NOVELTY - Domestic garbage land fill processing involves executing upper layer aeration; forming environment having aerobic upper lay, anoxic middle, and anaerobic lower layer, in the aerobic area; oxidizing ammonia into nitrate under the action of autotrophic nitrobacteria, in the anoxic area; making the nitrate deoxygenized into nitrogen to be released from the liquid phase by the nitrobacteria taking the organic matter as electron donor; transferring and removing ammonium-nitrogen, in the anaerobic area; and deteriorating the organic matter to generate the methane.    USE - Method for domestic garbage land fill processing.    ADVANTAGE - The process provides biological denitriding function in the bioreactor land fill field, does not need process outside of the field aiming at the percolation liquid, and provides low investment operation cost.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for domestic garbage land fill bioreactor comprising a circulatory system having bottom percolation liquid outlet of last level reactor connected with top percolation liquid inlet of the next level reactor with the three-level methanogenesis reactor of fresh garbage land fill field. Garbage room and gas room are set in each level reactor. An aeration layer is set on the upper layer of a nitration reactor. The aerobic area, the anoxic area, the anaerobic area are in the nitration reactor garbage room from up and down in turn. The methanogenesis reactor is connected with the top percolation liquid inlet of the nitration reactor by a three-phase separator. The gas phase passage of the three-phase separator is connected in a collecting gaseous envelope. Gas gathering tubes are set in the methanogenesis reactor. They are connected in the collecting gaseous envelope. A water-collecting bottle and inlet pump are set on the percolation liquid runner pipe between each level reactor. A gravel layer is laid under the bottom of each level reactor garbage room. A sand layer is set at the top of each level reactor garbage room.    DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of domestic garbage land fill processing (Drawing includes non-English language text).