CAST segmenting water feed reinforced denitrification process control system

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...

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 time of 2 hours is insufficient; When the concentration of pollutants in the water is reduced, the aeration reaction time of 2 hours is too much and wasted

Moreover, although the aeration reaction time of 2 hours may meet the needs of nitrification reaction, the removal efficiency of total nitrogen will be affected due to insufficient anoxic denitrification time

Images