OZONIZATION PURIFICATION OF INDUSTRIAL PLANTS WASTEWATER

Abstract

The results of industrial wastewater treatment with ozone are presented in the article. The optimal parameters from various factors of the process of wastewater treatment of nonferrous metallurgy enterprises of the Republic of Kazakhstan by a chemical method using oxidative neutralization were studied and determined. The depth of oxidation and the duration of ozonation are functions of the pH of the solution. deep purification of cyanides, thiocyanates, copper, zinc, lead, foaming agent (99-100%) has been achieved. Ozonation products of each toxic component of wastewater have been identified. The article shows that non-ferrous metals can be utilized in the process of ozonation of industrial wastewater. Ozone is able to react with organic and inorganic compounds until complete oxidation. During ozonation of wastewater, metal ions of low oxidation states form insoluble complex compounds and hydroxides that precipitate. However, ozonation has not only advantages, but also the following disadvantages: the formation of by-products, as well as the high initial cost of equipment. The advantages of ozone include the following: strong oxidant and disinfectant; very effective against viruses, which is especially important and relevant in the context of the Covid-19 pandemic. Ozonation is widely used for industrial waste water treatment and is relevant from an environmental point of view. Keywords: ozone, purification, wastewater, cyanides, thiocyanates, copper, zinc, lead, frother.