engleski

Toward Green Extraction Processes

Sustainable engineering is rapidly becoming a used term in many research studies. Regarding extractions, there are well-known conventional extractions and most recently used alternatives (nonthermal and advanced thermal processing extraction techniques). Alternative techniques are often green, they showed the potential to increase the yield of extracted components, decrease the extraction time, and use lower temperatures. They are usually used for the extraction of thermolabile and unstable compounds. When talking about green sustainable extraction processing, one needs to take into account solvent selection, process safety, energy savings, environmental impact, economic aspects, and the possibility to scale up to industrial level. Future sustainable solvents need to be characterized by diverse chemical compositions and a broad range of physicochemical properties to meet the diversified needs of the process industry. Several green chemistry metrics have been developed to provide a holistic assessment of sustainability, which can be applied also to green extraction processes. Energy-efficiency metrics have been developed to cope with energy-intensive processes, as the extraction process from plant matrices frequently can be. The holistic approach is represented by environmental-impact metrics, based on life-cycle analysis (LCA) approaches, which are characterized by a complex evaluation of all the stages of the production. Energy-efficient technologies must be employed to extract the compounds of interest from biomass. Several case studies of green extraction processes are given.

green extraction ; sustainability ; sustainable recommendations ; solvent selection ; life cycle assessment ; case studies

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