History of Solid Waste Analysis at Osaka City and Role of Osaka Municipal Hygienic Laboratory

Osaka City has addressed the resolution of solid waste problems from the middle of Meiji era, and conducted fullscale research on disposal in the middle of Taisho era. It was the first time that City analyzed solid waste in detail within the research. City also analyzed solid waste in Showa era for the study of disposal method. In this study, experimental separate collection was implemented and separated solid wastes were analyzed. The Osaka Municipal Hygienic Laboratory took charge of analysis in those researches, and also analyzed solid waste independently. After the World War II, when City introduced continuous incineration plant from Europe, the Laboratory compared the conventional method of solid waste analysis with the method introduced from Europe, and found that there was little difference between two methods, and have established the analytical method that has been used until now. In the material, the results of solid waste analysis conducted in those studies are shown.