Combined system overflow sewage treatment method and control system

Abstract

The invention relates to the field of urban pipe network overflow pollution treatment, in particular to a combined system overflow sewage treatment method and a control system. According to the technical scheme, the combined system overflow sewage treatment method and the control system comprise a specific combined system overflow sewage treatment method; compared with a traditional combined system overflow sewage treatment control system, a regulation and storage pool technology is mostly adopted, or an overflow pollution rapid treatment facility is applied for simple treatment, the regulation and storage pool technology has multiple defects and site limitation, and the operation working condition is difficult to control; in addition, due to the lack of an immobilized space structure and an intelligent control system, the optimal operation working condition of a regulation and storage tank is often difficult to master and copy, and the combined system overflow sewage treatment control system has the advantages that through the matched application of a core equipment rapid filtering device and an ecological sponge purification system; and double efficient purification of the pretreated overflow sewage is realized.

Description

Technical Field

[0001] The present invention relates to the field of urban pipe network overflow pollution treatment, and in particular to a combined sewer overflow sewage treatment method and control system. Background Art

[0002] With the rapid development of urbanization, urban water environment protection and waterlogging prevention are important tasks for cities. In my country's current drainage system, a large number of interception combined sewer systems are left. Such combined sewer facilities are basically located in the city center, and it is basically difficult to change or replace them. The combined system will be ubiquitous and exist for a long time, and it is characterized by being wide and dispersed. The urban non-point source pollution caused by the overflow of the drainage system on rainy days seriously affects the lives of citizens. The water quality of the river deteriorates sharply after heavy rains, which has become a prominent problem in water pollution control.

[0003] Existing combined sewer overflow treatment control systems mostly use regulating reservoir technology, or simple treatment using overflow pollution rapid treatment facilities. The regulating reservoir technology itself has many defects and site limitations, and the operating conditions are difficult to control: affected by external rainfall patterns, rainfall, and differences in the topological structure of drainage pipes, coupled with the lack of its own fixed spatial structure and intelligent control system, the optimal operating conditions of the regulating reservoir are often difficult to grasp and replicate.

[0004] In view of the problem that the existing combined sewer overflow sewage treatment control system is affected by the external rainfall type, rainfall and differences in the topological structure of the drainage pipes, and the lack of its own fixed spatial structure and intelligent control system, the optimal operating conditions of the regulating reservoir are often difficult to grasp and replicate. The combined sewer overflow sewage treatment control system realizes double efficient purification of the pre-treated overflow sewage through the combination of core equipment rapid filtration device and ecological sponge purification system, with SS removal rate of more than 85%, BOD5 removal rate of more than 60%, and obvious removal effect on ammonia nitrogen and soluble phosphorus. The overall effluent water quality can meet the requirements of Class IV surface water. Summary of the invention

[0005] In order to overcome the existing combined sewer overflow sewage treatment control system, the regulation and storage tank process is mostly adopted, or the overflow pollution rapid treatment facilities are used for simple treatment. The regulation and storage tank process itself has many defects and site limitations, and the operating conditions are difficult to control: affected by the external rainfall type, rainfall and drainage pipe topological structure differences, coupled with the lack of its own fixed spatial structure and intelligent control system, the optimal operating conditions of the regulation and storage tank are often difficult to grasp and replicate.

[0006] The technical solution of the present invention is: a combined sewer overflow sewage treatment method, comprising the following steps:

[0007] S11: First, intercept and pre-treat the overflow outlet of the combined sewer system to ensure that the overflow water can be effectively intercepted;

[0008] S12: introducing the pretreated sewage into the rapid filtering device for rapid filtering to ensure continuous and efficient operation of the equipment;

[0009] S13: Combine electrochemical, biological treatment and adsorption technologies to introduce sewage into the ecological sponge purification system for deep treatment;

[0010] S14: Use electromagnetic flowmeter and intelligent control system for monitoring and regulation, integrate online water quality monitoring and intelligent regulation technology to improve treatment effect;

[0011] S15: The central control system automates operation and maintenance based on data transmitted by various sensors to extend the service life of the equipment;

[0012] S16: Discharge and monitor wastewater treated by the rapid filtration device and ecological sponge purification system to ensure the safety of effluent water quality.

[0013] Preferably, the interception and pretreatment process includes the following steps:

[0014] S21: At the front end of the combined sewer overflow outlet, select a suitable location to install a retention well according to the urban drainage network layout and terrain conditions. The design of the retention well must ensure that it can effectively retain the overflow sewage in the network and facilitate subsequent operation and maintenance;

[0015] S22: activating the interception well to intercept the overflow sewage from the combined sewer pipe. Through the interception effect of the interception well, a large amount of sewage can be introduced into the subsequent treatment process, reducing the risk of sewage being directly discharged into the environment;

[0016] S23: introducing the sewage intercepted by the interception well into the sludge well, utilizing the natural sedimentation of the sludge well to remove the larger particles and sediments in the sewage, and regularly cleaning the sludge at the bottom of the sludge well to prevent excessive accumulation that affects the sedimentation effect or causes blockage;

[0017] S24: A screen is installed after the sludge pit to further intercept fine suspended matter in the sewage. When the sewage passes through the screen, the bars of the screen will intercept the suspended matter and prevent it from entering the subsequent treatment facilities;

[0018] S25: Clean the suspended matter on the grille regularly to keep the grille unobstructed and filter effective.

[0019] Preferably, when performing the rapid filtration process, the following steps are included:

[0020] S31: The pretreated sewage is introduced into the water inlet of the rapid filtration device through a pipeline, and the electromagnetic flowmeter A set at the water inlet of the rapid filtration device starts to monitor the water inlet data, including the flow rate and flow velocity, to ensure that the amount of water entering the device is within the processing capacity of the device;

[0021] S32: The sewage first enters chamber 1 of the rapid filtration device, in which a filter screen is provided to further filter the suspended matter remaining in the sewage, and the filter screen is used to intercept fine particles;

[0022] S33: The sewage after preliminary filtration enters the second chamber, which is filled with high-flux filter material. The high-flux filter material can quickly filter suspended matter and organic matter in the sewage with its high specific surface area and high-efficiency filtration capacity;

[0023] S34: The sewage continues to flow through chamber three, in which a fiber bundle filler is installed. The fiber bundle filler is used to further filter the suspended matter in the sewage and improve the effluent quality;

[0024] S35: During the operation of the rapid filtration device, the liquid level sensor arranged on the inner wall of chamber one continuously monitors the sewage level. When the filter material is blocked and the sewage flow rate is reduced, the sewage level in chamber one will gradually increase. When the liquid level sensor detects that the sewage level reaches a preset threshold, the information is transmitted to the central control module, and the central control module instructs to start the filter material backwashing system to backwash the filter material in chamber two;

[0025] S36: The sewage treated by the rapid filtration device enters the water outlet, and the water quality detector A installed at the water outlet detects the water quality of the treated sewage. If the water quality meets the discharge requirements, it is directly discharged; if it does not meet the standards, the central control module instructs to open the electric gate valve B installed at the water inlet of the ecological sponge purification system, and introduces the sewage that does not meet the standards into the ecological sponge purification system for deep treatment.

[0026] Preferably, when performing deep treatment of ecological sponge purification, the following steps are included:

[0027] S41: Before the sewage treated by the rapid filtration device enters the ecological sponge purification system, it is first tested by a water quality detector A arranged at the outlet of the rapid filtration device;

[0028] S42: If the water quality detector A shows that the water quality has reached the discharge requirements, it is directly discharged; if it does not reach the standards, the next step of deep treatment is carried out;

[0029] S43: When it is determined that deep treatment is required, the central control module instructs to open the electric gate valve B set at the water inlet end of the ecological sponge purification system to allow substandard sewage to enter the ecological sponge purification system;

[0030] S44: The electromagnetic flowmeter B installed at the water inlet of the ecological sponge purification system starts to monitor the water inlet data, including the flow rate and flow velocity, to ensure that the amount of water entering the system is within the system processing capacity;

[0031] S45: The sewage enters the chamber 1 of the ecological sponge purification system, and a filter is provided in the chamber to further filter the suspended matter remaining in the sewage;

[0032] S46: The sewage after preliminary filtration enters chamber 2, which is filled with iron-carbon fillers and carrier-immobilized microbial fillers. The iron-carbon fillers decompose and remove pollutants through electrochemical reactions, while the carrier-immobilized microbial fillers continuously release microbial agents into the water body for nitrification, denitrification and denitrification processes;

[0033] S47: Sewage enters chamber three to replenish dissolved oxygen to meet the needs of subsequent biological treatment;

[0034] S48: The sewage enters chamber 4, which is filled with lanthanum-iron composite phosphorus removal filler and autotrophic-heterotrophic denitrification filler. The lanthanum-iron composite phosphorus removal filler is used to remove phosphorus from the sewage, while the autotrophic-heterotrophic denitrification filler further removes nitrogen from the sewage through biological action;

[0035] S49: The sewage after deep denitrification and phosphorus removal treatment enters chamber five, which is a stabilization zone used to further stabilize the water quality and ensure that the effluent water quality meets the requirements.

[0036] Preferably, when performing the monitoring and control process of the intelligent control system, the following steps are included:

[0037] S51: After the sewage is deeply treated by the ecological sponge purification system, it is first tested by a water quality detector B set at the water outlet of the ecological sponge purification system;

[0038] S52: The water quality detector B monitors various indicators in the effluent water in real time to ensure that the effluent water quality meets the preset discharge standard or specific water quality requirements;

[0039] S53: If the test result of the water quality detector B shows that the effluent water quality meets the standard, the central control module instructs to open the discharge gate valve to allow the treated sewage to be directly discharged into the environmental water body or subsequent treatment facilities. If the effluent water quality does not meet the standard, the next step of the control process is entered;

[0040] S54: When the effluent quality does not meet the standard, the central control module automatically instructs to open the electric gate valve on the return pipe to return the substandard sewage to the front-end rapid filtering device, and the return sewage is filtered again in the rapid filtering device to further remove suspended matter and some soluble pollutants;

[0041] S55: After the return sewage is processed by the rapid filtration device, it is tested again by the water quality detector A set at the outlet of the rapid filtration device. If the water quality still does not meet the standard, the return treatment continues; if the water quality meets the standard, according to the system settings, it can be directly discharged or enter the ecological sponge purification system again for deep treatment to ensure the stability of the effluent water quality;

[0042] S56: The intelligent control system continuously monitors the operating status of each functional area. When the system detects any abnormal situation or equipment failure, it immediately triggers the early warning mechanism to notify the operator to conduct inspection and maintenance;

[0043] S57: The intelligent control system automatically adjusts the operating parameters of each functional area according to preset parameters and real-time monitoring data. At the same time, the system can automatically adjust the residence time and treatment strategy of sewage in the ecological sponge purification system according to changes in the treatment scenario.

[0044] Preferably, during the automated operation and maintenance, the following steps are included:

[0045] S61: The intelligent control system continuously monitors the key parameters of the entire sewage treatment process, including the water flow rate of each functional area, water quality indicators and the liquid level in the rapid filtration device;

[0046] S62: When the electromagnetic flowmeter detects that the water flow exceeds the equipment processing capacity, the central control module automatically closes the corresponding electric gate valve to prevent the equipment from overloading;

[0047] S63: The water quality detector A monitors the effluent quality of the rapid filtration device. If it does not meet the standard, the electric gate valve B at the water inlet of the ecological sponge purification system is automatically opened to introduce the sewage into the deep treatment; at the same time, the water quality detector B monitors the effluent quality of the ecological sponge purification system. If it does not meet the standard, the return system is instructed to be opened to return the sewage to the rapid filtration device for further treatment;

[0048] S64: When the liquid level sensor detects that the filter material in the rapid filtration device is clogged and causes the liquid level to rise, the central control module automatically starts the backwash system to clean the filter material to restore its filtration capacity. A mud discharge channel is provided at the bottom of the rapid filtration device. According to the operating time and sediment accumulation, the mud discharge valve is opened regularly or as needed to discharge the sediment;

[0049] S65: The aeration and reoxygenation zone in the ecological sponge purification system automatically adjusts the aeration volume according to the dissolved oxygen demand to ensure the activity of microorganisms. The carrier-immobilized microbial filler continuously releases microbial agents. The central control system can monitor the microbial activity indicators and supplement or replace the filler when necessary.

[0050] S66: The intelligent control system performs self-inspection on each device regularly, and the operator performs equipment maintenance based on the system warning information;

[0051] S67: Based on long-term operating data and effluent water quality feedback, the central control system can automatically adjust the treatment strategy, or manually adjust the system settings to adapt to sewage treatment needs in different seasons and weather conditions.

[0052] Preferably, the following steps are included when discharging and monitoring the effluent:

[0053] S71: The water quality detector A performs water quality detection on the sewage treated by the rapid filtration device. If the water quality meets the preset discharge standard, the next discharge step is directly entered;

[0054] S72: The central control module automatically determines that the water quality does not meet the standard based on the data of the water quality detector A, and instructs the opening of the electric gate valve B at the water inlet end of the ecological sponge purification system to introduce the substandard sewage into the ecological sponge purification system for deep treatment;

[0055] S73: After the sewage enters the ecological sponge purification system, it passes through the electrochemical reaction zone, aeration and reoxygenation zone, and denitrification and phosphorus removal zone to perform deep denitrification and phosphorus removal and pollutant removal. The water quality detector B performs a final water quality test on the sewage treated by the ecological sponge purification system. If the water quality meets the preset discharge standard, it enters the discharge step;

[0056] S74: When the water quality detector B shows that the water quality meets the standard, the central control module instructs to open the discharge gate valve to discharge the treated sewage to the designated discharge point or water body. The system automatically records the data information and generates a discharge report for the management personnel to review and audit;

[0057] S75: If the water quality detector B shows that the water quality still does not meet the standard, the central control module will instruct to start the reflux system to return the unqualified sewage to the front-end rapid filtration device for further treatment until the water quality meets the standard;

[0058] S76: During the backflow treatment, the system should automatically perform troubleshooting to find out the cause of the substandard water quality and make repairs in a timely manner. After the repair is completed, the water quality test and discharge process should be repeated.

[0059] Preferably, a combined sewer overflow sewage treatment control system comprises:

[0060] Terminal control module: It consists of a central control module and a data acquisition module, and is used to provide data support and control for the control system;

[0061] Instruction execution module: It consists of an execution control module and a monitoring alarm module, and is used to receive data from the terminal control module and perform execution operations on the processing control system.

[0062] Preferably, the terminal control module includes a central control module and a data acquisition module. The central control module is used to receive data from various sensors, and perform data processing and decision-making according to preset logic and algorithms, control the opening and closing of various actuators, so as to realize automatic control of the sewage treatment process, and monitor the operating status of the entire system at the same time, promptly discover and handle abnormal situations, and ensure the stable operation of the system. The data acquisition module is composed of an electromagnetic flowmeter A, an electromagnetic flowmeter B, a water quality detector A, a water quality detector B and a liquid level sensor. The electromagnetic flowmeter A is arranged at the water inlet end of the rapid filtration device to monitor the amount of sewage entering the rapid filtration device. The electromagnetic flowmeter B is arranged at the water inlet end of the ecological sponge purification system to monitor the amount of sewage entering the ecological sponge purification system. The water quality detector A is arranged at the water outlet end of the rapid filtration device to detect the water quality of the sewage treated by the rapid filtration device. The water quality detector B is arranged at the water outlet end of the ecological sponge purification system to detect the water quality of the sewage treated by the ecological sponge purification system. The liquid level sensor is arranged in the chamber of the rapid filtration device to indicate the blockage of the filter material and monitor the sewage level in chamber one.

[0063] Preferably, the instruction execution module includes an execution control module and a monitoring and alarm module. The execution control module is composed of an electric gate valve A, an electric gate valve B, a pump, an aerator and a backwashing system. The electric gate valve A is arranged at the water inlet end of the rapid filtration device to control the sewage flow entering the rapid filtration device. The electric gate valve B is arranged at the water inlet end of the ecological sponge purification system to control the sewage flow entering the ecological sponge purification system. The pump and the aerator are used to realize the sewage transportation and aeration treatment process. The backwashing system is arranged in the rapid filtration device for backwashing the filter material to prevent the filter material from being blocked. The monitoring and alarm module is used to monitor the operating status of the entire system in real time. When the system is abnormal or fails, an alarm signal is issued in time to remind the operator to handle it. At the same time, the system's operating data and alarm information are recorded and saved to provide a basis for subsequent troubleshooting and performance analysis.

[0064] Beneficial effects of the present invention:

[0065] 1. Compared with the traditional combined sewer overflow sewage treatment control system, most of them adopt the regulation and storage tank process, or use the overflow pollution rapid treatment facilities for simple treatment. The regulation and storage tank process itself has many defects and site limitations, and the operating conditions are difficult to control: affected by the external rainfall type, rainfall and drainage pipe topological structure differences, coupled with the lack of its own fixed spatial structure and intelligent control system, the optimal operating conditions of the regulation and storage tank are often difficult to grasp and replicate. The combined sewer overflow sewage treatment control system realizes dual efficient purification of the pre-treated overflow sewage through the combination of the core equipment rapid filtration device and the ecological sponge purification system, with a SS removal rate of more than 85%, a BOD5 removal rate of more than 60%, and a significant removal effect on ammonia nitrogen and dissolved phosphorus. The overall effluent water quality can meet the requirements of Class IV surface water;

[0066] 2. Through the matching application of the core equipment rapid filtration device and the ecological sponge purification system, the pre-treated overflow sewage can be subjected to dual efficient purification, with an SS removal rate of more than 85%, a BOD5 removal rate of more than 60%, and obvious removal effects on ammonia nitrogen and soluble phosphorus. The overall effluent quality can meet the requirements of Class IV surface water. The central control module can adjust the operating parameters of each functional area according to different application scenarios to meet the comprehensive treatment of sewage in the combined sewage interception main pipe on sunny days and overflow sewage from the combined sewage interception main pipe on rainy days. At the same time, the present invention occupies a small area, has low site requirements, low maintenance costs, and can be flexibly selected for decentralized applications. It is suitable for the current situation where the combined overflow pollution is wide and decentralized. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 Shown is a schematic diagram of the interception and pretreatment process of a combined sewer overflow sewage treatment method of the present invention;

[0068] Figure 2 Shown is a schematic diagram of a rapid filtration treatment process of a combined sewer overflow sewage treatment method of the present invention;

[0069] Figure 3 Shown is a schematic diagram of an ecological sponge purification deep treatment process of a combined sewer overflow sewage treatment method of the present invention;

[0070] Figure 4 Shown is a schematic diagram of the monitoring and regulation process of an intelligent control system for a combined overflow sewage treatment method of the present invention. DETAILED DESCRIPTION

[0071] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0072] See also Figure 1-Figure 4 The present invention provides an embodiment: a combined sewer overflow sewage treatment method, comprising the following steps:

[0073] S11: First, intercept and pre-treat the overflow outlet of the combined sewer system to ensure that the overflow water can be effectively intercepted;

[0074] S12: introducing the pretreated sewage into the rapid filtering device for rapid filtering to ensure continuous and efficient operation of the equipment;

[0075] S13: Combine electrochemical, biological treatment and adsorption technologies to introduce sewage into the ecological sponge purification system for deep treatment;

[0076] S14: Use electromagnetic flowmeter and intelligent control system for monitoring and regulation, integrate online water quality monitoring and intelligent regulation technology to improve treatment effect;

[0077] S15: The central control system automates operation and maintenance based on data transmitted by various sensors to extend the service life of the equipment;

[0078] S16: Discharge and monitor wastewater treated by the rapid filtration device and ecological sponge purification system to ensure the safety of effluent water quality.

[0079] Preferably, the interception and pretreatment process includes the following steps:

[0080] S21: At the front end of the combined sewer overflow outlet, select a suitable location to install a retention well according to the urban drainage network layout and terrain conditions. The design of the retention well must ensure that it can effectively retain the overflow sewage in the network and facilitate subsequent operation and maintenance;

[0081] S22: activating the interception well to intercept the overflow sewage from the combined sewer pipe. Through the interception effect of the interception well, a large amount of sewage can be introduced into the subsequent treatment process, reducing the risk of sewage being directly discharged into the environment;

[0082] S23: introducing the sewage intercepted by the interception well into the sludge well, utilizing the natural sedimentation of the sludge well to remove the larger particles and sediments in the sewage, and regularly cleaning the sludge at the bottom of the sludge well to prevent excessive accumulation that affects the sedimentation effect or causes blockage;

[0083] S24: A screen is installed after the sludge pit to further intercept fine suspended matter in the sewage. When the sewage passes through the screen, the bars of the screen will intercept the suspended matter and prevent it from entering the subsequent treatment facilities;

[0084] S25: Clean the suspended matter on the grille regularly to keep the grille unobstructed and filter effective.

[0085] Preferably, when performing the rapid filtration process, the following steps are included:

[0086] S31: The pretreated sewage is introduced into the water inlet of the rapid filtration device through a pipeline, and the electromagnetic flowmeter A set at the water inlet of the rapid filtration device starts to monitor the water inlet data, including the flow rate and flow velocity, to ensure that the amount of water entering the device is within the processing capacity of the device;

[0087] S32: The sewage first enters chamber 1 of the rapid filtration device, in which a filter screen is provided to further filter the suspended matter remaining in the sewage, and the filter screen is used to intercept fine particles;

[0088] S33: The sewage after preliminary filtration enters the second chamber, which is filled with high-flux filter material. The high-flux filter material can quickly filter suspended matter and organic matter in the sewage with its high specific surface area and high-efficiency filtration capacity;

[0089] S34: The sewage continues to flow through chamber three, in which a fiber bundle filler is installed. The fiber bundle filler is used to further filter the suspended matter in the sewage and improve the effluent quality;

[0090] S35: During the operation of the rapid filtration device, the liquid level sensor arranged on the inner wall of chamber one continuously monitors the sewage level. When the filter material is blocked and the sewage flow rate is reduced, the sewage level in chamber one will gradually increase. When the liquid level sensor detects that the sewage level reaches a preset threshold, the information is transmitted to the central control module, and the central control module instructs to start the filter material backwashing system to backwash the filter material in chamber two;

[0091] S36: The sewage treated by the rapid filtration device enters the water outlet, and the water quality detector A installed at the water outlet detects the water quality of the treated sewage. If the water quality meets the discharge requirements, it is directly discharged; if it does not meet the standards, the central control module instructs to open the electric gate valve B installed at the water inlet of the ecological sponge purification system, and introduces the sewage that does not meet the standards into the ecological sponge purification system for deep treatment.

[0092] Preferably, when performing deep treatment of ecological sponge purification, the following steps are included:

[0093] S41: Before the sewage treated by the rapid filtration device enters the ecological sponge purification system, it is first tested by a water quality detector A arranged at the outlet of the rapid filtration device;

[0094] S42: If the water quality detector A shows that the water quality has reached the discharge requirements, it is directly discharged; if it does not reach the standards, the next step of deep treatment is carried out;

[0095] S43: When it is determined that deep treatment is required, the central control module instructs to open the electric gate valve B set at the water inlet end of the ecological sponge purification system to allow substandard sewage to enter the ecological sponge purification system;

[0096] S44: The electromagnetic flowmeter B installed at the water inlet of the ecological sponge purification system starts to monitor the water inlet data, including the flow rate and flow velocity, to ensure that the amount of water entering the system is within the system processing capacity;

[0097] S45: The sewage enters the chamber 1 of the ecological sponge purification system, and a filter is provided in the chamber to further filter the suspended matter remaining in the sewage;

[0098] S46: The sewage after preliminary filtration enters chamber 2, which is filled with iron-carbon fillers and carrier-immobilized microbial fillers. The iron-carbon fillers decompose and remove pollutants through electrochemical reactions, while the carrier-immobilized microbial fillers continuously release microbial agents into the water body for nitrification, denitrification and denitrification processes;

[0099] S47: Sewage enters chamber three to replenish dissolved oxygen to meet the needs of subsequent biological treatment;

[0100] S48: The sewage enters chamber 4, which is filled with lanthanum-iron composite phosphorus removal filler and autotrophic-heterotrophic denitrification filler. The lanthanum-iron composite phosphorus removal filler is used to remove phosphorus from the sewage, while the autotrophic-heterotrophic denitrification filler further removes nitrogen from the sewage through biological action;

[0101] S49: The sewage after deep denitrification and phosphorus removal treatment enters chamber five, which is a stabilization zone used to further stabilize the water quality and ensure that the effluent water quality meets the requirements.

[0102] Preferably, when performing the monitoring and control process of the intelligent control system, the following steps are included:

[0103] S51: After the sewage is deeply treated by the ecological sponge purification system, it is first tested by a water quality detector B set at the water outlet of the ecological sponge purification system;

[0104] S52: The water quality detector B monitors various indicators in the effluent water in real time to ensure that the effluent water quality meets the preset discharge standard or specific water quality requirements;

[0105] S53: If the test result of the water quality detector B shows that the effluent water quality meets the standard, the central control module instructs to open the discharge gate valve to allow the treated sewage to be directly discharged into the environmental water body or subsequent treatment facilities. If the effluent water quality does not meet the standard, the next step of the control process is entered;

[0106] S54: When the effluent quality does not meet the standard, the central control module automatically instructs to open the electric gate valve on the return pipe to return the substandard sewage to the front-end rapid filtering device, and the return sewage is filtered again in the rapid filtering device to further remove suspended matter and some soluble pollutants;

[0107] S55: After the return sewage is processed by the rapid filtration device, it is tested again by the water quality detector A set at the outlet of the rapid filtration device. If the water quality still does not meet the standard, the return treatment continues; if the water quality meets the standard, according to the system settings, it can be directly discharged or enter the ecological sponge purification system again for deep treatment to ensure the stability of the effluent water quality;

[0108] S56: The intelligent control system continuously monitors the operating status of each functional area. When the system detects any abnormal situation or equipment failure, it immediately triggers the early warning mechanism to notify the operator to conduct inspection and maintenance;

[0109] S57: The intelligent control system automatically adjusts the operating parameters of each functional area according to preset parameters and real-time monitoring data. At the same time, the system can automatically adjust the residence time and treatment strategy of sewage in the ecological sponge purification system according to changes in the treatment scenario.

[0110] Preferably, during the automated operation and maintenance, the following steps are included:

[0111] S61: The intelligent control system continuously monitors the key parameters of the entire sewage treatment process, including the water flow rate of each functional area, water quality indicators and the liquid level in the rapid filtration device;

[0112] S62: When the electromagnetic flowmeter detects that the water flow exceeds the equipment processing capacity, the central control module automatically closes the corresponding electric gate valve to prevent the equipment from overloading;

[0113] S63: The water quality detector A monitors the effluent quality of the rapid filtration device. If it does not meet the standard, the electric gate valve B at the water inlet of the ecological sponge purification system is automatically opened to introduce the sewage into the deep treatment; at the same time, the water quality detector B monitors the effluent quality of the ecological sponge purification system. If it does not meet the standard, the return system is instructed to be opened to return the sewage to the rapid filtration device for further treatment;

[0114] S64: When the liquid level sensor detects that the filter material in the rapid filtration device is clogged and causes the liquid level to rise, the central control module automatically starts the backwash system to clean the filter material to restore its filtration capacity. A mud discharge channel is provided at the bottom of the rapid filtration device. According to the operating time and sediment accumulation, the mud discharge valve is opened regularly or as needed to discharge the sediment;

[0115] S65: The aeration and reoxygenation zone in the ecological sponge purification system automatically adjusts the aeration volume according to the dissolved oxygen demand to ensure the activity of microorganisms. The carrier-immobilized microbial filler continuously releases microbial agents. The central control system can monitor the microbial activity indicators and supplement or replace the filler when necessary.

[0116] S66: The intelligent control system performs self-inspection on each device regularly, and the operator performs equipment maintenance based on the system warning information;

[0117] S67: Based on long-term operating data and effluent water quality feedback, the central control system can automatically adjust the treatment strategy, or manually adjust the system settings to adapt to sewage treatment needs in different seasons and weather conditions.

[0118] Preferably, the following steps are included when discharging and monitoring the effluent:

[0119] S71: The water quality detector A performs water quality detection on the sewage treated by the rapid filtration device. If the water quality meets the preset discharge standard, the next discharge step is directly entered;

[0120] S72: The central control module automatically determines that the water quality does not meet the standard based on the data of the water quality detector A, and instructs the opening of the electric gate valve B at the water inlet end of the ecological sponge purification system to introduce the substandard sewage into the ecological sponge purification system for deep treatment;

[0121] S73: After the sewage enters the ecological sponge purification system, it passes through the electrochemical reaction zone, aeration and reoxygenation zone, and denitrification and phosphorus removal zone to perform deep denitrification and phosphorus removal and pollutant removal. The water quality detector B performs a final water quality test on the sewage treated by the ecological sponge purification system. If the water quality meets the preset discharge standard, it enters the discharge step;

[0122] S74: When the water quality detector B shows that the water quality meets the standard, the central control module instructs to open the discharge gate valve to discharge the treated sewage to the designated discharge point or water body. The system automatically records the data information and generates a discharge report for the management personnel to review and audit;

[0123] S75: If the water quality detector B shows that the water quality still does not meet the standard, the central control module will instruct to start the reflux system to return the unqualified sewage to the front-end rapid filtration device for further treatment until the water quality meets the standard;

[0124] S76: During the backflow treatment, the system should automatically perform troubleshooting to find out the cause of the substandard water quality and make repairs in a timely manner. After the repair is completed, the water quality test and discharge process should be repeated.

[0125] Preferably, a combined sewer overflow sewage treatment control system comprises:

[0126] Terminal control module: It consists of a central control module and a data acquisition module, and is used to provide data support and control for the control system;

[0127] Instruction execution module: It consists of an execution control module and a monitoring alarm module, and is used to receive data from the terminal control module and perform execution operations on the processing control system.

[0128] Preferably, the terminal control module includes a central control module and a data acquisition module. The central control module is used to receive data from various sensors, and perform data processing and decision-making according to preset logic and algorithms, control the opening and closing of various actuators, so as to realize automatic control of the sewage treatment process, and monitor the operating status of the entire system at the same time, promptly discover and handle abnormal situations, and ensure the stable operation of the system. The data acquisition module is composed of an electromagnetic flowmeter A, an electromagnetic flowmeter B, a water quality detector A, a water quality detector B and a liquid level sensor. The electromagnetic flowmeter A is arranged at the water inlet end of the rapid filtration device to monitor the amount of sewage entering the rapid filtration device. The electromagnetic flowmeter B is arranged at the water inlet end of the ecological sponge purification system to monitor the amount of sewage entering the ecological sponge purification system. The water quality detector A is arranged at the water outlet end of the rapid filtration device to detect the water quality of the sewage treated by the rapid filtration device. The water quality detector B is arranged at the water outlet end of the ecological sponge purification system to detect the water quality of the sewage treated by the ecological sponge purification system. The liquid level sensor is arranged in the chamber of the rapid filtration device to indicate the blockage of the filter material and monitor the sewage level in chamber one.

[0129] Preferably, the instruction execution module includes an execution control module and a monitoring and alarm module. The execution control module is composed of an electric gate valve A, an electric gate valve B, a pump, an aerator and a backwashing system. The electric gate valve A is arranged at the water inlet end of the rapid filtration device to control the sewage flow entering the rapid filtration device. The electric gate valve B is arranged at the water inlet end of the ecological sponge purification system to control the sewage flow entering the ecological sponge purification system. The pump and the aerator are used to realize the sewage transportation and aeration treatment process. The backwashing system is arranged in the rapid filtration device for backwashing the filter material to prevent the filter material from being blocked. The monitoring and alarm module is used to monitor the operating status of the entire system in real time. When the system is abnormal or fails, an alarm signal is issued in time to remind the operator to handle it. At the same time, the system's operating data and alarm information are recorded and saved to provide a basis for subsequent troubleshooting and performance analysis.

[0130] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A combined sewer overflow sewage treatment method, characterized in that: The following steps are included: S11: First, intercept and pre-treat the overflow outlet of the combined sewer system to ensure that the overflow water can be effectively intercepted; S12: introducing the pretreated sewage into the rapid filtering device for rapid filtering to ensure continuous and efficient operation of the equipment; S13: Combine electrochemical, biological treatment and adsorption technologies to introduce sewage into the ecological sponge purification system for deep treatment; S14: Use electromagnetic flowmeter and intelligent control system for monitoring and regulation, integrate online water quality monitoring and intelligent regulation technology to improve treatment effect; S15: The central control system automates operation and maintenance based on data transmitted by various sensors to extend the service life of the equipment; S16: Discharge and monitor wastewater treated by the rapid filtration device and ecological sponge purification system to ensure the safety of effluent water quality.

2. A combined sewer overflow sewage treatment method according to claim 1, characterized in that: When conducting interception and pretreatment, the following steps are included: S21: At the front end of the combined sewer overflow outlet, select a suitable location to install a retention well according to the urban drainage network layout and terrain conditions. The design of the retention well must ensure that it can effectively retain the overflow sewage in the network and facilitate subsequent operation and maintenance; S22: activating the interception well to intercept the overflow sewage from the combined sewer pipe. Through the interception effect of the interception well, a large amount of sewage can be introduced into the subsequent treatment process, reducing the risk of sewage being directly discharged into the environment; S23: introducing the sewage intercepted by the interception well into the sludge well, utilizing the natural sedimentation of the sludge well to remove the larger particles and sediments in the sewage, and regularly cleaning the sludge at the bottom of the sludge well to prevent excessive accumulation that affects the sedimentation effect or causes blockage; S24: A screen is installed after the sludge pit to further intercept fine suspended matter in the sewage. When the sewage passes through the screen, the bars of the screen will intercept the suspended matter and prevent it from entering the subsequent treatment facilities; S25: Clean the suspended matter on the grille regularly to keep the grille unobstructed and filter effective.

3. A combined sewer overflow sewage treatment method according to claim 1, characterized in that: When performing rapid filtration processing, the following steps are included: S31: The pretreated sewage is introduced into the water inlet of the rapid filtration device through a pipeline, and the electromagnetic flowmeter A set at the water inlet of the rapid filtration device starts to monitor the water inlet data, including the flow rate and flow velocity, to ensure that the amount of water entering the device is within the processing capacity of the device; S32: The sewage first enters chamber 1 of the rapid filtration device, in which a filter screen is provided to further filter the suspended matter remaining in the sewage, and the filter screen is used to intercept fine particles; S33: The sewage after preliminary filtration enters the second chamber, which is filled with high-flux filter material. The high-flux filter material can quickly filter suspended matter and organic matter in the sewage with its high specific surface area and high-efficiency filtration capacity; S34: The sewage continues to flow through chamber three, in which a fiber bundle filler is installed. The fiber bundle filler is used to further filter the suspended matter in the sewage and improve the effluent quality; S35: During the operation of the rapid filtration device, the liquid level sensor arranged on the inner wall of chamber one continuously monitors the sewage level. When the filter material is blocked and the sewage flow rate is reduced, the sewage level in chamber one will gradually increase. When the liquid level sensor detects that the sewage level reaches a preset threshold, the information is transmitted to the central control module, and the central control module instructs to start the filter material backwashing system to backwash the filter material in chamber two; S36: The sewage treated by the rapid filtration device enters the water outlet, and the water quality detector A installed at the water outlet detects the water quality of the treated sewage. If the water quality meets the discharge requirements, it is directly discharged; if it does not meet the standards, the central control module instructs to open the electric gate valve B installed at the water inlet of the ecological sponge purification system, and introduces the sewage that does not meet the standards into the ecological sponge purification system for deep treatment.

4. A combined sewer overflow sewage treatment method according to claim 1, characterized in that: When conducting deep treatment of ecological sponge purification, the following steps are included: S41: Before the sewage treated by the rapid filtration device enters the ecological sponge purification system, it is first tested by a water quality detector A arranged at the outlet of the rapid filtration device; S42: If the water quality detector A shows that the water quality has reached the discharge requirements, it is directly discharged; if it does not reach the standards, the next step of deep treatment is carried out; S43: When it is determined that deep treatment is required, the central control module instructs to open the electric gate valve B set at the water inlet end of the ecological sponge purification system to allow substandard sewage to enter the ecological sponge purification system; S44: The electromagnetic flowmeter B installed at the water inlet of the ecological sponge purification system starts to monitor the water inlet data, including the flow rate and flow velocity, to ensure that the amount of water entering the system is within the system processing capacity; S45: The sewage enters the chamber 1 of the ecological sponge purification system, and a filter is provided in the chamber to further filter the suspended matter remaining in the sewage; S46: The sewage after preliminary filtration enters chamber 2, which is filled with iron-carbon fillers and carrier-immobilized microbial fillers. The iron-carbon fillers decompose and remove pollutants through electrochemical reactions, while the carrier-immobilized microbial fillers continuously release microbial agents into the water body for nitrification, denitrification and denitrification processes; S47: Sewage enters chamber three to replenish dissolved oxygen to meet the needs of subsequent biological treatment; S48: The sewage enters chamber 4, which is filled with lanthanum-iron composite phosphorus removal filler and autotrophic-heterotrophic denitrification filler. The lanthanum-iron composite phosphorus removal filler is used to remove phosphorus from the sewage, while the autotrophic-heterotrophic denitrification filler further removes nitrogen from the sewage through biological action; S49: The sewage after deep denitrification and phosphorus removal treatment enters chamber five, which is a stabilization zone used to further stabilize the water quality and ensure that the effluent water quality meets the requirements.

5. A combined sewer overflow sewage treatment method according to claim 1, characterized in that: When conducting intelligent control system monitoring and regulation processing, the following steps are included: S51: After the sewage is deeply treated by the ecological sponge purification system, it is first tested by a water quality detector B set at the water outlet of the ecological sponge purification system; S52: The water quality detector B monitors various indicators in the effluent water in real time to ensure that the effluent water quality meets the preset discharge standard or specific water quality requirements; S53: If the test result of the water quality detector B shows that the effluent water quality meets the standard, the central control module instructs to open the discharge gate valve to allow the treated sewage to be directly discharged into the environmental water body or subsequent treatment facilities. If the effluent water quality does not meet the standard, the next step of the control process is entered; S54: When the effluent quality does not meet the standard, the central control module automatically instructs to open the electric gate valve on the return pipe to return the substandard sewage to the front-end rapid filtering device, and the return sewage is filtered again in the rapid filtering device to further remove suspended matter and some soluble pollutants; S55: After the return sewage is processed by the rapid filtration device, it is tested again by the water quality detector A set at the outlet of the rapid filtration device. If the water quality still does not meet the standard, the return treatment continues; if the water quality meets the standard, according to the system settings, it can be directly discharged or enter the ecological sponge purification system again for deep treatment to ensure the stability of the effluent water quality; S56: The intelligent control system continuously monitors the operating status of each functional area. When the system detects any abnormal situation or equipment failure, it immediately triggers the early warning mechanism to notify the operator to conduct inspection and maintenance; S57: The intelligent control system automatically adjusts the operating parameters of each functional area according to preset parameters and real-time monitoring data. At the same time, the system can automatically adjust the residence time and treatment strategy of sewage in the ecological sponge purification system according to changes in the treatment scenario.

6. A combined sewer overflow sewage treatment method according to claim 1, characterized in that: When performing automated operation and maintenance, the following steps are included: S61: The intelligent control system continuously monitors the key parameters of the entire sewage treatment process, including the water flow rate of each functional area, water quality indicators and the liquid level in the rapid filtration device; S62: When the electromagnetic flowmeter detects that the water flow exceeds the equipment processing capacity, the central control module automatically closes the corresponding electric gate valve to prevent the equipment from overloading; S63: The water quality detector A monitors the effluent quality of the rapid filtration device. If it does not meet the standard, the electric gate valve B at the water inlet of the ecological sponge purification system is automatically opened to introduce the sewage into the deep treatment; at the same time, the water quality detector B monitors the effluent quality of the ecological sponge purification system. If it does not meet the standard, the return system is instructed to be opened to return the sewage to the rapid filtration device for further treatment; S64: When the liquid level sensor detects that the filter material in the rapid filtration device is clogged and causes the liquid level to rise, the central control module automatically starts the backwash system to clean the filter material to restore its filtration capacity. A mud discharge channel is provided at the bottom of the rapid filtration device. According to the operating time and sediment accumulation, the mud discharge valve is opened regularly or as needed to discharge the sediment; S65: The aeration and reoxygenation zone in the ecological sponge purification system automatically adjusts the aeration volume according to the dissolved oxygen demand to ensure the activity of microorganisms. The carrier-immobilized microbial filler continuously releases microbial agents. The central control system can monitor the microbial activity indicators and supplement or replace the filler when necessary. S66: The intelligent control system performs self-inspection on each device regularly, and the operator performs equipment maintenance based on the system warning information; S67: Based on long-term operating data and effluent water quality feedback, the central control system can automatically adjust the treatment strategy, or manually adjust the system settings to adapt to sewage treatment needs in different seasons and weather conditions.

7. A combined sewer overflow sewage treatment method according to claim 1, characterized in that: When conducting effluent discharge and monitoring, the following steps are included: S71: The water quality detector A performs water quality detection on the sewage treated by the rapid filtration device. If the water quality meets the preset discharge standard, the next discharge step is directly entered; S72: The central control module automatically determines that the water quality does not meet the standard based on the data of the water quality detector A, and instructs the opening of the electric gate valve B at the water inlet end of the ecological sponge purification system to introduce the substandard sewage into the ecological sponge purification system for deep treatment; S73: After the sewage enters the ecological sponge purification system, it passes through the electrochemical reaction zone, aeration and reoxygenation zone, and denitrification and phosphorus removal zone to perform deep denitrification and phosphorus removal and pollutant removal. The water quality detector B performs a final water quality test on the sewage treated by the ecological sponge purification system. If the water quality meets the preset discharge standard, it enters the discharge step; S74: When the water quality detector B shows that the water quality meets the standard, the central control module instructs to open the discharge gate valve to discharge the treated sewage to the designated discharge point or water body. The system automatically records the data information and generates a discharge report for the management personnel to review and audit; S75: If the water quality detector B shows that the water quality still does not meet the standard, the central control module will instruct to start the reflux system to return the unqualified sewage to the front-end rapid filtration device for further treatment until the water quality meets the standard; S76: During the backflow treatment, the system should automatically perform troubleshooting to find out the cause of the substandard water quality and make repairs in a timely manner. After the repair is completed, the water quality test and discharge process should be repeated.

8. A combined sewer overflow treatment method according to claims 1-7, characterized in that: A combined sewer overflow sewage treatment control system, comprising: Terminal control module: It consists of a central control module and a data acquisition module, and is used to provide data support and control for the control system; Instruction execution module: It consists of an execution control module and a monitoring alarm module, and is used to receive data from the terminal control module and perform execution operations on the processing control system.

9. A combined sewer overflow treatment control system according to claim 8, characterized in that: The terminal control module includes a central control module and a data acquisition module. The central control module is used to receive data from various sensors, and perform data processing and decision-making according to preset logic and algorithms, control the opening and closing of various actuators, so as to realize the automatic control of the sewage treatment process, and monitor the operation status of the entire system at the same time, timely discover and handle abnormal situations, and ensure the stable operation of the system. The data acquisition module is composed of an electromagnetic flowmeter A, an electromagnetic flowmeter B, a water quality detector A, a water quality detector B and a liquid level sensor. The electromagnetic flowmeter A is set at the water inlet end of the rapid filtration device to monitor the amount of sewage entering the rapid filtration device. The electromagnetic flowmeter B is set at the water inlet end of the ecological sponge purification system to monitor the amount of sewage entering the ecological sponge purification system. The water quality detector A is set at the water outlet end of the rapid filtration device to detect the water quality of the sewage treated by the rapid filtration device. The water quality detector B is set at the water outlet end of the ecological sponge purification system to detect the water quality of the sewage treated by the ecological sponge purification system. The liquid level sensor is set in the chamber of the rapid filtration device to indicate the clogging of the filter material and monitor the sewage level in chamber one.

10. A combined sewer overflow treatment control system according to claim 8, characterized in that: The instruction execution module includes an execution control module and a monitoring and alarm module. The execution control module is composed of an electric gate valve A, an electric gate valve B, a pump, an aerator and a backwashing system. The electric gate valve A is arranged at the water inlet end of the rapid filtration device to control the sewage flow entering the rapid filtration device. The electric gate valve B is arranged at the water inlet end of the ecological sponge purification system to control the sewage flow entering the ecological sponge purification system. The pump and the aerator are used to realize the sewage transportation and aeration treatment process. The backwashing system is arranged in the rapid filtration device for backwashing the filter material to prevent the filter material from being blocked. The monitoring and alarm module is used to monitor the operating status of the entire system in real time. When the system is abnormal or fails, an alarm signal is issued in time to remind the operator to handle it. At the same time, the system's operating data and alarm information are recorded and saved to provide a basis for subsequent troubleshooting and performance analysis.

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