The problem of improving the process water treatment process quality in terms of changing parameters, dynamic modes of operation and disturbance environment by synthesizing and implementing optimal control during system operation based on intelligent identification and forecasting the state of controlled processes with control of major disturbances. A computer model of the electrocoagulation process with control according to the developed PID and P regulation laws has been developed. A comparative analysis of the system's efficiency at dynamically changing input pollution concentration is carried out.