Mining marine shellfish wastes for bioactive molecules: chitin and chitosan--Part A: extraction methods

Area of Science:

• Biotechnology
• Marine Biology
• Biochemistry

Background:

• Marine processing waste disposal faces legal, cost, and environmental challenges.
• Shellfish waste, primarily crustacean exoskeletons, is a key source for chitin production.
• Chitin derivatives like chitosan possess valuable properties such as polyelectrolyte nature and high adsorption capacity.

Purpose of the Study:

• To review methods for extracting and characterizing chitin, chitosan, and glucosamine from shellfish waste.
• To consolidate information on industrial, microbial, and enzymatic hydrolysis techniques.
• To highlight the potential of these biomolecules as valuable by-products.

Main Methods:

• Review of industrial hydrolysis methods for chitin and chitosan extraction.
• Analysis of microbial hydrolysis techniques for biomass conversion.
• Examination of enzymatic hydrolysis processes for producing glucosamine and derivatives.
• Characterization techniques for purity and structural analysis.

Main Results:

• Shellfish waste is a viable source for chitin, chitosan, and glucosamine.
• Various hydrolysis methods (industrial, microbial, enzymatic) yield these compounds with differing efficiencies.
• Chitin derivatives exhibit versatile properties suitable for diverse applications.

Conclusions:

• Biotechnological extraction of chitin derivatives from shellfish waste offers a sustainable solution to waste management.
• The unique properties of chitin, chitosan, and glucosamine enable their use in various high-value applications.
• Further research into optimizing extraction and characterization methods is warranted.