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In 2018 the squid catch in the Russian Federation amounted to about 102 thousand tons. Different kinds of products are made from squid (dried, air-dried and smoked squid, preserves, canned food, culinary products), but frozen squid makes a great part of them. In the production of squid carcasses, about 52.3% of waste is generated, of which 23.2% accounts for the liver and 76.8% for the entrails, tentacles and head. Therefore, about 54 thousand tons of waste is generated annually, where 41 thousand tons accounts fo...