MODIFICATION OF SOLID FEED FOR FISH BREEDING

摘要

PROBLEM TO BE SOLVED: To provide a method for modifying a solid feed to impart the precipitatability to dry or expanded pellets by impregnating them with a polyoxyethylene sorbitan fatty acid. SOLUTION: This solid feed is impregnated with preferably 0.1 to 5 wt.%, based on the solid feed, of a polyoxyethylene sorbitan fatty acid ester. It can be impregnated with a 0.1 to 20% aqueous solution of a polyoxyethylene sorbitan fatty acid ester. It is preferable to dry the solid feed impregnated with a polyoxyethylene sorbitan fatty acid ester under heating at a temp. of 70 to 100 deg.C. The fatty acid has preferably a carbon number of 12 to 18, and may be saturated or unsaturated. Degree of esterification of sorbitan fatty acid ester is, e.g. 1 to 4.