NOVELTY - A preprocessed liquid in tank (2) is dried and fermented. Sewage residue (21) and waste plastic (22) are supplied to cracking unit (23). Carbonized gas generated in unit (23), is burnt in combustion furnace (24) and the produced gas is supplied to steam boiler (25) to generate steam. The steam ejected from turbine is supplied to drier (7) and carbide generated in unit (23) is supplied to fermenter (10).    USE - For processing feces, urine and plastic waste.    ADVANTAGE - The chemical treatment of residual sludge is eliminated. The sewage residue is decomposed to form fuel and the carbide generated in energy regenerating system is used as supplementary material for fermentation process. Therefore, the disposable of waste is reduced. The electric power generated by the energy regenerating system is used as electric power for the operation of the process. Therefore, energy is efficiently conserved. The exhaust steam is used as heat source of drier, therefore supplementary fuel for drying is unnecessary.    DETAILED DESCRIPTION - A purification tank contains a preprocessed liquid from which sewage residues in feces and urine are removed. The preprocessed liquid is supplied to drier and dried raw material sludge having predetermined moisture content is subjected to aerobic fermentation in a fermenter. The sewage residue and waste plastic are supplied to gasification cracking unit. The carbonized gas generated in cracking unit is burnt in a combustion furnace. The combustion gas generated is supplied to steam boiler to produce steam which is then supplied to steam turbine. The steam ejected from steam turbine is supplied to drier as heat source and the carbide generated in cracking unit is supplied to fermenter.    DESCRIPTION OF DRAWING(S) - The figure shows processing method of organic compost.    Tank (2)    Drier (7)    Fermenter (10)    Sewage residue (21)    Waste plastic (22)    Cracking unit (23)    Combustion furnace (24)    Steam boiler (25)    Generator (27)