METHOD FOR PREPARING PROTEIN FOR FEED-STUFF OR FOOD FROM BY-PRODUCT OF GELATIN FILM

摘要

PURPOSE: Provided is a preparing method of amino acid and peptide for feed-stuff or food from by-product of gelatin film. Thereby environmental pollution caused by the gelatin can be solved. CONSTITUTION: A method for preparing protein for feed-stuff or food comprises pre-treating step, hydrolysis step and purification step. The pre-treating step consists of dissolving by-products of gelatin film generated when capsules are synthesized, in water and separating the aqueous solution of gelatin by discrepancy in specific gravity. The hydrolysis step consists of hydrolyzing the separated aqueous solution of by-products of gelatin film, according to hydrolysis by enzyme, alkali or acid, to produce amino acid or peptide. The purification step consists of separating impurities such as trace residual pigment and glycerine from the amino acid or peptide by chromatography, ion-exchange or dialysis.