Motavaf Bita, Dean Robert A, Nicolas Joseph, Savage Phillip E
Department of Chemical Engineering, 121D Chemical and Biomedical Engineering Building, The Pennsylvania State University, University Park, PA 16802, United States.
Department of Chemical Engineering, 121D Chemical and Biomedical Engineering Building, The Pennsylvania State University, University Park, PA 16802, United States.
Bioresour Technol. 2021 Dec;341:125872. doi: 10.1016/j.biortech.2021.125872. Epub 2021 Sep 2.
We conducted Hydrothermal carbonization (HTC) of simulated food waste under different reaction conditions (180 to 220 °C, 15 and 30 min), with the aim of recovering both fatty acids from the hydrochar and nutrients from the aqueous-phase products. HTC of the simulated food waste produced hydrochar that retained up to 78% of the original fatty acids. These retained fatty acids were extracted from the hydrochar using ethanol, a food-grade solvent, and gave a net recovery of fatty acid of ∼ 50%. The HTC process partitioned more than 50 wt% of the phosphorus and around 38 wt% of the nitrogen into the aqueous-phase products. A reaction path consistent with decarboxylation predominated during HTC under all of the reaction conditions investigated. A path consistent with dehydration was also observed, but only for the more severe reaction conditions. This work illustrates the potential that HTC has for valorization of food waste.
我们在不同反应条件（180至220°C，15分钟和30分钟）下对模拟食物垃圾进行了水热碳化（HTC），目的是从水热炭中回收脂肪酸并从水相产物中回收营养物质。模拟食物垃圾的HTC产生的水热炭保留了高达78%的原始脂肪酸。使用食品级溶剂乙醇从水热炭中提取这些保留的脂肪酸，脂肪酸的净回收率约为50%。HTC过程将超过50 wt%的磷和大约38 wt%的氮分配到水相产物中。在所研究的所有反应条件下，HTC过程中以脱羧反应为主的反应路径占主导地位。还观察到了与脱水一致的反应路径，但仅在更严苛的反应条件下出现。这项工作说明了HTC在食物垃圾资源化方面的潜力。
