The purpose is to achieve a more intelligent sewage detection in the process of sewage treatment, and further improve the accuracy and immediacy of monitoring data. This paper takes the PLC platform produced by Allen-Bradley Company as the main research object and basic monitoring instrument to detect the PH value and COD value in the treated sewage. Through the optimal design of DCS structure and communication network level in sewage treatment system with PLC as platform, a better sewage monitoring effect has been achieved.
