There is an increasing demand for sustainable resources due to a steady increase in energy demand. As the1996 Protocol to the London Convention takes effect, conversion of sewage sludge to energy is increasing. To use waste as fuel, it is important to understand its combustion characteristics. Using thermogravimetric analysis, the combustion of coal, dried sewage sludge, and SRF was characterized in this study. Dried sludge and SRF showed similar combustion behavior at all temperature increase rates of 5, 10, 25, 40, and 100oC/min. Coal burned at a higher temperature as the temperature rate increased. This may be ascribed to the much higher volatile matter contents of dried sludge and SRF comparative to coal.