1. Overview:

Sewage as the primary source of pollution will cause pollution of water environments such as rivers, lakes, and groundwater; Therefore, whether the sewage treatment is matching the standards, whether there is the private placement of illegal sewage, whether the sludge is under the standardization of treatment, all these are the city's environmental protection departments need to focus on.

It is an effective guarantee to reduce the environmental pollution by installing qualified sewage treatment equipment at the source of wastewater generation and ensuring that producers strictly implement the standard of sewage treatment and regularly opening and running sewage treatment equipment regularly. Therefore, it is necessary to constantly strengthen the supervision of the sewage treatment process.

In order to reduce the investment of excessive manpower and material resources in the regulation of sewage treatment, we started with the video surveillance of sewage treatment using the mature Internet technology and reliable high-definition video equipment to launch the video monitoring system of sewage treatment process based on intelligent video analysis technology. Achieve all aspects of sewage treatment facilities and remote, real-time, effective regulation.

2. Sewage Treatment Technology

Modern sewage treatment technology, divided by the degree of treatment, can be divided into first-class, second-class and third-class treatment, generally based on water quality and treatment of water to determine the class of the sewage treatment.

Figure (1) Typical sewage treatment process

First-class

Mainly to remove suspended solids in the sewage-contaminated material, most of the physical treatment method can only be completed by a request. After first-class treatment, BOD can generally be removed about 30%, can not reach the emission standards. first-class treatment is a pretreatment of the second-class process.

Second-class

Removal of sewage colloidal and dissolved organic pollutants (BOD, COD material), the removal rate of up to 90% or more, the organic pollutants to achieve emission standards, suspended solids at a removal rate of 95%, water quality is good.

Third-class

Further treatment of the refractory organic matter, nitrogen and phosphorus can cause water eutrophication of soluble inorganic substances. The main methods are biological nitrogen and phosphorus removal, coagulation and sedimentation, sand filtration, activated carbon adsorption, ion exchange and electrodialysis.

The whole process is through the coarse grille of the original sewage through the sewage pump to enhance the lift, through the grille or screen, and then into the grit chamber, after separation of sand water into the initial sedimentation tank, above is first-class treatment (that is, physical treatment); Primary sedimentation tank effluent into the biological treatment equipment, activated sludge and biofilm Act, (including activated sludge aeration tank reactor, oxidation ditch, biofilm method including biological filters, biological rotary plate, biological Contact oxidation and biological fluidized bed), Biological treatment equipment into the secondary sedimentation tank effluent, secondary sedimentation tank effluent disinfection or discharge into the third-class treatment, first-class treatment to the end of this point is second-level treatment; The third-class treatment include biological nitrogen and phosphorus removal, coagulation, and sedimentation, sand filtration, activated carbon adsorption, ion exchange and electrodialysis. A part of the sludge in the secondary settling tank is returned to the primary settling tank or the biological treatment equipment, and part of it enters the sludge thickening tank and then enters the sludge digester. After being dehydrated and dried, the sludge is finally used. Aeration tanks are a suitable venue for intelligent video surveillance throughout the wastewater treatment cycle.

3. Aeration Tank Monitoring Principle

Aeration basin is a biochemical reactor designed according to the characteristics of microorganisms. The degree of degradation of organic contaminants mainly depends on the aeration reaction conditions designed by people.

Aeration tank use activated sludge process for sewage treatment. For the normal operation of the activated sludge process, oxygen in the air is forcibly dissolved into the mixed liquor, the tank provides a certain residence time of the sewage to meet the required oxygen amount of the aerobic microorganisms and the mixed conditions of full contact of the sewage with the activated sludge. Aeration tank mainly by the pool body, aeration system and the inlet and outlet of three parts. The pool body is generally made of reinforced concrete, the shape of a rectangular plane, square and round and so on.

Aeration is a means of bringing air into strong contact with water and is designed to dissolve the oxygen in the air in the water or to expel unwanted gases and volatiles from the water to the air. In other words, it is a means of promoting the exchange of matter between gases and liquids. It also has other important functions, such as mixing. The oxygen in the air is transferred to the water by aeration, and the oxygen is transferred from the gas phase to the liquid phase. The aeration equipment is widely used in sewage treatment based on this practice.

Aeration can be divided into two types, mainly blast aeration and mechanical aeration. The resulting changes in the working surface and non-working surface ripples can be used as the basis for intelligent video analysis of the equipment on and off.

Figure (2) Aeration tank

4. Aeration Tank Illegal Shutdown Monitoring Video Intelligent Analysis

Taichen VMS platform, not only can implement a comprehensive remote network video monitoring program, but also can effectively use computer video intelligent analysis technology on aeration tank running water ripple state texture analysis, to achieve real-time monitoring of the sewage treatment equipment operation status, so that regulatory authorities can achieve monitoring based on this for the sewage treatment equipment illegal shutdown.

Aeration tank video intelligent analysis fully integrated into the monitoring server, as a new type of alarm monitoring server input, perfectly adapts to the sophisticated alarm response capabilities of the monitoring server, stable and reliable to achieve a rich video surveillance alarm linkage function.

Aeration tank video intelligent analysis full account of the ease of application, based on a large number of practical applications, the parameter setting range is optimized to a minimum size, all kinds of difficult to understand options hidden in the program, users do not have to master a variety of setting options and distressed.

Figure (3) Aeration tank monitoring video intelligent analysis settings and working conditions

The intelligent search function is based on the same video intelligence analysis algorithm of real-time monitoring, the playback uses it to achieve a powerful and efficient after-the-spot supervision methods, based on strict real-time monitoring alarm, for a specific target event for fast secondary search. During the search process, you can change the search object and parameters, intelligently filter out useful video event information in the massive video data, which can greatly reduce the work intensity and improve the work efficiency.

Figure (4) Aeration tank monitoring video files intelligent search function

Aeration tank video intelligent analysis is another successful practice of video image processing technology in the field of environmental monitoring with high accuracy, strong anti-interference ability, easy installation and deployment, It is an effective tool for relevant departments to further strengthen environmental monitoring.

About the powerful Taichen VMS platform itself, please refer to our other related topics, this article will not repeat them.

5. Video Intelligence Analysis and Environmental Data Acquisition Machine

Video intelligence analysis and environmental data acquisition machine, is video intelligence analysis technology and conventional environmental monitoring technology perfect unity. In such an integrated machine, Integrated with the video recording and storage of Taichen VMS platform, remote video data access, aeration tank video intelligent analysis, standard industrial Modbus sensor data collection and status reporting module. The data acquisition module supports the HJ-212 standard, which can fully meet the requirements of information access and data sharing for various complicated environments in the field of environmental monitoring.

Figure (5) Environmental monitoring data acquisition module settings and working conditions

Figure (6) Video intelligent analysis and environmental monitoring data acquisition machine application

6. Application of Video Surveillance Management Platform in Environmental Monitoring

In addition to front-end video intelligence analysis and data acquisition integrated machine, Taichen VMS platform itself is a very versatile video surveillance software system, has been widely used in various fields of the national economy, act as the framework of various monitoring system functions in a variety of complex business needs and network environment. With the cooperation of the video intelligence analysis and data acquisition integrated machine, such a powerful monitoring and management platform will be able to play an more important role in safety supervision.