Methods for obtaining the feed additives from the starfish of the sea of Japan

Abstract

The results of scientific studies on the justification of the use of starfish of the Sea of Japan, Patiria pectinifera and Evastaerias echinosoma, in the technology of feed products are presented. The biotoxicity level of the studied objects was evaluated, its dependence on the season was determined. Two methods for the production of feed additives from starfish were defined, taking into account the bio-toxicity of starfish and the destination of finished products. The method of enzymatic hydrolysis (using the proteolytic enzymes) was recommended for non-toxic raw materials for obtaining the biologically valuable protein-mineral, protein and mineral feed additives. The method of combined hydrolysis (enzymatic in combination with thermal) allows the use of raw materials, characterized as “biotoxic”, with the aim of obtaining the safe protein and mineral feed additives. Technological parameters of the enzymatic (type and activity of the enzyme preparation, temperature, duration of hydrolysis and pH of the medium) and thermal (temperature, duration, pressure) hydrolysis methods are scientifically substantiated. Developed methods for the production of feed additives from starfish of the Sea of Japan provide feed additives that differ in chemical composition and purpose.