Abstract
The aim of the present study is to decompose night soil by a hydrothermal reaction system. Four kinds of simulated night soil were decomposed by the hydrothermal method using an autoclave. A continuous reaction apparatus was produced, and then the night soil was continuously decomposed by this apparatus.
From the results using the autoclave, all simulated night soil were decomposed over 80%, when the conditions of hydrothermal reaction were at 300°C, for 10min, at 4MPa of O2 gas. The continuous decomposition of night soil was successfully performed at 300°C of reaction temperature, for 5min of reaction time, 200ml/min of flow rate, 0.33Nm3/h of O2 gas and at 13MPa of pressure in the reactor. The decomposition rate, which was similar to that for the autoclave, was obtained by the continuous apparatus.
