METHOD FOR SEPARATING AND RECOVERING EGGSHELL AND EGGSHELL MEMBRANE, AND APPARATUS FOR SEPARATING AND RECOVERING EGGSHELL AND EGGSHELL MEMBRANE

摘要

PROBLEM TO BE SOLVED: To provide a method for separating and recovering eggshells and eggshell membranes whereby eggshells and eggshell membranes can be separated and recovered with high recovery efficiency without causing denaturation of proteins in the eggshell membranes, and to provide an apparatus thereof.SOLUTION: An apparatus for separating and recovering eggshells and eggshell membranes includes an eggshell case 3 for storing eggshells 1 and a pressure-resistant tank 10 for storing a cooled and pressurized aqueous carbonic acid solution P. A gas nozzle 14 for blowing carbon dioxide gases into the aqueous solution retained in the pressure-resistant tank 10 to produce an aqueous carbonic acid solution P is provided. A mixing blade 13 for mixing the aqueous solution and the carbon dioxide gas in the pressure-resistant tank 10 and averaging the concentration of the aqueous carbonic acid solution P is provided. A magnet coupling 20 is mounted at the upper end part of a lid 12. The mixing blade 13 is rotated by an air motor 30 mounted through the magnet coupling 20. The eggshell case 3 storing the eggshells 1 is entirely immersed in the aqueous carbonic acid solution P of the pressure-resistant tank 10. Separated eggshell membranes 2 on the eggshell case 3 and the eggshells 1 after separation are recovered, respectively.