NOVELTY - The plant (1) consists of a primary treatment apparatus (2) for processing waste with added ferment microbe solution (9). The waste material is chopped into pieces and fermented aerobically in a stir fermentation apparatus (3) with addition of water component adjusting material (22). The material is packed sealed and piled in heaps where anaerobic fermentation of the material proceeds.    DETAILED DESCRIPTION - The primary treatment apparatus consists of a precipitate tank (6) and sprinkler (8) for sprinkling ferment microbe solution from supplying apparatus (9) on the organic waste to be processed in the tank. The solution permeates the waste material which is carried to a hopper (16) via a conveyor (7) dripping water on the material under process. The hopper drops the material in a chopper (18) which chops it to pieces and a draining apparatus (19) drips water on the chopped pieces. The materials fermented in a stir fermentation apparatus (3) aerobically where it is stirred with water component adjusting material (22) by a stirrer (21). The material is packed, sealed and piled in heaps on pallets (4) for storage where anaerobic fermentation of the material proceeds.    USE -   The plant is useful for manufacturing compost from organic refuse, livestock waste, wastes from homes, food stuff industries, agriculture, forestry etc.    ADVANTAGE -   By decreasing the quantity of water component adjusting material added to waste material in the fermenter, zymosis can be promoted. By adjusting the temperature of the environment around the processed material, heat release from the material is promoted and temperature of the fermented material is maintained at a suitable level.    DESCRIPTION OF DRAWING(S) - The figure shows the model of a compost manufacturing plant. (1) Plant; (2) Primary treatment apparatus; (3) Stir fermentation apparatus; (4) Pellets; (6) Precipitate tank; (8) Sprinkler; (9) Supplying apparatus; (16) Hopper; (18) Chopper; (19) Draining apparatus; (21) Stirrer; (22) Water component adjusting material supply apparatus.