OBTAINING COAGULANT FROM AUMINZATAU KAOLIN FOR PPM WASTEWATER PURIFICATION

This article is devoted to the development of methods for obtaining raw materials and coagulants based on Auminzatau kaolin at the Zarkuduk site and the treatment of highly coloured wastewater from the production of paper from rice and wheat straw. The yield of kaolin, treated with a 30 % hydrochloric acid solution at an optimum calcination temperature of 500°C for 90 min, was 97.5 %. The optimum temperature for the interaction of hydrochloric acid is 25 - 30°C for 30 - 45 min. The efficiency of the coagulant application is 97.5 %.