Abstract
Sustainability and renewability are demanding the most important challenges that need to be achieved. Therefore, microalgae and Natural deep eutectic solvents (NaDEs) are two classes that deserve particular attention that can allow to meet the sustainability. Microalgae, as raw materials, can produce a variety of value-added compounds, which have numerous applications in pharmaceutical, nutraceutical and cosmetics sector. While, NaDES have peculiar characteristics that allow the recovery of various value-added compounds from microalgae biomass in sustainable manner. Microalgal compounds can be extracted using organic acids, alcohols or sugars by employing the NaDES process. These solvents act as are non-toxic, non-volatile and renewable during NaDES process. Considering the properties shown by microalgae and NaDES separately, a combined microalgae-NaDES extraction is extremely promising for future industrial applications. However, this technology requires proper pre-treatment of microalgal biomass to attain the complete recovery of valuable compounds. In conclusion, this review summarize the potential application of NaDES for extraction of intracellular compounds from microalgal biomass and their related pre-treatments to improve the extraction efficiency.
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