Characterization of the Extracted Macromolecules Chitin, Chitosan, Gelatin, Trypsin and Chymotrypsin from Aquaculture Processing Waste

Aquaculture, the cultivation of aquatic organisms such as fish, crustaceans, mollusks, and aquatic plants, has rapidly become a corner stone of global food production. The rise of aquaculture responds directly to the increasing global demand for seafood alongside the ongoing depletion of wild fish stocks, necessitating more sustainable methods to meet the nutritional requirements of a growing population. However, such rapid expansion concurrently presents a range of environmental and economic challenges, notably in the management and disposal of aquaculture processing waste. The processing of aquatic organisms results in significant waste generation including fish skin, viscera, scales, and exoskeletons. The traditional handling of aquaculture processing wastes, such as fish skin, viscera, and exoskeletons of crustaceans, often involves their disposal or use in low-value applications, contributing to environmental pollution and resource wastage. By focusing on the extraction and characterization of bioactive macromolecules from these wastes, this study not only provides a solution to waste management challenges but also opens up new avenues for the creation of high-value products. The extraction processes for the bioactive macromolecules from aquaculture waste, focusing on gelatin from fish skin, proteolytic enzymes from fish viscera, and chitosan from crustacean exoskeletons. It describes the optimization of extraction conditions, such as temperature, pH, and time, to achieve maximum yield and purity. The results of the extraction process are analyzed. This study focuses on the physico-chemical, biochemical, and structural characterization of the extracted bioactive macromolecules. Techniques such as Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), are employed to assess the properties of gelatin, proteolytic enzymes trypsin, chymotrypsin, chitin and chitosan. The results provide insights into the quality and potential applications of the extracted compounds, facilitating their use and subsequent utilization could lead to the development of innovative products that enhance human health, improve industrial processes, and contribute to environmental sustainability.