Abstract:In China the resource of the scallop mantle which is rich in proteins is so abundant that there is much to do to utilize them adequately. Combinations of any two of neutral protease (AS1.398), trypsin and compound protease were used to hydrolyze the mantle of Chlamys farreri. The free amino acid nitrogen (AAN) in enzymolysis liquid was chosen as indictor of enzymolysis degree. By orthogonal experiments, effects of enzyme amount, reaction time, temperature and the type of proteases on the hydrolysis of the mantle were investigated. The best hydrolysis condition was optimized and then used to prepare amino acid nutrition powder by spray drying.The analysis results showed that in this product there was 82.89 % crude protein, 1.55% crude fat and 6.82% total sugar. Furthermore, it contained all kinds of amino acids，and the content of total amino acids and free amino acids in 100g crude protein was 79.06g and 51.53g.
