| 초록 |
The progressive increase of food waste causes excess consumption of water and fossil fuels, CO2 emissions from decomposing food, and contamination of soil and groundwater. On the other hand, food waste can be used as a source of carbohydrate, protein, and lipid. In this work, extraction of lipids from food waste using deep eutectic solvents (DES) was investigated. DES, eutectic mixtures of an ammonium salt and a hydrogen bond donor such as choline chloride and urea, have recently gained great interest as extraction solvent, because of their non-volatility, non-toxicity, and cheap price. Several DES homogenized or dissolved food waste leaving lipids insoluble, and then floated undissolved lipids were easily recovered with n-hexane. The lipids were most efficiently extracted from food waste by using choline chloride and glycerol mixture at a ratio of 1:2. In addition, extracted lipids were highly pure and could be successfully used to produce biodiesel. |
