Supercritical fluid extraction applied to food wastewater processing

Considering the composition of food industry wastewater and sludge, with potential application in the industry and medicine (e.g., pigments, lipids, protein), this chapter brings an overall idea of using supercritical fluid extraction (SFE) to recover such compounds. Despite the scarce literature related to this topic, some studies have shown the possibilities of SFE application, mainly using supercritical CO2. In addition, it reports some evidence that SFE seems to be a promising technique to help industries to adhere to the legislation that applies to food wastewater and sludge disposal.