METHOD OF PRODUCING ARTIFICIAL FEEDS FOR FISH Russian patent published in 1998 - IPC

FIELD: food industry. SUBSTANCE: method includes mixing prescription ingredients of feed mixture with fish flour and is distinguished by that, in order to increase quality of feed and to use it for producing non-conventional fish flour, the latter, prior to be mixed with prescription ingredients of feed mixture, is crushed to particle size 0.1-0.6 mm and washed with water at temperature 40-70 C, while continuously and uniformly adding urea in quantity 0.1-10% on flour weight. Washing is effected for 15-180 min under stirring with rotor speed 550-1200 rpm and at flour to water ratio from 1:4 to 1:10. EFFECT: improved quality of fish feed.