Electrochemistry is the part of science which deals with the interrelationship of electrical currents, or voltages, and chemical reactions, and with the mutual conversion of chemical and electrical energy.

ECA is based on a new, previously unknown law of anomalous changes of reaction and catalytic abilities of aqueous solutions subjected to electrochemical unipolar (either anodic or cathode) treatment. ECA of solutions is necessarily associated with alteration of their chemical composition, acidity and (or) alkalinity within a wide range.

That is why ECA application makes it possible:
- to exclude from routine technological processes the regulation of solution properties with costly reagents;
- to improve quality of the treated substances;
- to reduce the number and duration of technological operations;
- to decrease their labour-consuming nature;
- to facilitate and simplify processes of water and sewage purification.