To decompose organic waste such as human excreta in an economical, efficient, and swift manner, while reducing a bad smell, by uniformly and ideally mixing the excreta with microorganism carriers or the like in a way that no excessive force can act on the microorganism.
This treatment apparatus designed to decompose excreta with microorganism carriers, is made of an inorganic porous sintered particles that emit far-infrared rays for decomposition by microorganism. The apparatus is provided with stirring members 6A and 6B for mixing excreta 7 supplied in a treatment tank 8 with microorganism carriers 9, which allows aerobic bacteria to inhabit the microorganism carriers 9. Such aerobic bacteria work to decompose the excreta 7 supplied in the treatment tank 8.