METHOD OF PRODUCING GELATIN FROM POND FISH SCALES Russian patent published in 2012 - IPC C09H5/00 

FIELD: process engineering.

SUBSTANCE: invention relates to fish processing industry. Proposed method comprises collection of scales, sorting it, washing in water, destruction of fish scale protein substances, extracting it in water, livering and drying. Protein substances are destructed by proteolytic enzyme Protosubtiline "ГЗх" taken in amount of 1.0% of scale weight. Extraction is carried out in water on water bath at 55÷60°C for 2.5÷3 h at water-to-scale ratio of 1:1. Obtained extract is compacted and filtered, and directed for livering in refrigerator at 2÷4°C for 8÷10 h. Residue after first extraction is subjected again to extraction by water on water bath for 1.5÷2 h, at water duty of 1:1 at 65°C. Then, said residue is filtered and directed to concentration by freezing in refrigerator at -4÷6°C for 8÷10 h and livering. Gelatin jells are dried to residual moisture content of not over 12%. Then, gelatin is minced to particle size of not over 5 mm, packed and directed for storage and sale.

EFFECT: increase output of gelatin and olerease production costs.

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