COMPLEX TECHNOLOGY OF PROCESSING SUNFLOWER MEAL TO PRODUCE PROTEIN CONCENTRATE AND SORPTION MATERIAL

Abstract

Sunflower meal is a multi-tonnage and promising secondary raw material of the fat and oil industry, the valuable property of which is a high protein content and relatively low cost. At the same time, the high concentration of chlorogenic acid (CGА) in sunflower meal and its ability to form dark-colored complexes with proteins during their extraction limits the use of vegetable protein of sunflower meal in the food industry. In this work, the processes of defenolization of sunflower meal with succinic acid under mild conditions (temperature, time, concentration), as well as the extraction of sunflower meal protein using a proteolytic enzyme preparation (EP) were studied. It was shown that washing sunflower meal with succinic acid solution allowed reducing the content of the mass fraction CGА in the protein extract to 2.35±0,47%, and the use of proteolytic EP to intensify the alkaline extraction process under mild conditions allowed to increase the degree of extraction of protein compounds of sunflower meal to 60±4.5%. Chemical activation, during protein extraction, created a porous structure and functional groups on the surface of the sorbent, which served as the basis for the use of waste from deep processing of meal (WFPOM) as a sorbent. The selected mode (temperature, pH, time) allowed to increase the sorption efficiency by Zn²⁺ – 99,9%, Cd²⁺ - 89%, Pb²⁺ - 80%, Cu²⁺ - 65%. The conducted research was the basis for the development of a resource-saving economically feasible technology for the complex processing of renewable plant raw materials - sunflower meal - to produce food products, as well as a sorbent for wastewater treatment from heavy metal ions (HMI).