CAST segmenting water feed reinforced denitrification process control system
A process control system, a technology of staged water inflow, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. Nitrogen removal efficiency and other problems, to achieve the effect of low cost, convenient management and operation, and solve the improvement of operating costs
Active Publication Date: 2009-04-08
BEIJING UNIV OF TECH +1
View PDF0 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the quality of raw water fluctuates and is not fixed. Obviously, this fixed operation mode is not an optimized way.
For example, when the concentration of pollutants in the influent water is higher than the average concentration, if the water inflow time of 2 hours remains unchanged and the aeration rate remains unchanged, then the aeration reaction ti
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0045] The actual domestic sewage discharged from a family area of a university was used as the experimental object (pH=6.5~7.8, COD=260~350mg / L, TN=60~85mg / L, TP=3.5~6.8mg / L). The selected CAST reactor has an effective volume of 18L, the initial MLSS in the reactor is 3.5-4.0g / L, and the aeration rate is constant at 0.25m 3 / h, the mud age is maintained at about 10d, and the reaction temperature is 23°C. Using the CAST segmented water inlet to strengthen the denitrification process control system, the treated water volume is 6L, the number of segments is 3 times, the COD removal rate is over 85%, the total nitrogen removal rate is over 90%, the total phosphorus removal rate is over 90%, and the final effluent COD is less than 50mg / L, total nitrogen is less than 10mg / L, which is lower than the total nitrogen concentration required by the national first-level emission standards.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more PUM
Login to view more Abstract
The invention relates to a control system for a CAST segmental inputted water reinforced denitrification process, which is suitable for the treatment of industrial waste water containing nitrogen and the reinforced treatment of town sewage. The control system comprises a selector, a main reaction area, a water feeding pump, a stirrer, an immersed water stirrer, a reflux sludge pump, an aerator arranged on the bottom of the main reaction area, an air compressor connected with the aerator, a drain valve, a sludge discharge valve for discharging the excess sludge in the main reaction area, and ORP, pH sensors and an on-line control system connected with a computer. The on-line control system is connected with a time relay which is connected with the water feeding pump, the stirrer, the immersed water stirrer, the reflux sludge pump, the air compressor, the drain valve and the sludge discharge valve. The control system adopts an on-line control strategy to control the aerobic aeration time and anoxia stirring time in the biological denitrification process, thereby solving the problems of nitrification or incomplete denitrification caused by deficient aeration or stirring time and the problems of improved operating cost and energy waste caused by overlong aeration or stirring time.
Description
technical field [0001] The invention relates to a CAST (circulating activated sludge method) segmented water inflow enhanced denitrification process control system, which is suitable for nitrogen-containing industrial wastewater treatment and urban sewage enhanced treatment, and belongs to SBR (sequenced batch activated sludge method) and its modified process sewage Biological nitrogen removal technology field. Background technique [0002] The problem of eutrophication is one of the most important water pollution problems faced by countries all over the world. Although the treatment rate of urban sewage in my country has been continuously improved in recent years, the problem of eutrophication caused by nitrogen and phosphorus pollution has not been fundamentally solved. There is even a growing trend. my country's large freshwater lakes and coastal waters are moderately or severely polluted with eutrophication. In the newly promulgated "Pollutant Discharge Standards for Ur...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more Application Information
Patent Timeline
Login to view more IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 彭永臻马娟刘洋王丽马宁平
Owner BEIJING UNIV OF TECH
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap