Waste-free integrated processing of invertebrates into feed additives using proteolytic enzymes
Abstract
This paper presents a study on integrated and waste-free processing of various invertebrate species such as molluscs and crabs. The main focus is on the use of the proteolytic enzyme preparation ‘Krusenzyme’, isolated from crab liver, for the processing of raw materials. The study showed that the use of Crusenzyme was effective in removing skin from cephalopods, softening the muscle tissue of molluscs and deproteinising the shell of crabs. The enzymatic treatment improved the texture of the products, increased the yield of finished products and reduced energy consumption compared to traditional methods. The possibility of obtaining feed additives from mollusk processing wastes rich in proteins, calcium and microelements was also studied. It was shown that inclusion of flour from soft tissues and mollusk flaps in the diet of farm animals contributes to the increase in weight gain and improvement of productivity indicators. The developed technology allows to obtain a wide range of valuable products, including chitin, chitosan, fat, carotenoids and protein hydrolysates, contributing to environmentally safe production and rational use of hydrobiont resources.