METHOD FOR PRODUCING FOOD ADDITIVE FROM SEAFOODS Russian patent published in 1997 - IPC

FIELD: agriculture; may be used for feeding farm animals. SUBSTANCE: ground raw materials, wastes from dressing mollusks and urchins, overgrowings of collectors (2-12%) are treated with solution of hydrochloric acid at ratio raw material:solution of acid 1:1-1:3 up to 5.0-5.2 pH. Then residue is separated, washed by water, dried at temperature 40-60 C up to 10% of moisture, and ground, for receiving protein-mineral product using as food additive. Saturated solution of calcium hydroxide is introduced in liquid phase at mixing up to 5.2-5.4 pH. Residue is separated, washed by water, and died at temperature 40-90 C. EFFECT: higher efficiency.