Ostrea edulis, ext. is rich in oligopeptides, polypeptides, and amino acids; ultrafine pulverization of oyster shells can be used to produce calcium additives with good solubility and dispersibility. In the food industry, advanced processing using enzymatic hydrolysis, fermentation, and ultrafine pulverization techniques produces amino acid-rich condiments such as oyster sauce and soup bases, improving protein utilization and flavor. In other fields, oyster shells can be used to prepare oyster shell lime with dyeing properties, mixed with clay to prepare cement for building decoration, and can also be used to prepare feed additives, fertilizer additives, cement additives, paint additives, and soil conditioners.
