Investigation of the ozone treatment effectiveness of urban wastewater containing biologically-resistant organic pollution

Abstract

Abstract When developing the technology of using ozone for the subsequent purification of municipal wastewater from biologically resistant organic pollutants, it is important to determine the required ozone dose and the duration of oxidation. Post-treatment of wastewater after biological treatment is used, for example, for the destruction of biologically resistant textile dyes and surfactants. It is known that, for example, during the process of ozonation, decrease in color occurs earlier than the decomposition of the organic matter of the dyes. Therefore, the water treatment process is controlled by several indirect indicators, such as oxidation, total organic carbon, etc. It is difficult to determine the necessary dose of ozone for the decomposition of pollutants. We carried out the experimental studies and examined the material balance of the process of destruction of pollution by ozone. A method is proposed for measuring and calculating ozone consumption in the destruction of pollution in wastewater. According to the results of test ozonation of waste water, the dependence of ozone consumption on the processes of pollution destruction is built. The method allows to determine the required specific dose of ozone for the destruction of pollution and the duration of ozonation for equipment design.