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 °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.

Graphic Abstract

中文翻译：

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咖啡焙烧副产物的增值：超临界CO 2萃取回收银皮脂肪

通过绿色技术回收农业和食品工业废料并对其进行估价，可以帮助概述新的工业战略概念。在本次比赛中，采用超临界流体萃取技术（sc-CO _2）从咖啡银皮中提取了富含增值成分的脂肪。）。适当调节过程参数，例如温度（T = 35、50、60°C）和压力（p = 200–300 bar），会影响脂肪产量和化学成分，从而为目标提取开辟了道路。与索氏萃取法相比，萃取时间，有机溶剂的使用量和能耗降低了。此外，基于收集的实验数据，使用的设备和生物质的理化特性，构建了数学模型，指出了可能的工业规模扩大。实验结果伴随着初步的制造成本（COM），突显了如何通过多种好处来补偿设备的高额投资。

图形摘要