| 摘要 |
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 "ôùà" taken in amount of 1.0% of scale weight. Extraction is carried out in water on water bath at 5560C for 2.53 h at water-to-scale ratio of 1:1. Obtained extract is compacted and filtered, and directed for livering in refrigerator at 24C for 810 h. Residue after first extraction is subjected again to extraction by water on water bath for 1.52 h, at water duty of 1:1 at 65C. Then, said residue is filtered and directed to concentration by freezing in refrigerator at -46C for 810 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. ^ 1 tbl, 2 ex |
