PROBLEM TO BE SOLVED: To provide an industrially advantageous digestion treatment method for organic waste which decomposes or digests organic matter in organic waste rapidly in a high decomposition ratio and produces methane or fertilizer efficiently, and an apparatus therefor. SOLUTION: Mordenite type zeolite is added to perform anaerobic digestion treatment. This treatment method has a process (I) for supplying organic waste and mordenite type zeolite to an anaerobic digestion tank and a process (II) for subjecting the supplied mixture of the mordenite type zeolite and the organic waste to be digested to anaerobic digestion treatment in the presence of anaerobic digesting sludge. Preferably, the obtained gaseous phase part is recovered as fuel and the obtained solid phase part is recovered and used as organic fertilizer or the like. COPYRIGHT: (C)2004,JPO&NCIPI
