A sewage treatment system and method

Abstract

A sewage treatment system and method, comprising a pretreatment unit, a biological treatment unit, and a deep treatment unit connected in sequence. The biological treatment unit includes a biological reaction tank and a secondary sedimentation tank connected by a conveying pipeline; the secondary sedimentation tank is divided into multiple sedimentation areas from the center to the edge: sedimentation area one, sedimentation area two, and sedimentation area three; the secondary sedimentation tank includes a sludge scraping board and a sludge discharge pipe for discharging the sedimented sludge. The sludge scraping board scrapes the sedimented sludge in sedimentation area one, sedimentation area two, and sedimentation area three respectively, and introduces the sedimented sludge in sedimentation area one and sedimentation area three into the sludge treatment unit through the sludge suction port, and introduces the sedimented sludge in sedimentation area two into the biological reaction tank. According to the differences in the sludge sedimentation performance in different sedimentation areas, the present invention collects the sludge in zones, improves the sludge concentration in the returned sludge and the proportion of microorganisms with excellent biochemical performance; through continuous screening of the sludge in zones, a microbial population with a fast sedimentation rate and excellent biochemical performance is obtained, improving the effluent quality.

Description

Technical Field

[0001] The present invention relates to the field of sewage treatment, and particularly to a sewage treatment system and method. Background Art

[0002] At present, the general overall process route of sewage treatment technology is pretreatment + secondary treatment + advanced treatment. Among them, the secondary treatment is the most important process section, generally mainly biological treatment. Biological treatment uses the pollutants contained in the sewage as nutrients, and utilizes the metabolic action of microorganisms to degrade the pollutants, so that the sewage is purified. At present, activated sludge process and biofilm process are generally adopted in biological treatment, and the activated sludge process accounts for more than 85%. The secondary treatment generally includes a biological reaction tank and a secondary sedimentation tank. The biological reaction tank is the main place for pollutant removal, and the secondary sedimentation tank separates the mud and water. The supernatant is discharged to the advanced treatment stage, and a part of the bottom sludge is refluxed to the biological reaction tank to maintain the microorganism concentration in the biological reaction tank and ensure the treatment effect, and a part is sent to the sludge treatment system as surplus sludge.

[0003] The process flow of the activated sludge process is relatively simple, but there are also many control parameters and influencing factors in its operation, and it is easily affected by factors such as filamentous bacteria bulking, scum and foam, sludge floating, and insufficient proportion of nitrifying bacteria in the activated sludge, ultimately affecting the effluent quality. In short, the quantity, state and quality of microorganisms in the biological reaction tank are the key to the success or failure of sewage treatment effect. And the source of microorganisms in the biological reaction tank comes from the reflux sludge of the secondary sedimentation tank, so the quality of the reflux sludge of the secondary sedimentation tank is particularly important.

[0004] At present, the main forms of the secondary sedimentation tanks equipped with the activated sludge process are circular radial flow secondary sedimentation tanks, rectangular radial flow secondary sedimentation tanks and rectangular horizontal flow secondary sedimentation tanks. No matter which kind of secondary sedimentation tank, the current reflux sludge adopts the method of collecting and refluxing and discharging the sedimented sludge on the entire bottom surface without distinction. In this way, there is an inherent defect that there is no separate collection and reflux according to the different sedimentation performance and microbial activity of the sludge, resulting in many problems such as large reflux volume, low quality of reflux sludge, and inconvenient operation and management of the biological reaction tank, which is not conducive to the exertion of sewage treatment efficiency, resulting in unstable water treatment effect and difficult to meet the increasingly strict discharge standards.

[0005] In addition, when scraping the sedimented sludge in the existing secondary sedimentation tank, there will always be dead corners where the sedimented sludge accumulates. When the time of the sedimented sludge accumulated in the sludge removal dead corner exceeds a certain time limit, the accumulated sludge will undergo anaerobic metabolism, generating a large amount of gases such as H2S and CH4 wrapped on the mud blocks, promoting the sludge to float up in large chunks, and at the same time, it will also produce a foul smell, seriously affecting the water treatment quality of the secondary sedimentation tank.

[0006] Therefore, the problems existing in the prior art need to be further improved and developed. Summary of the Invention

[0007] (1) Object of the Invention: To solve the problems existing in the above-mentioned prior art, the object of the present invention is to provide a sewage treatment system and method capable of partitioning and refluxing the sludge in the secondary sedimentation tank.

[0008] (2) Technical Solution: To solve the above technical problems, the present technical solution provides a sewage treatment system, including a pretreatment unit, a biological treatment unit, a deep treatment unit, and an intelligent control center connected in sequence. The biological treatment unit includes a biological reaction tank and a secondary sedimentation tank connected by a conveying pipeline;

[0009] The secondary sedimentation tank is divided into multiple sludge sedimentation areas from the center to the edge: sludge sedimentation area one, sludge sedimentation area two, and sludge sedimentation area three. The secondary sedimentation tank includes a sludge scraper, a sludge discharge pipe for discharging the precipitated sludge, and N sludge decay monitoring devices arranged in the secondary sedimentation tank. The sludge scraper includes a scraper for area one, a scraper for area two, and a scraper for area three. The scraper for area one is in contact with the bottom surface of the sludge sedimentation area one of the secondary sedimentation tank, the scraper for area two is in contact with the bottom surface of the sludge sedimentation area two of the secondary sedimentation tank, and the scraper for area three is in contact with the bottom surface of the sludge sedimentation area three of the secondary sedimentation tank;

[0010] The sludge discharge pipe includes a sludge reflux pipeline and a sludge discharge pipeline. Suction ports are respectively arranged on the scraper for area one, the scraper for area two, and the scraper for area three. The suction ports on the scraper for area one and the scraper for area three are connected to the sludge discharge pipeline through a conveying pipe. The sludge discharge pipeline is connected to the sludge treatment unit. The suction port on the scraper for area two is connected to the sludge reflux pipeline through a conveying pipe, and the sludge reflux pipeline is connected to the biological reaction tank;

[0011] The sludge decay monitoring device is used to monitor the decay situation of the sludge in the secondary sedimentation tank to obtain decay data. The intelligent control center determines the decay parameters of the decayed sludge according to the decay data by using the multi-dimensional partitioning method, and the mobile sludge suction device cleans the precipitated sludge at the target position.

[0012] Among them, the length of the scraper for area one is equal to the length of the sludge sedimentation area one, the length of the scraper for area two is equal to the length of the sludge sedimentation area two, and the length of the scraper for area three is equal to the length of the sludge sedimentation area three.

[0013] Among them, multiple suction ports are arranged on each scraper, and the suction ports are arranged in sequence on the scraper.

[0014] Among them, the intelligent control center receives the real-time monitoring results of the N sludge decay monitoring devices;

[0015] The intelligent control center includes a model creation unit, an analysis unit, and a display unit. The model creation unit creates a three-dimensional model of the secondary sedimentation tank based on the data of the secondary sedimentation tank input by the input unit. The analysis unit determines the decay parameters of the decayed sludge according to the decay data by using the multi-dimensional partitioning method. The display unit displays the decay parameters of the decayed sludge and the three-dimensional model.

[0016] Among them, when the analysis unit determines the decay parameters of the decayed sludge according to the decay data, it uses the multi-dimensional partitioning method to determine the decay parameters, specifically including:

[0017] Among the N sludge decay monitoring devices, select the sludge decay monitoring devices with decay data greater than the first threshold at adjacent times as the central sludge decay monitoring devices;

[0018] According to the decay data monitored by each sludge decay monitoring device at different times, calculate the stacking radii corresponding to the central sludge decay monitoring device and the M sludge decay monitoring devices adjacent to the central sludge decay monitoring device respectively;

[0019] Mark the stacking radii corresponding to the central sludge decay monitoring device and the M sludge decay monitoring devices adjacent to the central sludge decay monitoring device in the three-dimensional model respectively to obtain a marked three-dimensional model;

[0020] In the marked three-dimensional model, select the overlapping area of the stacking radii corresponding to the central sludge decay monitoring device and the M sludge decay monitoring devices adjacent to the central sludge decay monitoring device as the stacking area of the decayed sludge;

[0021] According to the decay data monitored by the central sludge decay monitoring device and the M sludge decay monitoring devices adjacent to the central sludge decay monitoring device at different times, and the area of the stacking area of the decayed sludge corresponding to the central sludge decay monitoring device, determine the stacking volume of the decayed sludge.

[0022] Among them, the stacking radius refers to the radius where sediment sludge may accumulate in the sludge decay monitoring device; M is an integer greater than or equal to 2.

[0023] Among them, when determining the stacking volume of the decayed sludge, the analysis unit determines the stacking volume of the decayed sludge according to the change rate of the change values of the central sludge decay monitoring device and the M sludge decay monitoring devices adjacent to the central sludge decay monitoring device at different times.

[0024] Among them, the display unit renders the decay parameters corresponding to each central sludge decay monitoring device in the three-dimensional model by using a selective rendering mechanism to obtain a target three-dimensional model, and displays the target three-dimensional model.

[0025] Among them, the display unit renders the corrosion parameters corresponding to each central sludge corrosion monitoring device in the three-dimensional model by using a selective rendering mechanism to obtain a target three-dimensional model, specifically including:

[0026] Mount a rendering selection detection component on the marked three-dimensional model;

[0027] In the marked three-dimensional model, divide the marked three-dimensional model into an occlusion area and a display area according to the stacking radii corresponding to each central sludge corrosion monitoring device and M sludge corrosion monitoring devices adjacent to the central sludge corrosion monitoring device;

[0028] Perform sludge corrosion rendering in the display area to obtain a target three-dimensional model;

[0029] The display unit displays the target three-dimensional model.

[0030] A sewage treatment method is applied to the above sewage treatment system, including the following steps:

[0031] Step 1, the pretreatment unit pre-treats the sewage to be treated to obtain primary treated water;

[0032] Step 2, the biological treatment unit performs secondary treatment on the primary treated water to obtain secondary treated water and sediment sludge;

[0033] Step 3, the sediment sludge is refluxed to the biological treatment unit or discharged from the sewage treatment system after being treated;

[0034] Step 4, the advanced treatment unit performs advanced treatment on the secondary treated water to obtain purified water meeting the discharge standard.

[0035] (III) Beneficial effects: The sewage treatment system and method of the present invention collect sludge in different zones according to the differences in the sedimentation performance of sludge in different sedimentation zones. The reflux sludge selects the sedimented sludge with good sludge sedimentation performance and high microbial activity, which improves the sludge concentration in the reflux sludge and the proportion of microorganisms with excellent biochemical performance. At the same time, the secondary sedimentation tank continuously screens the sludge in different zones, so as to obtain a microbial population with a fast sedimentation rate and excellent biochemical performance, thereby increasing the microbial concentration in the biological reaction tank, improving the proportion of microorganisms with excellent performance, improving the denitrification and phosphorus removal effects, and improving the effluent quality; in addition, the corrosion parameters are determined according to the real-time corrosion data to ensure timely and accurate cleaning of the sediment sludge at the dead corners of the secondary sedimentation tank, further ensuring the effluent quality of the secondary sedimentation tank. Description of the Drawings

[0036] Figure 1 is a schematic diagram of the water treatment process of the sewage treatment system of the present invention;

[0037] Figure 2It is a top - view structural schematic diagram of the secondary sedimentation tank of the sewage treatment system of the present invention;

[0038] Figure 3 It is a structural schematic diagram of the sedimentation partition of the secondary sedimentation tank of the sewage treatment system of the present invention;

[0039] Figure 4 It is a cross - sectional structural schematic diagram of the secondary sedimentation tank of the sewage treatment system of the present invention;

[0040] 1 - Input port; 2 - Outlet; 3 - Sludge discharge pipeline; 4 - Sludge return pipeline; 6 - Effluent trough; 9 - Scraper for zone one; 10 - Scraper for zone two; 11 - Scraper for zone three; 12 - First sedimentation zone; 13 - Second sedimentation zone; 14 - Third sedimentation zone. Specific embodiments

[0041] The following further elaborates on the present invention in conjunction with preferred embodiments. More details are set forth in the following description for a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from this description. Those skilled in the art can make similar generalizations and deductions according to the actual application situation without departing from the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0042] The accompanying drawings are schematic diagrams of the embodiments of the present invention. It should be noted that this accompanying drawing is only for illustration and is not drawn under the condition of equal proportion, and should not be used to limit the actual scope of protection required by the present invention.

[0043] A sewage treatment system includes a pretreatment unit, a biological treatment unit, and a advanced treatment unit. As Figure 1 shown, the pretreatment unit, the biological treatment unit, and the advanced treatment unit are connected in sequence. The sewage to be treated passes through the pretreatment unit, the biological treatment unit, and the advanced treatment unit in sequence to achieve the treatment of the sewage to be treated. The pretreatment unit is used for the pretreatment process of the sewage to be treated, that is, to pretreat the sewage to be treated to obtain primary treated water. The biological treatment unit performs secondary treatment on the primary treated water to obtain secondary treated water and sediment sludge. The sediment sludge can be returned to the biological treatment unit or discharged from the sewage treatment system after treatment. The advanced treatment unit performs advanced treatment on the secondary treated water to obtain purified water meeting the discharge standard.

[0044] The pretreatment process includes removing larger suspended substances, floating matters, and some inorganic particles in the sewage. Specifically, the pretreatment unit can remove larger suspended substances, floating matters, and some inorganic particles in the sewage, reduce the load of the subsequent treatment unit, and protect the normal operation of the equipment.

[0045] The pretreatment unit includes a primary water treatment device and a pretreatment effluent monitoring device. The primary water treatment device is used to implement the pretreatment process of the sewage to be treated, that is, to remove larger suspended substances, floating substances and some inorganic particles in the sewage, so as to obtain the primary treated water. The pretreatment effluent monitoring device is arranged at the outlet of the primary water treatment device and is used to monitor the data parameters of the sewage discharged from the primary water treatment device in real time, that is, the first quality parameter. The pretreatment effluent monitoring device is connected to the intelligent control center, and the pretreatment effluent monitoring device sends the monitored first quality parameter to the intelligent control center in real time.

[0046] The biological treatment unit includes a secondary treatment device and a secondary treatment monitoring device. The secondary treatment device includes a biological reaction tank and a secondary sedimentation tank. The biological reaction tank and the secondary sedimentation tank are connected by a conveying pipeline. Specifically, the discharge port of the biological reaction tank is connected to the input port 1 of the secondary sedimentation tank through the conveying pipeline. The biological reaction tank uses the activated sludge biological treatment method to remove organic pollutants and some nitrogen and phosphorus nutrients in the sewage to obtain a biological reaction mixed water body. The secondary sedimentation tank is used for sludge-water separation, so that the sludge in the biological reaction mixed water body precipitates. The precipitated sludge is called sediment sludge, and the supernatant is called secondary treatment effluent, that is, secondary treated water. A large number of microorganisms are contained in the activated sludge. Under aerobic conditions, the microorganisms metabolize and decompose the organic pollutants in the sewage as nutrients, converting them into carbon dioxide, water and their own cell substances.

[0047] The secondary treatment monitoring device is respectively connected to the intelligent control. The secondary treatment monitoring device includes biological reaction monitoring, mixed water body monitoring and supernatant monitoring. The biological reaction monitoring is arranged in the biological reaction tank and is used to monitor the sludge supply and demand parameters in the biological reaction tank in real time. The mixed water body monitoring is arranged at the discharge port of the biological reaction tank and is used to monitor the quality parameters of the biological reaction mixed water body in real time. The supernatant monitoring is arranged at the water outlet trough 6 of the secondary sedimentation tank and is used to monitor the quality parameters of the secondary treated water in real time.

[0048] The secondary sedimentation tank can be circular radial flow type, rectangular radial flow type or rectangular horizontal flow type. The conveying pipeline connecting the secondary sedimentation tank and the biological reaction tank is preferably connected to the center of the secondary sedimentation tank. At this time, the biological reaction mixed water body and / or the water distribution enter the secondary sedimentation tank from the center of the secondary sedimentation tank and diffuse towards the edge of the secondary sedimentation tank. The secondary sedimentation tank is divided into multiple sludge sedimentation areas from the center to the edge, specifically three areas: sludge sedimentation area 12, sludge sedimentation area 13 and sludge sedimentation area 14. Since the biological reaction mixed water body enters the secondary sedimentation tank from the center of the secondary sedimentation tank and diffuses towards the edge of the sedimentation tank, the sludge in the biological reaction mixed water body gradually precipitates at the bottom of the secondary sedimentation tank. Therefore, the sludge in different areas has significantly different properties. Among them, the sedimentation sludge in sedimentation area 1 has good sedimentation performance, but the activity of the sedimentation sludge is not high and the inorganic component is relatively high; the sedimentation sludge in sedimentation area 3 has poor sedimentation performance and a relatively high organic component in the sedimentation sludge; the sedimentation sludge in sedimentation area 2 has better properties than that in sludge sedimentation area 13 and sludge sedimentation area 14, with higher sedimentation property and organic matter component and higher microbial activity.

[0049] As Figures 2 - 4 shown, here, taking the secondary sedimentation tank as an example of circular radial flow type, an explanation is given.

[0050] The secondary sedimentation tank includes a tank body, an effluent trough, a working bridge, a sludge scraping board and a sludge discharge pipeline. The effluent trough is arranged at the edge position inside the mud of the tank body, and the height of the side far away from the tank body is less than the height of the tank body, and is used for discharging the secondary treated water in the tank body. The working bridge is arranged above the tank body, the sludge scraping board is connected with the working bridge and contacts the bottom surface inside the tank body. The sludge scraping board is used for removing the sedimentation sludge in the secondary sedimentation tank. When the working bridge rotates, the sludge scraping board rotates around the central axis of the tank body on the bottom surface of the tank body. The sludge discharge pipeline is used for discharging the sedimentation sludge in the secondary sedimentation tank.

[0051] The sludge scraping board includes a sludge scraping board 9 in area 1, a sludge scraping board 10 in area 2 and a sludge scraping board 11 in area 3. The sludge scraping board 9 in area 1, the sludge scraping board 10 in area 2 and the sludge scraping board 11 in area 3 extend from the central axis of the secondary sedimentation tank to the edge of the secondary sedimentation tank in sequence. And, the sludge scraping board 9 in area 1 corresponds to and contacts the bottom surface of the sludge sedimentation area 12 of the secondary sedimentation tank, the sludge scraping board 10 in area 2 corresponds to and contacts the bottom surface of the sludge sedimentation area 13 of the secondary sedimentation tank, and the sludge scraping board 11 in area 3 corresponds to and contacts the bottom surface of the sludge sedimentation area 14 of the secondary sedimentation tank. The sum of the lengths of the sludge scraping board 9 in area 1, the sludge scraping board 10 in area 2 and the sludge scraping board 11 in area 3 is equal to the length of the sludge sedimentation area of the secondary sedimentation tank.

[0052] The length of the sludge scraping board 9 in area 1 is equal to the length of the sludge sedimentation area 12, the length of the sludge scraping board 10 in area 2 is equal to the length of the sludge sedimentation area 13, and the length of the sludge scraping board 11 in area 3 is equal to the length of the sludge sedimentation area 14.

[0053] The sludge scraping plate is provided with sludge suction openings, which are used to suck the sediment sludge scraped by the sludge scraping plate. Specifically, the sludge suction openings are respectively provided on the sludge scraping plate in Area 1 (scraping plate 9), the sludge scraping plate in Area 2 (scraping plate 10), and the sludge scraping plate in Area 3 (scraping plate 11). Multiple sludge suction openings can be provided on each sludge scraping plate, and the sludge suction openings are arranged in sequence on the sludge scraping plate. When the sludge scraping plate in Area 1 (scraping plate 9), the sludge scraping plate in Area 2 (scraping plate 10), and the sludge scraping plate in Area 3 (scraping plate 11) scrape the sediment sludge at the bottom of the secondary sedimentation tank, the sludge suction openings on the sludge scraping plate in Area 1 (scraping plate 9), the sludge scraping plate in Area 2 (scraping plate 10), and the sludge scraping plate in Area 3 (scraping plate 11) respectively suck the sediment sludge in the corresponding sedimentation areas.

[0054] The sludge discharge pipeline of the secondary sedimentation tank includes a sludge return pipeline 4 and a sludge discharge pipeline 3. The sludge suction openings on the sludge scraping plate in Area 1 (scraping plate 9) and the sludge scraping plate in Area 3 (scraping plate 11) are connected to the sludge discharge pipeline 3 through a conveying pipe. The sludge discharge pipeline 3 is connected to a sludge treatment unit, and the sludge treatment unit treats the sediment sludge to be discharged and then discharges it from the sewage treatment system. The sludge suction openings on the sludge scraping plate in Area 2 (scraping plate 10) are connected to the sludge return pipeline 4 through a conveying pipe, and the sludge return pipeline 4 is connected to the biological reaction tank. The sludge return pipeline 4 introduces the sediment sludge with good sedimentation performance, high concentration, and high microbial activity into the biological reaction tank. Specifically, the sludge return pipeline 4 introduces the sediment sludge in sedimentation area 2 (area 13) into the biological reaction tank, achieving the effects of increasing the microbial concentration in the biological reaction tank, increasing the proportion of highly active microorganisms, improving the denitrification and phosphorus removal effects, and improving the effluent water quality.

[0055] The sludge treatment unit treats the sediment sludge discharged from the sludge discharge pipeline 3 to achieve reduction, stabilization, and harmlessness. The sludge treatment unit includes sludge thickening, sludge digestion, sludge dewatering, and sludge treatment monitoring. Sludge thickening reduces the moisture content of the sludge by gravity thickening, reduces the sludge volume, and realizes the separation of sludge and water. Sludge digestion includes an anaerobic digestion device and an aerobic digestion device. The anaerobic digestion device decomposes the organic matter in the sludge by anaerobic microorganisms under anaerobic conditions to produce biogas, realizing the stabilization and resource utilization of the sludge; the aerobic digestion device stabilizes the sludge through the action of aerobic microorganisms under aerobic conditions. Sludge dewatering is used to remove the water in the sludge, making the sludge form a sludge cake for easy transportation and disposal. Sludge treatment monitoring is used to monitor the sludge parameters in the sludge treatment device in real time.

[0056] The advanced treatment unit is used to remove the residual pollutants in the sewage, so that the water quality reaches a higher standard. It includes a coagulation and sedimentation unit, a filtration unit, a disinfection unit, and an effluent monitoring unit for advanced sewage treatment. The coagulation and sedimentation unit adds a coagulant to the water, causing the coagulant and tiny suspended solids to agglomerate into large particles, which are then removed by sedimentation, effectively reducing turbidity and removing some organic matter and heavy metal ions. The filtration unit further removes fine particles, colloids, some dissolved organic matter, and microorganisms by using a filtration medium. The disinfection unit kills pathogenic microorganisms through disinfection to ensure water quality safety. The effluent monitoring unit of the advanced treatment unit is used to monitor the data parameters of the sewage discharged from the advanced treatment unit in real time. The coagulation and sedimentation unit, the filtration unit, and the disinfection unit are sequentially connected by a conveying pipeline.

[0057] The secondary sedimentation tank also includes a movable sludge suction device, which is used to clean the sediment sludge at the target position. The movable sludge suction device includes a scraper, a sludge suction pipe, a photographing device, a moving device, and a display. The sludge suction pipe is arranged on the scraper, and the scraper is fixed on the moving device through a fixed rod. The photographing device can be fixed at one end of the fixed rod close to the scraper. The photographing device collects the accumulation situation of the sediment sludge near the scraper in real time and displays it on the display. The scraper scrapes the sediment sludge at the target position according to the real-time situation of the photographing device. Specifically, the administrator adjusts the moving device and the fixed rod through the image displayed on the display to adjust the position of the scraper and clean the sediment sludge at the target position. When the scraper scrapes and cleans the sediment sludge, the sludge suction pipe sucks the sediment sludge scraped by the scraper, and the end of the sludge suction pipe away from the scraper is connected to the sludge treatment unit.

[0058] The secondary treatment monitoring device also includes a sludge corruption monitoring device arranged in the secondary sedimentation tank, which is used to monitor the corruption situation of the sludge in the secondary sedimentation tank and obtain corruption data. There are N sludge corruption monitoring devices, where N is an integer greater than 1. Among them, N is optimally an integer greater than 10. The sludge corruption monitoring devices are evenly distributed at the bottom of the secondary sedimentation tank, or according to the scraping dead corners of the sediment sludge, the sludge corruption monitoring devices are evenly distributed around the scraping dead corners. When the sludge corruption monitoring devices monitor the corruption situation of the sludge in the secondary sedimentation tank, they can also sample the biological reaction mixed water body at a specified position in the secondary sedimentation tank, and then the sludge corruption monitoring devices detect it, and no specific restrictions are made here.

[0059] The sewage treatment system further includes an intelligent control center, which receives the real-time monitoring results of each monitoring device. The intelligent control center includes a model creation unit, an analysis unit, and a display unit. The model creation unit creates a three-dimensional model of the secondary sedimentation tank according to the data of the secondary sedimentation tank input by the input unit. The analysis unit determines the corruption parameters of the corrupted sludge according to the corruption data, and the corruption parameters include the accumulation position and accumulation volume of the corrupted sludge. The display unit displays the corruption parameters of the corrupted sludge and the three-dimensional model to facilitate the timely cleaning of the corrupted sludge.

[0060] The three-dimensional model is a proportional model of the secondary sedimentation tank, including the shape and size of the secondary sedimentation tank, and various components attached to the secondary sedimentation tank. The various components attached to the secondary sedimentation tank include various components for realizing sewage treatment, secondary treatment monitoring devices, etc.

[0061] The sludge corruption monitoring device can be one or more of a hydrogen sulfide detection device, a methane detection device, a pH value detection device, or a detection device for changes in other key substances during sludge corruption, such as increase or decrease, which is not specifically limited here.

[0062] The corruption data includes at least detection values, such as one or more of a hydrogen sulfide detection value, a methane detection value, and a pH value.

[0063] When the analysis unit determines the corruption parameters of the corrupted sludge according to the corruption data, it uses a multi-dimensional partitioning method to determine the corruption parameters. Specifically,

[0064] Among N sludge corruption monitoring devices, select the sludge corruption monitoring devices with corruption data greater than the first threshold at adjacent times as the central sludge corruption monitoring devices;

[0065] According to the corruption data monitored by each sludge corruption monitoring device at different times, calculate the accumulation radii corresponding to the central sludge corruption monitoring device and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device respectively; the accumulation radius refers to the radius where sediment sludge may accumulate in the sludge corruption monitoring device; M is an integer greater than or equal to 2;

[0066] Mark the accumulation radii corresponding to the central sludge corruption monitoring device and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device in the three-dimensional model respectively to obtain a marked three-dimensional model;

[0067] Select the overlapping area of the accumulation radii corresponding to the central sludge corruption monitoring device and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device in the marked three-dimensional model as the accumulation area of the corrupted sludge;

[0068] Determine the accumulated volume of the putrefied sludge based on the putrefaction data monitored by the central sludge putrefaction monitoring device, M sludge putrefaction monitoring devices adjacent to the central sludge putrefaction monitoring device at different times, and the area of the putrefied sludge accumulation area corresponding to the central sludge putrefaction monitoring device.

[0069] The analysis unit includes a standard value of the accumulation radius. When the difference between the putrefaction data and the standard value of the accumulation radius is larger, the closer the putrefied sludge is to the sludge putrefaction monitoring device that obtains the putrefaction data, the closer the position where the precipitated sludge accumulates is to the sludge putrefaction monitoring device that obtains the putrefaction data. Taking the sludge putrefaction monitoring device that obtains the putrefaction data as the center, the radius (accumulation radius) where putrefied sludge may accumulate is smaller. On the contrary, the radius (accumulation radius) where putrefied sludge may accumulate is larger.

[0070] The analysis unit includes a comparison table of the accumulation radius. The comparison table of the accumulation radius is a comparison table between the difference between the putrefaction data and the standard value of the accumulation radius and the distance between the putrefied sludge and the sludge putrefaction monitoring device that obtains the putrefaction data. The standard value of the accumulation radius and the comparison table of the accumulation radius can be input or modified through the input unit.

[0071] When calculating the accumulation radius corresponding to the central sludge putrefaction monitoring device and M sludge putrefaction monitoring devices adjacent to the central sludge putrefaction monitoring device respectively according to the putrefaction data monitored by each sludge putrefaction monitoring device at different times, the analysis unit calculates the difference between the putrefaction data and the standard value of the accumulation radius, and selects the distance between the corresponding putrefied sludge and the sludge putrefaction monitoring device that obtains the putrefaction data in the comparison table of the accumulation radius according to the difference, that is, the accumulation radius corresponding to the sludge putrefaction monitoring device is obtained.

[0072] When determining the accumulated volume of the putrefied sludge, the analysis unit determines the accumulated volume of the putrefied sludge according to the change rate of the change values of the central sludge putrefaction monitoring device and M sludge putrefaction monitoring devices adjacent to the central sludge putrefaction monitoring device at different times. Specifically, when the change rate of the change values of the central sludge putrefaction monitoring device and M sludge putrefaction monitoring devices adjacent to the central sludge putrefaction monitoring device at different times is larger, the accumulated volume of the putrefied sludge is larger; when the change rate of the change values of the central sludge putrefaction monitoring device and M sludge putrefaction monitoring devices adjacent to the central sludge putrefaction monitoring device at different times is smaller, the accumulated volume of the putrefied sludge is smaller.

[0073] The accumulated volume here not only represents the accumulated amount of the precipitated sludge, but also represents the impact of the accumulation of the putrefied sludge on the water treatment water quality: when the accumulated volume of the putrefied sludge is larger, the impact of the accumulation of the putrefied sludge on the water treatment water quality is larger; when the accumulated volume of the putrefied sludge is smaller, the impact of the accumulation of the putrefied sludge on the water treatment water quality is smaller.

[0074] The analysis unit further includes a standard value of the rate of change of the putrefied data, a comparison table of the accumulation volume, a first threshold value of the accumulation height of the putrefied sludge, and a second threshold value of the accumulation height of the putrefied sludge. The standard value of the rate of change of the putrefied data, the comparison table of the accumulation volume, the first threshold value of the accumulation height of the putrefied sludge, and the second threshold value of the accumulation height of the putrefied sludge can be input or modified through the input unit, and the first threshold value of the accumulation height of the putrefied sludge is less than the second threshold value of the accumulation height of the putrefied sludge. When the difference between the rate of change of the putrefied data and the standard value of the rate of change of the putrefied data is larger, the accumulation volume of the putrefied sludge is larger; when the difference between the rate of change of the putrefied data and the standard value of the rate of change of the putrefied data is smaller, the accumulation volume of the putrefied sludge is smaller.

[0075] The comparison table of the accumulation volume is a comparison table between the difference between the rate of change of the putrefied data and the standard value of the rate of change of the putrefied data, and the accumulation volume corresponding to the sludge putrefaction monitoring device that obtains the putrefied data.

[0076] When determining the accumulation volume of the putrefied sludge according to the putrefied data monitored by the central sludge putrefaction monitoring device, M sludge putrefaction monitoring devices adjacent to the central sludge putrefaction monitoring device at different times, and the area of the accumulation area of the putrefied sludge corresponding to the central sludge putrefaction monitoring device, specifically, the analysis unit calculates the difference between the rate of change of the putrefied data and the standard value of the rate of change of the putrefied data, and selects the accumulation volume corresponding to the sludge putrefaction monitoring device that obtains the putrefied data in the comparison table of the accumulation volume according to the difference; calculates the accumulation height according to the accumulation volume and the area of the accumulation area of the putrefied sludge corresponding to the central sludge putrefaction monitoring device, and verifies the accumulation volume: when the calculated accumulation height is greater than or equal to the first threshold value of the accumulation height of the putrefied sludge and less than or equal to the second threshold value of the accumulation height of the putrefied sludge, the accumulation volume is verified to pass (normal); when the calculated accumulation height is less than the first threshold value of the accumulation height of the putrefied sludge or greater than the second threshold value of the accumulation height of the putrefied sludge, the accumulation volume is abnormal and the verification fails. The analysis unit can recalculate the accumulation volume according to the putrefied data at other times according to the above steps.

[0077] The display unit can also render the putrefaction parameters corresponding to each central sludge putrefaction monitoring device in the three-dimensional model by using a selective rendering mechanism to obtain a target three-dimensional model, and display the target three-dimensional model. The administrator can clean the accumulated putrefied sludge in time according to the target three-dimensional model to ensure the effluent quality of the secondary sedimentation tank.

[0078] The display unit renders the putrefaction parameters corresponding to each central sludge putrefaction monitoring device in the three-dimensional model by using a selective rendering mechanism to obtain a target three-dimensional model, which specifically includes the following steps

[0079] Mount a rendering selection detector on the marked 3D model; the rendering selection detector is used to detect the occlusion area of the marked model and avoid rendering the occlusion area when rendering the accumulation of corrupted sludge.

[0080] In the marked 3D model, according to the accumulation radius corresponding to each central sludge corruption monitoring device marked and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device, the marked 3D model is divided into an occlusion area and a display area.

[0081] Perform sludge corruption rendering in the display area to obtain a target 3D model.

[0082] The display unit displays the target 3D model.

[0083] The display area is the accumulation area of the corrupted sludge corresponding to each central sludge corruption monitoring device in the marked 3D model. Specifically, the display area is the overlapping area of the accumulation radii corresponding to each central sludge corruption monitoring device and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device in the marked 3D model. The display area is the rendering area during sludge corruption rendering.

[0084] In the marked 3D model, except for the display area, the rest is the occlusion area. The occlusion area is the area that needs to be avoided during sludge corruption rendering.

[0085] A sewage treatment method is applied to the above sewage treatment system and specifically includes the following steps:

[0086] Step 1: The pretreatment unit pre-treats the sewage to be treated to obtain primary treated water.

[0087] Step 2: The biological treatment unit performs secondary treatment on the primary treated water to obtain secondary treated water and sediment sludge.

[0088] Step 3: The sediment sludge is refluxed to the biological treatment unit or discharged from the sewage treatment system after being treated.

[0089] Step 4: The advanced treatment unit performs advanced treatment on the secondary treated water to obtain purified water that meets the discharge standard.

[0090] A sewage treatment system and method, according to the differences in the sedimentation performance of sludge in different sedimentation areas, collects the sludge in zones. The returned sludge selects the sedimented sludge with good sedimentation performance and high microbial activity, which improves the sludge concentration in the returned sludge and the proportion of microorganisms with excellent biochemical performance. At the same time, through continuous screening of the sludge in zones in the secondary sedimentation tank, a microbial population with a fast sedimentation rate and excellent biochemical performance is obtained, thereby increasing the microbial concentration in the biological reaction tank, increasing the proportion of microorganisms with excellent performance, improving the denitrification and phosphorus removal effects, and improving the effluent quality.

[0091] In addition, the corruption parameters can be determined according to the real-time corruption data to ensure timely and accurate cleaning of the sedimented sludge at the dead corners of the secondary sedimentation tank, further ensuring the effluent quality of the secondary sedimentation tank; at the same time, the three-dimensional model can be rendered to enable the administrator to more intuitively determine the position of the sedimented sludge at the dead corners of the secondary sedimentation tank and select the best cleaning time. When rendering the three-dimensional model, a selective rendering mechanism is adopted, which can not only accurately render the display area, but also reduce the performance consumption, lower the configuration requirements of the intelligent control center, and improve the rendering speed.

[0092] The above content is an illustration of the preferred embodiments of the present invention, which can help those skilled in the art to more fully understand the technical solutions of the present invention. However, these embodiments are only examples and cannot be considered that the specific implementation manners of the present invention are limited to the descriptions of these embodiments. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions and transformations can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A sewage treatment system, characterized in that: It includes a pre-treatment unit, a biological treatment unit, a deep treatment unit, and an intelligent control center which are connected in sequence, wherein the biological treatment unit includes a biological reaction tank and a secondary sedimentation tank connected by a conveying pipeline; The secondary sedimentation tank is divided into a plurality of sedimentation areas from the center to the edge: sedimentation area 1, sedimentation area 2 and sedimentation area 3; the secondary sedimentation tank comprises a scraper, a sludge discharge pipe for guiding out the sedimentation sludge and N sludge corruption monitoring devices arranged in the secondary sedimentation tank; the scraper comprises a scraper in area 1, a scraper in area 2 and a scraper in area 3, the scraper in area 1 is in contact with the bottom surface of the sedimentation area 1, the scraper in area 2 is in contact with the bottom surface of the sedimentation area 2, and the scraper in area 3 is in contact with the bottom surface of the sedimentation area 3; the sludge corruption monitoring device is used to monitor the corruption of the sludge in the secondary sedimentation tank and obtain corruption data; The sludge discharge pipe includes a sludge return pipe and a sludge discharge pipe, and the scraper plates in zone 1, zone 2 and zone 3 are respectively provided with sludge suction ports, and the sludge suction ports on the scraper plates in zone 1 and zone 3 are connected to the sludge discharge pipe through a conveying pipe, and the sludge discharge pipe is connected to the sludge treatment unit, and the sludge suction port on the scraper plates in zone 2 is connected to the sludge return pipe through a conveying pipe, and the sludge return pipe is connected to the biological reaction tank; The intelligent control center receives the real-time monitoring results of N sludge decay monitoring devices; after the intelligent control center uses a multi-dimensional partitioning method to determine the decay parameters of the decayed sludge according to the decay data, the mobile sludge suction device cleans the sediment sludge at the target position; the intelligent control center includes a model creation unit, an analysis unit and a display unit, the model creation unit creates a three-dimensional model of the secondary sedimentation tank according to the secondary sedimentation tank data input by the input unit, the analysis unit uses a multi-dimensional partitioning method to determine the decay parameters of the decayed sludge according to the decay data, and the display unit displays the decay parameters of the decayed sludge and the three-dimensional model; The display unit renders the corruption parameters corresponding to each central sludge corruption monitoring device in the three-dimensional model using a selection rendering mechanism to obtain a target three-dimensional model, and displays the target three-dimensional model.

2. A sewage treatment system according to claim 1, characterized in that: The length of the scraper blade in zone 1 is equal to the length of the first sludge zone, the length of the scraper blade in zone 2 is equal to the length of the second sludge zone, and the length of the scraper blade in zone 3 is equal to the length of the third sludge zone.

3. A sewage treatment system according to claim 1, characterized in that: Each scraper is provided with a plurality of suction ports, which are arranged in sequence on the scraper.

4. A sewage treatment system according to claim 1, characterized in that: When determining the decay parameters of the decayed sludge according to the decay data, the analysis unit adopts a multidimensional partitioning method to determine the decay parameters, specifically including: Among the N sludge decay monitoring devices, a sludge decay monitoring device whose decay data at adjacent moments is greater than a first threshold is selected as a central sludge decay monitoring device; According to the corruption data monitored by each sludge corruption monitoring device at different times, respectively calculating the accumulation radius corresponding to the central sludge corruption monitoring device and the M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device; Marking the accumulation radii corresponding to the central sludge corruption monitoring device and the M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device in the three-dimensional model to obtain a marked three-dimensional model; In the marked three-dimensional model, the overlapping area of ​​the accumulation radius corresponding to the central sludge corruption monitoring device and the M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device is selected as the accumulation area of ​​the corrupted sludge; The accumulated volume of the corrupted sludge is determined based on the corruption data monitored at different times by the central sludge corruption monitoring device and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device, and the area of ​​the corrupted sludge accumulation region corresponding to the central sludge corruption monitoring device.

5. A sewage treatment system according to claim 4, characterized in that: The accumulation radius refers to: the radius where sediment sludge accumulation may occur in the sludge corruption monitoring device; M is an integer greater than or equal to 2.

6. A sewage treatment system according to claim 4, characterized in that: The analysis unit includes a standard value of the accumulation radius and a comparison table of the accumulation radius. The comparison table of the accumulation radius is a comparison table of the difference between the corruption data and the standard value of the accumulation radius, and the distance between the sludge corruption monitoring devices to obtain the corruption data based on the corrupted sludge distance. When the accumulation radii corresponding to the central sludge corruption monitoring device and the M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device are calculated respectively according to the corruption data monitored by each sludge corruption monitoring device at different times, the analysis unit calculates the difference between the corruption data and the standard value of the accumulation radius, and selects the distance between the sludge corruption monitoring devices to obtain the corruption data corresponding to the corrupted sludge distance in the accumulation radius comparison table according to the difference, that is, the accumulation radius corresponding to the sludge corruption monitoring device is obtained.

7. A sewage treatment system according to claim 4, characterized in that: When determining the accumulated volume of the corrupted sludge, the analysis unit determines the accumulated volume of the corrupted sludge according to the change rates of the central sludge corrupting monitoring device and the M sludge corrupting monitoring devices adjacent to the central sludge corrupting monitoring device at different times.

8. A sewage treatment system according to claim 7, characterized in that: The analysis unit further includes a decay data change rate standard value, an accumulation volume comparison table, a first decay sludge accumulation height threshold and a second decay sludge accumulation height threshold, wherein the first decay sludge accumulation height threshold is less than the second decay sludge accumulation height threshold, and the accumulation volume comparison table is a comparison table between the difference between the decay data change rate and the decay data change rate standard value and the accumulation volume corresponding to the sludge decay monitoring device that obtains the decay data; When the accumulation volume of the corrupted sludge is determined based on the corruption data monitored at different times by the central sludge corruption monitoring device and M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device, and the area of ​​the corrupted sludge accumulation region corresponding to the central sludge corruption monitoring device, specifically, the analysis unit calculates the difference between the change rate of the corruption data and the standard value of the change rate of the corruption data, and selects the accumulation volume corresponding to the sludge corruption monitoring device that obtains the corruption data in the accumulation volume comparison table according to the difference; the accumulation height is calculated according to the accumulation volume and the area of ​​the corrupted sludge accumulation region corresponding to the central sludge corruption monitoring device, and the accumulation volume is verified: when the calculated accumulation height is greater than or equal to the first corrupted sludge accumulation height threshold and less than or equal to the second corrupted sludge accumulation height threshold, the accumulation volume is verified; when the calculated accumulation height is less than the first corrupted sludge accumulation height threshold, or greater than the second corrupted sludge accumulation height threshold, the accumulation volume is abnormal and the verification fails, and the analysis unit can recalculate the accumulation volume according to the above steps based on the corruption data at other times.

9. A sewage treatment system according to claim 4, characterized in that: The display unit renders the corruption parameters corresponding to each central sludge corruption monitoring device in the three-dimensional model by using a selection rendering mechanism to obtain a target three-dimensional model, specifically including: Mounting a rendering selection detection part on the marked three-dimensional model; In the marked three-dimensional model, according to the stacking radius corresponding to each marked central sludge corruption monitoring device and the M sludge corruption monitoring devices adjacent to the central sludge corruption monitoring device, the marked three-dimensional model is divided into an occlusion area and a display area; Performing sludge corruption rendering in the display area to obtain a target three-dimensional model; The display unit displays the target three-dimensional model.

10. A sewage treatment method, using the sewage treatment system according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: the pretreatment unit pre-treats the wastewater to be treated to obtain primary treated water; Step 2: The biological treatment unit performs secondary treatment on the primary treated water to obtain secondary treated water and sediment sludge; Step 3, the precipitated sludge is returned to the biological treatment unit, or discharged from the sewage treatment system after treatment; Step 4: The deep treatment unit performs deep treatment on the secondary treated water to obtain purified water that meets the discharge standards.

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