TY - JOUR N2 - 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. L1 - http://journals.pan.pl/Content/102422/PDF/aep-2016-0043.pdf L2 - http://journals.pan.pl/Content/102422 PY - 2016 IS - No 4 DO - 10.1515/aep-2016-0043 KW - torrefaction KW - sewage sludge KW - Biochar KW - calorific value KW - solid fuel KW - ash A1 - Pulka, Jakub A1 - Wiśniewski, Dariusz A1 - Gołaszewski, Janusz A1 - Białowiec, Andrzej PB - Polish Academy of Sciences VL - vol. 42 DA - 2016.12.15 T1 - Is the biochar produced from sewage sludge a good quality solid fuel? UR - http://journals.pan.pl/dlibra/publication/edition/102422 T2 - Archives of Environmental Protection ER -