CN-121977978-A - Activated sludge SV30 real-time detection system and method

Abstract

The invention relates to the technical field of sewage treatment, in particular to an activated sludge SV30 real-time detection system and method, comprising a sedimentation observation cylinder and a control system; the control system is connected with and controls the operation of the vacuum pump so as to vacuumize the sedimentation observation cylinder through the overflow port, thereby leading sewage in the pipeline to be detected to enter the sedimentation observation cylinder and reach the height of the overflow port, and the control system also collects sedimentation images in the sedimentation observation cylinder and analyzes SV 30. The invention discloses an intelligent evaluation system for activated sludge sedimentation performance (SV 30) by combining image recognition, multi-parameter analysis and artificial intelligence. The transition of SV30 from 'static measurement' to 'dynamic monitoring' is realized, and a 'visible, accurate and controlled' whole-process closed-loop management system is constructed.

Inventors

• DING KAI
• ZHAO DAN
• LU WENBAO

Assignees

• 上海威派格智慧水务股份有限公司

Dates

Publication Date

20260505

Application Date

20260126

Claims (10)

1. 1. The real-time detection system for the SV30 of the activated sludge is characterized by comprising a sedimentation observation cylinder and a control system; the sedimentation observation cylinder is in a hollow long cylinder shape, and the bottom of the sedimentation observation cylinder is provided with a liquid inlet and outlet and is connected with an external pipeline to be detected; The top of the sedimentation observation cylinder is connected with a gas-liquid flushing pipeline, the side surface of the sedimentation observation cylinder is provided with an overflow port at a preset height, and the overflow port is connected with a vacuum pump through an air suction pipeline; The control system is connected with and controls the operation of the vacuum pump so as to vacuumize the sedimentation observation cylinder through the overflow port, so that sewage in the pipeline to be detected enters the sedimentation observation cylinder and reaches the height of the overflow port; The control system is also connected with a visual detection system and acquires a sedimentation image in the sedimentation observation cylinder through the visual detection system; And the control system analyzes the sedimentation image to obtain an SV30 detection result and outputs the SV30 detection result.
2. 2. The activated sludge SV30 real time detection system of claim 1, wherein said gas-liquid flushing pipeline comprises: the tap water pipeline is connected with an external tap water supply network, and a tap water valve is arranged above the tap water pipeline; the first end of the air flow blowing pipeline is connected with the sedimentation observation cylinder, and the second end of the air flow blowing pipeline is connected with the exhaust port of the vacuum pump; The air flow blowing pipeline is provided with an air flow blowing valve; The control system is respectively connected with the tap water valve and the air flow blowing valve, and the tap water valve and the air flow blowing valve are opened in the flushing stage so as to input water flow and air flow in the vertical direction into the settlement observation cylinder for mixed flushing.
3. 3. The activated sludge SV30 real time detection system of claim 1, wherein said suction conduit comprises a first suction conduit, a buffer tank and a second suction conduit; the first end of the first air suction pipeline is connected with the overflow port; the second end of the first air suction pipeline is connected with a liquid inlet above the buffer tank; the first end of the second air suction pipeline is connected with an air outlet above the buffer tank; The second end of the second air suction pipeline is connected with an air inlet of the vacuum pump; the vacuum pump, the first air suction pipeline and the second air suction pipeline are all positioned above the buffer tank; and the second air suction pipeline is provided with an air suction control valve, and the control system is connected with the air suction control valve and opens the air suction control valve in the air suction stage.
4. 4. The real-time activated sludge SV30 detection system of claim 2, wherein the exhaust port of said vacuum pump is further connected to an exhaust pipe, said exhaust pipe being provided with a vacuum pump exhaust valve.
5. 5. The activated sludge SV30 real time detection system of claim 3, further comprising an air intake conduit disposed on said second air intake conduit, a first end of said air intake conduit being disposed between said air intake control valve and an air intake end of said vacuum pump; and the air inlet pipeline is provided with a vacuum pump air inlet valve.
6. 6. A detection method, characterized by being applied to the real-time detection system of the activated sludge SV30 according to any one of claims 1 to 5; The detection method comprises the following steps: Step S1, vacuumizing the sedimentation observation cylinder by adopting the air suction pipeline so that sewage is pumped in through the bottom of the sedimentation observation cylinder; S2, SV30 detection is carried out on the sewage based on a visual detection system to obtain a detection result; and S3, discharging the sewage, and adopting the gas-liquid flushing pipeline to perform mixed flushing on the sedimentation observation cylinder.
7. 7. The method according to claim 6, wherein the step S2 includes: S21, respectively collecting a plurality of groups of sedimentation images of the sedimentation observation cylinder according to a preset time interval; S22, carrying out semantic segmentation on the sedimentation image to respectively determine muddy water interfaces and generating a mask map; s23, converting according to the mask map to obtain a sediment layer duty ratio at a corresponding time point; and step S24, generating the detection result according to the duty ratio of the precipitation layer.
8. 8. The method according to claim 7, wherein the step S2 further includes a multi-dimensional analysis process, the multi-dimensional analysis process including: Generating mud-water interface definition of the sedimentation image according to the mask image; and dividing the sedimentation image according to the mask image to obtain a clear liquid area, and then calculating the turbidity state of the clear liquid according to the clear liquid area; And dividing the sedimentation image to obtain a floccule region, and then respectively calculating floccule color distribution and floccule size morphology for the floccule region.
9. 9. The method of claim 8, further comprising, after performing the multi-dimensional analysis process: And step A3, matching decision rules according to the analysis result and the detection result of the multidimensional analysis process so as to output the corresponding decision rules to regulate and control the sewage.
10. 10. The method of claim 8, further comprising, after performing the multi-dimensional analysis process: and step B3, weighting and scoring according to the analysis result of the multidimensional analysis process, and then obtaining the health score of the sewage and outputting the health score.

Description

Activated sludge SV30 real-time detection system and method Technical Field The invention relates to the technical field of sewage treatment, in particular to an activated sludge SV30 real-time detection system and method. Background SV30 is the volume percentage of precipitated sludge formed by standing the mixed liquid of the aeration tank in a measuring cylinder for 30min, which is expressed as percent. The sludge sedimentation ratio can reflect the activated sludge amount in the operation process of the aeration tank, can control and regulate the discharge amount of excess sludge, and can timely discover abnormal phenomena such as sludge expansion and the like. The detection equipment is simple and the detection standard is visual, so that the detection equipment is commonly used for daily inspection work of sewage treatment facilities. In the prior art, a technical scheme for automatically realizing SV30 detection exists. For example, patent document CN202511216393.4 discloses an automatic sludge sedimentation SV detecting device, which comprises a reader and an installation support plate on one side of the reader, a measuring cylinder is arranged on one side of the installation support plate close to the reader, a mounting seat is fixedly connected on one side of the measuring cylinder close to the installation support plate, a mounting frame I is arranged on one side of the installation support plate close to the reader, a sliding rail mechanism is fixedly connected on one side of the mounting frame I close to the installation support plate, a wire slot guide chain mechanism is arranged on one side of the sliding rail mechanism away from the measuring cylinder, and a flushing sliding table guide rail and an SV detection sliding table guide rail are arranged on one side of the sliding rail mechanism close to the measuring cylinder. After sampling, the device can automatically detect SV30, and the mechanical structure is driven to move by means of the signals of the optical sensor to acquire data, and the data are integrated and analyzed to obtain an SV30 value, wherein the measuring precision can reach 1 ml. For example, patent document of application number CN202221508349.2 discloses SV30 automated inspection and early warning equipment, including mount, carriage and detection section of thick bamboo, through bolted connection electric hydraulic push rod in the mount, electric hydraulic push rod's output passes through bolted connection carriage, one side of carriage bottom is used for the sampling section of thick bamboo of sampling through bolted connection, the opposite side of carriage bottom passes through bolted connection detection section of thick bamboo, and the water inlet at detection section of thick bamboo top is detected through the pipeline intercommunication to the play water end of sampling section of thick bamboo one side, the periphery of detection section of thick bamboo is provided with the detection ring that is used for detecting SV, one side in the detection ring is provided with the infrared raster transmitter, the opposite side in the detection ring is provided with corresponding infrared raster receiver. The SV30 automatic detection and early warning device has the advantages of simple structure, easy operation, flexible and reliable use and high practical value, and is suitable for being widely popularized and used. However, in practical implementation, the inventors have found that in an on-line monitoring scenario, the measuring instrument typically needs to be sampled once every few hours, and repeated multiple times. The last sampled sludge is liable to form flocks hanging on the inner wall of the measuring cylinder, resulting in inaccurate sludge content in subsequent measurement. There are also typically the following pain points: 1. The current SV30 detection relies on manual visual inspection, and has large subjective error (the judgment deviation of different people reaches 10-30 percent) and poor timeliness (the single detection only reflects the instantaneous state); 2. The timeliness and the continuity are poor, the single detection only reflects the instantaneous state, the process change (such as the water inlet impact load) cannot be dynamically monitored, manual sampling is relied on, and the integration into an automatic control system is difficult; 3. The existing automatic equipment replaces manual reading, only reflects physical sedimentation performance, single visual detection cannot distinguish sedimentation performance and microbial activity, cannot correlate and quantify sludge activity and the like, and lacks sludge health degree diagnosis capability; 4. Multiple factor coupling analysis was performed without binding to process parameters (e.g., MLSS, DO). Disclosure of Invention Aiming at the problems in the prior art, a real-time detection system for SV30 of activated sludge is provided; In another aspect, a detection method suitable for use in