ABSTRACT
The potential use of chitin and chitosan is widely recognized, and many new applications have been developed. Currently, chitin, chitosan, and their derivatives are widely used in chemistry, medicine, pharmacy, cosmetics, food technology, water treatment, etc., but the use is restricted to specific applications because of the high price of technical-grade chitin and chitosan. A prerequisite for the greater use of chitin in industry is cheap manufacturing processes, or the development of profitable processes to recover chitin and byproducts such as protein pigments or carotenoproteins, if crustacean-processing waste products are used as starting material.
