Affiliation:
1. Industrial University of Tyumen
2. Tomsk State University of Architecture and Building
Abstract
Electroplating plant sewage is characterized by high concentration of metals, suspended solids, acids, alkalis and other contaminants. The irregular inflows, low pH values and specific sewage composition complicate its treatment. The main treatment methods include chemical precipitation, ion exchange, chemical and electrochemical oxidation, flotation, filtration and membrane separation. The paper proposes a possible variant of wastewater treatment in a small electroplating plant. The proposed flow diagram includes sedimentation of polluting substances with sodium hydroxide and oxidation with anolyte. The method results in a 88.9 % reduction in chemical oxygen demand, 99.5 % reduction in suspended solids, 99.8 % reduction in iron, 95.7 % reduction in surfactants, and 99.9 % reduction in copper ions. The pH value of the treated water is 7.8 and matches the value of a slightly alkaline environment.
Publisher
Tomsk State University of Architecture and Building