Journal
WASTE AND BIOMASS VALORIZATION
Volume 12, Issue 11, Pages 6021-6033Publisher
SPRINGER
DOI: 10.1007/s12649-021-01435-9
Keywords
Coffee silverskin; CO2 supercritical fluid; Fat; Fatty acids; Circular chemistry; Mathematical modelling
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Funding
- Universita degli Studi di Milano within the CRUI-CARE Agreement
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Recovering agro and food-industrial waste and extracting value-added components from coffee silverskin using supercritical fluid extraction technique showed reduction in extraction time, organic solvent use, and energy consume. A mathematical model was developed for possible industrial scale-up, indicating high investment for the apparatus is compensated by several benefits.
Recovery of agro and food-industrial waste and their valorisation via green technologies can help to outline new concepts of industrial strategies. In this contest, a fat enriched of added-value components was extracted from coffee silverskin by applying a supercritical fluid extraction technique (sc-CO2). An appropriate modulation of process parameters like temperature (T = 35, 50, 60 degrees C) and pressure (p = 200-300 bar) influences the fat yield and the chemical composition, opening the way for targeted extraction. The extraction time, the organic solvent use and the energy consume were reduced compared to Soxhlet. Moreover, a mathematical model was constructed based on the experimental data collected, employed apparatus, and physico-chemical characteristics of biomass, pointing to a possible industrial scale-up. The experimental results are accompanied by a preliminary cost of manufacturing (COM), highlighting how the high investment for the apparatus is compensated by several benefits. [GRAPHICS]
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