Research on the Relationship between the Productivity of Antarctic Krill Chitin and Its Fineness of Grind

It has been proved that chitin content in Antarctic krill is much higher than other marine shelled organisms; therefore, people pay much more attention to the extraction and application of the chitin in Antarctic krill. During the experiments which use the traditional acid and alkali method to extract the chitin from Antarctic krill, the chitin’s extraction efficiency was found out to have a great influence on the degree of grinding the shell. After testing and then come to a conclusion that based on the chitin content: extraction efficiency, concentration and dosage of the acid and alkali as well as many other factors, the material’s fineness should be within forty mesh. And the optimum process conditions are: alkali treatment: concentration 25%, solid-liquid ratio 1:10, temperature 95°C, 2 hours; acid treatment: concentration 10%, solid-liquid ratio 1:10, temperature 60°C, 2 hours. By this way, 94.254% high-purity chitin was produced.