NOVELTY - An organic refuse processing system comprises a slurrying means to slurry organic refuse, a means to supply the organic refuse slurry to a methane generator, and a means to supply generated methane to a fuel cell, a residue settling tank (24) to settle residue in waste water ejected from the methane generator (17), and a residue supply means to supply residue precipitated in the settling tank to the methane generator. A power generator generates power using the produced methane.    USE - For generating electricity.    ADVANTAGE - The quantity of organic refuse required for generating methane is reduced. The environmental disruption accompanied by incineration and abandonment of refuse is reduced. Since the use of the refuse bag for transporting the refuse is reduced, the transportation cost is reduced. Supplement income is obtained by selling a dump power to an electric power firm. Since methane is generated from the refuse, the refuse which is a waste material is effectively used.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (i) a gas supply method involving supplying organic refuse precipitate to a gas generator through a pipe; and    (ii) a gas supply system for fuel cells comprising:    (a) a satellite unit (5) which slurries an organic refuse,    (b) a storage unit (11) which stores the slurried organic refuse,    (c) a means of transportation which carries the slurried organic refuse in the storage unit (11) from the satellite unit,    (d) a gas generator (17) which forms methane from an organic refuse stored in the storage part,    (e) a settling tank (24) which settles waste water ejected from the methane generator (17), and    (f) a transport apparatus which conveys residue precipitated in a settling tank to the gas generator.    DESCRIPTION OF DRAWING(S) - The figure shows the block diagram of the gas supply apparatus. (Drawing includes non-English language text).    Satellite unit (5)    Slurried organic refuse storage unit (11)    Methane generator (17)    Settling tank (24)    gas storage tank (31)