Composing functional food from agro-forest wastes: Selectively extracting bioactive compounds using supercritical...

Area of Science:

• Food Science
• Green Chemistry
• Natural Product Chemistry

Background:

• Agro-forest wastes are rich sources of bioactive compounds.
• These compounds offer benefits for food nutrition, safety, and health.
• Supercritical fluid extraction (SFE) with carbon dioxide (SC-CO2) is a promising green technology for their isolation.

Purpose of the Study:

• To review advances in SFE for extracting bioactive compounds from agro-forest wastes.
• To analyze parameters influencing solubility and extraction yield.
• To evaluate the bioactivity of extracts for functional food applications.

Main Methods:

• Supercritical fluid extraction (SFE) using SC-CO2.
• Systematic variation of SFE parameters (pressure, temperature, flow rate, time, co-solvents).
• Analysis of extraction yields and compound profiles based on co-solvent composition.

Main Results:

• SFE without co-solvents efficiently extracted low-polarity compounds like fatty acids and terpenoids.
• High-polarity compounds (phenolic acids, flavonoids, tannins, alkaloids) required co-solvents for extraction.
• Medium-polarity co-solvents significantly increased the yield of triterpenoids, flavonoids, and phenolic acids.

Conclusions:

• SFE with SC-CO2 is a versatile technique for bioactive compound extraction from agro-forest waste.
• Co-solvent selection is critical for optimizing the extraction of specific compound classes.
• The extracted compounds hold significant potential for development as natural functional food ingredients.