Constant circular and vertical mixing of sludge or slurry to ensure homogeneous drying. Drum can also be the disposal vessel to minimize handling. Timer controlled to avoid over drying. Temperature controlled for safe drying. The ENCON Drum Evaporator/Dryer completely encapsulates a 55 gallon drum of sludge or slurry and heats it from outside the drum. Since the heating elements do not contact the sludge or slurry there is no requirement to clean the heat transfer surface. Temperatures are controlled with a thermocouple and timer system to provide consistent heating and accurate level of dryness. Hi torque motor and gear reducer provide gentle and consistent agitation even as solutions become more viscous and solid. The ENCON Drum Dryer can also be used as a standard ENCON Drum Evaporator. Once the wastewater is reduced to a sludge or slurry, the unit can be switched to dryer mode to bring the residue to a dry state.