NOVELTY - A treatment system has primary reactor defining at least2 reactor zones, drainage mechanism for draining organic rich liquor from primary reactor, liquid circulation mechanism for returning spent liquor from secondary reactor to primary reactor, gas recovery mechanism for collecting biogas, aeration mechanism, and excavation mechanism.    USE - Used for continuous decomposition of organic material to produce biogas and compost (claimed).    ADVANTAGE - The invention is able to convert solid and semi-solid organic material, potentially supplemented by liquid organic material and/or water into energy and soil conditioners.    DETAILED DESCRIPTION - The treatment system comprises primary reactor defining at least2 reactor zones for continuous receipt of organic material, one of the zones being adapted to receive the organic material while the material in the other zone is being decomposed for excavation as raw compost; drainage mechanism for draining organic rich liquor from the primary reactor, a secondary reactor for anaerobic digestion of organic rich liquor drained from the primary reactor to produce spent liquor and biogas; liquid circulation mechanism for returning spent liquor from secondary reactor to primary reactor; gas recovery mechanism for collecting biogas from the primary and secondary reactors; aeration mechanism for aerobic decomposition of organic material in the primary reactor; and excavation mechanism for removing compost from the primary reactor and to free a reactor zone for receiving another charge of organic material.    An INDEPENDENT CLAIM is also included for a method of operating organic treatment facility for decomposing organic material to produce biogas and compost comprising charging a selected reactor zone with organic material in primary reactor; allowing the organic material to decompose anaerobically for predetermined period of time in reactor zone charged with the organic material; aerating decomposing organic material in same reactor zone where it has decomposed anaerobically to produce raw compost; and excavating the raw compost from the reactor zone to prepare the zone to be charged with another charge of organic material.    DESCRIPTION OF DRAWING(S) - The figure is a flowchart illustrating the method of operating organic treatment facility for decomposing organic material.