Abstract The influence of sewage sludge torrefaction temperature on fuel properties was investigated. Non-lignocellulosic waste thermal treatment experiment was conducted within 1 h residence time, under the following temperatures: 200, 220, 240, 260, 280 and 300°C. Sawdust was used as lignocellulosic reference material. The following parameters of biochar have been measured: moisture, higher heating value, ash content, volatile compounds and sulfur content. Sawdust biochar has been confirmed to be a good quality solid fuel. High ash and sulfur content may be an obstacle for biochar energy reuse. The best temperature profile for sawdust torrefaction and fuel production for 1 h residence time was 220°C. At this temperature the product contained 84% of initial energy while decreased the mass by 25%. The best temperature profile for sewage sludge was 240°C. The energy residue was 91% and the mass residue was 85%. Higher temperatures in both cases caused excessive mass and energy losses.

中文翻译：

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从污水污泥中生产的生物炭是一种优质的固体燃料吗？

摘要 研究了污泥烘烤温度对燃料特性的影响。非木质纤维素废物热处理实验在 1 h 的停留时间内进行，温度如下：200、220、240、260、280 和 300°C。锯屑用作木质纤维素参考材料。已测量生物炭的以下参数：水分、较高的热值、灰分、挥发性化合物和硫含量。木屑生物炭已被证实是一种优质的固体燃料。高灰分和硫含量可能是生物炭能源再利用的障碍。木屑烘焙和燃料生产 1 小时停留时间的最佳温度曲线是 220°C。在此温度下，产品包含 84% 的初始能量，同时质量减少 25%。污水污泥的最佳温度曲线是 240°C。能量残留为91%，质量残留为85%。在这两种情况下，较高的温度都会导致过多的质量和能量损失。