Towards green extraction methods from microalgae learning from the classics

Abstract

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Experimental Design and Optimization of Recovering Bioactive Compounds from Chlorella vulgaris through Conventional Extraction

“…During algae-based extraction of bioactive compounds, toxic and hazardous organic solvents (e.g., acetone, methanol, diethyl ether, chloroform, hexane) are commonly used [ 29 ]. However, the necessity to develop sustainable processes, especially in the fields of food, nutraceuticals, pharmaceuticals, and cosmetics, requires compliance with the concept of “green” chemistry and “green” extraction.…”

Evaluation of Nutraceutical Properties of Eleven Microalgal Strains Isolated from Different Freshwater Aquatic Environments: Perspectives for Their Application as Nutraceuticals

“…Indeed, some conventional extraction procedures are time- and cost-consuming and are not able to preserve the residual biomass or the original characteristics of some extracted molecules. In the last several decades, many different extraction techniques have been developed and studied, with an increasing interest in those classified as “green” and “environmentally friendly” (for a review, please see [ 50 ]). These, namely comprehending switchable solvents, compressed fluid extractions, and microwave-assisted extraction, not only help to obtain different classes of molecules with high purity but also have a very low environmental impact.…”

Lipids from Microalgae for Cosmetic Applications

“…Nowadays, conventional extraction techniques involve the use of organic solvents for a long time and also the use of dry biomass as a starting material. New techniques are being developed which do not require the involvement of toxic solvents, reduce the extraction time, improve the extraction yields without affecting the biological activity, and minimize environmental impact [146].…”