water quality information, and displaying the plant area information and the water quality information in real time through the display terminal, wherein the display terminal can be a display.
Preferably, the AI camera comprises a facility global management and control camera, a water inlet and a water outlet camera, the facility global management and control camera shoots a picture of the global area of the sewage treatment facility monitoring terminal, and the water inlet and the water outlet camera shoots a picture of the water inlet and the water outlet of the sewage treatment facility; the AI cameras monitor the environments of the water inlet and the water outlet of the sewage treatment facility and the environment of the sewage treatment facility monitoring terminal, acquire picture data and send the picture data to the cloud server through the communication unit.
Preferably, the sensor comprises a COD sensor, an ammonia nitrogen sensor, a pH sensor and a temperature sensor; the COD sensor is used for monitoring the content of organic pollutants in water, the ammonia nitrogen sensor is used for monitoring the concentration of ammonium ions in water, the pH sensor is used for monitoring the pH value of water, and the temperature sensor is used for monitoring the temperature of water.
Preferably, the communication unit comprises an antenna and a communication chip, the communication chip is electrically connected with the main controller, the communication chip is communicated with the electric wire, the communication chip can be a 4G chip, and the antenna can be a 4G antenna and is used for carrying out information interaction with the cloud server.
Preferably, the interface comprises a 485MODBUS interface, a USB interface and a TTL interface.
Preferably, the sewage treatment facility monitoring terminal further comprises a voice horn and a touch screen, wherein the voice horn and the touch screen are respectively electrically connected with the main controller, the voice horn can send out early warning reminding when the water quality data exceeds the standard, and the touch screen is convenient for manually operating the sewage treatment facility monitoring terminal on site.
Preferably, a liquid level sensor is arranged in the flowmeter, is communicated with a water outlet of the sewage treatment facility, and is electrically connected with the main controller through an interface; the flowmeter automatically calculates the flow according to the determined cross section area of the water outlet and the liquid level height, and uploads the flow to the cloud server, and according to the flow and the flow speed, the running state of the sewage treatment facility can be monitored by combining indexes such as water quality data, parameters and the like.
The current sensing device is arranged on a power line of electric equipment of the sewage treatment facility, if the power line has current to pass through, the current sensing device generates a signal and transmits the signal to a sewage treatment facility monitoring terminal, and the feedback electric equipment is in a working state.
Preferably, the solar cell panel is arranged outside the sewage treatment facility monitoring terminal, a battery pack is further arranged in the sewage treatment facility monitoring terminal, and the solar cell panel is electrically connected with the battery pack. The solar panel stores electric quantity in a battery pack, the voltage of the battery pack is smaller than the rated voltage of a sewage treatment facility monitoring terminal, the main controller is switched to power supply, the power supply is ACDC power supply, the voltage of the battery pack is larger than the rated voltage of the sewage treatment facility monitoring terminal, and the main controller is switched to power supply of the battery pack; the solar power supply system and the alternating current power supply are adopted to automatically switch, so that normal operation in rainy days and rainy days can be ensured.
Preferably, the sensor further comprises a radar flow rate sensor and a radar water level sensor, and the flow rate and the water level are acquired through a radar to monitor the running condition of the sewage treatment facility.
Preferably, the sewage treatment facility monitoring terminal is provided with a human body sensor, and the human body sensor is electrically connected with the main controller. The human body sensor is equipped, and when a human body approaches, the camera is automatically triggered to take a picture and report, and the inspection condition of personnel is monitored.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model provides an on-line monitoring system for the running state of rural domestic sewage treatment facilities, which is provided with an AI camera and a cloud server, and sends on-site pictures to the cloud server through a communication unit, so that the running state of the rural domestic sewage treatment facilities, abnormal automatic alarm, video and image monitoring on-site live condition, statistical analysis of the water quality up to standard condition, water quality color, plant greening, growth and other environments are monitored. The monitoring system has the advantages of simple site construction, low cost, large-area popularization, adoption of the sensor for monitoring the water quality condition in real time, no need of using chemical reagents, simple operation and maintenance, regular self-inspection and cleaning of equipment every day, timely discovery and maintenance of faults, complete unattended operation for 1-3 months, automatic switching of the solar power supply system and the alternating current power supply, and guarantee of normal operation in overcast and rainy days for 15 days.
Drawings
FIG. 1 is a schematic connection diagram of an on-line monitoring system for the running state of rural domestic sewage treatment facilities.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Examples
As shown in fig. 1, the rural domestic sewage treatment facility running state on-line monitoring system comprises a sensor, a sewage treatment facility monitoring terminal, an AI camera, a cloud server, a sewage treatment facility, a flowmeter and a current sensing device;
the sewage is purified by an anaerobic tank, an aerobic tank and an artificial wetland, an electric equipment lifting pump is arranged between the anaerobic tank and the aerobic tank, and the sewage in the anaerobic tank is transferred to the aerobic tank in a preset time;
the sensors are arranged at the water inlet and the water outlet of the sewage treatment facility and are used for acquiring water quality data and transmitting the water quality data to the sewage treatment facility monitoring terminal; respectively monitoring water quality data at a water inlet and a water outlet of a sewage treatment facility, wherein the water inlet concentration is used for evaluating the collection condition of a pipe network, and the water outlet concentration is used for evaluating treatment effects; the general monitoring frequency is 1-2 times/day, the monitoring can be performed at any time according to a background command, the full-automatic timing sampling monitoring can be performed on the water quality sampling mode, the semi-automatic sampling monitoring can be performed, namely, the manual intervention operation is performed, no chemical reagent is needed, no secondary pollution is caused, the operation and maintenance are simple, and the full unattended operation can be realized for 1-3 months;
the sensor comprises a COD sensor, an ammonia nitrogen sensor, a pH sensor, a temperature sensor, a radar flow rate sensor and a radar water level sensor;
the COD sensor is used for monitoring the content of organic pollutants in water, and many organic matters dissolved in water have an absorption effect on ultraviolet light. Therefore, by measuring the absorption degree of the organic matters to 254nm wavelength ultraviolet light, the content of the dissolved organic pollutants in the water can be accurately measured. Two paths of light sources are adopted, one path of ultraviolet light is used for measuring COD content in water, the other path of reference light is used for measuring turbidity of water, and in addition, the attenuation of a light path is compensated through a specific algorithm and the interference of particulate suspended matter impurities can be eliminated to a certain extent, so that more stable and reliable measurement is realized;
the ammonia nitrogen sensor is used for monitoring the concentration of ammonium ions in water, the ammonium ions penetrate through the electrode surface selective membrane to generate potential difference, and the concentration of the ammonium ions is calculated through a Nernst equation;
the pH sensor is used for monitoring the pH value of water, is commonly called as a pH probe and consists of a glass electrode and a reference electrode. The glass electrode consists of a glass support rod, a glass film, an inner reference solution, an inner reference electrode, an electrode cap, an electric wire and the like. The reference electrode has a known and constant electrode potential, commonly a calomel electrode or a silver/silver chloride electrode. Because the pH value is related to the temperature, a temperature electrode is generally added for temperature compensation to form a tripolar composite electrode, a hydrogen ion glass electrode and a reference electrode form a primary cell, and the hydrogen ion concentration in the solution is detected by measuring the potential difference between the electrodes in the ion exchange process of the glass film and the hydrogen ions in the solution to be measured, so that the pH value of the liquid to be measured is measured;
the temperature sensor is used for monitoring the temperature of water quality, the temperature sensor is provided with a temperature probe, the temperature probe mainly reflects the degree of object heat, the temperature probe is divided into contact measurement and non-contact measurement in a temperature measurement mode, a hot spot effect is generated through the thermal resistance sensor, and the thermal resistance sensor is the most commonly used temperature sensor at medium and low temperatures, namely the temperature probe;
the sensor also comprises a radar flow velocity sensor and a radar water level sensor, and the flow velocity and the water level are acquired through a radar to monitor the running condition of the sewage treatment facility.
Aiming at the complex rural domestic sewage matrix, the large difference between the water inlet concentration and the water outlet concentration of the treatment facility, the monitoring equipment needs to be maintained as little as possible, is maintenance-free, has wide monitoring range and can not influence the surrounding environment, and the water quality monitoring method adopting the sensor has the characteristics of no chemical reagent, economy and durability, long maintenance period, wide monitoring range and the like.
In addition, the parameters of monitoring water level, dissolved oxygen, conductivity, turbidity and the like can be increased.
The sewage treatment facility monitoring terminal comprises a main controller, an interface, a power supply and a communication unit; the device also comprises a human body sensor, a voice loudspeaker, a touch screen, a solar panel and a battery pack; the interface comprises a 485MODBUS interface, a USB interface and a TTL interface; the communication unit comprises an antenna and a communication chip, the communication chip is communicated with the antenna, the communication chip can be a 4G chip, and the antenna is a 4G antenna and is used for carrying out information interaction with the cloud server; the power supply is an ACDC power supply; the main controller is electrically connected with the interface, the ACDC power supply, the 4G chip, the human body sensor, the voice loudspeaker and the touch screen;
the main controller generates an out-of-standard report, an analysis chart and the like according to the water quality data acquired by the sensor and sends the out-of-standard report, the analysis chart and the like to the cloud server; simultaneously storing water quality data and water quality parameters in a sewage treatment facility monitoring terminal;
the sewage treatment facility monitoring terminal is provided with a solar cell panel, and a battery pack is arranged in the sewage treatment facility monitoring terminal and is electrically connected with the solar cell panel. The solar panel stores electric quantity in a battery pack, the voltage of the battery pack is smaller than the rated voltage of a sewage treatment facility monitoring terminal, the main controller is switched to power supply, the power supply is ACDC power supply, the voltage of the battery pack is larger than the rated voltage of the sewage treatment facility monitoring terminal, and the main controller is switched to power supply of the battery pack; the solar power supply system and the alternating current power supply are adopted to automatically switch, so that normal operation in rainy days and overcast days can be ensured;
the 4G antenna is electrically connected with the 4G chip and used for carrying out information interaction with the cloud server; the voice horn and the touch screen are respectively and electrically connected with the main controller, the voice horn can send out early warning and reminding when the water quality data exceeds the standard, and the touch screen is convenient for manually operating the sewage treatment facility monitoring terminal on site.
The flow meter is internally provided with a liquid level sensor for monitoring the liquid level height, automatically calculates the flow according to the determined cross section area of the water outlet and the liquid level height, uploads the flow to the cloud server, and can monitor the running state of the sewage treatment facility according to the flow and the flow velocity and by combining the indexes such as water quality data, parameters and the like.
The human body sensor is electrically connected with the main controller. The human body sensor is equipped, and when a human body approaches, the camera is automatically triggered to take a picture and report, and the inspection condition of personnel is monitored.
The AI cameras monitor the environments of a water outlet and a water inlet of the sewage treatment facility, the artificial wetland, the sewage treatment facility and a monitoring terminal of the sewage treatment facility, acquire field pictures and send the field pictures to the cloud server through the communication unit; the AI cameras comprise facility universe management and control cameras, a water inlet and a water outlet camera, wherein the facility universe management and control cameras shoot pictures of the universe of a sewage treatment facility monitoring terminal, the pictures are sent to the cloud server through a communication unit, and the water inlet and the water outlet cameras shoot pictures of the water inlet and the water outlet of the sewage treatment facility, and the pictures are sent to the cloud server through the communication unit;
the interface is connected with the sensor and the AI camera; the power supply supplies energy to the main controller and the communication unit; the communication unit is used for carrying out communication connection with the cloud server, and the main controller is used for receiving data acquired by the sensor and the AI camera and sending the data to the cloud server through the communication unit;
the cloud server is used for receiving data sent by the sewage treatment facility monitoring terminal, processing the picture data, comparing plant growth states, plant growth vigor and water quality colors in the picture with preset thresholds, acquiring plant area information and water quality information, and displaying the plant area information and the water quality information in real time through the display terminal, wherein the display terminal can be a display.
The specific monitoring process of the rural domestic sewage treatment facility running state on-line monitoring system is as follows:
the sensor acquires water quality data from a water inlet and a water outlet of the sewage treatment facility and transmits the water quality data to a monitoring terminal of the sewage treatment facility;
the sewage treatment facility monitoring terminal processes the water quality data acquired by the sensor, the main controller compares the water quality data acquired by the sensor with a water quality data threshold range to generate chart information, and if the water quality data exceeds the water quality data threshold range, an alarm report is generated and sent to the cloud server at the same time;
the AI cameras monitor the environments of a water outlet and a water inlet of the sewage treatment facility, the artificial wetland, the sewage treatment facility and a monitoring terminal of the sewage treatment facility, take field pictures and send the field pictures to the cloud server through the communication unit;
the cloud server is used for receiving data sent by the sewage treatment facility monitoring terminal, processing the picture data, comparing plant growth states, plant growth vigor and water quality colors in the picture with preset thresholds, acquiring plant area information and water quality information and displaying the plant area information and the water quality information in real time through the display terminal.
Through rural domestic sewage treatment facility running state on-line monitoring system, set up AI camera and cloud server, send the scene picture to handle with cloud server through communication unit, can statistical analysis quality of water condition up to standard, monitor environments such as quality of water colour, plant afforestation and growth vigor. The running condition of the sewage treatment facility can be monitored by calculating the water flow through the flowmeter and combining with the camera, and the system has simple site construction and low cost and can be popularized in a large area; the system also comprises an abnormal automatic alarm, a video and image monitoring site live condition is adopted, a sensor method is used for detecting that no chemical reagent is needed, the operation and maintenance are simple, the solar power supply system and the alternating current power supply are in two modes, the automatic switching can be realized, and the system is environment-friendly and energy-saving.
Variations and modifications to the above would be obvious to persons skilled in the art to which the utility model pertains from the foregoing description and teachings. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the utility model should be also included in the scope of the claims of the utility model. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present utility model in any way.
Claims (10)
1. The rural domestic sewage treatment facility running state on-line monitoring system is characterized by comprising a sensor, a sewage treatment facility monitoring terminal, an AI camera, a cloud server, a sewage treatment facility, a flowmeter and a current sensing device;
the sewage treatment facility purifies sewage through one or a combination of more of an aerobic tank, an anaerobic tank, an artificial wetland and a filter membrane;
the sensors are arranged at a water inlet and a water outlet of the sewage treatment facility, are used for acquiring water quality data and are transmitted to a sewage treatment facility monitoring terminal;
the sewage treatment facility monitoring terminal comprises a main controller, an interface, a power supply and a communication unit;
the AI cameras monitor the environments of a water outlet and a water inlet of the sewage treatment facility and the environments of the sewage treatment facility and a monitoring terminal of the sewage treatment facility, acquire field pictures and send the field pictures to the cloud server through the communication unit;
the interface is connected with the sensor and the AI camera; the power supply supplies energy to the main controller and the communication unit; the communication unit is used for being in communication connection with the cloud server, and the main controller is used for receiving data acquired by the sensor and the AI camera and sending the data to the cloud server through the communication unit;
the cloud server is used for receiving data sent by the sewage treatment facility monitoring terminal and displaying the data in real time through the display terminal.
2. The on-line monitoring system for the operation state of rural domestic sewage treatment facilities according to claim 1, wherein the AI cameras comprise facility universe management cameras, a water inlet and a water outlet cameras, the facility universe management cameras take pictures of universe of sewage treatment facility monitoring terminals, and the water inlet and the water outlet cameras take pictures of water inlet and water outlet of the sewage treatment facility.
3. The on-line monitoring system for the operation state of rural domestic sewage treatment facilities according to claim 1, wherein the sensor comprises a COD sensor, an ammonia nitrogen sensor, a pH sensor and a temperature sensor; the COD sensor is used for monitoring the content of organic pollutants in water, the ammonia nitrogen sensor is used for monitoring the concentration of ammonium ions in water, the pH sensor is used for monitoring the pH value of water, and the temperature sensor is used for monitoring the temperature of water.
4. The on-line monitoring system for the operation state of rural domestic sewage treatment facilities according to claim 1, wherein the communication unit comprises an antenna and a communication chip, the communication chip is electrically connected with the main controller, and the communication chip is communicated with the electric wire.
5. The on-line monitoring system for the operation state of rural domestic sewage treatment facilities according to claim 4, wherein said interfaces comprise a 485MODBUS interface, a USB interface and a TTL interface.
6. The on-line monitoring system for the operation state of rural domestic sewage treatment facilities according to claim 4, wherein the sewage treatment facility monitoring terminal further comprises a voice horn and a touch screen, and the voice horn and the touch screen are respectively and electrically connected with the main controller.
7. The on-line monitoring system for the running state of rural domestic sewage treatment facilities according to claim 1, wherein a liquid level sensor is arranged in the flowmeter, is communicated with a water outlet of the sewage treatment facilities, and is electrically connected with the main controller through an interface;
the current sensing device is arranged on a power line of electric equipment of the sewage treatment facility, if the power line has current to pass through, the current sensing device generates a signal and transmits the signal to a sewage treatment facility monitoring terminal, and the feedback electric equipment is in a working state.
8. The on-line monitoring system for the operation state of rural domestic sewage treatment facilities according to claim 1, wherein a solar panel is arranged outside the sewage treatment facility monitoring terminal, a battery pack is further arranged in the sewage treatment facility monitoring terminal, and the solar panel is electrically connected with the battery pack.
9. The rural domestic sewage treatment facility operation status on-line monitoring system according to claim 1, wherein: the sensor also includes a radar flow rate sensor and a radar water level sensor.
10. The rural domestic sewage treatment facility operation status on-line monitoring system according to claim 1, wherein: the sewage treatment facility monitoring terminal is provided with a human body sensor, and the human body sensor is electrically connected with the main controller.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321978435.4U CN220367290U (en) | 2023-07-26 | 2023-07-26 | Rural domestic sewage treatment facility running state on-line monitoring system |
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| CN202321978435.4U CN220367290U (en) | 2023-07-26 | 2023-07-26 | Rural domestic sewage treatment facility running state on-line monitoring system |
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| CN220367290U true CN220367290U (en) | 2024-01-19 |
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| CN202321978435.4U Active CN220367290U (en) | 2023-07-26 | 2023-07-26 | Rural domestic sewage treatment facility running state on-line monitoring system |
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