Effects of process parameters on the degradation of high salinity industrial wastewater

Abstract

High salinity wastewater is characterized by high salt content, a large number of organic pollutants and difficulty in biochemical degradation, which has become a major problem in industrial wastewater treatment. In this article, the electrochemical oxidation technology was used to treat high salinity wastewater. The effects of temperature, current density, pH and additives on the removal effect of high salinity wastewater were investigated to optimize the process parameters. The results show that the best degradation effect is when the current density is 21.43 mA cm−2, pH = 2, the temperature is 60 °C, and electric field activates additional persulfate. After purification of high salt wastewater, the evaporated salt can be utilized as a resource. The industrial cost of degradation was estimated, and its economic benefits were calculated. This work will provide a theoretical and experimental basis for treating high salt wastewater by boron-doped diamond (BDD) electrochemical degradation technology. HIGHLIGHTS BDD + PS System can efficiently degrade organic matter with low energy consumption but high cost.; After purification of high salt wastewater, the evaporated salt can be utilized as resources.; The industrial cost of degradation was estimated and its economic benefits were calculated.;

Keywords

• boron-doped diamond electrode
• electrochemical oxidation
• high salinity industrial wastewater