The article discusses new developments in sewage sludge treatment and use, focusing on technological aspects and environmental effects. It covers topics such as sludge characterization, methods of applying sewage sludge to land, alternative uses of sludge, removal of heavy metals, and sludge dewatering. Key findings include the potential for high-pressure dewatering with polymer conditioning to enable energy-independent incineration of sewage sludge, as well as the importance of considering environmental aspects in sludge incineration and landfilling processes. Overall, the research aims to improve the quality of sewage sludge and explore various options for its treatment and disposal.