The organic calcium can be acquired by two ways: one is to calcine, and the other is to add organic acid into eggshell power directly.

• 通过煅烧法和直接反应法可以将蛋壳中的碳酸钙转化为有机酸钙,蛋壳是一种很好的食品级绿色钙源,发展前景广阔。