Abstract
Recently, the increase in production, consumption causes the shortage of the natural resources and the increase in waste disposal. In order to build up a sustainable society, the input and the output of the natural system should be reduced by the recirculation of materials and energy. We have tried to develop a recycling technology of inorganic wastes using the hydrothermal processing. The starting materials were the incinerated ash from sewage sludge and construction sludge. Ca(OH)2 was added to waste. The mixtures were formed and autoclaved at 180°C under saturated steam pressure. The flexural strength of the specimens varied from 3.2 to 16.2 MPa. These solidified inorganic waste have good performance of humidity control. Numerical simulation method based on heat and moisture transfer model was studied to estimate performance of hydrothermally solidified inorganic waste. Numerical model was calculated by the relative humidity changes in the physical space with temperature changes. Simulation result was compared with experimental measurement. Simulated values by calculating with non linear material property were in good agreement with experimental measurements.
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