Journal
3 BIOTECH
Volume 11, Issue 8, Pages -Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s13205-021-02912-7
Keywords
Deproteination; Proteases; Chitin; Shellfish waste
Categories
Funding
- Kerala State Council for Science, Technology and Environment
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Shellfish wastes are generated globally due to mass consumption, with current chemical treatment using hazardous chemicals for chitin recovery posing environmental risks. The potential of enzymes in degrading shellfish wastes for chitin recovery remains largely unexplored.
Several tonnes of shellfish wastes are generated globally due to the mass consumption of shellfish meat from crustaceans like prawn, shrimp, lobster, crab, Antarctic krill, etc. These shellfish wastes are a reservoir of valuable by-products like chitin, protein, calcium carbonate, and pigments. In the present scenario, these wastes are treated chemically to recover chitin by the chitin and chitosan industries, using hazardous chemicals like HCl and NaOH. Although this process is efficient in removing proteins and minerals, the unscientific dumping of harmful effluents is hazardous to the ecosystem. Stringent environmental laws and regulations on waste disposal have encouraged researchers to look for alternate strategies to produce near-zero wastes on shellfish degradation. The role of enzymes in degrading shellfish wastes is advantageous yet has not been explored much, although it produces bioactive rich protein hydrolysates with good quality chitin. The main objective of the review is to discuss the potential of various enzymes involved in shellfish degradation and their opportunities and challenges over chemical processes in chitin recovery.
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