METHOD OF OBTAINING FOOD ADDITIVES FROM SECONDARY FISH RAW MATERIALS USING HYDROLYSIS Russian patent published in 2019 - IPC A23L17/00 A23L33/18 A23L33/115 A23J1/10 

FIELD: biotechnology; food industry.

SUBSTANCE: invention is directed to the production of food additives of lipid, peptide and mineral-protein composition out of the secondary fish raw materials. In the method involving the grinding of raw materials, homogenization, degreasing, enzymatic hydrolysis, heat treatment, cooling and drying, homogenization is carried out simultaneously with the enzymatic hydrolysis in the 5–10 % aqueous-alcoholic solution of peppermint leaf extract with the solids content of 0.5–0.8 % with the ratio of fish raw materials:solution 1:1–1:2 with the addition of crushed fish insides in the amount of 5–10 % by weight of fish raw materials and temperature 0…(+5) °C for 24–48 hours. Heat treatment of the enzymatically hydrolyzed mixture is carried out at the temperature of 150–170 °C and at the pressure of 10–12 bar for 2–4 hours. Then the mixture is cooled in two stages, first to the temperature of 30–40 °C, after which the cooled mixture is fractionated by centrifugation at 3,500–4,000 rpm, then to the temperature of minus 5–10 °C. Cooled mixture is degreased by removing the upper fractional layer of the separated mixture, obtaining a nutritional supplement of lipid composition, and the remaining fractions are divided into peptide and mineral-protein products, which are dried to the moisture content of 4–8 %, receiving, respectively, nutritional supplements of peptide and mineral-protein composition.

EFFECT: proposed method allows to obtain food additives from fish secondary raw materials with high organoleptic characteristics, high biological value and long shelf life.

1 cl, 1 tbl