TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Method: The method comprises delivering and extracting air from the third treatment zone.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The waste treatment chamber comprises: a third treatment zone; a pair of parallel elongated walls, and a roof spanning between the walls and doors at both ends of the chamber such that the interior volume of the chamber is closed, where the roof comprises two roof sections projecting towards each other from respective walls, and the roof sections are spaced apart to define a longitudinal opening running the length of the chamber (parallel to and off set from the walls); and a cover to shroud the longitudinal opening. The longitudinal opening is closed by a flexible seal and is of sufficient width to enable an operating arm of a machine to extend into the chamber through the opening. The atmosphere control system comprises: air pressure, temperature and humidity control means which monitors the air pressure, temperature and humidity respectively in each treatment zone; a third air delivery means and a third air extraction means in order to deliver and extract air respectively from the third treatment zone; a booster unit to generate airflow between the first air extraction means and the second air delivery means, where the air moves upward in the first and third treatment zones, and downward in the second treatment zone; a first operating mode where the waste treatment chamber is not in operation and a second operating mode where the waste treatment chamber is in operation; and a drainage system. The first air delivery means comprises a delivery which delivers air into a chamber located underneath a perforated floor member, where the delivery conduit comprises at least one vent to deliver air into the chamber. The vent comprises a variable controlled damper. The first air extraction means comprises many perforated air conduits, where each perforated air conduit comprises guard means which is arranged to prevent propelling of waste by a waste turner into the perforations.