Abstract
In order to achieve the optimization of the CANON process, ensuring the stability of water quality and increasing the removal rate of ammonia nitrogen, the stability of CANON process water quality under real-time control was studied in the SBR reactor. During the experiment, the temperature was controlled at 30℃±1℃ and the pH was 7-8, based on the corresponding relationship between indirect parameters and nitrogen pollutants, the real-time control strategy was formulated. The results showed that when the influent ammonia nitrogen concentration was 917-1540 mg·L-1, the residual ammonia nitrogen concentration of 6 mg·L-1 can be used as the control parameter to meet the requirements of process stability but the ammonia nitrogen sensor had many problems such as high costs and large errors. The characteristic points and platforms of pH, DO, and ORP value can be the automatic control parameters, which can maintain the long-term stable operation of the CANON process and ensure that the average ammonia nitrogen removal rate is above 99% and the effluent quality is stable.
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