RESEARCH ON THE DISPOSAL OF ACIDIC WASTEWATER FROM THE SEPARATION OF FATTY ACIDS FROM COTTON SOAPSTOCK IN THE OIL INDUSTRY

Abstract

When raw cottonseed is processed, the resulting crude oil is subjected to refining to precipitate free fatty acids. If from 1 ton of seeds 18% crude oil is obtained, and from the same oil 9% of the total soapstock is extracted. The process of converting soap stock into fatty acids is accompanied by copious amounts of acidic runoff. This article presents the results of a study of wastewater treatment for the production of crude fatty acids using the sulfuric acid method.The mineralized mass of phosphorites of the Central Kyzylkum was used as a neutralizing agent. After neutralization and separation of phosphorite sediment, the water was further purified with coagulants such as Al₂(SO₄)₃, Fe₂(SO₄)₃, FeCl₃ and PAA. It was found that after the use of aluminum sulfate, the indicators observed a decrease in hardness from 9.91 to 8.83 mEq/l, turbidity from 4.3 to 3.4; COD from 280 to 86, and pH from 8.80 to 8.40, and on the other hand, an increase in the degree of purification from 86.12 to 89.03%. The optimal dose of coagulants can be considered 4 g/l.