In this paper, a method for drying a variety of untreated organic waste, and carbonizing the dried material under a reduced pressure, thereby achieving a more stable and economical treatment for the waste materials, and an apparatus for performing the method were discussed. If we use speedy dryer, organic waste can be changed to useful feed and liquid composts. With the method and apparatus, it is possible to separate condensate water from a high-temperature and high-humidity air stream. Extra dried materials can be used to solid fuel. This has the effects of prohibiting the generation of contaminants and environmental pollution while reducing fuel costs, and a carbide, obtained via the drying and carbonization of the waste material, is available into solid fuel having superior burning efficiency. The condensate water can be used to deodorants.