Bulletin of
Vitebsk State
Technological
University

abstract

The object of the research is the environmental safety of textile industries. The purpose of the work is to substantiate schemes for the combined treatment of multicomponent wastewater from textile industries discharged into public sewer networks, taking into account the regulatory requirements for maximum permissible concentrations of pollutants in aqueous solutions and minimizing financial costs for the creation of local treatment facilities (LTF). On the basis of the audit of real production, it was found that the indicators of wastewater changed non-stationary and non-linearly in terms of time depending on the range products: in terms of volume; on the quality of wastewater. Methodology and the pilot plant have been developed for conducting research on the treatment general plant and wastewater treatment using FeCl3 coagulation, ozonation, ferrate exposure based on the use of electrochemical reactor; during intensification processes by ultraviolet irradiation and ultrasonic exposure. Analysis of the experimental results showed that in all treated wastewater samples, except for the wastes of the Optima unit, it is possible to effectively reduce pH by introducing acid-containing FeCl3 coagulant. However, the required quality of oxidation organic pollutants in textile production wastewater was achieved only with the use of electrolysis plant by synthesizing ferrate compounds (reduction chemical oxygen demand by almost 7 times). The results made it possible for the first time to substantiate the scheme for the combined treatment of wastewater from textile industries using AOPs technologies and minimizing the use of chemical reagents while reducing the total cost of LTF. It is emphasized that it is promising to create system for collecting information on wastewater disposal.

Scheme for Combined Wastewater Treatment of the Textile Productions Using AOPs-Technologies