Abstract
Food by-products contain a remarkable source of bioactive molecules with many benefits for humans; therefore, their exploitation can be an excellent opportunity for the food sector. Moreover, the revalorization of these by-products to produce value-added compounds is considered pivotal for sustainable growth based on a circular economy. Traditional extraction technologies have several drawbacks mainly related to the consumption of hazardous organic solvents, and the high temperatures maintained for long extraction periods which cause the degradation of thermolabile compounds as well as a low extraction efficiency of desired compounds. In this context, supercritical fluid extraction (SFE) has been explored as a suitable green technology for the recovery of a broad range of bioactive compounds from different types of agri-food wastes. This review describes the working principle and development of SFE technology to valorize by-products from different origin (marine, fruit, vegetable, nuts, and other plants). In addition, the potential effects of the extracted active substances on human health were also approached.
Highlights
During the production and processing of aquatic products, fruit, vegetables, and cereals, a huge amount of by-products are generated in the food industry
The results indicated that the use of supercritical fluid extraction (SFE) at low temperature resulted in a higher content of total fatty acids, mainly unsaturated, than the oil extracted with hexane
This review paper summarizes the application of supercritical fluid technology in the extraction of valuable compounds with potential effects on human health from comprehensive agricultural food processing by-products
Summary
During the production and processing of aquatic products, fruit, vegetables, and cereals, a huge amount of by-products are generated in the food industry. The low-temperature extraction conditions of supercritical fluids are very suitable for the recovery of biologically active compounds from agri-food by-products, allowing the recovery of thermolabile or oxidizable molecules [11]. This review aims to summarize the application of supercritical fluid extraction technology to recover natural active substances from food processing by-products and underutilized biological resources, as well as their beneficial effects on human health. Its moderate critical temperature makes it especially is that is gaseous at room temperature and pressure, so once the extraction is finished suitable for the extraction ofsystem, thermolabile molecules [12,17].obtaining Another anotable and by decompression of the the totalbioactive removal of CO2 is achieved, solvent-freeofextract need for at further purification treatments advantage.
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