Modeling, Analysis and Automation of Wastewater Treatment by Electrocoagulation Method

Theoretical and applied principles of construction of an automated system of sewage treatment on the basis of a generalized spatial model of the process of electrocoagulation purification are proposed. A model of electrocoagulation, which describes the processes taking place in the reactor considering the spatial placement of plates is developed. The solution of the corresponding model problem has been obtained by an asymptotic method. A comparative analysis of the results of computer simulation with the results of full-scale experiment has been conducted. The effect of reactor size, current density, arrangement of electrode plates on the efficiency of chromium extraction was investigated. Comprehensive research has shown that a spatial mathematical model that describes the basic laws of wastewater treatment and the algorithm for solving a singularly perturbed problem is effective for carrying out performance-oriented defining (in particular optimization) the parameters of the treatment process. The obtained ratios are effective for optimizing the parameters of the purification process, in particular, the sizes of the electrocoagulation unit, etc., as well for conducting theoretical studies in cases of the predominance of convective and electrochemical components of the respective process over diffusion, that is typical for the vast majority of electrocoagulation units. The basic scheme of automation of the process of sewage treatment from chromium is constructed. A control system with the ability to change the performance of the entire installation in real-time using SCADA - WinCC Flexible system is provided.