Abstract: An apparatus for rapid fermentation and drying is disclosed. The apparatus includes: a body; a dual jacket type treatment vessel formed in the body; a liquid waste retention basin communicated with the outside; an introduction section for introducing liquid waste stored in the liquid waste retention basin into the treatment vessel; an agitator agitating treated material in the treatment vessel; an energy recycling reaction means having a plurality of heat exchangers connected in series, at least one heater, and at least one catalyst reactor therein; a heater and a heat-exchanging section; a blower supplying the overheated steam discharged from the energy recycling reaction means to the heat-exchanging section of the treatment vessel; a steam/water separator having a heat-exchanging coil therein; an air supply duct having an air pre-heater therein; and a pipeline connected to the two heat-exchanging coils and having a circulation pump.