Phase Changing of Garbage from Solid to Liquid Slurry by Thermal Liquidization

抄録

The phase of a model garbage was changed from solid to liquid slurry by thermal liquidization for the purpose of easy handling. The garbage was prepared by mixing cabbage, boiled rice, boiled and dried sardine, butter, and the shell of short-necked clam, and its moisture content was 86.4 wt%. It was heated under a pressurized nitrogen atmosphere at 150, 200, or 250°C for 0.1 or 1 h with or without sodium carbonate as a catalyst (5% on a dry solid basis). In the liquidized garbage produced, the solid particles were suspended. Slight sedimentation of the particles was observed for the liquidized garbage obtained at 150 and 200°C, however the particles settled rapidly for the liquidized garbage obtained at 250°C. The liquidized garbage was regarded as a pseudo-plastic fluid from viscosity measurements, and the apparent viscosity decreased significantly with the reaction temperature.