This Technical Report describes good practice for the incineration and other organic matter treatment by thermal processes of sludges. Thermal conditioning is excluded. This Technical Report is applicable for sludges described in the scope of ISO/TC 275 specifically derived from: — storm water handling; — night soil; — urban wastewater collecting systems; — urban wastewater treatment plants; — treating industrial wastewater similar to urban wastewater; It includes all sludge that may have similar environmental and/or health impacts but excludes hazardous sludge from industry and dredged sludge.