organic waste disposal treatment apparatus includes a treatment chamber assembly in which a compost bed may be formed , an inlet to the treatment chamber assembly through which organic waste may be added to a compost bed in the treatment chamber assembly , ventilation means for promoting aerobic digestion of the compost bed in the treatment chamber assembly , drainage means for preventing waste material in the treatment chamber assembly from becoming anaerobic and access means for accessing and removal of compost formed in the treatment chamber assembly . the treatment chamber assembly includes a holding tank formed of plastics material , the access means includes a closed conveyor for conveying compost from the lower zone of the compost bed . the treatment chamber assembly may include an air permeable division for diving a duct from the compost bed . it is also preferred that the holding tank be partially filled with an active bed of compost .