Duck blood is one of main byproducts of poultry slaughtering and contains many kinds of nutritional ingredients such as protein and ferroheme, so it＇s significant to study on duck blood. The hydrolysis of duck blood using alkaline protease was investigated. The orthogonal test was used to optimize the reaction conditions for enzymatic hydrolysis of duck blood based on a single factor test as follows： reaction temperature 50℃ enzyme/substrate 8 000 U/g, substrate concentration 7%, pH 10 and reaction time 2 h. Under these conditions, the content of solubl...
