Elaboration of an Efficiency Indicator of Treatment Industrial Waste Water by Ozone

While developing the technology of using ozone for the destruction of organic substances in industrial wastewater, it is important to determine the required dose of ozone and the period of water treatment. In some cases, for example, when the dyes are destroyed in textile sewage, the color reduction occurs earlier than the decomposition of the organic matter of the dyes. Thus, there is a need to control the purification process by several indirect indicators, such as oxidability, total organic carbon content and etc. There is also the difficulty in determining the required dose of ozone for the decomposition of contaminants. We carried out experimental researches and examined the material balance of the ozonation process. A generalized method for determining the consumption of ozone in the oxidation of contaminants in sewage waters is proposed. The indicator "chemical demand of ozone" is used. During the trial ozonation of waste water the method allows to obtain the dependence of ozone consumption on the processes of pollution destruction and to determine the required specific dose of ozone for the destruction of contaminants.