METHOD OF PRODUCTION OF FISH OIL FROM SECONDARY SMOKED FISH RAW MATERIALS Russian patent published in 2023 - IPC A23L17/00 A23D9/00 

FIELD: food industry.

SUBSTANCE: method involves grinding raw materials, which are smoked fish raw materials, mixed with water at a fish raw material:water ratio of 1:1–2 at a temperature of 60–100°C, primary separation of fat by centrifugation at 3,500–4,000 rpm. Enzymatic hydrolysis is carried out with a proteolytic enzyme preparation of collagenase action, taken in an amount of 0.2–0.5% by weight of the raw material, at a temperature of 50–55°C for 60–90 minutes. Heat treatment is performed at a temperature of 120–170°C and pressure of 2–10 bar for 1–4 hours, then cooling is performed to 60–80°C and secondary separation of fat is performed by centrifugation at 3,500–4,000 rpm. After mixing, the resulting fat is additionally treated with activated carbon added in an amount of 0.7–1.0% by weight of the fat and kept for 40–60 minutes at a temperature of 45–55°C, after which the purified fat is separated.

EFFECT: invention makes it possible to increase the efficiency of extracting fish oil from secondary smoked raw materials and at the same time increase its safety to a food level, due to a combination of enzymatic and thermal hydrolysis of raw materials under certain modes that allow the removal of peroxide compounds and toxic smoking components, and additional processing of the isolated fat with an adsorbent under given parameters.

1 cl, 2 tbl, 14 ex