An apparatus for processing material such as organically coated waste and organic materials including biomass, industrial waste, municipal solid waste and sludge, comprising: a rotatable furnace having a body portion, a single material entry point and a tapered portion between said entry point and said body portion of the furnace; means for rotating the furnace about its longitudinal axis; oxidising means (6, 31) for at least partially oxidising volatile organic compounds in gases released by processing of said material; and passage means for conducting said gases from said furnace to said oxidising means (6, 31); wherein said passage means is sealed to said furnace and said oxidising means thereby to prevent the ingress of external air characterised in that: said furnace is tiltable and the apparatus further comprises means (32, 102) for tilting the furnace; the apparatus further comprises: a gas analyser means configured to monitor the level of oxygen and carbon monoxide in the gas entering, and the gas exiting the furnace, and to provide a signal representative of each level, and control means configured to control the temperature of the furnace and the oxidising means (6, 31); wherein the controller is configured to control the process finishing time by identifying the completion of the processing of the material by identifying the levelling of the signals from the gas analyser means representative of the CO and O 2 levels entering and exiting the furnace. a rotatable furnace having a body portion, a single material entry point and a tapered portion between said entry point and said body portion of the furnace; means for rotating the furnace about its longitudinal axis; oxidising means (6, 31) for at least partially oxidising volatile organic compounds in gases released by processing of said material; and passage means for conducting said gases from said furnace to said oxidising means (6, 31); wherein said passage means is sealed to said furnace and said oxidising means thereby to prevent the ingress of external air characterised in that: said furnace is tiltable and the apparatus further comprises means (32, 102) for tilting the furnace; the apparatus further comprises: a gas analyser means configured to monitor the level of oxygen and carbon monoxide in the gas entering, and the gas exiting the furnace, and to provide a signal representative of each level, and control means configured to control the temperature of the furnace and the oxidising means (6, 31); wherein the controller is configured to control the process finishing time by identifying the completion of the processing of the material by identifying the levelling of the signals from the gas analyser means representative of the CO and O 2 levels entering and exiting the furnace. said furnace is tiltable and the apparatus further comprises means (32, 102) for tilting the furnace; the apparatus further comprises: a gas analyser means configured to monitor the level of oxygen and carbon monoxide in the gas entering, and the gas exiting the furnace, and to provide a signal representative of each level, and control means configured to control the temperature of the furnace and the oxidising means (6, 31); wherein the controller is configured to control the process finishing time by identifying the completion of the processing of the material by identifying the levelling of the signals from the gas analyser means representative of the CO and O 2 levels entering and exiting the furnace.