Department of Chemical Engineering, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain; Department of Civil and Environmental Engineering, University of Florence, via di S. Marta 3, 50139 Florence, Italy.
Department of Chemical Engineering, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain.
Waste Manag. 2022 Apr 1;142:9-18. doi: 10.1016/j.wasman.2022.02.003. Epub 2022 Feb 11.
Here we studied energy valorization of food waste by hydrothermal carbonization coupled with anaerobic digestion. Hydrothermal treatment was carried out at 200 °C and 230 °C for 1 h, obtaining hydrochar with properties suitable for solid biofuel according to ISO/TS 17225-8. The increase in temperature improved the fuel properties of hydrochar (higher heating value 20.3 and 23.7 MJ kg, fuel ratio 0.33 and 0.37, energy density 1.07 and 1.25). The anaerobic digestion of process water achieved methane yields around 150 mL CH STP g COD and made it possible to remove some specific recalcitrant compounds, such as 2-methylpyridine and 2-ethyl-3-methylpyrazine. Energy recovery from hydrochar and process water seems to be an interesting alternative way to sustain the process energetically and economically, despite the significant energy inputs required for hydrothermal carbonization.
在这里，我们研究了通过水热碳化结合厌氧消化来实现食品废物的能量增值。水热处理在 200°C 和 230°C 下进行 1 小时，得到了根据 ISO/TS 17225-8 适合固体生物燃料的水炭。温度的升高提高了水炭的燃料特性（高热值 20.3 和 23.7 MJ kg，燃料比 0.33 和 0.37，能量密度 1.07 和 1.25）。工艺水的厌氧消化实现了约 150 毫升 CH STP g COD 的甲烷产率，并使一些特定的难降解化合物（如 2-甲基吡啶和 2-乙基-3-甲基吡嗪）得以去除。尽管水热碳化需要大量的能源投入，但从水炭和工艺水中回收能源似乎是一种有趣的替代方法，可以在能量和经济上维持该过程。
